Jornal de Biorremediação e Biodegradação

Abstrato

Phytoextraction Ability of Amaranthus mangostanus L. from Contaminated Soils with Cs or Sr

Wang Dan, Zhang Xiaoxue, Luo Xuegang and Tang Yunlai

The uptake, distribution, and accumulation of 133Cs and 88Sr with its antioxidant responses in Amaranthus mangostanus L plants was studied during cultivation in outdoor potted-soil. The results showed that the uptake capacity of Amaranthus for 133Cs was higher than that for 88Sr at the same molarity treatment where the concentration of 88Sr or 133Cs in the soil was from 0.1 mmol/kg to 5 mmol/kg. The maximum 133Cs and 88Sr uptake of total plant was 3535.2 mg/kg dw and 639.4 mg/kg, respectively. Amaranth had much stronger capacity for absorbing 133Cs than for 88Sr. The 133Cs BCF of amaranth above-ground part and its total plant at the different concentrtion treatments in the soil was higher than for the 88Sr BCF except at the 0.1 mmol/kg treatments. The TF was lower in the lower concentration (0.1 and 0.5 mmol/kg) than that in the higher concentration of 133Cs and 88Sr in the soil (1 and 5 mmol/ kg). Amaranth could be used as a potential candidate plant for phytoremediation of 137Cs and 90Sr. The MDA content under 88Sr stress was higher than that under 133Cs stress, and the activities of CAT under 88Sr stress were less than that under 133Cs stress.