微塑料与典型的爱水药品和个人护理产品的吸附行为和相互作用机制
Qizhi Sun1, Lu Liu2, Yichao Gong3
1School of Eco-Environment, Hebei University, Baoding, 071002, China.
Environmental research
|December 16, 2023
概括
生物降解塑料显示药品和个人护理产品 (PPCP) 的吸附比传统塑料强. 聚胺6,可生物降解塑料,氨酸和二因PPCP的显著吸附而带来更高的生态风险.
科学领域:
- 环境科学 环境科学
- 环境化学环境化学
- 材料科学 材料科学 材料科学
背景情况:
- 微塑料 (MP) 和药品和个人护理产品 (PPCP) 是普遍存在的水生污染物.
- 国会议员和PPCP的生态风险是越来越多的研究关注.
研究的目的:
- 评估传统塑料 (TPs) 和可生物降解塑料 (BDPs) 的吸附潜力,用于15种水友性PPCP.
- 识别来自MP-PPCP相互作用的高生态风险的潜在来源.
- 为了阐明在聚胺6 (PA6) 上选择的PPCP的吸附机制.
主要方法:
- 测试了8种塑料类型的120种组合 (5种TP,3种BDP) 和15种PPCP.
- 分析了吸附平衡,分割系数 (Kd) 和影响因素 (pH,离子强度,酸).
- 研究了吸附力,包括静电相互作用,键和疏水相互作用.
主要成果:
- 在120种MP-PPCP组合中,只有24种显示出显著的吸附.
- BDPs比普通TP (PS,PET,PVC) 具有更强的吸附能力.
- 聚胺6 ,BDPs ,胺和二被确定为高风险污染物.
- 在PA6.6上,硫胺 (SA),二 (BP-2) 和二 (CHL) 在24小时内达到吸附平衡.
- Kd值按照以下顺序进行:BP-2 >> SA > CHL.
- 吸附机制涉及静电相互作用,结合和疏水相互作用.
结论:
- MP-PPCP相互作用是复杂的,BDPs具有显著的吸附风险.
- 聚胺6,BDPs,芬因和BP-2需要进一步评估生态风险.
- 了解吸附机制对于管理水生生态系统中MP和PPCP联合污染至关重要.
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