Effect of H2O2 concentrations on copper removal using the modified hydrothermal biochar

被引：106

作者：

Zuo, XiaoJun ^{[1
]}

Liu, Zhengang ^{[2
]}

Chen, MinDong ^{[1
]}

机构：

[1] Nanjing Univ Informat Sci & Technol, Sch Environm Sci & Engn, Nanjing 210044, Jiangsu, Peoples R China

[2] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, 18 Shuangqing Rd, Beijing 100085, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2016年 / 207卷

关键词：

Sorption; Copper; Hydrothermal biochar; H2O2; Carboxylic group; AQUEOUS-SOLUTION; HYDROGEN-PEROXIDE; HEAVY-METALS; ADSORPTIVE REMOVAL; ACTIVATED CARBONS; CARBONIZATION; CU(II); WATER; DEGRADATION; MECHANISMS;

D O I：

10.1016/j.biortech.2016.02.032

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

This study investigated effect of H2O2 concentrations on copper removal using H2O2 modified hydrothermal carbonization Cymbopogon schoenanthus L. Spreng (HLG). Sorption behaviors of Cu (II) on the modified HLG by 20% H2O2 (mHLG2) could be the most desirable. Based on Langmuir isotherm, the maximum amount of Cu (II) uptake was in the sequence of mHLG2 (53.8 mg g (1)) > mHLG1 (44.2 mg g (1)) > mHLG3 (42.0 mg g (1)) > mHLG0 (35.8 mg g (1)), which was higher than the results from majority of previous studies, suggesting that H2O2 modification advanced sorption capacity of hydrothermal biochars evidently. Effect mechanisms exploration indicated that the difference of Cu (II) removal by biochars before and after the modification was mainly related to functional groups. Carboxylic group was responsible for the best sorption property of Cu (II) by mHLG2, which was attributed to its significant relationships with H2O2 modification and Cu (II) removal. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：262 / 267

页数：6

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