Investigating the adsorption behavior and the relative distribution of Cd2+ sorption mechanisms on biochars by different feedstock

被引：307
作者：
Wang, Rong-Zhong [1 ,2 ]
Huang, Dan-Lian [1 ,2 ]
Liu, Yun-Guo [1 ,2 ]
Zhang, Chen [1 ,2 ]
Lai, Cui [1 ,2 ]
Zeng, Guang-Ming [1 ,2 ]
Cheng, Min [1 ,2 ]
Gong, Xiao-Min [1 ,2 ]
Wan, Jia [1 ,2 ]
Luo, Hao [1 ,2 ]
机构：
[1] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China
[2] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2018年 / 261卷
基金：
中国国家自然科学基金;
关键词：
Biochar; Cadmium; Adsorption mechanism; Feedstock; Heavy metal; IONIZABLE ANTIBIOTIC SULFAMETHAZINE; AQUEOUS-SOLUTION; MICROBIAL COMMUNITY; STRAW BIOCHAR; METAL-IONS; REMOVAL; LEAD; CADMIUM; PYROLYSIS; CD(II);
D O I：
10.1016/j.biortech.2018.04.032
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
The objective of this study was to investigate the adsorption behavior and the relative distribution of Cd2+ sorption mechanisms on biochars by different feedstock. Bamboo biochars (BBCs), corn straw biochars (CBCs) and pig manure biochars (PBCs) were prepared at 300-700 degrees C. Adsorption results showed PBCs have the best adsorption capacity for Cd2+, the extra adsorption capacity of PBCs mainly attributed to the precipitation or cation exchange, which played an important role in the removal of Cd2+ by PBCs. The contribution of involved Cd2+ removal mechanism varied with feedstock due to the different components and oxygen-containing functional groups. Cd2+-pi interaction was the predominant mechanism for Cd2+ removal on biochars and the contribution proportion significantly decreased from 82.17% to 61.83% as the ash content increased from 9.40% to 58.08%. Results from this study may suggest that the application of PBC is a feasible strategy for removing metal contaminants from aqueous solutions.
引用
收藏
页码：265 / 271
页数：7
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