Maja Vujić, Sanja Vasiljević, Tajana Simetić, Branko Kordić, Jelena Molnar Jazić, Jasmina Agbaba, Aleksandra Tubić
University of Novi Sad Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, Trg Dositeja Obradovića 3, 21000 Novi Sad, Republic of Serbia.
University of Novi Sad Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, Trg Dositeja Obradovića 3, 21000 Novi Sad, Republic of Serbia.
Sci Total Environ. 2024 Dec 15;956:177383. doi: 10.1016/j.scitotenv.2024.177383. Epub 2024 Nov 6.
Wastewater treatment plants play a crucial role in managing environmental pollutants, but they often release persistent contaminants like synthetic microplastic fibers (MPFs) into ecosystems. These microplastics, mainly from the textile industry and domestic washing of synthetic fabrics, are a major type of microplastic found in aquatic environments. Some harmful chemicals have an affinity for these microplastics, making them vectors for contaminants. This study investigates the adsorption of 4-methylbenzylidene camphor (4-MBC), an organic UV filter, onto microplastic fibers from two different sources. Batch experiments conducted at room temperature (25 °C) under laboratory conditions assessed the adsorption kinetics and mechanisms. Morphological and visual characterization of the microplastic fibers was done using optical microscopy and scanning electron microscopy (SEM), revealing diverse shapes, types, and colors. Physico-chemical properties were confirmed through thermogravimetric analysis (TGA) and Fourier-transform infrared spectroscopy (FTIR). The data matched well with the PSO kinetic model and Langmuir isotherm, indicating monolayer chemisorption with equilibrium achieved within 24 h. The adsorption mechanisms involved electrostatic attraction, hydrogen bonding, and π-π interactions. Both types of microplastic fibers exhibited a tendency to adsorb 4-MBC, indicating the significance of this research in understanding the interactions between this compound and various fiber types emphasizing the need for further research under the different environmental conditions.
污水处理厂在管理环境污染物方面发挥着关键作用，但它们经常将合成微塑料纤维（MPFs）等持久性污染物释放到生态系统中。这些微塑料主要来自纺织业和合成织物的家庭洗涤，是在水生环境中发现的主要微塑料类型。一些有害化学物质对这些微塑料具有亲和力，使其成为污染物的载体。本研究调查了有机紫外线过滤剂4-甲基亚苄基樟脑（4-MBC）在两种不同来源的微塑料纤维上的吸附情况。在实验室条件下于室温（25°C）进行的批量实验评估了吸附动力学和机制。使用光学显微镜和扫描电子显微镜（SEM）对微塑料纤维进行了形态学和视觉表征，揭示了其多样的形状、类型和颜色。通过热重分析（TGA）和傅里叶变换红外光谱（FTIR）确定了物理化学性质。数据与PSO动力学模型和朗缪尔等温线匹配良好，表明为单层化学吸附，在24小时内达到平衡。吸附机制包括静电吸引、氢键和π-π相互作用。两种类型的微塑料纤维都表现出吸附4-MBC的趋势，表明本研究在理解该化合物与各种纤维类型之间的相互作用方面具有重要意义，强调了在不同环境条件下进行进一步研究的必要性。
