苯酚、苯胺对吸附胶束絮凝过程的影响

吸附胶束絮凝(AMF)法可用于去除水体中的各种污染物,为了对其处理过程中的行为加以控制,以阴离子表面活性剂SDS和铝盐为模型,通过Zeta电位、表面张力和平均粒度等分析方法,研究了吸附胶束絮凝法对苯酚、苯胺的分离去除及苯酚、苯胺对其吸附胶束絮凝过程的影响。结果表明:苯酚的存在没有对表面活性剂胶束的絮凝产生明显的影响,由于Al3+的存在,推测苯酚以络合物的形式吸附在胶束的斯特恩层,并可通过铝盐对胶束的絮凝而与水相分离去除,其去除率在40%~50%左右。而极少量的极性有机物苯胺可使表面活性剂胶束的絮凝发生较大改变,推测苯胺的存在抑制了絮凝胶团的形成。当苯胺浓度低于100 mg/L时,苯胺的去除率可达90%左右。该研究为胶束絮凝分离溶解性有机物提供了实验参考。

Effect of Phenol and Aniline on Adsorptive Micellar Flocculation

Adsorptive micellar flocculation(AMF) is a method for the removal of pollutants from water.To control its behaviors in disposal process,the removal of phenol and aniline by AMF and influence of phenol and aniline on AMF of the anionic surfactant sodium dodecyl sulfate with Al3+ by ζ potential,surface tension,and Z-average size were studied.Results indicated that the flocculation was only slightly affected by the presence of phenol.Phenol may adsorb as complexes within the Stern-diffuse layer due to the excess of Al3+,and could be removed by the flocculation of micelles by Al3+,with the removal rate about 40%~50%.However,very small amounts of polar organic compound aniline had great effects on the flocculation of surfactant micellar,and the existence of aniline inhibited the formation of flocculation.As the concentration of aniline was lower than 100 mg/L,the removal rate was up to 90%,and reduced with the increasing concentration of aniline.The study would provide the experimental reference for separation of soluble organic by micelle flocculation.