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Wyświetlanie 1-15 z 58
Tytuł:
Experimental Observations and Assessment of Landfill Leachate Bioremediation by Autochthonous Fungi Species and their Effective Geoactivities
Autorzy:
Muksy, Renjbar
Kolo, Kamal
Powiązania:
https://bibliotekanauki.pl/articles/2202342.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
autochthonous fungi
pathogenic fungi
biosorption
biomineralization
decolorization
Opis:
Autochthonous fungi are potential successful agents in the process of bioremediation through their efficient adaptation to pollutant toxicity and competition with other microorganisms that are present in the leachate treatment plant. The leachate from municipal waste landfills was an important source of fungi. Even though some of these fungi have the potential to be human pathogens, such strains wh en used in biolo gical treatment approaches may serve as a possible tool for integrating the leachate bioremediation process because of the extracellular enzymes produced by fungal strains. In this study, the leachate sample was tested with regard to four parameters, including total dissolved solids (TDS), electrical conductivity (EC), pH, and the decolorization of the leachate sample by a number of indigenous species of fungi, which were observed by use of the culture techniques. The scanning electron microscope coupled with energy dispersive x-ray analysis, UV-spectrum, and reflected and transmitted polarizing light microscope were used in the research project to o bserve and assess the obtained data from the experimental work. The results indicated the various levels of efficiency of the isolated fungal strains in eliminating color, lowering TDS, EC, and pH through their geoactivities potential in metal biosorption and immobilization by biomineralization of new minerals in the growth environment and eventually reducing the metal bioavailability and toxicity.
Źródło:
Journal of Ecological Engineering; 2023, 24, 1; 312--327
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Removal of Ni(II) Ions by Citric Acid-Functionalised Aloe vera Leaf Powder – Characterisation, Kinetics, and Isotherm Studies
Autorzy:
Al-Amrani, Waheeba Ahmed
Abdullah, Rohaizan
Megat Hanafiah, Megat Ahmad Kamal
Suah, Faiz Bukhari Mohd
Powiązania:
https://bibliotekanauki.pl/articles/24201761.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
Aloe vera
biosorption
isotherm
nickel
wastewater
Opis:
Aloe vera leaves (AVL), a by-product of agricultural waste, have been applied as a biosorbent for reducing Ni(II) ions in aqueous solutions. The biosorption capability of AVL powder was enhanced through chemical treatment with 0.10 M citric acid solution. Fourier-transform infrared (FTIR) spectrophotometer, scanning electron microscope coupled with energy dispersive X-ray (SEM-EDX), pH of point-zero-charge (pHPZC), and pHslurry analyses were used to study the surface, and chemical properties of citric acid-treated Aloe vera leaf powder (CAAVLP). The setting for experiments such as pH solution, CAAVLP dose, initial concentration, and biosorption time was investigated. Maximum Ni(II) ion biosorption capability was determined to be 48.65 mg/g based on the Langmuir model at pH 6, a CAAVLP dose of 0.02 g, initial Ni(II) concentrations of 5 to 50 mg/L and biosorption time of 120 min. The data for the isotherm and kinetics were well matched with the Freundlich and pseudo-second-order models, respectively, with high regression correlation (R2) and low chi-square (χ2) values. The presence of more-COOH groups after treating AVL with citric acid resulted in more Ni(II) ions being able to be removed.
