Evaluation of arsenic immobilization in red mud by CO2 or waste acid acidification combined ferrous (Fe2+) treatment
文献类型：期刊论文
| 作者 | Li, Yiran ; Wang, Jun ; Peng, Xianjia ; Ni, Fan ; Luan, Zhaokun |
| 刊名 | Engineering; Environmental Sciences & Ecology
 |
| 出版日期 | 2012 |
| 卷号 | 199期号:1页码:43-50 |
| 关键词 | Arsenic immobilization Acidification Ferrous Red mud |
| ISSN号 | 0304-3894 |
| 中文摘要 | Arsenic was detected in a red mud (RM) produced during alumina production from bauxite known as the Bayer process. The transporting RM was a mixture of RM solid phase (RMsf) and RM liquid phase (RMlf). The mass content of RMsf in RM is about 30-40%. The alkalinities concentrations in the RMlf were in a range of 37.2 x 10(3) mg/l to 51.5 x 10(3) mg/l. Acidification by CO2 or waste acid (WA) combined with ferrous (Fe2+) treatment was evaluated for arsenic immobilization in the RM. The aqueous arsenic concentration in the RMlf decreased from 6.1 mg/l to 0.5 mg/l and 0.06 mg/l with the addition of CO2 and WA, respectively. Ferrous was then added to decrease the aqueous arsenic concentration to be lower than 0.05 mg/l. The cost-effective dosages of CO2 or WA were 80.1 g/l or 26.7 g/l, and the corresponding dosages of ferrous were both 6g/l. A 2(3) full factorial design was employed to evaluate the importance of chemical components of the RM in the cost of arsenic immobilization. High concentrations of arsenic and alkalinities in the RM will increase the cost while the effects of alumina contents varied during the different acidifications. Dissolvable arsenic in the RMsf was 8.2% and 9.5% after the CO2 and WA combined ferrous treatments, respectively. (C) 2011 Published by Elsevier B.V. |
| WOS记录号 | WOS:000299977000006 |
| 公开日期 | 2014-11-28 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/8136]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Li, Yiran,Wang, Jun,Peng, Xianjia,et al. Evaluation of arsenic immobilization in red mud by CO2 or waste acid acidification combined ferrous (Fe2+) treatment[J]. Engineering; Environmental Sciences & Ecology,2012,199(1):43-50. |
| APA | Li, Yiran,Wang, Jun,Peng, Xianjia,Ni, Fan,&Luan, Zhaokun.(2012).Evaluation of arsenic immobilization in red mud by CO2 or waste acid acidification combined ferrous (Fe2+) treatment.Engineering; Environmental Sciences & Ecology,199(1),43-50. |
| MLA | Li, Yiran,et al."Evaluation of arsenic immobilization in red mud by CO2 or waste acid acidification combined ferrous (Fe2+) treatment".Engineering; Environmental Sciences & Ecology 199.1(2012):43-50. |
入库方式： OAI收割
来源：生态环境研究中心
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