摘要
经过9 15010 650 mm的模拟酸雨淋溶以后,与对照相比,pH4.5的酸雨使红壤Cr累积释放量增加4.02%-88.54%,Co增加-2.35%56.14%,Ni增加5.82%79.53%,Cu增加-3.45%82.23%,Cd增加4.87%83.14%,Pb增加10.64%99.19%;pH3.5的酸雨使Cr累积释放量增加6.72%308.42%,Co增加14.17%134.81%,Ni增加10.06%140.32%,Cu增加-3.11%258.89%,Cd增加8.44%630.84%,Pb增加17.02%483.15%。几种重金属元素释放对酸雨的敏感性依次是:Pb和Cd释放对酸雨较敏感,其次为Cr和Cu,而Ni和Co的释放对酸雨较不敏感。红壤中Cr,Co,Ni,Cu,Cd,Pb累积释放量差别较大,但不同土壤之间其分布表现出基本一致的特点,释放量大小依次是:Pb>Co>Ni>Cu>Cr>Cd。红壤中Cr,Co,Ni,Cu,Cd,Pb的累积释放量(Q)随淋溶量(H)的变化符合二次模型。
After simulating rainfall of 9 150-10 650 mm, compared with the control, pH4.5 acid rain enhanced cumulative release amount of Cr 4.02%-88.54%, Co -2.35%-56.14%,Ni 5.82%-79.53%,Cu -3.45% -82.23%,Cd 4.87%-83.14%,Pb 10.64%-99.19%. pH 3.5 acid rain enhanced cumulative release amount of Cr 6.72-308.42%,Co 14.17%-134.81%,Ni 10.06%-140.32%,Cu -3.11% -258. 89%,Cd 8. 44% -630.84% ,Pb 17.02%- 483.15%. The sensitivity of the heavy metal elements release to acid rain was Pb, Cd -Cr. Cu-Ni, Co. There was a similar characteristic of cumulative release of the six heavy metal elements, their release amount in turn was Pb-Co-Ni-Cu-Cr-Cd. The relation between cumulative release amount of the six heavy metal elements can been described with Q= A ＋ B1 ＋ B2H^2 .
出处
《水土保持学报》
CSCD
北大核心
2005年第5期89-93,共5页
Journal of Soil and Water Conservation
基金
国家自然科学基金资助项目(49973031)
湖南省自然科学基金资助项目(05JJ30017)
湖南科技大学博士基金资助项目(E50475)
关键词
模拟酸雨
红壤
重金属
释放
simulated acid rain
red soil
heavy metals
release
