Impact of gold mining on the water quality of the lom river, Gankombol, Cameroon

Ayiwouo, Mouhamed Ngounouno; Yamgouot, Fadimatou Ngounouno; Mambou, Luc Leroy Ngueyep; Kingni, Sifeu Takougang; Ngounouno, Ismaı̈la

doi:10.1016/j.heliyon.2022.e12452

Cited by 12 publications

(1 citation statement)

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“…Bella Atangana et al [97] investigated the seasonal variability of Hg contamination of stream water in the Lom gold basin from ASGM, where the dry and wet season mean concentrations were 0.007 and 0.008 mg/L, respectively. In contrast, Ayiwouo et al [98] observed a higher dry season mean value (0.005 mg/L) and a lower wet season mean value (0.004 mg/L) for Hg concentration in the Lom River, Gankombol region.…”

Section: Central Africamentioning

confidence: 81%

Aquatic Mercury Pollution from Artisanal and Small-Scale Gold Mining in Sub-Saharan Africa: Status, Impacts, and Interventions

Mulenga,

Ouma,

Monde

et al. 2024

Water

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Mercury (Hg) pollution remains an environmental global concern due to its non-degradable and toxic nature. Natural and anthropogenic sources of Hg adversely affect the functioning of aquatic ecosystems and biological processes. In sub-Saharan Africa (SSA), unregulated artisanal and small-scale gold mining (ASGM) contributes up to 20% of global gold production and uses 205–496 tonnes/yr of Hg. Despite being a vital economic driver for 20–30 million people, ASGM threatens the health of aquatic systems from Hg pollution, presenting a complex challenge that demands urgent interventions. This review seeks to (1) establish the current status of aquatic Hg pollution, (2) explore the environmental impacts of aquatic Hg, and (3) highlight the proposed interventions for aquatic Hg pollution in SSA. We examined publications and institutional reports between 2000 and 2023 addressing aquatic Hg pollution, impacts, and interventions in the ASGM of SSA. Results indicate a rise in aquatic Hg pollution due to the expansion and intensification of ASGM. West Africa remained the highest contributor (50.2%), followed by Central Africa (39.6%), Southern Africa (9.6%), and Eastern Africa (<1%). Contamination of freshwater ecosystems, toxicity to aquatic biota, and environmental health risks to humans were evident. Alternative Hg-free ASGM technologies, including physical, metallurgical, and pyrometallurgical, were investigated from case studies and recommended for adoption.

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Section: Central Africamentioning

confidence: 81%