Former landfills as environmental liabilities in central Chile: Evidence from a pilot study in Lepanto

IF 1.5 4区环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES Clean-soil Air Water Pub Date : 2024-07-01 DOI:10.1002/clen.202400085

Jennifer Saa, María José Valdivia, Joaquín Ruiz, Carlos A. Manzano

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Abstract

The former Lepanto landfill in the Santiago Metropolitan Region in Central Chile ceased operations in 2002 after 24 years. Currently, a biogas recovery center operates on this site. The objective of this pilot study was to evaluate the atmospheric concentrations of two polycyclic aromatic hydrocarbons (PAHs, i.e., phenanthrene and fluoranthene) at three points downwind from the former Lepanto landfill using passive air samplers and polyurethane foam disks to provide 3-month average concentrations of contaminants during winter months. The results showed concentrations ranging between 2 and 65 ng m⁻³ and decreasing with distance from the former landfill. Given that the distance to other potential sources was similar in all sampling sites, the evidence found suggested that the former Lepanto landfill may contribute to the local PAH inventory. Thus, we suggest that former landfills are potential candidates for long-term monitoring as they can represent a less-known environmental liability for residents. Additionally, we provide insights on how the Chilean environmental protection system can establish reclamation steps for their management after closure.

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智利中部作为环境负债的旧垃圾填埋场：来自莱潘托试点研究的证据

位于智利中部圣地亚哥大区的前莱潘托垃圾填埋场在运营 24 年后，于 2002 年停止运营。目前，该垃圾填埋场上有一个沼气回收中心。这项试点研究的目的是利用被动式空气采样器和聚氨酯泡沫盘，评估前莱潘托垃圾填埋场下风向三个点的大气中两种多环芳烃（PAHs，即菲和荧蒽）的浓度，以提供冬季污染物的 3 个月平均浓度。结果显示，污染物浓度在 2 至 65 纳克/立方米之间，并随着与前垃圾填埋场距离的增加而降低。鉴于所有采样点与其他潜在污染源的距离相似，所发现的证据表明，前莱潘托垃圾填埋场可能会对当地的多环芳烃库存产生影响。因此，我们建议将前垃圾填埋场作为长期监测的潜在候选地，因为它们可能是居民不太了解的环境责任。此外，我们还就智利环保系统如何在垃圾填埋场关闭后为其管理制定复垦步骤提出了见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Clean-soil Air Water 环境科学-海洋与淡水生物学

CiteScore

2.80

自引率

5.90%

发文量

审稿时长

3.6 months

期刊介绍： CLEAN covers all aspects of Sustainability and Environmental Safety. The journal focuses on organ/human--environment interactions giving interdisciplinary insights on a broad range of topics including air pollution, waste management, the water cycle, and environmental conservation. With a 2019 Journal Impact Factor of 1.603 (Journal Citation Reports (Clarivate Analytics, 2020), the journal publishes an attractive mixture of peer-reviewed scientific reviews, research papers, and short communications. Papers dealing with environmental sustainability issues from such fields as agriculture, biological sciences, energy, food sciences, geography, geology, meteorology, nutrition, soil and water sciences, etc., are welcome.