Photocatalytic degradation and removal of heavy metals in pharmaceutical waste by selenium doped ZnO Nano composite semiconductor

Shruthi, L. and Shyni, and Jagadish, K. and Srikantaswamy, S. and Abhilash, M. R. (2016) Photocatalytic degradation and removal of heavy metals in pharmaceutical waste by selenium doped ZnO Nano composite semiconductor. Journal for Research, 2 (5). pp. 47-54. ISSN 2395-7549

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Abstract

In recent years pharmaceutical wastes (PW) deposal of has become a major difficulty for the environment. Therefore, pharmaceutical waste removal is very necessary before its discharge from the pharma industry. The separation of drugs containing organic compounds in wastewater streams is failed by convectional and biological treatments. Thus, the reduction of harmful effects of pharmaceutical compounds is possible by heterogeneous photocatalysis process. Herein we reported the degradation of pharmaceutical concentration in pharmaceutical waste by heterogeneous photocatalyst ZnO doped with Selenium prepared by cost effective hydrothermal method. In addition the heavy metals in pharmaceutical waste were also removed by ZnO/Se nanocomposite. The average band gap of nanocomposite (~2.5 eV) increase the photocatalytic activity and degrade the organic compounds in pharmaceutical waste. The heavy metals get adsorbed on the high surface area of nanocomposite and removed completely by filtration method. The Selenium doped ZnO photocatalyst semiconductor was characterized by scanning electron microscopy coupled with energy dispersive X-ray spectroscopy (SEM/EDAX) and also the characteristic crystalline forms of ZnO/Se nanocomposite was confirmed by XRD. The functional groups and particle size distribution of ZnO/Se nanocomposite was characterized by FTIR and DLS respectively. The reduction of organic compounds in the pharmaceutical waste was confirmed by COD analysis and removal of heavy metals was performed by AAS analysis.

Item Type: Article
Subjects: Physical Sciences > Environmental Science
Divisions: PG Campuses > Manasagangotri, Mysore > Environmental Science
Depositing User: Praveen Kumari B.L
Date Deposited: 15 Nov 2016 10:10
Last Modified: 15 Nov 2016 10:10
URI: http://eprints.uni-mysore.ac.in/id/eprint/19002

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