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首页> 外文期刊>Water, Air, and Soil Pollution >BIOREMEDIATION OF PETROLEUM CONTAMINATED BEACH SEDIMENTS: USE OF CRUDE PALM OIL AND FATTY ACIDS TO ENHANCE INDIGENOUS BIODEGRADATION
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BIOREMEDIATION OF PETROLEUM CONTAMINATED BEACH SEDIMENTS: USE OF CRUDE PALM OIL AND FATTY ACIDS TO ENHANCE INDIGENOUS BIODEGRADATION

机译：石油污染的海滩沉积物的生物修复：使用棕榈油和脂肪酸来增强土著生物降解

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Amendment of simple organic carbon, in the presence of inorganic nutrients, to oil contaminated beach sediments can potentially stimulate the biodegradation of hydrocarbons by the indigenous microbial biomass. The ability of crude palm oil (CPO) and fatty acids, in the presence of soluble inorganic nutrients (C:N:P = 100:10:1), to stimulate biodegradation in sediments amended with Arabian light crude oil was investigated in laboratory microcosms over a 30-day period. The presence of nutrients alone enhanced the most probable number (MPN) of hydrocarbon degrading bacteria by almost 12 times after 30 days, and by 26 times in sediment also amended with CPO, thereby confirming its ability to stimulate the biomass. Addition of individual fatty acids to nutrients-amended sediments resulted in MPN enhancements of up to 170 times, where straight alkanes (i.e., C_(17) and C_(18)) were completely degraded. Amendment with CPO, myristic, oleic, linoleic and palmitic acids (0.5% dry weight equivalent) also enhanced the metabolic activity of the entire microbial biomass, as measured by intracellular dehydrogenase activity, reaching a maximum of 30 μg INTF g dry sed~(-1) h~(-1). Loss of branched alkanes was significantly enhanced, where loss of pristane was complete and phytane loss reached 98% in sediment treated with myristic acid. This study highlights the considerable benefit of adding readily oxidizable fatty acids for enhancing in situ bioremediation of hydrocarbons in nutrient-amended beach sediments.
机译：在存在无机养分的情况下，将简单的有机碳修正为受石油污染的海滩沉积物可能会刺激原生微生物生物量对碳氢化合物的生物降解。在实验室微观世界中，研究了在可溶性无机营养素（C：N：P = 100：10：1）存在下，粗棕榈油（CPO）和脂肪酸刺激阿拉伯沉积物修正的沉积物中生物降解的能力。在30天的时间内。 30天后，仅养分的存在就将最有可能降解烃类细菌的数量增加了近12倍，而在沉积物中也添加了CPO，从而增加了26倍，从而证实了其刺激生物量的能力。在营养物改良的沉积物中添加单独的脂肪酸可使MPN增强多达170倍，其中直链烷烃（即C_（17）和C_（18））被完全降解。用细胞内脱氢酶活性测定，用CPO，肉豆蔻酸，油酸，亚油酸和棕榈酸（0.5％干重当量）进行的改良也增强了整个微生物生物量的代谢活性，最大达到30μgINTF g干sed〜（- 1）h〜（-1）。在肉豆蔻酸处理的沉积物中，支链烷烃的损失显着增加，其中rist烷的损失完全，植烷损失达到98％。这项研究强调了添加易于氧化的脂肪酸对增强营养物改良的海滩沉积物中碳氢化合物的原位生物修复的巨大益处。

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