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Modified diatomite adsorbent for removing chromium in polluted water and preparation method thereof

A technology of diatomite and adsorbent, which is applied in the field of modified diatomite adsorbent and its preparation, and can solve the problems of lack of adsorbent materials, etc.

Inactive Publication Date: 2017-05-10
北京源清益壤环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still a lack of cheap and efficient adsorption materials for removing chromium in polluted water. Therefore, the development of modified diatomite adsorbents for removing chromium in polluted water is of great significance for the treatment of heavy metal pollution in polluted water.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] (1) Add 33.48g of diatomaceous earth to 250mL of nitric acid solution with a concentration of 10% by mass, stir at 1000r / min for 50 minutes, filter to remove the liquid, wash with 500mL of deionized water and place in a drying oven at 105°C Placed in the medium for 35 minutes to obtain substance A0;

[0050] (2) 9.68g chitosan is added to 800mL of 5% acetic acid solution in mass percent concentration, stirred for 3 minutes under the condition of 1000r / min, shaken up and divided into 4 equal parts to obtain mixed solution G1 and mixed solution G2 , mixed solution G3, mixed solution G4;

[0051] (3) Add 6.27 g of 2,6-dimethoxy-β-cyclodextrin and 50 mL of dimethyl sulfoxide into 150 mL of isopropanol, stir for 3 minutes at 1000 r / min, shake well and divide into equal parts Measure 4 parts to obtain mixed solution H1, mixed solution H2, mixed solution H3, and mixed solution H4;

[0052] (4) Add mixed solution H1 and 8mL methylthiopropylene oxide into mixed solution G1, an...

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Abstract

The invention discloses a modified diatomite adsorbent for removing chromium in polluted water. After being cleaned, diatomite is modified by a mixed solution prepared from chitosan, acetic acid, 2,6-dimethoxy-Beta-cyclodextrin, dimethyl sulfoxide, isopropyl alcohol and [(methylthio)methyl]oxirane, so that a substance A is prepared; the substance A is modified by a mixed solution prepared from TiCl4, SbCl3, Mn(NO3)2 and Mg(NO3)2, so that a substance B is prepared; the substance B is modified by a mixed solution prepared from tetrabutyl titanate, (3,3,3-trifluoropropyl)dichloromethylsilane and tetramethylbutanediamine, so that a substance C is prepared; and the substance C is modified by a mixed solution prepared from acrylic acid, potassium persulfate, polyvinylpyrrolidone and methylphenyldichlorosilane, so that a substance, i.e. the modified diatomite adsorbent for removing the chromium in the polluted water, is obtained.

Description

technical field [0001] The invention belongs to the technical field of heavy metal pollution treatment in polluted water, and in particular relates to a modified diatomite adsorbent for removing chromium in polluted water and a preparation method thereof. Background technique [0002] Due to the characteristics of high toxicity, refractory, and persistence of heavy metals, heavy metal pollution in water bodies has become a serious and common environmental problem, which has attracted extensive attention from domestic and foreign scholars. Heavy metals can interact with proteins in the human body to inactivate them, and they can also accumulate in certain organs of the human body. If they exceed the limit that the human body can bear, they will affect the lungs, kidneys, liver and other important organs through blood circulation. , can cause poisoning and other diseases, and is extremely harmful to the human body. Therefore, it is of great social, economic and environmental ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24C02F1/28B01J20/30C02F101/22
CPCB01J20/12B01J20/0211B01J20/0222B01J20/0259B01J20/04B01J20/103B01J20/24C02F1/288C02F2101/22
Inventor 不公告发明人
Owner 北京源清益壤环保科技有限公司
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