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Wyświetlanie 1-15 z 113
Tytuł:
Potential of Neptunia oleracea L. as a Phytoremediation Agent for Petroleum Liquid Waste
Autorzy:
Hardestyariki, Dwi
Fitria, Syarifa
Powiązania:
https://bibliotekanauki.pl/articles/24201771.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
sulfides
ammonia
phytoremediation
Neptunia oleracea
Opis:
This present study to determine the potential of Neptunia oleracea as a phytoremediation agent for petroleum liquid waste in terms of various parameters such as physical temperature, and chemical parameters, namely pH, sulfide, and ammonia. Crude oil liquid waste is a hazardous waste if discharged directly into the environment, especially water. In this research, a method of biological treatment of petroleum liquid waste was used by utilizing aquatic plants, namely Neptunia oleracea. Phytoremediation is a way to treat waste that still contains contaminants thus levels can be minimized and even accumulated by various types of plants. This phytoremediation technique uses a simple bioreactor with various concentrations of petroleum liquid waste, namely control (0% waste), 10% waste, 20% waste, and 30% waste. The results of this study can be seen that the Neptunia oleracea plant is able to survive in petroleum liquid waste with a treatment time of approximately 3 weeks. In testing the levels of ammonia and sulfide after treatment showed fluctuating results from week to week. This is a response from Neptunia oleracea which uses these compounds in its metabolic processes. The ability of Neptunia oleracea to reduce sulfide and ammonia levels indicates that this plant can be used as a phytoremediation agent for petroleum liquid waste.
Źródło:
Journal of Ecological Engineering; 2023, 24, 5; 88--94
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterization of FeCo based catalyst for ammonia decomposition. The effect of potassium oxide
Autorzy:
Lendzion-Bieluń, Zofia
Pelka, Rafał
Czekajło, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/778513.pdf
Data publikacji:
2014
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
ammonia decomposition
hydrogen
FeCo catalyst
Opis:
FeCo fused catalyst was obtained by fusing iron and cobalt oxides with an addition of calcium, aluminium, and potassium oxides (CaO, Al2O3, K2O). An additional amount of potassium oxide was inserted by wet impregnation. Chemical composition of the prepared catalysts was determined with an aid of the XRF method. On the basis of XRD analysis it was found that cobalt was built into the structure of magnetite and solid solution of CoFe2O4 was formed. An increase in potassium content develops surface area of the reduced form of the catalyst, number of adsorption sites for hydrogen, and the ammonia decomposition rate. The nitriding process of the catalyst slows down the ammonia decomposition.
Źródło:
Polish Journal of Chemical Technology; 2014, 16, 4; 111-116
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aspergillus niger, a dominant phylloplane coloniser, influences the activity of defense enzymes in Solanum lycopersicum
Autorzy:
Goswami, S.
Paul, P.K.
Sharma, P.D.
Powiązania:
https://bibliotekanauki.pl/articles/2084798.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Aspergillus niger
phylloplane
peroxidase
phenylalanine ammonia lyase
polyphenol oxidase
Solanum lycopersicum
tyrosine ammonia lyase
Opis:
Phylloplane microbes have been studied as strategic tools in management against plant pathogens. Non-pathogenic bacteria and fungi have been applied as crop protectants against various plant diseases. The present study aimed at evaluating the potentiality of Aspergillus niger spores in altering the activity of four key enzymes related to defense in tomato. The experiment was designed such that two groups of 50 tomato plants were considered: group 1 – sprayed with autoclaved distilled water (control) and group 2 – sprayed with A. niger spores. Spraying was carried out under aseptic conditions. The experimental parameters included analysis of the activity of peroxidase (POX), polyphenol oxidase (PPO), phenylalanine ammonia lyase (PAL) and tyrosine ammonia lyase (TAL) as well as expression of POX and PPO isoforms. The results demonstrated an inductive effect of A. niger on the activity of POX, PPO, PAL and TAL. Enhanced expression of POX and PPO isoforms was also observed. The results indicated that A. niger can be considered probiotic for the management of tomato against its phytopathogens.
