The extensive utilization of chromium in electroplating, leather tanning, dyeing, and other industries has resulted in significant environmental pollution. Therefore, there is a pressing need for highly efficient materials to tackle the pollution caused by Cr(VI). Throughout the study, a variety of layered double hydroxides (LDHs) were synthesized, and the NiCr-LDH showed remarkable removal properties for the heavy metal chromium. The NiCr-LDH exhibits rapid equilibrium within 60 min and possesses a maximum capacity of 218 mg/g. Notably, when exposed to visible light, the ability of NiCr-LDH to remove toxic Cr(VI) anions is significantly improved, and it is capable of treating actual electroplating wastewater to remove the Cr concentration to well below 0.5 mg/L. In-depth analysis revealed compelling evidence that the highly toxic Cr(VI) anions transformed into harmless Cr(III) anions, resulting in an improved removal efficiency.

中文翻译：

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超稳定矿化与光催化相结合，利用层状双氢氧化物材料修复 Cr(VI)


电镀、鞣革、染色等工业中铬的大量使用，造成了严重的环境污染。因此，迫切需要高效材料来解决Cr(VI)造成的污染。在整个研究过程中，合成了多种层状双氢氧化物（LDH），NiCr-LDH对重金属铬表现出显着的去除性能。 NiCr-LDH 在 60 分钟内表现出快速平衡，最大容量为 218 mg/g。值得注意的是，当暴露在可见光下时，NiCr-LDH去除有毒Cr(VI)阴离子的能力显着提高，并且能够处理实际电镀废水，将Cr浓度去除至远低于0.5 mg/L。深入分析揭示了令人信服的证据，表明剧毒的 Cr(VI) 阴离子转化为无害的 Cr(III) 阴离子，从而提高了去除效率。