初步的中试规模调查表明，纳滤和反渗透膜可以有效去除南加州水源地大都会水域中的甲基叔丁基醚（MTBE）和高氯酸盐。纳滤膜和反渗透膜对MTBE和高氯酸盐的去除率分别超过97%和80%。对254 nm处吸收的紫外线（UV254）、总有机碳（TOC）、电导率、浊度和颗粒计数数据的检查结果表明，这两种膜产生的渗透水水质可接受。然而，MTBE截留研究发现，两种膜产生的渗透液中甲苯含量较低。包括14个参考文献、表格和图表。

Preliminary pilot-scale investigations demonstrate that nanofiltration and reverse osmosis membranes can effectively remove methyl tertiary-butyl ether (MTBE) and perchlorate form the Metropolitan Water District of Southern California's source waters. Nanofiltration and reverse osmosis membranes consistently removed greater than 97% and 80% of the applied MTBE and perchlorate, respectively. Examination of results for ultraviolet light absorbed at 254 nm (UV254), total organic carbon (TOC), conductivity, turbidity, and particle count data indicated that both membranes produced permeates with acceptable water quality. However, low toluene levels were detected in the permeate produced from both membranes from MTBE rejection studies. Includes 14 references, tables, figures.