Department of Civil & Environmental Engineering, The Faculty of Engineering, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand.
Department of Civil & Environmental Engineering, The Faculty of Engineering, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand.
J Hazard Mater. 2021 Sep 5;417:126010. doi: 10.1016/j.jhazmat.2021.126010. Epub 2021 May 11.
Magnetic tyre char (MTC), activated tyre char (ATC) and commercial activated carbon (CAC) were used as packing materials in lab-scale column study for the adsorption of three pharmaceuticals: propranolol (PRO), ciprofloxacin (CIP) and clomipramine (CLO), from aqueous solution. The obtained breakthrough curves (BTCs) suggest that, lower flow rate, greater bed height, higher pH and nano particle size led to increased adsorption of PRO. The lowest adsorption capacity was observed for CIP either from single or ternary solution while it was significantly higher for CLO. Surface area of ATC increased nearly twelve-fold (38.17 to 453.81 m/g), after thermal and chemical activation and adsorption capacity was comparable to commercial activated carbon. The suitability of Hydrus-1D model incorporating chemical non-equilibrium process to simulate the pharmaceutical transport and fit experimental BTCs was demonstrated (97.29 <R <99.22) in comparison to other common models (Adams-Bohart, Thomas and Yoon-Nelson). The modelling suggests the existence of non-equilibrium conditions and rate-limited sorption sites and the effect of dispersion and mass transfer mechanisms in the solute transport under dynamic conditions. The cost analysis showed that unit cost for treatment of wastewater using fixed-bed columns of tyre char was calculated to be 1.57 US$/m which can be deemed as commercially feasible.
磁性轮胎炭（MTC）、活化轮胎炭（ATC）和商业活性炭（CAC）被用作实验室规模柱试验中的填充材料，用于从水溶液中吸附三种药物：普萘洛尔（PRO）、环丙沙星（CIP）和氯米帕明（CLO）。得到的穿透曲线（BTC）表明，较低的流速、较大的床层高度、较高的 pH 值和纳米颗粒尺寸导致 PRO 的吸附增加。在单一组分或三元溶液中，CIP 的吸附容量最低，而 CLO 的吸附容量则显著增加。经过热化学活化后，ATC 的比表面积增加了近十二倍（38.17 至 453.81 m/g），吸附容量可与商业活性炭相媲美。结果表明，与其他常见模型（Adams-Bohart、Thomas 和 Yoon-Nelson）相比，采用包含化学非平衡过程的 Hydrus-1D 模型模拟药物传输并拟合实验 BTC 的适用性更好（97.29<R<99.22）。该模型表明，在动态条件下，溶质传输中存在非平衡条件和速率限制的吸附点位，以及弥散和传质机制的影响。成本分析表明，使用轮胎炭固定床柱处理废水的单位成本计算为 1.57 美元/立方米，可视为商业可行。
