TI - Treatability of landfill leachate pre-treated with a two-stage biological treatment process to the level of receiving environment standards by using the fenton process AU - KURT, U. AU - APAYDIN, Ã. AU - AVÅžAR, Y. AU - GÖNÜLLÜ, M.T. SO - Sigma Journal of Engineering and Natural Sciences 2025;43:2152-2163. DO - 10.14744/sigma.2025.1914