研究硫酸铝渣和硫铁矿烧渣制聚硅酸硫酸铁的工艺流程及其主要参数。提取硫酸铝渣中的 Si O2 得到 Na2 Si O3溶液 ,提取硫铁矿烧渣中铁得到 Fe SO4 结晶。用 Fe SO4 结晶制备聚合硫酸铁。用含3 .5 % Si O2 的 Na2 Si O3溶液 ,控制 p H=4....研究硫酸铝渣和硫铁矿烧渣制聚硅酸硫酸铁的工艺流程及其主要参数。提取硫酸铝渣中的 Si O2 得到 Na2 Si O3溶液 ,提取硫铁矿烧渣中铁得到 Fe SO4 结晶。用 Fe SO4 结晶制备聚合硫酸铁。用含3 .5 % Si O2 的 Na2 Si O3溶液 ,控制 p H=4.0 ,制得聚硅酸 ,将聚合硫酸铁加入聚硅酸制得聚硅酸硫酸铁絮凝剂。红外光谱分析表明 ,聚硅酸硫酸铁结合了 SO2 - 4。检测了聚硅酸硫酸铁对模拟浊水和垃圾填埋场渗滤液的絮凝效果 ,用铁和硅物质的量比为 0 .5、用量 0 .5 m L/L 的聚硅酸硫酸铁 ,处理模拟浊水 ,除浊率可达 90 %以上。用铁和硅物质的量比为 1.5、用量 4.0 m L/L的聚硅酸硫酸铁处理垃圾填埋场渗滤液生化处理尾水 ,CODCr去除率可达 60 %。展开更多
Nowadays,a certain amount of landfills in China were constructed without horizontal liner system.The research conducted focuses mainly on the contaminants from landfill leachate migrating in the aquifer of a fractured...Nowadays,a certain amount of landfills in China were constructed without horizontal liner system.The research conducted focuses mainly on the contaminants from landfill leachate migrating in the aquifer of a fractured granite area,and pollution predictions for groundwater were made by establishing numerical model with Visual Modflow combining field investigation like geological surveys,drilling,geophysical explorations,hydrogeological experiments,water quality analysis.The transportation of the chloride ion from landfill in the aquifer was simulated in the model with time frames of 2 555,3 650,5 475 and7 300 d.The model shows that from 2 555 d to 7 300 d starting from 2003,the chloride ion migrated from 900 m to 1 300 m,respectively,along the groundwater flow.The results indicate that as leachate plume migrated in the aquifer,the concentration of the pollutants can be up to 19.74 to 251.76 times that of background value.The research proves that the leachate poses a threat to the local water body and offers a reference towards groundwater pollution prevention for fractured granite landfill sites.展开更多
基金Project(12JJ305)supported by the Education Department of Hunan Province,China
文摘Nowadays,a certain amount of landfills in China were constructed without horizontal liner system.The research conducted focuses mainly on the contaminants from landfill leachate migrating in the aquifer of a fractured granite area,and pollution predictions for groundwater were made by establishing numerical model with Visual Modflow combining field investigation like geological surveys,drilling,geophysical explorations,hydrogeological experiments,water quality analysis.The transportation of the chloride ion from landfill in the aquifer was simulated in the model with time frames of 2 555,3 650,5 475 and7 300 d.The model shows that from 2 555 d to 7 300 d starting from 2003,the chloride ion migrated from 900 m to 1 300 m,respectively,along the groundwater flow.The results indicate that as leachate plume migrated in the aquifer,the concentration of the pollutants can be up to 19.74 to 251.76 times that of background value.The research proves that the leachate poses a threat to the local water body and offers a reference towards groundwater pollution prevention for fractured granite landfill sites.
