title: Fabrication of Novel Magnetic Nanoparticles of Multifunctionality for Water Decontamination.
abstract: Efficient and powerful water purifiers are in increasing need because we are facing a more and more serious problem of water pollution. Here, we demonstrate the design of versatile magnetic nanoadsorbents (M-QAC) that exhibit excellent disinfection and adsorption performances at the same time. The M-QAC is constructed by a Fe3O4 core surrounded by a polyethylenimine-derived corona. When dispersed in water, the M-QAC particles are able to interact simultaneously with multiple contaminants, including pathogens and heavy metallic cations and anions, in minutes. Subsequently, the M-QACs along with those contaminants can be easily removed and recollected by using a magnet. Meanwhile, the mechanisms of disinfection are investigated by using TEM and SEM, and the adsorption mechanisms are analyzed by XPS. In a practical application, M-QACs are applied to polluted river water 8000-fold greater in mass, producing clean water with the concentrations of all major pollutants below the drinking water standard of China. The adsorption ability of M-QAC could be regenerated for continuous use in a facile manner. With more virtues, such as low-cost fabrication and easy scaling up, the M-QAC have been shown to be a very promising multifunctional water purifier with rational design and to have great potential for real water purification applications.
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University , Nanjing 210023, P.R. China.
authors.forename: Xiaolin
authors.initials: X
authors.lastname: Zhang
authors.affiliation: School of Environmental and Biological Engineering, Nanjing University of Science and Technology , Xiao Ling Wei 200, Nanjing, 210094, P.R. China.
authors.forename: Jieshu
authors.initials: J
authors.lastname: Qian
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University , Nanjing 210023, P.R. China.
authors.forename: Bingcai
authors.initials: B
authors.lastname: Pan
mesh_terms: D000327:Adsorption; D002681:China; D004203:Disinfection / Q000379:methods*; D008280:Magnetics; D058185:Magnetite Nanoparticles; D019216:Metals, Heavy / Q000302:isolation & purification; D011094:Polyethyleneimine; D000644:Quaternary Ammonium Compounds; D045483:Rivers; D014867:Water; D014874:Water Pollutants, Chemical / Q000302:isolation & purification; D018508:Water Purification
chemical_list: D058185:Magnetite Nanoparticles; D019216:Metals, Heavy; D000644:Quaternary Ammonium Compounds; D014874:Water Pollutants, Chemical; D014867:Water; D011094:Polyethyleneimine