Chemical forms and risk assessment of heavy metals in sludge-biochar produced by microwave-induced low temperature pyrolysis
文献类型：期刊论文
| 作者 | Liu, Xingxin; Wang, Yawei; Gui, Chengmin; Li, Ping; Zhang, Junya ; Zhong, Hui; Wei, Yuansong
|
| 刊名 | RSC ADVANCES
 |
| 出版日期 | 2016 |
| 卷号 | 6期号:104页码:101960-101967 |
| 英文摘要 | Biochar, a stable, carbon-rich solid produced during biomass pyrolysis, has been widely used in soil conditioning. A promising option to alleviate the problem of sludge management. In this study, Cr, Ni, Zn, Cd, As, Pb and Cu were studied owing to their relatively high content in the sludge and their potential to cause environmental damage. Sludge-biochars were produced at different temperatures (300 degrees C, 350 degrees C, 400 degrees C and 450 degrees C) by microwave pyrolysis. BCR (European Community Bureau of Reference: a sequential extraction) analysis reveals that speciation distribution varied largely with the different heavy metals. Three risk analysis models were adopted to evaluate the risk of heavy metals: the risk assessment code (RAC), geo-accumulation index (I-geo) and potential ecological risk index (Er). The heavy metals risk in the biochar were lower compared with the sludge except for Pb (sludge: 4.3, biochar: 9.4-15.6) as assessed by RAC analysis. The Er result shows that risk from heavy metals decreased except for Cd (sludge: 63.53, biochar: 153.53-189.38). The I-geo model indicated that all seven heavy metals were present at higher levels in biochar than in the sludge. Although the total metal concentration in biochar increased after pyrolysis, this result indicates that heavy metal risk of microwave pyrolysis sludge-biochar should be considered alongside local soil backgrounds and speciation distributions. |
| 收录类别 | SCI |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/35737]  |
| 专题 | 生态环境研究中心_大气污染控制中心 |
| 推荐引用方式 GB/T 7714 | Liu, Xingxin,Wang, Yawei,Gui, Chengmin,et al. Chemical forms and risk assessment of heavy metals in sludge-biochar produced by microwave-induced low temperature pyrolysis[J]. RSC ADVANCES,2016,6(104):101960-101967. |
| APA | Liu, Xingxin.,Wang, Yawei.,Gui, Chengmin.,Li, Ping.,Zhang, Junya.,...&Wei, Yuansong.(2016).Chemical forms and risk assessment of heavy metals in sludge-biochar produced by microwave-induced low temperature pyrolysis.RSC ADVANCES,6(104),101960-101967. |
| MLA | Liu, Xingxin,et al."Chemical forms and risk assessment of heavy metals in sludge-biochar produced by microwave-induced low temperature pyrolysis".RSC ADVANCES 6.104(2016):101960-101967. |
入库方式： OAI收割
来源：生态环境研究中心
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