Preparation method and application of composite paper based material with function of absorbing and degrading organic wastewater

Abstract

The invention relates to a preparation method and application of a composite paper based material with a function of absorbing and degrading organic wastewater. The composite paper based material comprises 30-50 percent of metallic oxide powder, 15-35 percent of adsorbent powder, 0-10 percent of inorganic fiber, 10-30 percent of paper pulp, 5-15 percent of inorganic bond and 0.5-5 percent of binary retention aid. The preparation method comprises the steps of: preparing the metallic oxide powder, the absorbent powder, the inorganic fiber, the paper pulp and the inorganic bond into a suspension with concentration of 2-30 percent; adding the binary retention aid and diluting until the concentration is 0.5 percent; forming a wet paper board on a paper forming device; and obtaining the composite paper based material through squeezing and drying. The composite paper based material is placed on a liquid level of low-concentration organic wastewater with an ultraviolet liquid source so as to realize continuous liquid catalytic degradation. By using the paper based material, the problems of high cost, difficult separation of the light catalyst powder from the wastewater, and the like when the composite catalytic material is prepared by using zeolite and the like as carriers are solved, and the absorption and concentration function is obtained for the organic matters in the low-concentration wastewater.

Description

technical field [0001] The invention relates to a preparation method of a composite material with photocatalytic function, specifically to prepare a composite paper-based material capable of absorbing and degrading low-concentration organic waste water, and belongs to the field of material science. Background technique [0002] With the rapid development of my country's economy, industries such as dyestuffs, leather, and papermaking have grown rapidly, and the problem of organic wastewater generated in the production process has become increasingly serious. These industrial organic wastewaters have complex components, high chroma, large emissions, high toxicity, and poor biochemical properties, especially organic wastewater containing benzene rings has always been a difficult problem in industrial wastewater treatment. So far, there is no economical and effective treatment method at home and abroad. . In recent years, titanium dioxide photocatalytic treatment technology has...

AI Technical Summary

Problems solved by technology

It has been confirmed through research that almost all dyes can be degraded through the photocatalytic process, and many dyes that cannot be biodegraded can also be converted through the photocatalytic process, but large-scale commercial applications or products are still rare.

This can be attributed to three reasons: (1) the wide band gap energy of titanium dioxide leads to low solar energy utilization rate and low photocatalytic quantum efficiency; (2) in the wastewater suspension system, the fine photocatalyst powder is easy to Coagulation inactivation, and difficult to separate, recycle and reuse

Judging from the situation of literature retrieval, there have been many reports at home and abroad on the preparation of titanium dioxide composite catalytic materials using zeolite, glass, ceramics, conductive glass, etc., but the preparation costs of these methods are high, and TiO 2 small load

(3) The photocatalytic degradation rate of metal oxide powders such as titanium dioxide to low-concentration organic wastewater is slow, mainly because the concentration of organic matter in low-concentration organic wastewater on the surface of titanium dioxide powder is small

Apply this technology to invent a preparation method and application of a composite paper-based material with the function of absorbing and degrading organic matter (patent application number: 200810070938.5), but because the composite paper-based material in this patent application has no water resistance, it cannot be applied Photocatalytic degradation of organic wastewater