火灾后的土壤危害:更新土壤测试协议和清除值的建议
Joseph G Allen1, Parham Azimi2, Gen Pei2
1Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA. jgallen@hsph.harvard.edu.
Journal of exposure science & environmental epidemiology
|August 8, 2025
概括
洛杉矶的城市野火增加了儿童接触土壤的风险. 目前的清洁方法不足,需要强制进行补救后的土壤测试和较低的标准,以保护公共健康.
科学领域:
- 环境健康 环境健康
- 毒理学 毒理学 毒理学
- 城市规划 城市规划
背景情况:
- 洛杉矶的城市野火增加了土壤中暴露的风险,尤其是儿童.
- 现有的野火后土壤修复方案可能无法充分保护受影响社区的公共卫生.
研究的目的:
- 评估目前在洛杉矶城市野火后的土壤修复实践的有效性.
- 提出旨在减轻暴露风险的政策建议.
主要方法:
- 审查加利福尼亚州的野火残骸清除协议,土壤测试程序和暴露健康基准.
- 对最近火灾后土壤测试数据的分析以及加利福尼亚州的初步修复目标 (PRG) 的科学基础.
主要成果:
- 超过20%的物业甚至在修复后也超过了值,这表明协议不足.
- 加利福尼亚州目前的80毫克/千克的住宅土壤PRG不是健康保护,缺乏对毒性基准的遵守以及对儿童暴露风险的当前科学理解.
结论:
- 在野火后的修复中存在关键差距,使洛杉矶居民,特别是儿童,易受暴露的影响.
- 政策改革,包括强制确认土壤测试和将PRG降至55毫克/公斤,对于加强环境健康保护至关重要.
- 实施这些措施为受不断升级的城市野火威胁影响的社区提供了更安全的未来.
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