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首页> 外文期刊>Journal of Hazardous Materials >Road-deposited sediments in an urban environment: A first look at sequentially extracted element loads in grain size fractions
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Road-deposited sediments in an urban environment: A first look at sequentially extracted element loads in grain size fractions

机译：城市环境中道路沉积物的沉积物：以粒度级数顺序提取元素负荷的初步观察

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摘要

Sediments stored in urban drainage basins are important environmental archives for assessing contamination. Few studies have examined the geochemical fractionation of metals in individual grain size classes of solid environmental media. This is the first study of road sediments to quantify the mass loading of Al, Cu, Pb, and Zn in individual grain size classes (＜63 μm to 1000-2000 μm) and partition contributions amongst four sequentially extracted fractions (acid extractable, reducible, oxidizable, and residual). The optimized BCR sequential extraction procedure was applied to road sediments from Palolo Valley, Oahu, Hawaii. Road sediments from this non-industrialized drainage basin exhibited significant enrichment in Cu, Pb, and Zn. Metal mass loading results indicate that the ＜63 μm grain size class dominated almost all fraction loads for a given element. The residual fraction dominated the Al loading for this geogenic element. The reducible fraction, associated with Fe and Mn oxides, was the most important component for Cu, Pb, and Zn loading. These results have direct implications for environmental planners charged with reducing sediment-associated contaminant transport in urbanized drainage basins.
机译：储存在城市流域的沉积物是评估污染的重要环境档案。很少有研究检查固体环境介质中单个粒度级别的金属的地球化学分馏。这是第一个研究道路沉积物的方法，用于量化各个晶粒度级别（＜63μm至1000-2000μm）中的Al，Cu，Pb和Zn的质量负荷，并在四个依次提取的馏分（酸可提取，可还原）中分配贡献，可氧化和残留）。优化的BCR顺序提取程序应用于夏威夷瓦胡岛帕洛洛谷地的道路沉积物。来自这个非工业化流域的道路沉积物表现出明显的铜，铅和锌富集。金属质量载荷结果表明，对于给定元素，＜63μm的晶粒尺寸类别几乎占所有分数载荷。剩余部分占该成矿元素铝含量的主导。与Fe和Mn氧化物相关的可还原部分是Cu，Pb和Zn负载的最重要成分。这些结果对负责减少城市化流域中与沉积物相关的污染物迁移的环境规划人员具有直接影响。

著录项

  • 来源
    《Journal of Hazardous Materials》 |2012年第30期|p.54-62|共9页
  • 作者

    Ross A. Sutherland; Filip M.G. Tack; Alan D. Ziegler;

  • 作者单位

    University of Hawaii at Manoa, Geomorphology Laboratory, Department of Geography, 2424 Maile Way, Honolulu, HI 96822, USA;

    Chent University, Laboratory of Analytical Chemistry and Applied Ecochemistry, Coupure Links-653, B-9000 Gent, Belgium;

    National University of Singapore, Geography Department, AS2, #03-01, 1 Arts Link, Kent Ridge, Singapore 117570, Singapore;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    metal loading; hawaii; grain-size; sequential extraction;

    机译：金属负载;夏威夷晶粒大小;顺序提取;

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