Oxalate modification enabled advanced phosphate removal of nZVI: In Situ formed surface ternary complex and altered multi-stage adsorption process
文献类型：期刊论文
| 作者 | Cao, Shiyu1,3; Li, Jiangshan3; Shi, Yanbiao1,2; Guo, Furong1; Gao, Tingjuan1; Zhang, Lizhi1,2 |
| 刊名 | JOURNAL OF ENVIRONMENTAL SCIENCES
 |
| 出版日期 | 2025-03-01 |
| 卷号 | 149页码:79-87 |
| 关键词 | Oxalate modification Advanced phosphate removal Surface ternary complex Multi -stage adsorption Nano zero-valent iron (nZVI) |
| ISSN号 | 1001-0742 |
| DOI | 10.1016/j.jes.2024.02.013 |
| 英文摘要 | Nano zero-valent iron (nZVI) is a promising phosphate adsorbent for advanced phosphate removal. However, the rapid passivation of nZVI and the low activity of adsorption sites seriously limit its phosphate removal performance, accounting for its inapplicability to meet the emission criteria of 0.1 mg P/L phosphate. In this study, we report that the oxalate modification can inhibit the passivation of nZVI and alter the multi -stage phosphate adsorption mechanism by changing the adsorption sites. As expected, the stronger antipassivation ability of oxalate modified nZVI (OX-nZVI) strongly favored its phosphate adsorption. Interestingly, the oxalate modification endowed the surface Fe(III) sites with the lowest chemisorption energy and the fastest phosphate adsorption ability than the other adsorption sites, by in situ forming a Fe(III)-phosphate-oxalate ternary complex, therefore enabling an advanced phosphate removal process. At an initial phosphate concentration of 1.00 mg P/L, pH of 6.0 and a dosage of 0.3 g/L of adsorbents, OX-nZVI exhibited faster phosphate removal rate (0.11 g/mg/min) and lower residual phosphate level (0.02 mg P/L) than nZVI (0.055 g/mg/min and 0.19 mg P/L). This study sheds light on the importance of site manipulation in the development of high-performance adsorbents, and offers a facile surface modification strategy to prepare superior iron -based materials for advanced phosphate removal. (c) 2024 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V. |
| 资助项目 | National Key Research and Development Program of China[2022YFA1205602] ; National Key Research and Development Program of China[2023YFC3707801] ; National Natural Science Foundation of China[U22A20402] ; National Natural Science Foundation of China[22376073] ; National Natural Science Foundation of China[21936003] ; National Natural Science Foundation of China[22306119] ; China Postdoctoral Science Foundation[2023T160419] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001208155800001 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/41173]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Gao, Tingjuan; Zhang, Lizhi |
| 作者单位 | 1.Cent China Normal Univ, Inst Environm & Appl Chem, Coll Chem, Key Lab Pesticide & Chem Biol,Minist Educ, Wuhan 430079, Peoples R China 2.Shanghai Jiao Tong Univ, Sch Environm Sci & Engn, Shanghai 200240, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cao, Shiyu,Li, Jiangshan,Shi, Yanbiao,et al. Oxalate modification enabled advanced phosphate removal of nZVI: In Situ formed surface ternary complex and altered multi-stage adsorption process[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2025,149:79-87. |
| APA | Cao, Shiyu,Li, Jiangshan,Shi, Yanbiao,Guo, Furong,Gao, Tingjuan,&Zhang, Lizhi.(2025).Oxalate modification enabled advanced phosphate removal of nZVI: In Situ formed surface ternary complex and altered multi-stage adsorption process.JOURNAL OF ENVIRONMENTAL SCIENCES,149,79-87. |
| MLA | Cao, Shiyu,et al."Oxalate modification enabled advanced phosphate removal of nZVI: In Situ formed surface ternary complex and altered multi-stage adsorption process".JOURNAL OF ENVIRONMENTAL SCIENCES 149(2025):79-87. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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