@article{fdi:010090563,
  title = {{A}ntimony isotope fractionation during {S}b({V}) and {S}b({III}) adsorption on secondary {F}e-minerals (schwertmannite, ferrihydrite) typical of mine waters},
  author = {{F}errari, {C}. and {R}esongles, {E}l{\'e}onore and {F}reydier, {R}. and {C}asiot, {C}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he application of antimony ({S}b) isotopes as tracers for {S}b environmental cycling is currently limited. {I}ndeed, there is a lack of knowledge of isotope fractionation factors associated with key (bio-) geochemical processes controlling its behaviour in surface environments. {T}his study investigated the equilibrium isotope fractionation generated by {S}b({V}) and {S}b({III}) sorption on two iron minerals typical of acid mine drainage ({AMD}) impacted streams, ferrihydrite and schwertmannite, under controlled conditions of p{H} and solid to liquid ratio. {S}orption behaviour and {S}b isotope fractionation were similar for the different mineral phases and {S}b oxidation degrees, with fractionation factors {D}elta 123{S}bsolid-solution of -0.25 +/- 0.08 %o for {S}b({III}) and -0.34 +/- 0.08 %o for {S}b({V}) adsorbed on ferrihydrite and -0.36 +/- 0.06 %o for {S}b({III}) and -0.27 +/- 0.03 %o for {S}b({V}) adsorbed on schwertmannite. {T}he p{H} and initial {F}e:{S}b ratio did not significantly affect the {D}elta 123{S}bsolid-solution value under the experimental conditions. {T}he light 121{S}b isotope was preferentially adsorbed on the mineral phases, following an equilibrium closed system between dissolved and adsorbed {S}b species. {T}his fractionation may be related to the apparition of iron as the second closest neighbour which distorts the {S}b({OH})3 or {S}b({OH})6- atomic polyhedron. {T}his study confirms that {S}b equilibrium isotope fractionation occurs during sorption of {S}b({III}) and {S}b({V}) onto secondary iron minerals and suggests that the p{H} and redox of {S}b do not exert significant effect. p{H} and redox conditions are important parameters which control {S}b mobility in {AMD} streams, therefore, the study provides data for interpreting {S}b isotope signatures in mine waters.},
  keywords = {{A}ntimony isotopes ; {E}quilibrium isotope fractionation ; {I}ron oxyhydroxides ; {A}dsorption ; {M}ining environments},
  booktitle = {},
  journal = {{A}pplied {G}eochemistry},
  volume = {163},
  numero = {},
  pages = {105935 [11 ]},
  ISSN = {0883-2927},
  year = {2024},
  DOI = {10.1016/j.apgeochem.2024.105935},
  URL = {https://www.documentation.ird.fr/hor/fdi:010090563},
}