Qian Hong, Zhang Yuling, Wang Jiali, Si Chaoqun, Chen Zaixing
Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun, 130021, People's Republic of China.
College of Environment and Resources, Jilin University, Changchun, 130021, People's Republic of China.
Environ Monit Assess. 2018 Jan 13;190(2):80. doi: 10.1007/s10661-017-6449-6.
The objective of this study was to investigate a petroleum-contaminated groundwater site in northeast China. We determined the physicochemical properties of groundwater that contained total petroleum hydrocarbons (TPH) with a view to developing a scientifically robust strategy for controlling and remediating pollution of groundwater already contaminated with petroleum. Samples were collected at regular intervals and were analyzed for dissolved oxygen (DO), iron (Fe), sulfate (SO), electrical conductivity (Eh), pH, hydrogen carbonate (HCO), and enzyme activities of catalase (CAT), peroxidase (HRP), catechol 1,2-dioxygenase (C12O), and catechol 2,3-dioxygenase (C23O). We used factor analysis in SPSS to determine the main environmental characteristics of the groundwater samples. The results confirmed that the study site was slightly contaminated and that TPH levels were decreasing slightly. Some of the physicochemical variables showed regular fluctuations; DO, Fe, and SO contents decreased gradually, while the concentrations of one of the microbial degradation products, HCO, increased. Microorganism enzyme activities decreased gradually. The microbiological community deteriorated noticeably during the natural attenuation process, so microbiological degradation of pollutants receded gradually. The HCO content increased and the pH and Eh decreased gradually. The groundwater environment tended to be reducing.
本研究的目的是调查中国东北一个受石油污染的地下水场地。我们测定了含有总石油烃（TPH）的地下水的理化性质，以期制定出一套科学有效的策略，用于控制和修复已受石油污染的地下水。定期采集样本，并分析溶解氧（DO）、铁（Fe）、硫酸盐（SO）、电导率（Eh）、pH值、碳酸氢盐（HCO）以及过氧化氢酶（CAT）、过氧化物酶（HRP）、邻苯二酚1,2-双加氧酶（C12O）和邻苯二酚2,3-双加氧酶（C23O）的酶活性。我们使用SPSS中的因子分析来确定地下水样本的主要环境特征。结果证实，研究场地受到轻度污染，TPH水平略有下降。一些理化变量呈现出规律性波动；溶解氧、铁和硫酸盐含量逐渐降低，而微生物降解产物之一的碳酸氢盐浓度升高。微生物酶活性逐渐降低。在自然衰减过程中，微生物群落明显恶化，因此污染物的微生物降解逐渐减弱。碳酸氢盐含量增加，pH值和电导率逐渐降低。地下水环境趋于还原状态。
