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A kind of polyaluminium-modified sodium alginate inorganic-organic composite flocculant and preparation method thereof

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

Active Publication Date: 2017-01-25
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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  • A kind of polyaluminium-modified sodium alginate inorganic-organic composite flocculant and preparation method thereof
  • A kind of polyaluminium-modified sodium alginate inorganic-organic composite flocculant and preparation method thereof
  • A kind of polyaluminium-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 the polyaluminum-modified sodium alginate inorganic-organic composite flocculant with a composite ratio of PAC and modified sodium alginate of 8:1 comprises the following steps:

[0044] (1) Preparation of Polyaluminum Chloride

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

[0046] (2) Preparation of modified sodium alginate

[0047] Weigh 1.0g of natural sodium alginate SA, add 100mL deionized water and stir fully 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, protect it under nitrogen, and wa...

Embodiment 2

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

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

Embodiment 3

[0055] The preparation of polyaluminum-modified sodium alginate inorganic-organic composite flocculant with a composite ratio of PAC and modified sodium alginate of 2:1, the preparation method is the same as in Example 1, the difference is 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 degree of alkalinity is 2, the preparation of the PAC of concentration 10g / L:

[0058] (1) Weigh 22.3546g of AlCl3·6H2O solid in a beaker, add 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. Add Na2CO3 solution dropwise to the AlCl3 solution under magnetic stirring, continue to stir for 2 hours after the dosing, and set the volume to 250mL to obtain polyaluminum chloride with a degree of alkalinity of 2.10g / L.

[0059] (2) Pipette the above 10mL PAC and dilute to 100mL to obtain 1g / L PAC for use.

...

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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, belonging to the technical field of environmental chemistry. Background technique [0002] In today's environmental protection technology field, water treatment chemicals are the most widely used and most used special products in the current water industry, water pollution control and water-saving reuse purification engineering technology fields. Water treatment chemicals are high-tech and high value-added products, which largely determine the innovative development of water treatment technology and equipment, simplification of facilities and process flow, operating costs and water purification quality. Therefore, new and high-efficiency water treatment chemicals have always been the pillar industry for key development in the field of water treatment and environmental protection technology, and also the basic industr...

Claims

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Application Information

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Patent Type & Authority Patents(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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