Conventional and novel techniques for the determination of Hg uptake by lettuce in amended agricultural peri-urban soils
dc.contributor.author
dc.date.accessioned
2019-10-09T06:36:02Z
dc.date.available
2019-10-09T06:36:02Z
dc.date.issued
2019-06-10
dc.identifier.issn
0048-9697
dc.identifier.uri
dc.description.abstract
Peri-urban agriculture provides environmental benefits to the nearby urban areas. However, domestic and industrial infrastructures can be sources of pollution that can affect agricultural production. In this work, the diffusive gradient in thin film (DGT) technique was used to assess the bioavailability of mercury (Hg) in organic-amended agricultural soils, and uptake by lettuce. Two different amendments were studied individually in three different sets using a wood-based biochar at two rates (3% and 6%, w/w), and compost at one rate (30% w/w). The effect of the amendments on Hg bioavailability, mobility and uptake was investigated by means of both DGT analyses and accumulation of Hg by lettuce. DGT manufactured in-house devices with polyacrylamide gel using both open and restricted diffusive layers (ODL and RDL, respectively) were used to determine organic and inorganic Hg labile species in soils, respectively. The Hg concentration in lettuce leaves and roots were analyzed and compared with DGT measurements to predict the uptake of Hg from the different organic-amended soils and the non-amended soils. Results show that the application of biochar reduces the bioavailability of Hg in soil and, in consequence, the Hg uptake by lettuce. Inorganic Hg species were predominant in all the different sets of the experiment (62–97%), although the addition of the different amendments reduced the free ionic species in soil
dc.description.sponsorship
The authors gratefully acknowledge the financial support of the Spanish Ministry of Economy, Industry, and Competitiveness (MEIC) through Project AGL2017-89518-R and CTM2016-78798-C2-2-P (AEI/FEDER/UE)
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
dc.relation
MINECO/PE 2016-2018/CTM2016-78798-C2-2-P
dc.relation.isformatof
Versió postprint del document publicat a: https://doi.org/10.1016/ j.scitotenv.2019.02.244
dc.relation.ispartof
© Science of The Total Environment, 2019, vol. 668, p. 40-46
dc.relation.ispartofseries
Articles publicats (D-Q)
dc.rights
Reconeixement-NoComercial-SenseObraDerivada 4.0 Internacional
dc.rights.uri
dc.subject
dc.title
Conventional and novel techniques for the determination of Hg uptake by lettuce in amended agricultural peri-urban soils
dc.type
info:eu-repo/semantics/article
dc.rights.accessRights
info:eu-repo/semantics/openAccess
dc.date.embargoEndDate
info:eu-repo/date/embargoEnd/2021-06-10
dc.type.version
info:eu-repo/semantics/acceptedVersion
dc.identifier.doi
dc.contributor.funder
dc.type.peerreviewed
peer-reviewed