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A kind of preparation method and application of high-efficiency sulfate ion adsorption material

A sulfate ion and adsorption material technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as poor adsorption effect, achieve good adsorption performance, and be environmentally friendly Effects on sexuality and biocompatibility

Inactive Publication Date: 2011-11-30
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Modified chitosan materials have little research on some inorganic anions. Most of the methods used are to protonize chitosan after cross-linking, and use electrostatic attraction to carry out anions, and the adsorption effect is poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0018] A method for preparing an efficient sulfate ion adsorption material, specifically comprising the following steps:

[0019] The first step is to dissolve 0.1g chitosan in 50ml of acetic acid solution with a mass concentration of 5%, swell for 40min, heat up to 60°C, add 100ml of liquid paraffin, stir for 10min, add dropwise 1ml of sorbitan monooleate, Emulsify for 10 minutes, add dropwise 1ml of formaldehyde solution with a mass concentration of 40%, react for 1 hour, then add dropwise 1ml of benzaldehyde solution with a mass concentration of 98%, react, adjust the pH of the system to 7, react for 30min, filter, and wash with water until neutral , using petroleum ether at 70 °C, reflux extraction in a Soxhlet extractor for 24 hours to extract and remove residual organic matter, and then vacuum-dry to constant weight to obtain formaldehyde-benzaldehyde ternary cross-linked chitosan;

[0020] In the second step, the above-mentioned formaldehyde-benzaldehyde ternary cross-l...

preparation Embodiment 2

[0022] A method for preparing an efficient sulfate ion adsorption material, specifically comprising the following steps:

[0023] The first step is to dissolve 5g of chitosan in 150ml of acetic acid solution with a mass concentration of 1%, swell for 40min, heat up to 60°C, add 300ml of liquid paraffin, stir for 10min, add 10ml of sorbitan monooleate dropwise, and emulsify 10min, add dropwise 20ml of formaldehyde solution with a mass concentration of 35%, react for 1h, then dropwise add 20ml of benzaldehyde solution with a mass concentration of 80%, react, adjust the pH of the system to 14, react for 30min, filter, wash with water until neutral, Using petroleum ether at 70°C, reflux extraction in a Soxhlet extractor for 24 hours to extract and remove residual organic matter, and then vacuum-dry to constant weight to obtain formaldehyde-benzaldehyde ternary cross-linked chitosan;

[0024] In the second step, the above-mentioned formaldehyde-benzaldehyde ternary cross-linked chi...

preparation Embodiment 3

[0026] A method for preparing an efficient sulfate ion adsorption material, specifically comprising the following steps:

[0027] The first step is to dissolve 3g of chitosan in 100ml of acetic acid solution with a mass concentration of 3%, swell for 40min, heat up to 60°C, add 200ml of liquid paraffin, stir for 10min, add dropwise 5ml of sorbitan monooleate solution, Emulsify for 10 minutes, add dropwise 10ml of formaldehyde solution with a mass concentration of 36.5%, react for 1 hour, then add dropwise 12ml of benzaldehyde solution with a mass concentration of 90%, react, adjust the pH of the system to 9, react for 30min, filter, wash with water until neutral , using petroleum ether at 70 °C, reflux extraction in a Soxhlet extractor for 24 hours to extract and remove residual organic matter, and then vacuum-dry to constant weight to obtain formaldehyde-benzaldehyde ternary cross-linked chitosan;

[0028] In the second step, the above-mentioned formaldehyde-benzaldehyde tern...

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Abstract

The invention discloses a preparation method and application for a high-efficiency sulfate ion adsorbing material. The preparation method mainly comprises the following steps of: 1, performing crosslinking modification on natural polymer polysaccharide chitosan to prepare ternary cross-linked chitosan, and performing loading modification on the modified chitosan resin to prepare ternary cross-linked and loaded chitosan. The material is used for adsorbing the sulfate ions and has a good adsorption effect; and the material has the characteristics of degradability, biocompatibility and environment-friendliness of natural chitosan and is a novel adsorption material which has development potential.

Description

technical field [0001] The invention relates to a wastewater treatment process, in particular to the treatment of sulfate ions in wastewater, in particular to a preparation method and application of a high-efficiency sulfate ion adsorption material. Background technique [0002] Sulfate ions exist in surface water, groundwater, or in chlor-alkali enterprise processes, ore dressing and metallurgy industries, which cause a certain degree of harm to the production process, and at the same time cause certain pollution to the surrounding environment and endanger human health. At present, the methods for removing sulfate radicals in wastewater mainly include chemical precipitation, membrane separation, neutralization recovery, biological method and adsorption method. Among them, the chemical precipitation method uses a large amount of chemicals such as barium chloride and calcium chloride, which itself will cause environmental pollution; the membrane separation method is easily af...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F1/58
Inventor 薛娟琴郭莹娟毕强李国平毛维博洪涛
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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