Reaction rates and intermediates of chlorinated organic compounds in water and soil

Degradation reactions of thirteen chlorinated organic compounds were investigated in a water system and a water-soil system. Three compounds were degraded following the first order rate equation regardless of pH, and five compounds were degraded following the second order rate equation with a concentration of hydroxide ion in alkaline solution.The reaction rate constants and the activation energies of the reactions were obtained, and the intermediates were determined quantitatively for the eight compounds.From the result of the degradation of 1,1,1-trichloroethane in the water-soil system, it was found that 1,1,1 trichloroethane did not react on the soil surface and only reacted in the water phase.