Center for Water Resources Cycle Research, Korea Institute of Science and Technology, 5 Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, South Korea.
Center for Water Resources Cycle Research, Korea Institute of Science and Technology, 5 Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, South Korea; Division of Energy and Environmental Engineering, KIST School, Korea University of Science and Technology, 5 Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, South Korea.
Bioresour Technol. 2017 Nov;244(Pt 1):23-32. doi: 10.1016/j.biortech.2017.07.133. Epub 2017 Jul 25.
Batch and continuous fixed-bed column studies were investigated using electrochemically modified biochar calcium-alginate beads (EMB-CABs) as an adsorbent for the removal of phosphate from aqueous solutions. Batch experiments revealed that the phosphate adsorption behavior of EMB-CABs and its structural characteristics were highly dependent on pH condition. Also, kinetics and equilibrium isotherms studies demonstrated that the experimental data correlated well with the pseudo-second-order and Sips isotherm models, respectively. The effects of different operating parameters such as bed height, initial phosphate concentration, and flow rate were investigated in a continuous fixed-bed column, and the experimental data were fitted to three different breakthrough models, the Adams-Bohart, Thomas, and Yoon-Nelson models. The results suggested that the Yoon-Nelson model showed better agreement with the breakthrough curves than other models. Lastly, the design parameters for a large-scale column were calculated via the scale-up approach using the breakthrough parameters obtained from lab-scale column tests.
采用电化学改性生物炭-海藻酸钠珠（EMB-CAB）作为吸附剂，通过批处理和连续固定床柱研究了从水溶液中去除磷酸盐的方法。批处理实验表明，EMB-CAB 的磷酸盐吸附行为及其结构特征高度依赖于 pH 值条件。此外，动力学和平衡等温线研究表明，实验数据分别与准二级和 Sips 等温线模型很好地相关。在连续固定床柱中研究了不同操作参数（如床层高度、初始磷酸盐浓度和流速）的影响，并将实验数据拟合到三个不同的穿透模型（Adams-Bohart、Thomas 和 Yoon-Nelson 模型）中。结果表明，Yoon-Nelson 模型与穿透曲线的吻合度优于其他模型。最后，通过使用从小规模柱试验获得的穿透参数，通过放大方法计算了大型柱的设计参数。
