Transfer and bioaccumulation of 210Po from soil to water spinach (Ipomoea aquatica Forrsk.) in Vietnam
Van-Hao Duong, Thanh-Duong Nguyen, Anita Peka, Toth Bodrogi-Edit, Miklós Hegedűs, Tibor Kovács
Abstract
The water spinach (Ipomoea aquatica Forrsk.) is a common vegetable and a part of the staple diet in Vietnam. It has a well-known tendency for the high absorption of lead, including the radioactive isotope 210Pb. 210 Pb day to 210Po, which is one of the most toxic radioactive isotopes when ingested. Currently, there are few data available on the activity concentration or transfer parameters of water spinach grown in Vietnam. To provide this data, in this study, the 210Po activity concentrations in the soil, water and the roots, stems, and leaves of two types of spinach (grown in soil flooded with water and grown in normal soil) in Hanoi, Vietnam were determined by alpha spectrometry. The order of activity concentrations for water spinach grown in unflooded was Cstem < Cleaf < Croot, while for flooded Cstem ≈ Croot < Cleaf. The transfer factors followed a similar pattern.