مورد إلكتروني
Emulsified polycolloid substrate biobarrier for benzene and petroleum-hydrocarbon plume containment and migration control – A field-scale study
| العنوان: | Emulsified polycolloid substrate biobarrier for benzene and petroleum-hydrocarbon plume containment and migration control – A field-scale study |
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| المؤلفون: | Lee, T.H., Cao, W.Z., Tsang, Daniel C. W., Sheu, Y.T., Shia, K.F., Kao, C.M. |
| بيانات النشر: | Elsevier B.V. 2019 |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | The objective of this field-scale study was to assess the effectiveness of applying an emulsified polycolloid substrate (EPS; containing cane molasses, soybean oil, and surfactants) biobarrier in the control and remediation of a petroleum-hydrocarbon plume in natural waters. An abandoned petrochemical manufacturing facility site was contaminated by benzene and other petroleum products due to a leakage from a storage tank. Because benzene is a petroleum hydrocarbon with a high migration ability, it was used as the target compound in the field-scale study. Batch partition and sorption experiment results indicated that the EPS to water partition coefficient for benzene was 232 mg/mg at 25 °C. This suggests that benzene had a higher sorption affinity to EPS, which decreased the benzene concentrations in groundwater. The EPS solution was pressure-injected into three remediation wells (RWs; 150 L EPS in 800 L groundwater). Groundwater samples were collected from an upgradient background well, two downgradient monitor wells (MWs), and the three RWs for analyses. EPS injection increased total organic carbon (TOC) concentrations (up to 786 mg/L) in groundwater, which also resulted in the formation of anaerobic conditions. An abrupt drop in benzene concentration (from 6.9 to below 0.04 mg/L) was observed after EPS supplementation in the RWs due to both sorption and biodegradation mechanisms. Results show that the EPS supplement increased total viable bacteria and enhanced bioremediation efficiency, which accounted for the observed decrease in benzene concentration. The first-order decay rate in RW1 increased from 0.003 to 0.023 d −1 after EPS application. Injection of EPS resulted in significant growth of indigenous bacteria, and 23 petroleum-hydrocarbon-degrading bacterial species were detected, which enhanced the in situ benzene biodegradation efficiency. Results demonstrate that the EPS biobarrier can effectively contain a petroleum-hydrocarbon plume and prevent its migrat |
| مصطلحات الفهرس: | Biobarrier, Emulsified polycolloid substrate (EPS), Green remediation, In situ bioremediation, Partition, Petroleum hydrocarbon, Article |
| URL: | |
| الإتاحة: | Open access content. Open access content |
| ملاحظة: | English |
| أرقام أخرى: | HNK oai:repository.hkust.edu.hk:1783.1-129555 Science of the Total Environment, v. 666, May 2019, p. 839-848 0048-9697 1879-1026 1405234634 |
| المصدر المساهم: | HONG KONG UNIV OF SCI & TECH, THE From OAIster®, provided by the OCLC Cooperative. |
| رقم الأكسشن: | edsoai.on1405234634 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |