在土壤溶液和根排液中从塑料中提取重金属和基本元素的可提取性和植物毒性
Katarzyna Jędruchniewicz1, Aleksandra Bogusz2, Marcin Chańko1
1Department of Radiochemistry and Environmental Chemistry, Faculty of Chemistry, Maria Curie-Skłodowska University, Maria Curie-Sklodowska Sq. 3, 20-031 Lublin, Poland.
The Science of the total environment
|August 9, 2023
概括
塑料废物会将金属释放到环境中,而土壤溶液是造成最多的液. 不同的塑料,如LDPE,PET和PP释放不同的金属污染物,影响植物生长.
科学领域:
- 环境科学 环境科学
- 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:
- 越来越多的塑料废弃物由于污染物泄漏而带来环境风险.
- 了解普通塑料 (LDPE,PET,PP) 的金属释放对于环境风险评估至关重要.
研究的目的:
- 为了评估LDPE,PET和PP塑料的金属释放效率.
- 评估土壤溶液类型,人工根排液和蒸水对金属炼的影响.
- 研究塑料提取物对植物发芽和生长的影响.
主要方法:
- 从LDPE,PET和PP中释放的金属使用各种溶液量化:土壤溶液,人工根排泄物和蒸水.
- 分析了影响金属释放的因素,包括pH值,溶解有机碳 (DOC) 和电导率 (EC).
- 评估了塑料提取物对Lepidium sativum发芽和生长的影响.
主要成果:
- 金属释放量因塑料类型和溶液而异. 土壤溶液促进了最有效的浸,其次是根排液,然后是蒸水.
- 在LDPE中,Cu和Na的释放量最高;PP释放量最高的Fe;PET释放量最高的Cr. 和的释放因塑料和溶液而异.
- 在LDPE中,Fe,Cr,Mg和Zn从土壤溶液中吸附最强.
- 塑料提取物对Lepidium sativum的发芽和生长产生了负面影响.
结论:
- 塑料的类型和周围的溶液显著影响金属污染物的释放.
- 像pH,DOC和EC这样的环境因素对金属从塑料中浸的程度起着作用.
- 塑料出物具有生态毒理学风险,影响植物发育,并可能进入食物链.
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