Institutional Repository of Key Laboratory of Coastal Zone Environmental Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences (KLCEP)
| Diphenylarsinic acid contaminated soil remediation by titanium dioxide (P25) photocatalysis: Degradation pathway, optimization of operating parameters and effects of soil properties | |
Wang, AN; Teng, Y; Hu, XF ; Wu, LH; Huang, YJ; Luo, YM; Christie, P; Luo, YM (reprint author), 17 Chunhui Rd, Laishan Dist, Yantai, Peoples R China. ymluo@yic.ac.cn
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| 发表期刊 | SCIENCE OF THE TOTAL ENVIRONMENT
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| ISSN | 0048-9697 |
| 2016-01-15 | |
| 卷号 | 541页码:348-355 |
| 关键词 | Diphenylarsinic Acid Tio2(P25) Photocatalysis Electron Spin Resonance |
| DOI | 10.1016/j.scitotenv.2015.09.023 |
| 产权排序 | [Wang, A-nan; Teng, Ying; Wu, Long-hua; Huang, Yu-juan; Luo, Yong-ming; Christie, Peter] Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Jiangsu, Peoples R China; [Hu, Xue-feng; Luo, Yong-ming] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China; [Wang, A-nan] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| 作者部门 | 中科院海岸带环境过程与生态修复重点实验室 |
| 英文摘要 | Diphenylarsinic acid (DPAA) is formed during the leakage of arsenic chemical weapons in sites and poses a high risk to biota. However, remediation methods for DPAA contaminated soils are rare. Here, the photocatalytic oxidation (PCO) process by nano-sized titanium dioxide (TiO2) was applied to degrade DPAA in soil. The degradation pathway was firstly studied, and arsenate was identified as the final product. Then, an orthogonal array experimental design of L-9(3)(4), only 9 experiments were needed, instead of 81 experiments in a conventional one-factor-at-a-time, was used to optimize the operational parameters soil: water ratio, TiO2 dosage, irradiation time and light intensity to increase DPAA removal efficiency. Soil: water ratio was found to have a more significant effect on DPAA removal efficiency than other properties. The optimum conditions to treat 4 g soil with a DPAA concentration of 20 mg kg(-1) were found to be a 1:10 soil: water ratio, 40 mW cm(-2) light intensity, 5% TiO2 in soil, and a 3-hour irradiation time, with a removal efficiency of up to 82.7%. Furthermore, this method (except for a change in irradiation time from 3 to 1.5 h) was validated in nine different soils and the removal efficiencies ranged from 57.0 to 78.6%. Removal efficiencies were found to be negatively correlated with soil electrical conductivity, organic matter content, pH and total phosphorus content. Finally, coupled with electron spin resonance (ESR) measurement, these soil properties affected the generation of OH center dot by TiO2 in soil slurry. This study suggests that TiO2 photocatalytic oxidation is a promising treatment for removing DPAA from soil. (C) 2015 Elsevier B.V. All rights reserved. |
| 文章类型 | Article |
| 资助机构 | National Natural Science Foundation of China(41230858 ; 41171248) |
| 收录类别 | SCI |
| 语种 | 英语 |
| 关键词[WOS] | CHEMICAL WARFARE AGENTS ; PHENYLARSONIC ACID ; TIO2 SUSPENSIONS ; AQUEOUS-SOLUTION ; WATER-TREATMENT ; ADSORPTION ; TRANSFORMATION ; NANOPARTICLES ; PRODUCTS ; KINETICS |
| 研究领域[WOS] | Environmental Sciences & Ecology |
| WOS记录号 | WOS:000365289300038 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.yic.ac.cn/handle/133337/9418 |
| 专题 | 中国科学院海岸带环境过程与生态修复重点实验室 |
| 通讯作者 | Luo, YM (reprint author), 17 Chunhui Rd, Laishan Dist, Yantai, Peoples R China. ymluo@yic.ac.cn |
| 作者单位 | 1.Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat 2.Chinese Acad Sci, Yantai Inst Coastal Zone Res 3.Chinese Acad Sci, Grad Sch |
| 推荐引用方式 GB/T 7714 | Wang, AN,Teng, Y,Hu, XF,et al. Diphenylarsinic acid contaminated soil remediation by titanium dioxide (P25) photocatalysis: Degradation pathway, optimization of operating parameters and effects of soil properties[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2016,541:348-355. |
| APA | Wang, AN.,Teng, Y.,Hu, XF.,Wu, LH.,Huang, YJ.,...&Luo, YM .(2016).Diphenylarsinic acid contaminated soil remediation by titanium dioxide (P25) photocatalysis: Degradation pathway, optimization of operating parameters and effects of soil properties.SCIENCE OF THE TOTAL ENVIRONMENT,541,348-355. |
| MLA | Wang, AN,et al."Diphenylarsinic acid contaminated soil remediation by titanium dioxide (P25) photocatalysis: Degradation pathway, optimization of operating parameters and effects of soil properties".SCIENCE OF THE TOTAL ENVIRONMENT 541(2016):348-355. |
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