High-efficiency removal of Cr(VI) by modified biochar derived from glue residue

被引：110

作者：

Shi, Yueyue ^{[1
,3
,4
,5
]}

Shan, Rui ^{[1
,2
,3
,4
]}

Lu, Lili ^{[1
]}

Yuan, Haoran ^{[1
,2
,3
,4
]}

Jiang, Hong ^{[6
]}

Zhang, Yuyuan ^{[7
]}

Chen, Yong ^{[1
,2
,3
,4
]}

机构：

[1] Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China

[2] Southern Marine Sci & Engn Guangdong Lab Guangzho, Guangzhou 511458, Peoples R China

[3] CAS Key Lab Renewable Energy, Guangzhou 510640, Peoples R China

[4] Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China

[5] Univ Sci & Technol China, Nano Sci & Technol Inst, Suzhou 215123, Peoples R China

[6] Univ Sci & Technol China, Dept Chem, Hefei 230026, Peoples R China

[7] Foshan Univ, Coll Mat Sci & Energy Engn, Foshan 528000, Guangdong, Peoples R China

来源：

JOURNAL OF CLEANER PRODUCTION | 2020年 / 254卷

基金：

中国国家自然科学基金;

关键词：

Glue residue; Modified biochar; Cr(VI) removal; Adsorption mechanism; HEXAVALENT CHROMIUM REMOVAL; HUMAN HEALTH-RISK; ACTIVATED CARBON; AQUEOUS-SOLUTION; OPERATING-CONDITIONS; WASTE-WATER; ADSORPTION; MECHANISMS; SHELL; NANOSHEETS;

D O I：

10.1016/j.jclepro.2019.119935

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A series of cost-effective, high-efficiency and sustainable adsorbent for Cr(VI) were prepared from waste glue residue. Considering that chemical modification has great influence on the properties of biochar, several modifiers (HCl, KOH, and ZnCl2) were used to improve the adsorption capacity of biochar. Besides that, the effect of prepare conditions (i.e., pyrolysis temperature and impregnation ratio of modifier and glue residue) were also investigated. Emission scanning electron microscopy, transmission electron microscopy, X-ray diffractometer, X-ray photoelectron spectroscopy and Autosorb1-MP Quantachrome were used to characterize the physicochemical properties of waste glue residue biochar. Reaction time, solution pH, adsorbent dosage, and initial adsorbate concentration on contaminant removal were also examined. The maximum sorption capacity of ZnCl2 modified glue residue biochar reached 325.54 mg/g, which is higher than previous reported adsorbents. The recycling experiment demonstrated that the removal efficiency of the optimal biochar was 90% after six cycles. Hence, waste glue residue exhibits a great potential in Cr(VI) contaminated water's management. (C) 2020 Elsevier Ltd. All rights reserved.

引用

页数：12

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