Efficient Decontamination of Lead Ions from Wastewater by Salecan Polysaccharide-Based Hydrogels

被引：95

作者：

Qi, Xiaoliang ^{[1
,2
]}

Lin, Lei ^{[1
]}

Shen, Liangliang ^{[1
,2
]}

Li, Zhipeng ^{[1
,2
]}

Qin, Tao ^{[1
,2
]}

Qian, Yuna ^{[2
]}

Wu, Xuan ^{[2
]}

Wei, Xiong ^{[2
]}

Gong, Qianwen ^{[1
]}

Shen, Jianliang ^{[1
,2
]}

机构：

[1] Wenzhou Med Univ, Eye Hosp, Sch Ophthalmol & Optometry, Xueyuan West Rd, Wenzhou 325027, Peoples R China

[2] Chinese Acad Sci, Wenzhou Inst Biomat & Engn, Xinsan Rd, Wenzhou 32500, Peoples R China

来源：

ACS SUSTAINABLE CHEMISTRY & ENGINEERING | 2019年 / 7卷 / 12期

基金：

中国国家自然科学基金;

关键词：

Superabsorbent; Graft copolymerization; Salecan; Lead ions; Heavy metal removal Cite; HEAVY-METAL IONS; COMPOSITE HYDROGEL; ADSORPTION; REMOVAL; PB(II); CHITOSAN; ACID; ADSORBENT; EXCHANGE; LIGNIN;

D O I：

10.1021/acssuschemeng.9b02139

中图分类号：

O6 [化学];

学科分类号：

070301 [无机化学];

摘要：

Designing versatile adsorption materials with high efficiency, excellent reversibility, and economic production is vital for treating wastewater but remains challenging. Here, a new polysaccharide (salecan) based superabsorbent was developed by graft copolymerization of acrylamide and sodium vinylsulfonate onto the salecan and used to remove lead ions (Pb2+) from water. Effects of salecan content, adsorbent amount, contact time, adsorbate concentration, and pH on the extent of Pb(2+ )adsorption were studied. The optimized absorbent (containing 9 mL of 2% salecan polysaccharide) exhibited an optimal adsorption performance in Pb 2+ removal (172.8 mg/g). Noticeably, the adsorptive behavior of gel matched well with the Freundlich isotherm and pseudo-secondorder kinetic model. In addition, our product presented no apparent loss in Pb2+ adsorption after 6 cycles. Overall, this work not only provided a new strategy to construct highly efficient and low-cost adsorbent but also demonstrated its potential application for heavy metal removal.

引用

页码：11014 / 11023

页数：19

共 52 条

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Carbonization and ball milling on the enhancement of Pb(II) adsorption by wheat straw: Competitive effects of ion exchange and precipitation [J].