The issue of arsenic contamination, specifically in the form of As(III), is progressively escalating, so presenting a substantial danger to human well-being and security. In this study, commercially industrially produced CaAl-layered double hydroxides (CaAl-LDH) and MgAl-LDH were processed by calcination to produce a series of LDH-based mixed metal oxides (CaAl-, MgAl-) at calcination temperatures () ranging from 200 to 1000 °C. The resulting CaAl-900 exhibited a remarkable capacity for removing high concentrations of As(III), with a removal capacity of 612.5 mg/g. Besides, MgAl-500 demonstrated effective removal of low levels of As(III) to meet industrial emission standards, specifically below 0.5 mg/L. Furthermore, MgAl-500 was employed to simultaneously stabilize mixed toxic metals (As(III), Pb(II), and Cd(II) ions) in the treatment process of contaminated water, meeting standard levels. The comprehensive analysis of the characterization data indicated that the key determinant for the remarkable capacity of CaAl-900 to remove As(III) was its surface adsorption and memory effect. MgAl-500 also formed complex compounds through formation of As-O-Mg bond. This research showcases the capacity of LDHs produced from the industry for efficient remediation of As(III) ions in water.

中文翻译：

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使用工业化层状双氢氧化物及其衍生物对砷污染水进行超稳定矿化


砷污染问题，特别是砷（III）污染，正在逐步升级，对人类福祉和安全构成重大威胁。在这项研究中，商业化工业生产的CaAl-LDH和MgAl-LDH经过煅烧处理，在煅烧温度（）范围内生产了一系列基于LDH的混合金属氧化物（CaAl-，MgAl-） 200 至 1000°C。所得CaAl-900表现出卓越的去除高浓度As(III)的能力，去除能力为612.5 mg/g。此外，MgAl-500 可以有效去除低含量的 As(III)，满足工业排放标准，特别是低于 0.5 mg/L。此外，在污水处理过程中，采用MgAl-500同时稳定混合有毒金属（As(III)、Pb(II)和Cd(II)离子），达到标准水平。对表征数据的综合分析表明，CaAl-900具有卓越的除As(III)能力的关键决定因素是其表面吸附和记忆效应。 MgAl-500 还通过形成 As-O-Mg 键形成复杂化合物。这项研究展示了工业生产的 LDH 有效修复水中 As(III) 离子的能力。