铜陵铜尾矿凤丹种植基地重金属污染初探

摘要/Abstract

摘要： 通过对安徽铜陵凤凰山铜尾矿凤丹种植基地土壤和凤丹中重金属污染状况进行采样分析.结果表明,在尾矿空白地和凤丹种植地土壤中Cu、Cd、Pb、Zn元素含量、存在形态差异明显,说明凤丹对尾矿土壤的修复效果明显;尾矿土壤中的Cu、Cd元素总量分别是国家土壤环境质量二级标准的436～1443倍和3.67～3.86倍,凤丹种植地重金属元素的CPI指数达到5.607,表明尾矿土壤中重金属元素污染仍相当严重.研究发现,4种元素在凤丹各部位含量明显不同:叶和根心为Cu>Zn>Pb>Cd,茎和根皮为Zn>Cu>Pb>Cd,根皮中Zn含量最高;土壤中重金属元素各形态的变化与凤丹体内相应元素总量无显著相关;丹皮内Cu、Cd、Pb元素含量与丹龄之间相关系数分别为0.842、0.993、0.992,Cu、Cd元素在凤丹体内含量约是出口药用植物绿色行业限量指标的1.43～2.53倍和1.17～3.17倍,可见缩短栽种时间可有效减少重金属元素对丹皮药效的影响.

关键词: 凤丹, 重金属, 铜尾矿

Abstract: The study on the soil and Paeonia ostii Cu,Cd,Pb and Zn at the copper-tailings reservoir of Tongling City,Anhui Province showed that the forms and contents of test heavy metals were differed in Paeonia ostii-planted and control soils.The Cu and Cd contents in control soil were 4.36～14.43 and 3.67～3.86 times of the 2nd national standard for soil environmental quality,respectively,and the composite pollution index of the heavy metals in Paeonia ostii-planted soil was up to 5.607.The heavy metals content in Paeonia ostii leaf and root-stem was in order of Cu>Zn>Pb>Cd,and that in Paeonia ostii stem and root- peel was Zn>Cu>Pb>Cd.The comparison of the heavy metals contents in Paeonia ostii with the criterion about herbal medicine showed that the Cu content in Paeonia ostii was1. 43～2.53 times of the criterion,and the Cd content was1. 17～3.17 times of the criterion.

Key words: Paeonia ostii, Heavy metal, Copper-tailings

中图分类号:

X173

沈章军, 王友保, 王广林, 严密, 李征, 刘登义. 铜陵铜尾矿凤丹种植基地重金属污染初探[J]. 应用生态学报, 2005, 16(4): 673-677.

SHEN Zhangjun, WANG Youbao, WANG Guanglin, YAN Mi, LI Zheng, LIU Dengyi . Heavy metals pollution of Paeonia ostii land at copper-tailings reservoir of Tongling city:A preliminary study[J]. Chinese Journal of Applied Ecology, 2005, 16(4): 673-677.

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