@article{Song2026, 
author = {Jiajun Song and Shun Ding and Xiangding Wang and Xianyong Lan and Kewei Li and Chuanying Pan and Hongru Jiang and Wenkai Huang and Xiang Liu and Jiang Zhao},
title = {Upcycling Yak Dung into B, N-co-Doped Porous Biochar for 3-Aminophenol Removal and Real-World Sheep and Pig Manure Wastewater Treatment},
year = {2026},
journal = {Environmental Chemistry and Safety},
keywords = {Yak dung, advanced oxidation process, B, N co-doping, wastewater treatment, polymerization},
url = {https://www.sciopen.com/article/10.26599/ECS.2026.9600059},
doi = {10.26599/ECS.2026.9600059},
abstract = {Livestock waste is an ideal precursor for preparing carbon-based catalysts and its conversion into functional biochars for wastewater treatment may offer dual benefits for waste reutilization and environmental remediation. Herein, boron and nitrogen co-doped porous biochars (BNPBs) were successfully synthesized using a mixture of yak dung, boric acid, and urea via a one-step pyrolysis. The co-doping of B and N atoms into the biochars regulated their porosity, defect degree, and surface functional groups, and thereby facilitated the activation of peroxymonosulfate (PMS) for efficiently treating 3-aminophenol (3-AP). The catalyst BNPB-700 exhibited the optimal catalytic performance, and achieved 85.3% removal efficiency of 3-AP within 30 min. Mechanism analyses suggested that reactive oxygen species (ROS) including SO4•−, •OH, O2•−, and 1O2 together with direct electron transfer cooperatively contributed to the 3-AP removal through both mineralization and polymerization pathways. Application to the treatment of real sheep and pig manure wastewaters further confirmed the practical applicability of the BNPB-700/PMS system. By coupling the upcycling of yak dung into B, N co-doped biochars and the utilization for wastewater treatment, this work provides a promising strategy for achieving “waste to treat waste”.}
}