Źródło:
Journal of Plant Protection Research; 2019, 59, 4; 512-518
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurement of ammonia emissions after slurry application to grassland: influence of application techniques
Autorzy:
Reitz, P.
Gallmann, E.
Kutzbach, H.D.
Powiązania:
https://bibliotekanauki.pl/articles/25687.pdf
Data publikacji:
1999
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
emission
ammonia nitrogen loss
grassland
ammonia
animal
slurry treatment
application technique
windtunnel system
organic fertilizer
Źródło:
International Agrophysics; 1999, 13, 1
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The importance of electroencephalography in the diagnosis of hepatic encephalopathy due to cirrhosis – a case report
Autorzy:
Fuksa, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/2075055.pdf
Data publikacji:
2022-06-30
Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Tematy:
ammonia
cirrhosis
electroencephalography
encephalopathy
triphasic waves
Opis:
Introduction and aim. Hepatic encephalopathy (HE) associated with cirrhosis of the liver is a neuropsychiatric syndrome, with symptoms ranging from barely detectable changes to deep coma. It frequently occurs in the form of episodes and relapses and can be triggered by external factors. HE severity is graded according to the West Haven criteria. The aim of the study is to draw attention to the ever-important and often key role of electroencephalography in the diagnosis of hepatic encephalopathy, even in today’s era of increasingly advanced diagnostic methods. Description of the case. A 57-year-old patient, professionally active at the time, was admitted to the hospital’s Neurology Department on an emergency basis due to difficulties with standing and moving, orientation disorders and limb tremor. Conclusion. While HE pathogenesis is multifactorial, the most important factors include increased brain exposure to ammonia, intestinal dysbiosis, and endotoxemia inducing a systemic inflammatory response. Patient observation, blood laboratory tests, neuropsychological tests and neurophysiological tests (EEG and evoked potentials) play an important role in establishing the diagnosis. Treatment and secondary prevention of hepatic encephalopathy include elimination of triggers and reduction of ammonia production and improvement of its metabolism.
Źródło:
European Journal of Clinical and Experimental Medicine; 2022, 2; 224-231
2544-2406
2544-1361
Pojawia się w:
European Journal of Clinical and Experimental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Studies of the Ammonia Decomposition over a Mixture Of α - Fe(N) And γ - Fe4n
Autorzy:
Kiełbasa, K.
Arabczyk, W.
Powiązania:
https://bibliotekanauki.pl/articles/779244.pdf
Data publikacji:
2013
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
catalytic ammonia decomposition
kinetics
iron catalyst
Opis:
An industrial pre-reduced iron catalyst for ammonia synthesis was nitrided in a differential reactor equipped with the systems that made it possible to conduct both the thermogravimetric measurements and hydrogen concentration analyser in the reacting gas mixture. The nitriding process, particularly the catalytic ammonia decomposition reaction, was investigated under an atmosphere of ammonia-hydrogen mixtures, under the atmospheric pressure, at 475oC. The nitriding potentials were changed gradually in the range from 19.10-3 to 73.10-3 Pa-0.5 in the reactor for an intermediate area where two phases exist simultanously: Fe(N) and γ’-Fe4. In the area wherein P > 73.10-3 Pa-0.5, approximately stoichiometric composition of γ’ - Fe4N phase exists and saturating of that phase by nitrogen started. The rate of the catalytic ammonia decomposition was calculated on the basis of grain volume distribution as a function of conversion degree for that catalyst. It was found that over γ’ - Fe4N phase in the stationary states the rate of catalytic ammonia decomposition depends linearly on the logarithm of the nitriding potential. The rate was decreasing along with increase in the nitriding potential. For the intermediate area, the rate of ammonia decomposition is a sum of the rates of reactions which occur on the surfaces of both Fe(N) and γ’ - Fe4N.
