The effect of chemical dispersant concentration on hydrocarbon mobility through permeable North-East Scotland sands

The effect of chemical dispersant concentration on hydrocarbon mobility through permeable North-East Scotland sands
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化学分散剂浓度对苏格兰东北部可渗透砂中碳氢化合物流动性的影响

DOI:
10.1016/j.ecss.2018.09.008
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发表时间:
2018
期刊:
Estuarine, Coastal and Shelf Science
影响因子:
--
通讯作者:
Perez Calderon L
Perez Calderon L
中科院分区:
--
文献类型:
--
作者:
Perez Calderon L

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石油意外排放到海洋环境中可能到达敏感的海岸线,造成广泛的环境影响。化学分散剂是一种应对工具,用于通过在浮油到达海岸之前促进其分散来尽量减少对沿海生态系统的损害。然而,化学分散剂可能会增加石油泄漏后碳氢化合物夹带到沿海沉积物中的情况,导致碳氢化合物在沉积物中的停留时间延长。在这里,分散剂浓度对夹带能力的碳氢化合物在可渗透的沿海砂从苏格兰东北部(英国)的影响进行了评估。分散剂应用浓度低于推荐剂量时,有利于烃类夹带到砂中。超过10厘米深的水溶性烃的渗滤不受化学分散剂的应用和水不溶性烃的浓度随分散剂浓度的增加。结果强调,分散剂的应用很容易动员较少的水溶性烃通过沿海砂,但不影响孔隙水运输更多的水溶性烃。
Accidental releases of oil to the marine environment can reach sensitive shorelines resulting in a wide range of environmental impacts. Chemical dispersant is a response tool employed to minimise damage to coastal ecosystems by facilitating dispersal of oil slicks before they reach shores. However, chemical dispersants may increase entrainment of hydrocarbons into coastal sediments following an oil spill, resulting in higher hydrocarbon residence times in sediments. Here, the effect of dispersant concentration on the entrainment capability of hydrocarbons in permeable coastal sands from North East Scotland (United Kingdom) was evaluated. Hydrocarbon entrainment into sands was facilitated by dispersant application at concentrations below manufacturer-recommended dosage. Percolation of water-soluble hydrocarbons beyond 10 cm deep was not affected by chemical dispersant application and water-insoluble hydrocarbon concentrations increased with dispersant concentration. Results highlighted that the application of dispersant readily mobilised less water-soluble hydrocarbons through coastal sands but did not affect pore-water transport of more water-soluble hydrocarbons.
影响因子: 1.2
作者:
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