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Chemical and bioanalytical assessment of coal seam gas associated water

Janet Y. M. Tang A G , Mauricio Taulis B , Jacinta Edebeli A , Frederic D. L. Leusch C , Paul Jagals D , Gregory P. Jackson E and Beate I. Escher A F
+ Author Affiliations
- Author Affiliations

A The University of Queensland, National Research Centre for Environmental Toxicology (Entox), Coopers Plains, Qld 4108, Australia.

B Queensland University of Technology, School of Earth, Environmental, and Biological Sciences, Brisbane, Qld 4001, Australia.

C Griffith University, Smart Water Research Centre, Southport, Qld 4222, Australia.

D The University of Queensland, School of Population Health, Herston, Qld 4006, Australia.

E Department of Health, Health Protection Unit, Herston, Qld 4029, Australia.

F Helmholtz Centre for Environmental Research – UFZ, D-04318 Leipzig, Germany.

G Corresponding author. Email: y.tang@uq.edu.au

Environmental Chemistry 12(3) 267-285 https://doi.org/10.1071/EN14054
Submitted: 13 March 2014  Accepted: 27 June 2014   Published: 8 December 2014

Environmental context. Water associated with coal seam gas is generally of poor quality and thus its management and potential further usage is a subject of concern. In a comprehensive study involving chemical and bioanalytical assessments of coal seam gas associated water, we found that less than 5 % of the biological effects could be explained by chemical analysis. The use of bioanalytical tools to complement chemical analysis is recommended for monitoring the quality of water associated with coal seam gas.

Abstract. A comprehensive study was undertaken involving chemical (inorganic and organic) and bioanalytical assessments of coal seam gas associated water (CSGW) in Queensland, Australia. CSGW is a by-product of the gas extraction process and is generally considered as water of poor quality. CSGW is disposed of by release to surface water, reinjected to groundwater or beneficially reused. In this study, groundwater samples were collected from private wells tapping into the Walloon Coal Measures, the same coal aquifer exploited for coal seam gas production in the Surat Basin. The inorganic characteristics of these water samples were almost identical to the CSGW from the nearby gas field, with high sodium, bicarbonate and chloride concentrations but low calcium, magnesium and negligible sulfate concentrations. As for organic compounds, low levels of polyaromatic hydrocarbons (PAHs) were detected in the water samples, and neither phenols nor volatile organic compounds were found. Five of the fourteen bioassays tested gave positive responses (arylhydrocarbon-receptor gene activation, estrogenic endocrine activity, oxidative stress response, interference with cytokine production and non-specific toxicity), whereas the other nine assays showed no genotoxicity, protein damage or activation of hormone receptors other than the estrogen receptor. The observed effects were benchmarked against known water sources and were similar to secondary treated wastewater effluent, stormwater and surface water. As mixture toxicity modelling demonstrated, the detected PAHs explained less than 5 % of the observed biological effects. These results showed that bioanalytical assessment can open new avenues for research into the potential environmental and health risk from CSGW.


References

[1]  I. Hamawand, T. Yusaf, S. G. Hamawand, Coal seam gas and associated water: a review paper. Renew. Sustain. Energy Rev. 2013, 22, 550.
Coal seam gas and associated water: a review paper.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3sXmslajsLo%3D&md5=5f478c7d369d0a2c360b33345e0b4815CAS |

[2]  L. D. Nghiem, T. Ren, N. Aziz, I. Porter, G. Regmi, Treatment of coal seam gas produced water for beneficial use in Australia: a review of best practices. Desal. Water Treat. 2011, 32, 316.
Treatment of coal seam gas produced water for beneficial use in Australia: a review of best practices.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC38XjtlWhsLk%3D&md5=cb9fae892159ed6f7f81e45d40155c19CAS |

[3]  W. A. Van Voast, Geochemical signature of formation waters associated with coalbed methane. AAPG Bull. 2003, 87, 667.
Geochemical signature of formation waters associated with coalbed methane.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD3sXjt12jt7Y%3D&md5=81b4171cb540ba8055955d7a3d7fafecCAS |

[4]  G. E. Batley, R. S. Kookana, Environmental issues associated with coal seam gas recovery: managing the fracking boom. Environ. Chem. 2012, 9, 425.
Environmental issues associated with coal seam gas recovery: managing the fracking boom.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC38XhslSmtrrM&md5=6f2973df28dac00b094a23a17428dea2CAS |

[5]  All-Consulting. Modern Shale Gas Development in the United States: A Primer 2009 (GWPC Energy and National Energy Technology Laboratory Department of Energy and National Energy Technology Laboratory).

