Zaghbani Narjess, Hafiane Amor, Dhahbi Mahmoud
Laboratoire Eau et Technologies Membranaires, Centre de Recherche et de Technologies des Eaux, Soliman 8020, Tunisia.
J Hazard Mater. 2009 Sep 15;168(2-3):1417-21. doi: 10.1016/j.jhazmat.2009.03.044. Epub 2009 Mar 18.
Micellar-enhanced ultrafiltration (MEUF) represents a potentially attractive tool for the removal of different contaminants from wastewater. In this study, MEUF was carried out to investigate the retention of Eriochrome Blue Black R (EBBR), an anionic dye, from aqueous stream. N-Alkyltrimethylammonium bromide i.e. dodecyltrimethylammonium bromide (C(12)TAB), tetradecyltrimethylammonium bromide (C(14)TAB), cetyl-trimethylammonium bromide (C(16)TAB) and octadecyltrimethylammonium bromide (C(18)TAB) were taken as cationic surfactants, and NaCl, Na(2)SO(4), Na(2)HPO(4) as electrolytes. A hydrophilic membrane made of cellulose (molecular weight cut-off 10000 Da) was used in a cross-flow ultrafiltration unit. The removal of EBBR was studied as a function of dye and surfactant concentrations, ionic strength, transmembrane pressure and pH. The MEUF experiments showed that the highest dye rejection was about 99% for the used range of dye and surfactant concentrations. This retention depended slightly on dye and surfactant concentrations, ionic strength, pH and transmembrane pressure. However, permeate flux changed significantly with those parameters due mainly to concentration polarisation and osmotic pressure.
胶束增强超滤（MEUF）是一种从废水中去除不同污染物的潜在有效工具。在本研究中，进行了MEUF实验以研究从水流中去除阴离子染料铬蓝黑R（EBBR）的情况。选用N-烷基三甲基溴化铵，即十二烷基三甲基溴化铵（C(12)TAB）、十四烷基三甲基溴化铵（C(14)TAB）、十六烷基三甲基溴化铵（C(16)TAB）和十八烷基三甲基溴化铵（C(18)TAB）作为阳离子表面活性剂，并选用NaCl、Na(2)SO(4)、Na(2)HPO(4)作为电解质。在错流超滤装置中使用了由纤维素制成的亲水膜（截留分子量为10000 Da）。研究了EBBR的去除情况与染料和表面活性剂浓度、离子强度、跨膜压力及pH值的关系。MEUF实验表明，在所使用的染料和表面活性剂浓度范围内，对染料的最高截留率约为99%。这种截留率在一定程度上取决于染料和表面活性剂浓度、离子强度、pH值和跨膜压力。然而，渗透通量随这些参数发生显著变化，主要原因是浓差极化和渗透压。
