Preparation method and application of environment-friendly, efficient and low-cost polyamino-carboxyl crosslinked straw fiber adsorbent material

A technology for adsorbing materials and straw fibers, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve problems such as small specific surface area and pore volume, and achieve large adsorption capacity, good adsorption effect, and cost. low cost effect

Inactive Publication Date: 2020-01-14
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] This technology focuses on the development and utilization of low-cost, environmentally friendly agricultural waste corn stalk biomass materials, and overcomes the shortcomings of its small specific surface area and pore volume by introducing a large number of amino and carboxyl modification methods, as well as making up for the biomaterials developed by most researchers. Material materials are often only effective for one kind of pollutants, so a modified corn stalk fiber biomass material with good adsorption effect on heavy metals and antibiotics has been developed, and it is cheap, easy to operate, The material has the advantages of high stability and reusability

Method used

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  • Preparation method and application of environment-friendly, efficient and low-cost polyamino-carboxyl crosslinked straw fiber adsorbent material
  • Preparation method and application of environment-friendly, efficient and low-cost polyamino-carboxyl crosslinked straw fiber adsorbent material
  • Preparation method and application of environment-friendly, efficient and low-cost polyamino-carboxyl crosslinked straw fiber adsorbent material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0045] Single adsorption capacity of modified materials to SMZ and Cd at different concentrations at different pH

[0046] Select pH3, pH5.8, and pH8. When single adsorption, the five concentrations of SMZ are 1mg / L, 3mg / L, 5mg / L, 8mg / L, and 10mg / L. The five concentrations of Cd are 2mg / L, 6mg / L, 10mg / L, 15mg / L, 20mg / L. Weigh 0.02g of the modified material into a 50ml Erlenmeyer flask respectively, the dosage of SMZ and Cd is 20ml, then seal it and put it into a constant temperature shaking shaker, set the temperature at 25°C, and the speed of the shaker at 180r / min, SMZ adsorption The equilibrium time was 40h, and the Cd adsorption equilibrium time was 4h. Three groups of parallel samples were set for each concentration. Subsequently, the balanced solution was taken out, and its concentration was measured by high performance liquid chromatography and atomic absorption spectrophotometer respectively.

[0047] Among them, the single adsorption capacity of polyamino and carbox...

Embodiment 3

[0050] The adsorption capacity of modified materials for Cd at different concentrations under the condition of different pH and the presence of SMZ at the same time

[0051] Choose pH3, pH5.8, pH8 three kinds of situations, weigh 0.02g of the modified material in a 50ml Erlenmeyer flask, prepare a series of mixed solutions of SMZ and Cd with different concentration ratios, wherein the concentration of Cd is 20mg / L, the concentration of SMZ is 5 The concentrations were 1mg / L, 4mg / L, 6mg / L, 8mg / L, and 10mg / L, respectively. The dosage of the mixed solution of SMZ and Cd was 20ml, the temperature of the constant temperature shaking shaker was set at 25°C, the rotation speed was 180r / min, the adsorption equilibrium time of the mixed solution was 40h, and three sets of parallel samples were set for each concentration. Then the balanced solution was taken out, and its concentration was determined by atomic absorption spectrophotometer and high performance liquid chromatography.

[0...

Embodiment 4

[0055] The adsorption capacity of modified materials to SMZ at different concentrations under the condition of different pH and the presence of Cd at the same time

[0056] Select pH 3, pH 5.8, and pH 8, weigh 0.02g of the modified material in a 50ml Erlenmeyer flask, and prepare a series of mixed solutions of SMZ and Cd with different concentration ratios, wherein the concentration of SMZ is 20mg / L, and the concentration of Cd is 5 The concentrations were 2mg / L, 8mg / L, 10mg / L, 15mg / L, and 20mg / L, respectively. The dosage of the mixed solution of SMZ and Cd was 20ml, the temperature of the constant temperature shaking shaker was set at 25°C, the rotation speed was 180r / min, the adsorption equilibrium time of the mixed solution was 40h, and three sets of parallel samples were set for each concentration. Then the balanced solution was taken out, and its concentration was determined by atomic absorption spectrophotometer and high performance liquid chromatography.

[0057] Among...

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Abstract

The invention discloses a preparation method and application of an environment-friendly, efficient and low-cost polyamino-carboxyl crosslinked straw fiber adsorbent material, and relates to the fieldsof preparation and application of biomass adsorbent materials. The polyamino-carboxyl crosslinked straw fiber adsorbent material is obtained through multiple times of cross-linking of diethylenetriamine, epichlorohydrin and nitrilotriacetic acid. It is shown through FTIR spectrograms that amino groups and carboxyl groups are introduced successfully, and the adsorbent material has good adsorptionperformance for a single system or mixed system of Cd and SMZ.

Description

technical field [0001] The invention relates to the field of preparation and application of fiber adsorption materials, in particular to a preparation method of polyamino-carboxyl cross-linked straw fiber adsorption materials and its application to the adsorption of compound pollution of antibiotics and heavy metals. Background technique [0002] In recent years, antibiotics have been widely used in animal husbandry and human medicine because of their advantages such as broad antibacterial spectrum, stable properties, and simple use, and have been frequently detected in natural water bodies. As a new type of pollutant, antibiotics will increase the resistance of bacteria and even produce resistance genes after being discharged into water bodies, thereby affecting the normal life activities of microorganisms, animals and plants, and ultimately endangering human health. As a common pollutant, heavy metals are widely derived from human activities, such as mining, electroplating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/20C02F101/38
CPCB01J20/267B01J2220/4812B01J2220/4825C02F1/285C02F1/286C02F2101/20C02F2101/38C02F2101/40
Inventor 郑刘春张涛余华俭张世平任静静
Owner SOUTH CHINA NORMAL UNIVERSITY
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