Purification of river waters using plant bioindicators. - Zhumakhanova, Rosa; Kylyshbayeva, Gulnar; Mussabekov, Aidos; Adyrbekova, Gulnar; Abduraimova, Nyshangul; Berdaliyeva, Akmaral; Kemelbekova, Gulnar; Yessentureyeva, Gulmira (Caspian Journal of Environmental Sciences, 2026)