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Toxic metal pollution in Africa
1National Water Research Institute, Burlington, Ontario, Canada.
The Science of the Total Environment
|June 30, 1992
Summary
Toxic metal concentrations in African ecosystems are alarmingly high, especially lead pollution in urban areas. Current environmental health standards may not adequately protect vulnerable African populations from these escalating risks.
Area of Science:
- Environmental Science
- Public Health
- Toxicology
Background:
- African ecosystems face unprecedented toxic metal concentrations.
- Urban air quality is severely impacted by contaminated dusts, leading to high ambient metal levels.
- Lead pollution from vehicles and industries poses a significant health hazard, particularly to infants.
Purpose of the Study:
- To highlight the severity of toxic metal pollution in Africa.
- To examine the cultural and lifestyle factors influencing lead exposure.
- To assess the adequacy of existing environmental health criteria for African communities.
Main Methods:
- Review of available scientific literature and data on toxic metal concentrations in African ecosystems.
- Analysis of urban air quality data, focusing on lead.
- Examination of epidemiological data and risk factors for metal poisoning in African populations.
Main Results:
- Toxic metal levels in many African ecosystems are reaching critical, unprecedented highs.
- Urban centers exhibit some of the world's highest ambient toxic metal concentrations due to dust pollution.
- An estimated 15-30% of infants in some African urban areas may suffer from lead poisoning.
Conclusions:
- Lead pollution from automotive and industrial sources is a major public health concern in African cities.
- African populations may be more susceptible to environmental metal poisoning due to cultural and lifestyle factors.
- Existing environmental health criteria for toxic metals developed in industrialized nations may be insufficient for protecting African communities.