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Organic-inorganic hybrid adsorbent with hierarchical structure, preparation method and application thereof

A hierarchical structure, adsorbent technology, applied in inorganic chemistry, chemical instruments and methods, adsorbed water/sewage treatment, etc., can solve the problems of loss, easy agglomeration, difficult separation, etc.

Active Publication Date: 2018-12-21
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0020] Based on this, it is necessary to provide an organic-inorganic hybrid adsorbent with a hierarchical structure and its preparation for the existing powder nano-adsorbents that are easy to agglomerate and lose when treating heavy metal-containing wastewater, and are difficult to separate from the treated water. Methods and Applications

Method used

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  • Organic-inorganic hybrid adsorbent with hierarchical structure, preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0077] Add 1.0 g macroporous cation exchange resin to 0.1 L Tris-HCl buffer solution, 0.2 g of (HO) 2 C 6 h 3 CH 2 CH 2 NH 2 · HCl, 0.1 g CuSO 4 ·5H 2 O and 0.25 mL 30% HO 2 o 2 , react in the dark at room temperature for 40 minutes, filter out solid phase particles A; add A to FeSO 4 In the solution, react at room temperature for 4 hours, and filter out solid-phase particle B; add B to a PBS buffer solution containing cysteine ​​protease, and react at room temperature for 6 hours to prepare an adsorbent;

[0078] Among them, the pH of Tris-HCl buffer solution is 9, FeSO 4 The solution concentration is 0.2mol / L, the pH of the PBS buffer solution is 7.2, and the concentration of cysteine ​​protease is 1g / L.

[0079] The lead concentration in lead-containing water is 200mg / L;

[0080] Get above-mentioned leaded water 0.5L and place in the beaker, add 0.5g adsorbent, after stirring and reacting for 6 hours, filter and separate the adsorbent, record the lead concentrati...

Embodiment 2

[0083] Add 0.5 g macroporous cation exchange resin to 0.1 L Tris-HCl buffer solution, 0.3 g of (HO) 2 C 6 h 3 CH 2 CH 2 NH 2 · HCl, 0.2 g CuSO 4 ·5H 2 O and 0.4 mL 30% HO 2 o 2 , react in the dark at room temperature for 30 minutes, filter out solid phase particles A; add A to FeCl 2In the solution, react at room temperature for 2 hours, and filter out the solid-phase particles B; add B to the PBS buffer solution containing cysteine ​​protease, and react at room temperature for 4 hours to prepare the adsorbent;

[0084] Among them, the pH of Tris-HCl buffer solution is 8, FeCl 2 The concentration of the solution was 0.02 mol / L, the pH of the PBS buffer solution was 7.6, and the concentration of cysteine ​​protease was 5 g / L.

[0085] The lead concentration in lead-containing water is 1mg / L;

[0086] Take 0.06g of adsorbent and add it into a Φ8mm glass tube, pass 0.2L of the above lead-containing water from the bottom of the glass tube, and flow out from the top, and...

Embodiment 3

[0089] To 0.1L Tris-HCl buffer solution, add 1.5g macroporous cation exchange resin, 0.25g (HO) 2 C 6 H 3 CH 2 CH 2 NH 2 HCl, 0.15g CuSO 4 ·5H 2 O and 0.3 mL of 30% H 2 O 2 , react in the dark for 38 minutes at room temperature, filter out solid phase particle A; add A to FeSO 4 In the solution, react at room temperature for 3.5 hours, and filter out the solid-phase particles B; add B to the PBS buffer solution containing cysteine ​​protease, and react at room temperature for 5 hours to prepare the adsorbent;

[0090] Among them, the pH of Tris-HCl buffer solution is 8.6, FeSO 4 The concentration of the solution was 0.16 mol / L, the pH of the PBS buffer solution was 7.4, and the concentration of cysteine ​​protease was 0.5 g / L.

[0091] The lead concentration in lead-containing water is 50mg / L;

[0092] Take 0.2L of the above-mentioned lead-containing water and place it in a beaker, add 0.1g of adsorbent, and after aeration with air for 2 hours, filter and separate o...

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Abstract

The invention relates to an organic-inorganic hybrid adsorbent with a hierarchical structure, a preparation method and application thereof. The preparation method comprises the steps of adding ion exchange resin, dopamine, copper sulfate and hydrogen peroxide into a Tris-HCl buffer solution, performing dark reaction at room temperature, separating the ion exchange resin having an adhesive polydopamine on the surface, then adding the resin into a ferrous salt solution, reacting at room temperature, separating the ion exchange resin carrying ion, adding thiol protease and the ion exchange resincarrying ion into a PBS buffer solution, reacting at room temperature, separating and naturally drying the solid material, thus obtaining the organic-inorganic hybrid adsorbent with a hierarchical structure. The prepared adsorbent can efficiently adsorb lead ions in water, solves the problem that the conventional powder nano-adsorbent is easy to agglomerate and lose and difficult to separate fromthe treated water body when lead-containing wastewater is treated, and is suitable for treating heavy metal sewage.

Description

technical field [0001] The invention relates to the technical field of heavy metal sewage treatment, in particular to an organic-inorganic hybrid adsorbent with a hierarchical structure and a preparation method thereof. Background technique [0002] With the rapid growth of our country's economy, especially the concentrated development of industries such as mining and metallurgy, machinery, electroplating, printing and dyeing within a certain period of time, the problem of heavy metal pollution in the environment, especially in water bodies, has been paid more and more attention. Because heavy metals such as mercury, lead, and cadmium have strong biological toxicity, heavy metal pollution in water can cause great harm to the ecological environment of water bodies; and the physical and chemical properties of heavy metal ions are similar to those of iron, calcium, potassium, and sodium in living organisms, and they are easy to release It accumulates in the body and finally ent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28C02F1/28C02F1/42C02F1/52C02F1/56C02F101/20
CPCB01J20/0229B01J20/265B01J20/28004B01J20/28019C02F1/281C02F1/285C02F1/42C02F1/5236C02F1/56C02F2001/425C02F2101/20
Inventor 孙奇娜崔悦张庆瑞陈龑斐刘欣超贾清川韩梦星
Owner YANSHAN UNIV
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