National Centre of Excellence in Analytical Cemistry, University of Sindh, Jamsoro, Sindh, Pakistan.
Dr.M.A.Kazi Institute of Chemistry, University of Sindh, Jamsoro, Pakistan.
Environ Sci Pollut Res Int. 2019 Apr;26(10):9796-9804. doi: 10.1007/s11356-019-04359-z. Epub 2019 Feb 7.
Pharmaceutically active compounds like diclofenac (DFS), ibuprofen (IBP), and other drugs that persist in the environment are listed as emerging contaminants. These escape from normal wastewater treatment plants and find their way to water streams; therefore, alternate treatment processes are needed. Herein, a sorbent material is reported that is prepared through hydrotermal carbonization from dried fruit powder of Zizipus mauritiana L. (HTC-ZM) and applied for simultaneous removal of DFS and IBP. Carbonized material (HTC-ZM) was found as agglomerates of approximately 1 μm particle size with surface area of 1160 m/g having oxygen functional groups (e.g., COO, O, C=O) on surface. Simultaneous removal of IBP and DFS onto HTC-ZM was studied using response surface methodology with a set of 18 experiments using factors such as pH, amount of sorbent, contact time, and sorbate concentration. Maximum removal efficiency was obtained 88% and 97% for DFS and for IBP, respectively, with adsorption capacity of 2.03 mmol g for DFS and 2.54 mmol g for IBP. Kinetics modeling and "mean free energy" values predicted that sorption is mainly governed by physical interactions followed by "pore filling" mechanism for uptake of DFS and IBP.
具有药理活性的化合物，如双氯芬酸（DFS）、布洛芬（IBP）和其他在环境中持续存在的药物，被列为新兴污染物。这些化合物从正常的废水处理厂逸出，并进入水流；因此，需要替代的处理工艺。在此，报告了一种通过干燥的毛叶枣（Zizipus mauritiana L.）果干粉水热碳化制备的吸附剂材料（HTC-ZM），用于同时去除 DFS 和 IBP。碳化材料（HTC-ZM）呈约 1μm 粒径的团聚体，比表面积为 1160m/g，表面存在含氧官能团（如 COO、O、C=O）。使用响应面法，通过一组 18 个实验，研究了 pH 值、吸附剂用量、接触时间和吸附质浓度等因素对 HTC-ZM 同时去除 IBP 和 DFS 的影响。最大去除效率分别为 DFS 的 88%和 IBP 的 97%，吸附容量分别为 2.03mmol/g 的 DFS 和 2.54mmol/g 的 IBP。动力学模型和“平均自由能”值预测，吸附主要受物理相互作用控制，随后是“孔填充”机制，用于 DFS 和 IBP 的吸收。
