Effects of zero-valent iron added in the flooding or drainage process on cadmium immobilization in an acid paddy soil
文献类型：期刊论文
| 作者 | Meng, Hanbing1,2,4; Hu, Shiwen4; Hong, Zebin4; Chi, Wenting4; Chen, Guojun4; Cheng, Kuan4; Wang, Qi4; Liu, Tongxu4; Li, Fangbai4; Liu, Kexue3 |
| 刊名 | JOURNAL OF ENVIRONMENTAL SCIENCES
 |
| 出版日期 | 2024-04-01 |
| 卷号 | 138页码:19-31 |
| 关键词 | Paddy soil Zero-valent iron Cadmium Flooding and drainage Remediation |
| ISSN号 | 1001-0742 |
| DOI | 10.1016/j.jes.2023.03.032 |
| 英文摘要 | Zero-valent iron (ZVI) is a promising material for the remediation of Cd-contaminated paddy soils. However, the effects of ZVI added during flooding or drainage processes on cadmium (Cd) retention remain unclear. Herein, Cd-contaminated paddy soil was incubated for 40 days of flooding and then for 15 days of drainage, and the underlying mechanisms of Cd immobilization coupled with Fe/S/N redox processes were investigated. The addition of ZVI to the flooding process was more conducive to Cd immobilization. Less potential available Cd was detected by adding ZVI before flooding, which may be due to the increase in paddy soil pH and newly formed secondary Fe minerals. Moreover, the reductive dissolution of Fe minerals promoted the release of soil colloids, thereby increasing significantly the surface sites and causing Cd immobilization. Additionally, the addition of ZVI before flooding played a vital role in Cd retention after soil drainage. In contrast, the addition of ZVI in the drainage phase was not conducive to Cd retention, which might be due to the rapid decrease in soil pH that inhibited Cd adsorption and further immobilization on soil surfaces. The findings of this study demonstrated that Cd availability in paddy soil was largely reduced by adding ZVI during the flooding period and provide a novel insight into the mechanisms of ZVI re mediation in Cd-contaminated paddy soils.(c) 2023 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V. |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001145961300001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/76134]  |
| 专题 | 中国科学院广州地球化学研究所 |
| 通讯作者 | Yang, Yang |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Guangzhou Xinhua Univ, Sch Resources & Planning, Guangzhou 510310, Peoples R China 4.Guangdong Acad Sci, Natl Reg Joint Engn Res Ctr Soil Pollut Control &, Inst Ecoenvironm & Soil Sci, Guangdong Key Lab Integrated Agroenvironm Pollut C, Guangzhou 510650, Peoples R China |
| 推荐引用方式 GB/T 7714 | Meng, Hanbing,Hu, Shiwen,Hong, Zebin,et al. Effects of zero-valent iron added in the flooding or drainage process on cadmium immobilization in an acid paddy soil[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2024,138:19-31. |
| APA | Meng, Hanbing.,Hu, Shiwen.,Hong, Zebin.,Chi, Wenting.,Chen, Guojun.,...&Yang, Yang.(2024).Effects of zero-valent iron added in the flooding or drainage process on cadmium immobilization in an acid paddy soil.JOURNAL OF ENVIRONMENTAL SCIENCES,138,19-31. |
| MLA | Meng, Hanbing,et al."Effects of zero-valent iron added in the flooding or drainage process on cadmium immobilization in an acid paddy soil".JOURNAL OF ENVIRONMENTAL SCIENCES 138(2024):19-31. |
入库方式： OAI收割
来源：广州地球化学研究所
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