Źródło:
Journal of Ecological Engineering; 2023, 24, 4; 217--227
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biosorption Capacity of Activated Sludge Sand Bed for Removal of Copper from Treated Wastewater
Autorzy:
Trybułowski, Łukasz
Rogowska, Weronika
Zakrzewski, Jakub
Powiązania:
https://bibliotekanauki.pl/articles/2027810.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
copper ions
biosorption
wastewater
Opis:
In this paper, the biosorption capacity of activated sludge sand bed was investigated for copper removal from wastewater. A sand bed consisting of three layers was used for the study: (1) filter gravel with a diameter of 2 to 3 mm, (2) a biological part inoculated with 200 ml of flocculent activated sludge with a dry weight of 5 kg/$m^3$, (3) filter sand with a grain diameter of about 3 mm. The filter was fed with model wastewater prepared with sodium acetate, potassium nitrate, ammonium chloride, and potassium dihydrogen phosphate I and II basic. The source of Cu ions in the wastewater was $CuSO_4$. The model wastewater used in this study was collected every 24 hours. The experiment was terminated when the concentration of Cu in the treated wastewater sample was equal to that in the treated wastewater. Such a phenomenon was indicative of the depletion of the sorption capacity of the tested bed, which was observed after 26 days. The concentration of copper in raw and effluent from the bed was studied using atomic absorption spectroscopy (ASA) in samples mineralized in nitric acid ($HNO_3$) with the addition of perhydrol ($H_2O_2$). Two equilibrium models, Langmuir and Freudlich, were analyzed to study the absorption isotherms.
Źródło:
Journal of Ecological Engineering; 2022, 23, 2; 61-69
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of temperature, bed height, and particle size on Ni(II) removal in a continuous system: Modelling the break curve
Autorzy:
Villabona-Ortíz, Ángel
Tejada-Tovar, Candelaria
Ortega-Toro, Rodrigo
Peña-Romero, Keily
Botello-Urbiñez, Ciro
Powiązania:
https://bibliotekanauki.pl/articles/2073755.pdf
Data publikacji:
2022
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
biosorption
Dose–Response model
packed bed
Thomas model
Opis:
The objective of this research was to evaluate the adsorption capacity of the shell biomass (Dioscorea rotundata), taking into account the impact of temperature, bed height, and particle size on the removal of nickel(II) ions in aqueous solution in a continuous fixed-bed column system; performing the modelling of the break curve. The biomass was characterised by SEM-EDS analysis. The analysis found that it represents a rough, heterogeneous structure, rich in carbon and oxygen, with mesopores, and is suitable for removing heavy metals. It also determined the optimum parameters of the bed height, particle size, and temperature, keeping the pH and the initial concentration of the solution constant. The results revealed that the bed height and the particle size are the two most influential variables in the process. Ni(II) removal efficiencies range between 85.8 and 98.43%. It was found that the optimal conditions to maximise the efficiency of the process are temperature of 70°C, 1.22 mm particle size, and 124 mm bed height. The break curve was evaluated by fitting the experimental data to the Thomas, Adams-Bohart, Dose-Response, and Yoon-Nelson models, with the Dose-Response model showing the best affinity with a coefficient of determination R2 of 0.9996. The results obtained in this research showed that yam shell could be suggested as an alternative for use in the removal of Ni(II) ions present in an aqueous solution in a continuous system.
Źródło:
Journal of Water and Land Development; 2022, 52; 257--264
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Increasing Effectiveness of Heavy Metal Sorption by Biosorbent Microalgae Beads
Autorzy:
Rinanti, Astri
Fachrul, Melati Ferianita
Hadisoebroto, Rositayanti
Minarti, Astari
Sunaryo, Thalia
Powiązania:
https://bibliotekanauki.pl/articles/2173268.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
bead
sorbent
biosorption
functional group
heavy metal
Opis:
This research was conducted to overcome the Cu2+ heavy metal pollution in the environment through a biotechnological approach with heavy metal sorption process by microalgae beads. Biosorbent in form of beads was produced from Chlorella sorokiniana, Monoraphidium sp., and Scenedesmus obliquus tropical microalgae mobilized with Naalginate polymer. The sorption process is observed on a controlled batch culture with variations of temperature (25, 35, and 45 °C), and observation periods (200th, 220th, 250th, 270th min) as contact time. The absorption efficiency on each temperature variation reaches more than 90%, but the highest absorption efficiency rate is at 92.20% on 35 °C temperature and 200 minutes of contact time. Biosorbent beads with 2–3 mm of diameters show the best sorption ability than the 3–4 mm and 4–5 mm ones. Sorption process is also evident with the existence of intensity alteration on amide, ketone, and sulfhydryl function groups which were consistently weakened until the end of the sorption process. The beads utilized in this research are potentially reusable as biosorbent. Thus, further examination is required to acknowledge the maximum reutilization rate of the beads as biosorbent on heavy metal absorption process.
