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Process for purifying chromium-containing wastewater

A chromium wastewater and process technology, applied in the direction of water pollutants, other chemical processes, water/sewage treatment, etc., can solve the problems of poor effect, long time-consuming, low removal rate, etc.

Inactive Publication Date: 2012-05-09
孙永铎
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ordinary adsorption method generally has poor effect, low removal rate, and takes a long time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] The invention modifies the carbon nanotubes by mixed acid, and then utilizes the modified carbon nanotubes to adsorb Cr(VI) in the chromium-containing wastewater;

[0011] The instrument and medicine used in the present invention are: KH5200 type ultrasonic wave; HY-4 multi-purpose constant temperature oscillator for speed regulation; 722 grating spectrophotometer; PHS-3C type acidity meter; carbon nanotube; potassium dichromate (analytical pure); nitric acid (analytical pure); sulfuric acid (analytical pure); sodium hydroxide (analytical pure), etc. Reagents were made into required solutions with double distilled water;

[0012] The specific experimental steps of the present invention are: modification of carbon nanotubes; adsorption of chromium Cr(VI);

[0013] The removal effect of modified nanotubes on Cr(VI) in water was significantly higher than that of unmodified carbon nanotubes. -1 In the Cr(VI) solution, when the amount of carbon nanotubes was 0.2g, the remo...

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Abstract

The invention relates to a process for purifying chromium-containing wastewater. In the process, Cr (VI) in an aqueous solution is adsorbed by using a modified carbon nanotube, so that wastewater is purified. The invention provides a process for effectively purifying the chromium-containing wastewater. In the process, a carbon nanotube is modified by using a mixed acid, and the modified carbon nanotube is used for adsorbing the Cr (VI) in chromium-containing wastewater.

Description

Technical field: [0001] The invention relates to a process for purifying chromium-containing wastewater. The process utilizes modified carbon nanotubes to adsorb Cr(VI) in water solution, thereby purifying the wastewater. Background technique: [0002] With the development of industry, a large amount of chromium-containing wastewater has become a major environmental pollutant, causing water and soil pollution. Hexavalent chromium in chromium compounds is more toxic and has a strong carcinogenic effect on the human body, so the purification of chromium-containing Cr(VI) wastewater is an important environmental problem. Its treatment mainly includes chemical reduction-precipitation method, electrolytic reduction method, membrane filtration method, biological bacteria enrichment method and adsorption method. Among them, the adsorption method has become one of the main methods for the removal of chromium ions due to its advantages of simple and convenient operation, good treatm...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/62B01J20/20C02F101/22
Inventor 孙永铎
Owner 孙永铎