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Dithizone grafted chelating gel, preparation method 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 economical feeding

Inactive Publication Date: 2016-03-09
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 and method for treating mercury-containing wastewater
  • Dithizone grafted chelating gel, preparation method and method for treating mercury-containing wastewater
  • Dithizone grafted chelating gel, preparation method 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 by mass, transfer it into a three-necked flask equipped with a condenser tube and a dropping funnel, and add to the three-necked flask. 2.8 parts of formaldehyde solution was added into the bottle, and then 0.1 part of 2g / L dithizone solution was added dropwise to the bottle, and the reaction was carried out in a water bath at 24°C for 120 min. The products were separated and dried to obtain dithizone graft chelation. 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 adjuster 10% NaOH solution, and transfer it into a three-necked bottle equipped with a condenser tube and a dropping funnel. Add 3.4 parts of formaldehyde solution to the above system, then dropwise add 0.1 part of 2g / L dithizone solution to the bottle, react under 36 ℃ water bath conditions for 120min, separate the product, and dry to obtain the dithizone connection. Branch chelating gel.

Embodiment 3

[0028] Weigh 1.0 parts of polyacrylamide gel, dissolve and mix it in 96.8 parts of distilled water, adjust the pH to 9 with a pH adjuster 10% NaOH solution, and transfer it into a three-necked bottle equipped with a condenser tube and a dropping funnel. Add 2.0 parts of formaldehyde solution to the above system, then dropwise add 0.2 parts of 2g / L dithizone solution to the bottle, react under 24 ℃ water bath conditions for 180min, separate the product, and dry to obtain the dithizone connection. 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 in particular relates to a dithizone graft chelating gel, a preparation method and a method for treating mercury-containing wastewater, which can also be used for the treatment of other heavy metal-containing industrial wastewater . Background technique [0002] With the increasing degree and scope of heavy metal pollution in my country's water, the harmless and efficient treatment technology of heavy metal polluted water has become a hot research direction. At present, the treatment methods of mercury-containing wastewater mainly include biological method, precipitation method, adsorption method, etc. The microorganisms used in the biological method are easy to be poisoned, and the processing capacity needs to be improved; in practical applications, the precipitation method is widely used because of its simple operation, bu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F20/56C08F8/34B01J20/26B01J20/30B01J13/00C02F1/28C02F1/62
Inventor 李宇亮朱棋黄蓉彭悦欣卢筱佳孙钰琨
Owner CHANGAN UNIV
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