State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, PR China.
State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, PR China.
Chemosphere. 2024 Jan;348:140651. doi: 10.1016/j.chemosphere.2023.140651. Epub 2023 Nov 21.
Oil spills lead to a substantial depletion of aquatic biodiversity. The mitigation of an oil spill can entail considerable financial outlays, give rise to consequential environmental impacts, and present formidable operational complexities. In this research, hollow hydroxyapatite particles with enhanced oil adsorption characteristics were prepared by surface modification with stearic acid. Peanut and vacuum pump oils were used to imitate oil spills and conduct adsorption tests. The 50% stearic acid-modified hydroxyapatite (Sa/HAP) adsorbent showed superior hydrophobic properties with respect to water contact angle data. Adsorption isotherm analysis revealed that the adsorption processes of peanut and vacuum pump oils matched well with the Sips isotherm model, with regression coefficients of 0.992 and 0.996, respectively. The oil adsorption by the modified hydroxyapatite (HAP) adsorbent was found to be 9.85 g·g for peanut oil and 12.13 g·g for vacuum pump oil. Furthermore, the adsorption kinetics performance was determined by chemical interaction, whereas the adsorption equilibrium capacities were 8.97 g·g and 11.41 g·g, respectively. Recycling of the spent adsorbent was performed with toluene stripping. The synthesized oil-adsorbents were analyzed by SEM, FTIR, XRD, contact angle, and TGA analyses. Hence, the efficacy of the Sa/HAP material as a potential adsorbent for the purification of oil-contaminated water was established, attributed to its commendable oil adsorption capability.
溢油会导致水生生物多样性大量减少。溢油的缓解可能需要大量的资金支出，会产生相应的环境影响，并带来复杂的操作难题。在这项研究中，通过用硬脂酸进行表面改性，制备了具有增强吸油特性的中空羟基磷灰石颗粒。使用花生油和真空泵油来模拟溢油并进行吸附试验。50%硬脂酸改性羟基磷灰石（Sa/HAP）吸附剂的水接触角数据表明其具有优越的疏水性。吸附等温线分析表明，花生油和真空泵油的吸附过程均符合 Sips 等温线模型，拟合度分别为 0.992 和 0.996。改性羟基磷灰石（HAP）吸附剂对花生油的吸附量为 9.85 g·g，对真空泵油的吸附量为 12.13 g·g。此外，吸附动力学性能由化学相互作用决定，而吸附平衡容量分别为 8.97 g·g 和 11.41 g·g。用甲苯萃取法对用过的吸附剂进行了回收。通过 SEM、FTIR、XRD、接触角和 TGA 分析对合成的吸油剂进行了分析。因此，Sa/HAP 材料作为一种潜在的吸附剂，用于净化受油污染的水是有效的，这归因于其卓越的吸油能力。
