Chalcopyrite-activated sodium percarbonate oxidation for sludge dewaterability enhancement: Synergetic roles of •OH and 1O2

Synthesis of a Co/Ni-MOF-74@PDI Z-scheme photocatalyst as a highly efficient photo-assisted Fenton-like catalyst for the removal of chlortetracycline hydrochloride

“…Finally, ˙OH, ˙O 2 , 1 O 2 and h + degraded and mineralized CTC. 48,50,65–69 Co/Ni-MOF-74@PDI + hv → h + + e − H 2 O 2 + e − (Co/Ni-MOF-74) → ˙OH + OH − H 2 O 2 + h + (PDI) → ˙O 2 + 2H + Co 2+ /Ni 2+ + H 2 O 2 → Co 3+ /Ni 3+ + OH − + ˙OHCo 3+ /Ni 3+ + H 2 O 2 → Co 2+ /Ni 2+ + ˙OOH + H + ˙OOH + ˙OH → H 2 O 2 + 1 O 2 ˙OH (˙O 2 , 1 O 2 and h + ) + CTC → degradation products…”

Enhanced Recovery of Alginate-like Extracellular Polymers (ALE) from Waste-Activated Sludge Using Sodium Percarbonate: Performance and Characteristics

“…SPC can be decomposed into hydrogen peroxide and sodium carbonate in aqueous media without any by-product formation. It has recently been used as a conditioner to enhance sludge dewaterability [17][18][19], anaerobic fermentation [20][21][22], or anaerobic digestion performance [23,24]. Many prior efforts were made to active SPC via homogeneous or heterogeneous catalysis, including ferrous iron [17,25], zero-valent iron [26], iron-containing minerals [19], sludge-derived biochar [18], ultrasound [20,23], and ultraviolet [27].…”

“…It has recently been used as a conditioner to enhance sludge dewaterability [17][18][19], anaerobic fermentation [20][21][22], or anaerobic digestion performance [23,24]. Many prior efforts were made to active SPC via homogeneous or heterogeneous catalysis, including ferrous iron [17,25], zero-valent iron [26], iron-containing minerals [19], sludge-derived biochar [18], ultrasound [20,23], and ultraviolet [27]. The above comprehensive studies showed that SPC-based pretreatments accelerated sludge solubilization through disintegrating the extracellular polymeric substances and the cell walls of the sludge.…”