Temat: humic - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Ability of Humic Acid in the Absorption of Heavy Metal Content of Lead and Iron in Fish Culture Media
Autorzy:: Kiswanto
Wintah
Powiązania:: https://bibliotekanauki.pl/articles/24201770.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: humic acid
heavy metals
fish farming media
Opis:: The young coal mining pits (young pits) found in West Aceh cause many problems. These pits that form ponds have the potential to be utilized for aquaculture activities. However, the main problem faced in the young pits is the high content of heavy metals. This makes the ponds dangerous for fish farming. Hazardous heavy metals in coal mines are Pb and Fe. Humic acid is one of the materials that can be used to minimize heavy metals and increase water pH. The use of humic acid is more efficient because this technology is easy and cheap and the raw materials are abundant. Humic acid acts as a substance of cation exchange ability found in compost. This research has a long-term goal of making humic acid contained in compost as an alternative material that can minimize heavy metals Pb and Fe, so that it can be used for fish farming activities. The specific objective is to determine the best capacity (dose of humic acid) in minimizing heavy metals and increasing the pH of young pond water in former mines and its effect on fish farming. This research method used a completely randomized design consisting of one factor, namely the dose of humic acid (0 g/L, 2.5 g/L, 5 g/L, 7.5 g/L) and three replications. The results showed that humic acid was able to minimize the content of heavy metals Pb and Fe in coal mine water with the best dose of 5 g/L. The percentage reduction produced was more than 90%. The results of fish rearing using ex-mining pond water treated with humic acid showed that the survival rate and growth rate of fish were higher.
Źródło:: Journal of Ecological Engineering; 2023, 24, 5; 95--102
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Application of a modified method of humic acids extraction as an efficient process in the production of formulations for agricultural purposes
Autorzy:: Nieweś, Dominik
Marecka, Kinga
Braun-Giwerska, Magdalena
Huculak-Mączka, Marta
Powiązania:: https://bibliotekanauki.pl/articles/27315662.pdf
Data publikacji:: 2023
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: Humic acids (HA)
Peat
Ultrasound-assisted extraction
Fertilizers
Process optimization
Opis:: Due to their properties, humic acids (HA) can interact with macro- and micronutrients and retain plant nutrients in the soil profile. The aim of the presented work was to develop a new integrated 4-step process for the isolation of humic acids from peat with their simultaneous enrichment in macronutrients. The study demonstrated the possibility of replacing traditional solutions used in the extraction of humic acids with solutions that are a source of macronutrients. For the alkaline extraction step, a process assisted with ultrasound was implemented, which allowed to increase the efficiency of humic acids isolation. Optimization of this step has shown that, with the application of ultrasound in the new procedure, it is possible to obtain the humic acids isolation efficiency of more than 60%. The qualitative analysis of the products obtained confirmed the presence of structures characteristic of humic acids, including key functional groups.
Źródło:: Polish Journal of Chemical Technology; 2023, 25, 3; 31--39
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Eco-Friendly Principles on the Extraction of Humic Acids Intensification from Biosubstrates
Autorzy:: Malyushevskaya, Antonina
Koszelnik, Piotr
Yushchishina, Anna
Mitryasova, Olena
Mats, Andrii
Gruca-Rokosz, Renata
Powiązania:: https://bibliotekanauki.pl/articles/2202369.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: eco-friendly technology
environmental security
extraction
electric discharge
humic acid
biosubstrate
peat
Opis:: It is necessary to find innovative ways to improve the environmental performance of production processes and products. The technology of extracting valuable components from raw materials of plant origin is often used in technological processes of the food, pharmaceutical, chemical and other industries. Extraction is the most energy intensive step. The factors contributing to the extraction of humic acids from plant substrates under the action of electric discharge were studied. The purpose of the work was to study the efficiency of humic acids extraction from the biosubstrate under the action of electric discharges. The physical experiment showed that the main factor influencing the intensity of extraction is the degree of grinding of the solid phase of the biosubstrate-water suspension. The efficiency of electric discharge grinding depends on the pressure amplitude at the distance of the inner radius of the chamber and the number of discharge pulses. It was established that the number of chemical reagents (alkalis), usually used in the process of extracting humic acids from peat, can be reduced many times due to the appearance of radicals and peroxide compounds in the peat-water suspension resulting from the action of an electric discharge. The prospects of the non-thermal electric discharge method of intensification of the extraction of humic acids from biosubstrates were determined.
