Regeneration of chitosan-based adsorbents used in heavy metal adsorption: A review

被引：403

作者：

Vakili, Mohammadtaghi ^{[1
,2
]}

Deng, Shubo ^{[2
]}

Cagnetta, Giovanni ^{[2
]}

Wang, Wei ^{[2
,3
]}

Meng, Pingping ^{[1
]}

Liu, Dengchao ^{[2
]}

Yu, Gang ^{[2
]}

机构：

[1] Yangtze Normal Univ, Green Intelligence Environm Sch, Chongqing 408100, Peoples R China

[2] Tsinghua Univ, State Key Joint Lab Environm Simulat & Pollut Con, Beijing Key Lab Emerging Organ Contaminants Contr, Sch Environm, Beijing 100084, Peoples R China

[3] Qinghai Univ, State Key Lab Plateau Ecol & Agr, Xining 810016, Qinghai, Peoples R China

来源：

SEPARATION AND PURIFICATION TECHNOLOGY | 2019年 / 224卷

关键词：

Chitosan adsorbent; Desorption; Desorption mechanism; Desorption parameter; Heavy metal; Regeneration; CROSS-LINKED CHITOSAN; AQUEOUS-SOLUTION; WASTE-WATER; COPPER II; ENHANCED ADSORPTION; EFFICIENT REMOVAL; CU(II) IONS; PB(II) IONS; POLY(VINYL ALCOHOL)/CHITOSAN; FUNCTIONALIZED CHITOSAN;

D O I：

10.1016/j.seppur.2019.05.040

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Adsorption of heavy metal ions on chitosan-based adsorbents has been extensively investigated. However, few studies explored the feasibility of desorbing and regenerating chitosan. Adsorbents used after adsorption of heavy metals are discarded, and this practice exacerbates the solid treatment problem. Regeneration and reuse of exhausted adsorbents should be considered to operate environment-friendly and cost-effective adsorption. This review was performed to summarize the desorption of heavy metal ions and possible regeneration of chitosan-based adsorbents using various desorption agents such as acids, alkalis, salts, and chelating agents. It was found that the highest desorption efficiencies obtained by acidic eluents. The percentage use of desorption agents for desorbing followed the order of acids (49.3%) > chelators (26.9%) > alkalis (14.9%) > salts (8.9%). Moreover, the proper desorption time were estimated to be 0.84 by 1.37 h. Beneficial information is provided for regeneration and recovery of chitosan adsorbents.

引用

页码：373 / 387

页数：15

共 139 条

[1] Magnetic chitosan modified with cysteine-glutaraldehyde as adsorbent for removal of heavy metals from water [J].