title: Nano-mineralogy of suspended sediment during the beginning of coal rejects spill.
abstract: Ultrafine and nanometric sediment inputs into river systems can be a major source of nutrients and hazardous elements and have a strong impact on water quality and ecosystem functions of rivers and lakes regions. However, little is known to date about the spatial distribution of sediment sources in most large scale river basins in South America. The objective of this work was to study the coal cleaning rejects (CCRs) spill that occurred from a CCRs impoundment pond into the Tubarão River, South Brazil, provided a unique occasion to study the importance and role of incidental nanoparticles associated with pollutant dispersal from a large-scale, acute aquatic pollution event. Multifaceted geochemical research by X-ray diffraction (XRD), High Resolution-Transmission Electron microscopy (HR-TEM)/(Energy Dispersive Spectroscopy) EDS/(selected-area diffraction pattern) SAED, Field Emission-Scanning Electron Microscopy (FE-SEM)/EDS, and Raman spectroscopy, provided an in-depth understanding of importance of a nano-mineralogy approach of Aqueous Pollution Scenarios. The electron beam studies showed the presence of a number of potentially hazardous elements (PHEs) in nanoparticles (amorphous and minerals). Some of the neoformed ultrafine/nanoparticles found in the contaminated sediments are the same as those commonly associated with oxidation/transformation of oxides, silicates, sulfides, and sulfates. These data of the secondary ultra/nanoparticles, puts in evidence their ability to control the mobility of PHEs, suggesting possible presentations in environmental technology, including recuperation of sensitive coal mine. The developed methodology facilitated the sediment transport of the catchment providing consistent results and suggesting its usefulness as a tool for temporary rivers management.
authors.affiliation: Laboratory of Environmental Researches and Nanotechnology Development, Centro Universitário La Salle, Mestrado em Avaliação de Impactos Ambientais em Mineração, Victor Barreto, 2288 Centro 92010-000 Canoas, RS, Brazil.
authors.forename: Matheus S
authors.initials: MS
authors.lastname: Civeira
authors.affiliation: Laboratory of Environmental Researches and Nanotechnology Development, Centro Universitário La Salle, Mestrado em Avaliação de Impactos Ambientais em Mineração, Victor Barreto, 2288 Centro 92010-000 Canoas, RS, Brazil.
authors.forename: Claudete G
authors.initials: CG
authors.lastname: Ramos
authors.affiliation: Laboratory of Environmental Researches and Nanotechnology Development, Centro Universitário La Salle, Mestrado em Avaliação de Impactos Ambientais em Mineração, Victor Barreto, 2288 Centro 92010-000 Canoas, RS, Brazil.
authors.forename: Marcos L S
authors.initials: ML
authors.lastname: Oliveira
authors.affiliation: Laboratory of Environmental Researches and Nanotechnology Development, Centro Universitário La Salle, Mestrado em Avaliação de Impactos Ambientais em Mineração, Victor Barreto, 2288 Centro 92010-000 Canoas, RS, Brazil.
authors.forename: Rubens M
authors.initials: RM
authors.lastname: Kautzmann
authors.affiliation: Laboratory of Environmental Researches and Nanotechnology Development, Centro Universitário La Salle, Mestrado em Avaliação de Impactos Ambientais em Mineração, Victor Barreto, 2288 Centro 92010-000 Canoas, RS, Brazil.
authors.forename: Silvio R
authors.initials: SR
authors.lastname: Taffarel
authors.affiliation: Fundação Estadual de Proteção Ambiental Henrique Luis Roessler, Porto Alegre, RS, Brazil.
authors.forename: Elba C
authors.initials: EC
authors.lastname: Teixeira
authors.affiliation: Laboratory of Environmental Researches and Nanotechnology Development, Centro Universitário La Salle, Mestrado em Avaliação de Impactos Ambientais em Mineração, Victor Barreto, 2288 Centro 92010-000 Canoas, RS, Brazil. Electronic address: felipeqma@hotmail.com.
authors.forename: Luis F O
authors.initials: LF
authors.lastname: Silva
mesh_terms: D001938:Brazil; D003031:Coal / Q000032:analysis*; D060729:Coal Ash / Q000032:analysis; D004784:Environmental Monitoring / Q000379:methods*; D019015:Geologic Sediments / Q000737:chemistry*; D015386:Hazardous Substances / Q000032:analysis; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D008903:Minerals / Q000032:analysis; D053758:Nanoparticles / Q000032:analysis*; D045483:Rivers / Q000737:chemistry*; D017640:Silicates / Q000032:analysis; D013052:Spectrometry, X-Ray Emission; D013440:Sulfides / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000032:analysis*; D060753:Water Quality; D014961:X-Ray Diffraction
chemical_list: D003031:Coal; D060729:Coal Ash; D015386:Hazardous Substances; D008903:Minerals; D017640:Silicates; D013440:Sulfides; D014874:Water Pollutants, Chemical
keywords: Coal cleaning rejects; Hazardous elements; Nanoparticle morphology; Sediments