Institute of Eco-environmental Sciences, Liaoning Shihua University, Fushun 113001, China.
Institute of Eco-environmental Sciences, Liaoning Shihua University, Fushun 113001, China.
Bioresour Technol. 2017 Jun;233:159-165. doi: 10.1016/j.biortech.2017.02.103. Epub 2017 Feb 27.
Activated magnetic biochar (AMB) was prepared with corn stalks, reed stalks, and willow branches by simultaneous carbonization, magnetization, and activation, and used for norfloxacin removal in water. The exploration results showed that the zeta potential was positively charged at pH 2-10. These prepared activated magnetic biochars have a large specific surface area (>700m·g) and pore volume (>0.3cm·g). The quasi-second-order kinetic adsorption equation could better describe the adsorption of NOR on AMB. The Langmuir isotherm showed the better fitting results on AMB. The AMB showed the strong adsorption of NOR, and the saturated adsorption capacity of corn activated magnetic biochar was the highest, 7.6249mg·g. The adsorption of NOR on AMB was a spontaneous endothermic process. The effect of pH on the adsorption behaviors of NOR on AMB was not obvious, and AMB had a good adsorption effect on NOR in a wide pH range.
采用玉米秸秆、芦竹和柳树制备了同时碳化、磁化和活化的活性磁性生物炭（AMB），并将其用于水中诺氟沙星的去除。研究结果表明，在 pH 2-10 范围内，Zeta 电位带正电荷。这些制备的活性磁性生物炭具有较大的比表面积（>700m·g）和孔体积（>0.3cm·g）。准二级动力学吸附方程可以更好地描述 NOR 在 AMB 上的吸附。Langmuir 等温线在 AMB 上表现出更好的拟合结果。AMB 对 NOR 表现出较强的吸附作用，玉米活性磁性生物炭的饱和吸附容量最高，为 7.6249mg·g。NOR 在 AMB 上的吸附是一个自发的吸热过程。pH 值对 NOR 在 AMB 上吸附行为的影响不明显，AMB 在较宽的 pH 范围内对 NOR 具有良好的吸附效果。
