Rational construction of micron-sized zero-valent iron/graphene composite for enhanced Cr(VI) removal from aqueous solution
文献类型：期刊论文
| 作者 | Wang, Haitao6; Wang, Yue6; Liu, Zhenglong6; Luo, Shuangjiang5; Romanovski, Valentin3,4; Huang, Xianqiang1; Czech, Bozena2; Sun, Hongwen6; Li, Tielong6 |
| 刊名 | Journal of Environmental Chemical Engineering
 |
| 出版日期 | 2022-12-01 |
| 卷号 | 10期号:6 |
| 关键词 | Activated carbon treatment - Chemicals removal (water treatment) - Chromium compounds - Electrodes - Hydrogen - Iron compounds - Nanosheets - Passivation - Reaction intermediates - Wastewater treatment |
| DOI | 10.1016/j.jece.2022.109004 |
| 英文摘要 | Micron-sized zero-valent iron (mZVI) has been widely used in wastewater treatment. However, the readily formation of FeCr hydroxide passivation layer limited its application in Cr(VI)-containing wastewater treatment. This study reports the rational construction of mZVI/graphene composite (mZVI/G) through a simple and environmental-friendly mechanochemical method. Owing to the extraordinary mechanical strength, graphene nanosheets intertwine with the mZVI particles to form a strong coupled system, leading to the decoupling of water corrosion of Fe0 to two half reactions:1) Fe0 as anode lose electron to produce Fe(II); 2) Graphene nanosheets serve as cathode for hydrogen gas formation involving atomic hydrogen (H鈭? as intermediate. Compared to carbon nanotubes and activated carbon, graphene nanosheets could stabilize H鈭?due to the electron sponge effect related to large 蟺conjugation system. When mZVI/G was used for Cr(VI) removal, the Cr(VI) species were preferentially adsorbed onto the graphene nanosheets, on which to be reduced to Cr(III) by Fe(II) as well as H鈭? The mZVI/G achieved a stable Cr(VI) removal capacity for eight consecutive cycles, reaching 102.35 mg路g-1 with the optimal composition, which was 11, 3.12 and 2.17 times higher than that of physical mixed mZVI and GO, mZVI/AC and mZVI/CNT, respectively. Moreover, mZVI/G can achieve efficient removal of Cr(VI) over a wide pH range (3.0 - 9.0). Given the low cost and green chemistry nature, the mechanochemical synthesized mZVI/G was considered to be a promising material for the treatment of Cr(VI) contaminated water. 漏 2022 Elsevier Ltd. |
| 学科主题 | Activated Carbon |
| 项目编号 | The authors acknowledge the financial support by the National Natural Science Foundation of China ( 42277056 ), the National Key Research and Development Program of China ( 2018YFC1802001 ), National Natural Science Foundation of China (Key Program 22036004), NCC fund (No. NCC2020PY16), the Fundamental Research Funds for the Central Universities Nankai University (No. 63191408), |
| 出版者 | Elsevier Ltd |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/61316]  |
| 作者单位 | 1.Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng; 252059, China 2.Department of Radiochemistry and Environmental Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University in Lublin, Pl. M. Curie-Sklodowskiej 3, Lublin; 20-031, Poland 3.Department of Materials Science and Engineering, University of Virginia, Charlottesville; VA; 22904, United States 4.Center of Functional Nano-Ceramics, National University of Science and Technology 'misis', Moscow; 119049, Russia 5.Institute of Process Engineering, Chinese Academy of Sciences, Beijing; 100190, China 6.Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution, Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), College of Environmental Science and Engineering, Nankai University, Tianjin; 300350, China |
| 推荐引用方式 GB/T 7714 | Wang, Haitao,Wang, Yue,Liu, Zhenglong,et al. Rational construction of micron-sized zero-valent iron/graphene composite for enhanced Cr(VI) removal from aqueous solution[J]. Journal of Environmental Chemical Engineering,2022,10(6). |
| APA | Wang, Haitao.,Wang, Yue.,Liu, Zhenglong.,Luo, Shuangjiang.,Romanovski, Valentin.,...&Li, Tielong.(2022).Rational construction of micron-sized zero-valent iron/graphene composite for enhanced Cr(VI) removal from aqueous solution.Journal of Environmental Chemical Engineering,10(6). |
| MLA | Wang, Haitao,et al."Rational construction of micron-sized zero-valent iron/graphene composite for enhanced Cr(VI) removal from aqueous solution".Journal of Environmental Chemical Engineering 10.6(2022). |
入库方式： OAI收割
来源：过程工程研究所
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