Environmental Engineering Reference
In-Depth Information
Complexation of Dissolved Organic Matter
with Trace Metal Ions in Natural Waters
Khan M. G. Mostofa, Cong-qiang Liu, Xinbin Feng, Takahito Yoshioka,
Davide Vione, Xiangliang Pan and Fengchang Wu
1 Introduction
Complexation of the metal ions (M) with dissolved organic matter (DOM), i.e.
M-DOM formation is of fundamental importance in metal ion chemistry and can
control the occurrence of free toxic metals, the transport or migration of metals,
acid-base balance and solubility in water, occurrence of the photo-Fenton reaction
in surface water, biological effects, the bioavailability and toxicity to organisms in
water, sediment and soil environments. DOM in natural waters can either enhance
or decrease metal transport and affect the bioavailability of metals depending on its
composition. DOM is a complex mixture of organic compounds of allochthonous
