title: Phytoremediation of radiostrontium ((90)Sr) and radiocesium ((137)Cs) using giant milky weed (Calotropis gigantea R.Br.) plants.
abstract: Potential of plants to remove radionuclides/toxic elements from soils and solutions can be successfully applied for removal of important radionuclides such as strontium-90 ((90)Sr) and cesium-137 ((137)Cs). When uptake of (137)Cs and (90)Sr by Calotropis gigantea plants incubated in distilled water spiked with the radionuclides either alone or in combination was studied, it was found to have a high efficiency for the removal of (90)Sr, with 90% being removed from solutions (5 x 10(3)kBql(-1)) within 24h of incubation. However, in case of (137)Cs, about 44% could be removed from solutions (5 x 10(3)kBql(-1)) at the end of 168h of incubation. Accumulation of (90)Sr and (137)Cs was higher in roots compared to shoots. The plants could remediate both (90)Sr and (137)Cs when they were added together to the solution. When two months old plants were incubated in low level nuclear waste, 99% of activity disappeared at the end of 15 days. The present study suggests that C. gigantea could be used as a potential candidate plant for phytoremediation of (90)Sr and (137)Cs.
authors.affiliation: Nuclear Agriculture and Biotechnology Division, Bhabha Atomic Research Centre, Mumbai 400085, India. seapen@apsara.barc.ernet.in
authors.forename: Susan
authors.initials: S
authors.lastname: Eapen
authors.forename: Shraddha
authors.initials: S
authors.lastname: Singh
authors.forename: Vidya
authors.initials: V
authors.lastname: Thorat
authors.forename: C P
authors.initials: CP
authors.lastname: Kaushik
authors.forename: Kanwar
authors.initials: K
authors.lastname: Raj
authors.forename: S F
authors.initials: SF
authors.lastname: D'Souza
mesh_terms: D031107:Calotropis / Q000378:metabolism*; D002588:Cesium Radioisotopes / Q000378:metabolism*; D052918:Environmental Restoration and Remediation; D013326:Strontium Radioisotopes / Q000378:metabolism*
chemical_list: D002588:Cesium Radioisotopes; D013326:Strontium Radioisotopes