期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
Impending Pollution of Betare Oya Opencast Mining Environment (Eastern Cameroon) 被引量:2
1
作者 Tehna Natanael Nguene Feudoung Daniel +4 位作者 Etame Jacques Medza Ekodo Jean Marc noa tang sylvie Sub Emmanuel Cheo Bilong Paul 《Journal of Environmental Science and Engineering(B)》 2015年第1期37-46,共10页
Mining resources are offered by the natural milieu and liable to exploitation. Raw materials extracted are essential for jewellery and economy. But in most cases, the environmental impact assessment is disappointing. ... Mining resources are offered by the natural milieu and liable to exploitation. Raw materials extracted are essential for jewellery and economy. But in most cases, the environmental impact assessment is disappointing. In this study conducted at Betare Oya, mining residues are directly disposed in the immediate environment without passing through the tailing ponds for treatment, despite environmental laws and standards. Soluble components of matter are slowly dissolved, drained by meteoric water and flowed into tail bay vicinity. Soil and mining residues were sampled in Mari, Mbigala, Mboufa and Bedobo, respectively, four sub-watershed of Lom, the main river of the region. Concentration of nine MTE (metallic trace elements): As, Cd, Cr, Cu, Co, Ni, Pb, Zn and Hg were determined by ICP-MS (inductively coupled plasma-mass spectrometry). Highest concentrations of trace and toxic metals in soil and mining residues are: Cr (210 mg·kg-1) 〉 Zn (136 mg·kg-1) 〉 Ni (64 mg·kg-1) 〉 As (34 mg·kg-1) 〉 Cu (30 mg·kg-1) 〉 Pb (25 mg·kg-1) 〉 Co (17 mg·kg-1) 〉 Cd (0.5 mg·kg-1) 〉 Hg (0.1 mg·kg-l), respectively. These results let assume that it is a risk of environmental pollution and poisoning relative to these elements around Betare Oya opencast mining area, with impact on human health. 展开更多
关键词 MINING mounds mining residues POLLUTION metallic trace elements toxicology.
下载PDF
Lixiviation of Open-Coast Dumping Site and Pollution of Water and Soils of Edea Industrial Zone(Littoral-Cameroon)
2
作者 noa tang sylvie Nguene Feudoung Daniel +2 位作者 Etame Jacques Bayiga Elie Constantin Bilong Paul 《Journal of Environmental Science and Engineering(B)》 2013年第5期289-298,共10页
The nexus between water, food and energy is one of the most fundamental relationships and challenges for society. Indeed, seepage of wastes stored into dumping sites of Edea township, favor their lixiviation. Soluble ... The nexus between water, food and energy is one of the most fundamental relationships and challenges for society. Indeed, seepage of wastes stored into dumping sites of Edea township, favor their lixiviation. Soluble components of matter are slowly dissolves, drained by meteoric water and flowed into tail bay vicinity. Knowledge of trace and toxic metal concentrations in the biotic matrices is important for assessing the effects of pollutants and the risk of exposure. In this study, A1, Mn, Cd, Cr, Cu, Pb and Zn were quantified respectively in 33 samples of soil and water, using ICP-MS (Inductively Coupled Plasma Mass Spectrometry), Pb were found between 1.38-88.28 mg/L. Higher concentrations of Al were found in Alucam industrial wastes (315,502.33 mg/kg), and in Hysacam domestic wastes (54,126.93 mg/kg). Concentrations of Cd (1.955 mg/kg), Pb (469.00 mg/kg) and Zn (853.00 rng/kg) are higher in domestic wastes. The ones of Mn (696.96 mg/kg) and Cu (1,320.10 mg/kg) are higher in industrial wastes. Higher concentrations of Pb and Cu let assume that it is a risk of poisoning relative to these elements around this area. These findings illustrate that lixiviation of dumping wastes has great influence on water and soils pollutions of the study ecosystem. 展开更多
关键词 Dumping site lixiviation metallic trace elements POLLUTION chemical intoxications
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部