| A combination of bioleaching and bioprecipitation for deep removal of contaminating metals from dredged sediment | |
| Fang, Di1,2; Zhang, Ruichang1; Zhou, Lixiang3; Li, Jie1 | |
| 刊名 | JOURNAL OF HAZARDOUS MATERIALS
 |
| 2011-08-15 | |
| 卷号 | 192期号:1页码:226-233 |
| 关键词 | Sediment Metal contamination Bioremediation Acidithiobacillus thiooxidans Sulfate-reducing bacteria |
| ISSN号 | 0304-3894 |
| DOI | 10.1016/j.jhazmat.2011.05.008 |
| 通讯作者 | Fang, Di(dfang@ouc.edu.cn) |
| 英文摘要 | A linked microbial process comprising bioleaching with sulfate-oxidizing bacteria and bioprecipitation with sulfate-reducing bacteria operating sequentially was investigated to deeply remove contaminating metals from dredged sediment. The results showed that sediment bioleaching resulted in a sharp decrease in sediment pH from an initial pH similar to 7.6 to pH similar to 2.5 within 10-20 days, approximately 65% of the main heavy metals present (Zn + Cu + Cr) were solubilized, and most of the unsolubilized metals existed in residual form of sediment. The acidic leachate that resulted from sediment bioleaching was efficiently stripped of metal sulfates using a bioprecipitation reactor when challenged with influent as low as pH similar to 3.7. More than 99% of Zn(2+), 99% of Cu(2+) and 90% of Cr(3+) were removed from the leachate, respectively, due to the formation of ZnS, Cu(2)S and CrOOH precipitates, as confirmed by SEM-EDS and XRD detection. It was also found that alkalization of bioleached sediment using Ca(OH)(2) excluded the risk of sediment re-acidification. The ability of the combined process developed in this study to deeply remove heavy metals in insoluble sulfides or hydroxides forms makes it particularly attractive for the treatment of different types of metal contaminants. (C) 2011 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | FLUIDIZED-BED TREATMENT ; ACID-MINE DRAINAGE ; HEAVY-METALS ; SULFATE-REDUCTION ; SEWAGE-SLUDGE ; TOXIC METALS ; WASTE-WATER ; SULFUR ; SOIL ; BIOREMEDIATION |
| WOS研究方向 | Engineering ; Environmental Sciences & Ecology |
| WOS类目 | Engineering, Environmental ; Engineering, Civil ; Environmental Sciences |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE BV |
| WOS记录号 | WOS:000293483100028 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2559077 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Fang, Di |
| 作者单位 | 1.Ocean Univ China, Dept Environm Engn, Qingdao 266100, Peoples R China 2.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China 3.Nanjing Agr Univ, Dept Environm Engn, Nanjing 210095, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fang, Di,Zhang, Ruichang,Zhou, Lixiang,et al. A combination of bioleaching and bioprecipitation for deep removal of contaminating metals from dredged sediment[J]. JOURNAL OF HAZARDOUS MATERIALS,2011,192(1):226-233. |
| APA | Fang, Di,Zhang, Ruichang,Zhou, Lixiang,&Li, Jie.(2011).A combination of bioleaching and bioprecipitation for deep removal of contaminating metals from dredged sediment.JOURNAL OF HAZARDOUS MATERIALS,192(1),226-233. |
| MLA | Fang, Di,et al."A combination of bioleaching and bioprecipitation for deep removal of contaminating metals from dredged sediment".JOURNAL OF HAZARDOUS MATERIALS 192.1(2011):226-233. |
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