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Humic acid esterification and etherification modification based adsorption material and preparation method thereof

An adsorption material and esterification technology, applied in chemical instruments and methods, adsorption water/sewage treatment, alkali metal oxides/hydroxides, etc., can solve the problems of secondary pollution, high preparation cost, easy to fall off, etc. To achieve the effect of efficient recovery and good adsorption

Inactive Publication Date: 2017-06-13
SICHUAN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method is simple and has a good removal efficiency for micro-trace organic chlorine pollutants in water bodies, its preparation cost is high, and the obtained environmental materials are not stable enough and easy to fall off, causing secondary pollution during use.

Method used

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  • Humic acid esterification and etherification modification based adsorption material and preparation method thereof
  • Humic acid esterification and etherification modification based adsorption material and preparation method thereof
  • Humic acid esterification and etherification modification based adsorption material and preparation method thereof

Examples

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Embodiment 1

[0032] The specific preparation method of the etherified humate adsorption material for adsorbing organic chlorine pollutants in this embodiment is as follows:

[0033] 1) Humate esterification: Slowly add glycerin and palmitic acid into a round bottom flask successively, then stir and add humic acid passed through a 200-mesh sieve in an oil bath at 150°C, and then add concentrated sulfuric acid catalyst to react for 20 hours. Afterwards, the esterified humic acid is obtained by suction filtration, washing and drying. Wherein, the volume ratio of palmitic acid and glycerol is 3; the mass ratio of palmitic acid and glycerin total volume to humic acid is 5ml / g, and the volume that the concentrated sulfuric acid catalyst adds is 2% of total reaction volume.

[0034] 2) Etherification of esterified humic acid: Add the above-mentioned esterified humic acid into a certain amount of water, react in a water bath at 50°C, and use dilute HNO 3 Adjust the pH to 5 with dilute NaOH soluti...

Embodiment 2

[0038] The specific preparation method of the etherified humate adsorption material for adsorbing organic chlorine pollutants in this embodiment is as follows:

[0039] 1) Esterification of humic acid: slowly add glycerin and oleic acid into a round-bottomed flask successively, then stir and add humic acid passed through a 300-mesh sieve in an oil bath at 180°C, and then add concentrated sulfuric acid catalyst to react for 25 hours. Afterwards, the esterified humic acid is obtained by suction filtration, washing and drying. Wherein, the volume ratio of oleic acid and glycerol is 2; the mass ratio of oleic acid and glycerin total volume to humic acid is 4ml / g, and the volume that the concentrated sulfuric acid catalyst adds is 1% of total reaction volume.

[0040] 2) Etherification of esterified humic acid: Add the above-mentioned esterified humic acid into a certain amount of water, react in a water bath at 60°C, and use dilute HNO 3 Adjust the pH to 6 with dilute NaOH soluti...

Embodiment 3

[0043] The specific preparation method of the etherified humate adsorption material for adsorbing organic chlorine pollutants in this embodiment is as follows:

[0044] 1) Humic esterification: Slowly add glycerin and linoleic acid into a round-bottomed flask successively, then stir and add humic acid passed through a 400-mesh sieve in an oil bath at 120°C, and then add concentrated sulfuric acid catalyst to react for 28 hours. After the reaction, the esterified humic acid is obtained by suction filtration, washing and drying. Wherein, the volume ratio of linoleic acid and glycerol is 6; the mass ratio of linoleic acid and glycerin total volume to humic acid is 7ml / g, and the volume that the concentrated sulfuric acid catalyst adds is 5% of total reaction volume.

[0045] 2) Etherification of esterified humic acid: Add the above-mentioned esterified humic acid into a certain amount of water, react in a water bath at 80°C, and use dilute HNO 3 Adjust the pH to 4 with dilute Na...

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Abstract

The invention provides a humic acid esterificaton and etherification modification based adsorption material and belongs to the technical field of environmental adsorption materials. The adsorption material is characterized in that esterified humic acid is prepared from humid acid, glycerinum and organic acid under the action of an acid catalyst, and the esterified and etherized humid acid adsorption material is prepared under the action of reduced ether. The invention further relates to the preparation method of the adsorption material. The adsorption rate of the etherified humic acid ester adsorption material on 2, 4, 6-trichlorophenol can reach more than 91%; meanwhile, the etherized humic acid ester adsorption material has preferential adsorption and good hydrophobic performance on organic chloride pollutants in media of water, soil and the like, the adsorption material can be separated from the soil and water by the aid of the hydrophobic property after the organic chloride pollutants are adsorbed, efficient separation and enrichment of the organic chloride pollutants and soil and high-efficiency recovery and the humic acid modified material are realized, and pollution to environment is lowered.

Description

technical field [0001] The invention belongs to the technical field of environmental adsorption materials, in particular to an adsorption material based on humic esterification and etherification modification and a preparation method thereof. Background technique [0002] As a large category of organochlorine pollutants, organochlorine pesticides have been widely used all over the world because of their broad-spectrum and high-efficiency insecticidal and herbicidal effects. Chlorine-containing organic pollutants are easy to accumulate in organisms, especially in fat-soluble cells such as fat; biological organisms can directly ingest and accumulate these substances from environmental media or consumed food during growth and development, which is harmful to human health and serious harm to the ecological environment. Due to their special structure and properties, organochlorine pollutants have long-term residual, semi-volatile and bioaccumulative properties in the environment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/34C02F101/36
CPCB01J20/24B01J20/22B01J20/28C02F1/286C02F2101/345C02F2101/36
Inventor 赵仕林马崇迪冯馨李越罗凤马骏
Owner SICHUAN NORMAL UNIVERSITY
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