Yapa, P.A.J.2010-07-062010-07-061992Vidurava, 14(2):p.1-3https://dl.nsf.gov.lk/handle/1/5568Eichhornia crassipesAquatic weedsMetalsPollutantsWater purificationBotanyWater hyacinth - the silent purifier of nature's water bodiesArticle