Humic acid promotes arsenopyrite bio-oxidation and arsenic immobilization
文献类型：期刊论文
| 作者 | Zhang, DR; Chen, HR; Xia, JL; Nie, ZY; Fan, XL; Liu, HC; Zheng, L; Zhang, LJ; Yang, HY |
| 刊名 | JOURNAL OF HAZARDOUS MATERIALS
 |
| 出版日期 | 2020 |
| 卷号 | 384页码:- |
| 关键词 | NATURAL ORGANIC-MATTER ACIDITHIOBACILLUS-FERROOXIDANS OXIDATIVE DISSOLUTION SURFACE ADSORPTION FEASS IRON COMPLEXATION FUNDAMENTALS MECHANISMS |
| ISSN号 | 0304-3894 |
| DOI | 10.1016/j.jhazmat.2019.121359 |
| 文献子类 | 期刊论文 |
| 英文摘要 | The bio-oxidative dissolution of arsenopyrite, the most severe arsenic contamination source, can be mediated by organic substances, but pertinent studies on this subject are scarce. In this study, the bio-oxidative dissolution of arsenopyrite by Sulfobacillus thermosulfidooxidans and arsenic immobilization were evaluated in the presence of humic acid (HA). The mineral dissolution was monitored through analyses of the parameters in solution, phase and element speciation transformations on the mineral surface, and arsenic immobilization on the surfaces of cells and jarosites-HA. The results show that the presence of HA enhances the dissolution of arsenopyrite, e.g., 7.1% of arsenopyrite was in the residue after 12 d of bio-oxidation compared to 19.3% in the absence of HA. Meanwhile, the presence of HA led to changes of the fates of As and Fe and no accumulation of elemental sulfur (S-0) or ferric arsenate on the mineral surface. Moreover, a flocculent porous structure was formed on the surfaces of both microbial cells and jarosites, on which a large amount of arsenic was adsorbed. These results clearly indicate that HA can simultaneously promote the dissolution of arsenopyrite and arsenic immobilization, which may be significant for bioleaching of arsenopyrite-bearing contaminated sites. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/32914]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Northeastern Univ, Sch Met, Shenyang 110819, Peoples R China 2.Cent S Univ, Sch Minerals Proc & Bioengn, Key Lab Biomet, Minist Educ China, Changsha 410083, Peoples R China 3.Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, DR,Chen, HR,Xia, JL,et al. Humic acid promotes arsenopyrite bio-oxidation and arsenic immobilization[J]. JOURNAL OF HAZARDOUS MATERIALS,2020,384:-. |
| APA | Zhang, DR.,Chen, HR.,Xia, JL.,Nie, ZY.,Fan, XL.,...&Yang, HY.(2020).Humic acid promotes arsenopyrite bio-oxidation and arsenic immobilization.JOURNAL OF HAZARDOUS MATERIALS,384,-. |
| MLA | Zhang, DR,et al."Humic acid promotes arsenopyrite bio-oxidation and arsenic immobilization".JOURNAL OF HAZARDOUS MATERIALS 384(2020):-. |
入库方式： OAI收割
来源：上海应用物理研究所
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