期刊论文

Extraction of Cu~(2+) and Ni~(2+) with phosphorate derivates of carboxyl calix[6] arene (HHPHC)

Wang, J.

中文

环境工程学报

1673-9108

2017

11

2

915-920

10.12030/j.cjee.201509078

国家自然科学基金资助项目（21177053）； 南华大学科技创新团队项目（NHCXTD07）；

本校为第一且通讯机构

合成了萃取剂羧基化杯[6]芳烃磷氧衍生物,即5, 11, 17, 23, 29, 35-六羧基-37, 38, 39, 40, 41, 42-六氧磷酸二乙酯杯[6]芳烃(HHPHC), 并对其进行了红外表征,考察了溶液初始pH值、萃取时间、重金属离子初始浓度、萃取温度对HHPHC萃取重金属离子(Cu~(2+)、Ni~(2+))的影响。结果表明,HHPHC萃取Cu~(2+)和Ni~(2+)的最佳温度均为30 ℃,最佳pH值均为5.0,且15 min基本达到萃取平衡,适宜处理低浓度重金属废水。准二级动力学模型(R~2 > 0.94)和Freundlich等温模型(R~2 > 0.999)均可拟合其萃取过程,Gibbs自由能(ΔG~0)和焓变(ΔH~0)值均小于0,表明萃取反应是一个自发的放热反应。

A, 5, 11, 17, 23, 29, 35-hexacarboxy-37, 38, 39, 40, 41, 42-hexaoxygen-diethyl phosphate calix[6]arene (HHPHC) extractant was synthesized. IR spectroscopy was used to characterize the compounds. The effects of the pH, initial Cu2+ and Ni2+ concentrations, extraction time, and extraction temperature on the extraction of Cu2+ and Ni2+ using HHPHC were investigated. The results showed that the maximum extraction was attained under the following conditions: pH 5.0, low initial Cu2+ and Ni2+ concentrations, an extraction time of 15 min, and an extra...