An Investigation of the Ability of a 14C-Labeled Hydrocarbon Mineralization Test to Predict Bioremediation of Soils Contaminated with Petroleum Hydrocarbons
An Investigation of the Ability of a 14C-Labeled Hydrocarbon Mineralization Test to Predict Bioremediation of Soils Contaminated with Petroleum Hydrocarbons
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DOI：
10.1080/10889860902902057
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发表时间：
2009-01-01
影响因子：
2
通讯作者：
Zeeb, Barbara
中科院分区：
文献类型：
--
作者：
Sanscartier, David;Reimer, Ken;Zeeb, Barbara
生物修复技术是一种被广泛接受的碳氢化合物污染土壤修复技术。通常进行可处理性研究，以评估污染物的生物降解潜力，并设计最佳的处理方法。经常使用测量土壤呼吸的实验室研究。一种方法包括监测添加到污染土壤中的14 C标记的烃替代物的矿化。本研究探讨了这种方法的能力，以正确地预测去除碳氢化合物污染物最初发现在土壤中。矿化的14 C-标记的十六烷监测在7个土壤污染的各种烃混合物，新鲜和风化，在微观实验。减少总石油烃（TPH）的浓度同时测量在单独的微观世界。这两种类型的微观世界都受到同样的修正制度的约束。对于所有的土壤，相关性较差的矿化和TPH减少数据集之间观察。矿化数据只支持一种土壤中的污染物去除数据。研究结果表明，放射性替代方法不能可靠地预测的程度，修正案的影响，去除最初存在于土壤中的碳氢化合物，因此可以预测次优的治疗方案。土壤可处理性协议的建议。
Bioremediation is a widely accepted technology for the remediation of hydrocarbon-contaminated soil. Treatability studies are usually carried out to assess the biodegradation potential of the contaminants and to design optimal treatments. Laboratory studies measuring soil respiration are often used. One method consists of monitoring the mineralization of a 14C-labeled hydrocarbon surrogate added to the contaminated soil. This study investigates the ability of this method to properly predict the removal of the hydrocarbon contaminants initially found in soils. Mineralization of 14C-labeled hexadecane was monitored in seven soils contaminated with various hydrocarbon mixtures, both fresh and weathered, in microcosm experiments. Reduction of total petroleum hydrocarbon (TPH) concentrations was measured simultaneously in separate microcosms. Both types of microcosms were subjected to the same amendment regimes. For all soils, poor correlation was observed between the mineralization and TPH reduction data sets. Mineralization data supported contaminants removal data in only one soil. Findings indicate that the radioactive surrogate method does not reliably predict the extent of, and the effect of amendments on, the removal of the hydrocarbons initially present in soil, and may therefore predict suboptimal treatment regimes. Recommendations for soil treatability protocols are provided.