Źródło:: Journal of Ecological Engineering; 2023, 24, 2; 317--327
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Effect of Seeding Rate and the Spraying with Licorice Extract in Oil Percentage and Active Ingredients of Caraway (Carum Carvi L.)
Autorzy:: Hassan, Ahmed Yassin
Powiązania:: https://bibliotekanauki.pl/articles/24201720.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: caraway
carvone
limonene
humic acid
seeding rate
Opis:: A field experiment was conducted to study the effect of three levels of seeding rate (4.7 and 10 kg•h-1) and three concentrations of licorice extract (0.3 and 6 g•L-1) the data were analyzed statistically by using a factorial experiment according to the randomized complete block design (RCBD) with three replicates. The results showed that the seeding rate 7 kg•h-1 gave a significant increase in seeds yield, volatile oil yield, and limonene ratio, which were 1162.6 kg•h-1, 25.6 kg•h-1, and 30.41%, respectively. In turn, seeding rate 4 kg•h-1 gave a higher average of the volatile oil percent and carvone percent, which were 2.3 % and 67.27%, respectively. The results also revealed that spraying of licorice extract with 3 g•L-1 gave significantly influenced in seeds yield and volatile oil yield which were (1016.6 and 23.3 kg•h-1) respectively, whereas the spraying of licorice extract with 6 g•L-1 gave the highest ratio of carvone and limonene which were 29.71% and 67.54% respectively. The interaction between the seeding rate of 7 kg•h-1 and licorice extract with 3 g•L-1 had a significant effect on seeds yield and volatile oil yield, which amounted to (1234.2 and 28.4 kg•h-1), respectively.
Źródło:: Journal of Ecological Engineering; 2023, 24, 4; 140--150
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Effects of Humic Acid Extracted from Organic Waste Composts on Turnip Culture (Brassica rapa subsp. rapa) in a Sandy Soil
Autorzy:: Aylaj, Mina
Sisouane, Mhammed
Tahiri, Soufiane
Mouchrif, Yassine
El Krati, Mohammed
Powiązania:: https://bibliotekanauki.pl/articles/27323830.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: compost
humic acid
turnip
growth
chlorophyll foliar
protein
total soluble sugar
Opis:: Adding humic acid to soil can improve soil structure and fertility, which can lead to better plant growth and higher crop yields. Extracting humic acid from compost is a sustainable and environmentally friendly way to obtain a valuable organic material. Humic acid (HA) can be extracted from compost relatively easily and at a low cost, making it an attractive option for farmers. In this study, we investigated the use of sugarcane bagasse (SB) and immature horse manure (IHM) as bulking agents for the composting of separated municipal solid waste (SMSW) and the extraction and characterization of humic acid from the mature composts produced. Fertilizing solutions containing different concentrations of humic acid were prepared and used to evaluate their effects on turnip crop growth and various biochemical parameters during cultivation. The results showed that the humic acid extracted from the composts had high yields and were rich in elemental carbon. The application of humic acid at both low and high concentrations resulted in a significant improvement in all the parameters measured except for the total protein in the roots, which did not differ significantly between the humic acid concentrations. The yield, root diameter and fresh weight increased significantly, and the leaf area was proportional to the humic acid concentration of the solution used. The highest increase in chlorophyll a content was observed in the treatment of humic acid extracted from composts C2 and C3 at a concentration of 0.1 gL-1, with an increase of 31% and 37%, respectively, compared to the control. The use of humic acid provided by co-compost can be considered a successful management strategy for degraded sandy soils and sustainable agriculture production in sandy poor soils worldwide.
