Removal of betamethasone sodium phosphate from wastewater using zinc oxide nanoparticles

Subject Areas : Journal of Physical & Theoretical Chemistry

M. Giahi ¹ , H. Taghavi ² , S. Habibi Habibi ³ , R. Sariri ⁴

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Received: 2015-05-31 Accepted : 2015-05-31 Published : 2011-11-01

Keywords: Photocatalytic degradation, betamethasone sodium phosphate, Wastewater, zinc oxide&#x0D, &#x0D, nanoparticles,

Abstract :

The photocatalytic degradation of betamethasone sodium phosphate was investigated in aqueoussuspensions of zinc oxide nanoparticular with diameter size 20 nm under a variety of conditions.Different parameters such as irradiation time, the amount catalyst (0.12-0.8 g LH), initialconcentration of drug (10-50 mgLjand initial pH values (ranging from 3 to II) were investigatedin the presence of various electron acceptors. It was observed that 0.44 gL-I of photocatalyst is theoptimum value for photocatalyst dosage. In the most favorite conditions, the degradationefficiency was obtained 30gL-I for betamethasone sodium phosphate. Finally, the kinetics processwas studied and the photodegradation rate of betamethasone sodium phosphate was found to obeypseudo-first-order kinetics equation represented by the Langmuir-Hinshelwood model.