Department of Science and Technology, University of Sannio, Via F. De Sanctis, 82100, Benevento, Italy.
DICMAPI, Federico II University, Piazzale V. Tecchio 80, 80125, Naples, Italy.
J Environ Manage. 2021 May 15;286:112168. doi: 10.1016/j.jenvman.2021.112168. Epub 2021 Feb 23.
Composites of two natural zeolites - clinoptilolite and phillipsite, and cationic surfactants (cetylpyridinium chloride and Arquad® 2HT-75) were tested for the removal of two emerging contaminants - ibuprofen and naproxen. For each zeolite-rich rock, two different modifications of the zeolitic surfaces were prepared (monolayer and bilayer surfactant coverage). The influence of the initial drug concentrations and contact time on adsorption of these drugs was followed in buffer solution. The Langmuir model showed the highest adsorption capacity for the composite characterized by a bilayered surfactant at the clinoptilolite surface: 19.7 mg/g and 16.1 mg/g for ibuprofen and naproxen, respectively. Also, to simulate real systems, drug adsorption isotherms were conducted in natural water (Grindstone creek water - Columbia, Missouri, USA) by using the best performing adsorbent; in this case, a slight decrease of drug adsorption was recorded. Kinetic runs were performed in distilled water as well as in the presence of ions such as sulfates and bicarbonates; also, in this case, the interfering agents defined an adsorption decrease for bilayer composites.
两种天然沸石-斜发沸石和丝光沸石与阳离子表面活性剂（十六烷基吡啶氯和 Arquad®2HT-75）的复合材料被测试用于去除两种新兴污染物-布洛芬和萘普生。对于每种富含沸石的岩石，都制备了两种不同的沸石表面改性（单层和双层表面活性剂覆盖）。在缓冲溶液中，研究了初始药物浓度和接触时间对这些药物吸附的影响。Langmuir 模型显示，具有双层表面活性剂的斜发沸石表面复合材料的吸附能力最高：分别为 19.7mg/g 和 16.1mg/g 用于布洛芬和萘普生。此外，为了模拟真实系统，通过使用表现最佳的吸附剂，在天然水中（美国密苏里州哥伦比亚的 Grindstone creek 水）进行了药物吸附等温线实验；在这种情况下，记录到药物吸附略有下降。在蒸馏水以及硫酸盐和碳酸氢盐等离子存在的情况下进行了动力学实验；同样，在这种情况下，干扰剂定义了双层复合材料的吸附减少。
