Synthesis of magnetic Mn/Fe oxides derived from drinking water sludges from a one-pot solvothermal process for the degradation of tetracycline and mixed dyes: synergistic effect and mechanism study

Adsorptive removal of aflatoxin B1 from water and edible oil by dopamine-grafted biomass chitosan–iron–cobalt spinel oxide nanocomposite: mechanism, kinetics, equilibrium, thermodynamics, and oil quality

“…The acceptable adjusted- R 2 (0.8624), R 2 (0.9133), and C.V. (13.65%) for AFB 1 removal imply the high degree of precision and reliability for the model analysis. 29 Besides, the curved nature of the 3D response surface and 2D contour plots prove the mutual interactions between the independent variables with p -value < 0.05. 29,36 According to the results, the pH parameter was identified as a non-influential parameter due to its low F -value (0.07), followed by temperature (0.14), time (23.12), [AFB 1 ] 0 (27.43), and [DC/CFOS] 0 (57.19).…”

“…29 Besides, the curved nature of the 3D response surface and 2D contour plots prove the mutual interactions between the independent variables with p -value < 0.05. 29,36 According to the results, the pH parameter was identified as a non-influential parameter due to its low F -value (0.07), followed by temperature (0.14), time (23.12), [AFB 1 ] 0 (27.43), and [DC/CFOS] 0 (57.19). The RSM measured the removal efficiency of AFB 1 under the predicted optimum conditions ([DC/CFOS] = 3.092 mg L −1 , [AFB 1 ] = 51.89 μg mL −1 , [temperature] = 26.37 °C, [time] = 108.94 min, and [pH] = 6.97), which was 90.561%, with the desirability of 0.957, as demonstrated by the following experimental results (90.25%, 91.03%, 89.80% and 90.10%) under the predicted optimum conditions.…”

“…29 Besides, the curved nature of the 3D response surface and 2D contour plots prove the mutual interactions between the independent variables with p-value < 0.05. 29,36 According to the results, the pH parameter was iden-tied as a non-inuential parameter due to its low F-value (0.07), followed by temperature (0.…”

“…The initial pH solution signicantly changes the surface characteristics of substances (e.g., surface charge, acidity and basicity, and chemical/physical interactions). 29 Briey, 0.06 mg of DC/ CFOS NC was weighed and mixed with the 10.0 mL AFB 1 stock solution (100 mg mL −1 ) and DW (20.0 mL) to achieve an AFB 1 dosage of 50.0 mg mL −1 , the pH value was adjusted to 3.0, 5.0, 7.0 or 9.0, and subsequently the UV absorption of the untreated and treated solutions was recorded using a UV-visible spectrophotometer at l max = 364 nm. At pH < pH pzc , the surface of the adsorbent will be positively charged, which makes it easy to adsorb materials with a negative charge and vice versa.…”

Degradation of 2, 4‐dichlorophenol by peroxymonosulfate catalyzed by ZnO/ZnMn2O4

“…Chloride anions are present in the system because of the dichlorination process of 2, 4‐DCP. Their presence may cause the reactions between Cl − and radicals to generate species (Equations –) of HOCl • , Cl 2 •− , and Cl • radicals, as well as HOCl as an oxidizing agent, to alter the final removal efficiency of 2, 4‐DCP (Faraji et al, 2023). Therefore, the added extra amount of Cl − may not be high enough to scavenge OH • and SO 4 •− radicals compared with their existing amounts to affect the final removal efficiency.…”