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Environment-friendly magnesium-ion modified montmorillonite tap water flocculant and application thereof

A technology of montmorillonite and magnesium ions, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of secondary pollution of water bodies, and achieve the effects of fast sedimentation, low drug cost, and favorable flocculation and sedimentation

Inactive Publication Date: 2014-06-25
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the most commonly used flocculant for tap water treatment in my country is polyaluminum trichloride (CF-PAC), because it will inevitably introduce aluminum ions in the process of tap water treatment, which will bring secondary pollution to the water body.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] An environment-friendly magnesium ion modified montmorillonite tap water flocculant, which is prepared from chitosan solution and magnesium ion modified montmorillonite solution; the chitosan solution, magnesium ion modified montmorillonite solution The volume ratio is 0.8:1;

[0024] The preparation method of the chitosan solution is as follows: first take by weighing 99.6 g of acetic acid with a mass concentration of 2%, add it to the reactor, and then add 0.4 g of chitosan under constant stirring, and stir at 16° C. for 1.5 hours , be made into the acetic acid solution of chitosan mass content 0.4%; Described magnesium ion modified montmorillonite solution is to be 1:1:1 by mass ratio by sodium hydroxide, sodium bicarbonate, magnesium chloride, montmorillonite and water : The ratio of 5:92 is prepared after mixing evenly.

[0025] Application: Take 200mL of raw water from the Changjiang River in Wuhan City, Hubei Province, and its turbidity is measured to be 70NTU. ...

Embodiment 2

[0027] An environment-friendly magnesium ion modified montmorillonite tap water flocculant, which is prepared from chitosan solution and magnesium ion modified montmorillonite solution; the chitosan solution, magnesium ion modified montmorillonite solution The volume ratio is 1.2:1.2;

[0028] The preparation method of the chitosan solution is as follows: first take by weighing 99.2 g of acetic acid with a mass concentration of 3%, add it to the reactor, and then add 0.8 g of chitosan under constant stirring, and stir for 2.0 hours at 20° C. , be made into the acetic acid solution of chitosan mass content 0.8%; Described magnesium ion modified montmorillonite solution is to be 1:1:2 by mass ratio by sodium hydroxide, sodium bicarbonate, magnesium chloride, montmorillonite and water : The ratio of 6:90 is prepared after mixing evenly.

[0029] Application: Take 200mL of raw water from the Yangtze River in Wuhan City, Hubei Province. The measured turbidity is 80NTU. Add 2.4mL o...

Embodiment 3

[0031] An environment-friendly magnesium ion modified montmorillonite tap water flocculant, which is prepared from chitosan solution and magnesium ion modified montmorillonite solution; the chitosan solution, magnesium ion modified montmorillonite solution The volume ratio is 1.6:1.4;

[0032] The preparation method of described chitosan solution is as follows: first take by weighing acetic acid 98.8g that mass concentration is 4%, add reactor, under the situation of constantly stirring, add 1.2g chitosan, stir 2.5 hours at 24 ℃, Be made into the acetic acid solution of chitosan mass content 1.2%; Described magnesium ion modified montmorillonite solution is to be 1:1:3 by mass ratio by sodium hydroxide, sodium bicarbonate, magnesium chloride, montmorillonite and water: The ratio of 7:88 is prepared after mixing evenly.

[0033] Application: Take 200mL of raw water from the Changjiang River in Wuhan City, Hubei Province, and its turbidity is measured to be 90NTU. Add 3.0mL of ...

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Abstract

The invention discloses an environment-friendly magnesium-ion modified montmorillonite tap water flocculant. The flocculant is prepared by a chitosan liquid and a magnesium-ion modified montmorillonite liquid; the chitosan liquid is an acetic acid liquid containing 0.2-2 mass percent of chitosan, and the magnesium-ion modified montmorillonite liquid is prepared by the mixing of sodium hydroxide, sodium bicarbonate, magnesium chloride, montmorillonite and water according to the mass ratio of 1:1:(1-4):(5-8):(86-92). The flocculant of the invention has large flocculation particles and fast sedimentation rate, the removal rate of raw water turbidity reaches 98.09 percent, and for the raw water with the turbidity of 70-100 NTU, the once treatment can be within 3 NTU of the national standards; and the cost is low, and the flocculant has no ingredients harmful to human bodies, and has excellent performance and stable quality.

Description

technical field [0001] The invention belongs to the field of tap water treatment, and relates to an environment-friendly magnesium ion modified montmorillonite flocculant and an application thereof. Background technique [0002] At present, the most commonly used flocculant for tap water treatment in my country is polyaluminum trichloride (CF-PAC), because it will inevitably introduce aluminum ions in the process of tap water treatment, which will bring secondary pollution to the water body. After the residual aluminum in tap water enters the human body, part of it is excreted with feces, and the rest is enriched in blood, muscle, bone and other tissues and organs. When the concentration of aluminum in the body exceeds a certain value, it will cause biological lesion. Long-term intake of aluminum ions can lead to various diseases such as cerebral dementia and osteoporosis, and endanger human health. [0003] Therefore, in order to overcome some shortcomings of traditional ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 曾德芳李壮王飞宇
Owner WUHAN UNIV OF TECH
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