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在自然老化的塑料垃圾中,可替换的与残留金属相比

Sajjad Abbasi^1,2, Andrew Turner³, Katarzyna Jędruchniewicz⁴

¹Department of Radiochemistry and Environmental Chemistry, Faculty of Chemistry, Maria Curie-Skłodowska University, 20-031, Lublin, Poland. sajjad.abbasi.h@gmail.com.

Environmental science and pollution research international

|March 4, 2024

概括

这项研究分析了来自波兰的塑料垃圾中的金属含量和可用性. 结果显示金属度的高变化,铁是最丰富的,影响环境风险评估.

科学领域:

环境化学环境化学
材料科学材料科学材料科学
生态毒理学生态毒理学

背景情况:

塑料垃圾中的金属来源于制造添加剂或环境吸收.
金属和塑料之间的关联往往定义不完善,阻碍了准确的风险评估.
了解塑料复合材料中的金属可用性对于环境影响评估至关重要.

研究的目的:

量化和描述金属度和在各种塑料垃圾类型中的可用性.
使用标准化的顺序提取协议来区分可用和残留的金属部分.
评估金属塑料协会对环境风险评估的影响.

主要方法:

根据聚合物类型 (PE,PET,尼龙,EPS,PP,混合) 收集和分离22个塑料垃圾样本.
样品的微小化以小于2毫米的颗粒大小.
序列提取协议 (Bureau Communautaire de Reference; BCR) 用于确定可溶于酸的,可交换的和残留的金属部分 (Cd,Co,Cr,Cu,Fe,Mn,Ni,Pb,Zn).

主要成果:

总金属含量在不同地点和聚合物类型之间存在显著差异,表明添加剂分布异质.
铁 (Fe) 度最高 (数百至数千毫克千克-1),而 (Cd), (Co) 和 (Ni) 最低 (<10毫克千克-1).
在所有聚合物类型中,扩展聚乙烯 (EPS) 的金属可用性中位数最高, (Mn) 和 (Zn) 超过25%, (Cr) 和铁 (Fe) 低于10%.

结论:

塑料垃圾的成分显著影响金属度和生物可用性.
该方法允许直接比较塑料中的金属含量与环境固体,有助于风险评估.
区分环境吸收和添加剂来源是了解金属从塑料垃圾中的移动性的关键.

关键词:

添加剂添加剂添加剂在BCR的顺序提取过程中.是的组成部分.领导领导领导领导领导塑料塑料是一种塑料.聚合物聚合物聚合物

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