4 Discussion
The average of concentrations and mass loading of
heavy metal in water samples were generally high in
the inlet location of CW system, mainly for Al, Cu, Fe,
Mn, and Zn. These results may be explained by the use
of these metals in the fertilization of agriculture and
aquaculture systems. Moreover, the effluent with swine
wastes had a significantly high quantity of heavy metals
intentionally added in fodder to prevent diarrhea and to
enhance immune systems of swine (Hsu and Lo 2001).
4 DiscussionThe average of concentrations and mass loading ofheavy metal in water samples were generally high inthe inlet location of CW system, mainly for Al, Cu, Fe,Mn, and Zn. These results may be explained by the useof these metals in the fertilization of agriculture andaquaculture systems. Moreover, the effluent with swinewastes had a significantly high quantity of heavy metalsintentionally added in fodder to prevent diarrhea and toenhance immune systems of swine (Hsu and Lo 2001).
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