Adsorbent for polyaromatic hydrocarbon pollutant, preparation method and application thereof

A technology for polycyclic aromatic hydrocarbons and pollutants, which is applied to water pollutants, chemical instruments and methods, and adsorption water/sewage treatment. It can solve the problems of high cost and difficult regeneration of adsorption materials, and achieve good water effluent effect and lipophilicity. The effect of increasing and increasing the number of lipophilic groups

Inactive Publication Date: 2010-06-09
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide an adsorbent for polycyclic aromatic hydrocarbon pollutants and its Preparation method and application

Method used

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  • Adsorbent for polyaromatic hydrocarbon pollutant, preparation method and application thereof
  • Adsorbent for polyaromatic hydrocarbon pollutant, preparation method and application thereof
  • Adsorbent for polyaromatic hydrocarbon pollutant, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Crush the natural peat through a 100-200 mesh sieve, weigh 10g of natural peat and add it to 1250ml NaOH solution with pH=12, stir at 500r / m for 20min, filter with suction, and wash with deionized water repeatedly until the pH of the cleaning water is ≈7. Dry at 80° C. for 10 h to obtain peat after alkali washing (alkali washing peat B). Take by weighing 5g of alkali-washed peat again, modify according to the ratio of peat: CTAB: water=1: 1: 250 (mass ratio), shake in a water bath at 55°C for 6h, and rotate at 150r / m. Wash with deionized water until no foam is generated, take it out and dry it at 80°C for 10 hours, grind and sieve to obtain alkali-washed modified peat (modified peat C). The modified peat prepared by the above steps is analyzed by SEM scanning electron microscope, and the photos obtained are shown in the attached description. figure 1 .

Embodiment 2

[0033]Crush the natural peat through a 100-200 mesh sieve, weigh 10g of natural peat and add it to 1250ml of NaOH solution with pH=12, stir at 500r / m for 20min, filter with suction, and wash with deionized water repeatedly until the pH of the cleaning water is ≈7 , and dried at 80°C for 10 hours to obtain peat after alkali washing. Then weigh 5g of alkali-washed peat, modify it according to the ratio of peat: CTAB: water=1: 1: 250 (mass ratio), oscillate in a water bath at 40°C for 6 hours, and rotate at 150r / m. After the reaction is completed, the solution is suction filtered and used Wash with deionized water until no foam is generated, take it out and dry it at 80°C for 10 hours, grind and sieve to obtain alkali-washed modified peat. The alkali-washed peat and modified peat worth the above steps are subjected to a static adsorption test at room temperature (25°C) to 50ml, 1mg / L phenanthrene solution. After 12h, the maximum adsorption capacity of natural peat is 0.75mg / g. T...

Embodiment 3

[0035] Dry and crush the natural rice straw through a 100-mesh sieve, weigh 20g of natural rice straw powder and add it to 1250ml of NaOH solution with pH = 12, stir at 500r / m for 30min, filter with suction, and wash with deionized water repeatedly until the pH of the washing water ≈ 7. Dry at 80°C for 10 hours to obtain alkali-washed straw. Then take 10g of alkali-washed rice straw, modify it according to the ratio of rice straw: tetrabutylammonium bromide (TBAB): water=1: 0.5: 250 (mass ratio), shake in a water bath at 80°C for 6h, and rotate at 150r / m. After the completion, filter the solution with suction, wash it with deionized water until no foam is generated, take it out and dry it at 80°C for 10 hours, grind it and sieve it to obtain the alkali-washed TBAB modified straw. The alkali-washed rice straw and modified rice straw worth the above steps are carried out static adsorption test at room temperature (25°C) to 100ml, 1mg / L phenanthrene solution. After 12h, the adsor...

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Abstract

The invention discloses a method for preparing an absorbent for a polyaromatic hydrocarbon pollutant. The method comprises the following step that: a biomass porous adsorption material and cationic surfactant are subjected to modification reaction, wherein a cationic surfactant comprises a quaternary ammonium cationic surfactant and a polymeric cationic surfactant, and is a cationic surfactant, of which the molecules carry C8-C24 alkyl, which can be dissolved in water, can generate ionization, and can remarkably affect wettability between solid and liquid. The invention also discloses the adsorbent for the polyaromatic hydrocarbon pollutant and application thereof. The adsorbent for the polyaromatic hydrocarbon pollutant can be used for polyaromatic hydrocarbon treatment of domestic sewage advanced treatment, and removal rate can be over 95 percent; and the preparation method has the advantages of wide raw material sources, low cost and simple process.

Description

technical field [0001] The invention specifically relates to an adsorbent for polycyclic aromatic hydrocarbon pollutants and its preparation method and application. Background technique [0002] Persistent organic pollutants such as polycyclic aromatic hydrocarbons (PAHs) are a class of compounds that are difficult to degrade naturally and have three effects. Most of them are highly toxic, have wide hazards, can persist in the environment, and belong to priority control pollutants. In addition to natural factors, persistent organic pollutants mainly come from human activities and energy utilization processes, such as the combustion of petroleum and coal, production of petroleum and petrochemical products, and spillage during offshore petroleum development and transportation. [0003] Polycyclic aromatic hydrocarbon pollutants have strong hydrophobicity and are difficult to be biodegraded, but they can dissolve in water in the presence of surfactants or a small amount of sol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/32
Inventor 周彦波汤烜祎徐燕晓赵庆陈艳华沈晓霞邵吉李杏彬鲁军
Owner EAST CHINA UNIV OF SCI & TECH
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