Optimization of electro-Fenton process applied to the treatment of codfish brines in a context of industrial symbiosis DOI Creative Commons
Luana Sarinho, Pedro J. Carvalho,

Diana T. Patoilo

и другие.

Journal of Environmental Management, Год журнала: 2025, Номер 381, С. 125205 - 125205

Опубликована: Апрель 9, 2025

The ancient method of preserving fish by salting is still widely practiced but generates two challenging waste streams: contaminated salt (solid) and brine (liquid). Conventional treatment methods are ineffective in reducing the organic content due to its high (≅ 25-30 % wt. NaCl). Although advanced oxidation processes extensively used for treating certain wastewaters, their application real saline effluents near saturation, such as food industry brines, remains underexplored. This study optimized electro-Fenton (EF) process brines from codfish industry, aiming reuse treated pickling stage tannery thereby diverting streams environment disposal. A central composite experimental design response surface methodology were evaluate effects three EF operating variables: (i) current density (76-429 m-2), (ii) electrolysis time (1.0-10.0 min), (iii) hydrogen peroxide concentration ([H2O2], 50-201 mM), using iron electrodes. primary goal was maximize total carbon (TOC) removal brine. Additionally, specific roles reactive oxygen chlorine species responsible TOC (such HO•, Cl•, ClO, O2•-/HO2• HClO/OCl-) investigated scavengers. results revealed that O2•-, HO2• main active species. optimal conditions determined be a 275 m-2, 5.2 min, [H2O2] 91 mM, resulting 70 TOC. diluted ≅ 7.5-8.0 NaCl, tested hide trials assess impact on quality wet-blue leathers. Results showed did not affect leather quality; instead, they enhanced shrinkage temperature 103 °C 112 °C. increase broadens potential applications leather, making it suitable wider range markets products. Furthermore, chromium oxide fixed increased 4.1 5.3 %, industrial wastewater generated at end process. valorisation presents promising opportunity symbiosis between industries.

Язык: Английский

Enhanced photocatalytic dye detoxification by banana peel derived enzyme inherited ZnO/g-C3N4 nanocomposite: Validation by soil health and seed germination analyses DOI

R. Sasirekabai,

T. Jayakumari,

R. Anandhi

и другие.

International Journal of Biological Macromolecules, Год журнала: 2025, Номер unknown, С. 139812 - 139812

Опубликована: Янв. 1, 2025

Язык: Английский

Процитировано

4
Continuous serpentine plug-flow reactor for secondary tannery effluent treatment via electrochemical system at pilot scale DOI
Erika Pasciucco, Francesco Pasciucco, Renato Iannelli

и другие.

Journal of environmental chemical engineering, Год журнала: 2025, Номер unknown, С. 116399 - 116399

Опубликована: Март 1, 2025

Язык: Английский

Процитировано

0
Optimization of electro-Fenton process applied to the treatment of codfish brines in a context of industrial symbiosis DOI Creative Commons
Luana Sarinho, Pedro J. Carvalho,

Diana T. Patoilo

и другие.

Journal of Environmental Management, Год журнала: 2025, Номер 381, С. 125205 - 125205

Опубликована: Апрель 9, 2025

The ancient method of preserving fish by salting is still widely practiced but generates two challenging waste streams: contaminated salt (solid) and brine (liquid). Conventional treatment methods are ineffective in reducing the organic content due to its high (≅ 25-30 % wt. NaCl). Although advanced oxidation processes extensively used for treating certain wastewaters, their application real saline effluents near saturation, such as food industry brines, remains underexplored. This study optimized electro-Fenton (EF) process brines from codfish industry, aiming reuse treated pickling stage tannery thereby diverting streams environment disposal. A central composite experimental design response surface methodology were evaluate effects three EF operating variables: (i) current density (76-429 m-2), (ii) electrolysis time (1.0-10.0 min), (iii) hydrogen peroxide concentration ([H2O2], 50-201 mM), using iron electrodes. primary goal was maximize total carbon (TOC) removal brine. Additionally, specific roles reactive oxygen chlorine species responsible TOC (such HO•, Cl•, ClO, O2•-/HO2• HClO/OCl-) investigated scavengers. results revealed that O2•-, HO2• main active species. optimal conditions determined be a 275 m-2, 5.2 min, [H2O2] 91 mM, resulting 70 TOC. diluted ≅ 7.5-8.0 NaCl, tested hide trials assess impact on quality wet-blue leathers. Results showed did not affect leather quality; instead, they enhanced shrinkage temperature 103 °C 112 °C. increase broadens potential applications leather, making it suitable wider range markets products. Furthermore, chromium oxide fixed increased 4.1 5.3 %, industrial wastewater generated at end process. valorisation presents promising opportunity symbiosis between industries.

Язык: Английский

Процитировано

0