Facile One-Pot Synthesis of Sustainable Carboxymethyl Chitosan - Sewage Sludge Biochar for Effective Heavy Metal Chelation and Regeneration

被引：131

作者：

Ifthikar, Jerosha ^{[1
]}

Jiao, Xiang ^{[1
]}

Ngambia, Audrey ^{[1
]}

Wang, Ting ^{[1
]}

Khan, Aimal ^{[1
]}

Jawad, Ali ^{[1
,2
]}

Xue, Qiang ^{[3
]}

Liu, Lei ^{[3
]}

Chen, Zhuqi ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Hubei Key Lab Mat Chem & Serv Failure, Key Lab Mat Chem Energy Convers & Storage, Minist Educ,Sch Chem & Chem Engn, Wuhan 430074, Hubei, Peoples R China

[2] Huazhong Univ Sci & Technol, Sch Environm Sci & Engn, Dept Environm Engn, Wuhan 430074, Hubei, Peoples R China

[3] Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2018年 / 262卷

基金：

中国国家自然科学基金;

关键词：

Sewage sludge biochar; Carboxymethyl chitosan; Adsorption; Mercury; Lead; HIGHLY EFFICIENT; AQUEOUS-SOLUTIONS; SELECTIVE REMOVAL; MERCURY IONS; WASTE-WATER; LEAD; COMPOSITE; ADSORPTION; SORPTION; PB(II);

D O I：

10.1016/j.biortech.2018.04.053

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

In this paper, sewage sludge, a solid waste from wastewater treatment plant, which eagerly requires proper treatment was reused as solid support in the form of sewage sludge biochar, then modified with carboxymethyl chitosan to form a bio-adsorbent. Further, carboxymethyl chitosan coating on sewage sludge biochar improved carboxymethyl chitosan's stability in water. The prepared bio-adsorbent revealed a shorter equilibrium time (< 60 min) for Pb(II) adsorption and a superior capacity of 594.17 mg g(-1) for Hg(II) adsorption, which are so far the best recorded performance achieved for chitosan based adsorbents. Additionally, the adsorbent was highly selective for heavy metal ions and it also presented a good stability and reusability for industrial applications. These outcomes demonstrate waste valorization through a green, facile and one-pot approach that turns the solid waste of sewage sludge into biochar adsorbent with propitious applications in the elimination of heavy metal ions from wastewater.

引用

页码：22 / 31

页数：10

共 48 条

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