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Jinfei Feng Yinxi Wang Jian Zhao Liqun Zhu Xinmin Bian Weijian Zhang 《环境科学学报(英文版)》2011,23(7):1158-1164
Air and soil pollution from traffic has been considered as a critical issue to crop production and food safety, however, few efforts have
been paid on distinguish the source origin of traffic-related contaminants in rice plant along highway. Therefore, we investigated metals
(Pb, Cd, Cr, Zn and Cu) concentrations and stable Pb isotope ratios in rice plants exposed and unexposed to highway traffic pollution
in Eastern China in 2008. Significant differences in metals concentrations between the exposed and unexposed plants existed in leaf for
Pb, Cd and Zn, in stem only for Zn, and in grain for Pb and Cd. About 46% of Pb and 41% of Cd in the grain were attributed to the
foliar uptake from atmosphere, and there were no obvious contribution of atmosphere to the accumulations of Cr, Zn and Cu in grain.
Except for Zn, all of the heavy metals in stem were attributed to the root uptake from soil, although significant accumulations of Pb and
Cd from atmosphere existed in leaf. This indicated that different processes existed in the subsequent translocation of foliar-absorbed
heavy metals between rice organs. The distinct separation of stable Pb isotope ratios among rice grain, leaf, stem, soil and vehicle
exhaust further provided evidences on the different pathways of heavy metal accumulation in rice plant. These results suggested that
further more attentions should be paid to the atmospheric deposition of heavy metals from traffic emission when plan crop layout for
food safety along highway. 相似文献
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公路沿线弃渣场的失稳破坏,不仅容易造成其下方道路和河流的堵塞,而且严重威胁人民的生命和财产安全.快速、准确和批量地评价公路沿线弃渣场危险性就显得十分必要.通过对公路沿线弃渣场进行遥感图像识别、无人机拍摄、现场调查及试验,确定了6个弃渣场危险性影响因子,运用物质点法对实体弃渣场进行了多因素多水平的数值模拟,得出各因子对弃... 相似文献
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福建南平高速交警为进一步推进高速公路沿线学校交通安全管控工作,进一步整合高速公路交通安全宣传资源,扩大高速公路交通安全教育履盖面,11月30日下午,在延平区大黄中学启动“校园交通安全宣传员推进活动暨聘书颁发”仪式。仪式上,由9名中学生组成的高速公路安全管理宣传员宣誓履职。当地党委政府、高速交警、学校及学生代表分别发言,并就加强警校协作、落实宣传工作责任、务求宣传工作实效等提出具体措施和要求。 相似文献
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选取滇中高原面上具有典型代表意义的3条公路,就其沿线的植被覆盖状况展开实地调查,对其主要植被类型进行分析,归纳得出滇中高原公路沿线植被基本特性,并对该地区有关公路沿线生态恢复建设提出浅显的认识与刍议,为促使云南高原山地公路沿线植被能尽可能地发挥其生态和社会经济功能提供思路。 相似文献
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