Qahramanov S. G. RussiaSaratovSaratov State University , 83, Astrakhanskaya str., Saratov, 410012, Russia torgaschkova88@mail.ru Author's articles Assessment of Self-purification of the Volga River Near the City of Saratov The Impact of Aquatic Environments with Dissolved Synthetic Surface-Active Substances on Aquatic Plants