Method for carrying out intensified reductive dechlorination on triclosan in sewage by using vitamin B12

A technology of B12 and vitamins, applied in the direction of reduced water/sewage treatment, etc., can solve the problems of uneconomical and high cost, and achieve the effects of fast reaction rate, reduced toxicity and low cost

Inactive Publication Date: 2014-12-24
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Studies have shown that adding Pd to nZVI system can improve the removal effect of dioxin, trichlorethylene and tetrachlorethylene, but this method is too expensive and ...

Method used

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  • Method for carrying out intensified reductive dechlorination on triclosan in sewage by using vitamin B12
  • Method for carrying out intensified reductive dechlorination on triclosan in sewage by using vitamin B12

Examples

Experimental program
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Effect test

Embodiment 1

[0025] B vitamins first 12 An enhanced reductive dechlorination method for triclosan in sewage, treating sewage containing 10 mg of triclosan per liter.

[0026] Adjust the initial pH value of sewage to 5, and add vitamin B to the system at the same time 12 50 milligrams per liter of sewage, 0.5 grams of nano-zero-valent iron per liter of sewage, and stir evenly, wherein the particle diameter of nano-zero-valent iron is 50-70 nanometers.

Embodiment 2

[0028] The difference from Example 1 is that the initial pH value of the sewage should be adjusted to 6.

Embodiment 3

[0030] The difference from Example 1 is that the initial pH value of the sewage should be adjusted to 7.

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Abstract

The invention relates to a method for carrying out intensified reductive dechlorination on triclosan in sewage by using vitamin B12. According to the method, nano zero-valent iron and vitamin B12 are added to sewage containing triclosan under the condition that the pH value is 5-9, the reaction time is 5-10 hours, so that sewage is subjected to intensified reductive dechlorination, wherein the mass concentration of triclosan in sewage is 1-20mg/L; 0.1-1g of nano zero-valent iron is added to each liter of sewage; and 10-100mg of vitamin B12 is added to each liter of sewage. Compared with the prior art, the method disclosed by the invention is simple in reaction condition, mild in reaction, short in treatment time, high in triclosan removal rate, free of secondary pollution, suitable for treatment of sewage containing triclosan and other pharmaceutical wastewaters, and beneficial to resource utilization of the sewage.

Description

technical field [0001] The invention relates to a sewage treatment method containing triclosan, in particular to a method for utilizing vitamin B 12 A method for intensified reductive dechlorination of triclosan in sewage. Background technique [0002] Pharmaceuticals and personal care products (PPCPs) are trace organic pollutants commonly found in water and sewage after pesticides, herbicides and endocrine disruptors, and their impact on the environment It has attracted widespread attention at home and abroad. Once PPCPs enter the human body, they will be converted into polar and soluble metabolites and acids, and will be discharged into urban sewage along with urine and feces. Studies have shown that it is difficult to completely remove all PPCPs by traditional biological methods. Therefore, the residual PPCPs after treatment in the sewage plant will enter the surface water, groundwater or seawater along with the discharge of the tail water of the sewage plant, thereby ...

Claims

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Application Information

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IPC IPC(8): C02F1/70
Inventor 王林
Owner TONGJI UNIV
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