Muimba-Kankolongo et al. 2022 — Mining-linked trace metals across water, crops, air, and urine in Zambia and the DR Congo
This paper examines mining-linked trace metal contamination across drinking water, food crops, ambient air, and urine, with special attention to mining areas in Zambia and the DR Congo. It is an a3 pathway and source-attribution paper with a strong a4 health layer. The study is useful because it ties contamination of roots, tubers, vegetables, and fruits to a broader mining landscape instead of presenting crop contamination in isolation.
Key numbers
- In the DRC, mean water concentrations were reported as Mn 5454.6 ug/L, Zn 2552.2 ug/L, Cd 138.7 ug/L, Pb 39.7 ug/L, Cu 2361.1 ug/L, and U 21.4 ug/L.
- In Zambia, corresponding mean water concentrations were Mn 108.9 ug/L, Zn 543.3 ug/L, Cd 0.3 ug/L, Pb 0.2 ug/L, Cu 1.5 ug/L, and U 0.5 ug/L.
- The paper reports that Ni, Pb, and Cd were higher in almost all food crops sampled, while Cu was especially elevated in Cucurbita maxima and Amaranthus hybridus.
- Urine samples from the DRC contained trace metals, with children more contaminated than adults.
Methods (brief)
Food samples were analyzed by ICP-OES, while water and urine samples were analyzed by ICP-MS. The study combines chemical measurements with questionnaire evidence on environmental damage and health concerns in mining-adjacent communities.
Evidence Fitness
Strong for a3 source/pathway and a4 health framing. The paper spans many matrices and should not be used as a single-row market benchmark source, but it is valuable for documenting how mining contamination propagates through water, crops, air, and human biomonitoring in the central African Copperbelt.
Implications
Supply-chain: This is a strong source-attribution and environmental-burden paper for mining regions where crop contamination is driven by water, air, and soil co-exposure.
Health: The urine findings and child-adult contrast make it useful for exposure and vulnerable-population pages in addition to crop-pathway documentation.
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