砷的去除以31%的铁为特征 伊利诺伊州的移除工厂代表了许多 上中西部地区也有类似的设施。植物 使用了不同的除铁工艺，并且有 广泛的砷、铁和总有机碳 浓度。 原水中的铁浓度是一个重要因素 砷去除的因素。砷的去除取决于 在亚砷酸盐氧化为砷酸盐的过程中 砷转化为水合氧化铁（HFO），过滤至 去除HFO和任何吸附的砷。 在当前 在工作中，可溶性砷浓度降低了 当原料中的铁浓度 水含量>3 mg/L铁。 在这两种模型中，可溶性砷的去除都得到了发展 在本研究中，假设吸附到HFO 这是从溶液中去除砷的唯一反应。 广义双层模型 砷去除预测不足，而 与表面络合作用一致的模型 并考虑了其他吸附物质的影响， 数据拟合得相当好。包括54个参考文献、表格和图表。

Arsenic removal was characterized at 31 iron removal plants in Illinois representative of many similar facilities in the upper Midwest. The plants used different iron removal processes and had a wide range of arsenic, iron, and total organic carbon concentrations. Iron concentration in raw water is an important factor in arsenic removal. Removal of arsenic depends on oxidation of arsenite to arsenate, adsorption of arsenic to hydrous ferric oxide (HFO), and filtration to remove HFO and any adsorbed arsenic. In the current work, soluble arsenic concentrations were lowered by at least 75% when the iron concentration of the raw water was > 3 mg/L Fe. In both models of soluble arsenic removal developed in this research, adsorption to HFO was assumed to be the only reaction that removes arsenic from solution. A generalized double-layer model generally underpredicted arsenic removal, whereas a parametric model that was consistent with surface complexation and accounted for the effects of other adsorbing substances, fit the data fairly well. Includes 54 references, tables, figures.