本研究评估了一个全规模（106 mgd）常规处理厂对自然砷的去除情况。用3-10 mg/L的三氯化铁或6、10或20 mg/L的明矾处理水源水时，砷去除率分别为81-96%（三氯化铁）和23-71%（明矾）。本研究中产生的污泥中的金属浓度在所有混凝剂剂量下均低于该州当前的危险废物水平。没有遇到任何操作困难。包括24个参考文献、表格和图表。

This study evaluated the removal of naturally occurring arsenic in a full-scale (106-mgd) conventional treatment plant. When the source water was treated with 3-10 mg/L of ferric chloride or 6, 10, or 20 mg/L of alum, arsenic removal was 81-96 percent (ferric chloride) and 23-71 percent (alum). Metal concentrations in the sludge produced during this study were below the state's current hazardous waste levels at all coagulant dosages. No operational difficulties were encountered. Includes 24 references, tables, figures.