@article{fdi:010092588,
  title = {{P}hysicochemical properties and bioreactivity of {S}ub-10 {M}u m geogenic particles : comparison of volcanic ash and desert dust},
  author = {{T}omasek, {I}. and {E}ychenne, {J}. and {D}amby, {D}. {E}. and {H}ornby, {A}. {J}. and {R}omanias, {M}. {N}. and {M}oune, {S}. and {U}zu, {G}a{\¨e}lle and {S}chiavi, {F}ederica and {D}ole, {M}. and {G}ard{\`e}s, {E}. and {L}aumonier, {M}. and {G}orce, {C}. and {M}inet-{Q}uinard, {R}. and {D}urif, {J}. and {B}elville, {C}. and {T}raor{\'e}, {O}. and {B}lanchon, {L}. and {S}apin, {V}.},
  editor = {},
  language = {{ENG}},
  abstract = {{E}xposure to ambient particulate matter ({PM}) with an aerodynamic diameter of <10 mu m ({PM}10) is a well-established health hazard. {T}here is increasing evidence that geogenic ({E}arth-derived) particles can induce adverse biological effects upon inhalation, though there is high variability in particle bioreactivity that is associated with particle source and physicochemical properties. {I}n this study, we investigated physicochemical properties and biological reactivity of volcanic ash from the {A}pril 2021 eruption of {L}a {S}oufri & egrave;re volcano, {S}t. {V}incent, and two desert dust samples: a standardized test dust from {A}rizona and an aeolian {G}obi {D}esert dust sampled in {C}hina. {W}e determined particle size, morphology, mineralogy, surface texture and chemistry in sub-10 mu m material to investigate associations between particle physicochemical properties and observed bioreactivity. {W}e assessed cellular responses (cytotoxic and pro-inflammatory effects) to acute particle exposures (24 hr) in monocultures at the air-liquid interface using two types of cells of the human airways: {BEAS}-2{B} bronchial epithelial cells and {A}549 alveolar type {II} epithelial cells. {I}n acellular assays, we also assessed particle oxidative potential and the presence of microorganisms. {T}he results showed that volcanic ash and desert dust exhibit intrinsically different particle morphology, surface textures and chemistry, and variable mineralogical content. {W}e found that {G}obi {D}esert dust is more bioreactive than freshly erupted volcanic ash and {A}rizona test dust, which is possibly linked to the presence of microorganisms (bacteria) and/or nanoscale elongated silicate minerals (potentially clay such as illite or vermiculite) on particle surfaces.},
  keywords = {desert dust ; volcanic ash ; particulate matter ; respiratory hazard ; physicochemical properties ; bioreactivity ; {ETATS} {UNIS} ; {CHINE} ; {ARIZONA} ; {GRENADINES} ; {GOBI} {DESERT} ; {SOUFRIERE} {SAINT} {VINCENT} {VOLCAN}},
  booktitle = {},
  journal = {{G}eohealth},
  volume = {9},
  numero = {1},
  pages = {e2024{GH}001171 [28 ]},
  ISSN = {2471-1403},
  year = {2025},
  DOI = {10.1029/2024gh001171},
  URL = {https://www.documentation.ird.fr/hor/fdi:010092588},
}