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用十六烷基三甲基氯化铵(1631)、十八烷基三甲基氯化铵(1831)阳离子表面活性剂分别与四乙烯五胺(TEPA)、二乙基二硫代氨基甲酸钠(DDTC)复合改性哈密膨润土,制得系列改性膨润土吸附材料。FT-IR、XRD和TGDTA等表征结果表明,改性及有机复合改性膨润土的层间距显著增大。以新疆新鑫冶炼厂实际废水为吸附研究对象,研究发现,当改性膨润土投加量为25g/L、pH为9.0、吸附时间为60min时,有机改性膨润土对冶炼废水中Cu~(2+)、Ni~(2+)的去除率可达78%左右,而有机复合改性膨润土对废水中Cu~(2+)、Ni~(2+)的去除率最高可达95%以上,若吸附条件控制得当,经有机复合改性膨润土处理后的冶炼废水,其Cu~(2+)、Ni~(2+)的含量可达到国家排放标准。
Cetyltrimethylammonium chloride (1631) and octadecyltrimethylammonium chloride (1831) cationic surfactants were respectively mixed with tetraethylenepentamine (TEPA), sodium diethyldithiocarbamate (DDTC) composite modified Hami Bentonite, a series of modified bentonite adsorption material. The characterization results of FT-IR, XRD and TGDTA showed that the interlayer spacing of the modified and organic composite modified bentonites increased significantly. The results show that when the modified bentonite dosage is 25g / L, the pH is 9.0 and the adsorption time is 60min, the organic modified bentonite has good effect on Cu ~ (2) +), The removal rate of Ni ~ (2+) can reach about 78%, while the removal rate of Cu 2+ and Ni 2+ by the organic composite modified bentonite can reach more than 95% If the adsorption conditions are properly controlled, the content of Cu 2+ and Ni 2+ in the smelting wastewater treated with organic composite modified bentonite can meet the national emission standards.