@article{fdi:010086873,
  title = {{F}ate of antimony contamination generated by road traffic - {A} focus on {S}b geochemistry and speciation in stormwater ponds},
  author = {{P}hilippe, {M}. and {L}e {P}ape, {P}. and {R}esongles, {E}l{\'e}onore and {L}androt, {G}. and {F}reydier, {R}. and {B}ordier, {L}. and {B}aptiste, {B}. and {D}elbes, {L}. and {B}aya, {C}. and {C}asiot, {C}. and {A}yrault, {S}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A}lthough antimony ({S}b) contamination has been documented in urban areas, knowledge gaps remain concerning the contributions of the different sources to the {S}b urban biogeochemical cycle, including non-exhaust road traffic emissions, urban materials leaching/erosion and waste incineration. {A}dditionally, details are lacking about {S}b chemical forms involved in urban soils, sediments and water bodies. {H}ere, with the aim to document the fate of metallic contaminants emitted through non-exhaust traffic emissions in urban aquatic systems, we studied trace element contamination, with a particular focus on {S}b geochemistry, in three highway stormwater pond systems, standing as models of surface environments receiving road-water runoff. {I}n all systems, differ-entiated on the basis of lead isotopic signatures, {S}b shows the higher enrichment factor with respect to the geochemical background, up to 130, compared to other traffic-related inorganic contaminants ({C}o, {C}r, {N}i, {C}u, {Z}n, {C}d, {P}b). {M}easurements of {S}b isotopic composition (delta 123{S}b) performed on solid samples, including air-exposed dusts and underwater sediments, show an average signature of 0.07 +/- 0.05%o (n = 25, all sites), close to the delta 123{S}b value measured previously in certified reference material of road dust ({BCR} 723, delta 123{S}b = 0.03 +/- 0.05%o). {M}oreover, a fractionation of {S}b isotopes is observed between solid and dissolved phases in one sample, which might result from {S}b (bio)reduction and/or adsorption processes. {SEM}-{EDXS} investigations show the presence of discrete submicrometric particles concentrating {S}b in all the systems, interpreted as friction residues of {S}b-containing brake pads. {S}b solid speciation determined by linear combination fitting of {X}-{R}ay {A}bsorption {N}ear {E}dge {S}tructure ({XANES}) spectra at the {S}b {K}-edge shows an important spatial variability in the ponds, with {S}b chemical forms likely driven by local redox conditions: "dry" samples exposed to air exhibited contributions from {S}b({V})-{O} (52% to 100%) and {S}b({III})-{O} (<10% to 48%) species whereas only underwater samples, representative of suboxic/anoxic conditions, showed an additional contribution from {S}b({III})-{S} (41% to 80%) species. {A}lto-gether, these results confirm the traffic emission as a specific source of {S}b emission in surface environments. {T}he spatial variations of {S}b speciation observed along the road-to-pond continuum likely reflect a high geochemical reactivity, which could have important implications on {S}b transfer properties in (sub)surface hydrosystems.},
  keywords = {{A}ntimony ; {R}oad traffic contamination ; {S}tormwater ponds ; {S}b isotopes ; {S}b speciation ; {P}b isotopes ; {FRANCE}},
  booktitle = {},
  journal = {{C}hemosphere},
  volume = {313},
  numero = {},
  pages = {137368 [15 ]},
  ISSN = {0045-6535},
  year = {2023},
  DOI = {10.1016/j.chemosphere.2022.137368},
  URL = {https://www.documentation.ird.fr/hor/fdi:010086873},
}