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Preparation method of modified kaoline alga flocculating agent and application thereof

A kaolin and flocculant technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of cumbersome cost and pollution, and achieve the effect of low cost, efficient flocculation, and simple preparation method

Active Publication Date: 2011-11-23
CHINA THREE GORGES UNIV
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Problems solved by technology

[0004] In clay minerals, there are many studies on the use of kaolin for modified flocculation and algae removal, such as the use of surfactants, polyferric chloride, polyaluminum chloride, chitosan, sodium citrate-sodium bicarbonate-sodium hydrosulfate, etc. The treatment of these modifiers more or less increases the flocculation ability of kaolin, but some will cause secondary pollution, cumbersome or high cost and other problems

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  • Preparation method of modified kaoline alga flocculating agent and application thereof
  • Preparation method of modified kaoline alga flocculating agent and application thereof
  • Preparation method of modified kaoline alga flocculating agent and application thereof

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preparation example Construction

[0021] Preparation of flocculant:

[0022] A preparation method of modified kaolin algae flocculant, comprising the following steps:

[0023] (1) Raw material preparation: Modifiers are chitosan and hydroxyaluminum chloride, in weight ratio: chitosan: hydroxyaluminum chloride = 1:1~1:6 mixed chitosan and hydroxyaluminum chloride Aluminum-based chloride is the modifier; by weight ratio: modifier: kaolin = 1:4;

[0024] (2) Raw material treatment: kaolin treatment: boil the sieved kaolin solution, let it stand, separate the upper suspension, wash and precipitate for many times; place the upper suspension for precipitation, discard the supernatant, and dry the precipitation;

[0025] Chitosan treatment: add HCl solution to chitosan to dissolve chitosan;

[0026] Aluminum hydroxychloride treatment: Add aluminum hydroxychloride to distilled water and stir to dissolve, set aside;

[0027] (3) Preparation of the modified kaolin algae flocculant: mix the modifier and the treated ka...

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Abstract

The invention discloses a preparation method of a modified kaoline alga flocculating agent and application thereof. The alga flocculating agent is prepared by mixing a mixture of chitosan and aluminum hydroxychloride serving as a modifier with kaoline. The preparation method of the kaoline alga flocculating agent provided by the invention has the advantages of easiness for operation, low cost and no secondary pollution because the modifier and a substrate are environment-friendly materials; and simultaneously, the flocculating agent has a high-efficiency flocculation action and a good alga removing effect.

Description

technical field [0001] The invention relates to a preparation method of a modified kaolin high-efficiency algae flocculant; the invention also relates to the application of the flocculant in controlling algal blooms. Background technique [0002] In recent years, the eutrophication of water bodies has led to the frequent occurrence of harmful algal blooms and the resulting algal toxin pollution, which has resulted in the deterioration of water quality and has caused an ecological disaster. So far, there is no safe, effective, reasonable and economical solution to deal with such natural disasters. The methods and techniques that have been studied can be grouped into several categories: [0003] Simple physical method, biological restraint method, chemical killing method, air flotation collection method, and flocculation sedimentation method. However, these methods have more or less limitations and problems such as secondary pollution to the environment. Clay-based mineral ...

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Application Information

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IPC IPC(8): C02F1/52
Inventor 黄应平张钰刘世涛方艳芬蒋悦
Owner CHINA THREE GORGES UNIV
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