Cupric (Cu(II)) complexes in industrial wastewater are responsible for the failure of conventional alkaline precipitation, but the properties of cuprous (Cu(I)) complexes at alkaline circumstance have not been focused. This report proposed a novel strategy for the remediation of Cu(II)-complexed wastewater by coupling alkaline precipitation with green benign reductant, namely, hydroxylamine hydrochloride (HA). This remediation process (HA-OH) exhibits superior Cu removal efficiency that cannot be achieved with the same dosage of oxidants (3 mM). The possibility of Cu(I) activated O₂ catalysis and self-decomplexation precipitation were investigated, and the results identified that ¹O₂ was generated from Cu(II)/Cu(I) cycle, but it was insufficient to annihilate organic ligands. Cu(I) self-decomplexation was the dominate mechanism of Cu removal. For real industrial wastewater, HA-OH process can realize the efficient Cu₂O precipitation and Cu recovery. This novel strategy utilized intrinsic pollutant in wastewater without introducing other metals, complicated materials, and expensive equipment, broadening the insight for the remediation of Cu(II)-complexed wastewater.

工业废水中的铜 (Cu(II)) 络合物是传统碱性沉淀失败的原因，但亚铜 (Cu(I)) 络合物在碱性环境下的性质尚未得到关注。本报告提出了一种通过将碱性沉淀与绿色良性还原剂即盐酸羟胺 (HA) 耦合来修复 Cu(II) 复合废水的新策略。这种修复过程 (HA-OH) 表现出卓越的铜去除效率，这是使用相同剂量的氧化剂 (3 mM) 无法实现的。_{考察了 Cu(I) 激活 O 2}催化和自解络沉淀的可能性，结果确定¹ O ₂由 Cu(II)/Cu(I) 循环产生，但不足以消灭有机配体。Cu(I) 自解络是 Cu 去除的主要机制。对于实际工业废水，HA-OH工艺可以实现高效的Cu ₂ O沉淀和Cu回收。这种新策略利用了废水中的固有污染物，而无需引入其他金属、复杂材料和昂贵的设备，拓宽了对 Cu(II) 复合废水修复的认识。