The effect of several activated biochars on Cd immobilization and microbial community composition during in-situ remediation of heavy metal contaminated sediment
The effect of several activated biochars on Cd immobilization and microbial community composition during in-situ remediation of heavy metal contaminated sediment
复制标题
几种活化生物炭对重金属污染沉积物原位修复过程中镉固定和微生物群落组成的影响
DOI：
10.1016/j.chemosphere.2018.06.023
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发表时间：
2018-10-01
期刊：
影响因子：
8.8
通讯作者：
Wen, Jun
中科院分区：
文献类型：
--
作者：
Liu, Si-jia;Liu, Yun-guo;Wen, Jun
采用化学活化和微波辅助活化两种方法对生物炭进行改性。采用SEM、BET、FTIR、XRD和XPS等手段对活性炭进行了表征。比较了生生物炭、活性生物炭和商品活性炭对含镉量为14.70 mg/kg的湘江底泥的修复效果。经活性生物炭处理后，上覆水和孔隙水中Cd浓度分别降低了71%和49%。重金属的威胁沿着降低，Cd的生物有效性也随之降低。此外，Cd在沉积物中的固定化与活性生物炭的BET比表面积和含氧官能团含量有关。此外，还进行了基于PCR-DGGE的微生物群落检测实验。活性炭处理后，原有的微生物群落受到影响，出现了新的微生物群落。活性生物炭可作为一种廉价、高效的沉积物原位修复材料。(C)2018爱思唯尔有限公司版权所有
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.