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

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...

AI Technical Summary

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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