Titanium dioxide acid hydrolysis modified high efficiency multifunctional decoloring agent and preparation method thereof

Abstract

The invention relates to a modified and high-efficiency multi-function decolorizer of titanium dioxide acid hydrolysis waste residue and a preparation method thereof. Acid hydrolysis waste residue containing titanium sulfate is successively and respectively added with sodium hydroxide, peroxide, waste acid and calcium and magnesium powder according to the weight rate of the materials, therefore, the acid hydrolysis waste residue containing titanium sulfate generates nanometer titanium dioxide by nutralization, hydrolysis and acidification; added ferrous iron and iron in the acid hydrolysis waste residue are dehydrated at the temperature of 100-200 DEG C, oxidized at the temperature of 400-500 DEG C and then generate polymerization ferrous sulfate after natural cooling, telomerization and aging. The organic pollutants in wastewater are rapidly degraded by nano TiO2 and directly converted into non-toxic and harmless CO2, H2O and inorganic matters. Without changing the pH value of original sewage, the coagulation speed is fast, alumen ustum is big, settlement is quick, and the decolorizer has the functions of decolorization, degerming, removing radioactive elements and heavy metal ions, reducing COD and BOD, small feeding amount and strong adaptability.

Description

【Technical field】 [0001] The invention belongs to the technical field of chemical treatment agents, and relates to a photocatalytic degradation and coagulation effect on waste water, so that organic pollutants in waste water can be directly converted into non-toxic and harmless CO 2 、H 2 A high-efficiency multifunctional decolorizer modified by titanium dioxide acid hydrolysis waste residue of O and inorganic substances and a preparation method thereof. 【Background technique】 [0002] Dye wastewater contains carcinogenic substances such as benzene rings, amino groups, and azo group organic compounds. Wastewater containing surfactants is prone to odor and foam, and will affect the biodegradability of wastewater. Nonionic and cationic surfactants are very It is difficult to biodegrade, and sometimes produces toxic or insoluble intermediates. Conventional methods have low treatment efficiency, problems such as color reversion and COD cannot be reduced, and even secondary pollu...

AI Technical Summary

Problems solved by technology

[0002] Dye wastewater contains carcinogenic substances such as benzene rings, amino groups, and azo group organic compounds. Wastewater containing surfactants is prone to odor and foam, and will affect the biodegradability of wastewater. Nonionic and cationic surfactants are very Refractory to biodegradation, and sometimes produce toxic or insoluble intermediates. Conventional methods have low treatment efficiency, problems such as color reversion and COD cannot be reduced, and even secondary pollution