I am looking for references on permissible limits for As, Cr, Cu, Ni, Pb, Zn etc. in mining waste water discharged to streams and stream sediments. Any reference is highly appreciated
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Guideline values for metals in stream sediments of sub-Saharan Africa can vary depending on the specific regulations and standards set by individual countries or international organizations. There isn't a single universal set of guideline values that applies to the entire sub-Saharan African region. Instead, different countries may have their own environmental quality standards and guidelines for metals in sediments based on factors such as local geological conditions, environmental priorities, and potential risks.
For guidance on acceptable levels of metals in stream sediments, researchers, environmental agencies, and mining companies in sub-Saharan Africa typically refer to:
Given the variability in guidelines and regulations across sub-Saharan African countries, it's essential to consult with local environmental authorities, research institutions, and relevant stakeholders when conducting sediment quality assessments or environmental impact assessments. Additionally, international organizations like the United Nations Environment Programme (UNEP) and the African Union (AU) may provide guidance on environmental standards and regulations that can be applicable to the region.
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