Bioavailability assessment and accumulation by five garden flower species grown in artificially cadmium-contaminated soils
Journal
International Journal of Phytoremediation
Journal Volume
12
Journal Issue
5
Pages
454-467
Date Issued
2010
Author(s)
Abstract
Many studies have been conducted on phytoextraction; however, non-native hyperaccumulator species are not suitable for the natural environment of Taiwan in many cases. Drawing upon previous results, the growth and heavy metal accumulation in artificially cadmium-contaminated soils were compared for five local garden flower species. The treatments included a control (CK), 9.73 ± 0.05 mg kg-1 (Cd-10), and 17.6 ± 0.8 mg kg-1 (Cd-20). All plants were harvested at 35 days after transplanting and analyzed for Cd content. Cd accumulation in the shoot of French marigold (Tagetes patula L.) and Impatiens (Impatiens walleriana Hook. f.) grown in Cd-20 treatment were 66.3 ± 6.5 and 100 ± 11 mg kg-1, which equated to a removal of 0.80 ± 0.11 and 0.60 ± 0.37 mg Cd plant-1, respectively. The maximum Cd accumulation of Impatiens reached the threshold value (100 mg kg-1) characteristic of a Cd hyperaccumulator and its bioconcentration factor (BCF) and translocation factor (TF) were greater than one. Impatiens therefore has the potential to hyperaccumulate Cd from Cd-contaminated soils. With the exception of Garden verbena, significant relationships were found between Cd concentrations in soil extracted by 0.05 M EDTA, 0.005 M DTPA, and 0.01 M CaCl2 and the concentration of Cd in the shoots of the tested garden flowers. © Taylor & Francis Group, LLC.
Subjects
Bioavailability; Cadmium; Hyperaccumulator
SDGs
Other Subjects
cadmium; heavy metal; article; bioavailability; flower; Impatiens; metabolism; plant; plant root; pollution; Salvia; Salvia officinalis; seedling; soil pollutant; Biological Availability; Cadmium; Environmental Pollution; Flowers; Impatiens; Metals, Heavy; Plant Roots; Plant Shoots; Salvia; Salvia officinalis; Seedling; Soil Pollutants; Impatiens; Impatiens walleriana; Tagetes patula; Verbena x hybrida; Verbenaceae
Type
journal article