Vol. 5, Issue 6 (2020)
Assessment of cadmium and lead phytoextraction potential of selected weed plants
Author(s): Nayana KM, Akshaya Prakash C, Delse P Sebastian, Binu Thomas
Abstract: The phytoextraction potential of eight weed plants Ageratum conyzoides L., Alternanthera sessilis(L.)DC., Centrosema molle Mart. Ex Benth., Chromolaena odorata (L.) R. M. King & H. Rob, Mimosa pudica L., Synedrella nodiflora Gaertn. Tridax procumbens L. and Typhonium trilobatum (L.) Schott. Were assessed using atomic absorption spectrophotometry. Among the selected plants, Ageratum conyzoides L. accumulated the highest concentration of cadmium and Chromolaena odorata (L.) R.M.King & H.Rob. Accumulated the highest concentration of lead. Concentration of cadmium in acid dissolved dry plant material of A. conyzoides was 34.05 mg/kg and that of lead in C. odorata was 14.1 mg/kg. The study revealed that Ageratum conyzoides L. and Chromolaena odorata (L.) R. M. King & H.Rob. Were capable of removing the heavy metal contaminants, cadmium and lead respectively from polluted soil, suggesting their potential for the reclamation of lands contaminated with these heavy metals.