LONG-CHAIN ALKYL AND CHOLINE SUBSTITUTED XANTHATES AS EXTRACTANTS FOR CADMIUM(II)
LONG-CHAIN ALKYL AND CHOLINE SUBSTITUTED XANTHATES AS EXTRACTANTS FOR CADMIUM(II)
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DOI：
10.1016/s0277-5387(00)83440-3
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发表时间：
1994-10-01
期刊：
影响因子：
2.6
通讯作者：
ROUNDHILL, DM
中科院分区：
文献类型：
--
作者：
WOLF, N;ROUNDHILL, DM
合成了镉（Ⅱ）与黄原酸根阴离子ROCS ~（2-）（R = C_2H_5，1-C_4H_9，1-C_8H_17，1-C_18H_37和CH_2CH_2N（CH_3）~（3+））的配合物。用摩尔比法确定了镉与黄原酸盐在水溶液中的化学计量比为1：2。配合物的水溶性随着R的烷基链长度的增加而降低，但在十六烷基三甲基铵和十二烷基硫酸盐洗涤剂离子的存在下增加。胆碱取代的黄原酸盐配体可用于从土壤中电动萃取镉离子，其效率约为EDTA的10%。添加离子洗涤剂十六烷基三甲基溴化铵（CETAB）、十六烷基三甲基铵-对甲苯磺酸盐（CETATS）或十二烷基硫酸钠（SDS）使黄原酸镉的水溶性增加约20%。
The complexes of cadmium(II) with the xanthate anions ROCS2- (R = C2H5, 1-C4H9, 1-C8H17, 1-C18H37 and CH2CH2N(CH3)3+) have been synthesized. The stoichiometry of the complexes in aqueous solution has been confirmed as 1:2 for cadmium: xanthate by the mole ratio method. The aqueous solubility of the complexes decreases with increasing alkyl chain length of R, but increases in the presence of the cetyltrimethylammonium and dodecylsulphate detergent ions. The choline-substituted xanthate ligand can be used for the electrokinetic extraction of cadmium ions from soils where its efficiency is approximately 10% of that of EDTA. The addition of the ionic detergents cetyltrimethylammonium bromide (CETAB), cetyltrimethylammonium-p-toluenesulphonate (CETATS) or sodium dodecylsulphate (SDS) increases the aqueous solubility of the cadmium xanthates by some 20%.