1992年和1993年，加州一家公用事业公司的设施对强化混凝去除砷的可能性进行了研究。试验在两个水源的试验台、中试和示范规模下进行。明矾和三氯化铁与阳离子聚合物在不同的进水砷浓度下进行了研究。研究人员得出结论，对于测试的源水，强化混凝可以有效去除砷，并且在重量基础上，需要比明矾更少的三氯化铁才能达到相同的去除效果。包括23个参考文献、表格和图表。

The possible use of enhanced coagulation for arsenic removal was examined at the facilities of a California utility in 1992 and 1993. The tests were conducted at bench, pilot, and demonstration scales, with two source waters. Alum and ferric chloride, with cationic polymer, were investigated at various influent arsenic concentrations. The investigators concluded that for source waters tested, enhanced coagulation could be effective for arsenic removal and that less ferric chloride than alum, on a weight basis, is needed to achieve the same removal. Includes 23 references, tables, figures.