Potential for Enhancement of Biodegradation of Crude Oil in Louisiana Salt Marshes using Nutrient Amendments
Potential for Enhancement of Biodegradation of Crude Oil in Louisiana Salt Marshes using Nutrient Amendments
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使用营养改良剂增强路易斯安那州盐沼原油生物降解的潜力
DOI：
10.1023/a:1005025809014
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
J. Pardue
中科院分区：
文献类型：
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作者：
W. Jackson;J. Pardue
路易斯安那州的盐沼生态系统面临石油污染事件的高风险，而由于盐沼的物理敏感性，这些系统的修复主要限于内在生物修复。这项研究在微观和岩心研究中调查了原油降解的内在速率和营养增强速率。此外，还确定了限制元素、负荷率和最佳氮形态（NH4+ 或NO3-）。盐沼烷烃成分 (C11-C44) 的固有降解率相对较低 (0–3.9% day-1)，但多环芳烃 (PAH) 组分（萘、C1 和 C2-萘以及菲、C1 和 C2-菲）的降解率较高 (8–16% day-1)。添加氮在统计上增强了许多烷烃和总多环芳烃的降解，而天然存在的磷被发现就足够了。研究发现，如果以 NH4+ 的形式施用 100-500 N mg kg-1 范围内的土壤，产生 100-670 N mg L-1 孔隙水，则氮是最有效的。核心研究表明，当对盐沼的完整部分施肥时，也会观察到类似的趋势。
Salt marsh ecosystems in Louisiana are at high risk of an oil contamination event while remediation of these systems is mainly limited to intrinsic bioremediation due to the physical sensitivity of salt marshes. This study investigated both the intrinsic and nutrient enhanced rates of crude oil degradation both in microcosm and core studies. In addition, limiting elements, loading rates and optimum nitrogen forms (NH4+ or NO3-) were determined. Salt marshes have relatively low intrinsic degradation rates (0–3.9% day-1) of the alkane component (C11-C44) but high rates (8–16% day-1) of degradation of the polycyclic aromatic hydrocarbon (PAH) fraction (naphthalene, C1, and C2-Naphthalene and Phenanthrene, C1, and C2-Phenanthrene). Additions of nitrogen statistically enhanced degradation of many alkanes and total PAHs while naturally present phosphorous was found to be sufficient. Nitrogen was found to be most effective if applied as NH4+ in the range of 100-500-N mg kg-1 of soil producing a pore water range of 100-670-N mg L-1. Core studies indicate that similar trends are observed when applying fertilizers to intact portions of salt marsh.