本文介绍了两座采用铁基吸附介质的井口砷处理设施的设计、安装和运行的全面工程经验。目标井位于加利福尼亚州洛杉矶县的一个城区。经批准的砷处理技术，如IX、AA或混凝/MF，不适用于那些小型场所，因为它们需要很大的空间，以及居住区的化学/盐水/污泥处理。小型中试研究表明，带有铁基吸附介质的压力容器为受试场地的砷处理提供了可行的解决方案。 根据中试研究的结果，为两个完整的处理设施选择了粒状氢氧化铁和其他类似的铁基吸附介质。由于目标井也含有高锰，因此在砷处理之前，选择了软锰矿介质的同时除锰工艺。项目已在建设中，将于2001年4月开始正常运行和监测。砷和锰的去除有望实现。该处理设施的资本成本不到现有最佳砷处理技术的三分之一。 根据联邦和加利福尼亚州的测试程序，预计介质将作为无害废物处理。包括表格、数字。

This paper presents full-scale project experiences of design, installation and operation of two wellhead arsenic treatment facilities using iron-based adsorption media. The subject wells are located in an urban area in Los Angeles County, California. Approved arsenic treatment technologies such as IX, AA, or Coagulation/MF are not suitable for those small sites due to large space requirements as well as chemical/brine/sludge handling in a residential neighborhood. The small-scale pilot study indicated that a pressure vessel with the iron-based adsorption media provides a feasible solution for arsenic treatment at the subject sites. Based on the results of the pilot study, granular ferric hydroxide and other similar iron-based adsorption medias were selected for two full-scale treatment facilities. Since the subject wells also have high manganese, a concurrent manganese removal process by Pyrolusite media was selected prior to arsenic treatment. Projects have been under construction and normal operation and monitoring will start April 2001. Both arsenic and manganese removal is expected to be achieved. The capital cost of the treatment facility is less than one third of the Best Available Technologies for arsenic treatment. The media is expected to be disposed of as non-hazardous waste per federal and California testing procedures. Includes tables, figures.