Degradation of a Pigment Red 238 using UV,UV/H<sub>2</sub>O<sub>2</sub>, UV/H<sub>2</sub>O<sub>2</sub>/SnO<sub>2</sub> and Fenton Processes
Tanveer Hussain Bokhari, Ghulam Mustafa, Noshaba Ahmed, Muhammad Usman, Nadia Akram, Atta ul Haq, Mahwish Salman, Saima Naz, Foziah F. Al-Fawzan, Siham A. Alissa, Munawar Iqbal, Arif Nazir
Abstract
This study implicates the degradation of pigment red 238 (PR238) from aqueous solution employing photocatalytic processes. The procedure was carried out under UV radiation, SnO 2 and H 2 O 2 as well as Fenton process. The influence of process variables viz., pigment concentration (50-150 ppm), amount of catalyst (0.1-0.3 g/L), H 2 O 2 concentration (0.3-0.9 mL), UV irradiation time (30-60 min) and pH (3-9) were studied for the removal of PR238. The experiments were conducted by exposing aqueous solutions of PR238 having photocatalyst with UV light and effect of process variables such as pH, concentration of pigment, concentration of H 2 O 2 and amount of catalyst was investigated. The degradation of >90% was achieved with Fenton process, whereas H 2 O 2 /UV and UV/H 2 O 2 /SnO 2 furnished up to 78% and 89.6% PR238 removal, respectively. From results, it was concluded that the Fenton process is highly efficient for the removal of PR238, which can be employed for the removal of dyes form effluents .