石油化工高等学校学报2024，Vol.37Issue(2)：16-23,8.DOI:10.12422/j.issn.1006-396X.2024.02.003
钴铁层状双金属负载生物炭对水体硝氮的吸附研究
Study the Adsorption of Nitrate in Water by Cobalt-Iron Layered Bimetal-Loaded Biochar
摘要
Abstract
Rising levels of nitrate and nitrogen in water bodies pose a potential threat to aquatic ecosystems and human health.Therefore,it is urgent to solve the problem of excessive nitrate in water bodies.Fe(NO3)3·9H2O,Co(NO3)2·6H2O,reed biochar,NH3·H2O was used as raw material,and co-precipitation method was used to load cobalt-iron layered bimetals onto reed biochar to prepare Co/Fe-LDH@BC for adsorption of excess nitrate nitrogen in water.The experimental results showed that Co/Fe-LDH@BC could effectively adsorb nitrate nitrogen in water,and its adsorption capacity was 88.52 mg/g.The adsorption kinetic model conforms to the pseudo-second-order kinetic model,and the isotherm conforms to the Langmuir isotherm model,indicating that the adsorption reaction is spontaneous and endothermic,which mainly involves four reaction mechanisms:ion exchange,ligand exchange,electrostatic attraction and hydrogen bonding.In addition,Co/Fe-LDH@BC has a strong affinity for nitrate nitrogen in most water bodies where coexisting anions are present,making it suitable for practical applications.关键词
生物炭/钴铁层状双金属/硝氮/共沉淀/吸附Key words
Biochar/Cobalt-iron layered bimetal/Nitrate/Co-precipitation/Adsorption分类
化学化工引用本文复制引用
杨蕊铭,唐雅妮,李婧雯,费超,王博..钴铁层状双金属负载生物炭对水体硝氮的吸附研究[J].石油化工高等学校学报,2024,37(2):16-23,8.基金项目
辽宁省教育厅科学研究经费项目(LJKZ0382). （LJKZ0382）
