Direct Photolysis of Chlorophenols In Aqueous Solution By Ultraviolet Excilamps

Journal Article · Thu Aug 25 04:00:00 EDT 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3627208· OSTI ID:21608265

Matafonova, Galina; Philippova, Natalya; Batoev, Valeriy ^[1]

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1. Baikal Institute of Nature Management SB RAS, 6 Sakhyanova St., Ulan-Ude, 670047 (Russian Federation)

The direct photolysis of 2-chlorophenol (2-CP), 4-chlorophenol (4-CP) and 2,4-dichlorophenol (2,4-DCP) in model aqueous solution was studied using UV XeBr (282 nm) and KrCl (222 nm) excilamps. The highest pseudo-first order rate constants and quantum yields were found for molecular form of 4-CP (at pH 2 and 5.7) and anionic forms of 2-CP and 2,4-DCP (at pH 11) when irradiated by XeBr excilamp. The maximum removal efficiency of molecular form of 2-CP and 2,4-DCP with the lowest UV dose of absorbed energy was observed using KrCl excilamp. On the contrary, the XeBr excilamp required the lowest dose ({approx}2 J{center_dot}cm{sup -2}) for complete degradation of molecular 4-CP and anionic 2-CP. The highest removal efficiency of anionic form of 4-CP (65%) was achieved when using KrCl excilamp.

• OSTI ID: 21608265
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1373; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
AQUEOUS SOLUTIONS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DATA ANALYSIS
DECOMPOSITION
DISPERSIONS
DOSES
EFFICIENCY
ELECTROMAGNETIC RADIATION
HOMOGENEOUS MIXTURES
KINETICS
MIXTURES
OXIDATION
PH VALUE
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
RADIATIONS
REACTION KINETICS
REMOVAL
SOLUTIONS
ULTRAVIOLET RADIATION