title: Recycled chitosan nanofibril as an effective Cu(II), Pb(II) and Cd(II) ionic chelating agent: adsorption and desorption performance.
abstract: Mechanically disassembled chitosan nanofibrils were prepared and used as metal ion chelating agents. Structure and morphology of nanofibrils were investigated and ionic adsorption or desorption performance were validated to establish related fitting models. In single metal ion solution, the saturated adsorption capacities of Cu(II), Pb(II), Cd(II), Zn(II), and Ni(II) were 168.66, 118.00 and 60.85, 143.67, and 63.32 mg/g, respectively. In ternary metal ion solution, Cu(II) was more competitive to be adsorbed than Pb(II) and Cd(II) and its removal could arrive at 60%. Ions adsorbed by nanofibrils could be released by EDTA and the recovery could keep above 70% after 3 sorption-desorption cycles. Hence, renewable and recyclable nanofibrillar chitosan exhibited a great promising application in metal treatments attributed to its high adsorption capacity and chelation efficiency.
authors.affiliation: Department of Chemistry, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing University of Information Science & Technology, Nanjing 210044, China. Electronic address: dagangliu@gmail.com.
authors.forename: Dagang
authors.initials: D
authors.lastname: Liu
authors.affiliation: Department of Chemistry, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing University of Information Science & Technology, Nanjing 210044, China.
authors.forename: Zehui
authors.initials: Z
authors.lastname: Li
authors.affiliation: Department of Chemistry, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing University of Information Science & Technology, Nanjing 210044, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Zhu
authors.affiliation: Department of Chemistry, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing University of Information Science & Technology, Nanjing 210044, China.
authors.forename: Zhenxuan
authors.initials: Z
authors.lastname: Li
authors.affiliation: Department of Applied Chemistry, Birla Institute of Technology, Mesra, Patna Campus, Patna 800014, India.
authors.forename: Rakesh
authors.initials: R
authors.lastname: Kumar
mesh_terms: D000327:Adsorption; D002104:Cadmium / Q000302:isolation & purification; D002614:Chelating Agents / Q000737:chemistry*; D048271:Chitosan / Q000737:chemistry*; D003300:Copper / Q000302:isolation & purification; D007854:Lead / Q000302:isolation & purification; D019216:Metals, Heavy / Q000302:isolation & purification*; D057139:Nanofibers / Q000737:chemistry* / Q000648:ultrastructure; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification
chemical_list: D002614:Chelating Agents; D019216:Metals, Heavy; D014874:Water Pollutants, Chemical; D002104:Cadmium; D007854:Lead; D003300:Copper; D048271:Chitosan
keywords: Adsorption; Chitosan nanofibrils; Desorption; Metal ions