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首页> 外文期刊>Environmental Science & Technology >Common Occurrence of a Positive δ~(53)Cr Shift in Central European Waters Contaminated by Geogenic/Industrial Chromium Relative to Source Values
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Common Occurrence of a Positive δ~(53)Cr Shift in Central European Waters Contaminated by Geogenic/Industrial Chromium Relative to Source Values

机译：相对于源值，在中子/工业铬污染的中欧水域中常见发生δ〜（53）Cr正迁移的现象

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摘要

Carcinogenic effects of hexavalent chromium in waters are of concern in many countries worldwide. We explored Cr isotope systematics at 11 sites in the Czech Republic and Poland. Geogenic Cr pollution was associated with serpentinite bodies at former convergent plate margins, while anthropogenic Cr pollution resulted from electroplating, tanning, and the chemical industry. Cr(Ⅵ) concentration in geogenic waters was less than 40 ppb. Anthropogenic waters contained up to 127,000 ppb Cr(Ⅵ). At both geogenic and anthropogenic sites,where known, the source of pollution had a low δ~(53)Cr (＜1‰).δ~(53)Cr of geogenic and anthropogenic waters was up to 3.9 and 5.8‰, respectively. At both serpentinite-dominated and industrial sites, δ~(53)Cr(Ⅵ)aq was shifted toward higher values, compared to the pollution source. At the industrial sites, this positive δ~(53)Cr shift was related to Cr(Ⅵ) reduction, a process known to fractionate Cr isotopes. At geogenic sites, the origin of high δ~(53)Cr(Ⅵ)aq is tentatively ascribed to preferential release of ~(53)Cr during oxidation of soil Cr(Ⅲ) and its mobilization to water. δ~(53)Cr(Ⅵ) of industrially contaminated waters was significantly higher (p ＜ 0.001) compared to δ~(53)Cr of waters carrying geogenic Cr(Ⅵ),implying that either the effective fractionation factor or process extent was greater for Cr(Ⅵ) reduction than for Cr(Ⅲ) oxidation.
机译：六价铬在水中的致癌作用在全世界许多国家中受到关注。我们在捷克共和国和波兰的11个地点探索了Cr同位素系统。在以前的会聚板块边缘，成因铬污染与蛇纹岩体有关，而电镀，制革和化学工业则是人为造成的铬污染。地质水体中的Cr（Ⅵ）浓度小于40 ppb。人为水含有高达127,000 ppb的Cr（Ⅵ）。在已知的人为和人为的地点，污染源的δ〜（53）Cr都较低（＜1‰）。地源性水和人为水的δ〜（53）Cr分别高达3.9和5.8‰。在蛇纹岩为主的和工业场所，与污染源相比，δ〜（53）Cr（Ⅵ）aq向更高的值移动。在工业现场，这种δ〜（53）Cr的正向位移与Cr（Ⅵ）的还原有关，这是一种已知的将Cr同位素分级的过程。在成矿点，高δ〜（53）Cr（Ⅵ）aq的起源暂时归因于土壤Cr（Ⅲ）的氧化及其在水中的迁移过程中优先释放〜（53）Cr。工业污染水的δ〜（53）Cr（Ⅵ）显着高于地源性Cr（Ⅵ）的水的δ〜（53）Cr，这说明有效分馏系数或工艺范围都更大。 Cr（Ⅵ）还原反应比Cr（Ⅲ）氧化反应快。

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  • 来源
    《Environmental Science & Technology》 |2014年第11期|6089-6096|共8页
  • 作者

    Martin Novak; Vladislav Chrastny; Eva Cadkova; Juraj Farkas; Thomas D. Bullen; Jiri Tylcer; Zdenka Szurmanova; Marcel Cron; Eva Prechova; Jan Curik; Marketa Stepanova; Jan Pasava; Lucie Erbanova; Marie Houskova; Karel Puncochar; Lucas A. Hellerich;

  • 作者单位

    Division of Geochemistry and Laboratories, Czech Geological Survey, Geologicka 6,15200 Prague 5, Czech Republic;

    Division of Geochemistry and Laboratories, Czech Geological Survey, Geologicka 6,15200 Prague 5, Czech Republic;

    Division of Geochemistry and Laboratories, Czech Geological Survey, Geologicka 6,15200 Prague 5, Czech Republic;

    Division of Geochemistry and Laboratories, Czech Geological Survey, Geologicka 6,15200 Prague 5, Czech Republic;

    U.S. Geological Survey, Menlo Park, California 94025, United States;

    AQD-envitest, s r.o., Vitezna 3,70200 Ostrava, Czech Republic;

    AQD-envitest, s r.o., Vitezna 3,70200 Ostrava, Czech Republic;

    AQD-envitest, s r.o., Vitezna 3,70200 Ostrava, Czech Republic;

    Division of Geochemistry and Laboratories, Czech Geological Survey, Geologicka 6,15200 Prague 5, Czech Republic;

    Division of Geochemistry and Laboratories, Czech Geological Survey, Geologicka 6,15200 Prague 5, Czech Republic;

    Division of Geochemistry and Laboratories, Czech Geological Survey, Geologicka 6,15200 Prague 5, Czech Republic;

    Division of Geochemistry and Laboratories, Czech Geological Survey, Geologicka 6,15200 Prague 5, Czech Republic;

    Division of Geochemistry and Laboratories, Czech Geological Survey, Geologicka 6,15200 Prague 5, Czech Republic;

    Division of Geochemistry and Laboratories, Czech Geological Survey, Geologicka 6,15200 Prague 5, Czech Republic;

    Division of Geochemistry and Laboratories, Czech Geological Survey, Geologicka 6,15200 Prague 5, Czech Republic;

    AECOM, Rocky Hill, Connecticut 06067, United States;

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