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Title of Journal: Environ Geochem Health

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Abbravation: Environmental Geochemistry and Health

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Springer Netherlands

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DOI

10.1002/abc.21166

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1573-2983

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Environmental risk induced by TiOSubscript2/Sub

Authors: Antonio Lettino Claudia Belviso Francesco Cavalcante Saverio Fiore
Publish Date: 2015/02/15
Volume: 38, Issue: 1, Pages: 73-84
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Abstract

A southern Italian area that is characterized by large outcrops of rocks that are rich in titanium oxide TiO2 phases were investigated to determine the mineralogical risk induced by the natural dispersion of TiO2 minerals Rock sediment and surface water samples were collected to determine the physicochemical and mineralogical factors ie size distribution morphology and alteration indicative of potential TiO2 toxicity Xray diffraction data suggested that titanium oxides were present as rutile and anatase Scanning electron microscopy images showed elongated TiO2 morphologies fibres were found as either isolated or embedded/enclosed in flakelike phyllosilicates The concentration of fibres in stream water ranged from 17 to 46 million fibres per litre The highest fibre amounts in the sediments were in the 8µm fraction while single fibres were primarily concentrated in the 2µm fraction The results indicate that titanium oxide minerals represent a natural source of environmental risk and that the geomineralogical characterization of rich TiO2 areas is indispensable for understanding their geoavailability dispersion and distribution

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