Degradation of 2,4-Dinitrophenol by Photo Fenton Process

作者：Ahmadimoghaddam M^*; Mesdaghinia A; Naddafi K; Nasseri S; Mahvi A H; Vaezi F; Nabizadeh R

来源：Asian Journal of Chemistry, 2010, 22(2): 1009-1016.

• Advanced oxidation
• Degradation
• 2,4-Dinitrophenol
• Photo fenton

2,4-Dinitrophenol (2,4-DNP) is a priority pollutant that may enter environment from petrochemical, textile and dye stuff manufacturing. Due to ineffectiveness of biological processes in treatment of such a waste, advanced oxidation process (AOP) as a promising alternative has been introduced. Photo-Fenton process is an advanced oxidation process that we considered in this study. An 8.3 L cylindrical photo reactor equipped with 2 UV lamps, these two lamps with nominal power of 110 W emits radition at 254 nm. The photon flux of the reactor was 12 mu Einstein S(-1). The results show 100 % disappearance of the 2,4-DNP during 40 min reaction time was obtained when H(2)O(2) concentration of 75 mg L(-1) was used. The elimination of all 2,4-DNP was combined with 21 % TOC removal. Also raising the initial H(2)O(2) concentration direct to more oxidation of the contained organic matter. 50 % of COD conversion was obtained when 75 mg L(-1) H(2)O(2) was used, while it reached to 61 % when H(2)O(2) was increased to 100 mg L(-1). Increasing the initial Fe(2+) from 45 to 75 mg L(-1) direct to increase 2,4-DNP degradation from 54 up to 87 %. However, it was noticed that, the reaction reach a concentration at which catalytic reaction effect is weak and addition of the iron salt above this point (75 mg L(-1)) did not improve the degradation, but rather perceptible decrease in the degradation rate occurred.

• 出版日期2010-2