Metal-organic framework DUT-67 (Zr) for adsorptive removal of trace Hg2+ and CH3Hg+ in water

Q3 Chemical Engineering

Chemical Speciation and Bioavailability Pub Date : 2018-01-01 DOI:10.1080/09542299.2018.1509020

Sha Chen, Fan Feng, Sumei Li, Xiao-Xin Li, Lun Shu

引用次数: 18

Abstract

ABSTRACT A Zr-based stable metal-organic frameworks DUT-67 (Zr) was successfully synthesized as an adsorbent to remove trace mercury and methylmercury ions in aqueous solution. The removal efficiency of 90% and 55% of Hg2+ and CH3Hg+ was respectively achieved at pH 6 and 55°C. The S in thiophene has a relatively weak adsorption capacity for mercury and there could be the slight π-complexation between thiophere ring of DUT-67 (Zr) and Hg2+ besides physical absorption, while there only was physical adsorption between DUT-67 (Zr) and CH3Hg+. The developed methods were applied to remove trace Hg2+ and CH3Hg+ in the real water samples, and the removal efficiency was from 69% to 90% and from 30% to 77% respectively; when the concentrations of Hg2+ was lower than 20 μg L−1 in the samples, the remaining mercury concentration was lower than 1 μg L−1，which can meet the standard of the World Health Organization.

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金属有机骨架DUT-67 (Zr)吸附去除水中痕量Hg2+和CH3Hg+

摘要成功合成了一种锆基稳定金属有机骨架DUT-67（Zr），作为去除水溶液中痕量汞和甲基汞离子的吸附剂。在pH 6和55°C下，Hg2+和CH3Hg+的去除率分别达到90%和55%。噻吩中的S对汞的吸附能力相对较弱，除了物理吸附外，DUT-67（Zr）的硫环与Hg2+之间可能存在轻微的π-络合，而DUT-67与CH3Hg+之间仅存在物理吸附。将所开发的方法应用于实际水样中痕量Hg2+和CH3Hg+的去除，去除率分别为69%至90%和30%至77%；当样品中Hg2+浓度低于20μg L−1时，剩余汞浓度低于1μg L–1，可以满足世界卫生组织的标准。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Chemical Speciation and Bioavailability 环境科学-毒理学

CiteScore

1.62

自引率

0.00%

发文量

审稿时长

1 months

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