Based on the characteristics of the ecological environmental remediation of mining area, the application of biotechnology was proposed to do the remediation of the polluted environment in the mining area, mainly inclu...Based on the characteristics of the ecological environmental remediation of mining area, the application of biotechnology was proposed to do the remediation of the polluted environment in the mining area, mainly including the treatment of gangue dump and tailing heap, improvement of reclamation soil as well as the re- mediation of contaminated soil. Finally, the application and deveiopment trend of biotechnology in environmental remediation and soil remediation of mining area were pointed out.展开更多
In order to determine the environmental quality condition of reclaimed soils inHuainan mining area, soil samples were collected from three representative mines, suchas Panyi Mine, Xinzhuangzi Mine and Datong Mine.The ...In order to determine the environmental quality condition of reclaimed soils inHuainan mining area, soil samples were collected from three representative mines, suchas Panyi Mine, Xinzhuangzi Mine and Datong Mine.The total concentration of Cd, Hg, Cu,Pb and As in the samples were analyzed.The potential ecological risk was used to evaluatethe heavy metals pollution.The investigation reveals that the reclaimed soils are contaminatedto a certain degree and the trace elements in coal gangue transferred to thesurface soil.The order of potential ecological risk is Cd>Hg>Cu>Pb>As; the pollution degreeof each sampling site is arranged in the following order: Xinzhuangzi Mine>DatongMine>Panyi Mine, and the multiform of heavy metals of potential ecological risk index is at357.35～484.62.展开更多
The objective of this study was to investigate the ef- fects of earthworm density on the availability of nutrients and heavy metals in metal contaminated soils.Pb/Zn mine tailings were mixed throughly with a red yello...The objective of this study was to investigate the ef- fects of earthworm density on the availability of nutrients and heavy metals in metal contaminated soils.Pb/Zn mine tailings were mixed throughly with a red yellow podzolic soil at the ratio (w/w) of 75:25.Earthworms (Pheretima sp.) were introduced to the mixture at four different densities,zero,three,six and nine individuals per pot planted with ryegrass (Loliun multiflorum). The results indicated that earthworm activity significantly en- hanced ryegrass shoot biomass.However,as denser earthworm population was introduced,shoot biomass tended to decrease. Earthworm activity significantly increased soil pH and availability of N,P and K in the tailings and soil mixture.There was a general tendency that uptake of Zn by ryegrass increased after earthworm inoculation,although the increase in extractable Zn in tailings and soil mixture was not significant.On the contrary,there seemed to be a lower uptake of Pb by ryegrass under earthworm inoclation, despite the fact that higher extractable Pb concentrations were observed.The present project indicated that the improved growth of ryegrass was due to improved nutrient availability and other soil conditions,by inoculation of earthworms at an appropriate rate.Further studies are needed to illustrate the relationship be- tween metal availability and earthworm activity in the field.展开更多
Grid method is employed for sampling covering soil at the test field,whic h is reclamation area filled by coal mining wastes for cropland in th e Fushun coal mine,Liaoning Province,the Northeast China.The soil samp le...Grid method is employed for sampling covering soil at the test field,whic h is reclamation area filled by coal mining wastes for cropland in th e Fushun coal mine,Liaoning Province,the Northeast China.The soil samp les are taken at different locations,inclu ding three kinds of covering soil,th ree different depths of soil layers a nd four different covering ages of covering soil.The s patial-temporal variation of heavy metal element content in reclamatio n soil is stud-ied.The results indicate that the co ntent of heavy metal elements is decreasing year after year;the determin ant reason why the content of heavy metal elemen ts at 60cm depth layer is higher than t hat at 30cm depth layer and surface is fertiliz-er and manure application;the metal elements mainly come from external environment;there is no metal pollut ion coming from mother material(coal mining wastes)in plough layer of covering soil.展开更多
基金Supported by the Key Science and Technology Project for Agriculture of Guangxi(201528)the Planning Project for Scientific Research and Technological Development of Guangxi(Guike415104001-22)+1 种基金the Planning Project for Scientific Research and Technological Development of Nanning City(20152054-13)the Major Project of the National Natural Science Foundation of China(U1033004-06)
文摘Based on the characteristics of the ecological environmental remediation of mining area, the application of biotechnology was proposed to do the remediation of the polluted environment in the mining area, mainly including the treatment of gangue dump and tailing heap, improvement of reclamation soil as well as the re- mediation of contaminated soil. Finally, the application and deveiopment trend of biotechnology in environmental remediation and soil remediation of mining area were pointed out.
基金Supported by the Natural Science Foundation of China of Anhui Education to Research(KJ2009A088)
文摘In order to determine the environmental quality condition of reclaimed soils inHuainan mining area, soil samples were collected from three representative mines, suchas Panyi Mine, Xinzhuangzi Mine and Datong Mine.The total concentration of Cd, Hg, Cu,Pb and As in the samples were analyzed.The potential ecological risk was used to evaluatethe heavy metals pollution.The investigation reveals that the reclaimed soils are contaminatedto a certain degree and the trace elements in coal gangue transferred to thesurface soil.The order of potential ecological risk is Cd>Hg>Cu>Pb>As; the pollution degreeof each sampling site is arranged in the following order: Xinzhuangzi Mine>DatongMine>Panyi Mine, and the multiform of heavy metals of potential ecological risk index is at357.35～484.62.
文摘The objective of this study was to investigate the ef- fects of earthworm density on the availability of nutrients and heavy metals in metal contaminated soils.Pb/Zn mine tailings were mixed throughly with a red yellow podzolic soil at the ratio (w/w) of 75:25.Earthworms (Pheretima sp.) were introduced to the mixture at four different densities,zero,three,six and nine individuals per pot planted with ryegrass (Loliun multiflorum). The results indicated that earthworm activity significantly en- hanced ryegrass shoot biomass.However,as denser earthworm population was introduced,shoot biomass tended to decrease. Earthworm activity significantly increased soil pH and availability of N,P and K in the tailings and soil mixture.There was a general tendency that uptake of Zn by ryegrass increased after earthworm inoculation,although the increase in extractable Zn in tailings and soil mixture was not significant.On the contrary,there seemed to be a lower uptake of Pb by ryegrass under earthworm inoclation, despite the fact that higher extractable Pb concentrations were observed.The present project indicated that the improved growth of ryegrass was due to improved nutrient availability and other soil conditions,by inoculation of earthworms at an appropriate rate.Further studies are needed to illustrate the relationship be- tween metal availability and earthworm activity in the field.
文摘Grid method is employed for sampling covering soil at the test field,whic h is reclamation area filled by coal mining wastes for cropland in th e Fushun coal mine,Liaoning Province,the Northeast China.The soil samp les are taken at different locations,inclu ding three kinds of covering soil,th ree different depths of soil layers a nd four different covering ages of covering soil.The s patial-temporal variation of heavy metal element content in reclamatio n soil is stud-ied.The results indicate that the co ntent of heavy metal elements is decreasing year after year;the determin ant reason why the content of heavy metal elemen ts at 60cm depth layer is higher than t hat at 30cm depth layer and surface is fertiliz-er and manure application;the metal elements mainly come from external environment;there is no metal pollut ion coming from mother material(coal mining wastes)in plough layer of covering soil.
