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Modified pumice absorbing material and preparation method as well as application thereof

An adsorption material, pumice technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of difficult practical application, low adsorption activity, small red mud particle size, etc. The raw materials are easily available and the raw materials are widely used

Active Publication Date: 2012-06-13
SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, red mud has small particle size and high volatile content, and it is difficult to be practically applied without modification; while natural pumice, as a porous material, has low adsorption activity

Method used

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  • Modified pumice absorbing material and preparation method as well as application thereof
  • Modified pumice absorbing material and preparation method as well as application thereof
  • Modified pumice absorbing material and preparation method as well as application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation process of modified pumice adsorption material of the present invention is:

[0033] Prepare modified pumice adsorbent: the pumice (the pumice in the following examples is the same as this example) produced by the selected Yunnan Tengchong Volcanic Pumice Factory is obtained through crushing, sieving, and grinding to obtain a sieving particle size of 2~5mm pumice particles, and 500g Pumice particles were soaked and pickled by adding 1000ml of nitric acid solution with a concentration of 1.0mol / L for 4 hours, filtered and washed with water until the pH of the filtrate was 6.5, and the filter residue was dried at 95°C for 3 hours, and then roasted at 600°C for 6 hours. After cooling, the pumice adsorbent to be modified is obtained;

[0034] Preparation of red mud impregnation solution: the red mud produced by the Bayer process of China Aluminum Industry Zhongzhou Branch Company (the red mud in the following examples is the same as this example, and the red...

Embodiment 2

[0037] The preparation process of modified pumice adsorption material of the present invention is:

[0038]Preparation of modified pumice adsorbent: crush, sieve, and grind the selected pumice to obtain pumice particles with a sieving particle size of 2 to 5mm, add 1000g of pumice particles to 1000ml of 0.1mol / L nitric acid solution for soaking and pickling, soak Filter after 2 hours, wash with water until the filtrate pH=7.5, dry the filter residue at 90°C for 4 hours, then roast at 550°C for 4 hours, and cool naturally to prepare the pumice adsorbent to be modified;

[0039] Preparation of red mud impregnation solution: add 4000g red mud to 1000ml 0.1mol / L nitric acid solution, react for 30min and filter to obtain red mud impregnation solution;

[0040] Pumice modification: Put the pumice adsorbent to be modified into the red mud immersion liquid, place it in a vibrating water bath and soak it at 60°C for 4 hours for modification treatment, add 1000g of the pumice adsorbent ...

Embodiment 3

[0042] The preparation process of modified pumice adsorption material of the present invention is:

[0043] Preparation of modified pumice adsorbent: crush, sieve, and grind the selected pumice to obtain pumice particles with a sieving particle size of 2 to 5 mm, add 750 g of pumice particles to 1000 ml of 0.5 mol / L nitric acid solution for soaking and pickling, soak Filter after 3 hours, wash with water until the pH of the filtrate = 7.0, dry the filter residue at 92°C for 3.5 hours, roast at 575°C for 5 hours, and cool naturally to prepare the pumice adsorbent to be modified;

[0044] Preparation of red mud impregnation solution: add 4500g red mud to 1000ml 0.5mol / L nitric acid solution, react for 60min and filter to obtain red mud impregnation solution;

[0045] Pumice modification: Put the pumice adsorbent to be modified into the red mud immersion solution, place it in a vibrating water bath and soak it at 70°C for 6 hours for modification treatment, add 750g of the pumice...

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Abstract

The invention belongs to the field of preparation of environmental-friendly absorbing materials and discloses a modified pumice absorbing material and a preparation method as well as application of the modified pumice absorbing material, wherein the pumice is modified by utilizing active ingredients in red mud. The preparation method comprises the following steps of: after soaking pumice particles with grain size of 2-10 mm by using a nitric acid solution, cleaning by using water, and then filtering, drying, roasting and cooling to obtain a pumice absorbent to be modified; adding the red mud into the nitric acid solution, stirring for reaction for 30-90 minutes, and filtering to obtain red mud impregnation liquid; putting the pumice absorbent to be modified into the red mud impregnation liquid, soaking at 60-80 DEG C for 4-8 hours, filtering and drying, heating to 1000-12000 DEG C by means of a procedure for roasting, and cooling to obtain the modified pumice absorbing material. The material has the advantages of recycling property, widely and easily obtainable raw materials, low cost, good treatment effect and higher removal rate in particular for total nitrogen and total phosphorus in the sewage, and can be used for secondary and deep treatment of all kinds of sewage, reuse treatment of recycled water and the like.

Description

technical field [0001] The invention belongs to the field of environmental protection, and relates to a preparation method of an adsorption material, in particular to a modified pumice adsorption material obtained by modifying pumice with effective components in red mud, a preparation method and application thereof, and the adsorption material can be used for sewage treatment. Background technique [0002] my country's water resource reserves rank sixth in the world, but per capita water resources are relatively poor. Over the years, my country's economy has developed in an extensive mode, showing the characteristics of high consumption, high pollution, and low efficiency. The outstanding performance is that a large amount of industrial wastewater and urban sewage are directly discharged into various water environments without treatment, causing various water bodies in the country to suffer. heavily polluted. According to environmental monitoring statistics in 2008, about 50...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/30C02F1/28
Inventor 黄建洪虢清伟许振成彭福全夏锐杨丽萍张鹏飞
Owner SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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