School of Materials Science and Engineering, Beijing Key Laboratory of Environmental Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China.
Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL, 32611, USA.
Environ Sci Pollut Res Int. 2018 Sep;25(26):25659-25667. doi: 10.1007/s11356-017-8849-0. Epub 2017 Mar 28.
This study explored the sorption of sulfamethoxazole (SMX) and sulfapyridine (SPY) onto biochars produced from raw and anaerobically digested bagasse. Initial evaluation of six bagasse biochars showed that digested bagasse biochar prepared at 600 °C (DBG600) was the best adsorbent to remove SMX and SPY. Further laboratory batch sorption experiments showed that DBG600 adsorbed SMX and SPY from aqueous solution with maximum adsorption capacity of 54.38 and 8.60 mg g, respectively. Solution pH showed strong effect on the sorption ability of DBG600 to the two antibiotics, and the sorption decreased with increasing of solution pH. Experimental and model results suggested that adsorption of SMX and SPY onto DBG600 might be controlled by the π-π interaction.
本研究探讨了从原蔗渣和厌氧消化蔗渣制备的生物炭对磺胺甲恶唑（SMX）和磺胺吡啶（SPY）的吸附作用。对 6 种蔗渣生物炭的初步评价表明，在 600°C 下制备的厌氧消化蔗渣生物炭（DBG600）是去除 SMX 和 SPY 的最佳吸附剂。进一步的实验室批量吸附实验表明，DBG600 从水溶液中吸附 SMX 和 SPY 的最大吸附容量分别为 54.38 和 8.60mg/g。溶液 pH 值对 DBG600 对两种抗生素的吸附能力有很强的影响，随着溶液 pH 值的增加，吸附能力下降。实验和模型结果表明，SMX 和 SPY 吸附到 DBG600 上可能受 π-π 相互作用控制。
