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ABSTRACT Due to heavy economic activities in
Taiwan, many illegal discharges of industrial wastes caused the
contamination of agricultural land.Thus,development of an
economic, efficient, and effective technology to remedy the
contaminated soil is very important. Many evidence indicated
that Soluble Microbial Products (SMP) were released during
microbial activities.The concentration and characteristics of
the SMP are functions of the microbial species, growth
environment, rate of substrate utilization,temperature,pH and
Oxidation/Reduction Pontential, etc. A research was
conducted using the uncontaminated soil from Taoyuan County to
simulate the soil contaminated with Cadmium. The soil was used
in a column study to determine the complexation characteristics
of the SMP and its effect on Cadmium mobilization in soil under
aerobic and anaerobic conditions. The results show that
changes of SMP concentration are close related to the
concentration of Cadmium in the reactor effluents. In soil
column test, 26.8% of the Cadmium was released from aerobic
column,while 15.3% of the Cadmium was released from anaerobic
column. Column which microbial activity was inhibited and
leached with acetic acid and inorganic nutrients had 22.8% of
Cadmium desorbed from the soil. Column leached with only
inorganic nutrients had 1.3% of the Cadminm released from the
soil.Key words: Soluble Microbial Products(SMP), complexation
soil leaching, Cadmium
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