| 碳基材料负载纳米零价铁去除六价铬的研究进展 |
| |
| 引用本文： | 刘美丽,牛其建,俞洋洋,成亮.碳基材料负载纳米零价铁去除六价铬的研究进展[J].环境科学研究,2022,35(3):768-779. |
| |
| 作者姓名： | 刘美丽 牛其建 俞洋洋 成亮 |
| |
| 作者单位： | 1.江苏大学环境与安全工程学院，江苏 镇江 212013 |
| |
| 基金项目： | 江苏省重点研发项目计划(No.BE2020676)；;中国博士后科学基金(No.2020M671359)~~； |
| |
| 摘 要： | 近年来，纳米零价铁(nZVI)因具有比表面积大、还原能力强、成本低的特点被用于去除环境中的六价铬〔Cr(Ⅵ)〕，然而由于高表面能、固有磁力等因素的影响，nZVI具有易团聚、易氧化和不稳定的缺点，限制了其广泛应用. 鉴于此，本文以碳材料作为支持材料改性nZVI，比较了制备碳基nZVI复合材料的方法，分析了不同碳基nZVI复合材料去除Cr(Ⅵ)的反应效能，阐述了影响复合材料去除Cr(Ⅵ)的因素. 结果表明:①湿化学法合成的复合材料有利于提高nZVI的分散性，减少团聚. 热转化法合成的复合材料有利于节约成本，提高碳材料和nZVI的结合性. ②不同碳材料负载nZVI能有效提高nZVI的分散性、稳定性和抗氧化性. ③碳基材料负载nZVI能有效降低环境因素对nZVI的负面影响. ④碳基nZVI复合材料能提高对Cr(Ⅵ)的去除能力，其对Cr(Ⅵ)的最大吸附容量比nZVI高1.2～20倍. 本文旨在深入了解碳基nZVI复合材料的合成方法，提高碳基nZVI复合材料的性能，以期为开发高效稳定的碳基nZVI复合材料修复环境中的Cr(Ⅵ)提供一些启示.
|
| 关 键 词： | 碳基材料 纳米零价铁 制备方法 反应效能 六价铬去除 |
| 收稿时间： | 2021-04-13 |
Progress in Removal of Hexavalent Chromium by Carbon-Based Materials Loaded with Nano Zero-Valent Iron |
| |
| LIU Meili,NIU Qijian,YU Yangyang,CHENG Liang.Progress in Removal of Hexavalent Chromium by Carbon-Based Materials Loaded with Nano Zero-Valent Iron[J].Research of Environmental Sciences,2022,35(3):768-779. |
| |
| Authors: | LIU Meili NIU Qijian YU Yangyang CHENG Liang |
| |
| Affiliation: | 1.School of Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China2.School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China |
| |
| Abstract: | In recent years, nano zero-valent iron (nZVI) has been used to remove Cr(Ⅵ) because of its large specific surface area, strong reducing power, and low cost. However, due to the high surface energy and inherent magnetic force, nZVI particles are prone to conglomerate, easily oxidize, and become unstable in air, limiting their applications. In view of this, this review paper focuses on modified nZVI with carbon materials as supporting platforms, comparison of carbon-based nZVI composite preparation methods, reaction efficiency analysis of different carbon-based nZVI composites for Cr(Ⅵ) removal, and the factors affecting Cr(Ⅵ) removal by the composite materials. The results show that: (1) The composite synthesized by wet chemistry method is beneficial for enhancing nZVI dispersion and reducing conglomeration. Also, the composite synthesized by the thermal conversion method helps save cost and improve the binding property of carbon materials and nZVI. (2) Generally, different carbon materials loaded with nZVI can effectively improve the dispersion, stability, and oxidation resistance of the nZVI. (3) Carbon-based materials embedded with nZVI can significantly reduce the adverse effects of environmental factors on nZVI. (4) Carbon-based nZVI composites can enhance the removal capacity of Cr(Ⅵ), and the maximum adsorption capacity of Cr(Ⅵ) is 1.2-20 times higher than that of nZVI. This review is intended to provide the synthesis methods of carbon-based nZVI composites. And it is to improve the properties of carbon-based nZVI composites. It is expected to provide some enlightenment for the development of efficient and stable carbon-based nZVI composites to repair Cr(Ⅵ) in the environment. |
| |
| Keywords: | |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《环境科学研究》浏览原始摘要信息 |
|
点击此处可从《环境科学研究》下载全文 |
|
