Applying reactive transport modelling in a chromium-contaminated site in the Matanza-Riachuelo basin, Buenos Aires, Argentina

Q4 Business, Management and Accounting

International Journal of Environment and Health Pub Date : 2018-04-03 DOI:10.1504/IJENVH.2018.090861

E. Ceballos, S. Bea, Romina Sanci

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引用次数: 7

Abstract

Chromium (Cr) is one of the main pollutants affecting both soil and groundwater systems in some areas within the Matanza-Riachuelo River Basin (MRB) in Argentina. The particular site of study is located near an abandoned tannery and chemical industry facilities. Cr toxicity and mobility depend on its oxidation state: Cr(VI) is an active carcinogen, more soluble and mobile, whereas Cr(III) shows low toxicity and solubility, precipitating in the form of amorphous Cr(OH)3(am). This paper is devoted to elucidate the main key controls on the Cr(VI)-plume transport at this site using reactive transport (RT) modelling and uncertainty quantification analysis tools. RT results suggest a Cr source term on the surface to explain the observed Cr concentrations in both Pampeano and Puelche aquifers. UQ analysis indicates that the Cr(VI) concentrations in both aquifers are sensitive to hydraulic connectivity between them, the reaction reduction rates Cr(VI)-Cr(III) and the organic matter contents.

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在阿根廷布宜诺斯艾利斯Matanza Riachuelo盆地铬污染场地应用反应迁移模型

铬(Cr)是影响阿根廷马坦扎-里亚丘埃洛河流域部分地区土壤和地下水系统的主要污染物之一。研究的特定地点位于一个废弃的制革厂和化学工业设施附近。Cr的毒性和迁移率取决于它的氧化态:Cr(VI)是一种活性致癌物，更容易溶解和迁移，而Cr(III)表现出低毒性和溶解度，以无定形Cr(OH)3(am)的形式沉淀。本文利用反应输运(RT)模型和不确定性量化分析工具，阐明了该站点Cr(VI)-羽流输运的主要关键控制因素。RT结果表明，表面的Cr源项可以解释Pampeano和Puelche含水层中观察到的Cr浓度。UQ分析表明，两个含水层的Cr(VI)浓度对两层之间的水力连通性、Cr(VI)-Cr(III)的反应还原速率和有机质含量都很敏感。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Environment and Health Business, Management and Accounting-Business, Management and Accounting (all)

CiteScore

0.30

自引率

0.00%

发文量

期刊介绍： The IJEnvH is a fully-refereed scientific journal that provides an international forum for the exchange of information and the advancement of knowledge in the multidisciplinary field of Environment and Health. The aim of the IJEnvH is to stimulate the discussion and communication among scientists, researchers and experts with different background and expertise, involved, at different levels, with the study of environment and health problems.