自2006年1月23日起生效，最高污染物水平 砷（As）的（MCL）将从50微克/升降至10微克/升， 而为了满足新的MCL，移除As的成本预计将增加 美国公用事业每年2-7亿美元。这些合规成本将 如果像去除技术一样具有创新性，将大大降低成本 经过验证和实施。使用jar测试协议，本研究 评估了常规混凝/沉淀的性能， 微压载混凝，混凝辅助 微滤、微滤和压载混凝/微滤 比较创新凝固法的相对有效性- 基于As去除的处理工艺。 各种技术 在模拟各种环境的水域中进行评估 常见的地表水和地下水条件。 微观和镇流混凝提供了有希望的 在模拟水的实验室规模试验中去除；然而，没有 当它被用作药物时，观察到了协同效应 对微滤进行预处理。聚合物至关重要 对微压载混凝性能的影响 过程虽然通常提供混凝/微滤 在给定的铁剂量下，最佳的去除效果是微重力和压载 凝固过程可能是一种有前途的替代方法 如果其较低的预计资本和 运营成本被证明是有效的。以最低成本筛选公用事业 作为去除技术，以满足MCL可能提出的新要求 发现该方案有助于评估潜在治疗 技术。包括10个参考文献、表格和图表。

Effective Jan. 23, 2006, the maximum contaminant level (MCL) for arsenic (As) will be reduced from 50 to 10 ug/L, and removing As to meet the new MCL is anticipated to cost US utilities $0.2-0.7 billion per year. These compliance costs will be greatly reduced if innovative As-removal technologies are proven and implemented. Using a jar-test protocol, this study evaluated the performance of conventional coagulation/sedimentation, microsand-ballasted coagulation, coagulation-assisted microfiltration, and microsand-ballasted coagulation/microfiltration to compare the relative effectiveness of innovative coagulation- based treatment processes on As removal. The various technologies were evaluated in waters that simulated a variety of common surface water and groundwater conditions. Microsand-ballasted coagulation provided promising As removal in bench-scale tests of simulated waters; however, no synergistic benefits were observed when it was used as a pretreatment to microfiltration. Polymer was critically important to the performance of the microsand-ballasted coagulation process. Although coagulation/microfiltration typically provided the best As removal at a given iron dose, microsand-ballasted coagulation processes are likely to be a promising alternative method of As treatment if their lower projected capital and operating costs are proven valid. Utilities screening for least-cost As-removal techniques to meet the new As MCL may find this protocol useful in evaluating potential treatment technologies. Includes 10 references, tables, figures.