Open AccessRapid determination of dye concentration in wastewater by TiO2-KMnO4 synergistic photocatalytic oxidation system
Author(s) -
Yuan Yao,
Anqi Hong,
Hanwei Fang,
Zhipeng Shen,
Yiping Zhang
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/332/2/022043
Subject(s) - potassium permanganate , photocatalysis , permanganate , chemistry , wastewater , methyl orange , potassium dichromate , inorganic chemistry , redox , nuclear chemistry , catalysis , organic chemistry , environmental engineering , engineering
A new method for the determination of dye concentration based on photocatalytic oxidation digestion and spectrophotometry was established by using KMnO 4 synergistic TiO 2 photocatalytic oxidation and methyl orange solution as simulated dye wastewater. The mechanism of photocatalytic oxidation for the determination of dye concentration was discussed, and the optimal reaction conditions for dye digestion were investigated. The optimal digestion conditions were as follows: solution pH 1.5, TiO 2 amount 1.0 g/L, KMnO 4 initial concentration 10.0 mmol/L, solution temperature 80°C, ultraviolet light irradiation time 10 min. Compared with potassium dichromate reflux method or potassium permanganate method, the photocatalytic digestion method of TiO 2 -KMnO 4 synergistic system is more rapid, efficient, economical and environmentally friendly, which provides a new idea for the determination of dye concentration in wastewater.