Cobalt-loaded cherry core biochar composite as an effective heterogeneous persulfate catalyst for bisphenol A degradation

Abstract

Co/C composites were prepared with a one-step pyrolysis method for the activation of persulfate to degrade organic pollutants.

Co-catalysis of trace dissolved Fe(iii) with biochar in hydrogen peroxide activation for enhanced oxidation of pollutants

“…21 The low efficiency of H 2 O 2 activation by biochar leads to unsatisfactory performance on pollutant removal and excess H 2 O 2 consumption. So, biochar was more oen applied as a carrier of catalysts, [22][23][24][25] or aer special modications [26][27][28] for use in advanced oxidation processes (AOPs).…”

Chalcopyrite as an oxidants activator for organic pollutant remediation: A review of mechanisms, parameters, and future perspectives

“…Moreover, the efficiency of pollutant removal may decline after reaching the optimum catalyst dosage, as a result of delayed mass transfer and restricted access to active sites at high catalyst dosage. This can occur due to the formation of diffusion boundary layers, inactive catalyst surfaces, and limited diffusion resulting from the aggregation of catalyst particles, which ultimately leads to reduced catalytic activity and efficiency [ [95] , [96] , [97] ].…”

Ultra-small Co3O4 particles embedded into N-doped carbon derived from ZIF-9 via half-pyrolysis for activating peroxymonosulfate to degrade sulfamethoxazole

“…4–7 Among them, sulfate radicals generated with activating peroxymonosulfate (PMS) technology have a higher oxidation potential (2.6–3.1 V), wider pH application range (2–9), and longer half-life (30–40 μs) than the hydroxyl radical in the Fenton reaction. 8–10…”

“…[4][5][6][7] Among them, sulfate radicals generated with activating peroxymonosulfate (PMS) technology have a higher oxidation potential (2.6-3.1 V), wider pH application range (2)(3)(4)(5)(6)(7)(8)(9), and longer half-life (30-40 ms) than the hydroxyl radical in the Fenton reaction. [8][9][10] Up to now, many metals such as Co, Fe, Cu, and Mn have been reported to rapidly activate PMS to generate abundant free radicals, among which cobalt ions have been regarded as the most effective. [11][12][13] Although the homogeneous catalyst is more efficient, it is difficult to recover and has the possibility of secondary pollution aer the activation process.…”