近1000个入口点颗粒活性炭（GAC）过滤器正在佛罗里达州各地有效去除受污染地下水中的二溴化乙烯（EDB）。本文讨论了过滤器的设计、性能和操作问题，并评估了将GAC更换间隔从目前的六个月延长的可能性。在这些过滤器中几乎没有突破，大多数是由井水EDB浓度急剧下降期间的解吸引起的。由于文献中的GAC加载数据很好地描述了程序数据，因此将其与平衡柱模型结合使用，以预测程序过滤器在不同GAC更换周期的性能。根据最保守的估计，50%过滤器的维护可延长至每九个月一次。 包括31个参考文献、表格、图表。

Nearly 1,000 point-of-entry granular activated carbon (GAC) filters are efficiently removing ethylene dibromide (EDB) from contaminated groundwater throughout Florida. This article discusses the design, performance, and operational problems of the filters and assesses the possibility of extending the interval between GAC replacement from the current six months. Few breakthroughs have occurred in these filters, and most were caused by desorption during periods of sharp decreases in well water EDB concentrations. Because GAC loading data from the literature described the program data very well, they were used in conjunction with the equilibrium column model to predict the performance of the program's filters for different GAC replacement periods. Based on the most conservative estimates, maintenance for 50 percent of the filters could be extended to every nine months. Includes 31 references, tables, figures.