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Ferric chloride-chitosan composite coagulant and preparation method thereof

A technology of ferric chloride and chitosan, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, textile industry wastewater treatment, etc. Self-purification and other problems, to achieve good total phosphorus removal effect, short cycle and low cost.

Inactive Publication Date: 2018-06-22
常州华禹环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dyes in wastewater can absorb light, reduce the transparency of water, affect the growth of aquatic organisms and microorganisms, not conducive to self-purification of water, and easily cause visual pollution

Method used

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  • Ferric chloride-chitosan composite coagulant and preparation method thereof
  • Ferric chloride-chitosan composite coagulant and preparation method thereof
  • Ferric chloride-chitosan composite coagulant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A preparation method of ferric chloride-chitosan compound coagulant has the following steps:

[0021] (1), take by weighing 1.6g ferric chloride solid and dissolve in 15ml distilled water, stir to make it mix evenly, form orange-yellow transparent solution;

[0022] (2), get chitosan and distilled water and mix by weight ratio 1:900, stir evenly, obtain the chitosan solution that mass concentration is 1.1g / L;

[0023] (3), get the chitosan solution that 35ml step (2) makes and join in the yellow transparent solution that step (1) makes, the weight ratio of chitosan solution and yellow transparent solution is 1:25, makes the first A mixed solution; add 0.3 g of initiator during the heating and stirring process of the first mixed solution, the stirring speed is 200 r / min, the heating temperature is 75 ° C, and stirred for 2 hours to obtain the second mixed solution;

[0024] (4), add 2mol / L lye in the second mixed solution that step (3) prepares, adjust the pH of the sec...

Embodiment 2

[0026] A preparation method of ferric chloride-chitosan compound coagulant has the following steps:

[0027] (1), take by weighing 1.665g ferric chloride solid and be dissolved in 30ml distilled water, stir to make it mix uniformly, form orange-yellow transparent solution;

[0028] (2), get chitosan and distilled water and mix by weight 1:1000, stir evenly, obtain the chitosan solution that mass concentration is 1.0g / L;

[0029] (3), get the chitosan solution that 25ml step (2) makes and join in the yellow transparent solution that step (1) makes, the weight ratio of chitosan solution and yellow transparent solution is 1:50, makes the first A mixed solution; add 0.45 g of initiator during the heating and stirring process of the first mixed solution, the stirring speed is 200 r / min, the heating temperature is 85 ° C, and stirred for 1.5 h to obtain the second mixed solution;

[0030] (4), add 1mol / L lye in the second mixed solution that step (3) makes, regulate the pH of the s...

Embodiment 3

[0032] A preparation method of ferric chloride-chitosan compound coagulant has the following steps:

[0033] (1), take by weighing 1.665g ferric chloride solid and be dissolved in 37ml distilled water, stir to make it mix uniformly, form orange-yellow transparent solution;

[0034] (2), get chitosan and distilled water and mix by weight 1:1000, stir evenly, obtain the chitosan solution that mass concentration is 1.0g / L;

[0035] (3), get the chitosan solution that 13ml step (2) makes and join in the yellow transparent solution that step (1) makes, the weight ratio of chitosan solution and yellow transparent solution is 1:75, makes the first A mixed solution; add 0.3 g of initiator during the heating and stirring process of the first mixed solution, the stirring speed is 200 r / min, the heating temperature is 80 ° C, and stirred for 2 hours to obtain the second mixed solution;

[0036] (4), add 1mol / L lye in the second mixed solution that step (3) prepares, adjust the pH of the...

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Abstract

The invention discloses a ferric chloride-chitosan composite coagulant and a preparation method thereof. The preparation method of the compound coagulant comprises the following steps: dissolving ferric chloride in the distilled water; adding chitosan according to a mass ratio of the element Fe to the chitosan being (25 to 100) to 1; adding an initiator while heating and stirring so that the FeCl3solution and the chitosan are completely and mutually dissolved; after 1-2 hours of reacting, adjusting the pH to 1.9-2.5 by using alkali liquor, to obtain an orange and transparent ferric chloride-chitosan compound coagulant. The preparation method thereof disclosed by the invention has the advantages of simple process, short preparation cycle, low cost, rare dispersion and low dosage. The ferric chloride-chitosan composite coagulant prepared by the method can be applied to the coagulation treatment process for the printing and dyeing and textile wastewater.

Description

technical field [0001] The invention relates to the technical field of compound flocculants for water treatment, in particular to a ferric chloride-chitosan compound coagulant and a preparation method thereof. Background technique [0002] The main factor causing the high chroma of printing and dyeing wastewater is the dyestuff. It is estimated that the world's annual production of textile dyes is more than 400,000 tons, and about 10% to 20% of the dyes are discharged as wastewater during the printing and dyeing process and enter rivers, lakes, seas and ground water. The dyes in wastewater can absorb light, reduce the transparency of water, affect the growth of aquatic organisms and microorganisms, not conducive to self-purification of water, and easily cause visual pollution. Seriously polluted water bodies can even affect human health. [0003] Flocculation is one of the most commonly used key processes in wastewater treatment. The advantages of flocculation are mainly i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/56C02F103/30
CPCC02F1/5236C02F1/5263C02F1/56C02F2103/30
Inventor 夏雄侯青桐许霞
Owner 常州华禹环保科技有限公司