Recent advances in the detection and removal of heavy metal ions using functionalized layered double hydroxides: a review

Industrial Chemistry & Materials Pub Date : 2022-11-17 DOI:10.1039/D2IM00024E

Wencai Liu, Yang Liu, Zhiqin Yuan and Chao Lu

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引用次数: 3

Abstract

Heavy metal pollution is one of the most severe environmental problems, possessing high ecotoxicity and health risk. Therefore, it is important to develop effective methods and corresponding materials for the detection and removal of heavy metals. Recent studies reveal the great potential of layered double hydroxides (LDHs) in detecting and removing heavy metals owing to their designable structure and tunable surface composition. In this review, we majorly discuss the recently adopted detection and removal of heavy metal ions based on LDHs. This review starts with an introduction of the structural characteristics and functionalization of LDHs. Then, the sensing tactics and mechanisms are introduced regarding LDH-based heavy metal ion detection. Based on the type of interaction, the removal of heavy metal ions with LDHs is summarized into two categories: reversible adsorption and irreversible mineralization. This review ends with a discussion on the challenges and future trends of LDH-based detectors and adsorbents for heavy metal ions.

Keywords: Heavy metal ion; Layered doubled hydroxide; Detection; Removal.

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功能化层状双氢氧化物检测和去除重金属离子的研究进展

重金属污染是最严重的环境问题之一，具有很高的生态毒性和健康风险。因此，开发有效的检测和去除重金属的方法和相应的材料是非常重要的。近年来的研究表明，层状双氢氧化物(LDHs)由于其可设计的结构和可调的表面组成，在检测和去除重金属方面具有巨大的潜力。本文综述了近年来应用于重金属离子检测与去除的LDHs技术。本文首先介绍了LDHs的结构特征和功能化。然后，介绍了基于ldh的重金属离子检测的传感策略和机理。根据相互作用的类型，将LDHs对重金属离子的去除分为可逆吸附和不可逆矿化两大类。本文最后讨论了基于ldh的重金属离子检测器和吸附剂的挑战和未来发展趋势。关键词:重金属离子;层状双氧根;检测;去除。

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Industrial Chemistry & Materials chemistry, chemical engineering, functional materials, energy, etc.-

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