期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 290, 期 -, 页码 43-50出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2015.02.046
关键词
Activated carbon; Black carbon; Charcoal; Emerging contaminants; Slow pyrolysis; Veterinary antibiotics
资金
- Basic Science Research Program, through National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology [2012R1A1B3001409]
- Korea Ministry of Environment, Geo-Advanced Innovative Action Project [G112-00056-0004-0]
- Korea Basic Science Institute
- Environmental Research Institute
- Central Laboratory of Kangwon National University, Korea
- National Research Foundation of Korea [2012R1A1B3001409] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Recent investigations have shown frequent detection of pharmaceuticals in soils and waters posing potential risks to human and ecological health. Here, we report the enhanced removal of sulfamethazine (SMT) from water by physically activated biochar. Specifically, we investigated the effects of steam-activated biochars synthesized from an invasive plant (Sicyos angulatus L) on the sorption of SMT in water. The properties and sorption capacities of steam-activated biochars were compared with those of conventional non-activated slow pyrolyzed biochars. Sorption exhibited pronounced pH dependence, which was consistent with SMT speciation and biochar charge properties. A linear relationship was observed between sorption parameters and biochar properties such as molar elemental ratios, surface area, and pore volumes. The isotherms data were well described by the Freundlich and Temkin models suggesting favorable chemisorption processes and electrostatic interactions between SMT and biochar. The steam-activated biochar produced at 700 degrees C showed the highest sorption capacity (37.7 mg g(-1)) at pH 3, with a 55% increase in sorption capacity compared to that of non-activated biochar produced at the same temperature. Therefore, steam activation could potentially enhance the sorption capacities of biochars compared to conventional pyrolysis. (C) 2015 Elsevier B.V. All rights reserved.
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