18.97.9.173
18.97.9.173
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SCIE SCOPUS
토리아 및 몇몇 산화희토의 Zeta 전위와 현탁액의 안정성 ( 폐수함유 부유물질의 선택적 제거에 관한 응용연구 )
Zeta Potential and Stability of Suspensions for Thoria and Some Lanthanide Oxides ( An Application Study for Selective Separation of Suspensions Encountered in Wastewater )
김동수(Dong Su Kim), 김연식(Yeon Shik Kim)
UCI I410-ECN-0102-2008-580-001838381

In order to investigate colloidal behavior of the oxides and/or hydroxides of Ce, La, Nd, and Th, which encounter frequently in the processing of monazite, their zeta-potentials (ξ-potentials) were primarily determined by a zeta-meter as a function of pH. Also, critical ξ-potentials of those colloids were categorized through settling tests aided by light transmittant measurements. The zero point of charges (z.p.c,) for ThO₂, CeO₂, La(OH)₃, and Nd(OH)₃ lay respectively at pH 6.7, 2.1 & 11.5, 8.8, and 10.5. The critical ξ-potentials obtained were ±15mV(ThO₂), ±8mV(CeO₂), ±6mV(La(OH)₃), and ±10mV(Nd(OH)₃). From the acquired informations, an attempt to separate physically the mixture of oxides and/or hydroxides by selective flocculation was performed, which gave successful results.

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