Straw/aluminium polychlorid composite water treatment material and preparation method thereof

A polyaluminum chloride, water treatment technology, applied in water/sewage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. Abundant sources of raw materials, the effect of solving the high concentration of water and aluminum ions

Active Publication Date: 2019-01-18
FUQING BRANCH OF FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of treating water with a single polyaluminum chloride flocculant, the concentration of aluminum ions in the solution often increases, and the concentration of aluminum ions in water is too high to cause human health problems such as Alzheimer's disease

Method used

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  • Straw/aluminium polychlorid composite water treatment material and preparation method thereof
  • Straw/aluminium polychlorid composite water treatment material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) Put 20g of fly ash in a reaction bottle, add 60 mL of 10wt% hydrochloric acid solution to soak for 5 hours, then add 20wt% sodium hydroxide solution to adjust the pH to 11, filter, and in the obtained filtrate by volume Add 10wt% hydrochloric acid solution at a ratio of 1:1, react at 70°C for 1.5 hours under stirring conditions; filter and separate after the reaction to obtain a filtrate containing aluminum chloride, add 6g of calcium carbonate powder to the obtained filtrate to adjust the basicity , after stirring, filtering, and drying the filtrate, polyaluminum chloride powder is obtained (the undried filtrate can also be directly used as a water purifying agent);

[0024] 2) At room temperature, the rice straw was washed with water to remove soil, dried and crushed, and then added to 5wt% sodium hydroxide solution to prepare a solution with a straw concentration of 2wt%, and then stirred rapidly at 200 r / min. Stir at a slow speed of 120 r / min for 24 hours to obta...

Embodiment 2

[0029] 1) Put 20g of fly ash in the reaction bottle, add 60 mL, 20wt% hydrochloric acid solution to soak for 6 hours, then add 25wt% sodium hydroxide solution to adjust the pH to 12, filter, and in the obtained filtrate according to the volume ratio Add 15wt% hydrochloric acid solution at 1:1, react at 80°C for 1.5 hours under stirring conditions; filter and separate after the reaction to obtain a filtrate containing aluminum chloride, add 7g of calcium carbonate powder to the obtained filtrate to adjust the basicity, After stirring, filtering, and drying the filtrate, polyaluminum chloride powder is obtained (the undried filtrate can also be directly used as a water purifier);

[0030] 2) At room temperature, the rice straw was washed with water to remove soil, dried and crushed, then added to 10wt% sodium hydroxide solution to prepare a solution with a straw concentration of 3wt%, and then stirred rapidly at 230 r / min. Stir at a slow speed of 130 r / min for 24 hours to obtain...

Embodiment 3

[0035] 1) Put 20g of fly ash in a reaction bottle, add 60 mL of 30wt% hydrochloric acid solution to soak for 8 hours, then add 30wt% sodium hydroxide solution to adjust the pH to 13, filter, and in the obtained filtrate by volume Add 10wt% hydrochloric acid solution at a ratio of 1:1 mL, react at 90°C for 1.5 hours under stirring conditions; filter and separate after the reaction to obtain a filtrate containing aluminum chloride, add 8g of calcium carbonate powder to the obtained filtrate to adjust the base degree, after stirring, filtering, and drying the filtrate, polyaluminium chloride powder is obtained (the undried filtrate can also be directly used as a water purifying agent);

[0036] 2) At room temperature, the rice straw was washed with water to remove soil, dried and crushed, then added to 15wt% sodium hydroxide solution to prepare a solution with a straw concentration of 5wt%, and then stirred rapidly at 250 r / min. Stir at a slow speed of 150 r / min for 24 hours to o...

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Abstract

The invention discloses a straw/aluminium polychlorid composite water treatment material and a preparation method thereof. The method comprises the following steps: by adopting a liquid phase method,taking coal ash as a raw material to prepare aluminium chloride powder, mixing the aluminium chloride powder and rice straw to prepare a composite material with good water treatment effect. The composite material is prepared by taking industrial waste coal ash and agricultural waste straw as raw materials at normal temperature and under normal pressure, so that the price is cheap; the composite material has good flocculating performance, and good processing capacity for the waste water, the advantage of aluminium salt polymer in water treatment process is played, the residual amount of aluminium ions after processing the aluminium salt polymer is reduced, the negative effect caused by the entering of the aluminium ions to water environment can be maximumly improved, the problem of the toohigh concentration of aluminium ions in water processed by a traditional aluminium salt flocculant is solved, the harm to human health is effectively avoided and the material is suitable for processing the waste water in a large scale.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a straw / polyaluminum chloride composite water treatment material and a preparation method thereof. Background technique [0002] Straw comes from agricultural waste and is a renewable resource in nature. It is rich in cellulose, hemicellulose and lignin, and has a large number of active groups such as hydroxyl groups on its molecular chain, which can be used as a price Inexpensive organic polymer, and has good flocculation and complexation adsorption for pollutants in water. [0003] Fly ash is the main solid waste discharged from coal-fired power plants. The main oxide composition of fly ash is: SiO 2 、Al 2 o 3 , FeO, Fe 2 o 3 , CaO, TiO 2 Wait. Al in these oxides 2 o 3 The content is the highest, reaching about 60%, while Al 2 o 3 It is the raw material for the production of polyaluminum salt. As a traditional flocculant, polyaluminum chlorid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/56C02F101/30C02F101/20
CPCC02F1/5236C02F1/56C02F2101/20C02F2101/308
Inventor 李世迁陈庆华周晓艳曾华敬
Owner FUQING BRANCH OF FUJIAN NORMAL UNIV
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