title: Environmentally friendly chitosan/PEI-grafted magnetic gelatin for the highly effective removal of heavy metals from drinking water.
abstract: The development of environmentally friendly sorbents with a high adsorption capacity is an essential problem in the removal of heavy metals from drinking water. In this study, magnetic gelatin was prepared using transglutaminase as a cross-linker, which could only catalyze an acyl-transfer reaction between lysine and glutamine residues of the gelatin and not affect other amino groups. Therefore, it was beneficial for the further modification based on the amino groups, and did not affect the spatial structure of gelatin, which can effectively prevent the embedding of active sites in the polymer matrix. After modification with the chitosan/polyethylenimine copolymers, the numbers of amino groups was greatly increased, and the magnetic composites exhibited a high adsorption capacity, excellent water compatibility and simple magnetic separation. The adsorption capacities of lead and cadmium were 341 mg g-1and 321 mg g-1, respectively, which could be used for the removal of metal ions in drinking water.
authors.affiliation: State Key Laboratory of Environment Health (Incubation), Key Laboratory of Environment and Health, Ministry of Education, Key Laboratory of Environment and Health (Wuhan), Ministry of Environmental Protection, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, #13 Hangkong Road, Wuhan, Hubei, 430030, China.
authors.forename: Bingbing
authors.initials: B
authors.lastname: Li
authors.affiliation: State Key Laboratory of Environment Health (Incubation), Key Laboratory of Environment and Health, Ministry of Education, Key Laboratory of Environment and Health (Wuhan), Ministry of Environmental Protection, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, #13 Hangkong Road, Wuhan, Hubei, 430030, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Zhou
authors.affiliation: State Key Laboratory of Environment Health (Incubation), Key Laboratory of Environment and Health, Ministry of Education, Key Laboratory of Environment and Health (Wuhan), Ministry of Environmental Protection, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, #13 Hangkong Road, Wuhan, Hubei, 430030, China.
authors.forename: Kai
authors.initials: K
authors.lastname: Huang
authors.affiliation: Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China.
authors.forename: Yipei
authors.initials: Y
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Environment Health (Incubation), Key Laboratory of Environment and Health, Ministry of Education, Key Laboratory of Environment and Health (Wuhan), Ministry of Environmental Protection, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, #13 Hangkong Road, Wuhan, Hubei, 430030, China.
authors.forename: Surong
authors.initials: S
authors.lastname: Mei
authors.affiliation: State Key Laboratory of Environment Health (Incubation), Key Laboratory of Environment and Health, Ministry of Education, Key Laboratory of Environment and Health (Wuhan), Ministry of Environmental Protection, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, #13 Hangkong Road, Wuhan, Hubei, 430030, China.
authors.forename: Yikai
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: State Key Laboratory of Environment Health (Incubation), Key Laboratory of Environment and Health, Ministry of Education, Key Laboratory of Environment and Health (Wuhan), Ministry of Environmental Protection, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, #13 Hangkong Road, Wuhan, Hubei, 430030, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Jing
mesh_terms: D000327:Adsorption; D002614:Chelating Agents / Q000378:metabolism*; D048271:Chitosan / Q000378:metabolism*; D060766:Drinking Water / Q000737:chemistry*; D005780:Gelatin / Q000378:metabolism*; D008280:Magnetics; D019216:Metals, Heavy / Q000302:isolation & purification*; D011094:Polyethyleneimine / Q000378:metabolism*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification; D018508:Water Purification / Q000379:methods*
chemical_list: D002614:Chelating Agents; D060766:Drinking Water; D019216:Metals, Heavy; D014874:Water Pollutants, Chemical; D005780:Gelatin; D011094:Polyethyleneimine; D048271:Chitosan