Rapid decolorisation of dyeing wastewater by Fe^III(2,2′:6′,2″‐terpyridine)activated peroxymonosulphate

Abstract

The discharge of colored textile printing and dyeing wastewater causes environmental pollution. The fading of wastewater efficiently, simply and with low consumption is a problem to be considered. Herein, a catalytic method for rapid decolorization of organic dyes was devised employing terpyridine iron complex to activate oxidized permonosulfate (PMS). CI Acid Red 1 (AR1) was used as the simulated pollutant, the influences of operating parameters on the fading effects of wastewater were explored. According to the results, the produced catalytic system exhibits a universal catalytic effect. Even when the dye concentration reaches 76.4 mg/L, the dyeing wastewater may be effectively decolorized. In addition, when anions (HCO3−, SO42−, Cl−) were present in the solution, the degradation effect of AR1 was still effective. Interestingly, active species such as sulfate radicals and singlet oxygen were detected in the catalytic degradation system by radical capture experiments. The total organic carbon (TOC) can reach a removal rate of 26.22% at 2 h. This research provides a unique enzyme‐like catalytic system for the rapid breakdown of dye contaminants.This article is protected by copyright. All rights reserved.