Catalyst for treating chorine-containing organic matters in water and preparation method thereof

Abstract

The invention relates to a catalyst and a preparation method thereof, and particularly relates to a catalyst for treating chorine-containing organic matters in water and a preparation method thereof. According to the catalyst for treating chorine-containing organic matters in water, active components comprise four metals, namely bismuth, palladium, platinum and ruthenium, a carrier is a titanium dioxide / activated carbon composite carrier, and 0.15% of polytetrafluoroethylene is contained on the surface of the catalyst. The invention further provides a method for preparing the catalyst, the catalyst is adopted for removing 4-chlorophenol in wastewater by adopting an electrochemical reduction and oxidation combination method, and tests prove that by adopting the catalyst of the embodiment, the conversion rate of the 4-chlorophenol in the wastewater can achieve 100%, the dechlorination rate can achieve 100%, the removal rate of total organic carbon (TOC) can achieve 88.7%, and the catalyst further has great activity.

Description

technical field [0001] The invention relates to a catalyst and a preparation method thereof, in particular to a catalyst for treating chlorine-containing organic matter in water and a preparation method thereof. Background technique [0002] Organochlorine pesticides, such as HCH and DDT, have broad-spectrum and high-efficiency killing effects on pests and diseases, and were used on a large scale in the early years. Due to their stable chemical properties, slow degradation speed, heat and acid resistance, and easy residue, they can be It enters the human body through the accumulation in animals and plants and the action of the food chain, and the accumulated pollution in the biological chain can reach 20-30 years, causing great harm to human health. my country banned the use of such pesticides in 1983, but organochlorine pesticides can still be detected in many agricultural products. [0003] At present, the degradation methods of common organochlorine pesticides all have s...

AI Technical Summary

Problems solved by technology

my country banned the use of such pesticides in 1983, but organochlorine pesticides can still be detected in many agricultural products

[0003] At present, the degradation methods of common organochlorine pesticides all have some defects more or less: (1) The degradation selectivity by microorganisms is relatively high, but the cultivation of strains is very troublesome, and the strains have very strict requirements on temperature during degradation. Only at its optimum temperature can it have a high degradation rate, and it is difficult to use it on a large scale; (2) Ozone oxidation degradation has a broad spectrum, but it will also destroy the active ingredients at the same time, so it is more suitable for industrial wastewater treatment. It takes a long time to degrade, and the production cost of ozone is relatively high

(3) The use of mechanical ball milling for dechlorination is suitable for solid powder materials. Usually, CaO and drug-containing materials are mixed together in an argon atmosphere, and ball milled in a steel tank. After more than ten hours, the dechlorination in the material can be basically removed. Chlorine-containing pesticides, this method is time-consuming, expensive, and narrowly applicable; (4) The use of photocatalytic degradation technology has broad prospects. This method utilizes electron-hole pairs with redox capabilities produced by photocatalysts under the action of ultraviolet light Targets are effectively decomposed. Most of the literature uses nano-TiO2 aqueous suspensions to catalyze the degradation of pesticides in aqueous solutions. There are two main problems. One is that the catalytic materials are difficult to recycle and even cause secondary pollution, and the other is that The degradation selectivity of a single nanomaterial is not high