Evidence for iron, copper and zinc complexation as multinuclear sulphide clusters in oxic rivers

Details Evidence for iron, copper and zinc complexation as multinuclear sulphide clusters in oxic rivers Evidence for iron, copper and zinc complexation as multinuclear sulphide clusters in oxic rivers

Aug 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000natur.406..879r&link_type=abstract

Nature, Volume 406, Issue 6798, pp. 879-882 (2000).

Other

1

Scientific paper

The availability and toxicity of trace metals in fresh water are known to be regulated by the complexation of free metal ions with dissolved organic matter. The potential role of inorganic sulphides in binding trace metals has been largely ignored because of the reduced persistence of sulphides in these oxic waters. However, nanomolar concentrations of copper and zinc sulphides have been observed in four rivers in Connecticut and Maryland. Here we report dissolved (< 0.2µm particle diameter) sulphide concentrations ranging up to 600nM, with more than 90% being complexed by copper, iron and zinc. These complexes account for up to 20% of the total dissolved Fe and Zn and 45% of the total dissolved Cu. Fourier transform mass spectrometry reveals that these complexes are not simple M(HS)+ protonated species but are higher-order unprotonated clusters (M3S3, M4S 6, M2S4), similar to those found in laboratory solutions and bio-inorganic molecules. These extended structures have high stability constants and are resistant to oxidation and dissociation, which may help control the toxicity of these and other less abundant, but more toxic, trace metals, such as silver, cadmium and mercury.

Affiliated with

Also associated with

No associations

Rating

Evidence for iron, copper and zinc complexation as multinuclear sulphide clusters in oxic rivers does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Evidence for iron, copper and zinc complexation as multinuclear sulphide clusters in oxic rivers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evidence for iron, copper and zinc complexation as multinuclear sulphide clusters in oxic rivers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-891437