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发明公开
CN1751783A 去除水中砷的复合吸附材料及其制备方法 有权 转让

去除水中砷的复合吸附材料及其制备方法
摘要：
去除水中砷的复合吸附材料及其制备方法，涉及一种除砷吸附剂及制备方法。由活性炭与氧化铁复合而成的本发明的复合吸附材料的砷吸附量是活性炭的2－5倍。先将水洗后的活性炭在90℃下保温24小时，干燥。然后加入硝酸中，搅拌均匀，放置4小时后，水洗，并在95～100℃下干燥24小时待用。将FeSO4·7H2O和FeCl3·6H2O加水溶解后，加入5mol/l的NaOH中，搅拌，在70℃生成氧化铁沉淀，用NaOH滴定到溶液pH＝9～10；用水洗涤，再加入月桂酸，同时滴加NaOH，搅拌10分钟，加热到90℃，恒温30分钟。调整pH＝4～5。将活性炭与氧化铁悬浮液混合，搅拌制成本发明的高容量、高选择性和高吸附率、高机械强度、可再生和低成本的复合吸附材料。本发明工艺简单，操作方便，污泥渣产生量少。可有效去除水中砷或其他重金属。
摘要（英）：

A composite adsorption material for removing As from water is prepared from activated carbon and iron oxide through washing activated carbon by water, heating, drying, adding it to nitric acid, stirring, laying aside, water washing, drying, dissolving FeSO4*7H2O in water, adding it to NaOH solution, stirring to generate iron oxide deposit, using NaOH to regulate pH=9-10, water washing, adding lauric acid, dripping NaOH while stirring, heating to make pH=4-5, mixing said activated carbon with the suspension of iron oxide, and stirring. It has high capacity, selectivity, adsorptivity and mechanical strength.

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