Journal
JOURNAL OF PLANT NUTRITION
Volume 38, Issue 4, Pages 509-525Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/01904167.2014.934477
Keywords
orchard; lead-arsenate; carrots; lead; arsenic
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Concerns have been raised of possible human food chain transfer of lead and arsenic from crops grown on orchard soils with histories of lead arsenate use. The objective of this study was to determine arsenic and lead uptake by three cultivars of carrots grown on four orchard soils with histories of lead arsenate use. Total concentrations of arsenic and lead in these soils ranged from 93 to 291 and from 350 to 961 mg kg(-1) for arsenic and lead, respectively. Arsenic in peeled carrot ranged from 0.38 to 1.64 mg kg(-1), while lead ranged from 2.67 to 7.3 mg kg(-1) dry weight. This study demonstrated that carrots will accumulate arsenic and lead in the root, which may become a human health risk when consumed. However, further studies are needed to determine what fraction of arsenic and lead in these carrots are bioavailable to humans when consumed.
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