Photochemical oxidation of short-chain ...



Title Photochemical oxidation of short-chain polychlorinated n-alkane mixtures using H2O2/UV and the photo-Fenton reaction.
Author(s) Ken J. Friesen, Taha M. El-Morsi, Alaa S. Abd-El-Aziz
Journal International Journal of Photoenergy,
Date 2004
Volume 6
Issue 2
Start page 81
End page 88
Abstract The photochem. oxidn. of short-chain polychlorinated n-alkane (PCA) mixts. were studied using H2O2/UV and modified photo-Fenton conditions (Fe3+/H2O2/UV) in both Milli-Q and lake water. All PCA mixts., including chlorinated (Cl5 to Cl8) decanes, undecanes, dodecanes and tridecanes degraded in 0.02M H2O2/UV at pH 2.8 in pure water, with 80 ± 4% disappearance after 3 h of irradn. using a 300. nm light source. Degrdn. was somewhat enhanced under similar conditions but in natural water. The modified photo-Fenton system was more effective in degrading PCAs, with 72% and 80% disappearance of chlorinated decanes in 4 S min of irradn. in pure and natural water, resp. Carbon chain-length had minimal effect on degrdn. rates; however, increased degree of chlorination (from Cl5 to Cl8) resulted in slower initial degrdn. rates and less complete conversion after 3 h of irradn. Three hours of irradn. in natural water/H2O2/UV resulted in 95% degrdn. of parent PCAs accompanied by 93% release of chloride ion. Quant. dechlorination, which may be indicative of complete mineralization, suggests that this is an effective water remediation technique for PCAs.
DOI 10.1155/S1110662X04000121

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