Faculty of Environmental Science & Engineering, Kunming University of Science & Technology, Kunming, Yunnan, China.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2010 Oct;45(12):1625-34. doi: 10.1080/10934529.2010.506127.
The environmental risks of wide application and occurrence of antibiotics have attracted great concern but their environmental behaviors are still unclear. The fast development of nanotechnology also arise environmental concerns, one of which is that the discharge of nanomaterials into the environment may alter the environmental behavior and risks of various contaminants. This study conducted batch adsorption experiments of sulfamethoxazole (SMX), a widely studied antibiotic, on various carbon nanotubes (CNTs) and sediment particles. The SMX adsorption data on other natural adsorbents were also collected from literature. The surface area of CNTs is an important parameter controlling their adsorption to SMX. Other properties, including diameters and surface functional groups, were also observed to be important in regulating SMX adsorption. Inorganic mineral particles have comparable adsorption coefficients with other natural sorbents including soils, sediments and sludges, suggesting the contribution of inorganic fractions to SMX adsorption could not be ignored and the normalization of adsorption coefficient by organic carbon content should be avoided. The adsorption coefficients of SMX on CNTs were generally two orders of magnitude higher than other natural sorbents. The presence of CNTs in the environment, especially in waste water and solid waste of water treatment plant, could greatly alter SMX behavior as well as its risks.
抗生素的广泛应用和出现所带来的环境风险引起了极大关注，但它们的环境行为仍不清楚。纳米技术的快速发展也引起了环境方面的关注，其中之一是纳米材料排放到环境中可能会改变各种污染物的环境行为和风险。本研究进行了磺胺甲恶唑（SMX）作为一种广泛研究的抗生素在各种碳纳米管（CNT）和沉积物颗粒上的批量吸附实验。还从文献中收集了其他天然吸附剂上 SMX 的吸附数据。CNT 的表面积是控制其对 SMX 吸附的重要参数。其他性质，包括直径和表面官能团，也被观察到对 SMX 吸附具有重要调节作用。无机矿物颗粒与其他天然吸附剂（包括土壤、沉积物和污泥）具有可比的吸附系数，这表明无机部分对 SMX 吸附的贡献不容忽视，并且应该避免通过有机碳含量来归一化吸附系数。SMX 在 CNT 上的吸附系数通常比其他天然吸附剂高出两个数量级。CNT 存在于环境中，特别是在废水和水处理厂的固体废物中，可能会极大地改变 SMX 的行为及其风险。
