改性膨润土处理污水中有机污染物的研究

Study on Treating Organic Pollutants in Municipal Sewage by Modified Bentonite

探讨了有机膨润土再生及再生膨润土有机化,采用正交试验得出再生有机膨润土吸附水中有机污染物的适宜条件,进行了再生前后有机膨润土对有机污染物吸附效果的比较。结果表明,在780℃、灼烧55min是再生膨润土的最佳再生条件,适宜有机化条件是浆液浓度30%,改性剂7mmol/100g,反应温度60℃,反应时间80min;再生有机膨润土吸附有机污染物最佳吸附条件为pH=6,加土量6g/L,温度25℃,振荡时间20min,COD去除率可达到80%。

The paper describes the regeneration of organic bentonite and the organization of the regenerated bentonite. The best conditions for the adsorption of the organic pollutants from water by regenerated bentonite are studied by orthogonal test and the adsorption effect for organic pollutants by the organic bentonite before and after regeneration is compared. The results show that the optimal conditions for the regeneration of bentonite include combustion at 780℃ for 55min;the best organization condition include a pulp concentration of 30%, modifier dosage of 7ml/100g, reaction temperature of 60℃ and reaction time of 80min ; and the optimal conditions for the adsorption of organic pollutants by regenerated organic bentonite include pH = 6, dosage of bentonite of 6 g/l, temperature of 25℃, and oscillation time of 20 min, when the COD removal rate can reach 80%.