生物基础肥料处理土壤中的有机污染物:目标和可疑选方法
Supta Das1, Rick Helmus1, Yan Dong1
1Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, Netherlands.
Chemosphere
|June 28, 2023
概括
生物基肥料 (BBF) 可以提高农业的可持续性,但存在对有机污染物的担忧. 这项研究在土壤中发现了很少的BBF特异性污染物,这表明其他来源可能对土壤污染有更大的贡献.
科学领域:
- 环境化学环境化学
- 农业科学 农业科学
- 土壤科学 土壤科学
背景情况:
- 生物基肥料 (BBF) 通过回收富含营养的废物流,为化学肥料提供了可持续的替代品.
- BBF中的潜在有机污染物引起了人们对土壤残留物积累和环境风险的担忧.
- 评估BBF修改土壤中的污染物水平对于评估BBF应用的整体可持续性和安全性至关重要.
研究的目的:
- 调查各种BBF处理的农业土壤中有机污染物的存在和类型.
- 优化BBF修改土壤中检测和量化有机污染物的分析方法.
- 为了区分BBF产生的污染物与其他环境来源.
主要方法:
- 分析了来自两个实地研究的土壤样本,修改了15个不同的BBF.
- 基于QuEChERS的优化提取和液态色谱四极飞行质谱时间 (LC-QTOF-MS) 用于污染物分析.
- 使用patRoon软件和NORMAN优先清单进行了目标分析和嫌疑人选,以进行全面的污染物概况.
主要成果:
- 在35个目标污染物中,只有3个被检测到在BBF处理的土壤中,其中2个也被发现在对照样本中.
- 嫌疑人查暂时确定了20种化合物,主要是药品和工业化学品,现场之间只有有限的重叠.
- 来自兽医和污泥衍生BBF的污染概况显示出相似之处,特别是在检测到的药品中.
结论:
- 该研究检测到有限数量的有机污染物直接归因于BBF应用.
- 嫌疑人查表明,BBF可能不是农业土壤中许多检测到的有机污染物的主要来源.
- 对替代污染源的进一步调查是有必要的,以充分了解与BBF使用相关的风险.
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