城市农业中的重金属污染:来自内罗毕的证据
Mike Murphy1, Githenya Wachira2, Cecilia Onyango2
1International Food Policy Research Institute, Washington, DC, USA. m.murphy@cgiar.org.
Environmental science and pollution research international
|October 31, 2025
概括
奈洛比的城市绿叶植物被,和等重金属污染了. 许多居民超过了安全的每日摄入量水平,突出显示了低收入和中等收入国家 (LMICs) 需要食品监督的需要.
科学领域:
- 环境健康 环境健康
- 食品安全 食品安全
- 城市农业 城市农业
背景情况:
- 城市农业对于低收入和中等收入国家 (LMICs) 的粮食系统至关重要.
- 城市种植的农产品可能会受到环境危害的影响,包括重金属污染.
- 绿叶蔬菜是常见的饮食成分,也是重金属暴露的潜在载体.
研究的目的:
- 在内罗毕县城市种植的绿叶蔬菜中分析重金属污染 (,,).
- 调查道路/工业场所的邻近与重金属含量之间的关系.
- 通过食用绿叶植物来估计人口对重金属的暴露,并评估风险.
主要方法:
- 来自内罗毕县农场的绿叶蔬菜的随机地理采样.
- 使用已确定的方法分析,和含量.
- 空间分析以将污染与污染源的接近相关联.
- 基于消费数据和市场抽样的饮食暴露评估.
主要成果:
- 平均污染水平:0.68 ppm的,0.09 ppm的,0.11 ppm的.
- 在公路附近种植的绿色植物中发现较高的含量;在工业场所附近发现较高的含量.
- 显著比例的成人和儿童超过了,和的参考水平.
- 本地绿菜和进口白菜的污染水平与城市白菜相似.
结论:
- 奈洛比的绿叶植物是城市人口重金属暴露的重要来源.
- 靠近公路和工业区是影响污染水平的关键因素.
- 系统的粮食监测和源减缓在LMIC中至关重要,以保护公共健康.
相关概念视频
Types of Toxins
3.1K
Humans continually engage with an environment rich in potentially harmful chemicals. These are introduced to our bodies through inhalation, ingestion, or skin contact. These chemicals exist in various forms, such as air and environmental pollutants, agricultural chemicals, organic solvents, and heavy metals.
Air pollutants, primarily gases, pose significant threats to respiratory health, leading to conditions like hypoxia, lung cancer, and in extreme cases, death.
Environmental pollutants like...
Air pollutants, primarily gases, pose significant threats to respiratory health, leading to conditions like hypoxia, lung cancer, and in extreme cases, death.
Environmental pollutants like...
3.1K
The Periodic Table and Organismal Elements
22.1K
Elements are the smallest units of matter that cannot be broken down further by chemical processes. There are 118 known elements, but not all of these are naturally occurring, and only a few of them are essential for life. Living matter is composed primarily of carbon, nitrogen, hydrogen, and oxygen, with smaller amounts of other elements like calcium, phosphorus, potassium, and sulfur. Other elements are also necessary for life but only in trace amounts.
Periodic Table Provides Information...
Periodic Table Provides Information...
22.1K
The Periodic Table and Organismal Elements
199.4K
Overview
199.4K


