Environmental Engineering Reference
In-Depth Information
Dissolved Organic Matter in Natural Waters
Khan M. G. Mostofa, Cong-qiang Liu, M. Abdul Mottaleb, Guojiang Wan,
Hiroshi Ogawa, Davide Vione, Takahito Yoshioka and Fengchang Wu
1 Introduction
Organic matter (OM) in water is composed of two major fractions: dissolved
and non-dissolved, defined on the basis of the isolation technique using filters
(0.1-0.7
μ
m). Dissolved organic matter (DOM) is the fraction of organic sub-
stances that passes the filter, while particulate organic matter (POM) remains on
the filter (Danielsson
1982
; Kennedy et al.
1974
; Liu et al.
2007
; Mostofa et al.
2009a
). DOM is generally originated from three major sources: (i) allochthonous
