Lead and Arsenic Uptake by Leafy Vegetables Grown on Contaminated Soils: Effects of Mineral and Organic Amendments

Water, Air, and Soil Pollution
Murray B McbrideSarah Wharton

Abstract

To assess strategies for mitigating Pb and As transfer into leafy vegetables from contaminated garden soils, we conducted greenhouse experiments using two field-contaminated soils amended with materials expected to reduce metal phytoavailability. Lettuce and mustard greens grown on these soils were analysed by ICP-MS, showing that some Pb and As transfer into the vegetables occurred from both soils tested, but plant Pb concentrations were highly variable among treatment replicates. Soil-to-plant transfer was more efficient for As than for Pb. Contamination of the leaves by soil particles probably accounted for most of the vegetable Pb, since plant Pb concentrations were correlated to plant tissue concentrations of the immobile soil elements Al and Fe. This correlation was not observed for vegetable As concentrations, evidence that most of the soil-to-plant transfer for this toxic metal occurred by root uptake and translocation into the above-ground tissues. A follow-up greenhouse experiment with lettuce on one of the two contaminated soils revealed a lower and less variable foliar Pb concentration than observed in the first experiment, with evidence of less soil particle contamination of the crop. This reduced transfer of Pb to...Continue Reading

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Citations

Mar 24, 2016·Environmental Monitoring and Assessment·Yiping TaiMurray B Mcbride
Aug 15, 2013·Environmental Science and Pollution Research International·Clare L S WisemanWilhelm Püttmann
Feb 24, 2016·Water, Air, and Soil Pollution·Murray B McBrideLydia G Marquez-Bravo
Feb 2, 2016·Journal of Environmental Quality·Sally L BrownGanga M Hettiarachchi
Nov 28, 2015·Environmental Science and Pollution Research International·Hua YangWenxiang He
Apr 6, 2017·Journal of Environmental Quality·John F ObryckiSteven W Culman
Apr 24, 2015·Environmental Toxicology and Chemistry·Changfeng DingXingxiang Wang
Mar 6, 2021·Journal of Environmental Management·Sara Perl EgendorfMurray B McBride
Oct 30, 2020·Environmental Pollution·Xinxin LiM B McBride
Nov 12, 2013·Ecotoxicology and Environmental Safety·K A FalinskiJ Peard

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