The study on UV-degradation dynamics of 2,3,7,8-tetrachlorodibenzo-p-dioxin and its analogues

Article abstract of DOI:10.1016/0045-6535(96)00150-6

A study on UV-degradation dynamics of 2,3,7,8-tetrachlorodibenzo-p-dioxin (2,3,7,8-TCDD) and its analogues 2,3,7,8-tetrachlorophenoxthin (2,3,7,8-TCPT) and 2,3,7,8-tetrachlorothianthrene (2,3,7,8-TCTR) in solvents CHCl₃ and CCl₄ was completed. The results indicated that they were degradated by UV in different way in different solvent. The degradation of 2,3,7,8-TCDD and 2,3,7,8-TCPT are pseudo-first-order reactions in CHCl₃, but complex reactions in CCl₄; the degradation of 2,3,7,8-TCTR is a zero-order reaction in CHCl₃, but a pseudo-first-order reaction in CCl₄. All of the three compounds disappeared in CCl₄ much faster than in CHCl₃ under 254 nm UV-irradiation.