Green synthesis of natural limonite-modified biochar catalyst for peroxymonosulfate activation in efficient degradation carbamazepine in water

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 115522 - 115522

Published: Jan. 1, 2025

Language: Английский

Effect of persulfate dosage on organic degradation using N‐doped biochar: Reaction pathway and environmental implications

Water Environment Research, Journal Year: 2025, Volume and Issue: 97(3)

Published: March 1, 2025

Persulfate-based advanced oxidation processes (PS-AOPs) catalyzed by carbon-based catalysts are promising for removing organic pollutants via radical/non-radical pathways. However, the activation efficiency of peroxymonosulfate (PMS) or peroxydisulfate (PDS) usage and reaction mechanism remain insufficiently understood. In this study, effects PMS/PDS dosage on degradation bisphenol A (BPA, 10 mg/L) were evaluated using N-doped biochar (N-BC, 0.2 g/L) assisted PS-AOPs. The pathways comprehensively investigated through a combination characterization techniques molecular simulations. With low PS dosages (0.05 0.1 mM), rate constants ( kobs$$ {k}_{obs} $$ ) higher in N-BC/PDS (0.04 0.07 min-1) compared to N-BC/PMS (0.02 0.04 min-1), likely due PDS utilization, which enhanced contribution non-radical pathway. Interestingly, with (0.5 1.5 values 0.16 min-1 0.18 N-BC/PMS, respectively, significantly exceeding those determined (0.11 0.11 min-1). This result stemmed from greater adsorption capacity N-BC PMS PDS, leading increased formation 1O2. both dosage. results highlighted that BPA improved increase dosage; meanwhile, was insensitive optimal found be mM PDS. study offered valuable insights optimizing PS-AOPs environmental remediation, helping guide selection appropriate oxidants maximizing pollutant removal. PRACTITIONER POINTS: Effect revealed. Contribution dominated pathway as increased. utilization resulted at adsorbed more than an high

Language: Английский

Biochar-based catalytic upgrading of plastic waste into liquid fuels towards sustainability

Communications Earth & Environment, Journal Year: 2025, Volume and Issue: 6(1)

Published: April 29, 2025

Language: Английский