Carboxylmethyl konjac glucomannan conjugated polydopamine composites for Pb(II) removal

被引：54

作者：

Chen, Pan-pan ^{[1
]}

Zhang, Hong-ping ^{[1
]}

Ding, Jianping ^{[1
]}

Lin, Xiao-yan ^{[1
]}

Lu, Xiong ^{[2
]}

Liu, Changsheng ^{[3
]}

Tang, Youhong ^{[4
,5
]}

机构：

[1] Southwest Univ Sci & Technol, Engn Res Ctr Biomass Mat, Sch Mat Sci & Engn, Minist Educ, Mianyang 621010, Sichuan, Peoples R China

[2] Southwest Jiaotong Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Adv Technol Mat, Chengdu 610031, Sichuan, Peoples R China

[3] East China Univ Sci & Technol, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China

[4] Flinders Univ S Australia, Ctr NanoScale Sci & Technol, Bedford Pk, SA 5042, Australia

[5] Flinders Univ S Australia, Sch Comp Sci Engn & Math, Bedford Pk, SA 5042, Australia

来源：

CARBOHYDRATE POLYMERS | 2017年 / 162卷

基金：

中国国家自然科学基金;

关键词：

CMKGM; Polydopamine; Lead; Adsorption mechanism; HEAVY-METAL IONS; MUSSEL-INSPIRED SYNTHESIS; AQUEOUS-SOLUTION; ADSORPTION BEHAVIOR; COPPER REMOVAL; WASTE-WATER; NANOPARTICLES; ADSORBENTS; MECHANISM; CHITOSAN;

D O I：

10.1016/j.carbpol.2017.01.048

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Carboxylmethyl konjac glucomannan conjugated polydopamine (CIVIKGM-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 95.24 mg g(-1) at 298 K, 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 (Delta HO>0, Delta SO>0, Delta GO<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. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：62 / 70

页数：9

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