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Preparation method of modified pollen and application thereof for absorbing and treating EDCs of water

A pollen and modification technology, which is applied in the fields of adsorption water/sewage treatment, chemical instruments and methods, and other chemical processes, can solve the problems of high cost, few surface functional groups, secondary pollution, etc., and achieves low cost and high adsorption. , a wide range of effects

Inactive Publication Date: 2013-08-14
云南中绿文德生态环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the key to the adsorption method is to select a low-cost and high-efficiency adsorbent. Although the currently used adsorbents such as activated carbon and macroporous resin have good adsorption effects, they are expensive, difficult to regenerate, and secondary Pollution and other factors affect its promotion and use
[0006] Studies have shown that the unique structure of biomass materials, containing organic matter and functional groups make them have the potential to adsorb pollutants, but at the same time, biosorbent materials have limited adsorption performance, poor adsorption and settlement, and few surface functional groups. In order to give full play to the advantages of biomass materials, To become a good adsorption material, it is necessary to make up for its shortcomings and modify it
However, there is no report on the use of pollen or modified pollen in the adsorption treatment of EDCs in water systems.

Method used

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  • Preparation method of modified pollen and application thereof for absorbing and treating EDCs of water
  • Preparation method of modified pollen and application thereof for absorbing and treating EDCs of water
  • Preparation method of modified pollen and application thereof for absorbing and treating EDCs of water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0144] Add 20g of natural lotus pollen to 200mL of absolute ethanol, and put it into ultrasonic washing to remove impurities contained in the pollen. After solid-liquid separation, pour off the ethanol solution in the upper layer, put it into a drying oven and dry it completely at 60°C. Grind the dried lotus pollen into small particles with a pulverizer, take 10 g through an 80-mesh sieve and add it to 200 mL of concentrated hydrochloric acid, disperse ultrasonically for 20 min, then reflux for 7 h, filter with a Buchner funnel, wash with ultrapure water until neutral , placed in an oven to dry at 60°C, and the obtained powder is the modified lotus pollen adsorbent.

[0145] Take 10mg of modified lotus pollen adsorbent and add to the concentration of target pollutant BPA to 10mg L -1 In the solution, shake at 25°C and 200rpm for 8h to carry out the adsorption experiment. The removal rate of BPA reached 41.4% after shaking adsorption.

Embodiment 2

[0147] Add 20g of natural lotus pollen to 250mL of absolute ethanol, put it into ultrasonic washing to remove impurities contained in the pollen. After solid-liquid separation, pour off the ethanol solution in the upper layer, put it into a drying oven and dry it completely at 60°C. Grind the dried lotus pollen into small particles with a pulverizer, take 10 g through a 80-mesh sieve and add it to 300 mL of concentrated hydrochloric acid, disperse ultrasonically for 15 minutes, and then reflux for 9 hours. After washing to neutrality, put it into an oven and dry at 60°C, and the obtained powder is the modified lotus pollen adsorbent.

[0148] Add 10 mg of modified lotus pollen adsorbent to the target pollutant BPA concentration of 10 mg L -1 In the solution, shake at 25°C and 200rpm for 8h to carry out the adsorption experiment. The removal rate of BPA reached 45.5% after shaking adsorption.

Embodiment 3

[0150] 20g of natural apricot flower pollen was added to 400mL of absolute ethanol, and put into ultrasonic washing to remove impurities contained in the pollen. After solid-liquid separation, pour off the ethanol solution in the upper layer, put it into a drying oven and dry it completely at 60°C. The dried apricot flower pollen is crushed into small particles with a pulverizer, and passed through a 80-mesh sieve for later use. Take 10g of washed apricot flower pollen and add it to 400mL concentrated hydrochloric acid for ultrasonic dispersion for 2min, reflux for 9h, filter the refluxed product with a Buchner funnel, wash with ultrapure water until neutral, put it in an oven at 80°C and dry it to obtain a powder It is the modified apricot flower pollen adsorbent.

[0151] Add 10 mg of modified apricot flower pollen adsorbent to the target pollutant BPA concentration of 10 mg L -1 in solution. Adsorption experiments were carried out in a shaker at 25°C and 200rpm for 8h. ...

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Abstract

The invention discloses a preparation method of modified pollen and the application thereof for absorbing and treating EDCs of water, which belong to a treatment method for sewage or wastewater. The preparation method disclosed by the invention comprises the following steps: washing natural pollen with ethanol; carrying out solid-liquid separation, drying and crushing; and adding the crushed product into a concentrated hydrochloric acid, sequentially carrying out ultrasonic dispersion and backflow filtering, washing to neutral, and drying, wherein the natural pollen is lotus pollen, piny flower pollen, apricot flower pollen and dandelion pollen. According to the application of the modified pollen for treating EDCs of waer, the modified pollen is added into water containing pollutants such as bisphenol A, estrone, 17beta-estradiol, estriol, progesterone, 17-alpha-ethinyl estradiol, 4-n-nonyl phenol, 4-t-octyl phenol, diethylstilbestrol or tetrabromobisphenol A. The pollen disclosed by the invention is small in polarity, hydrophobic, high in adsorbent active site and saturated adsorption amount, small in desorption ratio, renewable and reusable, therefore, the application is a way of treating water pollutions by using biomass materials.

Description

technical field [0001] The invention belongs to a treatment method for sewage or waste water, and in particular relates to the preparation and application of adsorption materials for removing environmental endocrine disruptors (Endocrine Disruption Chemicals, namely EDCs) in water bodies. Background technique [0002] Environmental endocrine disruptors exist widely in human life, and can be divided into two types: naturally occurring and artificially synthesized. The former is a hormone normally secreted by the human body or animal body, and enters the environment through excrement discharged into sewage or sludge; the latter is too numerous to mention, such as industrial wastewater, waste residue, chemical agents, pesticides, fertilizers, plant growth regulators and Feed additives, detergents, disinfectants, plastic products, domestic wastewater, waste incineration, automobile exhaust, steroids and contraceptives, etc. EDCs are difficult to degrade in the environment and c...

Claims

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Application Information

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IPC IPC(8): C02F1/28B01J20/30B01J20/22
Inventor 蒋峰芝张琦刘拥军肖明王亚龙
Owner 云南中绿文德生态环保科技股份有限公司
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