Mining activities are among the major culprits of the wide occurrences of soil and water pollution by PAHs in coal district, which have resulted in ecological fragilities and health risk for local residents. Sixteen PAHs in multimedia environment from the Heshan coal district of Guangxi, South China, were measured, aiming to investigate the contamination level, distribution and possible sources and to estimate the potential health risks of PAHs. The average concentrations of 16 PAHs in the coal, coal gangue, soil, surface water and groundwater were 5114.56, 4551.10, 1280.12 ng g(-1), 426.98 and 381.20 ng L(-1), respectively. Additionally, higher soil and water PAH concentrations were detected in the vicinities of coal or coal gangue dump. Composition analysis, isomeric ratio, Pearson correlation analysis and principal component analysis were performed to diagnose the potential sources of PAHs in different environmental matrices, suggesting the dominant inputs of PAHs from coal/coal combustion and coal gangue in the soil and water. Soil and water guidelines and the incremental lifetime risk (ICLR) were used to assess the health risk, showing that soil and water were heavily contaminated by PAHs, and mean ICLRcoal/coal-gangue and mean ICLRsoil were both significantly higher than the acceptable levels (1 × 10(-4)), posing high potential carcinogenic risk to residents, especially coal workers. This study highlights the environmental pollution problems and public health concerns of coal mining, particularly the potential occupational health hazards of coal miners exposed in Heshan.
In this paper, we discussed the gangue on the mining area that have bad economic and environmental impact. It has been shown that the coal gangue accumulation could seriously prevent the regional ecological and economic sustainable development. Pollution control technology is the key to solve this problem. So we analyzed it and divided it into three categories: coal gangue prophylaxis and treatment technology of pollution and geologic hazard, coal gangue hill vegetation restoration technology and coal gangue comprehensive utilization technology.
Luziping phosphate mining area is the representative of phosphate mining field in Western Hubei. On the base of stern the status of mine eco-environment status in Luziping phosphate mining area, this paper put forward governance measure to recover land to holt and arable land. The research will point out directions and measure for reclamation of other similar areas.
The study aims to find a new and effective way to treat petroleum city's contaminated land, and promote the sustainable development of resource-based cities. Qianjiang City combined petroleum-contaminated land remediation with National Mine Park construction, took three modes to treat different degrees of contaminated soils in the Mine Park. Finding out that the petroleum-contaminated treatment site can become Mine Park popular science education base, while Mine Park construction could provide scientific research places and more funds for treatment project. It is conducive to resource-exhausted city to achieve Economic Transition. Combining petroleum-contaminated land treatment and Mine Park construction is a new practical and effective treatment model to restore the ecological environment in petroleum city.
In order to meet the requirements for flood prevention, the blocked river channel of a certain phosphate mine area which located in the Three Gorges Reservoir area requires to be regulated. The river channel has the features of mountain-rivers. The flood prevention standard of the river channel is designed to prevent 50-year flood according to the local meteorological and hydrological data. The gravity gabion retaining walls has been used to support side slopes, the Reynolds gabion cushion has been used to protect the bottom, and the reinforced Mack mattresses has been employed to protect slopes. The results indicate that the minimum cross sectional area of the river is 25.743 m2 under the condition of 50-year flood, which is lower than the designed maximum cross sectional area of the river 31 m2, meaning that the design of the river channel meets the flood prevention requirements. In addition, the special material composition and structure features of gabion structures do not only overcome the defects of the traditional structure which features stereoplasm imperviousness and is prone to aging and failures, but also are characterized by good foundation adaptability and ecological features. This project can be referred to similar projects as the new ideas in river regulation of mine mountain areas.
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