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| 长江南京段近岸沉积物和土壤中重金属分布特征分析 |
| D istribution and Enrichmentof Heavy M etalin Sedimentsand Soilsin Nanjing Section ofthe Yangtze River |
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| DOI： |
| 中文关键词: 重金属 近岸沉积物 土壤 富集 颗粒物粒级 长江 |
| 英文关键词: Heavy metal Near-shore sediment Soil Enrichment Particle grain size Yangtze River |
| 基金项目:江苏省国土生态地球化学调查项目 (EG004) |
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| 中文摘要: |
| 通过测定沉积物和土壤中Cd 、Pb 、Cr 、Zn 、Cu 、Ni6 种重金属元素的平均含量, 计算其富集因子, 分析长江南京段近岸沉积物和土壤中重金属的空间分布特征, 结果表明, 几种重金属在沉积物中的富集次序为 :Cd > Pb > Cr>1 >Ni> Cu> Zn, 在土壤中为 :Cd > Zn >Cu >1 >Cr> Pb >Ni, 除 Zn 和 Cu 外, 其他几种金属在沉积物中的富集程度高于土壤, 同时 Cd 的含量超过土壤环境质量三级标准。以 Cd 和 Pb 为例分析了重金属含量与沉积物粒级 |
| 英文摘要: |
| Thesedimentsand soilsofYangtze Riverwereanalyzed forthecontentsand enrichmentfactorsof six heavymetalsCd, Pb, Cr, Zn, Cu andNiin orderto know theirdistribution characters. ThesequenceofEFs was Cd > Pb >Cr>1 >Ni>Cu > Zn in the sediments, however, Cd > Zn > Cu >1 > Cr> Pb >Niin the soils. Theenrichmentofothermetalsinthesedimentswashigherthan soilsexceptZn and Cu. Theconcentration ofCd had exceeded thethirdlevelofsoilenvironmentalquality standards. Taking Cd and Pb asan example analyzed therelationship between contentofheavymetaland grain size. Regression analysisindicated a significantcorre lation. Heavy metalsand fineparticlesshowed acloserelationship. Sothe heavymetalscarried by fineparticu late matterwereimportantsourceofthem in sedimentsby sortingof Yangtze River. |
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