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首页> 外文期刊>Archives of Environmental Contamination and Toxicology >First Investigation of Seasonal Concentration Behaviors and Sources Assessment of Aliphatic Hydrocarbon in Waters and Sediments from Wadi El Bey, Tunisia
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First Investigation of Seasonal Concentration Behaviors and Sources Assessment of Aliphatic Hydrocarbon in Waters and Sediments from Wadi El Bey, Tunisia

机译：首先调查季风和突尼斯Wadi El Bey中水中脂肪烃的季节浓度行为和源评估

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摘要

The contents, composition profiles, and sources of aliphatic hydrocarbons were examined in surface sediment and water samples collected from Wadi El Bey, in Tunisia, during different year seasons in 14 stations receiving domestic effluent, industrial discharge, and agricultural drainage wastes. The target substances were analyzed by gas chromatography coupled with mass spectrometric detection (GC/MS). Total concentrations of n-alkanes (n-C-14-n-C-38) ranged from 0.08 +/- 0.01 to 18.14 +/- 0.1 mu g/L in waters and 0.22 +/- 0.04 to 31.9 +/- 24.6 mu g/g in sediments, while total aliphatic fraction ranged from 0.08 +/- 0.01 to 196 +/- 140 mu g/L in waters and 0.22 +/- 0.04 to 1977 +/- 1219 mu g/g in sediments, which means that almost all sites were affected by hydrocarbon contents in sediments exceeding the recommended limit (100 mu g/g). Various diagnostic indices (ADIs) were used to identify the hydrocarbon sources, namely the concentration ratios of individual compounds (n-C-17/pristane, n-C-18/phytane, pristane/phytane, n-C-29/n-C-17, n-C-31/n-C-19) as well as cumulative quantities (Carbon Preference Index, natural n-alkanes ratio, terrigenous/aquatic compounds ratio, unresolved complex mixture percentage, low molecular weight vs. high molecular weight homologues, Alkane Proxy and Terrestrial Marine Discriminants). In general, these indexes indicated that the origin of aliphatic hydrocarbons affecting sediments and waters of Wadi El Bey were linked to both biogenic and petrogenic inputs, attesting the impact of plankton and terrestrial plants and of oil contamination, respectively. The average carbon chain length computation (ACL), used to further index the chemical environment, ranged from 25.5 to 31.1 in sediments and 47.9-116 in waters. This finding could depend on the severe disturbances suffered by the ecosystem as a consequence of heavy anthropogenic inputs. Petroleum contamination associated with high eutrophication rates in Wadi El Bey must be strictly controlled, due to possible harmful effects induced on ecosystem and humans.
机译：在接受国内污水，工业排放量和农业排水废物的14个站的不同年份季节，在从Wadi El Bey收集的地表沉积物和水样中检查了脂肪族烃的含量，组合物和脂肪烃来源。通过与质谱检测（GC / MS）偶联的气相色谱分析靶物质。水的总浓度为0.08 +/- 0.01至18.14 +/-0.1μg/ l，0.22 +/- 0.04至31.9 +/-24.6μg/ g在沉积物中，虽然总脂肪族分数在水中的0.08 +/- 0.01至196 +/- 0.01至196 +/- 0.04至1977 +/- 1219 mu g / g中，这意味着几乎所有位点受沉积物中的碳氢化合物含量影响超过推荐极限（100μg/ g）。各种诊断指数（ADIS）用于鉴定烃源，即各种化合物的浓度比（NC-17 /丙氨酸，NC-18 /植物，普通甲烷/植物，NC-29 / NC-17，NC-31 / NC-19）以及累积量（碳偏好指数，天然N-烷烃比，累积/水生比率，未解析的复杂混合物百分比，低分子量与高分子量同源物，烷烃代理和陆地海洋判别率）。通常，这些指标表明，影响禾本科BET沉积物和水域的脂肪烃的起源与生物和纤维原血管意口有关，分别证明了浮游生物和陆地植物的影响和植物污染。用于进一步指标化学环境的平均碳链长度计算（ACL）范围为沉积物中的25.5至31.1和水中的47.9-116。这一发现可能取决于生态系统所遭受的严重紊乱，由于繁重的人为投入。由于生态系统和人类所诱导的可能有害影响，必须严格控制与Wadi El Bey的高富营养化率相关的石油污染。

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