Nano-pyrite as a Reductant to Remove Chromium in Groundwater
| Autor: | Suhaimi Abdul-Talib, Nurul Aqilah Abdul, Amnorzahira Amir |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
genetic structures Environmental remediation Inorganic chemistry technology industry and agriculture 0211 other engineering and technologies chemistry.chemical_element 02 engineering and technology engineering.material Redox Chromium Adsorption chemistry 021105 building & construction engineering Humic acid Pyrite Suspension (vehicle) Groundwater 021101 geological & geomatics engineering Civil and Structural Engineering |
| Zdroj: | KSCE Journal of Civil Engineering. 23:992-999 |
| ISSN: | 1976-3808 1226-7988 |
| DOI: | 10.1007/s12205-019-1034-x |
| Popis: | Removal of total chromium (CrT) by nano-pyrite (nano-FeS2) was investigated under different environmental conditions. Size of nano-FeS2 was in the range of 50−100 nm and it contained Fe and S. Removal kinetic rate constant of CrT was significantly dependent on the suspension pH and concentrations of CrT, nano-FeS2 and Humic Acid (HA). The removal kinetic rate constant of CrT by nano-FeS2 was decreased as the concentration of CrT was increased (0.43−0.29 min−1), while contradict kinetic result was observed as the concentration of nano-FeS2 was increased (1.11−2.78 min−1). The removal kinetic rate constant of CrT was significantly increased as the suspension pH increased (0.86−3.0 min−1). However, the removal kinetic rate constant of CrT was significant decreased in the present of HA (1.25−0.25 min−1). The removal kinetic rate constant of CrT by nano-FeS2 was strongly controlled by the reactive surface area of nano-FeS2. Identification of the formation of FeCr2O4 on the surface of nano-FeS2 reveals that adsorption, complexation and reduction reactions may occur during the removal reaction. This study provides fundamental knowledge on the fate of Cr under different groundwater conditions. Findings from this study can be used to enhance remediation technology of removal heavy metals from groundwater. |
| Databáze: | OpenAIRE |
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