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A kind of preparation method of grapefruit peel natural coagulant

A pomelo peel and coagulant technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water pollutants, etc., can solve the problems of reduction, not involving the preparation technology of pomelo peel, etc., to reduce costs and improve Decontamination effect, no secondary pollution effect

Inactive Publication Date: 2018-05-08
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition to a large amount of cellulose, grapefruit peel also contains polysaccharides and pectin substances, so there is a basis for preparing coagulants for water treatment. However, the above-mentioned applications of grapefruit peels in the field of environmental protection do not involve natural coagulants of grapefruit peels. At present, there is no relevant report on the natural coagulant of grapefruit peel for reducing pollutants in water prepared by using grapefruit peel as the main raw material in domestic and foreign literature databases.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Dry the pomelo peel and crush it into powder. At a stirring speed of 50 rpm to 100 rpm, add 60L of water at 50°C to 10Kg of pomelo peel powder, stir for 2 minutes, and then continue heating at 50°C for 0.5 hours to obtain an extraction mixture liquid, spare. At a stirring speed of 200 rpm to 400 rpm and a temperature of 50°C, add 0.1 L of a 40% sodium hydroxide solution to the above extraction mixture and stir for 5 minutes to obtain the alkali Polymerizing, then continuously heating at 50°C for 0.1 hour, standing and aging at room temperature, and controlling the aging time to 3 hours, to obtain a natural coagulant liquid product of pomelo peel.

Embodiment 2

[0026] Dry the pomelo peel and crush it into powder. At a stirring speed of 50 rpm to 100 rpm, add 40L of water at 60°C to 10Kg of pomelo peel powder, stir for 5 minutes, and then continue heating at 60°C for 1.5 hours to obtain an extraction mixture liquid, spare. At a stirring speed of 200 rpm to 400 rpm and a temperature of 60°C, add 0.5 L of sodium hydroxide solution with a mass fraction of 40% to the above extraction mixture and stir for 5 minutes to obtain the alkali poly liquid, spare. Under the conditions of stirring speed of 200 rpm ~ 400 rpm and temperature of 60 °C, add 0.5 L of ethanol solution with a mass fraction of 40% to the above alkali poly solution, stir for 5 minutes, and then Continue heating at a temperature of 0.1 hour to obtain an alkali-alcohol polyliquid, leave it to mature at room temperature, and control the curing time to 6 hours to obtain a natural coagulant liquid product of pomelo peel.

Embodiment 3

[0028]Dry the pomelo peel and crush it into powder. At a stirring speed of 50 rpm to 100 rpm, add 30L of water at 80°C to 10Kg of pomelo peel powder, stir for 5 minutes, and then continue heating at 80°C for 2 hours to obtain an extraction mixture liquid, spare. At a stirring speed of 200 rpm to 400 rpm and a temperature of 80°C, add 1 L of sodium hydroxide solution with a mass fraction of 50% to the above extraction mixture and stir for 10 minutes to obtain alkali poly liquid, spare. At a stirring speed of 200 rpm to 400 rpm and a temperature of 80°C, add 1.5L of ethanol solution with a mass fraction of 99.5% to the above-mentioned alkali poly solution, stir for 5 minutes, and then heat at 80°C Continue heating at a temperature of 0.5 hour to obtain an alkali-alcohol polyliquid, which is set aside. Add 0.1 L of sodium hypochlorite solution with a mass fraction of 13% to the above-mentioned alkali-alcohol poly solution, stir for 3 minutes to obtain an alkali-alcohol poly-mi...

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Abstract

The invention belongs to the field of water treatment, and relates to a preparation method of a natural coagulant of pomelo peel, which comprises the following steps: (1) adding a certain amount of water to pulverized pomelo peel powder for leaching; (2) adding a small amount Sodium hydroxide solution, heating alkali polymerization; (3) Optionally add a certain amount of ethanol, sodium hypochlorite and stabilizer to obtain coagulant products with different effects and stability. The technology of the present invention can prepare a pomelo peel with high utilization rate, low preparation cost, pH value of effluent in the neutral or weakly alkaline range, good stability, and excellent water treatment effect, especially for chroma, A natural coagulant made from grapefruit peel with high heavy metal removal efficiency. The natural pomelo peel coagulant in the invention can be widely used in the fields of drinking water, urban sewage, industrial waste water and the like.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a preparation method of a natural pomelo peel coagulant. Background technique [0002] Coagulant is a water treatment agent widely used in the field of water and wastewater treatment, and its function of removing pollutants in water is realized through the coagulation process. In drinking water treatment, the coagulant can reduce the relevant physical and chemical indicators such as raw water turbidity and color through the coagulation process, and can also realize the removal of various harmful substances and microorganisms in the water. The quality of the coagulation effect has a great influence on the operation conditions of the subsequent water treatment unit, the final effluent water quality and the cost of water treatment. Therefore, the research and development of high-efficiency, non-toxic and low-cost coagulants has always been the core technology of the coagulation proce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F1/66
CPCC02F1/5263C02F1/66C02F2101/105C02F2101/20C02F2101/308
Inventor 付英付旻舸陆宁宁
Owner UNIV OF JINAN
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