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Dithizone grafted chelating gel, preparation method thereof and method for treating mercury-containing wastewater

A dithizone, chelating technology, applied in water/sewage treatment, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problem of unsatisfactory adsorption selectivity, and achieve enhanced adsorption selectivity and The effect of adsorption efficiency, efficient removal, and easy operation

Inactive Publication Date: 2014-05-21
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although its adsorption efficiency for heavy metal ions will increase, its adsorption selectivity is not very satisfactory.

Method used

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  • Dithizone grafted chelating gel, preparation method thereof and method for treating mercury-containing wastewater
  • Dithizone grafted chelating gel, preparation method thereof and method for treating mercury-containing wastewater
  • Dithizone grafted chelating gel, preparation method thereof and method for treating mercury-containing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 1.5 parts of polyacrylamide gel and dissolve it in 95.6 parts of distilled water, adjust the pH to 9 with a 10% NaOH solution, transfer it into a three-necked flask equipped with a condenser tube and a dropping funnel, and add to the three-necked flask Add 2.8 parts of formaldehyde solution to the bottle, then dropwise add 0.1 part of 2g / L dithizone solution to the bottle, react in a water bath at 24°C for 120min, separate the product, and dry to obtain dithizone grafted chelate gel.

Embodiment 2

[0026] Weigh 2.0 parts of polyacrylamide gel, dissolve and mix it in 94.5 parts of distilled water, adjust the pH to 9 with a pH regulator 10% NaOH solution, and transfer it into a three-necked flask equipped with a condenser and a dropping funnel. Add 3.4 parts of formaldehyde solution to the above system, and then dropwise add 0.1 part of 2g / L dithizone solution to the bottle, react in a water bath at 36°C for 120min, separate the product, and dry it to obtain dithizone. Branch chelating gel.

Embodiment 3

[0028] Weigh 1.0 part of polyacrylamide gel, dissolve and mix it in 96.8 parts of distilled water, adjust the pH to 9 with a pH regulator 10% NaOH solution, and transfer it into a three-neck flask equipped with a condenser and a dropping funnel. Add 2.0 parts of formaldehyde solution to the above system, and then dropwise add 0.2 parts of 2g / L dithizone solution to the bottle, react in a water bath at 24°C for 180min, separate the product, and dry it to obtain dithizone. Branch chelating gel.

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Abstract

The invention discloses dithizone grafted chelating gel which is prepared from the following raw materials in parts by weight: 1.0-2.0 parts of polyacrylamide gel, 2.0-3.5 parts of formaldehyde, 0.1-0.2 part of dithizone solution and 94.5-96.8 parts of distilled water. The method for preparing the dithizone grafted chelating gel comprises the following steps: adding the polyacrylamide gel in a formula amount into the distilled water with a formula amount, so that the polyacrylamide gel is dissolved to obtain a solution, and regulating the pH of the solution to be 9-11; adding the formaldehyde with a formula amount into the solution, dripping the dithizone solution with a formula amount into a bottle in a drip-by-drip mode, reacting at the temperature of 24-36 DEG C for 120-180 minutes, separating a product, and drying, so as to obtain the dithizone grafted chelating gel. The method is simple and feasible, and the prepared dithizone grafted chelating gel has the high adsorption property on heavy metal pollution ions and has a rapid high-efficiency mercury removal effect on the heavy metal wastewater.

Description

technical field [0001] The invention belongs to the technical field of environmental protection functional materials for environmental engineering, and specifically relates to a dithizone grafted chelating gel, a preparation method and a method for treating mercury-containing wastewater, which can also be used for the treatment of other industrial wastewater containing heavy metals . Background technique [0002] With the increasing degree and scope of heavy metal pollution in water in China, the harmless and efficient treatment technology of heavy metal polluted water has become a hot research and exploration direction. At present, the treatment methods of mercury-containing wastewater mainly include biological method, precipitation method, adsorption method and so on. The microorganisms used in the biological method are easily poisoned, and the treatment capacity needs to be improved; in practical applications, the precipitation method is widely used because of its simple...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30B01J13/00C02F1/28C02F1/62C08F20/56C08F8/34
Inventor 李宇亮彭悦欣滕艳敏赵英杰郑锦男
Owner CHANGAN UNIV
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