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KMID : 1024519990080030393
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Journal of the Environmental Sciences
1999 Volume.8 No. 3 p.393 ~ p.397
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Selective Removal of Toxic Heavy Metals in Fe-Coagulants
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Park Sang-Won
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Abstract
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Among various reactions which metal sulfides can undergo in the reducing environment, the lattice exchange reaction was examined in a attempt to selectively remove heavy metal ions contained in the Fe-Coagulants acid solution. We have examined Zeta potential along with pHs to investigate surface characteristics of . As a result of this experiment, zero point charge(ZPC) of FeS is pH 7 and zeta potential which resulted from solid solution reaction between Pb(II) and is similar to that of . Solubility characteristics of is appeared to that dissolved Fe(II) concentration increased in less than pH 4, and also increased with increasing heavy metal concentration. Various heavy metal ions(Pb(II), Cu(II), Zn(II)) contained in Fe-coagulants acid solution were removed selectively more than ninety-five percent in the rang of pH 2.5~10 by . From the above experiments, therefore, We could know that the products of reaction between heavy metal ions and are mental sulfide such as , and .
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KEYWORD
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Solid solution theory, Lattice exchange reaction, Metal sulfide
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