Źródło:
Journal of Ecological Engineering; 2022, 23, 7; 50--57
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biosorption of Pb(II) by the resistant Enterobacter sp. : Investigated by kinetics, equilibrium and thermodynamics
Autorzy:
Liu, Lei
Xia, Mengya
Hao, Jianwen
Xu, Haoxi
Song, Wencheng
Powiązania:
https://bibliotekanauki.pl/articles/2073764.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Pb(II)
biosorption
enterobacter sp.
kinetics
thermodynamics
Opis:
The Pb(II)-resistant bacterium was isolated from heavy metal-contained soils and used as a biosorbent to remove Pb(II). The strain was identified as Enterobacter sp. based on the 16S rRNA sequence analysis. The effect of biosorption properties (pH value, Pb(II) concentration, bacterial concentration and temperature) on Pb(II) was investigated by batch experiments. Results of FTIR and XPS showed that the biosorption process mainly involved some oxygen-containing groups (-OH and -COOH groups). The experimental results and equilibrium data were fitted by pseudo-second-order kinetic model and Langmuir model, respectively. The experimental biosorption isotherms fitted the Langmuir model, and the maximum biosorption capacity was 40.75 mg/g at 298 K. The calculated ΔGо and ΔHо were –4.06 and 14.91(kJ/mol), respectively, which indicated that biosorption process was spontaneous and endothermic. Results show that Enterobacter sp. will be an efficient biosorbent for Pb(II) removal.
Źródło:
Archives of Environmental Protection; 2021, 47, 3; 28--36
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Removal of reactive dye from aqueous solutions using banana peel and sugarcane bagasse as biosorbents
Autorzy:
Ahmed, Arif Eftekhar
Majewska-Nowak, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/2032951.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
reactive dye
biosorption
Eurozol Navy Blue
ENB
banana peel
barwnik reaktywny
biosorpcja
skórka banana
Opis:
The adsorption of Eurozol Navy Blue (ENB) reactive dye was examined using banana peel and sugarcane bagasse powders. Several parameters such as pH, contact time, agitation speed, temperature, initial dye concentration, and adsorbent dosage were considered and their impact on dye adsorption efficiency was evaluated. The removal percentages of ENB dye due to adsorption on banana peel and sugarcane bagasse were 72% and 70%, respectively. Simultaneous dosing of both biosorbents resulted in 68% dye removal. The Langmuir isotherm model was found to fit the adsorption of ENB dye on banana peel and sugarcane bagasse powders. The corresponding maximum adsorption capacities were equal to 24.09, 32.46, and 27.54 mg/g for banana peel powder, sugarcane bagasse powder, and the mixture of adsorbents, respectively.
Źródło:
Environment Protection Engineering; 2020, 46, 3; 121-135
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sorption of selected radionuclides from liquid radioactive waste by sorbents of biological origin : the alkaline earth alginates
Autorzy:
Fuks, Leon
Oszczak-Nowińska, Agata
Powiązania:
https://bibliotekanauki.pl/articles/2055671.pdf
Data publikacji:
2021
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
alginates
biosorption
radionuclides
caesium
strontium
americium
Opis:
The sorption of 241Am3+, 85Sr2+ and 137Cs+ by calcium, strontium and barium alginates has been studied under different operation conditions. The most prominent adsorption was found in the pH range of 5–6 for all systems, even if the observed dependence on the acidity of the solution was small. The most favourable time for the adsorption process was found to be about 2 h for calcium alginate and 4 h for the other two sorbents.
