Pesticide residues have seriously damaged the natural environment and social security.Here,we prepared the efficient functional biochar(FB)for sulfonylurea herbicides from cotton straw cellulose(CSC)by hydrothermal ca...Pesticide residues have seriously damaged the natural environment and social security.Here,we prepared the efficient functional biochar(FB)for sulfonylurea herbicides from cotton straw cellulose(CSC)by hydrothermal carbonization with the methacrylic acid.The molecular simulation of FB indicated thatπ-πelectron-donor-acceptor(EDA)interaction and formation of charge-assisted H-bond were both the main factors for effective adsorption process.The adsorption process can match the pseudo-second-order kinetic equation and Freundlich model.The whole process is physical adsorption,spontaneous and rapid,and can quickly reach equilibrium.The FB with carbon-oxygen functional groups and aromatic conjugated structures can remove pesticides in water very quickly(within 30 s),with effective adsorption over 95%of Sulfonylurea herbicides(SUHs).Therefore,functional FB might be an effective way to get excellent absorbent for pesticide treatment.展开更多
基金This work was supported by the national key research and development program of China(2016YFD0201203)municipal innovative training program for college students of Beijing(2017Bj093)+2 种基金the special fund for agro-scientific research in the public interest(201203098)Beijing nova program interdisciplinary studies cooperative project(Z171100001117130)National Nature Science Foundation of China(21873115).
文摘Pesticide residues have seriously damaged the natural environment and social security.Here,we prepared the efficient functional biochar(FB)for sulfonylurea herbicides from cotton straw cellulose(CSC)by hydrothermal carbonization with the methacrylic acid.The molecular simulation of FB indicated thatπ-πelectron-donor-acceptor(EDA)interaction and formation of charge-assisted H-bond were both the main factors for effective adsorption process.The adsorption process can match the pseudo-second-order kinetic equation and Freundlich model.The whole process is physical adsorption,spontaneous and rapid,and can quickly reach equilibrium.The FB with carbon-oxygen functional groups and aromatic conjugated structures can remove pesticides in water very quickly(within 30 s),with effective adsorption over 95%of Sulfonylurea herbicides(SUHs).Therefore,functional FB might be an effective way to get excellent absorbent for pesticide treatment.