Manufacturing method for fibrous heterogeneous Fenton reaction catalyst

Abstract

The invention discloses the design and manufacturing of functional fiber materials in the field of textile materials, relates to preparation of a fibrous heterogeneous Fenton reaction catalyst, in particular to a manufacturing method for fibers which can catalyze an oxidant (such as hydrogen peroxide and ozone), rapidly and efficiently oxidize and decompose a variety of dyes, and can be reused and be easily separated from water. The manufacturing method uses the technologies of precipitation polymerization, wet spinning, permeability enhancement, iron ion complexation, thermal crosslinking and the like comprehensively, and the obtained fibers can be used for treating dye wastewater and other water bodies containing organic matter. Compared with the existing heterogeneous Fenton reaction catalyst, the obtained fibers have better treatment effects on dye wastewater and the other water bodies containing organic matter. Compared with the Fenton reaction catalyst prepared by the fibers of the same type wet spinning method, the obtained fibers can efficiently oxidize and decompose organic matters at a very high speed to rapidly and effectively purify the water bodies, and simultaneously improve the reusability significantly and reduce the application cost, thereby meeting industrial practical requirements.

Description

technical field [0001] The invention belongs to the design and manufacture of functional fiber materials in the field of textile materials, and relates to the preparation of a fibrous heterogeneous Fenton reaction catalyst, specifically a fast and efficient oxidative decomposition catalyst capable of catalyzing oxidants (such as hydrogen peroxide, ozone, etc.) A dye, reusable fiber that easily separates from water bodies. The manufacturing method comprehensively uses technologies such as precipitation polymerization, wet spinning, penetration ability improvement, iron ion complexation, thermal crosslinking, etc., and the obtained fiber can be used for the treatment of water bodies containing organic matter such as dye wastewater. Background technique [0002] With the rapid development of society and the continuous progress of industry, the increasingly serious water pollution problem has posed a major threat to human survival and safety, and has become a major obstacle to h...

AI Technical Summary

Problems solved by technology

The supported iron catalyst can better solve the problem of secondary pollution of iron ions in the homogeneous Fenton system. The carrier can be either an organic carrier or an inorganic carrier. The Nafion membrane is a perfluorosulfonic acid anionic polymer. Cation exchange membranes have the advantages of heat resistance, corrosion resistance and high strength, but due to the high price of Nafion membranes, problems such as the oxidation resistance and membrane fouling of the membranes need to be considered in practical applications (Wu Wei, Wu Chengcheng, Zhao Yaping, Heterogeneous Fenton Research progress on the degradation of organic pollutants by technology, Environmental Science and Technology, 2010, 06: 99-104); in addition, some polymeric organic compounds such as sodium alginate, etc., can also be used as immobilized carriers (Cruz A, Couto L, Esplugas S , et al., Study of the contribution of homogeneous catalysis on heterogeneous Fe(III) / alginatemediated photo-Fenton process, Chemical Engineering Journal, 2016, 318: 272-280), but this type of support is difficult to withstand the oxidation corrosion of OH

Among inorganic materials, alumina is a common catalyst carrier, and molecular sieves are also often used as catalyst carriers (Zhou Yaliang, Huang Dongyue, Types and Research Progress of Fenton Reaction Technology, Guangdong Chemical Industry, 2013, 40(1): 74-74 ); clay, the main component of which is kaolin, is often used as a carrier of iron ions (Li Huanyu, Research Progress in the Treatment of Organic Pollutants by Heterogeneous Fenton Reaction, Architecture and Budget, 2015, 06: 47-50), with inorganic materials as carriers The heterogeneous Fenton reaction catalyst has the advantages of low cost, high specific surface area and strong adsorption capacity, but the catalyst preparation process is complicated, and the powder catalyst is difficult to recycle, and its application is restricted

Iron powder or iron ore catalysts mainly exist in natural ores. Magnetic materials include magnetite, maghemite, perovskite, lepidocite and spinel, etc. Non-magnetic materials include hematite and goethite. etc. Iron powder and these mineral materials themselves can be combined with H 2 o 2 Constitute a Fenton system to degrade organic matter (Khataee A, Taseidifar M, Khorram S, et al., Preparation of nanostructured magnetite with plasma for degradation of a cationic textile dye by the heterogeneous Fenton process, Journal of the Taiwan Institute of Chemical Engineers, 2015, 53: 132 -139; Munoz M, Pedro Z M D, Casas J A, et al., Preparation of magnetite-based catalysts and their application in heterogeneous Fenton oxidation-A review, Applied Catalysis B Environmental, 2015, 176: 249-265), but iron oxide The Fenton reaction system is greatly affected by pH. Under acidic conditions, the dissolution of iron ions can induce H 2 o 2 OH is produced, but the dissolved iron ions will eventually generate iron sludge, causing secondary pollution, and there are fewer types of ore iron and limited sources, which limit its further application