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首页> 外文期刊>Geosciences >Groundwater Natural Contamination by Toluene in Beja and Faro Districts, Portugal
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Groundwater Natural Contamination by Toluene in Beja and Faro Districts, Portugal

机译：葡萄牙贝雅和法鲁地区的甲苯对地下水的自然污染

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The focus area is located along Beja and Faro districts (southwestern of Portugal), where the Baixo Alentejo Flysch Group exists, is composed of the Mértola, Mira, and Brejeira Formations. The aim of this article is to characterize the groundwater contamination by toluene, one of the petroleum products that may originate from natural petroleum systems and have been introduced into the environment by natural seepage. For this study, twenty soil samples and thirty-one water samples were collected, in 2016, from artesian wells, boreholes, and springs, and analyzed in a GC-FID system. Sampling was performed using headspace vials, with distilled water and a bactericide to inhibit any bacterial activities. The results showed that 93.5% of water samples range between 1000 and 6000 μg/L, and 55% are higher than 3000 μg/L of toluene concentration. In soil samples, amounts of toluene are less than 1000 μg/L in general. These levels are much higher than the World Health Organization health-based guideline for drinkable water (700 μg/L) and higher than those usually found in other places, being only comparable with values from severe industrial contamination. Contaminated groundwater represents a serious concern for human health, and residents should be informed to avoid drinking contaminated ground water or using it for other domestic proposes.
机译：重点地区位于贝雅（Baja）和法鲁（Faro）地区（葡萄牙西南部），拜索·阿连特茹·费利希（Baixo Alentejo Flysch）集团所在的地区由梅尔托拉，米拉和布雷耶拉组组成。本文的目的是表征甲苯对地下水的污染，甲苯是一种可能来自天然石油系统的石油产品，已通过自然渗透引入环境。在这项研究中，2016年从自流井，井眼和泉水中收集了20个土壤样品和31个水样品，并在GC-FID系统中进行了分析。使用顶空小瓶，蒸馏水和杀菌剂进行采样以抑制任何细菌活动。结果表明，水样的93.5％介于1000和6000μg/ L之间，而55％的甲苯浓度高于3000μg/ L。在土壤样品中，甲苯的含量通常小于1000μg/ L。这些水平远高于世界卫生组织基于饮用水的健康指南（700μg/ L），也高于其他地方通常的水平，仅与严重的工业污染值相当。受污染的地下水代表着人类健康的严重问题，应告知居民避免饮用受污染的地下水或将其用于其他家庭建议。

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