来自斯里兰卡的城市固体废物堆肥中的塑料和塑料结合的有毒金属
K S D Premarathna1, N Gayara Degamboda2, B H R Fernando3
1Ecosphere Resilience Research Centre, Faculty of Applied Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka.
Environmental geochemistry and health
|July 13, 2024
概括
斯里兰卡的堆肥中塑料污染很高,有毒金属含量低于推值. 尽管如此,塑料摄入对生态系统和人类健康构成风险,需要采取减少策略.
科学领域:
- 环境科学 环境科学
- 分析化学 分析化学
- 土壤科学 土壤科学
背景情况:
- 城市固体废物堆肥是一种有价值的土壤修补剂.
- 塑料污染是一个日益严重的全球问题,影响环境质量.
- 了解堆肥中塑料和有毒金属的同时存在对于风险评估至关重要.
研究的目的:
- 量化斯里兰卡堆肥中的塑料丰富度和类型.
- 为了确定堆肥中有毒金属 (Cd,Cu,Co,Cr,Pb,Zn) 的度和生物可用性.
- 评估堆肥中塑料和金属的污染水平和潜在风险.
主要方法:
- 通过密度分离和识别的塑料提取,使用福里埃变换红外光谱法 (FTIR).
- 堆肥和塑料的酸性消化用于总金属分析 (Cd,Cu,Co,Cr,Pb,Zn).
- 使用0.01 M CaCl2分析金属的生物可用性,并计算污染指数.
主要成果:
- 塑料,主要是聚乙烯,聚烯和纤维素,在堆肥样本中是丰富的.
- 平均Cd,Cu,Co,Cr,Pb和Zn度低于推的安全水平.
- 和显示出相当大的增强和中等的生物可用性,而其他金属的污染水平较低.
结论:
- 虽然金属含量通常是安全的,但堆肥中的塑料污染存在生态和健康风险.
- 需要有效的战略来减少堆肥中的塑料和金属污染.
- 需要进一步研究塑料与金属在堆肥中的相互作用的长期影响.
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