@article{fdi:010087749,
  title = {{W}ildfires on {C}r-rich {F}erralsols can cause freshwater {C}r({VI}) pollution : a pilot study in {N}ew {C}aledonia},
  author = {{J}uillot, {F}arid and {M}eyer, {M}. and {Q}uiniou, {T}. and {D}avid, {M}. and {J}ourand, {P}hilippe and {D}ucousso, {M}. and {F}ritsch, {E}mmanuel and {T}hery, {G}.},
  editor = {},
  language = {{ENG}},
  abstract = {{I}n the context of global warming, environmental forcing of wildfires on continental ecosystems is on a growing trend. {A}mong other environmental impacts, wildfires can enhance trace metals concentration in freshwater systems. {I}n this regard, chromium is of particular environmental and health concern because the temperatureinduced oxidation of the less mobile and toxic {C}r({III}) form to the most mobile and toxic {C}r({VI}) one might represent a risk of freshwater pollution. {T}he aim of the present study was to make a first assessment of this risk in {N}ew {C}aledonia by quantifying the influence of soil heating on {C}r({VI}) mobility in {C}r-rich {F}erralsols that cover about 1/3 of this {F}rench overseas territory. {T}he results obtained indicated an enhanced {C}r({VI}) mobility upon soil heating from 200 degrees {C}, with a marked turnaround from 400 degrees {C}. {B}ased on these results, a solid/solution mass balance approach allowed to confirm the risk of freshwater {C}r({VI}) pollution as a function of suspended particulate matter ({SPM}) concentration issued from burned {C}r-rich {F}erralsols. {I}n addition, the results obtained revealed an apparent control of the {F}e-oxides/silicates ratio on {C}r({VI}) mobility upon soil heating. {S}ince this ratio decreases from the top to the bottom of ultramafic catchments, this latter result suggests that the risk of freshwater {C}r({VI}) pollution could depend on the actual location of the wildfires at the top or slope/base of these catchments. {S}ince freshwaters represent the major water resource for the inhabitants of {N}ew {C}aledonia, these results point to the need for a larger evaluation of the risk of wildfires-induced freshwater {C}r({VI}) pollution at other catchments composed of {C}r-bearing soils like {C}ambisols and {V}ertisols. {A}t the larger scale, they also point to the need to foster studies aimed at better evaluating the risk of wildfires-induced freshwater {C}r({VI}) pollution at {C}r-bearing pedological settings worldwide.},
  keywords = {{W}ildfire ; {F}erralsols ; {C}hromium ; {F}reshwater ; {SPM} ; {P}ollution ; {NOUVELLE} {CALEDONIE}},
  booktitle = {},
  journal = {{A}pplied {G}eochemistry},
  volume = {148},
  numero = {},
  pages = {105513 [10 ]},
  ISSN = {0883-2927},
  year = {2023},
  DOI = {10.1016/j.apgeochem.2022.105513},
  URL = {https://www.documentation.ird.fr/hor/fdi:010087749},
}