Advanced Materials Research Chair, Chemistry Department, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia.
Advanced Materials Research Chair, Chemistry Department, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia.
Int J Biol Macromol. 2020 Sep 15;159:870-876. doi: 10.1016/j.ijbiomac.2020.05.154. Epub 2020 May 21.
Iron composite nanoparticles were prepared (90% yield) using macromolecule chitosan and characterized by spectroscopic techniques (FT-IR, XRD, SEM, TEM & EDX). These were utilized to remove diclofenac sodium in water. The adjusted parameters were 400 μg/ L, 50.0 min., 5.0, 2.0 g/ L and 25.0 °C as concentration, contact time, pH, adsorbent amount and temperature for the elimination of diclofenac sodium in water with maximum 85% elimination. The sorption was spontaneous with exothermic. Data followed Langmuir, Temkin and Dubinin-Radushkevich models. Thermodynamic parameter ΔG° values were -12.19, -13.74 and -15.67 kJ/mol at 20, 25 and 30 °C temperatures. The values of ΔH° and ΔS° were 8.58 and 20.84 kJ/mol. Pseudo-first-order and liquid film diffusion mechanisms were proposed for the adsorption. This adsorption method is fast, effective eco-friendly and low-cost as it may be used in natural circumstances of water resources. The sorption method may be applied for the elimination of diclofenac sodium in any water body at a huge and financial scale.
采用大分子壳聚糖制备了铁复合纳米粒子（产率 90%），并通过光谱技术（FT-IR、XRD、SEM、TEM 和 EDX）进行了表征。这些纳米粒子被用于去除水中的双氯芬酸钠。调整的参数为 400μg/L、50.0min、5.0、2.0g/L 和 25.0°C，分别为浓度、接触时间、pH 值、吸附剂用量和温度，以实现水中双氯芬酸钠的最大 85%去除率。吸附是自发的，放热的。数据遵循朗缪尔、坦金和杜宾-拉什科夫斯基模型。在 20、25 和 30°C 温度下，热力学参数 ΔG°值分别为-12.19、-13.74 和-15.67kJ/mol。ΔH°和ΔS°的值分别为 8.58 和 20.84kJ/mol。提出了吸附的拟一级和液膜扩散机制。这种吸附方法快速、有效、环保且低成本，因为它可以在水资源的自然环境中使用。该吸附方法可用于以大规模和经济规模消除任何水体中的双氯芬酸钠。