Źródło:
Nukleonika; 2021, 66, 4; 153--158
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biosorption of Lead and Cadmium Ions on the Green Parts of Daucus Carota
Bioserpcja jonów ołowiu I kadmu na zielonych częściach marchwi Daucus Carota
Autorzy:
Mucha, Martin
Powiązania:
https://bibliotekanauki.pl/articles/318440.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
biosorption
carrot
lead
cadmium
biosorpcja
marchew
ołów
kadm
Opis:
This study deals with utilization of milled stems and leaves of carrot (Daucus carota) for the adsorptive removal of Pb(II) and Cd(II) from the aqueous solution. Carrot was bought in the local grocery, it was dried at the laboratory temperature and milled. Prepared material was analysed by the infrared spectrometry which confirms good structural homogeneity of the sample. Kinetic measurements were performed for estimation of adsorption equilibrium time. Equilibrium of Pb(II) adsorption was established after 6 hours of contact time, equilibrium of Cd(II) adsorption was established after 24 hours of contact time. The isotherms’ measurements were realized with the contact time 24 hours for the estimation of adsorption capacities of the studied sorbent. Adsorption capacities were around 47 mg/g for Cd(II) and 154 mg/g for Pb(II). Changes of pH values of the sorption solutions were negligible but some amount of Ca(II), Mg(II), K(I) and Na(I) ions was released to the solution during adsorption process. Daucus carota stems and leaves exhibit good sorption capacities and they could be utilized for adsorptive removal of Pb(II) and Cd(II) ions from the aqueous solutions.
Artykuł dotyczy wykorzystania zmielonych łodyg i liści marchwi (Daucus carota) do adsorpcyjnego usuwania Pb (II) i Cd (II) z roztworu wodnego. Marchewkę kupiono w lokalnym sklepie spożywczym, wysuszono w laboratorium i zmielono. Przygotowany materiał analizowano za pomocą spektrometrii w podczerwieni, co potwierdziło dobrą jednorodność strukturalną próbki. Pomiary kinetyczne przeprowadzono w celu oszacowania czasu osiągnięcia równowagi adsorpcji. Równowagę adsorpcji Pb (II) ustalono po 6 godzinach czasu kontaktu, równowagę adsorpcji Cd (II) ustalono po 24 godzinach czasu kontaktu. Pomiary izoterm wykonano z czasem kontaktu 24 godziny w celu oszacowania zdolności adsorpcji badanego sorbentu. Zdolności adsorpcyjne wynosiły około 47 mg / g dla Cd (II) i 154 mg / g dla Pb (II). Zmiany wartości pH roztworów sorpcyjnych były znikome, ale pewna ilość jonów Ca (II), Mg (II), K (I) i Na (I) została uwolniona do roztworu podczas procesu adsorpcji. Łodygi i liście Daucus carota wykazują dobre zdolności sorpcyjne i można je wykorzystać do adsorpcyjnego usuwania jonów Pb (II) i Cd (II) z roztworów wodnych.
