Fate and risk assessment of heavy metals in residue from co-liquefaction of Camellia oleifera cake and sewage sludge in supercritical ethanol

被引：38
作者：
Chen, Hongmei
Zhai, Yunbo [1 ]
Xu, Bibo
Xiang, Bobin
Zhu, Lu
Qiu, Lei
Liu, Xiaoting
Li, Caiting
Zeng, Guangming
机构：
[1] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2014年 / 167卷
关键词：
Camellia oleifera cake; Sewage sludge; Supercritical ethanol; Risk assessment; Heavy metals; QUANTITATIVE-EVALUATION; SEDIMENTS; IMMOBILIZATION; FRACTIONATION; INDIA;
D O I：
10.1016/j.biortech.2014.06.048
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
The fate and risk assessment of heavy metals (HMs) in solid residue from co-liquefaction of sewage sludge (SS) and Camellia oleifera cake (COC) in supercritical ethanol (SCE) were investigated. SCE effectively stabilized HMs in solid residues and a better stabilization was presented on Zn than Cd. Moreover, SCE significantly transformed Cd, Cu and Zn into F4, which reduced the risk to the environment. Furthermore, risk assessments of I-geo, E-r(i), RI and RAC demonstrated that the addition of COC was beneficial to the contamination decrement of HMs since pollution levels of HMs all decreased after treatment, and the lowest pollution level was obtained with SC-350. Therefore, SS treated by SCE with the addition of COC could be a promising technology for disposal of SS, especially considering the safety of COC as regards HMs problem. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：578 / 581
页数：4
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