Źródło:: Journal of Ecological Engineering; 2023, 24, 7; 345--359
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: The Influence of the Presence of Iron in Highly Alkaline Polyaluminium Chlorides on the Effectiveness of Precursors of Disinfection By-Products Removal
Autorzy:: Krupińska, Izabela
Powiązania:: https://bibliotekanauki.pl/articles/27314882.pdf
Data publikacji:: 2023
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: humic acid
polyaluminium chlorides
organic substances
fulvic acids
iron-organic complexes
protective colloids
kwas humusowy
chlorek poliglinu
substancje organiczne
kwasy fulwowe
kompleksy żelazowo-organiczne
koloidy ochronne
Opis:: The mechanism of coagulation with highly alkaline polyaluminum chlorides is well understood, but there is a lack of information on the effect of the presence of iron in these coagulants on the efficiency of purifying water with increased contents of natural organic matters among which humic substances are precursors of disinfection by-products. The dissolved forms of organic substances are the most problematic with regard to water treatment because major concern is the formation of disinfection by products resulting from reactions between dissolved organic matter fractions and disinfectants. The aim of this study was to evaluate the effectiveness of precursors of disinfection by-products removal using highly alkaline polyaluminium chlorides that had different alkalinity and iron content. In the water after the coagulation process a value of SUVA254 was calculated because this indicator correlates well with dissolved organic matter reactivity and disinfection by-products. The analysis of the obtained results showed that the effectiveness of dissolved organic matter removal was determined by the formation of colored iron-organic complexes.
Źródło:: Civil and Environmental Engineering Reports; 2023, 33, 1; 109--121
2080-5187
2450-8594
Pojawia się w:: Civil and Environmental Engineering Reports
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Agricultural Use of Natural Biostimulants – Humic Substances: a review
Autorzy:: Kłeczek, Aneta
Powiązania:: https://bibliotekanauki.pl/articles/2174919.pdf
Data publikacji:: 2022
Wydawca:: Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:: humic substance
agriculture
biostimulant
Opis:: This work presents the characteristics of humic substances, with particular emphasis on the properties of agricultural importance, i.e., the improvement of soil structure, soil properties and the availability of nutrients. Attention was also paid to the methods of introducing given substances into the soil and the possibility of direct application to the plant surface. The mechanisms responsible for the stimulating and protective effect of humic substances on plant development were explained in detail, including phytohormonal regulation, the mitigation of biotic and abiotic stresses, antioxidant properties and the influence on seed germination and the development of the plant root system. The economic and environmental importance of the application of the substances in question was also emphasized, consisting of maintaining the health of the soil and the quality of plants while reducing the share of chemical fertilizers and reducing the amount of water used. It should be noted that humic substances, like any agricultural product, should be appropriately selected for the type of cultivation, i.e., the optimal dose and method of application should be determined.
Źródło:: Rocznik Ochrona Środowiska; 2022, 24; 1--14
1506-218X
Pojawia się w:: Rocznik Ochrona Środowiska
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Humic preparation and plant activity
Autorzy:: Abutova, Raikhan J.
Kozhakhmetov, Marat K.
