Quantification of potassium permanganate consumption and PCE oxidation in subsurface materials.

摘要: Abstract A series of laboratory scale batch slurry experiments were conducted in order to establish a data set for oxidant demand by sandy and clayey subsurface materials as well identify the reaction kinetic rates permanganate (MnO4−) consumption PCE oxidation function MnO4− concentration. The carried out with 31 sediments from 12 Danish sites. results show that sediment, termed natural (NOD), is primary regards quantification consumption. Dissolved concentrations up 100 mg/l investigated not significant factor total Consumption increases an increasing initial sediment type also important NOD (generally) higher than given For different types typical values are 0.5–2 g MnO4−/kg dry weight (dw) glacial meltwater sand, 1–8 g dw till 5–20 g till. long term can be described single rate constant, reduction comprised several reactions individual rates. During hours reaction, first kinetics applied, where short constants 0.05–0.5 h− 1 0.5–4.5 h− 1, respectively. does act instantaneous sink MnO4−. reactive species result parallel reactions, during which between contaminant takes place. Hence, application low cause partly PCE, need met fully before oxidised.