Copper(II) removal from wastewaters by a new synthesized selective extractant and SLM viability
Copper(II) removal from wastewaters by a new synthesized selective extractant and SLM viability
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DOI：
10.1021/ie030392t
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发表时间：
2004-01-21
影响因子：
4.2
通讯作者：
Argurio, P
中科院分区：
文献类型：
--
作者：
Molinari, R;Poerio, T;Argurio, P
通过使用一种新的螯合剂，即 2-羟基-5-十二烷基苯甲醛 (2-H-5-DBA) 分子，研究了从废水（例如污染土壤的洗涤水中）中去除和/或回收铜 (II)，该螯合剂以前从未用作金属离子的配体。这种材料是通过改进文献报道的方法来设计和合成的，获得了非常高的产率（80% vs 19%）。研究了工艺选择性和支持液膜 (SLM) 的可行性。该工艺的操作条件和选择性是通过使用煤油作为溶剂在不同载体浓度（10%、30% 和 50% v/v）下进行的 L-L 萃取测试得出的。在 50% v/v 载体浓度和 pH 5 下，Cu2+ 相对于 Ni2+、Zn2+ 和 Mn2+ 的分离选择性分别为 4.25、315.0 和 280.0。载体浓度对 SLM 工艺的可行性有很大影响：事实上，通过增加载体浓度，可以降低操作 pH 值，从而避免进料相中的铜沉淀。带材中 Cu2+ 的富集系数（[Cu2+]（带材）/[Cu2+]（进料））（最终）为 23.5。
Copper(II) removal and/or recovery from wastewaters, e.g., washing water of contaminated soils, was investigated by using a new chelant, the molecule 2-hydroxy-5-dodecylbenzaldehyde (2-H-5-DBA), never used before as a ligand for metal ions. This material was designed and synthesized by improving a method reported in the literature, obtaining a very high yield (80 vs 19%). Process selectivity and supported liquid membrane (SLM) viability were studied. The operating conditions and selectivity of the process were found by means of L-L extraction tests performed at different carrier concentrations (10, 30, and 50% v/v) using kerosene as the solvent. At 50% v/v carrier concentration and pH 5, the selectivities of Cu2+ separation vs Ni2+, Zn2+, and Mn2+ were 4.25, 315.0, and 280.0, respectively. The carrier concentration had a strong influence on the viability of the SLM process: indeed, by increasing the concentration of the carrier, the operating pH could be decreased, thereby avoiding copper precipitation in the feed phase. The enrichment factor of Cu2+ in the strip ([Cu2+](strip)/[Cu2+](feed))(final) was 23.5.