Akademik Veri Yönetim Sistemi
JOURNAL OF CONTAMINANT HYDROLOGY, cilt.276, 2026 (SCI-Expanded, Scopus)
Remediating chlorinated solvent plumes such as trichloroethene (TCE) and tetrachloroethene (PCE) in groundwater remains a major challenge. In this study, a novel slow-release permanganate gel (SRP-G) technique offers promise for controlled, sustained permanganate (MnO4-) release to oxidize these contaminants in situ. Batch experiments assessed the gelling behavior and TCE degradation potential of two SRP- G amendments (NaMnO4 and KMnO4), while column tests examined MnO4- release under varying flow rates in saturated porous media. Batch results showed an initial lag in gelation followed by rapid viscosity increases. Higher SRP-G amendment concentrations produced greater MnO4- release and enhanced TCE degradation, reducing TCE concentrations from similar to 50-60 mg/L to 30-35 mg/L within 60 min. Column experiments revealed that under 3.4 mL/min and 6.9 mL/min flow conditions, respectively, the KMnO4 SRP-G amendment yielded a longer MnO4- release duration at a lower SRP-G concentration compared to the NaMnO4 SRP-G amendment, indicating that the KMnO4 SRP-G amendment is more suitable for long-term remediation. Modeling using the fractional advection-dispersion equation successfully captured MnO4- release profiles, illustrating multi-rate mass transfer processes (associated with the slow-release effect of permanganate (oxidant)) and supporting the potential of SRP-G as an effective long-term remediation strategy for chlorinated solvent plumes.