RETRACTED: A study of Zinc ions adsorption by native and chemically modified leaves of earleaf acacia (Acacia auriculiformis)Duc Anh Nguyen, Ildar Shaikhiev and Natalia KraysmanE3S Web Conf., 420 (2023) 01003DOI: https://doi.org/10.1051/e3sconf/202342001003