title: Carboxylmethyl konjac glucomannan conjugated polydopamine composites for Pb(II) removal.
abstract: Carboxylmethyl konjac glucomannan conjugated polydopamine (CMKGM-PDA) composite was successfully prepared using a cost-effective method. CMKGM-PDA exhibited excellent adsorption performance for the removal of Pb(II) and could be a convenient agent for recovery. The Langmuir linear model was suitable for describing the adsorption process of Pb(II). The maximum adsorption capacity was 95.24mgg-1at 298K, showing a high absorption capacity in comparison to similar absorbents. The pseudo-second order equation and intra-particle diffusion model exhibited good correlation with the adsorption kinetic. The thermodynamic values (ΔH0 > 0, ΔS0 > 0, ΔG0 < 0) indicated that the adsorption process of Pb(II) was endothermic, feasible, and spontaneous in nature. The chelation and electrostatic attraction between Pb(II) and -OH (or -NH2) groups on the CMKGM-PDA formed a possible adsorption mechanism.
authors.affiliation: Engineering Research Center of Biomass Materials, Ministry of Education, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China.
authors.forename: Pan-Pan
authors.initials: PP
authors.lastname: Chen
authors.affiliation: Engineering Research Center of Biomass Materials, Ministry of Education, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China. Electronic address: zhp1006@126.com.
authors.forename: Hong-Ping
authors.initials: HP
authors.lastname: Zhang
authors.affiliation: Engineering Research Center of Biomass Materials, Ministry of Education, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China.
authors.forename: Jianping
authors.initials: J
authors.lastname: Ding
authors.affiliation: Engineering Research Center of Biomass Materials, Ministry of Education, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China.
authors.forename: Xiao-Yan
authors.initials: XY
authors.lastname: Lin
authors.affiliation: Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China.
authors.forename: Xiong
authors.initials: X
authors.lastname: Lu
authors.affiliation: Key Laboratory for Ultrafine Materials of Ministry of Education East China University of Science and Technology, Shanghai 200237, China.
authors.forename: Changsheng
authors.initials: C
authors.lastname: Liu
authors.affiliation: Centre for NanoScale Science and Technology and School of Computer Science, Engineering and Mathematics, Flinders University, South Australia 5042, Australia. Electronic address: youhong.tang@flinders.edu.au.
authors.forename: Youhong
authors.initials: Y
authors.lastname: Tang
mesh_terms: D000327:Adsorption; D052918:Environmental Restoration and Remediation / Q000379:methods*; D007211:Indoles / Q000737:chemistry*; D007700:Kinetics; D007854:Lead / Q000302:isolation & purification*; D008351:Mannans / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D013816:Thermodynamics; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D007211:Indoles; D008351:Mannans; D011108:Polymers; D014874:Water Pollutants, Chemical; C568283:polydopamine; D007854:Lead; C022901:(1-6)-alpha-glucomannan
keywords: Adsorption mechanism; CMKGM; Lead; Polydopamine