@article{fdi:010031308,
  title = {{T}he {A}mazon {R}iver : behaviour of metals ({F}e, {A}l, {M}n) and dissolved organic matter in the initial mixing at the {R}io {N}egro/{S}olimoes confluence},
  author = {{A}ucour, {A}.{M}. and {T}ao, {F}.{X}. and {M}oreira {T}urcq, {P}atricia and {S}eyler, {P}atrick and {S}heppard, {S}. and {B}enedetti, {M}.{F}.},
  editor = {},
  language = {{ENG}},
  abstract = {{W}e studied the changes in major elements and organic carbon concentrations during the initial stage of the mixing of the black ({R}io {N}egro) and the {W}hite ({R}io {S}olimoes) waters in the {A}mazon {R}iver basin to understand the geochemical processes that could control the redistribution between particulate and dissolved fractions. {W}ater samples were collected at six stations including the {R}io {N}egro and the {R}io {S}olimoes and four stations downstream from the confluence. {T}he relative contributions of the two tributaries were determined using a triple tracer approach (delta(18){O}, delta{D}, {C}l-). {P}articulate (>0.2 mum) and dissolved ( <0.2 mum) concentrations of major elements ({C}a, {M}g, {F}e, {A}l, {S}i) and organic carbon ({POC} and {DOC}) were measured. {M}ajor elements in the particulate fraction were found to have a nonconservative behaviour in the initial stage of the mixing due to mineral removal. {I}n the dissolved fraction, only the {DOC}, {F}e, and {M}n behaved nonconservatively. {T}he {F}e losses could be due to preferential removal of {F}e bound to {N}-rich organic matter ({OM}) and/or to preferential removal of {F}e oxyhydroxides. {T}he increasing dissolved manganese content in the dissolved phase is explained by a reductive dissolution of manganese oxides due to massive inputs of phenolic-rich {OM} from the {R}io {N}egro. {T}he amount of {DOC} removed from the water column in the initial stage of the mixing would represent 4% of the total annual {DOC} flux of the {A}mazon {R}iver at the reference gauging station of {O}bidos.},
  keywords = {{COURS} {D}'{EAU} ; {TRANSPORT} {SOLIDE} ; {ELEMENT} {CHIMIQUE} {MAJEUR} ; {ELEMENT} {EN} {TRACE} ; {METAL} ; {ION} ; {FER} ; {ALUMINIUM} ; {MANGANESE} ; {MATIERE} {ORGANIQUE} {DISSOUTE} ; {MATIERE} {ORGANIQUE} {PARTICULEE} ; {MATIERE} {EN} {SUSPENSION} ; {SEDIMENT} ; {CARBONE} {ORGANIQUE} ; {ANALYSE} {CHIMIQUE} ; {ANALYSE} {ISOTOPIQUE} ; {GEOCHIMIE} ; {CHIMIE} {DE} {L}'{EAU} ; {AMAZONIE} ; {AMAZONE} {COURS} {D}'{EAU} ; {NEGRO} {COURS} {D}'{EAU} ; {SOLIMOES} {COURS} {D}'{EAU}},
  booktitle = {},
  journal = {{C}hemical {G}eology},
  volume = {197},
  numero = {1-4},
  pages = {271--285},
  ISSN = {0009-2541},
  year = {2003},
  DOI = {10.1016/{S}0009-2541(02)00398-4},
  URL = {https://www.documentation.ird.fr/hor/fdi:010031308},
}