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Assessing the impacts of sewage sludge amendment containing nano-TiO2 on tomato plants: A life cycle study

Bakshi, Mansi and Liné, Clarisse and Bedolla, Diana E. and Stein, Ricardo José and Kaegi, Ralf and Sarret, Géraldine and Pradas del Real, Ana E. and Castillo-Michel, Hiram and Abhilash, P.C. and Larue, Camille Assessing the impacts of sewage sludge amendment containing nano-TiO2 on tomato plants: A life cycle study. (2019) Journal of Hazardous Materials, 369. 191-198. ISSN 0304-3894

(Document in English)

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Official URL: https://doi.org/10.1016/j.jhazmat.2019.02.036


Increasing evidence indicates the presence of engineered nanoparticles (ENPs) in sewage sludge derived from wastewater treatment. Land application of sewage sludge is, therefore, considered as an important pathway for ENP transfer to the environment. The aim of this work was to understand the effects of sewage sludge containing nano-TiO2 on plants (tomato) when used as an amendment in agricultural soil. We assessed developmental parameters for the entire plant life cycle along with metabolic and bio-macromolecule changes and titanium accumulation in plants. The results suggest that the sewage sludge amendment containing nano-TiO2 increased plant growth (142% leaf biomass, 102% fruit yield), without causing changes in biochemical responses, except for a 43% decrease in leaf tannin concentration. Changes in elemental concentrations (mainly Fe, B, P, Na, and Mn) of plant stem, leaves and, to a lesser extent fruits were observed. Fourier-transformed infrared analysis showed maximum changes in plant leaves (decrease in tannins and lignins and increase in carbohydrates) but no change in fruits. No significant Ti enrichment was detected in tomato fruits. In conclusion, we evidenced no acute toxicity to plants and no major implication for food safety after one plant life cycle exposure.

Item Type:Article
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Banaras Hindu University - BHU (INDIA)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > European Synchrotron Radiation Facility - ESRF (FRANCE)
Other partners > Elettra-Sincrotrone Trieste (ITALY)
Other partners > Instituto Leonardo Murialdo - ILEM (BRAZIL)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
French research institutions > Institut de Recherche pour le Développement - IRD (FRANCE)
Other partners > Université Grenoble Alpes - UGA (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Swiss Federal Institute of Aquatic Science and Technology - EAWAG (SWITZERLAND)
Other partners > Université de Savoie Mont Blanc - USMB (FRANCE)
Laboratory name:
Deposited On:30 Mar 2021 12:55

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