【作者】 李艳青；

【导师】 孔海南；

【作者基本信息】 上海交通大学 ， 环境工程， 2007， 硕士

【摘要】 水体富营养化的防治是水环境保护中的一项重要问题,受到国内外的重视,氮磷是水体富营养化的主要控制因素,如何有效去除生活污水中的氮磷,防止水体富营养化的发生,已成为学术界所关心的核心课题。本文目的是利用无机废弃物粉煤灰为原料优化合成沸石,提高粉煤灰沸石的同步脱氮除磷能力,降低合成成本。论文分析了合成过程中温度、反应时间、液固比、NaOH浓度等合成条件对沸石生成、阳离子交换能力(CEC,Cation Exchange Capacity)和磷固定系数(PIC,Phosphate Immobilization Coefficient)的影响,重点研究了不同钙含量的三种粉煤灰优化合成沸石对实际生活污水的氮磷去除能力。本研究讨论的主要内容及结论包括以下三个方面:1、温度主要影响沸石的结晶度;液固比主要影响沸石的种类;NaOH浓度和反应时间对两者均产生影响。合成产物的CEC随温度、液固比经、反应时间呈快速增加,并在分别达到110℃、2.5和16h时趋于最大值。NaOH浓度越高,合成产物CEC也越高,至2mol/L时达到最大,之后显著下降。2、粉煤灰本身氨氮吸附能力极小,但合成沸石以后,CEC显著增加。15种粉煤灰PIC范围为1.92～40.72mg/g,合成沸石则为11.79～47.17mg/g,固磷能力明显提高。污水中氨氮浓度的增加会使粉煤灰合更多还原

【Abstract】 Eutrophication management is of significant importance to aquatic environmental protection and it has received great concern from both home and abroad. How to prevent the occurency of eutrophication by effective removal of Nitrogen (N) and phosphor (P) that are the determinal factors of eutrophication has become the core problem in academic realm. This paper aims at synthesize zeolites with fly ash ,waste inorganic fly ash to reduce cost and enhance the ammonium and phosphate removal efficiency of as-prepared zeolites. The effects of synthesis temperature, reacting of time, ratio of liquid/solid and the concentration of NaOH solution upon the formation of zeolite, cation exchange capacity (CEC) and phosphate Immobilization coefficient (PIC) are systematically investigated. In a further municipal wasterwater analysis, the ammonium and phosphate removal efficiency of three types of zeolites with different calcium contents was intensively studied.The experimental method and result of this study is shown as follows: 1. Crystallization degree of zeolites is mainly influenced by temperature and the category of synthesized zeolites largely depends upon the ratio of更多还原