Źródło:
Polish Journal of Chemical Technology; 2013, 15, 1; 97-101
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The activity of fused-iron catalyst doped with lithium oxide for ammonia synthesis
Autorzy:
Jedrzejewski, R.
Lendzion-Bieluń, Z.
Arabczyk, W.
Powiązania:
https://bibliotekanauki.pl/articles/779518.pdf
Data publikacji:
2016
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
iron catalyst
ammonia synthesis
lithium oxide
Opis:
The iron catalyst precursor promoted with Al2O3, CaO, and Li2O was obtained applying the fusing method. Lithium oxide forms two phases in this iron catalyst: a chemical compound with iron oxide (Li2Fe3O4) and a solid solution with magnetite. The catalyst promoted with lithium oxide was not fully reduced at 773 K, while the catalyst containing potassium was easily reducible at the same conditions. After reduction at 873 K the activity of the catalyst promoted with lithium oxide was 41% higher per surface than the activity of the catalyst promoted with potassium oxide. The concentration of free active sites on the surface of the catalyst containing lithium oxide after full reduction was greater than the concentration of free active sites on the surface of the catalyst promoted with potassium oxide.
Źródło:
Polish Journal of Chemical Technology; 2016, 18, 2; 78-83
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Emission and distribution of ammonia from turkey farm
Emisja i rozprzestrzenianie amoniaku z fermy indyczej
Autorzy:
Słobodzian-Ksenicz, O.
Jasiewicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/396708.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
turkey farm
ammonia emission
extent of the impact of ammonia
ferma indycza
emisja amoniaku
zakres oddziaływania amoniaku
Opis:
The objective of the study was to determine the emissions of ammonia and the extent of its impact on the environment. On the farm there are two livestock buildings. The ammonia emission was calculated on the basis of the emission ratio per 1 m2 of the usable area of the building, for females determined at 1.38 kg per annum [9]. The volume of emission and the dispersion of ammonia was calculated at the height of 0.0 m and 6.5m above ground level with the KOMIN and RWW programs. Regardless of the height at which the calculation was done, the highest of the maximum concentrations was observed 16 m from the emitters situated in the roof ridge and 1 m from the emitters in the sidewall. The values of average annual concentrations and maximum 1-hour concentrations were higher for calculations at 0.0 m than 6.5 m. Within the area where the reference values were exceeded there is a compact rural residential area, whose west part is subject to very high above-standard ammonia concentrations much more frequently.
Celem pracy jest określenie emisji amoniaku i zasięgu jego oddziaływania na m2 powierzchni użytkowej budynku wynoszącym dla samic 1,38 kg rocznie [9]. Wielkości emisji i rozprzestrzenianie amoniaku wykonano dla wysokości 0,0 m i 6,5 m n.p.t. przy pomocy programów KOMIN i RWW. Niezależnie od wysokości obliczeń najwyższe ze stężeń maksymalnych wystąpiło 16 m od emitorów znajdujących się w kalenicy, oraz 1 m od emitorów w ścianie podłużnej. Maksymalne stężenia średnie roczne oraz stężenia maksymalne 1-godz były wyższe dla obliczeń na 0,0 m. niż na 6,5m. W zasięgu występowania przekroczeń wartości odniesienia znajduje się zwarta zabudowa a jej zachodnia część jest częściej narażona na oddziaływania bardzo wysokich ponadnormatywnych stężeń amoniaku. W obszarze występowania przekroczeń wartości dopuszczalnych nie powinny znajdować się budynki mieszkalne.
Źródło:
Civil and Environmental Engineering Reports; 2013, 11; 115-126
2080-5187
2450-8594
Pojawia się w:
Civil and Environmental Engineering Reports
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Properties and activity of the cobalt catalysts for NH3 &enspsynthesis obtained by co-precipitation – the effect of lanthanum addition
Autorzy:
Zybert, M.
