Stable Carbon Isotope Fractionation during Sonolysis of Di-n-butyl Phthalate

Abstract

Abstract. The degradation of di-n-butyl phthalate (DBP) at an ultrasonic frequency of 80 kHz was investigated. Ultrasonic treatment was found capable of removing DBP in water. TOC analysis showed that DBP could not be completely mineralized within radiation time of 25 h. Stable carbon isotopic fractionation in the residual DBP was evaluated. An observed 13 C-enrichment, with a δ 13 C shift of δ 13 C=1.3±0.19‰ (f=0.07), provided a direct evidence for sonolysis of DBP.