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Adsorption Behavior and Treatment of Mixed Surfactant Systems with lonic and Nonionic Adsorbents

离子和非离子吸附剂混合表面活性剂体系的吸附行为和处理

基本信息

批准号：
05680033
负责人：
IHARA Yasuji
金额：
$ 1.28万
依托单位：
Yamaguchi women's University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1994
项目状态：
已结题

项目摘要

The adsorption isotherms of ionic and nonionic surfactants and their mixed systems onto ionic and nonionic adsorbents were measured in aqueous solution at 25ﾟC.The ionic adsorbents used were Amberlite IRA35, IRA94 and copolymer of 4-vinylpyridine, and their modified types which introduced alkyl groups on the adsorbents. The nonionic adsorbents used were activated carbon and synthetic adsorbents.The adsorption affinities of the ionic adsorbents for sodium dodecylbenzenesulfonate (NaDBS) increased with an increase in the length of alkyl groups in adsorbents. On the other hand, the adsorption affinities for nonionic surfactants decrease with increases in both of the length of alkyl groups in the adsorbents and oxyethylene units in the adsorbates.The adsorption isotherms of NaDBS from aqueous solution onto ionic and nonionic adsorbents were measured in the presence of nonionic surfactants at 25ﾟC.The adsorption affinities of the ionic adsorbents for NaDBS in ionic surfactants decreased with increases in the ratio of nonionic surfactant to NaDBS,in comparison to the pure NaDBS solution. In same cases, the NaDBS was displaced by the nonionic surfactants in the region of higher surfactant concentration. The adsorption affinities of the nonionoc adsorbents for NaDBS increased by addition of nonionc surfactants, but decreased with increases in the ratio of nonionic surfactant to NaDBS,in comparison to the pure NaDBS solution. From the above results, the adsorption mechanism was discussed to gain the basic information about the treatment of wastewaters containing mixeddetergents.

在25 ℃水溶液中，测定了离子型和非离子型表面活性剂及其混合体系在离子型和非离子型吸附剂上的吸附等温线。所用的离子型吸附剂为Amberlite IRA 35、IRA 94和4-乙烯基吡啶共聚物，以及它们的引入烷基的改性类型。所用的非离子吸附剂为活性炭和合成吸附剂，其对十二烷基苯磺酸钠（NaDBS）的吸附亲和力随吸附剂中烷基长度的增加而增加。另一方面，在一项研究中，在25 ℃下，测定了NaDBS在离子型和非离子型吸附剂上的吸附等温线，结果表明，吸附剂对NaDBS的吸附亲和力随吸附剂中烷基链长的增加而降低，随吸附剂中含氧基团的增加而降低与纯NaDBS溶液相比，非离子表面活性剂与NaDBS的比例。在相同的情况下，在较高的表面活性剂浓度的区域中，NaDBS被非离子表面活性剂置换。非离子表面活性剂的加入增加了非离子吸附剂对NaDBS的吸附亲和力，但随着非离子表面活性剂与NaDBS的比例的增加而降低，与纯NaDBS溶液相比。根据实验结果，对吸附机理进行了初步探讨，为处理混合洗涤剂废水提供了基础资料。