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首页> 美国卫生研究院文献>The Scientific World Journal >Monitoring of the Gasoline Oxygenate MTBE and BTEX Compounds in Groundwater in Catalonia (Northeast Spain)
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Monitoring of the Gasoline Oxygenate MTBE and BTEX Compounds in Groundwater in Catalonia (Northeast Spain)

机译：在加泰罗尼亚（西班牙东北部）监测地下水中的汽油含氧量MTBE和BTEX化合物

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Headspace (HS) gas chromatography with flame ionisation detection (HS-GC-FID) and purge and trap (P) gas chromatography-mass spectrometry (P) were used for the determination of methyl-tert-butyl ether (MTBE) and benzene, toluene, and xylenes (BTEX) in groundwater. In this work, we present the first data on the levels of MTBE and BTEX in different groundwater wells in the area of Catalonia (northeast Spain). This monitoring campaign corresponded to 28 groundwater wells that were located near petrol service stations, oil refinery storage tanks, and/or chemical industry at different locations of Catalonia during the period of 1998/1999. The levels of MTBE detected varied between 4—300 μg/l, but two sites had MTBE levels up to 3 and 13 mg/l. In many cases, the BTEX levels were below 1 μg/l, whereas 7 sites had levels varying from 19 μg/l up to 3 mg/l. Most of them were related to leakage from underground tanks in petrol service stations, while the remaining three corresponded respectively to chemical industrial pollution of undetermined origin and to a leak from high-ground petrol tanks in petrochemical refinery factories. The aquifers involved were constituted by detritus coarse materials, sands, and conglomerates. Piezometric levels were roughly comprised between 3 and 40 m, and permeability (K) and transmissivity (T) values were estimated from field measurements.The MTBE/BTEX ratio was also calculated and reached values up to 250. These values were expected, since if we consider that spilled oxygenated gasoline is the source of well contamination and based on solubility considerations alone, the MTBE source concentrations would be about 200 times higher than any BTEX compounds.
机译：顶空（HS）气相色谱和火焰电离检测（HS-GC-FID）和吹扫捕集（P）气相色谱-质谱（P）用于测定甲基叔丁基醚（MTBE）和苯地下水中的甲苯和二甲苯（BTEX）。在这项工作中，我们提供了加泰罗尼亚地区（西班牙东北部）不同地下水井中MTBE和BTEX含量的第一批数据。这项监测活动对应于1998/1999年期间加泰罗尼亚不同地点的加油站，炼油厂储油罐和/或化学工业附近的28口地下水井。检测到的MTBE水平在4-300μg/ l之间变化，但是两个站点的MTBE水平最高为3和13 mg / l。在许多情况下，BTEX含量低于1μg/ l，而7个部位的含量从19μg/ l到3 mg / l不等。其中大多数与加油站地下油罐的泄漏有关，其余三个分别与来源不明的化学工业污染和石化炼油厂的高地面汽油罐的泄漏有关。所涉及的含水层是由碎屑粗料，沙子和砾岩组成的。测压水平大致介于3至40 m之间，并且通过现场测量估算了渗透率（K）和透射率（T）值。还计算了MTBE / BTEX比值，最高达到250。这些值是可以预期的，因为如果我们认为泄漏的含氧汽油是井污染的源头，仅根据溶解度考虑，MTBE源的浓度将比任何BTEX化合物高约200倍。

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