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微塑料作为Pb2+和Cd2+的吸附剂:对聚烯,聚化,高密度聚乙烯和低密度聚乙烯进行比较研究

Tae-Jung Ha¹, Woo-Ri Lim², Junyong Heo¹

¹Division of Earth Environmental System Sciences-Major of Earth & Environmental Sciences, Pukyong National University, Busan 48513, South Korea.

Journal of contaminant hydrology

|December 31, 2024

概括

不同的微塑料 (MP),如聚烯 (PP) 和聚乙烯 (PVC) 吸附重金属,影响水生环境. 这项研究表明,PP和PVC是重金属运输的重要载体,需要进一步评估环境风险.

科学领域:

环境科学环境科学
材料科学材料科学材料科学
分析化学分析化学

背景情况:

水生环境中的微塑料可以吸附重金属,引发环境问题.
了解不同重金属的各种MP的吸附行为至关重要.

研究的目的:

描述四种类型的MP:聚烯 (PP),聚乙烯 (PVC),高密度聚乙烯 (HDPE) 和低密度聚乙烯 (LDPE).
确定这些MP的Pb2+和Cd2+吸附性质,以评估它们作为重金属吸附剂的潜力.

主要方法:

使用扫描电子显微镜 (SEM) 与能量分散式X射线光谱仪 (EDS),布鲁纳尔-埃梅特-泰勒 (BET) 分析和富里埃变换红外光谱 (FTIR) 进行MP的表征.
分析吸附数据,使用Langmuir和Freundlich异热模型来评估吸附能力.
使用2D-COS FTIR来了解功能组对吸附的影响.

主要成果:

含有氧的功能组 (基,碳基,碳基) 的存在显著影响Pb2+和Cd2+对PP和PVC的吸附.
最大吸附能力 (Q_m) 为PP的0.759毫克/克,而PVC的0.495毫克/克.
Pb 的吸附效率顺序为 2+: PP > LDPE > PVC > HDPE. 对于Cd2+:PP>PVC>LDPE>HDPE. 这是一个很好的例子.

结论:

微塑料,特别是PP和PVC,可以作为水生生态系统中重金属运输的载体.
吸附能力与MP的类型和特定功能组的存在有关.
为了充分了解MP作为重金属载体对环境的影响,进一步的研究是必不可少的.

关键词:

吸附方式吸附方式吸附方式美国的FTIR是FTIR.重金属是一种重金属.微塑料 (MPs) 是一种微塑料.聚烯 (PP) 是一种聚烯.聚乙烯化物 (PVC) 的使用

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