| 某硫矿重金属分级及土柱淋溶 |
| |
| 作者姓名： | C. LIN J. LIN |
| |
| 作者单位： | SchoolofEnviornmentalScienceandManagement,SouthernCrossUniversity,Lismore,NSW（Australia） |
| |
| 基金项目： | *1Project partly supported by an internal grant of Southern Cross University, Australia (Project No.305093). |
| |
| 摘 要： | Fractions of various heavy metals in a sulfidic minespoil were investigated.Column leachine experiment was also conducted to simulate “acid mine drainage“(AMD) from the minespoil.The results show that leaching of heavy metals from the minespoil was extremely significant during the initial water flushing.The amounts of heavy metals leached out dramatically reduced after leaching twice.It is worthwhile to note that in this study,Zn,Mn,Fe,As and Ni in the first leachate exceeded the total amount of each corresponding water-extractable(1:5,soil:water)metal contained in the minespoil sample.This appears to suggest that 1:5 water extraction did not allow accurate estimation of water-leachable concentrations of the above heavy metals.This work has implications for the management of sulfidic minespolis.Acid drainage of great environmental concerns is likely to occur only during heavy rainfall events after substantial soluble and readily exchangeable acid and metals are accumulated in the minespoils.The slow-reacting fractions other than water-soulble and readily exchangeable fractions may pose little environmental hazards.This is particularly true for Pb,As and Ni.
|
| 关 键 词： | 重金属 金属硫化物 浸出 酸性矿山废水 铅 砷 镍 毒性 |
Heavy metals in a sulfldic minespoil: Fractions and column leaching |
| |
| C. LIN,J. LIN.Heavy metals in a sulfldic minespoil: Fractions and column leaching[J].Pedosphere,2003,13(1):75-80. |
| |
| Authors: | C LIN and J LIN |
| |
| Institution: | School of Environmental Science and Management, Southern Cross University, Lismore, NSW (Australia);School of Environmental Science and Management, Southern Cross University, Lismore, NSW (Australia) |
| |
| Abstract: | Fractions of various heavy metals in a sulfidic minespoil were investigated. Column leaching experimentwas also conducted to simulate "acid mine drainage" (AMD) from the minespoil. The results show thatleaching of heavy metals from the minespoil was extremely significant during the initial water flushing.The amounts of heavy metals leached out dramatically reduced after leaching twice. It is worthwhile tonote that in this study, Zn, Mn, Fe, As and Ni in the first leachate exceeded the total amount of eachcorresponding water-extractable (1:5, soil:water) metal contained in the minespoil sample. This appears tosuggest that 1:5 water extraction did not allow accurate estimation of water-leachable concentrations of theabove heavy metals. This work has implications for the management of sulfidic minespoils. Acid drainageof great environmental concerns is likely to occur only during heavy rainfall events after substantial solubleand readily exchangeable acid and metals are accumulated in the minespoils. The slow-reacting fractionsother than water-soluble and readily exchangeable fractions may pose little environmental hazards. This isparticularly true for Pb, As and Ni. |
| |
| Keywords: | acid mine drainage heavy metal leaching metal sulfides minespoil |
| 本文献已被 维普 万方数据 等数据库收录！ |
| 点击此处可从《土壤圈》浏览原始摘要信息 |
| 点击此处可从《土壤圈》下载免费的PDF全文 |
|
