Abstract
Four types of solid waste were sampled from two municipal solid waste landfill sites (A and B-landfill). By sorption experiment and biodegradation experiment in anaerobic condition, distribution coefficient Kp, leachable amount from waste material X0, and decomposition rate k were determined for EDCs (endocrine disrupting chemicals). Using the obtained parameters, EDCs concentration in leachate from A and B-landfill was estimated. Consequently, the following results were obtained.(1) Determined parameters are Kp; 101-103 for alkylphenols (APs), 100-101 for bisphenol A (BPA), 101-104L/kg for phthalic acid esters (PAEs). X0;<102-103 for APs and BPA, 102-104μg/kg for PAEs. k; 10-4-10-2 for APs, <10-4-10-3 for BPA, 10-2 for DEP, <10-4-10-3 day-1 for DBP, BBP and DEHP.(2) Using Kp, X0 and k, concentration of EDCs in leachate of A and B-landfill was calculated and compared with the experimental value. The estimated value was influenced by k value. The estimated value approximately agreed with experimental value. Due to high initial concentration of BPA and low decomposition rate of DBP and DEHP, more than several decades will be needed for their concentration in leachate to reduce lower than environmental level.
