摘要
本文研究了新型螯合型表面活性剂N-十二酰基乙二胺三乙酸钠(N-LED3A)对多环芳烃(PAHs)的增溶作用,比较了N-LED3A与常见阴离子表面活性剂十二烷基苯磺酸钠(SDBS)和十二烷基硫酸钠(SDS)增溶菲的性能,并测试了N-LED3A的螯合能力.结果表明,N-LED3A对萘、菲和芘都有增溶作用,胶束增溶作用显著,增溶程度的大小顺序为芘>菲>萘;N-LED3A、SDBS和SDS对菲的质量增溶比(WSR)分别为2.9×10-3、3.5×10-3和7.7×10-3,表明SDS的增溶能力最强,N-LED3A和SDBS的增溶能力相近;N-LED3A螯合Ca2+离子的能力与其浓度有关,浓度高于CMC时螯合能力较强.
The capabilities of a novel chelating surfactant, sodium N-lauroyl ethylenediamine triacetate （N-LED3A）, for naphthalene, phenanthrene and pyrene solubilization were studied. A comparison on water solubility enhancement of phenanthrene between N-LED3A, sodium dodecyl benzene sulfonate （SDBS） and sodium dodecyl sulfate （SDS） was conducted. Chelating ability of N-LED3A was investigated by measurement of chelation values with Ca（ Ⅱ ） at different concentrations. The experiment results demonstrated that water solubilities of naphthalene, phenanthrene and pyrene were efficiently enhanced by N-LED3A especially when its concentration was above the critical micelle concentration （CMC）. The order of solubilizing extent was pyrene 〉 phenanthrene 〉naphthalene. The weight solubilization ratios （WSR） of N-LED3A, SDBS and SDS for phenanthrene solubility enhancement were 2.9 × 10^-3, 3.5 × 10^-3 and 7.7×10^-3, respectively, which indicated that solubilization capacity of SDS for phenanthrene was the strongest among the three anionic surfactants, while those of N-LED3A and SDBS were similar. Chelating N-LED3A was dependent on its concentration. The chelation value （CV） was larger when dosage exceeds its CMC. ability of N-LED3A
出处
《环境化学》
CAS
CSCD
北大核心
2015年第7期1304-1309,共6页
Environmental Chemistry
基金
国家自然科学基目(41261077)
甘肃省自然科学基金(1010RJZA070)资助
关键词
螯合型表面活性剂
多环芳烃
增溶作用
螯合作用.
chelating surfactant, polycyclic aromatic hydrocarbon, solubilization, chelation.
