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聚乙烯微塑料增强了藻类衍生的溶解有机物质的光降解和氨化

Jia Liang¹, Xiao Tan¹, Imran Ali¹

¹Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, PR China.

Journal of hazardous materials

|October 6, 2024

概括

微塑料 (MPs) 通过作为光敏感剂来加速藻类衍生的有机物质 (ADOM) 的分解. 这一过程增加了氨的产生,并将ADOM转化为类似的物质,影响水生生态系统.

科学领域:

环境化学环境化学
水上科学水上科学
有机地化学有机地化学

背景情况:

藻类衍生有机物 (ADOM) 是自然水域中色素溶解有机物 (CDOM) 的重要来源.
在受到太阳辐射时,ADOM经历了降解和转化.
微塑料 (MPs) 作为ADOM光降解中的光敏感剂的作用在很大程度上尚未被探索.

研究的目的:

研究聚烯微塑料 (PS MPs) 对ADOM光降解的影响.
确定MP如何影响在紫外线照射下ADOM的转化产品.
了解MP介导的ADOM转换对水生碳和循环的影响.

主要方法:

ADOM是从四种常见的藻类中提取的.
ADOM样本被暴露在带有和没有PSMP的紫外线辐射中.
分析了降解产物,包括氨基酸类物质和氨.
研究了米类产品的特性.

主要成果:

氨基酸类物质的光降解在存在PSMP时明显更快 (∼38%) 相比对照 (∼22%).
在ADOM+PS组 (1.86毫克L-1),氨的产生比ADOM组 (1.21毫克L-1) 高.
党的国会议员推动了ADOM的高度芳香和化产品的形成,可能是通过自由基和反应性物种的产生.

结论:

微塑料作为环境光敏化剂,加速ADOM光降解和氨产生.
PS的光衰老可以产生增强ADOM转换的反应性物种.
在ADOM中由MP引起的变化可以影响水中碳和循环,突出显示新出现的污染物的影响.

关键词:

来自藻类的溶解有机物.湿化是指化.微塑料是一种微塑料.通过光化进行光化.紫外线辐射辐射的紫外线辐射.

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