论文总字数：16491字

摘 要

伴随着化学试剂的发展，种类繁多的染料被用于印染工艺，自然水体又难以降解这些含有芳烃和杂环的化合物，对人体健康产生了极大的危害。这其中，中性红是一种含有杂环吩嗪的盐酸盐染料，被广泛应用于纺织和印染等工业，在染料废水中具有一定的代表性。因此，去除印染废水中的中性染料，研究新型处理剂具有重要意义。

本文首先合成含硼聚硅酸铝镁混凝剂，通过单因素法研究合成条件对混凝性能的影响，找到较好的合成条件；然后用合成混凝剂对模拟中性红废水进行混凝预处理，研究混凝工艺对混凝效果的影响。中性红去除率用分光光度法测定。由实验结果得出较佳的合成条件为：在B/Si=0.15，（Al Mg）/Si=0.5，Al/Mg=1时达到较为理想的混凝效果；在探究混凝工艺对混凝效果时的最佳废水初始pH=6，含硼聚硅酸盐铝镁混凝剂投加量为50mL/L，搅拌时间为15min。在以上条件下处理中性红废水，去除率可达73.5%，去除效果较理想。

关键词：中性红废水 聚硅酸金属盐 絮凝法

Synthesis of boron-containing polysilicate aluminum-magnesium coagulant and its coagulation in simulated neutral wastewater

Abstract

With the rapid development of the chemical dye industry, more and more dyes, which are based on aromatic hydrocarbons and heterocyclic compounds and have color groups and polar groups, are discharged into the water body, which increases the burden of the self-purification ability of the water body and endangers human health. Among them, neutral red is a hydrochloride dye containing heterocyclic phenazine, which is widely used in textile and printing and dyeing industries, and has representativeness in dye wastewater. Therefore, it is of great significance to remove neutral dyes in printing and dyeing wastewater and study new treatment agents.

In this paper, boron-containing polymagnesium aluminum silicate coagulant was synthesized firstly，the effect of synthesis conditions on coagulation performance was studied，and better synthesis conditions were found. Then coagulation pretreatment on simulated neutral red wastewater was performed by using synthetic coagulants, and influence of treatment process on coagulation performance was investigated. The effect of different synthesis conditions on the coagulation performance of the coagulant was studied by single factor method, and the removal rate of neutral red was determined by spectrophotometry. From the experimental results, the better synthesis conditions are as follows: when B / Si = 0.15, (Al Mg) /Si=0.5, Al / Mg = 1, the ideal coagulation effect is achieved; The optimal pH for coagulation effect is 5, the boron-containing polysilicate aluminum magnesium coagulant dosage is 50mL / L, and the stirring time is 15min. Under the above conditions, the removal rate of neutral red wastewater can reach 73.5%, and the removal effect is ideal.

Keywords: Neutral red wastewater; Polysilicate metal salt; Flocculation;

目 录

摘 要 I

Abstract II

第一章 综述 1

1.1 印染废水简介 1

1.2 印染废水的处理方法及研究进展 1

1.2.1 吸附法 1

1.2.2 膜分离法 2

1.3 高级氧化法研究进展 2

1.3.1电化学氧化法 2

1.3.3电凝聚-电气浮法 3

1.3.4臭氧氧化法 3

1.4 生物法研究进展 3

1.4.1 好氧法 3

1.4.2 厌氧法 4

1.5 絮凝法研究进展 4

1.5.1 传统絮凝法的研究进展 4

1.5.1.1 无机絮凝剂 4

1.5.1.2 有机絮凝剂 5

1.5.1.3复合絮凝剂 5

1.5.2 聚合硅酸金属盐混凝剂的研究进展 6

1.5.2.1 含一元金属的聚硅酸盐 6

1.5.2.2 含二元金属的聚硅酸盐 6

1.5.2.3 聚硅酸金属盐的改性 6

1.6 本文研究的内容和目的 7

第二章 实验部分 8

2.1 试验试剂、仪器和装置 8

2.1.1 实验试剂 8

2.1.2 实验仪器和装置 8

2.1.3 实验准备 8

2.2 标准曲线的建立 9

2.2.1 标准溶液的配置 9

2.2.2 标准曲线的建立 9

2.3 含硼聚硅酸铝镁混凝剂合成实验 10

2.3.1 实验方法 10

2.3.2 B/Si摩尔比对混凝剂混凝效果的影响 10

2.3.3 （Al Mg）/Si摩尔比对混凝剂混凝效果的影响 10

2.3.4 Al/Mg摩尔比对混凝剂混凝效果的影响 10

2.4 混凝工艺对混凝剂混凝效果的研究 11

2.4.1 实验方法 11

2.4.2 pH对废水絮凝效果的影响 11

2.4.3 含硼聚硅酸金属盐混凝剂投加量对废水絮凝效果的影响 11

2.4.4 搅拌时间对废水絮凝效果的影响 11

第三章 结果与讨论 12

3.1 合成条件对混凝剂混凝效果的影响 12

3.1.1 B/Si摩尔比对混凝剂混凝效果的影响 12

3.1.2（Al Mg）/Si摩尔比对混凝剂混凝效果的影响 12

3.1.3 金属Al/Mg摩尔比对混凝剂混凝效果的影响 13

3.2 处理工艺对中性红去除效果的影响 14

3.2.1 废水初始pH对絮凝效果的影响 14

3.2.2 含硼聚硅酸金属盐混凝剂投加量对絮凝效果的影响 15

3.2.3 搅拌时间对絮凝效果的影响 15

第四章 结论与展望 17

参考文献 18

致谢 21

第一章 综述

1.1 印染废水简介

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