Application of sodium bismuthate in rapidly degrading organic dye waste water and degradation method

An organic dye and rapid degradation technology, which is applied in energy wastewater treatment, chemical instruments and methods, textile industry wastewater treatment, etc., can solve the problems of high cost and long treatment time, and achieve strong applicability, low operating cost and low energy consumption. low effect

Inactive Publication Date: 2009-09-02
NANJING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problems of long processing time and high cost in the existing organic dye wastewater treatment, the present invention proposes a method of using sodium bismuthate in rapidly degrading organic dye wastewater to catalyze the degradation of organic dye wastewater. Small, easy to operate, no secondary pollution, mild reaction, can achieve the goal of decolorization, degradation, and removal of dyes in a short period of time

Method used

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  • Application of sodium bismuthate in rapidly degrading organic dye waste water and degradation method

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Prepare 62.5mg / L saffron red aqueous solution to simulate dye wastewater, and measure 80mL of dye solution into the reactor. A stirring bar is placed in it, and the solution is stirred under the action of the stirrer. The reactor is protected by water cooling, and circulating condensed water can keep the whole reaction at room temperature during the reaction. Weigh 130mg NaBiO 3 Add the above solution, mix well under the action of stirring, and then irradiate with visible light to decolorize the dye solution. Subsequently, the change of saffron red with the reaction time and the change of TOC were measured. The experimental results showed that the concentration of saffron red decreased by 98.7% and the TOC decreased by 79% within 14 minutes.

Embodiment 2

[0020] Prepare 57 mg / L methyl violet aqueous solution to simulate dye wastewater, and measure 70 mL of dye solution into the reactor. A stirring bar is placed in it, and the solution is stirred under the action of the stirrer. The reactor is protected by water cooling, and circulating condensed water can keep the whole reaction at room temperature during the reaction. Weigh 100mg NaBiO 3 Add the above solution, mix well under the action of stirring, and then irradiate with visible light to decolorize the dye solution. Subsequently, the change of the concentration of methyl violet with the reaction time and the change of TOC were measured. The experimental results showed that the concentration of methyl violet decreased by 99% and the TOC decreased by 67% within 9 minutes.

Embodiment 3

[0022] Prepare 100 mg / L basic fuchsin aqueous solution to simulate dye wastewater, and measure 80 mL of dye solution into the reactor. A stirring bar is placed in it, and the solution is stirred under the action of the stirrer. The reactor is protected by water cooling, and circulating condensed water can keep the whole reaction at room temperature during the reaction. Weigh 120mg NaBiO 3 Add the above solution, mix well under the action of stirring, and then irradiate with visible light to decolorize the dye solution. Subsequently, the variation of the concentration of basic fuchsin with the reaction time and the variation of TOC were measured. The experimental results showed that the concentration of basic fuchsin decreased by 99% and the TOC decreased by 87% within 40 minutes.

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Abstract

The invention discloses application of sodium bismuthate in rapidly degrading organic dye waste water and a degradation method. The method comprises the following steps: removing impurities of the organic dye waste water by grates, standing and settling the waste water; and adjusting pH value to between 7 and 10; introducing the waste water into a reaction vessel, adding NaBiO3 into the reaction vessel, irradiating the mixture by visible light, reacting the mixture under stirring, and discharging the waste water after being processed; and when the concentration of the organic waste water exceeds 130 mg/L, diluting the waste water, wherein the selected sodium bismuthate is a commercial article and can be directly purchased; the adding concentration is 0.1 to 2 g/L economically; and when the adding concentration exceeds 3g/L, excessive solid particles disperse illumination to reduce the photolysis efficiency. The method has strong applicability to processing the dye waste water and can be performed at normal temperature. The catalytic oxidizer has strong oxidation capability, can oxidize most organic dyes, has high degradation speed, obviously reduced TOC and low cost, and is easy for mass production and use.

Description

Technical field: [0001] The invention relates to a treatment method of organic dye wastewater, more specifically the application and degradation method of sodium bismuthate in rapidly degrading organic dye wastewater. Background technique: [0002] Water resources, together with energy resources and arable land resources, are called the three important strategic resources supporting the sustainable development of my country's economy and society. With the rapid development of the dye textile industry, the variety and quantity of dyes are increasing. Synthetic dye factories and printing and dyeing factories discharge a large amount of dye wastewater every year, which has become one of the key pollution sources of the water system environment. Effective treatment of these wastewater is an environmental protection. Inevitably required. However, dye wastewater has complex water quality, high content of organic pollutants, large pH value changes, large differences in COD and BOD...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F1/30C02F1/72C02F101/30C02F103/30
CPCY02W10/37
Inventor 孙成喻恺杨绍贵何欢谷成刚
Owner NANJING UNIV
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