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ammonium-nitrogen removal from aqueous solution using municipal green waste wood biochars
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نویسنده
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ndibize wilson e. ,hossain md nuralam ,hongyan nan ,salam muhammad ,mian md. manik ,sarker md. eusuf ,shojib md rokebul islam
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منبع
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advances in environmental technology - 2022 - دوره : 8 - شماره : 1 - صفحه:15 -29
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چکیده
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Ammonium (nh4+), one of the most common types of reactive form of nitrogen in wastewater, can cause eutrophication and other environmental problems if released into waterways. this study was conducted to understand nh4+ adsorption mechanism of wood biochar from municipal green waste in an aqueous environment and the factors affecting nh4+ removal. the biochars were produced by pyrolyzing green wood waste at 300°c (wb300), 450°c (wb400), and 600°c (wb600), respectively. biochar dosage, ph, and contact duration were studied during nh4+ adsorption studies to see how these variables affected the adsorption process. the adsorption process was studied using isotherms and kinetic adsorption models. the batch equilibrium and kinetic studies at 25°c, ph 7, and a contact duration of 240 minutes showed that the wb450 dosage of 0.2 g/l removed the most (nh4+-n) compared to wb600 and wb300. wb450 had higher affinity values and a maximum adsorption capacity of 2.34 mg/g; the ‘freundlich isotherm’ model had a better fit to the equilibrium experimental data, indicating that heterogeneous sorption was preferable to monolayer sorption. chemisorption was the dominant (nh4+) adsorption method, as demonstrated by the ‘pseudo-second-order’ kinetic model with an r² of 0.99. the study concludes that municipal green wood waste-based biochar can be efficient absorbents for nh4+ removal from wastewater. also, the removal efficiency can be optimized by selecting different feedstocks or the pyrolysis condition for biochar production.
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کلیدواژه
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ammonium nitrogen ,adsorption process. municipal green waste ,slow pyrolysis ,wood biochar
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آدرس
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ministry of education, chongqing university, national center for international research of low-carbon and green buildings, school of environment and ecology, key laboratory of three gorges reservoir region’s eco-environment, china, ministry of education, chongqing university, national center for international research of low-carbon and green buildings, school of environment and ecology, key laboratory of three gorges reservoir region’s eco-environment, china, ministry of education, chongqing university, key laboratory of three gorges reservoir region’s eco-environment, china. shanghai jiao tong university, school of environmental science and engineering, china, ministry of education, chongqing university, national center for international research of low-carbon and green buildings, school of environment and ecology, key laboratory of three gorges reservoir region’s eco-environment, china, university of science and technology of china, school of earth and space sciences, cas key laboratory of crust-mantle materials and the environments, china, mawlana bhashani science and technology university, department of environmental science and resource management, bangladesh, chongqing university, department of mechanical engineering, china
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پست الکترونیکی
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rokebul707@gmail.com
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Authors
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