@article{fdi:010075107,
  title = {{Q}uantifying the impacts of artisanal gold mining on a tropical river system using mercury isotopes},
  author = {{G}oix, {S}. and {M}aurice, {L}aurence and {L}affont, {L}. and {R}inaldo, {R}. and {L}agane, {C}hristelle and {C}hmeleff, {J}. and {M}enges, {J}. and {H}eimburger, {L}. {E}. and {M}aury-{B}rachet, {R}. and {S}onke, {J}. {E}.},
  editor = {},
  language = {{ENG}},
  abstract = {{I}n some locations, artisanal and small-scale gold-mining ({ASGM}) represents a significant source of anthropogenic {H}g to freshwater environments. {T}he {H}g released from {ASGM} can contaminate aquatic fauna and pose health risks to downstream populations. {T}otal {H}g ({TH}g) concentrations, speciation, and isotopic compositions were analyzed in water, suspended particulate matter, soil, and bottom sediment samples from pristine areas and in places of active and legacy gold mining along the {O}yapock {R}iver ({F}rench {G}uiana) and its tributaries. {M}ass-independent fractionation ({MIF}) of even {H}g isotopes in top soils ({D}elta {H}g-200 = -0.06 +/- 0.02 parts per thousand, n = 10) implied the uptake of gaseous {H}g(0) by plants, rather than wet deposition, as the primary {H}g source. {O}dd isotope {MIF} was lower in deep soils ({D}elta {H}g-199 = -0.75 +/- 0.03 parts per thousand, n = 7) than in top soils ({D}elta {H}g-199 = -0.55 +/- 0.15 parts per thousand, n = 3). {T}his variation could be attributed to differences between the isotopic signatures of modern and pre-industrial atmospheric {H}g. {C}ombining a {H}g-isotope binary mixing model with a multiple linear regression based on physicochemical parameters measured in the sediment samples, we determined that active mined creek sediments are contaminated by {ASGM} activities, with up to 78% of {TH}g being anthropogenic. {O}f this anthropogenic {H}g, more than half (66-74%) originates from liquid {H}g(0) that is released during {ASGM}. {T}he remaining anthropogenic {H}g comes from the {ASGM}-driven erosion of {H}g-rich soils into the river. {T}he isotope signatures of anthropogenic {H}g in bottom sediments were no longer traceable in formerly mined rivers and creeks.},
  keywords = {{M}ercury stable isotopes ; {M}ercury speciation ; {A}rtisanal and small-scale ; gold mining ({ASGM}) ; {F}rench {G}uiana ; {GUYANE} {FRANCAISE}},
  booktitle = {},
  journal = {{C}hemosphere},
  volume = {219},
  numero = {},
  pages = {684--694},
  ISSN = {0045-6535},
  year = {2019},
  DOI = {10.1016/j.chemosphere.2018.12.036},
  URL = {https://www.documentation.ird.fr/hor/fdi:010075107},
}