Treatment and purification method of dyeing wastewater produced by wood processing

Abstract

The invention relates to the technical field of wood processing and treating, and discloses a treatment and purification method of dyeing wastewater produced by wood processing. According to the treatment and purification method of dyeing wastewater produced by wood processing, prepared mangano-manganic oxide nanoparticles grow and attach onto pore channels of a porous structure of active zeolite,so that a porous compound doped with rod-like mangano-manganic oxide is obtained; and thus, synergistic effects and interface effects can be produced so as to facilitate adsorption and degradation ofdye molecules. In the presence of light irradiation, electrons on photo-degradable materials are excited so as to produce transition, so that photo-induced electron holes are formed so as to furthercombine with oxygen to produce superoxide anions with super-strong oxidability; and thus, organic dyes, which are difficult to degrade, are degraded into carbon dioxide and water. Therefore, degradation rate of dyes by adopting the treatment and purification method can be up to 99% or above; and reuse rate of the porous compound doped with rod-like mangano-manganic oxide can be up to 10 times or above. Tests have proven that degradation rate of methylthionine chloride within 60 minutes by adopting the treatment and purification method can be up to 100%; moreover, the treatment and purificationmethod has the advantages of being energy-saving, efficient, green, safe, capable of ensuring complete degradation, free of secondary pollution and so on.

Description

technical field [0001] The invention belongs to the technical field of wood processing and treatment, in particular to a method for treating and purifying dye wastewater in wood processing. Background technique [0002] Dyes are substances that can color fibers and other materials. Dyes are divided into two categories: natural and synthetic. Dyes are colored substances. But colored substances are not necessarily dyes. Dye is a substance that can make a certain color adhere to the fiber, and is not easy to fall off and change color. Dyes are usually soluble in water, and some dyes require a mordant to allow the dye to adhere to the fibers. Archaeological data show that dyeing techniques have been used in India and the Middle East for more than 5,000 years. With the rapid development of social economy, wastewater pollution, especially dye wastewater pollution, has become a serious environmental pollution problem worldwide. Once the dye wastewater is directly discharged in...

AI Technical Summary

Problems solved by technology

Once the dye wastewater is directly discharged into rivers and lakes, a large amount of organic compounds will consume the dissolved oxygen in the water. At the same time, the dye wastewater with complex colors will directly absorb the light shining into the water, thereby reducing the transparency of the water and destroying the ecology of the water. Balance, a great threat to the health of humans and aquatic organisms

[0003] In the current wood processing, dyes of various colors are indispensable, and the treatment of dyes has become the biggest problem. In the existing treatment methods, physical adsorption has extremely high requirements on the adsorption materials, and the existing materials are not resistant to acid and alkali, and are easy to produce Concentration polarization, easy to be polluted, low reuse rate, high treatment cost, etc., incomplete adsorption, easy introduction of new substances in chemical treatment, large amount of use, high cost, large amount of sludge generated, difficult dehydration, etc.