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Synthesis of titanium doped hydroxyapatite using waste marble powder for the degradation of Congo Red dye in wastewater
Journal
Materials Today: Proceedings
Date Issued
2022-01-01
Author(s)
Khan, Arshia
Bhoi, Rohidas
Saharan, Virendra Kumar
George, Suja
Abstract
Owing to the fact that affinity of Congo Red dye (CR) is higher towards the metal–organic calcium based frame work rather than metal-oxide framework this study presents synthesis of titanium doped hydroxyapatite (HAP) for photocatalytic degradation of CR dye. The photocatalysis process is an effective method for successful generation of hydroxyl radicals ([rad]OH) which can successfully react with non-degradable organic matter and can easily mineralise biorefractory pollutant wastewater. The permissible limit of calcium in treated water is much higher than other photocatalysts materials such as Ce, Sm and Bi and is environmental friendly, titanium was doped into calcium rich hydroxyapatite to prepare photocatalyst derived from waste marble powder with an optimized ratio of Ti:Ca. The environmentally friendly green titanium doped HAP photocatalyst (WMPHAP-Ti) successfully degrades CR in aqueous solution and process variables such as pH, reaction time, dose of catalyst and CR concentration were optimised by one factor at a time analysis. It was observed that 92.86% degradation of 10 mg/L of CR solution was achieved at conditions of pH 10 and UV irradiation of 90 min using 0.5 g/L dosage of WMPHAP-Ti. The degradation kinetic rate followed second order reaction rate with rate 0.025 per mole per minute.
Volume
57
Subjects