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首页> 外文期刊>Journal of Soil Science and Environmental Management >Assessment of the ecological state of soil above an underground natural gas storage using bioassay
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Assessment of the ecological state of soil above an underground natural gas storage using bioassay

机译：利用生物测定法评估地下天然气储存库上方土壤的生态状况

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Soils in areas of underground natural gas storage facilities (UGS) can become contaminated with hydrocarbons, which impacts negatively on soil properties and functions of soil biocenosis. The purpose of this study was to biodiagnose soil samples from the territory of an UGS (Stepnoye district, Saratov region) using bioassay. For microbiological analysis of the soil samples, the following parameters were selected: The total number of heterotrophic microorganisms, the content of hydrocarbon-oxidizing and methylotrophic bacteria, as well as the number of iron-oxidizing bacteria given that in the area of this natural gas storage facility clusters of bacteriomorphic magnetite may have been formed. Dehydrogenase, catalase and β-fructofuranosidase activities were studied as informative and sensitive indicators. The biodiagnostic results showed reduced levels of heterotrophic microorganisms in the soil samples from the area of this UGS compared to the background samples obtained outside the UGS. A high content of indicator organisms: Hydrocarbon-oxidizing and methylotrophic bacteria, not only facultative, but obligate was observed in some soil samples which suggests the emission of methane into the upper layers of the soil. The presence of iron-oxidizing microorganisms in the soil samples was confirmed by an increased activity of dehydrogenases and catalases. The observed correlations between the studied biological and physico-chemical parameters of soil confirmed the presence of hydrocarbon pollution.
机译：地下天然气存储设施（UGS）区域的土壤可能会被碳氢化合物污染，这会对土壤性质和土壤生物群落功能产生负面影响。这项研究的目的是使用生物测定法对UGS区域（萨拉托夫州Stepnoye区）的土壤样品进行生物诊断。为了对土壤样品进行微生物分析，选择了以下参数：异养微生物总数，烃氧化和甲基营养细菌的含量以及铁氧化细菌的数量（考虑到该天然气的面积）可能已经形成了类细菌磁铁矿的储存设施群。研究了脱氢酶，过氧化氢酶和β-果糖呋喃糖苷酶的活性，作为信息和敏感指标。生物诊断结果表明，与在UGS外部获得的背景样品相比，该UGS区域的土壤样品中异养微生物水平降低。指示生物含量很高：在某些土壤样品中观察到碳氢氧化细菌和甲基营养细菌，不仅是兼性细菌，而且专性细菌，这表明甲烷向土壤上层排放。脱氢酶和过氧化氢酶活性的增加证实了土壤样品中铁氧化微生物的存在。在研究的土壤生物学和理化参数之间观察到的相关性证实了碳氢化合物污染的存在。

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