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Composite adsorbing material for removing heavy chromate in water and preparation method thereof

A composite adsorption material and dichromate technology, applied in the field of materials, can solve the problem that removal and recovery cannot meet the requirements at the same time, and achieve the effect of high porosity, good adsorption performance and low volume density

Inactive Publication Date: 2013-01-16
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiency that the existing adsorption materials cannot meet the requirements simultaneously in both removal and recovery, and provide a composite adsorption material for removing dichromate in water and a preparation method thereof. The present invention is a novel Composite adsorption material has the characteristics of high adsorption efficiency, simple operation, low cost, high recycling rate, regeneration, and no secondary pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0024] After drying and sieving raw materials such as industrial adhesives and pore-forming agents, the products under the sieve are fully mixed according to a certain mass ratio. It is fired into granular porous ceramsite. Select the crab shell raw material, wash it with water for 3 minutes, dry it, and then screen the raw material of 200, 400, and 600 meshes after preliminary crushing, put the raw material in a vacuum drying oven, adjust the temperature to 70°C for drying, and use 0.05g / s The speed and the air pressure are 0.66MPa. The raw materials are evenly added to the jet mill, and the samples are taken out after completion. After soaking the ceramsite in HCl solution for 20 hours, rinse it with natural water and distilled water until the pH of the cleaning solution no longer drops. Dry for 2 hours; then wash the ceramsite with NaOH solution, rinse with tap water and distilled water in turn until the pH of the cleaning solution is neutral, and finally dry at 100°C to o...

example 2

[0026] After drying and sieving industrial clay, pore-forming agent and other raw materials, the products under the sieve are fully mixed according to a certain mass ratio. It is fired into granular porous ceramsite. Select the raw material of crab shell, wash it with water for 4 minutes, dry it, and then screen out the raw material of 200, 400, and 600 mesh after preliminary crushing, put the raw material in a vacuum drying oven, adjust the temperature to 75°C for drying, and use 0.05g / The speed of s, the air pressure is 0.66MPa, and the raw materials are evenly added to the jet mill, and the sample is taken out after completion. After soaking the ceramsite in HCl solution for 22 hours, rinse it with tap water and distilled water until the pH of the cleaning solution no longer drops. After drying, mix the ceramsite and the crab shell powder aqueous solution evenly, and dry it in a water bath, and then dry it at 105°C for 3 hours ; Then wash the ceramsite with NaOH solution,...

example 3

[0028] After drying and sieving industrial clay, pore-forming agent and other raw materials, the products under the sieve are fully mixed according to a certain mass ratio. It is fired into granular porous ceramsite. Select the crab shell raw material, wash it with water for 5 minutes, dry it, and then screen the raw material of 200, 400, and 600 meshes after preliminary crushing, put the raw material in a vacuum drying oven, adjust the temperature to 80°C for drying, and use 0.05g / s The speed and the air pressure are 0.66MPa. The raw materials are evenly added to the jet mill, and the samples are taken out after completion. After soaking the ceramsite in HCl solution for 24 hours, rinse it with tap water and distilled water until the pH of the cleaning solution no longer decreases. After drying, mix the ceramsite and the crab shell powder aqueous solution evenly, and dry it in a water bath, and then dry it at 110°C for 4 hours; then Clean the ceramsite with NaOH solution, th...

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Abstract

The invention discloses a novel and efficient composite adsorbing material obtained by loading crab shell powder on granular porous ceramsites, which belongs to the field of water treatment. The invention also discloses a method of using the granular porous ceramsites loaded with the crab shell powder to remove the heavy chromate in water, i.e., using the granular porous ceramsites loaded with the crab shell powder to adsorb and remove the heavy chromate ions in the water under a neutral condition. According to the invention, the heavy chromate ions in the water are removed by an adsorption process, but the removal and recycling and reusing effects of the composite adsorbing material are obviously superior to those of the traditional adsorbing material. In addition, the invention has the advantages that the operation is simple, the materials are easy to obtain, the cost is low, the recycling rate is large, the regeneration is realized, and no secondary pollution is caused. Therefore, the composite adsorbing material for removing the heavy chromate in the water, provided by the invention, can be used for removing the heavy chromate ions in waste water, and has good economic and environmental benefits.

Description

technical field [0001] The invention relates to a composite adsorption material for removing dichromate in water and a preparation method thereof, in particular to a novel material prepared by loading crab shell powder in granular porous ceramsite, and belongs to the field of water purification treatment. Background technique [0002] Dichromate ion (Cr 2 o 7 2- ) is the highest valence state in the chromium series, has strong oxidizing properties, and is extremely soluble in water. Dichromate causes harm to the human body through different ways, such as invading the human body through the digestive tract, respiratory tract, skin, etc., causing nausea, vomiting and other adverse reactions, and can even lead to lung cancer. In addition, it can also accumulate in plants and animals through bioaccumulation, causing long-term threats to the ecological environment. According to China's "Integrated Wastewater Discharge Standard", the discharge concentration of chromium-contain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F101/22
Inventor 雷春生陈蓉蓉雷思宇
Owner CHANGZHOU UNIV
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