1. Effects of exogenous iron on lead accumulation in Typha latifolia from a lead-contaminated soil.
- Author
-
ZHONG Shun-qing and XU Jian-ming
- Abstract
A pot experiment was conducted to study the effects of adding 100 and 500 mg·kg
-1 of exogenous iron (Fe) on the lead (Pb) accumulation in Typha latifolia growing on a soil with 0, 100, 500 and 1000 mg·kg-1 of Pb, respectively. In treatment 500 mg Fe·kg-1 , the Pb concentration in T. latifolia shoots and roots was higher, compared with that in treatment 100 mg Fe·kg-1 . When the soil Pb concentration was 1000 mg·kg-1 , the Pb concentration in T. latifolia shoots and roots in treatment 500 mg Fe·kg-1 increased by 33. 7% and 50. 5%, respectively, compared with that in treatment 100 mg Fe·kg-1 . The exchangeable Pb concentration in rhizosphere soil was 77. 0%-1 14. 6% higher in treatment 500 mg Fe·kg-1 than in treatment 100 mg Fe·kg-1 . When the soil Pb concentration was 0, 100 and 1000 mg·kg-1 , the root dry mass in treatment 500 mg Fe · kg-1 had a significant decrease, compared with that in treatment 100 mg Fe·kg-1 . It was suggested that adding appropriate amount of Fe to Pb-contaminated wetland soil could increase the availability of soil Pb and improve the Pb accumulation in plants. [ABSTRACT FROM AUTHOR]- Published
- 2013