Selective Removal of Toxic Heavy Metals in Fe-Coagulants

철염 응집제 중 유독성 중금속의 선택적 제거

  • 박상원 (계명대학교 환경과학대학)
  • Published : 1999.06.01


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 ${FeS}_{(s)}$. 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 ${FeS}_{(s)}$ is similar to that of ${PbS}_{(s)}$. Solubility characteristics of ${FeS}_{(s)}$ 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 ${FeS}_{(s)}$. From the above experiments, therefore, We could know that the products of reaction between heavy metal ions and $FeS_{(S)}$ are mental sulfide such as $PbS_{(S)}$, $CuS_{(S)}$ and $ZnS_{(S)}$.


  1. Geochim. Cosmochim. Acta v.49 the distribution of divalent trace elements between sulfides oxides, silicates and hydrothermal solutions Sverjensky, D.A.
  2. J. Colloid Interface Science v.128 The adsorption characteristics of some heavy metal ions on the hydrous CdS surface Park, S.W.;C.P. Huang
  3. Control and treatment technology for the metal finishing industry sulfide precipitation EPA
  4. J. Chem. v.30 adsorption of calcium at the zinc sulfide-water interface Moigmard, M.S.;R.O. James;T.W. Healy
  5. Aquatic Chemistry Stumm;J.J. Morgan
  6. AICHE Symp. Ser. v.71 Adsorption of Zinc(II) at the Cinnabar (HgS)/H₂O Interface James, R.O.;G.A. Parks
  7. Geochim. Cosmochim. Acta v.43 Heavy metal adsorption by sulphide solutions Jean, G.E.;G.M. Bancroft
  8. J. Colloid Interface Science v.117 The surface acidity of hydrous CdS Park S.W.;C.P. Huang
  9. Water Research v.23 Chemical substitution reaction at the hydrous CdS surface Park, S.W.;C.P. Huang
  10. Process chemistry for water and wastewater treatment Benefield, D.L.;J.F. Judkins;B.L. Weand