COMPARATIVE ASSESSMENT OF LABORATORY AND FIELD-BASED METHODS TO MONITOR NATURAL ATTENUATION PROCESSES IN THE CONTAMINATED GROUNDWATER OF A FORMER COKING PLANT SITE

2014 ◽  
Vol 13 (3) ◽  
pp. 583-596 ◽  
Author(s):  
Bernd Mahro ◽  
Anne Berghoff ◽  
Anja Berning ◽  
Christoph Wortmann ◽  
Achim Moller
Keyword(s):  
Natural Attenuation ◽  
Comparative Assessment ◽  
Contaminated Groundwater ◽  
Plant Site ◽  
Coking Plant

Comparing Deterministic and Probabilistic Risk Assessment at a Coking Plant Site in China

2012 ◽  
Vol 610-613 ◽  
pp. 798-803 ◽  
Author(s):  
Xiao Yang Jia ◽  
Tian Xiang Xia ◽  
Mao Sheng Zhong ◽  
Jing Liang
Keyword(s):  
Risk Assessment ◽  
Hazard Quotient ◽  
Ingestion Rate ◽  
Probabilistic Risk Assessment ◽  
Risk Sensitivity ◽  
Soil Ingestion ◽  
Soil C ◽  
Plant Site ◽  
Coking Plant ◽  
Probabilistic Risk

Application of probabilistic risk assessment (PRA) and deterministic risk assessment (DRA) at a coking plant site were compared. By DRA, Hazard Quotient (HQ) following exposure to Naphthalene (Nap) and Incremental Life Cancer Risk (ILCR) following exposure to Benzo(a)pyrene (Bap) are 1.87 and 2.12×10-4. PRA reveals valuable information regarding the possible distribution of risk, and the outputs show that Nap HQ ranges from 6.18×10-7to 6.62 and Bap ILCR ranges from 8.67×10-10to 6.89×10-4. Risk estimates of DRA locates at the 99.59th and 99.76th percentiles in the risk outputs of PRA, indicating the DRA overestimates the risk. Sensitivity analysis was done by calculating a contribution to variance for each exposure parameter and it is found that contaminant concentration in the soil (Cs), exposure duration (ED), soil ingestion rate (IRs) are the most important parameters for risk calculations

Pulsed gas injection: A minimum effort approach for enhanced natural attenuation of chlorobenzene in contaminated groundwater

2009 ◽  
Vol 157 (7) ◽  
pp. 2011-2018 ◽  
Author(s):  
Gerd Ulrich Balcke ◽  
Heidrun Paschke ◽  
Carsten Vogt ◽  
Mario Schirmer
Keyword(s):  
Natural Attenuation ◽  
Gas Injection ◽  
Contaminated Groundwater

Cyanides in a soil of a former coking plant site

1998 ◽  
Vol 161 (3) ◽  
pp. 229-234 ◽  
Author(s):  
Tim Mansfeldt ◽  
Sandra B. Gehrt ◽  
Josef Friedl
Keyword(s):  
Plant Site ◽  
Coking Plant

Robustness of an aerobic metabolically vinyl chloride degrading bacterial enrichment culture

2011 ◽  
Vol 64 (9) ◽  
pp. 1796-1803 ◽  
Author(s):  
He-Ping Zhao ◽  
Kathrin R. Schmidt ◽  
Svenja Lohner ◽  
Andreas Tiehm
Keyword(s):  
Vinyl Chloride ◽  
Natural Attenuation ◽  
Enrichment Culture ◽  
Contaminated Sites ◽  
Contaminated Groundwater ◽  
Chlorinated Ethene ◽  
Equimolar Concentration ◽  
Bacterial Enrichment ◽  
Ph Tolerance

Degradation of the lower chlorinated ethenes is crucial to the application of natural attenuation or in situ bioremediation on chlorinated ethene contaminated sites. Recently, within mixtures of several chloroethenes as they can occur in contaminated groundwater inhibiting effects on aerobic chloroethene degradation have been shown. The current study demonstrated that metabolic vinyl chloride (VC) degradation by an enrichment culture originating from groundwater was not affected by an equimolar concentration (50 μM) of cis-1,2-dichloroethene (cDCE). Only cDCE concentrations at a ratio of 2.4:1 (initial cDCE to VC concentration) caused minor inhibition of VC degradation. Furthermore, the degradation of VC was not affected by the presence of trans-1,2-dichloroethene (tDCE), 1,1-dichloroethene (1,1-DCE), trichloroethene (TCE), and tetrachloroethene (PCE) in equimolar concentrations (50 μM). Only cDCE and tDCE were cometabolically degraded in small amounts. The VC-degrading culture demonstrated a broad pH tolerance from 5 to 9 with an optimum between 6 and 7. Results also showed that the culture could degrade VC concentrations up to 1,800 μM (110 mg/L).

Research on Natural Attenuation of BTEX and Changes of Redox Environment in the Process

2011 ◽  
Vol 183-185 ◽  
pp. 715-719
Author(s):  
Yan Su ◽  
Yong Sheng Zhao ◽  
Rui Zhou ◽  
Xiao Wang ◽  
Sheng He
Keyword(s):  
Natural Attenuation ◽  
Redox Reactions ◽  
Electron Acceptors ◽  
Redox Condition ◽  
Redox Conditions ◽  
Contaminated Groundwater ◽  
Oxidation Condition ◽  
Micro Organisms ◽  
Reducing Condition ◽  
Over Time

Natural attenuation of BTEX and characteristics of the water in the study are researched in this paper. The study not only obtain the attenuation rules of BTEX over time, but also the rules of the redox materials of the contaminated groundwater over time. From the study, we reach conclusion that the redox conditions is changed with the increasing pollution of BTEX and the oxidation condition changes into reducing condition. With the changing of the redox condition, there take place a variety of redox reactions. The materials of oxidation, such as O2, NO3-, Fe3+and SO42-, are transformed into reduction materials, such as NO2-, Fe2+, S2- and so on. In this process, the components of BTEX are degradated by micro-organisms which using the oxidation materials as electron acceptors.

Pilot-scale electro-bioremediation of heavily PAH-contaminated soil from an abandoned coking plant site

Chemosphere ◽  
2020 ◽  
Vol 244 ◽  
pp. 125467 ◽  
Author(s):  
Fengmei Li ◽  
Shuhai Guo ◽  
Bo Wu ◽  
Sa Wang
Keyword(s):  
Contaminated Soil ◽  
Pilot Scale ◽  
Plant Site ◽  
Coking Plant
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