【作者】 杨敏；

【导师】 宁平； 杨陆华；

【作者基本信息】 昆明理工大学 ， 环境工程， 2006， 硕士

【摘要】 某些工业废水和生活污水中的氮和磷，是引起水体富营养化的主要根源之一。如何减少氮和磷的排放量，已经成为保护水体的重要课题。本文主要研究了改性膨润土对模拟废水和实际废水中的氮和磷的去除，初步分析了其作用机理，探讨了其实际应用的可行性。膨润土在我国储量丰富，它是一种含水硅铝酸盐粘土矿物。由于具有一些十分特殊的物化性能，近年来被人们应用在废水处理中。天然膨润土几乎没有去除废水中氮、磷的作用，但经过改性后的膨润土对模拟废水中的氮、磷有较好的去除效果。本论文以云南文山的膨润土为原料，对其进行了提纯、钠化等预处理，制备了稀土镧改性膨润土、稀土铈改性膨润土和铝、铁交联膨润土吸附剂，并用XRD等方法进行了表征。研究了经过以上三种方法改性的膨润土吸附剂对废水中的磷及氮的吸附性能，实验研究了投加量、时间、pH值、温度对氮、磷去除的影响。实验结果证明：未经改性的膨润土对磷、氮的吸附很小，而经过稀土镧改性的膨润土、稀土铈改性的膨润土和铝、铁交联膨润土对磷、氮有较好的吸附效果，且受时间、pH值等的影响。改性膨润土用于含氮、磷废水的处理，是一种经济而有效的处理方法，对膨润土资源的利用具有较好的实际意义。更多还原

【Abstract】 Nitride and phosphate in some industrial wastewater and municipal wastewater is the main reason of entrophication of reserviors. How to lower the nitride and phosphate has been the important task of protecting the water. The paper mainly studied the removal of nitride and phosphate in model wastewater and municipal wastewater with modified bentonites, and analyzed the mechanism of removal of nitride and phosphate and disc -ussed the feasibility of actual application.Bentonite is one kind of mineral clays containing the aqueous aluminosilicate and there is abundance storage in our country. As it shows some special physical and chemical pro -perties, it is used in wastewater treatment. Natural bentonite did not lower the nitride and phosphate concentrations. But modified bentonites is effective to removal nitride and phosphate. In this paper, wenshan bentonite in Yunnan, as raw material, was modified by some kinds of ways such as purification sodium chloride treating. Finally La-loaded bentonite , Ce-loaded bentonite and Al,Fe cross-linked bentonite are prepared. Absorption of modified bentonite was characterized by XRD etc.measurement.The paper studied the removal of nitride and phosphate in model wastewater and municipal wastewater with modified bentonites, the effects of the amount of modified bentonite, time, pH and temperature on nitride and phosphate removal from model wastewater. The results show that natural bentonite did not lower the nitride and phosphate concentrations. But modified bentonite is effective to removal nitride and phosphate. Absorption of modified bentonite was effected by time, pH etc.It is a kind of economical and effective treatment method to use modified bentonite in treating wastewater with nitride and phosphate. It has a good applicable sense to use of our country’ s bentonite resource.更多还原