@article{fdi:010070984,
  title = {{R}emobilization of polycyclic aromatic hydrocarbons and organic matter in seawater during sediment resuspension experiments from a polluted coastal environment : insights from {T}oulon {B}ay ({F}rance)},
  author = {{G}uigue, {C}. and {T}edetti, {M}arc and {D}ang, {D}. {H}. and {M}ullot, {J}. {U}. and {G}amier, {C}. and {G}outx, {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{P}olycyclic aromatic hydrocarbons ({PAH}s) and organic matter contents were measured in seawater during resuspension experiments using sediments collected from {T}oulon {B}ay ({N}orthwestern {M}editerranean {S}ea, {F}rance). {T}he studied sediments were very highly contaminated in {PAH}s, especially in 4-ring compounds emitted from combustion processes. {T}he sediments used for resuspension experiments were collected at 0-2 cm (diagenetically new organic matter, {OM}) and 30-32 cm depths (diagenetically transformed {OM}). {T}hey were both mostly composed of fine particles (<63 mu m), enriched in organic carbon (8.2 and 6.3%, respectively) and in {PAH}s (concentration of {S}igma 34 {PAH}s: 38.2 and 35.7 x 10(3) ng g(-1), respectively). {T}he resuspension of these sediments led to an increase in concentrations of dissolved 234 {PAH}s, dissolved organic carbon ({DOC}) and dissolved humic- and tryptophan-like fluorophores in seawater up to 10-, 1.3-, 4.4- and 5.7-fold, respectively. {T}he remobilization in seawater was higher for 4-6 ring {PAH}s, especially benzo(g,h,i)perylene, whose concentration exceeded the threshold values of the {E}uropean {W}ater {F}ramework {D}irective. {T}his noted the potential harmful effects of sediment resuspension on marine biota. {F}rom these sediment resuspension experiments, we determined {OC}-normalized partition coefficients of {PAH}s between sediment and water ({K}-oc) and found that during such events, the transfer of {PAH}s from sediment particles to seawater was lower than that predicted from octanol-water partition coefficients ({K}-ow) (i.e., measured {K}-oc > {K}-oc predicted from {K}-ow). {T}he results confirmed the sequestration role of sedimentary {OC} quality and grain size on {PAH}s; the {OM} diagenetic state seemed to impact the partition process but in a relatively minor way. {F}urthermore, differences were observed between 2-4 ring and 5-6 ring {PAH}s, with the latter displaying a relatively higher mobility towards seawater. {T}hese differences may be explained by the distribution of these two {PAH} pools within different {OM} moieties, such as humic substances and black carbon.},
  keywords = {{S}ediment resuspension ; {R}emobilization ; {P}olycyclic aromatic hydrocarbons ; {F}luorescent dissolved organic matter ; {S}ediment-water partition ; {FRANCE} ; {MEDITERRANEE} ; {TOULON} {BAIE}},
  booktitle = {},
  journal = {{E}nvironmental {P}ollution},
  volume = {229},
  numero = {},
  pages = {627--638},
  ISSN = {0269-7491},
  year = {2017},
  DOI = {10.1016/j.envpol.2017.06.090},
  URL = {https://www.documentation.ird.fr/hor/fdi:010070984},
}