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Scientific article
English

Size fractionation of trace metal species in freshwaters: implications for understanding their behaviour and fate

Publication date2002
Abstract

Data on both the colloid size distributionpresent in freshwaters and the extent to whichtrace metal ions associate with the differentsize fractions within the so-called ‘dissolved' phasein these systems are examined. Several keyfeatures are identified: (i) division of totalmetal into ‘particulate' and ‘dissolved' fractions via a single ca. 450 nm filtrationprocedure provides no useful information, (ii)within the ‘dissolved' fraction, a continuum ofparticle sizes exists in the colloidal sizerange in freshwaters, (iii) for the tracemetals Cu, Cd, Zn, Cr, Co, and Ni, the greatestproportion of dissolved trace metals are in the ‘low molecular mass' fraction, together withthe largest proportion of DOC, (iv) in allrivers, and in lakes with a low DOC content,the predominant determiner of the sizedistribution of trace metals is the lowermolecular size, more strongly complexing,pedogenic organic matter fraction.

Citation (ISO format)
TOWN, Raewyn May, FILELLA, Montserrat. Size fractionation of trace metal species in freshwaters: implications for understanding their behaviour and fate. In: Reviews in Environmental Science and Bio/Technology, 2002, vol. 1, p. 277–297.
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Article (Published version)
accessLevelRestricted
Identifiers
  • PID : unige:101224
ISSN of the journal1569-1705
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