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Compound flocculant with polymerization ferric chloride and amination polymers based on papermaking sludge and method for preparing compound flocculant

A technology of polyferric chloride and composite flocculant, applied in chemical instruments and methods, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. The problems of narrow range and high operating cost can achieve good coagulation effect, reduce slow stirring and sedimentation time, and high coagulation efficiency.

Active Publication Date: 2016-05-11
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This product has high requirements on synthesis temperature, and only under the condition of high dosage, it has a certain coagulation effect on heavily polluted water samples, and the removal effect on low molecular organic matter in water is not obvious, so this product has coagulation efficiency Disadvantages such as low, high operating costs, and narrow range of application water bodies
[0005] After searching, there are no relevant literature reports on the preparation of aminated organic flocculants from papermaking sludge and the preparation of composite flocculants with iron-based coagulants.

Method used

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  • Compound flocculant with polymerization ferric chloride and amination polymers based on papermaking sludge and method for preparing compound flocculant
  • Compound flocculant with polymerization ferric chloride and amination polymers based on papermaking sludge and method for preparing compound flocculant
  • Compound flocculant with polymerization ferric chloride and amination polymers based on papermaking sludge and method for preparing compound flocculant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Embodiment 1. The preparation of the composite flocculant (PFC-LNF) of different alkalization degrees

[0052] (1) Weigh 24.1g of FeCl 3 ·6H 2 0 solid and dissolved in deionized water, adding Na dropwise 2 CO 3 solution, control OH - : Fe 3+ The molar ratio is 0.25, 0.5, 1.0, 1.5, until it is completely dissolved under the action of magnetic stirring. After the foam disappears, add 1.27g of Na stabilizer according to the ratio of phosphorus to iron molar ratio of 0.08 2 HPO 4 12H20 powder, continue to stir until it is completely dissolved, and finally dilute to 500ml with distilled water to obtain a polyferric chloride solution with a mass concentration of Fe of 10g / L;

[0053] (2) Add 2.0 g of papermaking sludge into 50 ml of deionized water, add dropwise 1 mol / L NaOH solution under stirring, control the pH to 11.5, stir at a speed of 200 rpm for 20 min, and centrifuge the obtained mixture for 10 min at a speed of 10000 rpm, take Pour the supernatant into the re...

Embodiment 2

[0055] Embodiment 2. The preparation of the composite flocculant (PFC-LNF) of different ethylenediamine addition amount

[0056] Same as described in Example 1, the difference is that the addition of anhydrous sodium carbonate is 2.4g, and the addition of step (2) ethylenediamine is respectively 2ml, 3ml, 4ml, 5ml, to obtain different additions of ethylenediamine Quantity of composite flocculant products.

Embodiment 3

[0057] Embodiment 3. The preparation of the composite flocculant (PFC-LNF) of different triethylamine addition amount

[0058] The same as described in Example 2, the difference is that the addition of ethylenediamine is 4ml, and the addition of triethylamine in step (2) is 7ml, 8ml, 9ml, 10ml respectively, to obtain the composite of different triethylamine additions. flocculant products.

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Abstract

The invention relates to a compound flocculant with polymerization ferric chloride and amination polymers based on papermaking sludge and a method for preparing the compound flocculant. The method includes synthesizing amination polymers from the papermaking sludge generated in the papermaking industry; compounding the amination polymers and the inorganic flocculant polymerization ferric chloride to prepare the compound flocculant with the polymerization ferric chloride and the amination polymers based on the papermaking sludge. The compound flocculant and the method have the advantages that the color removal rate of disperse yellow water samples can reach 95% at least when the compound flocculant is used for treating the simulated dye water samples and the dosing quantity of the compound flocculant is 5 mg / L, excellent flocculation effects can be realized by the compound flocculant for water samples under different acidity and alkalinity conditions and other diversified water samples, the capital construction cost of reaction tanks and sedimentation tanks can be reduced, and the compound flocculant is high in electricity performance and flocculation efficiency, good in dissolving property, long in storage cycle and applicable to the field of water supply, wastewater treatment and the like and suitable for actual application to water treatment.

Description

technical field [0001] The invention relates to a polyferric chloride-papermaking sludge-based aminated polymer composite flocculant and a preparation method thereof, belonging to the technical field of waste resource utilization and water treatment flocculants. Background technique [0002] Coagulation sedimentation method is a commonly used water treatment and water purification technology at home and abroad. It is an economical and simple water quality treatment method that is generally used to improve treatment efficiency. The innovative development of water treatment technology, the reduction of operating costs and the improvement of water purification quality depend to a large extent on the performance of coagulants. Common coagulants mainly include aluminum salts and iron salts, but aluminum-based coagulants have been proved to have residual aluminum neurotoxicity problems in use, while iron salts have low toxicity and can improve biological treatment of activated slu...

Claims

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Application Information

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IPC IPC(8): C02F1/56C02F1/52C08G65/26
CPCC02F1/5236C02F1/56C08G65/2624
Inventor 高宝玉李瑞华岳钦艳王燕李倩许醒
Owner SHANDONG UNIV
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