| 张刚,王俊霞,徐峰,张龙,王雅珏,张卫,林匡飞.利用针叶指示电子废物拆解区重金属的污染[J].农业环境科学学报,2015,34(8):1486-1492. |
| 利用针叶指示电子废物拆解区重金属的污染 |
| Coniferous Leaves as an Indicator of Heavy Metal Pollution in E-waste Dismantling Area |
| 投稿时间：2015-04-06 |
| DOI：10.11654/jaes.2015.08.008 |
| 中文关键词: 针叶 电子废弃物 重金属 富集因子 |
| 英文关键词: coniferous leaves electronic waste heavy metals enrichment factors |
| 基金项目:环保部公益性项目(201309047,201309030) |
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| 摘要点击次数: 3150 |
| 全文下载次数: 85 |
| 中文摘要: |
| 为了给评价典型区域重金属污染提供有效的生物监测方法,利用ICP-MS检测了典型电子废物拆解区及其对照区6种常见木本植物叶中13种重金属元素的含量,比较了不同种类的木本植物叶对金属元素的累积能力,并探讨了叶片中重金属的可能来源。结果表明,Hg、Mn等重金属含量在0.025~393 mg·kg-1之间,电子废物拆解区和对照区植物叶中Hg、Sn、Sb、Co、Cr、As、V、Se和Pb等金属的含量表现出显著的区域性差异(P< 0.05)。从主成分分析结果可推测出Mn、Cu、Co、Ni、Pb、As、Sb、V和Hg的来源较为一致,可能来源于拆解导致的土壤或大气污染。"富集因子"计算结果表明,侧柏和柳杉对Hg、Cd、Se、Sn、Sb、Pb和Cu等有较好的指示作用。 |
| 英文摘要: |
| E-waste dismantling has caused severe pollution of heavy metals in surrounding soils. Here we collected leaf samples of six tree species from eight rural sites, including one industrialized site in Taizhou and two control sites in eastern China to explore the use of tree leaves to indicate heavy metal pollution in soil. Concentrations of 13 heavy metal elements in the leaf samples were determined by ICP-MS, and the bioaccumulation of each element in the leaves were evaluated. The concentrations of Hg and Mn in the leaves ranged from 0.025 to 393 mg·kg-1, indicating distinctive species-specific differences in metal content of the leaves. Hg, Sn, Sb, and Pb showed higher concentrations in Sabina chinensis, while higher Cd, Cr and Co were found in Cedrus deodara. However, Se, As and Sn tended to be enriched in Cryptomeria fortunei. There was a significant spatial variation of metal concentrations in the leaves. Hg, Sn, Sb, Co, Cr, As, V, Se and Pb concentrations in leaves from e-waste recycling areas were higher than those from the control sites, indicating that e-waste dismantling activities had caused heavy metal pollution in the local vegetation systems. The principal component analysis showed that plant Mn, Cu, Co, Ni, Pb, As, Sb, V and Hg were mainly from the soil or atmosphere contamination induced by e-waste recycling activities. In conclusion, this study shows that coniferous leaves could be used as a bio-indicator of heavy metal pollution and for the assessment of exposure risk to the local residents. |
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