在原位反应区使用 MoS2 纳米片高效修复受汞污染的地下水

IF 3.5 3区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES
Mengxia Wang , Qi Han , Meng Zhang , Xun Liu , Bei Liu , Zhongying Wang
{"title":"在原位反应区使用 MoS2 纳米片高效修复受汞污染的地下水","authors":"Mengxia Wang ,&nbsp;Qi Han ,&nbsp;Meng Zhang ,&nbsp;Xun Liu ,&nbsp;Bei Liu ,&nbsp;Zhongying Wang","doi":"10.1016/j.jconhyd.2024.104347","DOIUrl":null,"url":null,"abstract":"<div><p>Mercury contamination in groundwater is a serious global environmental issue that poses threats to human and environmental health. While MoS<sub>2</sub> nanosheets have been proven promising in removing Hg from groundwater, an effective tool for <em>in situ</em> groundwater remediation is still needed. In this study, we investigated the transport and retention behavior of MoS<sub>2</sub> nanosheets in sand column, and employed the formed MoS<sub>2</sub> <em>in situ</em> reactive zone (<em>IRZ</em>) for the remediation of Hg-contaminated groundwater. Breakthrough test revealed that high flow velocity and MoS<sub>2</sub> initial concentration promoted the transport of MoS<sub>2</sub> in sand column, while the addition of Ca ions increased the retention of MoS<sub>2</sub>. In Hg removal experiments, the groundwater flow velocity did not influence the Hg removal capacity due to the fast reaction rate between MoS<sub>2</sub> and Hg. With an optimized MoS<sub>2</sub> loading, MoS<sub>2</sub> <em>IRZ</em> effectively reduced the Hg effluent concentration down to &lt;1 μg/L without apparent Hg remobilization. Additionally, flake-like MoS<sub>2</sub> employed in this study showed much better Hg removal performance than flower-like and bulk MoS<sub>2</sub>, as well as other reported materials, with the Hg removal capacity a few to tens of times higher than those materials. These results suggest that MoS<sub>2</sub> nanosheets have the potential to be an efficient <em>IRZ</em> reactive material for <em>in situ</em> remediation of Hg in contaminated groundwater.</p></div>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"264 ","pages":"Article 104347"},"PeriodicalIF":3.5000,"publicationDate":"2024-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Efficient remediation of mercury-contaminated groundwater using MoS2 nanosheets in an in situ reactive zone\",\"authors\":\"Mengxia Wang ,&nbsp;Qi Han ,&nbsp;Meng Zhang ,&nbsp;Xun Liu ,&nbsp;Bei Liu ,&nbsp;Zhongying Wang\",\"doi\":\"10.1016/j.jconhyd.2024.104347\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Mercury contamination in groundwater is a serious global environmental issue that poses threats to human and environmental health. While MoS<sub>2</sub> nanosheets have been proven promising in removing Hg from groundwater, an effective tool for <em>in situ</em> groundwater remediation is still needed. In this study, we investigated the transport and retention behavior of MoS<sub>2</sub> nanosheets in sand column, and employed the formed MoS<sub>2</sub> <em>in situ</em> reactive zone (<em>IRZ</em>) for the remediation of Hg-contaminated groundwater. Breakthrough test revealed that high flow velocity and MoS<sub>2</sub> initial concentration promoted the transport of MoS<sub>2</sub> in sand column, while the addition of Ca ions increased the retention of MoS<sub>2</sub>. In Hg removal experiments, the groundwater flow velocity did not influence the Hg removal capacity due to the fast reaction rate between MoS<sub>2</sub> and Hg. With an optimized MoS<sub>2</sub> loading, MoS<sub>2</sub> <em>IRZ</em> effectively reduced the Hg effluent concentration down to &lt;1 μg/L without apparent Hg remobilization. Additionally, flake-like MoS<sub>2</sub> employed in this study showed much better Hg removal performance than flower-like and bulk MoS<sub>2</sub>, as well as other reported materials, with the Hg removal capacity a few to tens of times higher than those materials. These results suggest that MoS<sub>2</sub> nanosheets have the potential to be an efficient <em>IRZ</em> reactive material for <em>in situ</em> remediation of Hg in contaminated groundwater.</p></div>\",\"PeriodicalId\":15530,\"journal\":{\"name\":\"Journal of contaminant hydrology\",\"volume\":\"264 \",\"pages\":\"Article 104347\"},\"PeriodicalIF\":3.5000,\"publicationDate\":\"2024-04-21\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of contaminant hydrology\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0169772224000512\",\"RegionNum\":3,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of contaminant hydrology","FirstCategoryId":"93","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0169772224000512","RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
引用次数: 0

