Five-wavelength ultraviolet spectrum method for evaluating reduction performance of metal catalysis reductant

Abstract

The invention belongs to the technical field of detection methods, and discloses a five-wavelength ultraviolet spectrum method for evaluating reduction performance of metal catalysis reductant. The method includes the steps of 1, absorbancy-wavelength standard curves of 1,2-dichlorobenzene, chlorobenzene and benzene are drawn; 2, the characteristic absorption wavelength is determined according to the standard curves, and the absorbancy-concentration standard curve of all the substances at the characteristic wavelength position is drawn to determine the extinction coefficient; 3, a mathematical formula is set up; 4, the metal catalysis reductant is added into simulation wastewater containing 1,2-dichlorobenzene to react in a contact mode and stands, supernate is taken and scanned in a full-wavelength range, light absorption values at the 260 nm, 269 nm, 277 nm, 290 nm and 300 nm positions are recorded, the concentration of dichlorobenzene, chlorobenzene and benzene in the simulation wastewater is calculated, the reduction capacity of the catalysis reductant and the catalysis effect of the catalysis reductant under different reaction conditions are evaluated. The method is simple and capable of fast evaluating reduction performance of metal catalysis reductant.

Description

technical field [0001] The invention belongs to the technical field of detection methods, and relates to a method for evaluating the reducing ability of a metal catalytic reducing agent, in particular to a detection method for evaluating the treatment effect of dichlorobenzene in simulated wastewater by catalytic reduction of a metal catalytic reducing agent using an ultraviolet spectrum analysis method . Background technique [0002] Chlorobenzene compounds are usually used as solvents, insecticides, fungicides and intermediates for the synthesis of many organic compounds. O-dichlorobenzene is widely used and is an important organic chemical raw material for the production of dyes, medicines, pesticides, engineering plastics, etc. They pass It enters the environment in various ways, pollutes water bodies, soil, sediment layers, aquifers, etc., and bioaccumulates in the important food chains of humans, especially in aquatic organisms. Some also volatilize into the air and c...

AI Technical Summary

Problems solved by technology

The shortcomings of these methods increase the unpredictability of the research process. Therefore, there is an urgent need for a fast and efficient detection technology to simultaneously detect the process of metal catalytic reducing agents degrading dichlorobenzene, so as to better screen catalytic reducing agents and adjust Reaction conditions, such as: concentration of dichlorobenzene, amount of catalytic reducing agent, type of catalytic reducing agent and treatment temperature, etc.

Images