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Heavy metal adsorbent and preparation method thereof

A technology of heavy metals and adsorbents, applied in the directions of alkali metal compounds, chemical instruments and methods, adsorbed water/sewage treatment, etc., can solve the problems of difficult to remove complexes, etc., and achieve the effect of simple synthesis method and strong adsorption capacity

Inactive Publication Date: 2017-11-24
JIANGSU HELPER FUNCTIONAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nitrogen atom on the pyridyl group, secondary amino group or tertiary amino group forms a chelation structure with heavy metal ions, so as to achieve the purpose of adsorption and separation. This material has a certain removal effect on the complexes formed by general chelating agents and metals, but it is difficult to Remove complexes formed by EDTA, a strong chelating agent

Method used

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  • Heavy metal adsorbent and preparation method thereof
  • Heavy metal adsorbent and preparation method thereof
  • Heavy metal adsorbent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Add 500ml of deionized water, 3.0g of gelatin, and 2.5g of methylcellulose into a 2000ml flask equipped with a stirring and temperature control device, and stir until dissolved to obtain an aqueous phase. Prepare 500 g of oil phase, including 40 g of styrene, 20 g of allyl itaconate, 40 g of allyl tripolyisocyanate, 100 g of divinylbenzene, 200 g of heptanol, and 100 g of ethyl acetate. In addition, 0.5 g of benzoyl peroxide and 1 g of azobisisobutyronitrile were added to the oil phase, mixed uniformly, and then added to the above water phase. Adjust the rotation speed until the oil phase is dispersed in the water phase to form a suitable particle size, then raise the temperature to 65°C, keep it warm for 12 hours, cool, wash with water, and dry to obtain polystyrene resin white balls.

[0036] Take 20ml of polystyrene resin white balls, 240ml of water, and 5ml of benzylamine, add them into a 500ml flask, stir at 30°C for 18h, wash with water and dry to obtain aminated ...

Embodiment 2

[0041] Add 500 ml of deionized water, 5.0 g of gelatin, and 5.0 g of methylcellulose into a 2000 ml flask equipped with a stirring and temperature control device, and stir until dissolved to obtain an aqueous phase. Prepare 600g of oil phase, including 70g of styrene, 40g of allyl itaconate, 40g of allyl tripolyisocyanate, 200g of divinylbenzene, 200g of heptanol, and 50g of ethyl acetate. In addition, 1 g of benzoyl peroxide and 1.5 g of azobisisobutyronitrile were added to the oil phase, mixed uniformly, and then added to the above water phase. Adjust the rotational speed until the oil phase disperses into a suitable particle size in the water phase, then raise the temperature to 75°C, keep it warm for 16 hours, cool, wash with water, and dry to obtain polystyrene resin white balls.

[0042] Add 20ml of polystyrene resin white balls, 210ml of water, and 5.25ml of benzylamine into a 500ml flask, stir at 40°C for 16h, wash with water and dry to obtain aminated resin microspher...

Embodiment 3

[0047] Add 500 ml of deionized water, 4.0 g of gelatin, and 3.0 g of methylcellulose into a 2000 ml flask equipped with a stirring and temperature control device, and stir until dissolved to obtain an aqueous phase. Prepare 500 g of oil phase, including 50 g of styrene, 40 g of allyl itaconate, 10 g of allyl tripolyisocyanate, 100 g of divinylbenzene, 100 g of heptanol, and 200 g of ethyl acetate. In addition, 1.5 g of benzoyl peroxide and 1 g of azobisisobutyronitrile were added to the oil phase, mixed uniformly, and then added to the above-mentioned flask. Adjust the rotation speed until the oil phase is dispersed in the water phase to form a suitable particle size, then raise the temperature to 80°C, keep it warm for 18 hours, cool, wash with water, and dry to obtain polystyrene resin white balls.

[0048]Add 10ml of polystyrene resin white balls, 150ml of water, and 3ml of benzylamine into a 500ml flask, stir at 30°C for 24h, wash with water and dry to obtain aminated resi...

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Abstract

The invention relates to a preparation method of a heavy metal adsorbent. The preparation method comprises the following steps: uniformly mixing polystyrene microspheres with benzylamine in water to react at 20-40 DEG C, so as to obtain aminated resin microspheres; and uniformly mixing the aminated resin microspheres, water and dioxahexane to obtain a mixed solution, adjusting the pH value of the mixed solution to 10-11, and adding carbon disulfide to react at 20-40 DEG C, so as to obtain the heavy metal adsorbent. The invention further provides the heavy metal adsorbent prepared by virtue of the preparation method. The structural formula of the heavy metal adsorbent is as shown in the description, wherein R represents phenyl, methyl or hydrogen, and n is equal to 1000-4000. According to the heavy metal adsorbent, a sulfur atom in a dithiocarboxyl group serves as a coordination atom and forms a multi-tooth chelating center of heavy metals.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a heavy metal adsorbent and a preparation method thereof. Background technique [0002] Heavy metal pollution is one of the most harmful water pollution problems. Heavy metals enter water bodies through man-made pollution sources such as mining, metal smelting, metal processing and chemical production wastewater, fossil fuel combustion, application of pesticides and fertilizers, and domestic garbage, as well as natural sources such as geological erosion and weathering. Heavy metals are highly toxic, difficult to be metabolized in the environment, easy to be enriched by organisms, and have biomagnification effects. They not only pollute the water environment, but also seriously threaten the survival of humans and aquatic organisms. At present, people have relatively in-depth research on the problem of heavy metal pollution in water, and have adopted a variety of methods to treat an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F1/62C08F212/36C08F212/08C08F222/26C08F226/06
CPCB01J20/265B01J20/28021C02F1/285C02F2101/20C02F2101/22C08F212/36C08F212/08C08F222/26C08F226/06
Inventor 蔡建国石洪雁付晓微
Owner JIANGSU HELPER FUNCTIONAL MATERIALS
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