摘要

地下水中的汞污染是一个严重的全球环境问题,对人类和环境健康构成威胁。虽然 MoS2 纳米片在去除地下水中的汞方面已被证实具有良好的前景,但仍需要一种有效的工具来对地下水进行原位修复。在这项研究中,我们研究了 MoS2 纳米片在沙柱中的迁移和滞留行为,并利用形成的 MoS2 原位反应区(IRZ)修复受汞污染的地下水。突破试验表明,高流速和 MoS2 初始浓度促进了 MoS2 在沙柱中的迁移,而 Ca 离子的加入则增加了 MoS2 的保留。在除汞实验中,由于 MoS2 与汞的反应速度快,地下水流速并不影响除汞能力。在优化 MoS2 负载的情况下,MoS2 IRZ 能有效地将汞出水浓度降至 1 μg/L,且无明显的汞再移动现象。此外,与花状和块状 MoS2 以及其他已报道的材料相比,本研究中使用的片状 MoS2 具有更好的除汞性能,除汞能力是这些材料的几倍到几十倍。这些结果表明,MoS2 纳米片有可能成为一种高效的 IRZ 反应材料,用于对受污染地下水中的汞进行原位修复。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Efficient remediation of mercury-contaminated groundwater using MoS2 nanosheets in an in situ reactive zone

Efficient remediation of mercury-contaminated groundwater using MoS2 nanosheets in an in situ reactive zone

Mercury contamination in groundwater is a serious global environmental issue that poses threats to human and environmental health. While MoS2 nanosheets have been proven promising in removing Hg from groundwater, an effective tool for in situ groundwater remediation is still needed. In this study, we investigated the transport and retention behavior of MoS2 nanosheets in sand column, and employed the formed MoS2 in situ reactive zone (IRZ) for the remediation of Hg-contaminated groundwater. Breakthrough test revealed that high flow velocity and MoS2 initial concentration promoted the transport of MoS2 in sand column, while the addition of Ca ions increased the retention of MoS2. In Hg removal experiments, the groundwater flow velocity did not influence the Hg removal capacity due to the fast reaction rate between MoS2 and Hg. With an optimized MoS2 loading, MoS2 IRZ effectively reduced the Hg effluent concentration down to <1 μg/L without apparent Hg remobilization. Additionally, flake-like MoS2 employed in this study showed much better Hg removal performance than flower-like and bulk MoS2, as well as other reported materials, with the Hg removal capacity a few to tens of times higher than those materials. These results suggest that MoS2 nanosheets have the potential to be an efficient IRZ reactive material for in situ remediation of Hg in contaminated groundwater.

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Journal of contaminant hydrology
Journal of contaminant hydrology 环境科学-地球科学综合
CiteScore
6.80
自引率
2.80%
发文量
129
审稿时长
68 days
期刊介绍: The Journal of Contaminant Hydrology is an international journal publishing scientific articles pertaining to the contamination of subsurface water resources. Emphasis is placed on investigations of the physical, chemical, and biological processes influencing the behavior and fate of organic and inorganic contaminants in the unsaturated (vadose) and saturated (groundwater) zones, as well as at groundwater-surface water interfaces. The ecological impacts of contaminants transported both from and to aquifers are of interest. Articles on contamination of surface water only, without a link to groundwater, are out of the scope. Broad latitude is allowed in identifying contaminants of interest, and include legacy and emerging pollutants, nutrients, nanoparticles, pathogenic microorganisms (e.g., bacteria, viruses, protozoa), microplastics, and various constituents associated with energy production (e.g., methane, carbon dioxide, hydrogen sulfide). The journal''s scope embraces a wide range of topics including: experimental investigations of contaminant sorption, diffusion, transformation, volatilization and transport in the surface and subsurface; characterization of soil and aquifer properties only as they influence contaminant behavior; development and testing of mathematical models of contaminant behaviour; innovative techniques for restoration of contaminated sites; development of new tools or techniques for monitoring the extent of soil and groundwater contamination; transformation of contaminants in the hyporheic zone; effects of contaminants traversing the hyporheic zone on surface water and groundwater ecosystems; subsurface carbon sequestration and/or turnover; and migration of fluids associated with energy production into groundwater.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信