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PAC (polyaluminium chloride)-modified sodium alginate inorganic-organic composite flocculant and preparation method thereof

A technology of composite flocculant and sodium alginate, which is applied in the field of environmental chemistry, can solve problems such as unsatisfactory effects, and achieve good water treatment effects, good product stability, and good flocculation effects

Active Publication Date: 2015-04-29
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When sodium alginate is used alone, Ca in water 2+ The concentration must be above a certain concentration, so that the good performance of sodium alginate can be effectively exerted, and when the concentration of pollutants in the water body is low, its effect is not ideal
Polyaluminum chloride PAC and sodium alginate are compounded to obtain polyaluminum-modified sodium alginate inorganic-organic composite flocculant. In the domestic and foreign literature databases, there is no relevant literature report.

Method used

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  • PAC (polyaluminium chloride)-modified sodium alginate inorganic-organic composite flocculant and preparation method thereof
  • PAC (polyaluminium chloride)-modified sodium alginate inorganic-organic composite flocculant and preparation method thereof
  • PAC (polyaluminium chloride)-modified sodium alginate inorganic-organic composite flocculant and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] The preparation method of polyaluminum-modified sodium alginate inorganic organic composite flocculant with a composite ratio of PAC and modified sodium alginate of 8:1 includes the following steps:

[0044] (1) Preparation of polyaluminum chloride

[0045] 22.3546g AlCl 3 ·6H 2 O is dissolved in 100ml deionized water, take 9.8125g Na 2 CO 3 Add a little distilled water to dissolve, add Na under magnetic stirring 2 CO 3 Adjust the alkalinity of the solution, stir and react for 2h at room temperature, and dilute the volume to 250mL to obtain a polyaluminum chloride solution with an alkalinity of 2 and a concentration of 10g / L;

[0046] (2) Preparation of modified sodium alginate

[0047] Weigh 1.0 g of natural sodium alginate SA, add 100 mL of deionized water and stir thoroughly at a temperature of 50°C. After the sodium alginate is completely dissolved in water, add it to a reactor equipped with a stirring device, protected by nitrogen, and wait for the reaction After the oxyge...

Embodiment 2

[0052] Preparation of polyaluminum-modified sodium alginate inorganic-organic composite flocculant with a 4:1 composite ratio of PAC and modified sodium alginate. The preparation method is the same as that of Example 1, except that:

[0053] In step (3), the added amount of modified sodium alginate with a concentration of 1 g / L is 25 mL.

Embodiment 3

[0055] Preparation of polyaluminum-modified sodium alginate inorganic-organic composite flocculant with a composite ratio of PAC and modified sodium alginate at 2:1. The preparation method is the same as that in Example 1, except that:

[0056] In step (3), the added amount of modified sodium alginate with a concentration of 1 g / L is 50 mL.

[0057] Comparative Example 1 Preparation of PAC with a degree of alkalinity of 2, and a concentration of 10 g / L:

[0058] (1) Weigh 22.3546g of AlCl3·6H2O solid in a beaker, add an appropriate amount of distilled water to dissolve, place on a magnetic stirrer, weigh 9.8125g of Na2CO3 and add a little distilled water to dissolve. Under magnetic stirring, Na2CO3 solution was added dropwise to AlCl3 solution. After the addition, stirring was continued for 2 hours, and the volume was adjusted to 250 mL, and then polyaluminum chloride with a degree of alkalinity of 2, 10g / L was obtained.

[0059] (2) Dilute the above 10mL PAC to 100mL to obtain 1g / L P...

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Abstract

The invention relates to a PAC (polyaluminium chloride)-modified sodium alginate inorganic-organic composite flocculant and a preparation method thereof. The flocculant is prepared by carrying out hybrid reaction on polyaluminium chloride and modified sodium alginate in a mass ratio of (2-10):1, and the modified sodium alginate flocculant is prepared by taking sodium alginate SA, acrylamide, and dimethyl diallyl ammonium chloride as main raw materials and taking ammonium persulfate as an initiator through performing a grafting copolymerization reaction. The whole reaction is completed in the same reactor, so that the production process is simple; and the whole reaction is mild in conditions and easy to control. The process of compounding with PAC is simple, and a prepared composite coagulant has the characteristics of stable properties, less application amount, good flocculation effect, high treatment efficiency, low sludge production and the like, therefore, the coagulant can be widely applicable to water supply and wastewater treatment.

Description

Technical field [0001] The invention relates to a polyaluminum-modified sodium alginate inorganic organic composite flocculant and a preparation method thereof, and belongs to the technical field of environmental chemistry. Background technique [0002] In the field of environmental protection technology today, water treatment chemicals are the most widely used and the largest amount of special products in the current water industry, water pollution control and water-saving purification treatment engineering fields. Water treatment chemicals are high-tech and high value-added products, which to a large extent determine the innovative development of water treatment technology and equipment, the simplification of facilities and technological processes, operating costs and the quality of water purification. Therefore, new and high-efficiency water treatment chemicals have always been a key development pillar industry in the field of water treatment environmental protection technolog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
CPCC02F1/52
Inventor 王燕孙阳阳高宝玉岳钦艳李倩
Owner SHANDONG UNIV
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