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Sources and Variability of Petroleum Hydrocarbon Residues in Sediments of Chilika Lagoon, East Coast of India

机译：印度东海岸Chilika Lagoon沉积物中石油烃残留物的来源和变异

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摘要

The spatio-temporal distribution and the controlling factors of petroleum hydrocarbons (PHCs) in sediments of Chilika lagoon was investigated. Samples were collected during three seasons and quantified using UV-fluorescence spectroscopy. Concentrations of PHCs in surface sediments varies from 0.18 to 12.13 ppm (mean 3.71 ± 3.94 ppm). Compared to the lagoon, the monitoring stations adjacent to jetties with high boating activities tend to have higher PHC concentrations, suggesting that the contribution is likely to be from fossil fuel combustion and accidental seepage. The sediment organic matter (OM) of Chilika ranges from 0.26% to 6.23%. PHC maintains a positive correlation with OM (p < 0.05; f = 0.334), indicating the long term deposition of PHC as sediment OM. However, there is no significant relation between PHC and sediment texture, indicating its negligible control over PHC. The recorded PHC concentrations are below the threshold limit (70 ppm) as classified by United States (US) National Academy of Sciences (NAS) and also lower than those reported from similar ecosystems in India and overseas. Since the long term deposition and the bioaccumulation of PHC cannot be avoided, it is essential to monitor these parameters periodically.
机译：研究了Chilika泻湖沉积物中石油烃（PHCs）的时空分布及其控制因素。在三个季节中收集样品，并使用紫外荧光光谱法进行定量。表层沉积物中PHCs的浓度在0.18至12.13 ppm之间变化（平均值为3.71±3.94 ppm）。与泻湖相比，划船活动频繁的码头附近的监测站趋向于具有较高的PHC浓度，这表明其作用可能来自化石燃料燃烧和意外渗漏。 Chilika的沉积物有机质（OM）为0.26％至6.23％。 PHC与OM保持正相关（p <0.05，f = 0.334），表明PHC作为沉积物OM的长期沉积。但是，PHC与沉积物质地之间没有显着关系，表明其对PHC的控制可忽略不计。记录的PHC浓度低于美国国家科学院（NAS）分类的阈限值（70 ppm），也低于印度和海外类似生态系统的报告浓度。由于无法避免PHC的长期沉积和生物积累，因此必须定期监视这些参数。

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