Źródło:
Inżynieria Mineralna; 2020, 2, 1; 139-143
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reduction and Biosorption of Cr(VI) from Aqueous Solutions by Acid- -Modifi ed Guava Seeds: Kinetic and Equilibrium Studies
Autorzy:
Ortíz-Gutiérrez, Marel
Alfaro-Cuevas-Villanueva, Ruth
Martínez-Miranda, Verónica
Hernández-Cristóbal, Orlando
Cortés-Martínez, Raúl
Powiązania:
https://bibliotekanauki.pl/articles/778567.pdf
Data publikacji:
2020
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
Guava seeds
chromium reduction
biosorption
isotherms
Opis:
The use of guava seeds (GS) and acid-modified guava seeds (MGS) for the removal of Cr(VI) from aqueous solutions was investigated. Batch-type experiments were performed with Cr(VI) aqueous solutions and biosorbents to determine the kinetic and equilibrium sorption parameters. Results indicated that GS and MGS were capable of reducing and remove Cr(VI) from solutions, but the reduction was only observed at some experimental conditions. Infrared analysis showed that several functional groups were involved in the reduction, and biosorption of Cr(VI), particularly alcohol, phenolic, carboxylic, and methoxymethyl structures. The mechanisms of reduction and biosorption depended upon the type of biosorbent, pH, and temperature of the system. The pseudo-second-order kinetic model describes the kinetic sorption data, and the Langmuir-Freundlich (L-F) model describes the isotherm data in most cases. Significantly high total chromium biosorption capacities were obtained. Acid modification of guava seeds improves chromium biosorption performance.
Źródło:
Polish Journal of Chemical Technology; 2020, 22, 4; 36-47
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simultaneous adsorption of heavy metals from water by novel lemon-peel based biomaterial
Autorzy:
Šabanović, Elma
Memić, Mustafa
Sulejmanović, Jasmina
Selović, Alisa
Powiązania:
https://bibliotekanauki.pl/articles/778437.pdf
Data publikacji:
2020
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
lemon peel
heavy metals
biosorption
FAAS
Opis:
Simultaneous adsorption of heavy metals in complex multi metal system is insuffnciently explored. This research gives results of key process parameters optimization for simultaneous removal of Cd(II), Co(II), Cr(III), Cu(II), Mn(II), Ni(II) and Pb(II) from aqueous solution (batch system). New lemon peel-based biomaterial was prepared and characterized by infrared spectroscopy with Fourier transformation (FTIR), scanning electron microscopy (SEM), electron dispersive spectroscopy (EDS), while the quantifi cation of metals was made by atomic absorption spectrometry (AAS). Simultaneous removal of seven metals ions was favorable at pH 5 with 300 mg/50 mL solidliquid phase ratio, within 60 min at room temperature with total obtained adsorption capacity of 46.77 mg g–1. Kinetic modeling showed that pseudo-second order kinetic and Weber-Morris diffusion models best describe the adsorption mechanism of all seven heavy metals onto lemon peel.
Źródło:
Polish Journal of Chemical Technology; 2020, 22, 1; 46-53
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biosorption of Chromium by Living Cells of Azotobacter s8, Bacillus subtilis and Pseudomonas aeruginosa using Batch System Reactor
Autorzy:
Kurniawan, Setyo Budi
Imron, Muhammad Fauzul
Purwanti, Ipung Fitri
Powiązania:
https://bibliotekanauki.pl/articles/123932.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
Azotobacter
Bacillus subtilis
bacteria
biosorption
Cr
Pseudomonas Putida
Opis:
Chromium in wastewater is classified as one of the dangerous contaminants that require further treatment before being discharged to water body. The concentration of chromium in water body, especially river, has increased as many industries utilize chromium as raw material and then discharge their wastewater without any treatment. Biosorption is one of methods that are widely used to treat heavy metal containing wastewater. Bacteria are the most common microorganisms to be used as heavy metal treatment agent. Azotobacter s8, Bacillus subtilis and Pseudomonas putida had been proven to have a heavy metal resistant capability. The screening test showed that Minimum Inhibitory Concentration (MIC) value of chromium for all bacteria ranged from 100 to 250 mg/L of CrCl3. The chromium biosorption test by bacteria showed that Azotobacter s8 was able to remove 10.53%, and Bacillus subtilis was able to remove 5.68% chromium from 50 mg/L initial concentration, while Pseudomonas putida showed no chromium removal. The chromium biosorption capacity by Azotobacter s8 was 580.08 mg/g and 349.30 mg/g for Bacillus subtilis.
