Paper mill wastewater treatment by Fe(2+)and heat-activated persulfate oxidation: Process modeling and optimization


Can-Guven E. , Guvenc S. , Kavan N., VARANK G.

ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY, vol.40, no.2, 2021 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 40 Issue: 2
  • Publication Date: 2021
  • Doi Number: 10.1002/ep.13508
  • Journal Name: ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
  • Journal Indexes: Science Citation Index Expanded, Scopus, PASCAL, Applied Science & Technology Source, Aqualine, Aquatic Science & Fisheries Abstracts (ASFA), Biotechnology Research Abstracts, Chemical Abstracts Core, Compendex, Computer & Applied Sciences, Environment Index, Greenfile, INSPEC, Pollution Abstracts
  • Keywords: activated persulfate oxidation, paper mill wastewater, response surface methodology, sulfate radicals, CARBONIZED DATE PITS, ORGANIC POLLUTANTS, AQUEOUS-SOLUTIONS, METAL BIOSORPTION, PULP, REMOVAL, ELECTROCOAGULATION, DEGRADATION, EFFLUENTS, INDUSTRY

Abstract

This study investigated Chemical Oxygen Demand (COD) and turbidity removal from paper mill industry wastewater via Fe2+/heat-activated persulfate oxidation. A mathematical model was developed, and the process variables (pH, reaction time, PS/COD, Fe(2+)concentration for Fe2+-activated PS, and temperature for heat-activated PS) were optimized using the Response Surface Methodology and Central Composite Design methods. Under the optimum conditions, respectively, 70.9 and 99.4% COD and turbidity removal efficiencies were obtained for Fe2+-activated PS oxidation, while 56.1 and 98.9% COD and turbidity removal efficiencies were determined for heat-activated PS oxidation. The results indicated that both processes are efficient for paper mill industry wastewater treatment, and central composite design is an appropriate method for designing and optimizing process parameters.