【摘 要】
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The study targeted the arable soils in Lianhuashan tungsten mine area in Guangdong Province and investigated metals pollution and regulation of metals in the arable soils.The arable soils in Lianhuash
【机 构】
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Chemistry college,Hanshan Normal University State
【出 处】
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The 17th International Conference on Heavy Metals in the Env
论文部分内容阅读
The study targeted the arable soils in Lianhuashan tungsten mine area in Guangdong Province and investigated metals pollution and regulation of metals in the arable soils.The arable soils in Lianhuashan tungsten mine area were analyzed for Zn,Cu,Mn,Ni,Pb,Cd and As.Soda lime,MnO2,Fe2O3 and calcium magnesium phosphate were applied to amend the metals-polluted arable soils in which was planted by radish.Effects of substrate amendments on metals fraction and migration in plant-soil system were also investigated.The results showed that the arable soils were polluted by Zn,Mn,Pb,Cd and As,especially Cd and As,which were 10.2~16.7 and 1.1~1.3 times more than background values,respectively.Soda lime decreased soluble Zn,Cu,Mn,Ni,Pb and Cd contents,and their accumulations in the radish.Fraction of Zn,Cu,Mn,Pb and Cd in the arable soils and their accumulations in the radish were hardly affected by Fe2O3,MnO2 and calcium magnesium phosphate.Zn,Cu,Cd,Cu,Pb and Ni accumulations in radish were significantly and positively correlated with their soluble contents,but were not significantly correlated with the total heavy metal contents.Applications of soda lime,MnO2 or Fe2O3 significantly decreased the concentrations of loosely sorbed arsenic and arsenic accumulation in radish.Calcium magnesium phosphate had little effect on arsenic fraction,but decreased arsenic accumulation in radish.In addition,application of soda lime with MnO2,Fe2O3 or calcium magnesium,respectively,reduced arsenic accumulation in radish more effectively than a single one.Arsenic accumulation in radish had significant positive correlation with loosely sorbed arsenic content and significant negative correlation with Ca-As content.Addition of soda lime with Fe2O3 or calcium magnesium,respectively,is effective amendments to decrease metals and arsenic accumulation in radish in the arable soils around Lianhuashan tungsten mine area.
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