Powiązania:: https://bibliotekanauki.pl/articles/2174295.pdf
Data publikacji:: 2022
Wydawca:: Instytut Technologiczno-Przyrodniczy
Tematy:: alkaloid stimulants
amino acids
fulvic acids
humic acids
lake sapropel
lignohumates
thermochemical technology
vortex reactors
Opis:: The purpose of this study was to investigate the effect of a biological humic preparation - “HUMIN PLUS”, made from natural raw materials - environmentally friendly lake sapropel on the biological development of agricultural crops. The study consisted in obtaining information and assessing the effect of a biological product on the dynamics of seedlings development, planting density, as well as crop productivity. To assess the preparation, as well as to identify the effect on the stages of plant ontogenesis, the physicochemical parameters were studied, including the content of humates, and trace elements in the sapropel extract. To interpret the effect of the growth regulator on the seed germination energy, an adaptive-neural inference system was used. To establish the nature of the action of preparation on the development biology of plant, in the conditions of Kazakhstan, a series of experiments were carried out at different stages of ontogenesis of agricultural crops. It was found that the action of the “HUMIN PLUS” preparation significantly increases the content of essential and nonessential amino acids. The findings have established that the sapropel extract “HUMIN PLUS” affects the biological activity of plants, accelerating the seed germination and increasing the productivity of agricultural crops in Kazakhstan.
Źródło:: Journal of Water and Land Development; 2022, 55; 104--108
1429-7426
2083-4535
Pojawia się w:: Journal of Water and Land Development
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Innovative technology of accelerated composting of chicken manure to obtain an organic fertilizer with a high content of humic acids
Innowacyjna technologia przyspieszonego kompostowania odchodów kurzych w celu uzyskania nawozu organicznego o wysokiej zawartości kwasów humusowych
Autorzy:: Balanda, Oksana
Serafinowska, Daria
Marchenko, Olha
Svystunova, Iryna
Powiązania:: https://bibliotekanauki.pl/articles/2204295.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Rolniczej
Tematy:: chicken manure
composting
aerobic bacteria
intelligent boxes
thermophilic phase
transformation phase
humic acids
fulvic acids
fertilizer
odchody kurze
kompostowanie
bakterie tlenowe
skrzynie inteligentne
faza termofilna
faza transformacyjna
kwasy humusowe
kwasy fulwowe
nawóz
Opis:: One of the most important fractions of soil organic matter which has significant environmental and agricultural importance is humus. The specific humus compounds of soil include the complex of amorphous organic humic substances which include humic acids, fulvic acids and humins. The effectiveness of the natural formation of active humic substances during composting processes depends on the chemical composition of organic residues and the environmental conditions influencing the development and activity of native microorganisms. The aim of the project was to build innovative composting boxes for chicken manure that allow to effectively obtain a fertilizer with the highest possible content of humic acids, by creating perfect and controlled conditions for the rapid development of indigenous thermophilic microorganisms and by combining it with the owned bio-acceleration technology. For perfect conditions (temperature, humidity, oxygen, pH) for the controlled growth of microorganisms, an algorithm of the dependence of the box operation parameters on the course of the biological process, was built. The product obtained after composting is an easily digestible complex organic fertilizer of brown-black colour, pH 7.5-8.0 and NPK 5:3:4 and a high content of native humic acids. Its use increases the growth of green mass of plants and improves soil fertility, which has been proved by the conducted pot research.
Humus jest jedną z najważniejszych frakcji materii organicznej gleby, która ma istotne znaczenie dla środowiska i rolnictwa. Poszczególne składniki próchnicy obejmują grupę amorficznych substancji próchnicznych, w tym kwasy humusowe, fulwowe i huminy. Skuteczność naturalnego tworzenia się aktywnych substancji próchnicznych podczas procesu kompostowania zależy od składu chemicznego osadów organicznych i warunków środowiskowych, które mają wpływ na rozwój i aktywność natywnych mikroorganizmów. Celem projektu było zbudowanie innowacyjnych skrzyni kompostowych na odchody kurze pozwalające na skuteczne uzyskanie nawozu o możliwie najwyższej zwartości kwasów humusowych poprzez stworzenie idealnych i kontrolowanych warunków dla szybkiego rozwoju miejscowych mikroorganizmów termofilnych oraz poprzez połączenie ich z własną technologią bio-akceleracji. Dla uzyskania idealnych warunków (temperatura, wilgotność, tlen, pH) dla kontrolowanego wzrostu mikroorganizmów, stworzono algorytm zależności parametrów operacyjnych skrzyni. Produkt uzyskany w drodze kompostowania jest łatwo rozkładalnym złożonym nawozem organicznym o brązowo-czarnym kolorze, pH 7,5-8,0 oraz NPK 5:3:4 i wysokim poziomie natywnych kwasów humusowych. Jego zastosowanie pozytywnie wpływa na wzrost zielonej masy roślin i poprawia żyzność gleby, co zostało udowodnione przeprowadzonymi badaniami.
