Photocatalytic degradation of MB by TiO2: studies on recycle and reuse of photocatalyst and treated water for seed germination

Sonu, K and Puttaiah, SH and Raghavan, VS and Gorthi, SS (2021) Photocatalytic degradation of MB by TiO2: studies on recycle and reuse of photocatalyst and treated water for seed germination. In: Environmental Science and Pollution Research .

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Abstract

Photocatalysis is an effective way for treatment of wastewater and degradation of dyes. It is important to assess the reusability of photocatalyst and treated water after the treatment process. In this study, the photocatalytic activity of TiO2 (titanium dioxide) and TiO2-TMAOH (titanium dioxide-tetramethylammonium hydroxide) was analyzed for degradation of methylene blue dye. Enhanced degradation of methylene blue is observed while treated with TiO2-TMAOH with photodegradation efficiency (PDE) 80 within 20 min. A further study shows the reusability of TiO2 for degradation of dye for six cycles with a decrease in photodegradation efficiency from 90 (cycle-1) to 50 (cycle-2). Fourier transform infrared spectroscopy (FTIR), energy-dispersive X-ray spectroscopy (EDX), and cyclic voltammetry (CV) analysis were carried out to identify the functional groups in treated water, traces of titanium, and TMAOH, respectively. Seed germination of Vigna radiata using TiO2- and TiO2-TMAOH-treated water shows equivalent and consistent growth. Water quality analysis of treated water shows improved biochemical oxygen demand (BOD) level (1.5 mg L�1), which is suitable for reusability of water for many applications. The outcomes suggest treated water can be used for irrigation and plantation purposes. © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

Item Type:	Journal Article
Publication:	Environmental Science and Pollution Research
Publisher:	Springer Science and Business Media Deutschland GmbH
Additional Information:	The copyright for this article belongs to Springer Science and Business Media Deutschland GmbH
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	26 Jul 2021 10:55
Last Modified:	26 Jul 2021 10:55
URI:	http://eprints.iisc.ac.in/id/eprint/68967

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