Źródło:
Journal of Ecological Engineering; 2019, 20, 6; 184-189
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Removal of Hexavalent Chromium from Aqueous Solution by the Pod of Acacia gerrardii
Autorzy:
Abdulaziz, Mohammed A.
Bakri, Abdulrahman A.
Al-Zahrani, Saleh A.
Al-Zahrani, Majed S.
Al-Lehebi, Abdulrahman N.
Banjar, Fadil M.
Nabag, Mohand I.
Powiązania:
https://bibliotekanauki.pl/articles/779613.pdf
Data publikacji:
2019
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
Biosorption
chromium
Acacia gerrardii
isotherm models
Park kinetic models
Opis:
This study aims at investigating the potential of Acacia gerrardii pod for the removal of Cr(VI) in batch system. Effect of solution pH, biosorbent dosage, initial concentration of Cr(VI), contact time on the removal process was examined. Complete removal of hexavalent chromium was achieved at pH values 1.0 and 2.0 whereas maximum removal of total chromium was obtained at pH of 3.0. The study showed that the biosorption and bioreduction mechanisms were involved in the removal process. The time required for complete removal of Cr(VI) using the pod of Acacia gerrardii was shortened with an increase in biomaterial dosage and decrease in Cr(VI) concentration. Kinetic data was well described using Park kinetic model. Freundlich isotherm model adequately fitted the equilibrium data indication multilayer adsorption of total chromium on the surface of biomaterial. The pod of Acacia gerrardii could be used efficiently for the removal of hexavalent chromium from aqueous solutions.
Źródło:
Polish Journal of Chemical Technology; 2019, 21, 2; 14-19
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Removal of zinc, cadmium and nickel from mining waste leachate using walnut shells
Autorzy:
Ayala, Julia
Fernandez, Begona
Powiązania:
https://bibliotekanauki.pl/articles/208277.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
metal ions
adsorption
biosorption
adsorbent
kinetics
copper
jony metali
adsorpcja
biosorpcja
kinetyka
miedź
Opis:
The removal of heavy metals from aqueous solutions using walnut shells was investigated. The effects of pH, contact time, initial metal concentration, adsorbent concentration, and co-ions were studied in synthetic solutions. Metal uptake was found to be dependent on the initial pH of the solution; the removal rate increased upon increasing pH, showing the highest affinity at pH 5–7. The amount of metal removed improved with increasing initial concentration. Increasing adsorbent dosage enhanced removal efficiency, but reduced the amount absorbed per unit mass of walnut shells. The presence of co-ions suppressed the uptake of heavy metals, divalent ions having a more negative effect than monovalentions. The adsorption of Zn, Cd and Ni onto walnut shells was found to fit Langmuir and Freundlich isotherms. The results obtained in the tests with mining waste leachate showed the potential use of walnut shells for the removal of heavy metals.
Źródło:
Environment Protection Engineering; 2019, 45, 2; 141-158
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Możliwości zastosowania grzybów w technologiach oczyszczania i remediacji wybranych elementów środowiska
Possible applications of fungi in purification and environmental remediation technologies
Autorzy:
Kołwzan, B.
Adamiak, W.
Dziubek, A. M.
