Immobilization of arsenic in soils by stabilized nanoscale zero-valent iron, iron sulfide (FeS), and magnetite (Fe3O4) particles
文献类型：期刊论文
| 作者 | Zhang MeiYi; Wang Yu; Zhao DongYe; Pan Gang |
| 刊名 | CHINESE SCIENCE BULLETIN
 |
| 出版日期 | 2010-02 |
| 卷号 | 55期号:3页码:365-372 |
| 关键词 | arsenic immobilization iron nanoparticle soil pollution soil remediation |
| 中文摘要 | Arsenic is a widespread contaminant in soils and groundwater. While various iron-based materials have been studied for immobilizing arsenic in contaminated soils, the feasibility of stabilized iron-based nanoparticles has not been reported. This study investigates the effectiveness of using three types of starch-stabilized iron-based nanoparticles, including zero-valent iron (ZVI), iron sulfide (FeS), and magnetite (Fe3O4), for immobilization of arsenic in two representative As-contaminated soils (an orchard soil and a fire range soil). To test the effect of the nanoparticles on the arsenic leachability, As-contaminated soils were amended with the nanoparticles at various Fe/As molar ratios (5:1-100:1) and contact time (3 and 7 d). After three days' treatments of a field-contaminated sandy soil, the PBET-based bioaccessibility of As decreased from an initial (71.3 +/- 3.1)% (mean +/- SD) to (30.9 +/- 3.2)% with ZVI, (37.6 +/- 1.2)% with FeS, and (29.8 +/- 3.1)% with Fe3O4 at an Fe/As molar ratio of 100:1. The TCLP-based leachability of arsenic in a spiked fire range soil decreased from an initial (0.51 +/- 0.11)% to (0.24 +/- 0.03)%, (0.27 +/- 0.04)% and (0.17 +/- 0.04)% by ZVI, FeS, and Fe3O4 nanoparticles, respectively. The Fe3O4 nanoparticles appeared to be more effective (5% or more) than other nanoparticles for immobilizing arsenic. When the two soils were compared, the treatment is more effective on the orchard soil that has a lower iron content and higher initial leachability than on the range soil that already has a high iron content. These results suggest that these innocuous iron-based nanoparticles may serve as effective media for immobilization of As in iron-deficient soils, sediments or solid wastes. |
| WOS记录号 | WOS:000274843600006 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/21185]  |
| 专题 | 生态环境研究中心_环境纳米材料实验室 |
| 推荐引用方式 GB/T 7714 | Zhang MeiYi,Wang Yu,Zhao DongYe,et al. Immobilization of arsenic in soils by stabilized nanoscale zero-valent iron, iron sulfide (FeS), and magnetite (Fe3O4) particles[J]. CHINESE SCIENCE BULLETIN,2010,55(3):365-372. |
| APA | Zhang MeiYi,Wang Yu,Zhao DongYe,&Pan Gang.(2010).Immobilization of arsenic in soils by stabilized nanoscale zero-valent iron, iron sulfide (FeS), and magnetite (Fe3O4) particles.CHINESE SCIENCE BULLETIN,55(3),365-372. |
| MLA | Zhang MeiYi,et al."Immobilization of arsenic in soils by stabilized nanoscale zero-valent iron, iron sulfide (FeS), and magnetite (Fe3O4) particles".CHINESE SCIENCE BULLETIN 55.3(2010):365-372. |
入库方式： OAI收割
来源：生态环境研究中心
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