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The following results were obtained in the reductive degradation of hexachloroethane (HCA), and surface characteristics by using iron sulfide ($FeS,\;FeS_{2}$ ) mediators. HCA was degraded to pentachloroethane (PCA), tetrachloroethylene(PCE), trichloroethylene(TCE) and cis-l,2-dichloroethylene (cis-1,2-DCE) by complicated pathways such as hydrogenolysis, dehaloelimination and dehydrohalogenation. FeS had more rapid degradation rates of organic solvent than $FeS_{2}$ . In liquidsolid reaction, the reaction rates of organic solvents were investigated to explain surface characteristics of FeS and $FeS_{2}$ .. To determine surface characteristics of FeS and $FeS_{2}$ , the specific surface area and surface potential of each mineral was determined and the hydrophilic site ($N_{s}$ ) was calculated. The specific surface area ($107.0470m^{2}/g\;and\;92.6374m^{2}/g$ ) and the $pH_{ZPC}$ of minerals ($FeS\;PH_{ZPC}=7.42,\;FeS_{2},\;PH_{ZPC}=7.80$ ) were measured. The results showed that the Ns of FeS and $FeS_{2}$ were $0.053\;site/mm^{2}\;and\;0.205\;site/mm^{2}$ , respectively. $FeS_{2}$ had more hydrophilic surface than FeS. In other words, FeS have more hydrophobic surface site than $FeS_{2}$ .
본 논문에서는 황화철($FeS,\;FeS_{2}$ ) 유기 용매의 환원적 분해 반응과의 표면특성의 관계에 대해서 다음과 같은 결과를 얻었다. hexachloroethane(HCA)은 수소첨가반응, 탈염소제거반응과 탈수소탈염소화반응으로 pentachloroethane(PCA), tetrachloroethylene(PCE), trichloroethylene(TCE)와 cis-1,2-dichloroethylene(cis-1,2-DCE)로 분해되었다. FeS와 $FeS_{2}$ 를 반응 매개물로 HCA에 대한 반응에서 FeS는 $FeS_{2}$ 보다 분해반응 속도가 빠르게 나타났다. FeS와 $FeS_{2}$ 의 표면 특성 연구에서 각 광물질에 대한 친수성 표면 자리(Ns)를 정량적으로 계산하기 위해서 비표면적 값($107.0470m^{2}/g$ 와 $92.6374m^{2}/g$ )과 표면 전위를 측정에 측정된 $PH_{ZPC}(FeS,\;PH_{ZPC}=7.42,\;FeS_{2},\;PH_{ZPC}=7.80)$ 값을 이용해서 계산한 결과 FeS와 $FeS_{2}$ 의 $N_{s}$ 값은 각각 $0.053\;site/nm^{2},\;0.205\;site/nm^{2}$ 으로 나타났다. 그리고 0.2 g/L Fe광물질에 대한 실질적인 친수성 표면 농도는 각각 $3.303{\times}10^{-6}\;mol/L$ 와 $1.102{\times}10^{-5}\;mol/L$ 나타났다. $FeS_{2}$ 는 FeS에 비해 훨씬 친수성 표면임을 실험 결과 확인하였다. FeS와 $FeS_{2}$ 의 두 광물질 중에서 유기 용매의 환원 반응 속도는 FeS가 훨씬 빠르게 나타났다.
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- Publisher :The Korean Society of Soil and Groundwater Environment
- Publisher(Ko) :한국지하수토양환경학회
- Journal Title :Journal of Soil and Groundwater Environment
- Journal Title(Ko) :지하수토양환경
- Volume : 11
- No :5
- Pages :35 ~ 42
Journal of Soil and Groundwater Environment
