期刊
WATER RESEARCH
卷 95, 期 -, 页码 103-112出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2016.03.014
关键词
Sorption; Carbonaceous nanocomposites; Sulfamethazine; Aqueous solution; Aging
资金
- National Natural Science Foundation of China [51521006, 51378190, 51278176, 51408206, 51579098]
- Program for New Century Excellent Talents in University [NCET-13-0186]
- Scientific Research Fund of Hunan Provincial Education Department [521293050]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT-13R17]
- Fundamental Research Funds for the Central Universities
- Hunan Provincial Innovation Foundation for Postgraduate [CX2015B091]
- International S&T Cooperation Program of China [2015DFG92750]
This paper investigated the key factors and mechanisms of sulfamethazine (SMT) sorption on a novel carbonaceous nanocomposite, and the effects of harsh aging on SMT sorption in the presence and absence of soil and before as well as after aging. The carbonaceous nanocomposites were synthesized by dip-coating straw biomass in carboxyl functionalized multi-walled carbon nanotubes solution and then pyrolyzed at 300 degrees C and 600 degrees C in the absence of air. The sorption performance of high temperature carbonaceous nanocomposite on SMT was excellent, as measured sorption distribution coefficient in the order of 10(3)-10(5.5) L kg(-1). Carbonaceous nanocomposites were aged either alone or mixed with soil via exposure to nutrients and soil extract (biological aging) or 80 degrees C for 100 d (chemical aging). No obvious effects of harsh aging on SMT sorption were observed in the presence of soil and/or biological and chemical aging. The primary mechanisms for SMT sorption included partition caused by Van der Waals forces and adsorption caused by hydrogen bonding and pi-pi electron-donor-acceptor interaction. Comprehensively considering the cost, renewability, and the application to real water samples, the carbonaceous nanocomposites have potential in removal of SMT and possibly other persistent organic pollutants from wastewater. (C) 2016 Elsevier Ltd. All rights reserved.
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