Immobilized titania nanophotocatalysis: Degradation, modeling and toxicity reduction of agricultural pollutants

Nanoscale TiO2 films and their application in remediation of organic pollutants

“…TiO 2 is chemically inert, corrosion resistant, relatively non-toxic, inexpensive, and does not contribute any chemical or hazardous waste to the environment [3][4][5]. Consequently, it has been widely used in academic research and a variety of commercial applications, ranging from anti-fogging paints [6], photovoltaics (such as solar cells) [7,8], sensing applications [9,10] and photocatalysis of organic pollutants [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26].…”

An overview on the advanced oxidation processes applied for the treatment of water pollutants defined in the recently launched Directive 2013/39/EU

“…Alachlor removal depended on both the irradiation time and the H2O2 concentration in a batch photocatalytic reactor where TiO2 nanoparticles were immobilized (Mahmoodi and Arami, 2010), while its poor degradation was obtained with an organic 2,4,6-triphenylthiapyrylium photocatalyst in a solar simulator (Gomis et al, 2012). 4-tert-octylphenol degradation was tested using a TiO2 precursor sol coated on the inner wall of a photoreactor at λ = 254 nm (Wu et al, 2012) as well as a NaBiO3 photocatalyst under visible radiation (Chang et al, 2010), in both cases up to 90% of the pol-lutant removal being obtained.…”

Pesticides and Herbicides

“…showed that total organic carbon removal and dechlorination decreased with increasing silica gel content from 0 to 1.0 g/L. The degradation of alachlor and fenitrothion using immobilized titania nanophotocatalysis was studied by Mahmoodi and Arami (2010). It was shown that formate, acetate, and oxalate were the major initial oxidation products, which were then slowly oxidized to carbon dioxide, along with the production of nitrate and sulfate from the photocatalytic mineralization of alachlor and fenitrothion.…”