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Multifunctional composite adsorbent, and preparation method and application thereof

A composite adsorption, multi-functional technology, applied in chemical instruments and methods, adsorption water/sewage treatment, alkali metal compounds, etc., can solve problems such as the enhancement of polluting components, and achieve the effects of large adsorption capacity, simple operation, and convenient recovery.

Inactive Publication Date: 2012-02-15
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the diversity and complexity of polluting components in wastewater are increasing day by day, and single-function adsorbents can no longer meet the needs of wastewater treatment by adsorption. Two or more functional materials are combined to make their functions complementary, improved and optimized, and developed It is an important research direction for the current adsorption method to treat wastewater to develop a multifunctional adsorbent with specific and selective removal ability for various pollutant components in wastewater.

Method used

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  • Multifunctional composite adsorbent, and preparation method and application thereof
  • Multifunctional composite adsorbent, and preparation method and application thereof
  • Multifunctional composite adsorbent, and preparation method and application thereof

Examples

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Embodiment 1

[0033] a kind of like figure 1 The multifunctional composite adsorbent of the present invention shown, this multifunctional composite adsorbent is based on cross-linked chitosan, and cross-linked chitosan is made of heavy metal cadmium ion imprinted chitosan cross-linked by cross-linking agent glutaraldehyde. Formed after linking, the cross-linked chitosan matrix is ​​filled with nano-Fe 3 o 4 and nano TiO 2 , the surface of the multifunctional composite adsorbent is modified by thiourea to form a large number of free amino groups.

[0034] A preparation method of the above-mentioned multifunctional composite adsorbent, comprising the following steps:

[0035] (1) Photocatalytic loading: Weigh 5.0g chitosan powder and add it to 200ml acetic acid solution with a concentration of 2.5%, ultrasonically disperse and dissolve, and add 2.0g nano-TiO 2 powder and 2.5g nano Fe 3 o 4 Powder, mechanically stirred to form a uniform emulsified mixture;

[0036] (2) Ion imprinting: A...

Embodiment 2

[0040] Embodiment 2: the application of adsorbent in the treatment of composite wastewater

[0041] (1) Different pH values

[0042] The composite wastewater containing cadmium and 2,4-dichlorophenol under different pH value conditions is processed by utilizing the multifunctional composite adsorbent obtained in Example 1, comprising the following steps:

[0043] Choose the composite waste water that the initial concentration of cadmium is 100mg / L and the initial concentration of 2,4-dichlorophenol is 10mg / L, with NaOH (or HNO 3 ) adjust the pH value of the composite wastewater, and prepare nine samples of the composite wastewater to be treated with pH values ​​ranging from 2 to 8, and add the multifunctional composite adsorbent prepared in Example 1 to the nine samples of the composite wastewater to be treated respectively. In, under the temperature condition of 25 ℃, put in the shaker and shake and react for 6h (the shaker speed is 120rpm), after the reaction is completed, ...

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Abstract

The invention discloses a multifunctional composite adsorbent. Cross-linked chitosan is used as a matrix and is formed by cross-linking heavy metal ion imprinting chitosan by using a cross-linking agent; the cross-linked chitosan matrix is filled with nano Fe3O4 and nano TiO2; and the surface of the multifunctional composite adsorbent is modified by thiocarbamide so as to form a large amount of free amino groups. The invention correspondingly discloses a preparation method for the multifunctional composite adsorbent. The preparation method comprises the following steps of: performing photocatalysis loading, performing heavy metal ion imprinting to ensure the metal imprinting ions are fully reacted with chitosan in the heavy metal imprinting ions to form complexes, and adding the cross-linking agent and reacting; and adding epichlorohydrin and an acetone solution containing thiocarbamide, and modifying and grafting, finally oscillating and desorbing, and regenerating by using an alkaline solution to prepare the multifunctional composite adsorbent. By using the multifunctional composite adsorbent, heavy metal can be selectively separated and / or organic pollutants can be degraded.

Description

technical field [0001] The invention relates to the field of waste water treatment, in particular to a multifunctional composite adsorbent, a preparation method of the adsorbent and an application of the adsorbent in treating waste water. Background technique [0002] At present, the harm of combined pollution of heavy metals and organic pollutants in the environment has become a global problem. These waste waters from industries such as electroplating, metallurgy, dyes, battery production, tanning, film manufacturing, and automobile manufacturing are polluted by heavy metals and toxic organic pollutants. Due to their high toxicity and persistence in the natural environment, they are harmful to humans and animals. The growth and development of plants are seriously endangered. Heavy metals and their coexisting organic pollutants usually pollute lakes, groundwater, rivers, and soil; in addition, the toxicity of the complex pollution system formed by heavy metals and organic p...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30B01J20/28B01J23/745C02F1/28C02F1/30C02F1/72C02F101/20C02F101/22C02F101/34C02F101/36
Inventor 陈安伟曾光明陈桂秋胡新将官嵩尚翠邹正军
Owner HUNAN UNIV
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