@article{fdi:010061947,
  title = {{G}eochemical behaviour of dissolved trace elements in a monsoon-dominated tropical river basin, {S}outhwestern {I}ndia},
  author = {{G}urumurthy, {G}. {P}. and {B}alakrishna, {K}. and {T}ripti, {M}. and {A}udry, {S}. and {R}iotte, {J}ean and {B}raun, {J}ean-{J}acques and {S}hankar, {H}. {N}. {U}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he study presents a 3-year time series data on dissolved trace elements and rare earth elements ({REE}s) in a monsoon-dominated river basin, the {N}ethravati {R}iver in tropical {S}outhwestern {I}ndia. {T}he river basin lies on the metamorphic transition boundary which separates the {P}eninsular {G}neiss and {S}outhern {G}ranulitic province belonging to {A}rchean and {T}ertiary-{Q}uaternary period ({W}estern {D}harwar {C}raton). {T}he basin lithology is mainly composed of granite gneiss, charnockite and metasediment. {T}his study highlights the importance of time series data for better estimation of metal fluxes and to understand the geochemical behaviour of metals in a river basin. {T}he dissolved trace elements show seasonality in the river water metal concentrations forming two distinct groups of metals. {F}irst group is composed of heavy metals and minor elements that show higher concentrations during dry season and lesser concentrations during the monsoon season. {S}econd group is composed of metals belonging to lanthanides and actinides with higher concentration in the monsoon and lower concentrations during the dry season. {A}lthough the metal concentration of both the groups appears to be controlled by the discharge, there are important biogeochemical processes affecting their concentration. {T}his includes redox reactions (for {F}e, {M}n, {A}s, {M}o, {B}a and {C}e) and p{H}-mediated adsorption/desorption reactions (for {N}i, {C}o, {C}r, {C}u and {REE}s). {T}he abundance of {F}e and {M}n oxyhydroxides as a result of redox processes could be driving the geochemical redistribution of metals in the river water. {T}here is a {C}e anomaly ({C}e/{C}e*) at different time periods, both negative and positive, in case of dissolved phase, whereas there is positive anomaly in the particulate and bed sediments. {T}he {C}e anomaly correlates with the variations in the dissolved oxygen indicating the redistribution of {C}e between particulate and dissolved phase under acidic to neutral p{H} and lower concentrations of dissolved organic carbon. {U}nlike other tropical and major world rivers, the effect of organic complexation on metal variability is negligible in the {N}ethravati {R}iver water.},
  keywords = {{N}ethravati-{G}urupur {R}ivers ; {D}issolved trace elements ; {REE}s ; {R}edox processes ; {S}orption reaction ; {T}ropical river ; {C}erium anomaly ; {INDE}},
  booktitle = {},
  journal = {{E}nvironmental {S}cience and {P}ollution {R}esearch},
  volume = {21},
  numero = {7},
  pages = {5098--5120},
  ISSN = {0944-1344},
  year = {2014},
  DOI = {10.1007/s11356-013-2462-7},
  URL = {https://www.documentation.ird.fr/hor/fdi:010061947},
}