持久有机污染物在开放式燃烧城市固体废物场所的环境分布和生物降解性
Oumaima Rejeb1, Nosra Methneni1, Sabrine Afsa1,2
1Research Laboratory of Analysis and Process Applied on the Environmental - APAE, Higher Institute of Applied Sciences and Technology Mahdia, University of Monastir, Monastir, Tunisia.
概括
公开倾倒和焚烧城市固体废物 (MSW) 污染了环境的持久性有机污染物 (POP). 在飞灰和植物中积累的POPs,在大多数矩阵中生物降解性有限.
科学领域:
- 环境化学环境化学
- 环境科学 环境科学
背景情况:
- 公开倾倒和焚烧城市固体废物 (MSW) 是具有成本效益的,但会带来重大的环境和健康风险.
- 持久性有机污染物 (POP),包括多二 (PCB) 和多环芳 (PAH),由于其持久性和毒性,引起了全球关注.
研究的目的:
- 评估在突尼斯马赫迪亚的一个MSW燃烧场所周围的各种环境矩阵中的POP污染水平和分布.
- 用经合组织301F测试在不同的矩阵中评估POPs的生物降解性.
主要方法:
- 在地表水,沉积物,土壤,土壤液,飞灰和草植物中的22种POP (13种PCB,9种PAH) 的量化.
- 使用气体染色学加上单四极质谱法 (GC-MS/MS) 的分析.
- 生物降解性评估通过经合组织301F微度呼吸计.
主要成果:
- 观察到大量的POP积累,特别是在飞灰和草植物样本中.
- 基烯和氨酸是主要的PAHs.
- 在飞和植物材料中发现了最高的PCB和PAH度,而地表水显示了最低的水平.
- 表面水和草植物中的POP显示出高生物降解率 (>90%在28天内).
- 其他基质 (土壤,沉积物,液,飞灰) 的降解程度有限 (<60%),表明其不能生物降解.
结论:
- 开放式燃烧MSW导致周围环境中大量的POP污染,飞和植物充当了重要的水槽.
- 虽然水和植物组织中的POP显示出降解的潜力,但土壤,沉积物和飞灰中的POP是持久的.
- 有效的废物管理策略至关重要,以减轻POP释放和MSW燃烧场所的环境污染.
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