KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
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Relationship Between Mass Transfer and Degradation of Sorbed Phenanthrene in Goethite Catalyzed Fenton-like Oxidation Using Non-ionic/anionic Surfactant

Phenanthrene 의 goethite 촉매에 의한 Fenton 산화에 있어서 음이온/비이온 계면활성제의 영향

  • Received : 2007.12.28
  • Accepted : 2008.12.26
  • Published : 2009.03.31
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Abstract

Surfactants were used as representative anionic and non ionic surfactants to investigate the effect of mass transfer on the mineral-catalyzed Fenton-like oxidation of sorbed phenanthrene. Mass transfer of phenanthrene on the oxide surface or interlayer between aqueous and solid phases was generated by surfactant addition. Apparent solubility of phenanthrene was increased as surfactant concentration increasesd. In tests using Tween 80, oxidation of phenanthrene decreased as apparent solubility increased. High apparent solubility was not responsible for oxidation of sorbed phenanthrene in the sand due to the surfactant acted as a scavenger of degradation. In tests with SDS, $H_{2}O_{2}$ decomposition rate in Fenton-like oxidation was decreased by complexation between goethite and SDS. However, in tests using 32 mM of SDS, efficiency of phenanthrene treatment increased compared to the test without SDS addition. Therefore, suitable amount of SDS addition could provide optimum condition for phenanthrene oxidation on the oxide surface or interlayer between aqueous and solid phase, and decrease $H_{2}O_{2}$ decomposition, and as a result, phenanthrene removal efficiency can be improved.

광물촉매에 의한 Fenton 산화에서 모래에 흡착된 phenanthrene을 대표적인 계면활성제인 SDS와 Tween 80을 사용하여 물질이동 영향을 조사하였다. 계면활성제 주입에 따라 액상과 고체상 사이 또는 산화물 표면으로 phenanthrene이 물질이동하였으며, 계면활성제 농도가 증가할수록 phenanthrene의 apparent solubility는 증가하는 경향을 나타내었다. Tween 80은 apparent solubility가 증가 하더라도, 계면활성제가 분해에 scavenger 작용을 하여 모래에 흡착된 phenanthrene 산화에는 영향을 주지 않았다. SDS를 주입하였을 때, Fenton-like 반응에서 SDS와 goethite가 착물을 형성하여 과산화수소 소모량을 지연시켰의며, 계면활성제를 주입 하지 않았을 때 보다 SDS 32 mM를 주입하였을 때 phenanthrene 처리효율이 증가하였다. 그러므로 최적농도의 SDS 주입은 액상과 고체상 사이 또는 산화물 표면에 phenanthrene 산화를 위한 적당한 조건을 제공 해주며, 과산화수소 소모량을 줄이고, phenanthrene 처리효율을 개선시킬 것이다.

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References

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