Decomposition of 2-naphthalenesulfonate in aqueous solution by ozonation with UV radiation

Decomposition of 2-naphthalenesulfonate in electroplating solution by ozonation with UV radiation

“…On the other hand, the insignificant effect of UV radiation on the decomposition of 2-NS is due to the high reactivity of 2-NS toward ozone. Similar phenomena were also observed during the ozonation of 2-NS in the aqueous solution [5]. Furthermore, the decomposition rates of 2-NS and TOC via sole ozonation in the electroplating solution seems to be faster in comparison with those in the aqueous solution.…”

“…7 presents the variation of ORP of liquid with η TOC . The value of ORP can be used as a supplementary ozonation index of ozonation system [5,18]. The experimental ORP data of the present study were further used to plot the average and smooth curve in Fig.…”

“…The decrease of decomposition extent of 2-NS with ozonation time also counts for the generation of byproducts, which are also competitors for oxidation. The initial attacks of ozone on 2-NS may be proceeded via (1) an ozone dipolar cycloaddition on the 1,2 bond or (2) an electrophilic substitution of ozone on carbon 1 [5]. Fig.…”

“…Recently, Chen et al [5] investigated the decomposition of 2-NS in the aqueous solution by ozonation with ultraviolet (UV) radiation. Their results indicated that the combined process of ozonation with UV radiation is an effective way for the removal of 2-NS in the aqueous solution.…”

Photoelectrochemical treatment of 1-amino-8-hydroxynaphthalene-3,6-disulphonic acid at electrode covered with TiO/RuO

“…In the case of treatment of 2-naphthalenesulphonate sodium at the concentration of 26 mg/l, application of ozonation results in 15% decrease in TOC. A combination of ozonation with UV radiation leads to almost total mineralization of the substrate [7]. Application of electrochemical method and coagulation results in a decrease of TOC by 90% [5].…”