Treatment of Sulfide Waste In Tannery Industry By Spinel Photocatalyst

International Journal of Civil Engineering

© 2021 by SSRG - IJCE Journal

Volume 8 Issue 1

Year of Publication : 2021

Authors : G. Preethi Sindhu, N.Valarmathy

10.14445/23488352/IJCE-V8I1P103

How to Cite?

G. Preethi Sindhu, N.Valarmathy, "Treatment of Sulfide Waste In Tannery Industry By Spinel Photocatalyst," SSRG International Journal of Civil Engineering, vol. 8,  no. 1, pp. 16-19, 2021. Crossref, https://doi.org/10.14445/23488352/IJCE-V8I1P103

Abstract:

The discharge of sulfide containing wastewater from tannery industries into natural streams and rivers poses several problems. Sulfides are toxic to aquatic life, damage the environment's aesthetic nature, and are difficult to treat by conventional methods. The present work investigated the degradation of sulfide by photocatalysis using ZnFe2O4 spinel catalyst. ZnFe2O4 was prepared by the chemical co-precipitation method, and their surface area, morphology, crystal structure, composition, and bandgap energy were analyzed by BET, SEM, XRD, EDS, and UV-DRS. The effect of operational variables such as control conditions, catalyst dosage, pH, irradiation time, catalyst reuse, and solar light intensity was investigated. The maximum degradation of sulfide was achieved at optimum conditions of catalyst dose of 240 mg/L, pH=9.8, and irradiation time =180 min for tannery wastewater, respectively. Kinetic analyses indicated that photocatalytic degradation rate followed the first-order model.

Keywords:

Sulphides, photocatalysis, ZnFe2O4, degradation

References:

[1] Borrell. L., Cervera-March. S., Gimenez J., Simarro. R., 'A Comparative study of CdS-based semiconductor photocatalysts for solar hydrogen production from sulfide + sulfite substrates,' Solar Energy Materials and Solar Cells, 25, 25-39.
[2] Boumaza.S.,Boujemaa.A., Bouguelia .A., Bouarab .R., Trari. M. ,Visible light induced hydrogen evolution on hetero-3.system ZnFe2O4/SrTiO3, Applied energy, 87 (2010) 2230-2236.
[3] system ZnFe2O4/SrTiO3’, Applied energy,87, 2230-2236.
[4] Gongxuan Lu and Shuben Li(1992), 'Hydrogen production by H2S photodecomposition on ZnFe2O4 catalyst', Int .J. Hydrogen
Energy,10, 767-770.
[5] Guoying Zhang, Chunsheng Li, Fangyi Cheng, Jun Chen, ZnFe2O4 tubes: Synthesis and application to gas sensors with high sensitivity and low energy consumption', Science Direct, 120(2006) 403-410.
[6] Haijiao Su, Liqiang Jing EL., Keying Shi, Changhao YaoE., Honggang Fu E.,Synthesis of large surface area LaFeO3 nanoparticles by SBA-16 template method as highly active, visible photocatalysts, J Nanopart Res,12, (2010) 967-974.
[7] Jianhui Yan, Haihua Yang, Yougen Tang, Zhouguang Lu, Shuqin Zheng, Maohai Yao, Yon Han(2009), Synthesis
[8] Photocatalytic activity of CuYyFe2-yO4- CuCO2O4 nanocomposites for H2 evolution under visible irradiation', Renewable Energy,34, 2399-2403.
[9] Karuppasamy Gurunathan, Jin-ook, Sang Mi Lee, Esakkiappan Subramanian, Sang-Jin Moon, Ki-Jeong Kong,Visible light., (2008).