层状双氢氧化物
水溶液中的金属离子
离子半径
金属
吸附
无机化学
离子
价(化学)
化学
重金属
材料科学
环境化学
氢氧化物
有机化学
作者
He Xin,Xinhong Qiu,Chen-Yan Hu,Yawen Liu
标识
DOI:10.1080/01932691.2017.1392318
摘要
Heavy metal ions are toxic, and their toxicities change with different valence states, charges, and radii. Among the methods used for heavy metal ion removal, adsorption is widely employed due to its low cost and simple operation. As natural anionic clays, layered double hydroxides (LDHs) have drawn considerable attention for their use in the removal of anionic pollutants (such as heavy metal anions) due to their high removal efficiency and environmental friendliness. This article reviews the effects of the charge, type, and radius of the cations in the laminates of LDHs and the anions in the LDH interlayers, as well as the charge and radius of the heavy metals and the conditions (such as pH, coexisting ions, and temperature) on removing heavy metal ions with LDHs. The removal mechanisms have also been discussed. LDHs are hugely promising as an application for removing heavy metal ions that exist in different ionic forms by controlling the type and condition of LDHs.
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