Abstract:
Along with the modern lifestyles of the developing society, the contamination of the domestic
water resrvours is being a growing threat. Advanced oxidation processes (AOP) involve a highly
competitive and promising technology for the treatment of wastewaters containing non-easily
removable compounds such as persistent organic pollutants (POP) that are known for their bioaccumulative
and recalcitrant natures that require more effective treatment methods. Crystal
Violet is a mutagen and a potent carcinogen. It can prevent light penetration and hinder the
photosynthesis process.in the aquatic environment. The main objective of this research is to
investigate the treatment of wastewater containing Crystal Violet dye by heterogeneous Fenton
oxidation process using Fe(II) impregnated sawdust as a catalyst. Fe-sawdust catalyst was
prepared and successfully used in the removal of Crystal Violet in synthetic wastewater. The
optimum heterogeneous Fenton reaction conditions for the decolourization of Crystal Violet
were found as 0.3 g of catalytic amount with an initial pH value of 3.0 at 3 mM concentration
of H2O2, 50 ppm initial concentration of Crystal Violet, and at a stirring rate of 600 rpm. A 96%
decoloration efficiency was achieved under these reaction conditions. An iron loading
percentage of 0.81% on sawdust was achieved in the catalytic preparation. The re-usage study
revealed productive decoloration efficiency up to five cycles. In conclusion, cost-effective Fesawdust
catalyst can potentially be an effective catalyst for the treatment of Crystal Violet in
wastewater.
