Application of a silica-supported perchloric acid-xanthate in the removal of chromium from industrial wastewater

A technology of xanthate and silicon dioxide, applied in water pollutants, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve environmental impact and other problems, achieve simple preparation process, wide application range, removes the effect that is noticeable

Active Publication Date: 2020-12-25
YANGZHOU POLYTECHNIC INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, excessive chromium will have serious effects on humans, animals and the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Add 2 g of silica gel (300-400 mesh), 6 mmol of perchloric acid, and 6 mmol of sodium ethyl xanthate to 10 mL of diethyl ether, stir at room temperature for 0.5-1 h, remove the diethyl ether with a rotary evaporator, and heat the remaining mixture under vacuum To 100°C, keep heating at 100°C under vacuum for 24 hours to obtain a yellow powder, which is silica-supported sodium perchloric acid-ethyl xanthate (hereinafter referred to as product A).

Embodiment 2

[0016] Add 2 g of silica gel (300-400 mesh), 6 mmol of perchloric acid, and 6 mmol of sodium butyl xanthate to 10 mL of ether, stir at room temperature for 0.5-1 h, remove the ether with a rotary evaporator, and heat the remaining mixture under vacuum To 105°C, keep heating at 105°C under vacuum for 24 hours to obtain a yellow powder, which is silica-supported sodium perchlorate-butyl xanthate (hereinafter referred to as product B).

Embodiment 3

[0018] Add 2 g of silica gel (300-400 mesh), 6 mmol of perchloric acid, and 6 mmol of sodium amyl xanthate to 10 mL of ether, stir at room temperature for 0.5-1 h, remove the ether with a rotary evaporator, and heat the remaining mixture under vacuum To 105°C, keep heating at 105°C under vacuum for 24 hours to obtain a yellow powder, which is silica-supported sodium perchloric acid-amyl xanthate (hereinafter referred to as product C).

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PUM

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Abstract

The invention relates to application of silicon dioxide-supported perchloric acid-xanthate in removing chromium from industrial wastewater. The silicon dioxide-supported perchloric acid-xanthate disclosed by the invention is characterized in that a preparation method for the silicon dioxide-supported perchloric acid-xanthate comprises the following steps: adding 300 to 400 meshes of silica gel, perchloric acid and xanthate into diethyl ether; stirring for 0.5 to 1h under room temperature; removing the diethyl ether by evaporation with a rotary evaporator; heating a remaining mixture to 100 to 105 DEG C under vacuum; and heating for 24 to 36h under the condition of keeping vacuum to obtain yellow powder, i.e., the silicon dioxide-supported perchloric acid-xanthate, wherein usage amount of the diethyl ether, the silica gel, the perchloric acid and the xanthate is that 1g of silica gel, 3mmol of perchloric acid and 3mmol of xanthate are added into every 5mL of diethyl ether; the xanthate is preferably selected from sodium ethyl-xanthate, potassium ethyl xanthate, sodium n-butyl-xanthate and potassium amyl xanthate.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to the application of silica-loaded perchloric acid-xanthate in the removal of chromium from industrial wastewater. Background technique [0002] The aluminum alloy itself contains metals such as aluminum, zinc, magnesium, copper, etc., through the surface alkali cleaning and pickling process, and in the process of producing aluminum alloy, the surface oxidation treatment of aluminum alloy should be carried out with materials containing chromium and nickel, which will generate a lot of waste water , Wastewater contains a large amount of aluminum ions and a small amount of zinc, magnesium ions and heavy metal ions nickel, chromium, copper and so on. [0003] Chromium is one of the essential trace elements for humans and animals, and plays an important role in the metabolism of the human body. However, excessive chromium will have serious effects on human body, animals and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/54C02F101/22
CPCC02F1/54C02F2101/22
Inventor 周寅飞徐忠娟王芳
Owner YANGZHOU POLYTECHNIC INST
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