A method of treating rhodamine B dye waste water through photocatalytic degradation

A dye wastewater and a treatment method technology, applied in the field of photocatalytic degradation of rhodamine B dye wastewater treatment, can solve the problems of few photocatalytic active sites, low efficiency of rhodamine B, weak component binding ability, etc., and achieve reaction conditions Easy control, high photocatalytic activity and photocatalytic stability, low cost effect

Active Publication Date: 2017-06-20
SUZHOU RUIPENGCHENG SCI & TECH CO LTD
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, to provide a treatment method for photocatalytic degradation of rhodamine B dye wastewater with simple operation, low cost and high degradation efficiency, which solves the problem of existing bismuth tungstate-based composite The specific surface area of ​​the photocatalyst is not high, the photocatalytic active sites are few, and the binding ability between the components is weak, which leads to the low efficiency of photocatalytic degradation of rhodamine B.

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  • A method of treating rhodamine B dye waste water through photocatalytic degradation

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Embodiment 1

[0025] A treatment method for photocatalytic degradation of rhodamine B dye wastewater, comprising the following steps:

[0026] a. Add 100ml of rhodamine B solution with a concentration of 20mg / L in a 200ml Erlenmeyer flask, add 50mg of boron nitride-bismuth tungstate composite photocatalyst into the rhodamine B solution, and stir magnetically for one hour in the dark reached adsorption equilibrium. Measure the concentration with an ultraviolet-visible spectrophotometer, which represents the initial concentration of the solution to be degraded and is recorded as C 0 .

[0027] b. The rhodamine B solution added with boron nitride-bismuth tungstate photocatalyst in step a is subjected to a photocatalytic reaction under the irradiation of a 500W xenon lamp of a visible light source and starts timing, and the distance between the light source and the liquid surface is 20cm. Draw 5ml of solution from the reaction system of each group every 20min, centrifuge at 5000r / min for 5min...

Embodiment 2

[0042] A treatment method for photocatalytic degradation of rhodamine B dye wastewater, comprising the following steps:

[0043] a. Select dye wastewater from a printing and dyeing factory in Jiangyin City, Jiangsu Province. The main pollutant of the dye wastewater is rhodamine B. After testing, the concentration of rhodamine B exceeds 120mg / L. The dye wastewater is diluted to a concentration of rhodamine B of 20mg / L.

[0044] b. by the ratio of boron nitride-bismuth tungstate composite photocatalyst and rhodamine B dye wastewater to the ratio of 50g: 100L, add boron nitride-bismuth tungstate composite photocatalyst in the above-mentioned diluted rhodamine dye wastewater, in Stir magnetically in the dark for one hour to reach adsorption equilibrium. Measure the concentration with a UV-Vis spectrophotometer, which represents the initial concentration of the solution to be degraded and is recorded as C 0 .

[0045] Wherein, the boron nitride-bismuth tungstate composite photoca...

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Abstract

A method of treating rhodamine B dye waste water through photocatalytic degradation is disclosed. The method includes steps of adding a boron nitride-bismuth tungstate composite photocatalytic catalyst into rhodamine B dye waste water having a concentration of 15-25 mg/L, with the ratio of the composite photocatalytic catalyst to the waste water being 40-60 g:100 L; performing a photocatalytic reaction under an xenon lamp the power of which is 400-600 W to complete degradation of organic pollutants, with the distance between the xenon lamp and the liquid surface of the waste water being 18-22 cm. The composite photocatalytic catalyst is prepared by adding a bismuth tungstate precursor solution into a tetrahydrofuran solution of dicarbadodecaborane, performing a coordination polymerization reaction with the existence of 4,4'-bipyridine in a hydro-thermal environment, and subjecting the obtained coordination polymer to high-temperature thermal treatment. The method has advantages of simple operation, a low cost, a high degradation efficiency, and the like.

Description

technical field [0001] The invention relates to the technical field of organic dye wastewater treatment, in particular to a treatment method for photocatalytically degrading rhodamine B dye wastewater. Background technique [0002] In the process of textile printing and dyeing, a large number of auxiliaries that pollute the environment and are harmful to the human body are used. Most of these auxiliaries are discharged in the form of liquid and inevitably enter the water environment, causing water pollution. For example, rhodamine B dyes are carcinogenic and mutagenic. This type of wastewater has deep chroma, high content of organic pollutants, and poor biodegradability. It is difficult to treat with conventional methods such as physical adsorption and Fenton methods, resulting in long-term deterioration of polluted water quality. , seriously endangering the water environment and human health, so the degradation treatment of this type of wastewater is very important and urge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/30C02F1/72C02F1/74C02F101/34C02F101/38C02F103/30
CPCC02F1/30C02F1/725C02F1/74C02F2101/308C02F2101/34C02F2101/38C02F2103/30C02F2305/10Y02W10/37
Inventor 刘军亮
Owner SUZHOU RUIPENGCHENG SCI & TECH CO LTD
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