EXPERIMENTAL STUDY ON THE ABSORPTION OF METHANETHIOL BY LEAD ACETATE SOLUTION AND DETERMINATION OF MACROSCOPIC ORDER OF THE REACTION

摘要

Biological filtration is widely used to deodorize in wastewater treatment plants. This technique can efficiently remove soluble odor-causing substances but minimally affect insoluble odor-causing substances, such as methanethiol (MT) and dimethyl sulfide. In this paper, the absorption effect of me-thanethiol, as a water-insolubility odor, by lead acetate solution was studied, and the process of reaction was analyzed. Results showed that when the concentration of the lead acetate concentration was only 50 g/L, the MT removal efficiency was 56.25, and the MT removal rate was as high as 85.94, when the concentration of lead acetate((CH3COO)2Pb) solution was 200 g/L, which showed that the absorption effect was desirable and stable. The macroscopic reaction order of (CH3COO)2Pb and MT is 0.5 and 1.5, respectively, and the total macroscopic reaction order is 2.0 in the deodorization tower. The transformed reaction rate constant (众 1) was 1935 mol1 Ls1. These findings provided a reference for engineering design and operation of MT removal by lead acetate solution.