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Preparation method of polyacrylic acid-humic acid-rectorite composite adsorbing agent

A polyacrylic acid and composite adsorption technology, which is applied in chemical instruments and methods, adsorption of water/sewage treatment, alkali metal compounds, etc., can solve the problem of not being able to adsorb hydrophobic organic pollutants, achieve good adsorption effect, and increase the interlayer distance , high adsorption efficiency

Inactive Publication Date: 2012-09-12
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polymer / clay composite adsorption materials that have been developed are mainly used to adsorb heavy metal ions and cationic dyes with strong hydrophilicity, and cannot adsorb hydrophobic organic pollutants, such as polycyclic aromatic hydrocarbons, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Weigh 10 parts of rectorite and add 100 parts of water to prepare a rectorite water suspension, then add 1.0 parts of cetyltrimethylammonium bromide, adjust the pH value to 6.5, stir and react in a water bath at 70°C for 24 hours, the product Wash with plenty of deionized water until no residual Br - Dry and grind to 200 mesh to obtain organic rectorite. Weigh 1.2 parts of acrylic acid, add 25 parts of deionized water, and dissolve. Then 0.5 part of NaOH was added under the condition of ice-water bath, and the reaction was stirred for 10 min. The above-mentioned acrylic acid aqueous solution was transferred to a four-necked flask, under N 2 Under protection, add 2.6 parts of organic rectorite and 0.2 parts of humic acid, stir well for 10 minutes, then slowly add 0.005 parts of cross-linking agent N,N'-methylenebisacrylamide and 0.03 parts of initiator potassium persulfate, put the water bath The temperature was raised to 40°C, the pre-polymerization was carried out f...

Embodiment 2

[0020] Weigh 8 parts of rectorite and add 120 parts of water to prepare a rectorite water suspension, then add 0.5 part of cetyltrimethylammonium bromide, adjust the pH value to 6.5, stir and react in a water bath at 70 °C for 20 hours, the product Wash with plenty of deionized water until no residual Br - Dry and grind to 180 mesh to obtain organic rectorite. Weigh 1.0 parts of acrylic acid, add 20 parts of deionized water, and dissolve. Then 0.3 part of NaOH was added under the condition of ice-water bath, and the reaction was stirred for 15 minutes. The above-mentioned acrylic acid aqueous solution was transferred to a four-necked flask, under N 2 Under protection, add 2 parts of organic rectorite and 0.1 part of humic acid, stir well for 10 minutes, then slowly add 0.003 part of cross-linking agent N,N'-methylenebisacrylamide and 0.01 part of initiator potassium persulfate, put the water bath The temperature was raised to 40°C, the pre-polymerization was carried out for...

Embodiment 3

[0023] Weigh 12 parts of rectorite and add 120 parts of water to prepare rectorite water suspension, then add 1.5 parts of cetyltrimethylammonium bromide, adjust the pH value to 6.0, stir and react in a water bath at 70°C for 24 hours, the product Wash with plenty of deionized water until no residual Br - Dry and grind to 240 mesh to obtain organic rectorite. Weigh 1.2 parts of acrylic acid, add 24 parts of deionized water, and dissolve. Then, 0.6 parts of NaOH was added under ice-water bath conditions, and the reaction was stirred for 20 minutes. The above-mentioned acrylic acid aqueous solution was transferred to a four-necked flask, under N 2Under protection, add 2.4 parts of organic rectorite and 0.3 parts of humic acid, stir well for 10 minutes, then slowly add 0.008 parts of cross-linking agent N,N'-methylene bisacrylamide and 0.04 parts of initiator potassium persulfate, put the water bath The temperature was raised to 40°C, the pre-polymerization was carried out for...

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Abstract

The invention discloses a preparation method of a polyacrylic acid-humic acid-rectorite composite adsorbing agent, which adopts organic quaternary ammonium salt and rectorite to generate a cation exchange reaction to form organic rectorite, then enables the crylic acid to conduct in-situ polymerization on a nanometer interlayer of the organic rectorite to form an intercalation polymer / clay composite material, simultaneously loads the humic acid, and prepares the polyacrylic acid-humic acid-rectorite composite adsorbing agent. The preparation method takes full advantage of the rectorite and the humic acid on excellent adsorbability of polycyclic aromatic hydrocarbon and high-efficient adsorbability of polyacrylic acid on heavy metal, enables the adsorbing agent to simultaneously adsorbing the heavy metal and the polycyclic aromatic hydrocarbon, and simultaneously expresses the superiority of the polyacrylic resin on rate of adsorption. The adsorbing agent is high in adsorption efficiency of the heavy metal and the polycyclic aromatic hydrocarbon, and rapid in adsorption speed of the heavy metal and the polycyclic aromatic hydrocarbon.

Description

technical field [0001] The invention belongs to the technical field of water treatment materials, and in particular relates to a preparation process of an organic / inorganic composite adsorbent. Background technique [0002] Heavy metals and polycyclic aromatic hydrocarbons are two typical persistent pollutants in the environment, so the pollution control of heavy metals and polycyclic aromatic hydrocarbons is a research hotspot in the field of environmental engineering. The treatment of heavy metal and polycyclic aromatic hydrocarbon pollution usually adopts adsorption method. The adsorbents used in industry are mainly activated carbon and polymer adsorption resin. However, these two types of adsorbents are expensive and difficult to regenerate, which limits their application to a certain extent. In recent years, the development of low-cost and high-efficiency adsorbents has been a research hotspot in the field of wastewater treatment. However, the current research and devel...

Claims

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Application Information

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IPC IPC(8): B01J20/30B01J20/28C02F1/28
Inventor 陈芳艳唐玉斌叶伟
Owner JIANGSU UNIV OF SCI & TECH
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