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
收藏
页码：239 / 245
页数：7
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