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介绍了氧化铝涂层石英砂和未涂层石英砂对微污染原水进行直接过滤的研究结果：无论对浊度，还是对有机物的综合去除，氧化铝涂层砂滤料过滤效果均明显优于未涂层砂滤料。
The results of direct filtration of micro-polluted raw water with alumina-coated quartz sand and uncoated quartz sand are presented. The results show that the filter effect of alumina-coated sand filter is superior to that of turbidity and organic matter removal. Uncoated sand filter.