标题：Comparative study on the mobility and speciation of heavy metals in ashes from co-combustion of sewage sludge/dredged sludge and rice husk作者：Wang, Teng; Xue, Yongjie; Zhou, Min; Yuan, Yunjuan; Zhao, Suyun; Tan,Gang; Zhou, Xian; Geng, Junjun; Wu, Shaopeng; Hou, Haobo

来源出版物：CHEMOSPHERE 卷：169 页码：162-170 DOI：10.1016/j.chemosphere.2016.11.070 出版年：FEB 2017

摘要：The co-combustion of sludge (sewage and dredged sludge) with rice husk is expected to become a trend because of its economic and environmental benefits. However, the massive residues from the co combustion process and the mobility of heavy metals (HMs) warrant special attention. The basic performance and environmental properties of the trace elements (Cr, Cu, Fe, Mn, Ba and Zn) from the co-combustion ashes were studied to promote the further utilization of these materials. These ashes have a shell particle shape, high specific area, high amorphous content and low crystalline phase content. The investigation mainly focused on the environmental properties of these ashes to evaluate the risk of these by-products to the environment. Results show Cu, Mn, and Zn have cumulative leaching concentrations of 1.033, 23.32, and 3.363 mg/L for W, by contrast, Cr, Cu, Fe, Mn, Ba, and Zn have cumulative leaching concentrations of 0A88, 0.296, 8.069, 10.44, 2.568, and 2.691 mg/L for H, which are much greater than the Chinese ground water standard (GB/T14848-93). Meanwhile Mn, Zn, Ba, Cr, and Fe all pose a very high risk for H, while Cu only poses a medium risk, and all HMs in W exhibit much lower contamination levels than those in H by the method of risk assessment code (RAC). It indicates that these ashes have undesirably high levels of HMs that demonstrate high mobility and pose environmental risks according to their leachability and chemical speciation. And the HMs in W show lower mobility and environmental hazards than those in H.

入藏号：WOS:000393003300020

文献类型：Article

语种：English

作者关键词：Sludge, Rice husk, Co-combustion, Heavy metals, Mobility, Chemical speciation

扩展关键词：ENVIRONMENTAL RISK-ASSESSMENT; SURFACE SEDIMENTS; FLY-ASH; BIO-OIL; PART II; BIOMASS; COAL; EXTRACTION; WOOD; CONTAMINATION

通讯作者地址：Hou, HB (reprint author), Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

电子邮件地址：houhb@whu.edu.cn

地址：

[Wang, Teng; Zhou, Min; Yuan, Yunjuan; Zhao, Suyun; Zhou, Xian; Geng, Junjun; Hou, Haobo] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

[Xue, Yongjie; Tan, Gang; Wu, Shaopeng] Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430072, Peoples R China.

研究方向：Environmental Sciences & Ecology

ISSN：0045-6535

eISSN: 1879-1298

影响因子：3.698