Highly selective removal of Ni(II) from plating rinsing wastewaters containing [Ni-xNH(3)-yP(2)O(7)](n) complexes using N-chelating resins

文献类型： 外文期刊

第一作者： Ling, Chen

作者： Ling, Chen;Ren, Zixi;Cheng, Yuwei;Ling, Chen;Wei, Mengmeng;Liu, Fuqiang;Tong, Fei;Zhang, Xiaopeng

作者机构：

关键词： Heavy metal ions; Non-cyanide plating; Combined adsorption; Complexation; Polyamine group

期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：10.588； 五年影响因子：10.129 ）

ISSN： 0304-3894

年卷期： 2020 年 398 卷

页码：

收录情况： SCI

摘要： Inorganic complexants, such as ammonia (AA) and pyrophosphate (PP), are often present alongside heavy metal ions in alkaline plating rinsing wastewater. We investigated the removal capacity of Ni(II) from waters con-taining [Ni-xNH(3)-yP(2)O(7)](n) complexes by chelating and ion-exchange resins in sole and dual-ligand systems. D463 (containing iminodiacetic groups) and PAMD (possessing polyamine groups) exerted superior performance under all conditions. Ni(II) adsorption on D463 decreased with AA and PP by 10.3% and 64.4%, respectively. Conversely, the adsorption on PAMD increased by 57.3% and 75.8%, respectively. PAMD exhibited high se-lectivity toward anionic [Ni-PP] species over free PP. More Ni(II) was captured by PAMD in the dual-ligand systems than sole systems, while the case for D463 was opposite. As confirmed by species tracking and DFT/XPS analyses, complexes breaking-Ni2+ capture was the dominant mechanism for D463, while the dual-site (non-charged and protonated amines) interactions with NiP2O72- on PAMD promoted its adsorption. The tandem combination D463-PAMD was the optimal mode to remove the most Ni(II). The actual wastewater test de-monstrated that > 210 BV effluent met the limit of 0.1 mg Ni(II)/L and the eluent contained 15 g Ni(II)/L. This study guides the application of chelating adsorption processes in the advanced treatment of plating rinsing wastewaters.

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