半干旱农田中的潜在有毒金属污染:来源,风险分析和空间分布
Minakshi Kaur1, Jaskaran Kaur2,3, Anil Sood1
1Punjab Remote Sensing Centre, Ludhiana, Punjab, India.
Environmental monitoring and assessment
|June 20, 2025
概括
印度农业土壤中的潜在有毒金属 (PTM) 污染对生态构成风险,超过限值. 虽然人类健康风险最小,但土壤管理对于控制PTM水平至关重要.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 农业科学 农业科学
背景情况:
- 全球日益增长的粮食需求加剧了对农业生态系统的压力,特别是在半干旱地区.
- 在半干旱农业中过度使用农业化学品导致土壤中潜在的有毒金属 (PTM) 污染.
- PTM污染对人类和牲畜构成重大环境和健康风险.
研究的目的:
- 评估印度南旁遮普邦农业土壤中五种PTM (Ni,Pb,Cr,Cd,Co) 相关的风险.
- 确定PTM污染源,评估生态和人类健康风险.
主要方法:
- 在旁遮普邦巴丁达区的农业土壤中分析了五种PTM (Ni,Pb,Cr,Cd,Co).
- 主要组件分析 (PCA) 用于来源识别.
- 污染负荷指数 (PLI) 和生态风险指数 (RI) 的计算.
- 物理化学性质和人类健康风险 (非致癌和致癌) 的评估.
主要成果:
- 在一些样本中, (Cd) 度超过了国际允许限值.
- PCA表示母岩是Cr,Co,Ni和Pb的主要来源;酸肥作为Cd的贡献者.
- 高的PLI和RI值表明土壤污染严重,生态风险很大.
- 土壤性和性,有机物质较低;人类健康风险最小.
- 空间分析显示,该地区东部的污染程度较高.
结论:
- 半干旱的旁遮普南部的农业土壤受到PTM的严重污染,造成生态风险.
- 来源识别表明,地质和农业投入都对PTM污染有所贡献.
- 虽然人类健康的直接风险很低,但长期的土壤管理策略对于减轻污染至关重要.
- 需要有针对性的干预措施,特别是在研究区域的东部地区,以控制PTM水平.
相关概念视频
01:36Types of Toxins
2.0K
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...
2.0K
01:26Toxic Reactions: Overview
1.2K
When toxic substances penetrate the human body, they disseminate to various tissues, undergoing metabolic changes. This process yields reactive metabolites that may covalently bind with specific target molecules, resulting in toxicity.
Toxicity falls into two primary categories: local and systemic.
Local toxicity appears at the exposure site, such as protein denaturation caused by caustic substances.
In contrast, systemic toxicity requires the toxic agent's absorption and distribution,...
Toxicity falls into two primary categories: local and systemic.
Local toxicity appears at the exposure site, such as protein denaturation caused by caustic substances.
In contrast, systemic toxicity requires the toxic agent's absorption and distribution,...
1.2K
01:27The Periodic Table and Organismal Elements
20.3K
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...
20.3K