title: Solar light induced and TiO2 assisted degradation of textile dye reactive blue 4.
abstract: Aqueous solutions of reactive blue 4 textile dye are totally mineralised when irradiated with TiO2 photocatalyst. A solution containing 4 x 10(-4) M dye was completely degraded in 24 h irradiation time. The intensity of the solar light was measured using Lux meter. The results showed that the dye molecules were completely degraded to CO2, SO4(2-), NO3-, NH4+ and H2O under solar irradiation. The addition of hydrogen peroxide and potassium persulphate influenced the photodegradation efficiency. The rapidity of photodegradation of dye intermediates were observed in the presence of hydrogen peroxide than in its absence. The auxiliary chemicals such as sodium carbonate and sodium chloride substantially affected the photodegradation efficiency. High performance liquid chromatography and chemical oxygen demand were used to study the mineralisation and degradation of the dye respectively. It is concluded that solar light induced degradation of textile dye in wastewater is a viable technique for wastewater treatment.
authors.affiliation: Department of Environmental Science and Engineering, Kwangju Institute of Science and Technology (K-JIST), South Korea.
authors.forename: B
authors.initials: B
authors.lastname: Neppolian
authors.forename: H C
authors.initials: HC
authors.lastname: Choi
authors.forename: S
authors.initials: S
authors.lastname: Sakthivel
authors.forename: B
authors.initials: B
authors.lastname: Arabindoo
authors.forename: V
authors.initials: V
authors.lastname: Murugesan
mesh_terms: D002851:Chromatography, High Pressure Liquid; D004396:Coloring Agents / Q000737:chemistry*; D008027:Light; D010777:Photochemistry; D013783:Textile Industry; D014025:Titanium / Q000737:chemistry*; D014227:Triazines / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods; D018508:Water Purification / Q000379:methods*
chemical_list: D004396:Coloring Agents; D014227:Triazines; C036598:procion blue MX-R; C009495:titanium dioxide; D014025:Titanium