[Bidens maximowicziana's adsorption ability and remediation potential to lead in soils].
Bidens maximowicziana's adsorption ability and remediation potential to lead were studied. The results show: (1) The Bidens maximowicziana has a strong adsorption to lead, the concentration of lead in plants increased linearly with the increase of lead concentration in soil. Then maximum concentration was 1509.3 mg x kg(-1) in roots and 2164.7 mg x kg(-1) in shoots when lead concentration in soil was 2000 mg x L(-1); (2) The lead concentration distribution order in the Bidens maximorwicziana is: leaf>stem>root>seed, which indicate that Bidens maximowicziana has a strong ability to transfer lead; (3) Uptaking ability differes in different vegetal periods. Maximum lead uptaking rate occured in the period of blooming for 40-60 days, in which daily uptake capacity was 15.81 mg x (kg x d)(-1) in roots and 19.83 mg x (kg x d)(-1) in shoots respectively. It can be concluded that Bidens maximowicziana appeares to be a moderate Pb accumulator making it suitable for phytoremediation of Pb contaminated soil.
Wang
Hong-qi
HQ
State Key Laboratory of Environmental Simulation and Pollution Control, Institute of Environmental, Beijing Normal University, Beijing 100875, China.
Li
Hua
H
Lu
Si-jin
SJ
D031176:Bidens / Q000378:metabolism*; D001673:Biodegradation, Environmental; D004787:Environmental Pollution / Q000517:prevention & control; D007854:Lead / Q000378:metabolism*; D012987:Soil / Q000032:analysis*; D012989:Soil Pollutants / Q000378:metabolism*
D012987:Soil; D012989:Soil Pollutants; D007854:Lead