Karasińska, M.
Truszkiewicz, E.
Mierzwa, B.
Raróg-Pilecka, W.
Powiązania:
https://bibliotekanauki.pl/articles/778653.pdf
Data publikacji:
2015
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
ammonia synthesis
cobalt catalyst
promoter
lanthanum
coprecipitation
Opis:
In modern research on catalysts for NH3&enspsynthesis a lot of attention is paid to cobalt. In this work the new catalytic systems based on cobalt are presented. Unsupported cobalt catalysts singly promoted (La or Ba) and doubly promoted (La and Ba) were prepared and tested in NH3&enspsynthesis reaction under commercial synthesis conditions. Characterization studies revealed that lanthanum plays a role of a structural promoter, which improves the surface of catalyst precursors and prevents from sintering during calcination. However, lanthanum has a negative effect on the reduction of cobalt oxide, but the addition of barium promoter (Co/La/Ba catalyst) diminishes the negative impact of La. The co-promotion of cobalt with lanthanum and barium results in the increasing of the active phase surface and improvement of its activity in NH3&enspsynthesis.
Źródło:
Polish Journal of Chemical Technology; 2015, 17, 1; 138-143
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamics of Nitrogen and Phosphorus Forms Content in Dojlidy Retention Reservoir
Autorzy:
Oszczapińska, K.
Skoczko, I.
Szczykowska, J.
Powiązania:
https://bibliotekanauki.pl/articles/123705.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
water pollution
nitrate nitrogen
ammonia nitrogen
phosphates
Opis:
The Dojlidy Ponds, which include Dojlidy water dam, are located within Bialystok city limits in Podlasie area, Poland. The reservoir with a water surface of 34 ha and average depth of 1.75 m was constructed in 1962 as a result of Biala River damming. The researches were conducted in July, October and December 2014 as well as in March 2015. Each time five test samples were collected from spots located along the reservoir. Water samples were tested for the presence of ammonia nitrogen, nitrite nitrogen, organic nitrogen, phosphates and organic phosphorus. The values of nutrient indicators exhibited high variability during the study period. The highest concentration of nitrite and nitrate nitrogen were observed in July, while the lowest in October – nitrite nitrogen, and in December – nitrate nitrogen. Different situation was observed after the analysis of phosphorus forms – the highest concentrations of organic phosphorus and phosphates were observed in December and the lowest in July. Relatively high concentrations of nitrogen and phosphorus forms identified in water samples were most likely caused by tributaries, due to the pollution from the reservoir catchment. Technical parameters of the object and location of the reservoir have undoubtedly an impact on the tested parameters contents.
Źródło:
Journal of Ecological Engineering; 2017, 18, 1; 147-153
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effectiveness of the use of urease inhibitors in agriculture: a review
Autorzy:
Matczuk, D.
Siczek, A.
Powiązania:
https://bibliotekanauki.pl/articles/2083072.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
soil urease
urea
urease inhibitors
ammonia
volatilization
Opis:
Urea is one of the most popular fertilizers in the world. In 2018, the global production capacity of urea reached the level of 210 million metric tonnes. Due to the fact that the world population is growing steadily, the demand for food is increasing, and thus also the consumption of urea. The use of urea-based fertilizers has negative consequences in the form of ammonia volatilization. The solution to this problem may be the use of urease inhibitors. Currently, inhibitors of synthetic origin are available on the market, while the use of inhibitors of natural origin is still being under trial. The use of the most commonly used urease inhibitor – NBPT together with urea causes a reduction in ammonia emissions and has a beneficial effect on crop productivity. At the same time, the search for inhibitors of natural origin is underway, which, apart from reducing ammonia volatilization into the atmosphere, could have a positive effect on crop yields. In this paper, recent advances in this field are reviewed.
