| 老化对不同种类和粒径微塑料吸附三氯生的影响 |
| 摘要点击 252 全文点击 11 投稿时间：2025-02-22 修订日期：2025-05-26 |
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| 中文关键词 微塑料（MPs） 三氯生（TCS） 粒径 老化 吸附 |
| 英文关键词 microplastics （MPs） triclosan （TCS） particle size aging sorption |
| DOI 10.13227/j.hjkx.202502179 |
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| 中文摘要 |
| 为研究老化对不同种类和粒径的微塑料（MPs）吸附三氯生（TCS）的影响，分析测定了老化0、30和90 d时50 μm和200 μm粒径的聚酰胺（PA）、聚对苯二甲酸丁二醇酯（PBT）、聚乳酸（PLA）和聚氯乙烯（PVC）的理化性质及其对TCS的吸附性. 结果表明，老化显著增加了MPs表面的粗糙度；老化90 d后，除PVC50外，所有MPs的表面氧占比与老化前相比均增加，其中小粒径MPs的增幅更显著；PBT亲水性随老化时间的增加呈先升后降趋势，其余MPs的亲水性随着老化时间的增加而增强. 在同一老化程度下，PA的吸附性强于其它MPs. 老化30 d时，MPs对TCS的吸附性与老化前相比有所提升；但老化90 d后，PBT和PLA的吸附性较老化30 d时出现下降趋势. 研究证实材质特性、表面官能团演变及亲水作用主导的吸附机制共同影响MPs-TCS的相互作用，相关结果为MPs与TCS的复合污染风险评估提供了理论支撑. |
| 英文摘要 |
| In order to investigate the effect of aging on the adsorption of triclosan （TCS） by microplastics （MPs） of different types and particle sizes， the physicochemical properties of polyamide （PA）， polybutylene terephthalate （PBT）， polylactic acid （PLA）， and polyvinyl chloride （PVC） with particle sizes of 50 μm and 200 μm， as well as their adsorption of TCS， were analytically determined under aging at 0， 30， and 90 d. The results showed that the surface roughness of MPs increased significantly. The results showed that aging significantly increased the surface roughness of the MPs. After 90 d of aging， the surface oxygen percentage of all MPs except PVC50 increased compared with that before aging， with the increase being more significant for the small-sized MPs. Further， the hydrophilicity of PBT showed a tendency of increasing and then decreasing with aging time， but the hydrophilicity of the rest of the MPs was enhanced with the increase in aging time. At the same aging level， the adsorption property of PA was stronger than that of other MPs. At 30 d of aging， the adsorption property of MPs on TCS was increased compared with that before aging. However， after 90 d of aging， the adsorption property of PBT and PLA showed a decreasing trend compared with that at 30 d of aging. MPs with smaller particle size had higher adsorption capacity due to more available adsorption sites， while the growth rate of adsorption of larger particle size PA， PLA， and PVC was higher than that of smaller particle size after aging compared with that before aging， whereas PBT had the opposite trend. The study confirms that material properties， surface functional group evolution， and hydrophilic interaction-dominated adsorption mechanism jointly affect the MPs-TCS interaction， and the results provide theoretical support for the risk assessment of MPs-TCS composite contamination. |
