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<p>Contamination by heavy metals in mining area often leads to significant environmental hazards, with bioaccumulation of Cu in the food chain representing a critical pathway for human exposure. To investigate the characteristics of Cu content in major foodstuffs and assess the safety of dietary Cu exposure among residents living near mining areas in Nandan County, China.Dietary intake of Cu in mining-affected and reference area was investigated using the weighing method and chemical analysis. The Chronic Daily Intake (CDI) was calculated, and the potential non-carcinogenic health risks were evaluated. Results showed that Cu concentrations in various food categories were significantly higher in the mining-affected area compared to the reference area. Vegetables were identified as the primary source of dietary Cu exposure in both areas, contributing more than 46% to the total intake. The health risk assessment indicated that the Hazard Quotient (HQ) values for males and females in the mining-affected area were 1.02 and 1.13, respectively, both exceeding the safety threshold of 1. Residents in the mining-affected area of Nandan face potential health risks from dietary Cu exposure. These findings highlight the need for targeted attention and intervention measures to ensure public health safety.</p>

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Dietary exposure and health risk assessment of copper among residents in polymetallic mining areas of southwest China

  • 期刊论文

  • 发表日期：

    2026年6月29日

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  • Yunxia Zhang,
  • Bo Song,
  • Deqian Chen,
  • Zhiyan Ma

摘要

Contamination by heavy metals in mining area often leads to significant environmental hazards, with bioaccumulation of Cu in the food chain representing a critical pathway for human exposure. To investigate the characteristics of Cu content in major foodstuffs and assess the safety of dietary Cu exposure among residents living near mining areas in Nandan County, China.Dietary intake of Cu in mining-affected and reference area was investigated using the weighing method and chemical analysis. The Chronic Daily Intake (CDI) was calculated, and the potential non-carcinogenic health risks were evaluated. Results showed that Cu concentrations in various food categories were significantly higher in the mining-affected area compared to the reference area. Vegetables were identified as the primary source of dietary Cu exposure in both areas, contributing more than 46% to the total intake. The health risk assessment indicated that the Hazard Quotient (HQ) values for males and females in the mining-affected area were 1.02 and 1.13, respectively, both exceeding the safety threshold of 1. Residents in the mining-affected area of Nandan face potential health risks from dietary Cu exposure. These findings highlight the need for targeted attention and intervention measures to ensure public health safety.