Powiązania:
https://bibliotekanauki.pl/articles/236820.pdf
Data publikacji:
2018
Wydawca:
Polskie Zrzeszenie Inżynierów i Techników Sanitarnych
Tematy:
environment purification
wastewater
soil
gases
toxic pollution
biodegradation
bioremediation
mycoremediation
biofiltration
decolorization
white rot fungi
ligninolytic
biofilm
xenobiotics
bioaccumulation
biosorption
oczyszczanie środowiska
ścieki
gleba
gazy
zanieczyszczenia toksyczne
biodegradacja
bioremediacja
mykoremediacja
biofiltracja
odbarwianie
grzyby białej zgnilizny
biofilm
ksenobiotyki
bioakumulacja
biosorpcja
Opis:
Grzyby wykazują wiele cech przydatnych w inżynierii środowiska, dających im przewagę nad bakteriami. Udowodniono, że potrafią one rozkładać wiele skomplikowanych związków organicznych, także ksenobiotyków, takich jak trudnobiodegradowalne wielopierścieniowe związki aromatyczne, polichlorowane węglowodory, dioksyny, pestycydy oraz pozostałości materiałów wybuchowych. Ważną rolę w naturalnej regulacji liczebności populacji roślin odgrywają pasożytnicze gatunki grzybów, a gatunki symbiotyczne są niezbędne do prawidłowego rozwoju i wzrostu wielu gatunków roślin. Ich różnorodność taksonomiczna, genetyczna i funkcjonalna jest ogromna i stanowi obszerne źródło organizmów użytecznych w procesie bioremediacji. W dokonanym przeglądzie piśmiennictwa wykazano, że różne gatunki grzybów mogą znaleźć zastosowanie w remediacji środowiska gruntowo-wodnego oraz w oczyszczaniu ścieków i gazów odlotowych. Jednakże dotychczasowe badania nad wykorzystaniem grzybów najczęściej były prowadzone w skali laboratoryjnej. Eksperymenty w skali półtechnicznej i polowej wykazały, że na obecnym etapie praktyczne wykorzystanie grzybów w systemach inżynierii środowiska nie jest ekonomicznie uzasadnione. Problemem, który wymaga rozwiązania jest utrzymanie dominacji szczepów grzybów o wysokiej aktywności degradacyjnej w otwartych układach oczyszczających w warunkach konkurencji ze strony mikroorganizmów autochtonicznych. Duże nadzieje wiąże się z jednoczesnym wykorzystaniem w układach oczyszczania środowiska grzybów i bakterii, których skuteczność biodegradacyjna może się wzajemnie uzupełniać. Aby w pełni wykorzystać specyficzne walory grzybów niezbędne są badania przesiewowe w celu izolacji szczepów o szerszych zdolnościach metabolicznych, a także udoskonalanie szczepów metodami in vitro. Podobnie przyszłościowe jest wykorzystanie w bioremediacji immobilizowanych enzymów grzybowych. Rozwój technik molekularnych pozwoli na zmniejszenie nadal jeszcze wysokich kosztów wytwarzania, oczyszczenia i immobilizacji enzymów na odpowiednich nośnikach.
Fungi possess many features useful to environmental engineering, which gives them an advantage over bacteria. Their ability to decompose many complex organic compounds, including xenobiotics, such as difficult to biodegrade polycyclic aromatic compounds, polychlorinated hydrocarbons, dioxins, pesticides and explosive residues has been documented. Parasitic fungi species play an important role as natural regulators of plant population size, while symbiotic species are essential to proper development and growth of many plant species. The enormous taxonomic, genetic and functional diversity of fungi constitutes a rich source of organisms useful in bioremediation process. The literature review demonstrated that various types of fungi could be employed in remediation of soil-water environment as well as in treatment of wastewater and waste gases. However, most often current studies on fungal applications are carried out on a laboratory scale. At the current stage, as demonstrated by semi-technical and field-scale experiments, practical use of fungi in environmental engineering systems is not economically justified. Maintenance of dominance of fungal strains with high degradation activity in open purification systems in competition with indigenous microorganisms remains an open problem. Great promises are held out for simultaneous use of fungal and bacterial environments in treatment systems, as their biodegradation effectiveness may complement each other. Improvement of strains by the in vitro methods and screening tests to isolate strains with broader metabolic abilities are necessary in order to take full advantage of the specific benefits of fungi. Similarly, use of immobilized fungal enzymes in bioremediation offers good prospects for the future. Development of molecular techniques will allow for reduction of persistently high costs of enzyme production, purification and immobilization on appropriate carriers.
Źródło:
Ochrona Środowiska; 2018, 40, 1; 3-20
1230-6169
Pojawia się w:
Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 58

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