Effect of the Standardized ZnO/ZnO-GO Filter Element Substrate driven Advanced Oxidation Process on Textile Industry Effluent Stream: Detailed Analysis of Photocatalytic Degradation Kinetics

A simple process of synthesizing coated filter elementsubstrates(FES) containing zinc oxide (ZnO) nanorods and ZnO graphene-oxidenanocomposite for a pilot-scale industrial dye-effluent treatmentplant is proposed. This work reports a detailed analysis of the photocatalysismechanism on real industrial effluent streams containing a mixtureof dyes. The analysis is very relevant for conducting advanced oxidationprocess-assisted effluent remediation at a field-level treatment operation.Estimation of the dye concentration shows nearly complete (& GE;98%)degradation from an initial dye sample concentration. A detailed studyfor the analysis of the initial reactive dyes and their degradationproducts was performed for quantification and identification of thedegradation products through various spectral techniques. A designof the remediation mechanism through degradation pathways is proposedfor characterizing the organic compounds in the degraded dye products.A regeneration and reusability study was performed on the FES presentingthe durability of the FES-designed synthesis process originally for11 cycles and regenerated FES for six cycles for achieving a thresholdof 60% degradation efficiency. The experimental results demonstratethe efficacy of FES through the designed immobilized approach forthe complete remediation of textile dye effluents for a 4 h treatmentplant process and the consistent operability of the FES for the combineddye wastewater treatment operations.

Automated summary

This study proposes a simple process for synthesizing coated filter element substrates containing zinc oxide nanorods and ZnO graphene-oxide nanocomposite for industrial dye-effluent treatment. The research provides a detailed analysis of the photocatalysis mechanism on real industrial effluent streams, which is relevant for advanced oxidation process-assisted effluent remediation at a field-level treatment operation. The study quantifies and identifies the degradation products of reactive dyes through various spectral techniques and proposes a remediation mechanism for characterizing the organic compounds in the degraded dye products.