Źródło:
International Agrophysics; 2021, 35, 2; 197-208
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ammonia as a sustainable fuel
Amoniak jako zrównoważone paliwo
Autorzy:
Grzesiak, D.
Kędzior, R.
Popławski, D.
Hałat, A.
Falewicz, P.
Powiązania:
https://bibliotekanauki.pl/articles/388585.pdf
Data publikacji:
2015
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
ammonia flammability
burning ammonia-air mixtures
laminar burning velocity
palność amoniaku
spalanie mieszanki amoniak-powietrze
prędkość spalania laminarnego
Opis:
An ammonia evaluation as a potential sustainable fuel in comparison with other fuels was made. Values of laminar burning velocity ammonia at ambient and elevated temperatures 20, 100, 200, 250 oC and pressure 100 and 500 kPa using the data from SAFEKINEX project were estimated.
W pracy dokonano oceny przydatności amoniaku jako potencjalnego paliwa w odniesieniu do paliw konwencjonalnych. Wykorzystując dane z projektu SAFEKINEX, oszacowano także wartości prędkości spalania laminarnego amoniaku w temperaturze 20, 100, 200, 250 oC przy ciśnieniu 100 i 500 kPa.
Źródło:
Ecological Chemistry and Engineering. A; 2015, 22, 3; 393-401
1898-6188
2084-4530
Pojawia się w:
Ecological Chemistry and Engineering. A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fogging low concentrated organic acid in a fattening pig unit - effect on animal health and microclimate
Autorzy:
Stein, Heiko
Schulz, Jochen
Kemper, Nicole
Tichy, Alexander
Krauss, Ines
Knecht, Christian
Hennig-Pauka, Isabel
Powiązania:
https://bibliotekanauki.pl/articles/991139.pdf
Data publikacji:
2016
Wydawca:
Instytut Medycyny Wsi
Tematy:
fattening pigs
disinfection
fogging
tartaric acid
dust
ammonia
Opis:
Introduction and objective. In intensive pig production aerial contaminates are potential hazards for the health of animals and humans. In this study, the effect of fogging a low concentrated tartaric acid solution on pigs’ health, environmental and hygiene parameters were evaluated in an inhabited fattening unit. Materials and method. Pigs were housed in separate units (control group n=109 and experimental group n=110). During the whole fattening period, twice a week at 48 hour intervals, a 0.1% tartaric acid solution was aerosolized by a coldfogging system for 20 minutes in the experimental unit. Environmental parameters were spot-checked on days of fogging. Sedimentation dust and surfaces were analysed for bacterial and fungal load. Dust particle size distribution was assessed. Pigs were clinically examined weekly. Standard meat examination at an abattoir was extended by individual quantification of lung alterations. Results. The fogging procedure had no influence on ammonia concentrations. A significant reduction of mould, but not of bacteria, was found in sedimentation dust, and bacterial and mould scores of surface samples were improved. A significant reduction of particle size classes 1.6–2.0 μm, 4.0–5.0 μm, 7.5–10 μm, as well as 10–15 μm was observed. The high sound level of the fogging machine (82–102 dB) led to higher activity and pen-mate directed behaviour. More skin alterations, conjunctivitis and sneezing were recorded in the experimental group. Gross pathological lung alterations did not differ between both groups. Conclusions. Although fogging of tartaric acid is limited to a concentration of 0.1% due to its irritating effect on the respiratory mucosa, reduction of microbial load can be achieved, but it would be enhanced by using more powerful fogging systems.
Źródło:
Annals of Agricultural and Environmental Medicine; 2016, 23, 4
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The welfare of horses assessed by the zoohygienic inventory method
Dobrostan koni oceniony metodą inwentaryzacji zoohigienicznej
Autorzy:
Kosla, T.
Porowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/2637.pdf
Data publikacji:
2013
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
welfare
horse
assessment
zoohygienic inventory
ventilation
ammonia concentration
Opis:
The performed investigations aimed at assessing the welfare of horses in accordance with the rules and methods of zoohygienic inventory. The investigations were performed and the measurements taken at the Wolica riding complex of Warsaw University of Life Sciences. The basic parameters creating the microclimate were evaluated in the research described in the paper "The welfare of horses assessed by the investigations of chosen parameters of the stable microclimate" published in the present issue of Animal Science. Using the rules and methods of zoohygienic inventory the current paper presents the farm buildings, their equipment, ventilation system and closest surroundings in which the horses are kept. The investigations included the concentration of ammonia in the stables, to demonstrate the effectiveness of drains and ventilation. The obtained results were compared with the binding standards. The obtained results show that the parameters agree with zoohygienic recommendations and exceed the standards only sporadically. The welfare of animals was maintained.
Dobrostan koni oceniony metodą inwentaryzacji zoohigienicznej. Celem przeprowadzonych badań była ocena dobrostanu koni zgodnie z zasadami i metodyką inwentaryzacji zoohigienicznej. Badania i pomiary przeprowadzono na terenie kompleksu hippicznego Wolica SGGW. Podstawowe parametry tworzące mikroklimat oceniono w „Dobrostan koni oceniony z wykorzystaniem badań wybranych parametrów mikroklimatu stajni" opublikowanym w aktualnym numerze Animal Science. W niniejszej pracy, postępując zgodnie z zasadami i metodyką inwentaryzacji zoohigienicznej, opisano budynki inwentarskie, ich wyposażenie, system wentylacji i najbliższe otoczenie, w którym utrzymywane były konie. Zbadano stężenie amoniaku w pomieszczeniach, a otrzymane wyniki zestawiono z obowiązującymi normami. Uzyskane wyniki wskazują, iż badane elementy środowiska koni były zgodne z zaleceniami zoohigieny i tylko sporadycznie przekraczają normy. Dobrostan pod tym względem był zachowany.
Źródło:
Annals of Warsaw University of Life Sciences - SGGW. Animal Science; 2013, 52
1898-8830
Pojawia się w:
Annals of Warsaw University of Life Sciences - SGGW. Animal Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Indonesias Natural Zeolite as an Adsorbent for Toxic Gases in Shrimp Ponds
Autorzy:
Anggoro, Didi Dwi
Sumantri, Indro
Buchori, Luqman
Powiązania:
https://bibliotekanauki.pl/articles/1838278.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
shrimp pond water
adsorption
zeolite
ammonia
hydrogen sulphide
Opis:
The objective of this research was to produce safe water for shrimp by using zeolite as adsorbent to absorb unwanted substances (NH3 and H2S). In particular, this study also aimed to design the shrimp pond water treatment equipment, effect of flow rate on zeolite ability to absorb toxic gases (NH3 and H2S), and rate of absorption (K) and reaction (k). The adsorbent is zeolite which has adsorption properties, high surface area and pores suitable for water (3Å). Then, the concentration of ammonia, hydrogen sulfide was analyzed using Ammonia Test Kit and Hydrogen Sulphide of Hach Hydrogen Sulfide Test Kit. The materials used in this study were zeolite of Malang (East Java, Indonesia) and shrimp pond water. The best result of NH3 and H2S adsorption obtained at a flow rate of 3 L•min-1. The best adsorption constant value (K) achieved by a flow rate of 3 L•min-1. On the basis of the best value of R2, NH3 and H2S adsorption, it can be classified in the first-order kinetic model with R2 of 0.9763 and a k value of 0.0007 hours-1 with a flow rate of 6 L•min-1. From the data above, it can be calculated that the adsorbent needed in the adsorption of NH3 and H2S in a scale shrimp pond requires 18 kg of Malang zeolite with a column height of 3.62 m of adsorbent, a diameter of 2.07 m, and a column volume of 12.21 m3.
Źródło:
Journal of Ecological Engineering; 2021, 22, 6; 202-208
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
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