不同类型的 (老化) 微塑料在土壤中对纳胺的吸附行为和机制
Qing Wang1, Wenjie Ge2, Renyong Shi3
1College of Energy and Environmental Engineering, Hebei Key Laboratory of Air Pollution Cause and Impact, Hebei Engineering Research Center of Sewage Treatment and Resource Utilization, Hebei University of Engineering, Handan, 056038, China.
Chemosphere
|August 30, 2024
概括
微塑料 (MPs) 影响像napropamide这样的胺除草剂与土壤结合的方式. 非可生物降解聚乙烯 (PEM) 和可生物降解聚乙烯基酸甲 (PBATM) MPs都会改变除草剂吸附,影响它们的环境命运和风险.
科学领域:
- 环境化学环境化学
- 土壤科学 土壤科学
- 聚合物科学 聚合物科学
背景情况:
- 微塑料 (MP) 被认为是有机污染物的载体.
- 在土壤中,MPs对胺除草剂吸附的影响仍未得到充分研究.
- 了解MP-除草剂相互作用对于评估土壤污染至关重要.
研究的目的:
- 调查非生物降解 (聚乙烯,PEM) 和生物降解 (聚乙烯基甲甲酸盐,PBATM) MPs 对农业土壤中纳胺 (Nap) 吸附的影响.
- 评估紫外线老化MP对除草剂吸附动态的影响.
- 为了比较Nap在黑土 (BS) 和流水土 (CS) 中的吸附行为,有或没有MP污染.
主要方法:
- 使用两种类型的MP (PEM和PBATM) 和两种类型的土壤 (BS和CS) 进行了批量吸附实验.
- 国会议员接受了一个月的紫外线辐射衰老.
- 确定了纳普的吸附能力 (Qm) 和分布系数 (KF).
- 使用X射线光电谱分析了老年MP的表面特性及其与土壤颗粒的相互作用.
主要成果:
- 睡眠吸附到PEM主要是物理的,而化学机制对PBATM有意义.
- 在0.2%的MP度下,土壤-PEM比土壤-PBATM显示出更高的Qm和KF;在2%的度下,土壤-PBATM显示出更高的值.
- 紫外线老化增加了MP表面积,增强了土壤颗粒的粘附力,改变了吸附抑制效应.
- 黑土 (BS) 始终表现出比流水土 (CS) 更高的NAP吸附能力,无论MP是否存在.
结论:
- 微塑料显著改变了农业土壤中napropamide的吸附.
- 大众除草剂的类型,度和老化会影响除草剂吸附机制和土壤相互作用.
- 这些变化影响土壤生态系统中的napropamide流动性和相关的环境风险.
更多相关视频
相关概念视频
Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Absorption
As individuals age, their body's physiology evolves, affecting drug pharmacokinetics. The most apparent changes occur in the gastrointestinal tract, where an increase in gastric pH, a delay in gastric emptying, and a reduction in gastrointestinal motility are observed. Remarkably, these changes do not substantially modify the absorption of orally administered drugs, particularly those absorbed via passive diffusion.Transdermal drug delivery emerges as a highly viable method for older adults due...
Bioplastics
Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...
Microbial Bioremediation of Plastics
Polyethylene terephthalate (PET) is a synthetic polymer widely utilized in the packaging industry, particularly for bottles and containers. Due to its chemical stability and durability, PET accumulates in the environment, contributing significantly to plastic pollution. It comprises repeating units of terephthalic acid and ethylene glycol, resulting in a semi-crystalline structure that is resistant to natural degradation processes.A notable breakthrough in plastic biodegradation came with the...


