Byambaa Battuya 김은주 Seid Mingizem, Gashaw 안병민 조진수 아웅샤인 린 Song, Kyung Guen 2024-01-12T02:33:23Z 2024-01-12T02:33:23Z 2023-02-02 2023-01 1385-8947 https://pubs.kist.re.kr/handle/201004/75852 Nitrogen-doped biochar (HTNBC) was prepared from sewage sludge via hydrothermal route-enabled carbon-ization, and the optimized HTNBC was found to efficiently activate peroxymonosulfate (PMS) by aiming the less consumption of the chemicals. The optimal HTNBC degraded a 0.1 mM aqueous solution of bisphenol A (BPA) within 10 min at a rate of 0.62 min-1, exhibiting a significantly superior catalytic activity compared to that of pristine sludge biochar. The HTNBC/PMS system effectively oxidized various organic pollutants, including BPA, sulfamethoxazole, 4-chlorophenol, carbamazepine, and nitrobenzene with a low consumption of PMS (1.0 mM) and a low catalyst loading (0.2 g/L). The active sites for PMS activation were identified as graphitic-N, pyridinic-N, and carbonyl groups, besides structural defects and a high specific surface area were also important. The primary oxidation mechanism was anticipated to involve non-radical pathways followed by radical-induced oxidation, in which the surface-bound reactions dominate. The HTNBC/PMS system acts over a wide pH range and exhibits a high resistance to the inorganic anions of natural water. Our results indicate that nitrogen doping via a hydrothermal route allows the fabrication of biochar with a greater abundance of oxygen functional groups, and the specific nitrogen species present within the carbon matrix are also of importance in the development of advanced carbon catalysts. English Elsevier BV Synthesis of N-doped sludge biochar using the hydrothermal route-enabled carbonization method for the efficient degradation of organic pollutants by peroxymonosulfate activation Article 10.1016/j.cej.2022.141037 1 Chemical Engineering Journal, v.456 Chemical Engineering Journal 456 N scie scopus 000909789100001 Engineering, Environmental Engineering, Chemical Engineering CARBON NANOTUBES BISPHENOL-A PEROXYDISULFATE ACTIVATION GRAPHENE OXIDE PERSULFATE PYROLYSIS CATALYSTS UREA PMS Sludge biochar HydrothermalN-doping Carbonyl group PMS activation Bisphenol A