改性凹凸棒处理污水中有机污染物的研究

Study on removal of organic substances in sewage by modified attapulgite

在不同改性条件下,用盐酸,氯化钠以及高温焙烧来改性凹凸棒原土,用改性后的凹土分别处理水中阴离子洗涤剂(LA S),色度,苯酚,氨氮并确定出最佳条件。比较三种凹土改性方法。最后得处理LA S时氯化钠改性凹土效果最好,最佳改性浓度为2.5 m o l/L,去除率73%。处理苯酚、氨氮时盐酸改性凹土效果最好,最佳改性浓度保持在2 m o l/L附近,去除率分别可达到87%,92%。焙烧温度达500℃时,凹土对色度的吸附能力最佳,达95%。

Three ways as hydrochloric acid,sodium chloride.calcine were utilized to modify the attapulgite under the different conditions. Four organic pollutants that are LAS,chromaticity.phenol and ammonia nitrogen in water were disposed by the modified attapulgite and the best modified condition was confirmed. Compared the three methods of modified attapulgite, the results shown that when disposing the LAS, the sodium chloride was the best way with the concentration of 2.5 mol/L, the removeal rate was 73% when disposing the phenol and the ammonia nitrogen, the hydrochloric acid was the best way with the concentration of 2 mol/L and the removal rate was 87 % for phenol and 92 % for ammonia nitrogen. The removal of chromaticity was best as 95 % when calcine temperature for phenol was 500℃.