Detection and characterization of TiO$_2$ nanomaterials in sludge from wastewater treatment plants of Chihuahua State, Mexico

Reyes-Herrera, Juan (avtor), Acosta-Slane, Damaris (avtor), Castillo Michel, Hiram (avtor), Pradas del Real, Ana E. (avtor), Vogel-Mikuš, Katarina (avtor), Benetti, Federico (avtor), Roman, Marco (avtor), Villanova, Julie (avtor), Valles-Aragón, M. Cecilia (avtor)

TiO$_2$ nanoparticles (TiO$_2$-NPs) have a wide range of industrial applications (paintings, sunscreens, food and cosmetics) and is one of the most intensively used nanomaterials worldwide. Leaching from commercial products TiO$_2$-NPs are predicted to significantly accumulate in wastewater sludges, which are then often used as soil amendment. In this work, sludge samples from four wastewater treatment plants of the Chihuahua State in Mexico were obtained during spring and summer (2017). A comprehensive characterization study was performed by X-ray based (laboratory and synchrotron) techniques and electron microscopy. Ti was detected in all sludge samples (1810–2760 mg/kg) mainly as TiO$_2$ particles ranging from 40 nm up to hundreds of nm. MicroXANES data was analyzed by principal component analysis and linear combination fitting enabling the identification of three predominant Ti species: anatase, rutile and ilmenite. Micro-XANES from the smaller Ti particles was predominantly anatase (68% + 32% rutile), suggesting these TiO$_2$-NPs originate from paintings and cosmetics. TEM imaging confirmed the presence of nanoscale Ti with smooth surface morphologies resembling engineered TiO$_2$-NPs. The size and crystalline phase of TiO$_2$-NPs in the sludge from this region suggest increased reactivity and potential toxicity to agro-systems. Further studies should be dedicated to evaluating this.

• Jezik: Angleški jezik
• Ključne besede: nanoparticles, sewage sludge, X-ray microspectroscopy, synchrotron
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: BF - Biotehniška fakulteta
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2022
• Št. strani: 21 str.
• Številčenje: Vol. 12, iss. 5, art. 744
• PID: 20.500.12556/RUL-137272
• UDK: 549.514.6
• ISSN pri članku: 2079-4991
• DOI: 10.3390/nano12050744
• COBISS.SI-ID: 98738179
• Datum objave v RUL: 09.06.2022

Gradivo je del revije

• Naslov: Nanomaterials
• Skrajšan naslov: Nanomaterials
• Založnik: MDPI
• ISSN: 2079-4991
• COBISS.SI-ID: 523286297

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 01.03.2022

Projekti

• Financer: Drugi - Drug financer ali več financerjev
• Program financ.: Mexico, National Council for Science and Technology (CONACYT)

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P1-0212
• Naslov: Biologija rastlin