Removal of lead, copper, cadmium, zinc, and nickel from aqueous solutions by alkali-modified biochar: Batch and column tests

被引：269

作者：

Ding, Zhuhong ^{[1
,3
]}

Hu, Xin ^{[2
,3
]}

Wan, Yongshan ^{[4
]}

Wang, Shengsen ^{[3
]}

Gao, Bin ^{[3
]}

机构：

[1] Nanjing Tech Univ, Sch Environm, Nanjing 211816, Jiangsu, Peoples R China

[2] Nanjing Univ, Ctr Mat Anal, State Key Lab Analyt Chem Life Sci, Nanjing 210093, Jiangsu, Peoples R China

[3] Univ Florida, Dept Agr & Biol Engn, Gainesville, FL 32611 USA

[4] Univ Florida, Dept Soil & Water Sci, Gainesville, FL 32611 USA

来源：

JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY | 2016年 / 33卷

基金：

中国国家自然科学基金; 美国国家科学基金会;

关键词：

Sorption; Filtration; Engineered carbon; Heavy metals; Modified carbon; ACTIVATED CARBON; HEAVY-METALS; HYDROTHERMAL CARBONIZATION; CHEMICAL ACTIVATION; MAGNETIC BIOCHAR; METHYLENE-BLUE; FAST PYROLYSIS; LOW-COST; SORPTION; WATER;

D O I：

10.1016/j.jiec.2015.10.007

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Engineered biochar was obtained through slow pyrolysis of hickory wood and then further modified with NaOH. After modification, biochar's surface area, cation-exchange capacity, and thermal stability were significantly improved. The modified biochar exhibited much larger (2.6-5.8 times) metal adsorption capacities than the pristine biochar. Competitive batch adsorption of mixed metal ions (Pb2+, Cd2+, Cu2+, Zn2+, and Ni2+) showed preferential adsorption of Pb2+ and Cu2+ onto the modified biochar. The alkali-modified biochar in a fixed-bed column also showed strong ability to filter heavy metals from aqueous solutions. The alkali-modified biochar thus can serve as alternative absorbent for heavy metals. (C) 2015 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.

引用

页码：239 / 245

页数：7

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