Źródło:: Agricultural Engineering; 2022, 26, 1; 133--144
2083-1587
Pojawia się w:: Agricultural Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: The Performance of Electrocoagulation Process in Removing Organic and Nitrogenous Compounds from Landfill Leachate in a Three-Compartment Reactor
Autorzy:: Bagastyo, Arseto Yekti
Sidik, Fahrudin
Anggrainy, Anita Dwi
Lin, Jr-Lin
Nurhayati, Ervin
Powiązania:: https://bibliotekanauki.pl/articles/2027831.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: current density
electrocoagulation
humic substance
stabilized leachate
wastewater treatment
Opis:: In this study, the effectiveness of the electrocoagulation (EC) process was evaluated based on the reduction of organic and nitrogenous contaminants in landfill leachate. A three-compartment electrochemical reactor as pre-treatment of stabilized landfill leachate was carried out ahead of biological treatment. The removal efficiencies of COD, BOD, ammonia, and nitrate were analyzed at pH 4, 6, and 8 with the current densities of $20.83$ and $29.17 mA•cm^{–2}$. At pH 4, the highest removal of COD and $NH_4^+$ was obtained, i.e., in the range of 72–81% and 43–59%, respectively. The ratio of $BOD_5$/$COD$ was increased after EC, from initially 0.11 to 0.32 at pH 4. In addition, EC effectively removed humic substances in the leachate by targeting a large amount of high molecular weight humic substances, with around $10^3$ kDa. However, the higher removal efficiency observed at higher current density leads to higher specific energy consumption. At a current density of $29.17 mA•cm^{–2}$, the specific energy consumption obtained in EC was around $10–17 Wh•g^{–1}$ COD and $99–148 Wh•g^{–1}$ $NH_4^+$. This could be decreased up to 50% at an applied current density of $20.83 mA•cm^{–2}$ with slightly lower efficiencies.
Źródło:: Journal of Ecological Engineering; 2022, 23, 2; 235-245
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: A Case Study in Cianjur West Java, Indonesia: A Correlation Humic and Fulvic Acids with Mineralogical Composition and Physico-Chemical Analysis Using Partial Least Square
Autorzy:: Mulyani, Oviyanti
Joy, Benny
Kurnia, Dikdik
Powiązania:: https://bibliotekanauki.pl/articles/1838395.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: soils properties
humic acid
fulvic acid
partial least square
Opis:: Humic and fulvic acids are important materials for the health of the soil. This is related to the capability of humic and fulvic acids as chelating agent for pollutant in soil. The relationship between humic and fulvic acids with that of the soil properties is an important aspect to determine the characteristics of soil. Furthermore, production of humic and fulvic acids is a time-consuming process with several stages. Regarding this problem, the selection of sample size to study humic and fulvic acids is important. The relationship between the soil properties was analysed using the Partial Least Square (PLS) analysis, which is regarded as a solution to solve the analysis of complicated problems by offering a powerful approach. This study aimed to analyse the relationship between humic and fulvic acids, in terms of their mineral and physicochemical properties using the PLS method. The study was carried out in West Java, Indonesia. The results showed that the relationship between the chemical, physical, mineral contents with humic and fulvic acids, affected the negative and positive aspects of the relationship. Humic acids had a weak to good model category (0.269–0.940) with regards to the soil properties, and fulvic acids had a moderate model category (0.495–0.603) against all soil properties. Thus, the PLS method can solve a problem in study relationship between the soil properties with small sample and can help in understanding the soil characteristics in general.
