Adsorption of Cadmium and Arsenic by Corn Stalk Biochar Solidified Microorganism

被引：4
|
作者：
Liu Y.-L. [1 ,2 ,3 ]
Zhu H.-C. [1 ]
Peng O. [1 ,2 ,3 ]
Li D.-Y. [1 ,2 ,3 ]
Yang R.-J. [1 ,2 ,3 ]
Peng J. [1 ,2 ,3 ]
Tie B.-Q. [1 ,2 ,3 ]
机构：
[1] College of Resources and Environment, Hunan Agricultural University, Changsha
[2] Engineering Research Center for Water Pollution Purification of Irrigation Source in Hunan Province, Changsha
[3] Hunan Engineering Research Center for Safe and High-Efficient Utilization of Heavy Metal Pollution Farmland, Changsha
来源：
Huanjing Kexue/Environmental Science | 2020年 / 41卷 / 09期
关键词：
Adsorption; Arsenic; Cadmium; Corn stalks biochar; Microorganism; Solidified;
D O I：
10.13227/j.hjkx.201912036
中图分类号：
学科分类号：
摘要：
Immobilization of bacteria on biochar can improve the performance of the soil complex polluted with cadmium (Cd) and arsenic (As). In this study, bacteria (Delftia sp. B9, B9), biochar (corn stalks biochar, CSB), and biochar-bacteria complexes (B-CSB) were used as adsorption materials to explore the adsorption characteristics of Cd and As. The effects of pH on the adsorption performance of Cd and As and the ion removal from the aqueous solution were investigated, and the adsorption behaviors were simulated using an isothermal adsorption model. The changes in Cd and As speciation with the addition of B9, CSB, and B-CSB to As and Cd-contaminated soil were explored. The results showed that the Cd-saturated adsorption capacities of B9, CSB, and B-CSB were 49.43, 82.68, and 75.38 mg•g-1, respectively; the As-saturated adsorption capacities were 24.67, 42.92, and 34.03 mg•g-1, respectively. The concentration of available Cd and As significantly decreased, whereas the residual fraction increased after the addition of B-CSB. B-CSB was shown to be an effective material for the remediation of soil complexes polluted with Cd and As. © 2020, Science Press. All right reserved.
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页码：4322 / 4332
页数：10
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