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Nanoparticles and interfaces with toxic elements in fluvial suspended sediment.

Luis F O Silva¹, Guilherme L Dotto², Diana Pinto¹

¹Department of Civil and Environmental, Universidad de la Costa, Calle 58 #55-66, 080002 Barranquilla, Atlántico, Colombia.

Marine Pollution Bulletin

|May 3, 2021

Summary

Titanium nanoparticles (Ti-NPs) and hazardous elements in river sediments pose ecological risks. This study analyzed Ti-NPs in Colombia

Keywords:

Nanomineral–water interface Particle mode of occurrence Rutile and Anatase nano-minerals Size-dependent properties Surface particle geochemistry Titanium-nanoparticles

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In Situ Detection and Single Cell Quantification of Metal Oxide Nanoparticles Using Nuclear Microprobe Analysis

In Situ Detection and Single Cell Quantification of Metal Oxide Nanoparticles Using Nuclear Microprobe Analysis

Published on: February 3, 2018

Area of Science:

Environmental Science
Nanotechnology
Geochemistry

Background:

Suspended sediments (SSs) can contain nanoparticles (NPs) and hazardous elements (HEs), impacting watershed health.
Assessing the ecological and human health risks of these contaminants requires robust analytical methods.
Titanium nanoparticles (Ti-NPs) are increasingly recognized environmental contaminants.

Purpose of the Study:

To investigate the occurrence, mode of occurrence, and geochemical properties of Ti-NPs in the Magdalena River's SSs.
To evaluate the potential ecological risks associated with Ti-NPs and HEs in riverine systems.
To advocate for standardized methods for NP contamination assessment and international guidelines.

Main Methods:

Utilized nanogeochemistry, field emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HR-TEM), energy-dispersive X-ray microanalysis (EDS), X-ray diffraction (XRD), and inductively coupled plasma-mass spectrometry (ICP-MS).
Analyzed the mode of occurrence of Ti-NPs and quantified total Ti and other elements in SS samples.
Assessed geochemical properties and potential ecological dangers of identified Ti-NPs.

Main Results:

Confirmed the presence of significant quantities of Ti-NPs in the Magdalena River's SSs.
Revealed diverse geochemical properties of the Ti-NPs, indicating varied origins and behaviors.
Identified potential ecological risks associated with Ti-NP and HE contamination in the river system.

Conclusions:

The study highlights the widespread presence and potential ecological threat of Ti-NPs in riverine environments.
Emphasizes the need for developing Ti-NP contamination indices and international guidelines for SS contamination.
Contributes to understanding the complex dynamics of HEs and Ti-NPs in SSs globally.