Źródło:: Journal of Ecological Engineering; 2021, 22, 5; 191-204
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Characteristics of fulvic acids generated in communes waste landfills
Charakterystyka kwasów fulwowych generowanych na składowiskach odpadów komunalnych
Autorzy:: Orliński, Tomasz
Anielak, Anna M.
Powiązania:: https://bibliotekanauki.pl/articles/1845426.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: humic acids
fulvic acids
landfill
leachate
humic substances
kwasy humusowe
kwasy fulwowe
wysypisko
odciek
substancje humusowe
Opis:: The leachate problem is important and difficult to solve in Poland and in the world. The composition and their properties leachates depend on the age of the landfill, type of waste, climatic conditions and the mode of operation of the landfill. A significant part of landfilled waste is subject to so-called humification. This process stabilizes organic substances in the landfill and creates humic substances that penetrate into the leachate. The leaks contain many toxic impurities, such as PAHs, pesticides, polychlorinated biphenyls and other substances hazardous to human health and life, which can be sorbed by humic substances. Leachates from three municipal landfills, differing in the characteristics of the stored waste, were studied. Fulvic acids (FAs) were extracted on the basis of affinity for specific solvents along with the use of sorption. The obtained acids were subjected to a qualitative analysis of the content of micro-impurities, essential elements forming the structure of the fulvic acid molecule, and their infrared spectra were tested. It has been noticed that with the age of waste deposited, the content of elemental carbon increases, and the amount of oxygen and hydrogen decreases. The degree of purity of fulvic acids was influenced by the time of waste storage, and the sulfur content depended on their characteristics. With the time of waste storage, the characteristics of the acids obtained were approaching humic acids, and the intensity of absorption bands clearly increased. The spectra obtained correlate well with those of fulvic acids available in the literature, and the findings provide scientific confirmation of the need for further research on the characteristics of fulvic acids.
Porównanie charakterystyk kwasów fulwowych wydobywanych z odcieków z trzech różnych składowisk komunalnych, różniących się charakterystyką składowanych odpadów, czasem ich unieszkodliwiania oraz sposobem funkcjonowania składowiska. Materiałem użytym do badań były odcieki z trzech różnych składowisk komunalnych. Kwasy fulwowe ekstrahowano na podstawie powinowactwa do określonych rozpuszczalników oraz adsorpcji na złożu jonitowym i kationitowym. Ilość kwasów fulwowych określono wagowo. Otrzymane kwasy fulwowe analizowano pod kątem składu pierwiastkowego i widm FT-IR. Zauważono wyraźną korelację pomiędzy wiekiem składowiska odpadów, a zawartością węgla i tlenu w badanych kwasach fulwowych. Zawartość siarki wynikała jedynie z rodzaju składowanych odpadów. Wraz z wiekiem składowania odpadów, czystość kwasów fulwowych maleje, rośnie stopień zaromatyzowania cząsteczki, a charakterystyka kwasów fulwowych zbliża się do kwasów huminowych. Wiek składowania znacząco wpływa na intensywność pasm absorbancji. Każdy z badanych odcieków zawierał znaczną ilość kwasów fulwowych, które były znacząco zanieczyszczone substancjami nieorganicznymi. Kwasy fulwowe wykazały wysoką aktywność chemiczną, co powoduje, że stają się nośnikami toksycznych mikrozanieczyszczeń. W typowych procesach zachodzących na oczyszczalniach ścieków oraz zakładach uzdatniania wody, kwasy fulwowe nie są usuwane, przez co stwarzają zagrożenie dla życia ludzi. Jedynie poznanie szczegółowej charakterystyki kwasów fulwowych, pozwoli na opracowanie zadowalających metod nie tylko usuwania i oczyszczania kwasów ale również wykorzystywania na przykład do nawożenia gleby. Nadal skład elementarny oraz charakterystyka budzi ogromne kontrowersje wśród badaczy. Dlatego niezwykle ważne są dalsze badania odkrywające każdą kolejną część tych zagadkowych substancji.
