Activity of zero-valent sulfur in sulfidic natural waters.

ABSTRACT:

Background

Ionic and molecular carriers of dissolved (filter-passing) zero-valent sulfur (S⁰) in anaerobic natural waters include polysulfides, S_n^2-, molecular S₈(aq), organic macromolecules and certain higher valent thioanions. Because S⁰ is rapidly transferred among these various carriers, its biogeochemical roles in such processes as dehalogenation of organic compounds, chelation of trace metals, and anaerobic microbial metabolism are not determined solely by one ionic or molecular species. Here, S⁰ is treated collectively as a virtual thermodynamic component, and computational as well as graphical methods for quantifying its activity (a_S0) in natural waters are presented. From a_S0, concentra

SUBMITTER: Helz GR 

PROVIDER: S-EPMC4631721 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature