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

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

Active Publication Date: 2020-01-31
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 and its preparation method and application

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Experimental program
Comparison scheme
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 0.25mL 30% by mass of H 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 co...

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 0.4mL 30% by mass of H 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 solid-phase particle B; add B to a PBS buffer solution containing cysteine ​​protease, and react at room temperature for 4 hours to prepare an adsorbent;

[0084] Among them, the pH of Tris-HCl buffer solution is 8, FeCl 2 The solution concentration is 0.02mol / L, the pH of the PBS buffer solution is 7.6, and the concentration of cysteine ​​protease is 5g / 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-mentioned leaded water into the bottom of the glass tube, and flow out from the top. The lead con...

Embodiment 3

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

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

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

[0092] Take 0.2L of the above-mentioned leaded water and place it in a beaker, add 0.1g of adsorbent, pass air into it for aeration for 2 hours, filter and separate the adsorbent, the ...

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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 Patents(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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