From an environmental and resource management perspective, it is preferable to recover and reuse heavy metal ions found in electroplating wastewater. The discharge of electroplating wastewater has caused serious environmental pollution and resource waste. Ca-based layered double hydroxides (LDHs) stabilizers are designed, which show a rapid, effective, and adequate capacity exceeding 400 mg/g against solutions of Cu²⁺, Zn²⁺, Co²⁺, and Ni²⁺ ions through an isomorphous substitution mechanism. The needs of plant development were met by the use of CaAl-LDH in soil remediation. While Cu resources can be recovered from the CuAl-LDH products by electrolysis, the final mineralization products from Ni²⁺ and Zn²⁺ ions showed exceptional performance in visible-light-induced photocatalytic reduction of CO₂ with excellent selectivity (98.7% toward CO and CH₄) and the removal of arsenite ions (99.97%). The results of this investigation revealed a feasible new approach to the removal, recycling, and reutilization of heavy metal ions.

从环境和资源管理的角度来看，最好回收和再利用电镀废水中的重金属离子。电镀废水的排放造成了严重的环境污染和资源浪费。^{设计了基于 Ca 的层状双氢氧化物 (LDHs) 稳定剂，通过对 Cu 2+}、Zn ²⁺、Co ²⁺和 Ni ²⁺离子的溶液显示出超过 400 mg/g 的快速、有效和足够的容量同构替换机制。CaAl-LDH在土壤修复中的应用满足了植物生长的需要。^{虽然可以通过电解从 CuAl-LDH 产物中回收 Cu 资源，但 Ni 2+}和 Zn的最终矿化产物²⁺离子在可见光诱导的 CO ₂光催化还原中表现出卓越的性能，具有出色的选择性（对 CO 和 CH ₄的选择性为 98.7% ）并去除亚砷酸根离子（99.97%）。这项调查的结果揭示了一种可行的新方法来去除、回收和再利用重金属离子。