改性麦饭石去除饮用水中的砷

Removal of Arsenic in Drinking Water by Modified Maifanite Adsorption

饮用水中砷超标会严重危害人的身体健康。该文利用MnO2对麦饭石进行改性,制备了一种高效的吸附剂;同时研究了在不同pH值、接触时间、改性麦饭石的投加量及砷的初始浓度条件下,改性麦饭石对饮用水中As(V)的去除。研究结果表明:在以上不同条件下,改性麦饭石对水中As(V)均有一定的去除效果。当pH值为6、接触时间为60 min、改性麦饭石投加量为1 000 mg/L、水中As(V)的初始浓度为100μg/L时,改性麦饭石对饮用水中的As(V)的去除率为91%,此时水中砷的含量低于国家生活饮用水卫生标准(10μg/L)。

Excessive arsenic in drinking water would seriously endanger people＇s health. MnO2 was used to modify maifanite which prepared a high efficient adsorbent. At the same time, the removal effect of As（V） in water at different pH value, contact time, dosage of modified maifanite and the initial concentration of arsenic was studied. The results show that, under the above different conditions, As（V） have certain removal effect when modification of maifanite was used in water. The removal rate of As（V） was 91% when the dosage of modified maifanite was 1 000 mg/L, pH of water, contact time and the initial concentration of As（V） were 6, 60 rain and 100μg/L respectively. Then the arsenic content in water is lower than the national drinking water health standard （10 μg/L）.