2000年6月，环境保护局提出了砷的新MCL为5 ppb。尽管环境保护局目前正在接受对这项极具争议的新法规的评论，但它预计最终确定的规则将被设定为10 ppb甚至更低，这对任何规模的数千家公用事业公司构成了重大的技术挑战。混凝辅助膜法（CAMPs），尤其是低压膜法，被认为是最有前途的脱砷技术，因为它可以应用于多种水质，包括含有高浊度（地表水）、铁和锰以及其他阴离子（如硫酸盐和硝酸盐）的水。 和离子交换和活化氧化铝相比，营地需要的化学品更少，产生的废物也非常少。本文将展示由美国科学研究伙伴关系资助的一个示范项目的结果。为了充分展示CAMP的长期性能，该项目同时评估了多种膜。为了充分利用膜的固液分离能力，本研究将研究浸没式膜与新型吸附剂的耦合。此类吸附剂包括:加热氧化铁颗粒（HIOP）；粉末活性氧化铝（- Al2O3）；粉末二氧化锰（MnO2）；以及磁浸渍离子交换介质，如MIEXTM。这是首次对同一地点（蒙大拿州比林斯市和亚利桑那州图森市）全年运行的各种膜技术进行大规模对比。本文介绍了2000年3月至8月在比林斯进行的第一阶段研究的数据。这项研究的其他部分的结果将于2001年晚些时候在其他地方发表。包括表格，数字。

EPA proposed a new MCL of 5 ppb for arsenic in June 2000. Although EPA iscurrently accepting comments on this highly debatable new regulation, it isanticipated that the finalized rule will be set at 10 ppb or even lower, posing asignificant technological challenge to thousands of utilities at any size.Coagulation assisted membrane process (CAMPs), particularly for low pressuremembranes, is considered the most promising technology for arsenic removalbecause it can be applied to a wide range of water qualities, including waterthat contains high turbidity (for surface water), iron and manganese, and otheranions, such as sulfate and nitrate. Compared to ion exchange and activatedalumina, CAMPs require fewer chemicals and generate very small quantities ofwaste. This paper will present results from a demonstration project funded by theArsenic Research Partnership. To fully demonstrate the long-term performance ofCAMP, this project evaluated a wide variety of membranes at the same time. Totake the full advantage of a membranes' capability in solid/liquid separation,immersed membranes coupled with novel adsorbents will be investigated as part ofthis study. Such adsorbents include: heated iron oxide particles (HIOPs);powdered activated alumina ( -Al2O3); powdered manganese dioxide (MnO2); and,magnet- impregnated ion exchange media such as MIEXTM. This full-scale pilottesting is the first large-scale head-to-head comparison of a wide range ofpromising membrane technologies operating year-round at the same sites (Billings,Montana & Tucson, Arizona) simultaneously. This paper presents data from thefirst phase of the study done at Billings from March through August, 2000. Resultsfrom other parts of this study will be presented elsewhere later in 2001. Includes table, figures.