Journal
CHEMOSPHERE
Volume 208, Issue -, Pages 655-664Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2018.06.023
Keywords
Sediment; In-situ remediation; Activated biochar; Cadmium; Microbial community composition
Categories
Funding
- National Natural Science Foundation of China [51609268, 51521006]
- Key Project of Technological Innovation in the Field of Social Development of Hunan Province, China [2016SK2010, 2016SK2001]
- Fundamental Research Funds for the Central Universities
- Natural Science Foundation of Hunan Province, China [2018JJ3040, 2018JJ3096]
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Chemical activation and microwave assisted activation were adopted to modify biochar. Activated biochars were characterized by SEM, BET, FTIR, XRD and XPS. Raw biochar, activated biochars and commercial activated carbon were compared as remediation strategies for sediment from the Xiangjiang River containing 14.70 mg/kg Cd. After the treatment by activated biochar, the overlying water and pore water concentration of Cd decreased by 71% and 49%, respectively. And the threat of heavy metal along with bioavailability of Cd was depressed. Moreover, the immobilsation of Cd in sediment was related to BET surface area and the content of oxygen containing functional groups of activated biochars. Furthermore, a PCR-DGGE-based experiment was performed for the detection of microbial community. The indigenous microbial community was affected and new microbial community appeared after treat by activated biochar. Activated biochar can be used as an inexpensive and efficient in situ remediation material of sediment containing metal. (C) 2018 Elsevier Ltd. All rights reserved.
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