Źródło:: Archives of Environmental Protection; 2021, 47, 1; 41-52
2083-4772
2083-4810
Pojawia się w:: Archives of Environmental Protection
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Comparison of packing media on stratified EPS and their role in the biofilm of trickling biofilter
Autorzy:: Dong, Bei
Zheng, Jie
Wen, Yi-Zheng
Lei, Xian-Yan
Zhang, Qian
Cao, De-Ju
Powiązania:: https://bibliotekanauki.pl/articles/2032860.pdf
Data publikacji:: 2021
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: EPS
spectroscopy
wastewater treatment
biological filter
ceramsite filter
humic
spektroskopia
oczyszczanie ścieków
filtr biologiczny
filtr keramzytowy
humus
Opis:: The research focused on such packing media as ceramsite, polypropylene balls, and elastic fillers, and analyzed the main characteristics of extracellular polymeric substances (EPS) in their filter biofilms. The EPS were categorized as soluble EPS (S-EPS) and bound EPS (B-EPS). The component characteristics of stratified EPS were investigated via UV-Vis spectroscopy and a three-dimensional excitation-emission matrix (3D-EEM). The results showed that the EPS content of ceramsite biofilm was 245.2 mg/g VSS, which was higher than those of elastic filler material and polypropylene ball by 1.26 and 1.51 times, respectively. The protein (PN) and polysaccharide (PS) ratio of EPS in the ceramsite filter material was highest in S-EPS and B-EPS, indicating that the EPS have a stable structure. More than 67.58% of EPS formed by ceramsite was tightly bound EPS (TB-EPS), which was beneficial to maintaining the stability of biofilms. The levels of proteins (PN) and humic substances formed by ceramsite contained in the TB-EPS were higher than those of elastic filter material and polypropylene balls. 3D-EEM fluorescence spectra revealed that TB-EPS formed by a ceramsite contained high concentrations of tryptophan, tyrosine, and humic substances. The dehydrogenase activity of biofilm formed by ceramsite filler was higher than that formed by elastic fillers and polypropylene balls.
Źródło:: Environment Protection Engineering; 2021, 47, 3; 25-36
0324-8828
Pojawia się w:: Environment Protection Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Environmental aspects of molecular composition of humic acids isolated from lake sediments of a permafrost-affected area of the Arctic
Autorzy:: Guzeva, Alina V.
Krylova, Ekaterina A.
Fedorova, Irina V.
Powiązania:: https://bibliotekanauki.pl/articles/16538448.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:: Arctic
Siberia
Lena Delta lakes
humic substances
permafrost
Opis:: Humic substances are ubiquitous in terrestrial and aquatic ecosystems. Humic acids (HAs) actively interact with organic and inorganic components of lake sediments. This interaction depends on the molecular structure and elemental composition of HAs. The presented research focuses on the investigation of the composition and molecular structure of humic acids isolated from lakes located in the Lena Delta in the Russian Arctic. The findings of the research are needed to estimate the potential capacity of humic acids to bind microelements, particularly toxic metals, in stable compounds. Surface sediment samples (0–10 cm) were collected from 8 lakes by Van Veen grab during the summer period of the “Expedition LENA 2019”. We analyzed elemental composition of the HAs samples. The results showed that the studied HAs of lake sediments are characterized by low nitrogen content and prevalence of aliphatic fragments in their molecular structure. Furthermore, it was found that the studied humic acids are less mature, showing mineralization processes dominant over humification, and have relatively low potential to complexation compared with soils of the Lena Delta as well as lake sediments of territories with more boreal climate conditions.
