Compared to conventional extraction (CE-NF, 6.69 mg GAE/g), the phenol amounts of HPE-BLF and HPE-LRF were significantly increased to more than 8 mg GAE/g, while the lowest flavonoid contents were observed for HPE-BLF (0.44 mg RE/mL) and HPE-LRF (0.45 mg RE/mL) (p < 0.05).
As a result, the model expressed the reaction characteristics well with respect to the temporal changes of phenol conversion, amount of AC catalyst, and oxygen concentration in the effluent.
Whether the pollutant model is RhB or phenol, the amount of Fe2O3 in the products has obvious influence on photocatalytic activity of Fe2O3/BiVO4.
Total phenol and flavonoid amounts of the extracts were determined spectrophotometrically.
As stated by our results, the most abundant total phenol and flavonoid amounts were determined in the EtOH extract of ZN and the EtOH extract of the wild sample of RC.
Clearly, the plentiful phenolic contents in two Zostera species screened herein prospectively seem to contribute to their antioxidant capacity, which is in accordance with their total phenol and flavonoid amounts determined in our current study.
Sulphide is also photooxidized maximally, at low phenol concentrations, the amount of sulphide oxidized being greater than in the absence of or in high concentrations of phenol.
The optimum condition was predicted to be 4.03 g/L, 77.8 min, 0.5 mL H2O2 and 100 ppm (phenol) of catalyst amount, reaction time, H2O2 volume and phenol concentration, respectively.
By catalytic upgrading, the amount of phenol and monomeric phenols was increased (Figure 4a), while the amount of heavy phenols was decreased (Figure 4b). Figure 4 Effect of catalysts on the phenolic products (a) the light phenol (b) the heavy phenol.
The presence of phenolics is clearly evident, as is the higher amount of phenol observed in A. pseudopratensis.
