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Polyaluminum ferric chloride-paper mill sludge based polymer composite flocculant and preparation method thereof

A technology of polyaluminum ferric chloride and composite flocculants, which is applied in chemical instruments and methods, sludge treatment, water/sludge/sewage treatment, etc., can solve the problem of ineffective removal of low-molecular organic matter and limit large-scale industrial production , high synthetic temperature requirements, etc., to achieve good coagulation effect, reduce infrastructure costs and operating costs, and have a long storage period

Active Publication Date: 2016-03-09
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flocculant has high requirements on the synthesis temperature, which limits its large-scale industrial production, 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 disadvantages such as low coagulation efficiency, high operating cost, and narrow application range of water bodies.
[0006] After searching, there are no relevant literature reports on the preparation of cationic flocculants from papermaking sludge and the preparation of composite flocculants with inorganic coagulants.

Method used

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  • Polyaluminum ferric chloride-paper mill sludge based polymer composite flocculant and preparation method thereof
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  • Polyaluminum ferric chloride-paper mill sludge based polymer composite flocculant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment 1. The preparation of the composite flocculant (PFACl-LBF) of different aluminum-iron mass ratios

[0055] (1) Weigh three groups of A1C1 with different mass ratios of aluminum and iron 3 ·6H 2 0 and FeC1 3 ·6H 2 0 solid and dissolved in deionized water, respectively the first group, A1C1 3 ·6H 2 0: 9.9g, FeC1 3 ·6H 2 0: 6.7g; second group, A1C1 3 ·6H 2 0: 11.2g, FeC1 3 ·6H 2 0: 6.0g; the third group, A1C1 3 ·6H 2 0: 12.4g, FeC1 3 ·6H 2 0: 5.3g. Add Na dropwise 2 CO 3 Solution, control alkalinity OH - :(Fe 3+ +Al 3+ ) in a mol ratio of 1.0, until completely dissolved under the effect of a magnetic stirrer. After the foam disappears, add 0.60 g of Na 2 HPO 4 12H 2 0 powder, continue stirring until completely dissolved. Finally dilute and settle to 250ml with distilled water, the mass concentration that makes (Fe+Al) is the polyaluminium ferric chloride solution of 10g / L;

[0056] (2) Weigh 2.0 g of papermaking sludge and dissolve it in...

Embodiment 2

[0060] Embodiment 2. Preparation of the composite flocculant (PFACl-LBF) of different degrees of alkalization

[0061] Same as described in Example 1, the difference is A1C1 3 ·6H 2 0 dosage is 11.2g, FeC1 3 ·6H 2 The dosage of 0 is 6.0g, and the dosage of anhydrous sodium carbonate in step (1) is 7.3g, 14.6g, and 21.9g respectively, so that composite flocculant products with different degrees of alkalization can be obtained.

Embodiment 3

[0062] Embodiment 3. The preparation of the composite flocculant (PFACl-LBF) of different acrylamide addition amount

[0063] Same as described in Example 2, the difference is that the addition of anhydrous sodium carbonate is fixed at 14.6g, and the addition of acrylamide in step (2) is respectively 1.0g, 2.0g, 3.0g, 4.0g, to obtain final product Composite flocculant products with different amounts of acrylamide added.

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Abstract

The invention relates to polyaluminum ferric chloride-paper mill sludge based polymer composite flocculant and a preparation method thereof. The preparation method includes the steps that a paper mill sludge raw material is directly subjected to dissolution and crude extraction through alkali liquor so that lignin can be obtained, a cation-type paper mill sludge based polymer is prepared through graft modification to be reacted with polyaluminum ferric chloride in a mixed mode, and accordingly the novel efficient composite flocculant is prepared. When the obtained flocculant is used for treating a simulated dye water sample and the dosing quantity is 5 mg / L, the chroma removing rate of disperse yellow water samples is stabilized to be above 95%, and meanwhile a good coagulation effect is achieved on both the water samples under the different acidity-alkalinity conditions and other various water samples. The process is simple, the number of needed devices is small, industrialized production and application can be facilitated, and waste recycling is achieved; moreover, the prepared flocculant is high in flocculation efficiency and wide in application range, and a good treatment effect can be achieved on common water body pollutants.

Description

technical field [0001] The invention relates to a polyaluminum ferric chloride-papermaking sludge-based 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 an economical and simple water quality treatment method commonly used to improve treatment efficiency in the field of water industry, water pollution control, seawater desalination and water-saving reuse purification engineering technology at home and abroad. The innovative development of water treatment technology, the simplification of process flow, the reduction of operating costs and the improvement of water purification quality largely depend on the performance of coagulants. The most widely used coagulants are hydrolyzable metal salts, such as aluminum salts and iron salts, but aluminum-based coagulants have the problem of residual aluminum neuro...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F1/56C02F11/00C02F103/28
CPCC02F1/5245C02F1/56C02F11/00C02F2103/28
Inventor 高宝玉李瑞华卜凡孙阳阳岳钦艳王燕
Owner SHANDONG UNIV
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