论文总字数：20343字

摘 要

如何处理高浓度氨氮废水的问题已经受到了越来越多的关注，本文利用超声强化人造沸石的吸附法进行处理高浓度氨氮有机废水。采用吸附法进行废水处理，普通材料已经无法满足现状。从各种材料中选取沸石分子筛作为吸附剂，进行研究。本文通过两个方法提高吸附效果，一个是对沸石的改性，提高沸石的吸附能力，另一个通过超声的辅助增强手段。在吸附实验阶段，考虑各个影响因素对于人造沸石的吸附效果的影响。最后加入超声条件，重复实验。在改性沸石实验阶段中，利用NaCl浸泡法对人造沸石改性处理，并确定NaCl最佳浓度，然后考察各个影响因素对改性沸石的影响。同样加上超声条件考察实验影响，最后正交实验确定最佳工艺：浓度为0.8 mol/L的 NaCl溶液对人造沸石改性效果最佳；当改性沸石投加量50 g/L、吸附时间40 min、常温25 ℃、pH呈中性，氨氮去除效果最好。加上超声作用后，溶液中氨氮去除效果更显著，最佳超声功率240 W。

关键词： 人造沸石 　NaCl改性　 超声　 氨氮 　吸附

Ultrasonic reinforced synthetic zeolite research of high concentration of ammonia nitrogen organic wastewater treatment

ABSTRACT

It has been paid more and more attention how to deal with the problem of high concentration of ammonia nitrogen wastewater. In this paper, high concentration of ammonia nitrogen organic wastewater is treated by ultrasonic adsorption of artificial zeolite. Using the adsorption method for wastewater treatment, ordinary materials have been unable to meet the status quo. The zeolite molecular sieve was selected as an adsorbent from various materials. In this paper, two methods to improve the adsorption effect, one is the zeolite modification, improve the adsorption capacity of zeolite, and the other through the auxiliary means of ultrasound to enhance. In the adsorption experiment stage, the influence of various factors on the adsorption effect of artificial zeolite was considered. Finally add the ultrasound conditions, repeat the experiment. In the experimental stage of modified zeolite, the artificial zeolite was modified by NaCl immersion method, and the optimum concentration of NaCl was determined. Then, the influence of various factors on the modified zeolite was investigated. The optimum conditions were determined by orthogonal experiment. The optimum conditions were as follows: NaCl solution with the concentration of 0.8 mol / L had the best effect on the modification of the artificial zeolite. When the modified zeolite dosage was 50 g / L, the adsorption time 40 min, room temperature 25 ℃, pH was neutral, ammonia nitrogen removal effect is best. With the addition of ultrasound, the solution of ammonia nitrogen removal effect is more significant, the best ultrasonic power 240 W.

Key Words：Artificial zeolite；NaCl modification；Ultraphonic；Ammonia nitrogen；Adsorption

目 录

摘 要 I

ABSTRACT II

目 录 III

第一章 综述 1

1.1课题研究背景 1

1.1.1水资源现状 1

1.1.2水体富营养化来源及危害 1

1.2高浓度氨氮废水的现状及危害 1

1.2.1 氨氮废水的主要来源及其特性 1

1.2.2氨氮废水的危害 2

1.3氨氮废水去除方法 2

1.3.1生物法 2

1.3.2物理化学法 3

1.3.3沸石分子筛 5

1.4本课题研究内容 6

第二章 实验方案 7

2.1实验仪器和试剂 7

2.1.1主要原料与试剂 7

2.1.2主要实验仪器 8

2.2 实验装置 8

2.3 模拟氨氮废水的制备 9

2.4 改性沸石的制备 9

2.5 氨氮的测定方法 9

2.5.1方法原理 9

2.5.2测定步骤 9

2.6人造沸石氨氮吸附研究 11

2.6.1人造沸石表征 11

2.6.2影响人造沸石吸附的因素研究 11

2.7改性沸石氨氮吸附研究 12

第三章 改性沸石吸附氨氮的实验研究 12

3.1人造沸石的改性 13

3.1.1最佳NaCl改性浓度的确定 13

3.2人造沸石改性前后表征分析对比 13

3.2.1 SEM和BET表征分析 14

3.2.2 XRD表征分析 15

3.3改性沸石的单因素实验研究 16

3.3.1吸附时间对氨氮去除率的影响 16

3.3.2超声功率对氨氮去除效果的影响 17

3.3.3沸石投加量对氨氮去除效果的影响 18

3.3.4温度对氨氮去除率的影响 18

3.3.5 pH对氨氮去除率的影响 19

3.4改性沸石正交实验 20

3.5改性沸石吸附的热力学分析 21

第四章 结论与展望 23

4.1结论 23

4.2展望 23

参考文献 24

致谢 27

第一章 综述

1.1课题研究背景

请支付后下载全文，论文总字数：20343字