College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China.
College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China.
Chemosphere. 2018 Oct;208:655-664. doi: 10.1016/j.chemosphere.2018.06.023. Epub 2018 Jun 4.
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.
采用化学活化和微波辅助活化对生物炭进行改性。采用 SEM、BET、FTIR、XRD 和 XPS 对活化生物炭进行了表征。将原生物炭、活化生物炭和商业活性炭作为湘江含 14.70mg/kgCd 底泥的修复策略进行了比较。用活化生物炭处理后，上覆水和孔隙水中 Cd 的浓度分别降低了 71%和 49%，重金属的威胁和 Cd 的生物有效性都得到了抑制。此外，Cd 在沉积物中的固定化与活化生物炭的 BET 表面积和含氧官能团含量有关。进一步通过 PCR-DGGE 实验检测微生物群落。用活化生物炭处理后，土著微生物群落受到影响，出现了新的微生物群落。活化生物炭可用作含有金属的底泥的一种廉价、高效的原位修复材料。