Źródło:: Polish Polar Research; 2021, 42, 3; 173-191
0138-0338
2081-8262
Pojawia się w:: Polish Polar Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Ograniczenie skutków suszy w uprawach poprzez stosowanie kwasów humusowych i biohumusu
Reduction of the effects of drought on crops by using humic acids and biohumus
Autorzy:: Gawroński, Damian
Powiązania:: https://bibliotekanauki.pl/articles/2047274.pdf
Data publikacji:: 2021-09-21
Wydawca:: Centrum Doradztwa Rolniczego w Brwinowie. Oddział w Poznaniu
Tematy:: uprawy
kwasy humusowe
biohumus
gleba
susza
niedobór wody
mikroorganizmy
crop plants
humic acids
soil
drought
water deficiency
microorganismy
Opis:: Zabezpieczenie roślin przed krótkotrwałymi i długotrwałymi niedoborami wody jest wyzwaniem ważnym i aktualnym w warunkach polskich. Potrzebę rewitalizacji gleb poprzez odbudowę próchnicy glebowej i przywrócenie równowagi mikrobiologicznej wymuszają zmiany klimatu i intensyfikacja rolnictwa, które wpływają ujemnie na bilans próchniczny oraz różnorodność biologiczną polskich gleb. Kluczowe w tym zakresie może okazać się wykorzystanie innowacyjnych produktów biotechnologicznych zawierających w swoim składzie kwasy humusowe, wyselekcjonowane szczepy bakterii i grzybów, naturalny biohumus oraz minerały ilaste to jest bentonit, montmorylonit czy illit. Szerokie spektrum oddziaływania produktów zawierających w swoim składzie powyższe komponenty oraz doświadczenia potwierdzające ich skuteczność, dowodzą potrzeby ich stosowania w produkcji roślinnej. Zwiększenie zawartości próchnicy w glebie to obecnie jeden z najbardziej efektywnych sposobów na trwałe podniesienie pojemności sorpcyjnej i wodnej gleb. W związku z powyższym produkty zawierające w swoim składzie skoncentrowane kwasy humusowe, naturalne biohumusy czy minerały ilaste zasługują na uwagę. Dzięki ich szerokiemu spektrum oddziaływania na właściwości bio-fizyko chemiczne gleb mogą stanowić skuteczne wsparcie oraz alternatywę dla gospodarstw rolnych, które nie dysponują wystarczającą ilością nawozów naturalnych. Poprawne stosowanie biotechnologicznych produktów nawozowych może pomóc w skutecznym ograniczaniu strat przy produkcji roślinnej powodowanych przez niedobory wody.
Protecting plants against short-term and long-term water shortages is an important and current challenge in Polish conditions. The needs for revitalizingsoils by bulding up humus content and restoring the microbiological balance is forced by climate changes and intensification of agriculture, which have a negative impact on the humus balance and biological diversity of Polish soils. Essential in this area may be use of innovative biotechnological products containing: humic acids, selected bacteria and fungi, natural biohumus and clay minerals, i.e. bentonite, montmorillonite or illite. The wide range and field tests of products containing the above components confirm their efficiency and the need for their use in plant production. Increasing the humus content in soil is currently one of the most effective ways to permanently increase the sorption and water capacity of soils. Therefore, products containing concentrated humic acids, natural biohumus or clay minerals deserve due attention. Their wide spectrum of interaction on the bio-physico-chemical properties of soils, makes they can be an effective support and alternative for farms that haven’t got a sufficient amount of natural fertilizers. Adequate application of biotechnological fertilizing products can help to effectively reduce losses in crop production, caused by water shortages.
Źródło:: Zagadnienia Doradztwa Rolniczego; 2021, 104, 2; 48-59
1232-3578
2719-8901
Pojawia się w:: Zagadnienia Doradztwa Rolniczego
Dostawca treści:: Biblioteka Nauki

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