Method for adding buffered solution into polysilicate flocculating agent for prolonging stabilization time

A technology of polysilicate and buffer solution, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of pH value, dilution ratio, storage temperature stability, etc., achieve good application prospects, maintain flocculation performance, raw materials Inexpensive and easy to get effects

Inactive Publication Date: 2014-01-08
XINJIANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, pH value, dilution ratio, storage temperature...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 10 mL of 6mol / L sulfuric acid in a 150mL beaker. Dissolve 11.7 g of sodium silicate solid with 25 mL of water to obtain a sodium silicate solution, which is added to sulfuric acid for an activation time of 45 min to obtain a polysilicic acid solution. According to the ratio of zinc to silicon of 1:1, 11.6 g of zinc sulfate was dissolved in 25 mL of water, added to the polysilicic acid solution, and stirred to obtain a polyzinc silicate flocculant with a pH of 2.0. The gel time is 51 hours.

Embodiment 2

[0023] Add 10 mL of 6mol / L sulfuric acid in a 150mL beaker. Dissolve 11.7 g of sodium silicate solid with 25 mL of water to obtain a sodium silicate solution, add it to sulfuric acid, and stir and activate for 45 minutes to obtain a polysilicic acid solution. According to the ratio of zinc to silicon of 1:1, 11.6 g of zinc sulfate was dissolved in 25 mL of water, added to the polysilicic acid solution, and stirred to obtain a polyzinc silicate flocculant with a pH of 2.0. Add 30ml of 0.5mol / L aminoacetic acid-hydrochloric acid buffer solution. The gel time is 66 hours.

Embodiment 3

[0025] Add 10 mL of 6mol / L sulfuric acid in a 150mL beaker. Dissolve 11.7 g of sodium silicate solid with 25 mL of water to obtain a sodium silicate solution, add it to sulfuric acid, stir and activate for 70 min to obtain a polysilicic acid solution. According to the ratio of zinc to silicon of 1:1, 11.6 g of zinc sulfate was dissolved in 25 mL of water, added to the polysilicic acid solution, and stirred to obtain a polyzinc silicate flocculant with a pH of 2.0. Add 180ml of 0.5mol / L aminoacetic acid-hydrochloric acid buffer solution. The gel time is 204 hours.

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PUM

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Abstract

The invention discloses a method for adding a buffered solution into a polysilicate flocculating agent for prolonging stabilization time. Due to the fact that the polysilicate flocculating agent has excellent flocculating performance and also has better charge neutrality, aggregation and bridging functions, the polysilicate flocculating agent turns into a novel inorganic polymer flocculating agent. Due to the instability of polysilicic acid, the stability of the polysilicate flocculating agent is poor. According to the method, the buffered solution or corresponding solid is added into the polysilicate flocculating agent, the acidity stabilizing characteristic of the buffered solution is adopted, fluctuation of the pH value of the polysilicate flocculating agent in the storing process can be prevented, and formation of high aggressiveness precursors is reduced.

Description

Technical field [0001] The invention belongs to the field of inorganic polymer flocculants, and proposes a method for adding a buffer solution to a polysilicate flocculant to extend the stability time. Background technique [0002] At present, water treatment technology methods mainly include biochemical methods, ion exchange methods, chemical oxidation methods, flocculation methods, etc. The most widely used and lowest cost method is flocculation, which is the most effective method for treating surface water and industrial wastewater. Flocculants are widely used in chemical industry, environmental protection, water treatment and other fields. The types of flocculants are mainly divided into four categories: inorganic flocculants, organic flocculants, microbial flocculants, and composite flocculants. Inorganic flocculants have the advantages of easily available raw materials, simple process, low toxicity, low price, and low operating cost. They occupy an important position in th...

Claims

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Application Information

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IPC IPC(8): C02F1/52
Inventor 王雪枫李文秀黄雪莉赵建茹
Owner XINJIANG UNIVERSITY
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