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- W2366701464 abstract "Good understanding of leaching and release characteristics of heavy metals in coal gangue is significant for evaluation and prevention of environmental pollution of coal gangue. A large coal spoil pile( GD06) located in Lilan coal mine of Heshan city was selected to do static immersion and dynamic leaching experiments of coal gangue,to reveal leaching and release characteristics of eight heavy metals( As,Cd,Cr, Cu,Mn,Ni,Pb,Zn) under different pH value,temperature and interaction way with water. The leaching concentrations of these heavy metals except for undetected Mn in the static immersion experiment increase with time. Release of heavy metals under normal temperature is characterized as quick release at the early period and as slow release at the later period,whereas release rate of some heavy metals such as Cr,Cu,Pb increase at the later period of immersion under higher temperature. Release of these eight heavy metals is characterized as intermittent quick release with higher leaching concentration than that in the static immersion. pH values and temperature are important factors affecting leaching concentration of heavy metals under the static immersion. The leaching concentrations of heavy metals increase with increasing temperature,while different heavy metals show different leaching pattern under different pH values. Zn,Ni,Cd and As of coal gangue are the easiest polluting soil and groundwater of heavy metals with higher releasing concentration and rate in both static immersion and dynamic leaching experiments." @default.
- W2366701464 created "2016-06-24" @default.
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- W2366701464 date "2014-01-01" @default.
- W2366701464 modified "2023-09-24" @default.
- W2366701464 title "Leaching experiment and environmental effect of heavy metals of coal gangue in Heshan mining area,Guangxi province" @default.
- W2366701464 hasPublicationYear "2014" @default.
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