[6]  E. C. P. Kinnon, S. D. Golding, C. J. Boreham, K. A. Baublys, J. S. Esterle, Stable isotope and water quality analysis of coal bed methane production waters and gases from the Bowen Basin, Australia. Int. J. Coal Geol. 2010, 82, 219.
Stable isotope and water quality analysis of coal bed methane production waters and gases from the Bowen Basin, Australia.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3cXmtVGjurs%3D&md5=fe68678a00ac237b6a027f8f97217dacCAS |

[7]  M. Taulis, M. Milke, Chemical variability of groundwater samples collected from a coal seam gas exploration well, Maramarua, New Zealand. Water Res. 2013, 47, 1021.
Chemical variability of groundwater samples collected from a coal seam gas exploration well, Maramarua, New Zealand.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC38XhslCnt73F&md5=a95a463352150ed6ca62f444cc7b1feeCAS | 23199455PubMed |

[8]  W. H. Orem, G. L. Feder, R. B. Finkelman, A possible link between Balkan endemic nephropathy and the leaching of toxic organic compounds from Pliocene lignite by groundwater: preliminary investigation. Int. J. Coal Geol. 1999, 40, 237.
A possible link between Balkan endemic nephropathy and the leaching of toxic organic compounds from Pliocene lignite by groundwater: preliminary investigation.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK1MXjsFKlsr8%3D&md5=7d75176aec0e134d52c28c8990b77acaCAS |

[9]  W. H. Orem, C. A. Tatu, H. E. Lerch, C. A. Rice, T. T. Bartos, A. L. Bates, S. Tewalt, M. D. Corum, Organic compounds in produced waters from coalbed natural gas wells in the Powder River Basin, Wyoming, USA. Appl. Geochem. 2007, 22, 2240.
Organic compounds in produced waters from coalbed natural gas wells in the Powder River Basin, Wyoming, USA.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD2sXhtFeitbrL&md5=be4758192019001c1ae27c7450285fe8CAS |

[10]  W. Orem, C. Tatu, M. Varonka, H. Lerch, A. Bates, M. Engle, L. Crosby, J. McIntosh, Organic substances in produced and formation water from unconventional natural gas extraction in coal and shale. Int. J. Coal Geol. 2014, 126, 20.
Organic substances in produced and formation water from unconventional natural gas extraction in coal and shale.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC2cXisFert7s%3D&md5=43b9ea9191189d43a9b5f654709f7246CAS |

[11]  B. Escher, F. Leusch, Bioanalytical Tools in Water Quality Assessment 2012 (IWA Publishing, London, UK).

[12]  B. I. Escher, M. Allinson, R. Altenburger, P. A. Bain, P. Balaguer, W. Busch, J. Cargo, N. Denslow, E. Dopp, K. Hilscherova, A. Humpage, A. Kumar, M. Grimaldi, S. Jayasinghe, B. Jarosova, A. Jia, S. Makarov, K. Maruya, A. Medvedev, A. Mehinto, J. Mendez, A. Poulsen, E. Prochazka, J. Richard, A. Schifferli, D. Schlenk, S. Scholz, F. Shiraishi, S. Snyder, G. Su, J. Y. M. Tang, B. van der Burg, S. van der Linden, I. Werner, S. Westerheide, C. K. C. Wong, M. Yang, B. H. Y. Yeung, X. Zhang, F. D. L. Leusch, Benchmarking organic micropollutants in wastewater, recycled water and drinking water with in vitro bioassays. Environ. Sci. Technol. 2014, 48, 1940.
Benchmarking organic micropollutants in wastewater, recycled water and drinking water with in vitro bioassays.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3sXhvV2mt73J&md5=aaff8ea999e608aee3d1665d4c0be08bCAS | 24369993PubMed |

[13]  R. S. Thomas, M. B. Black, L. L. Li, E. Healy, T. M. Chu, W. J. Bao, M. E. Andersen, R. D. Wolfinger, A comprehensive statistical analysis of predicting in vivo hazard using high-throughput in vitro screening. Toxicol. Sci. 2012, 128, 398.
A comprehensive statistical analysis of predicting in vivo hazard using high-throughput in vitro screening.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC38Xht1enurbI&md5=237e7112c6462b66a52d7e30fb9928f6CAS | 22543276PubMed |

[14]  D. Johnson, Palaeoclimate and depositional settings of Australian coal measures, in Geology of Australian Coal Basins (Eds H Ward, C Mallett, J Beeston) 1995, pp. 17–39 (Australian Geological Survey Organisation: Canberra, ACT).

[15]  S. Scott, B. Anderson, P. Crosdale, J. Dingwall, G. Leblang, Coal petrology and coal seam gas contents of the walloon subgroup – Surat Basin, Queensland, Australia. Int. J. Coal Geol. 2007, 70, 209.
Coal petrology and coal seam gas contents of the walloon subgroup – Surat Basin, Queensland, Australia.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD2sXhvVCkurg%3D&md5=264279a28bd98533ac35ba44b65cfb78CAS |

[16]  Groundwater Database. Bore Card Report 2012 (Department of Natural Resources and Mines). Available at http://www.dnrm.qld.gov.au/water/water-monitoring-and-data/portal [Verified 5 November 2014].

[17]  D. M. Nielsen, Practical Handbook of Environmental Site Characterization and Ground-Water Monitoring 2006 (CRC Press LLC: Boca Raton).

[18]  American Public Health Association, American Water Works Association, Water Environment Federation, Standard Methods for the Examination of Water and Wastewater 1999 (American Public Health Association: Washington, DC).

[19]  J. Y. M. Tang, E. Glenn, R. Aryal, W. Gernjak, B. I. Escher, Toxicity characterization of urban stormwater with bioanalytical tools. Water Res. 2013, 47, 5594.
Toxicity characterization of urban stormwater with bioanalytical tools.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3sXhtFShtb3I&md5=b6a383bf4c9e5593d109e10cddb63f41CAS |

[20]  M. Macova, S. Toze, L. Hodgers, J. F. Mueller, M. Bartkow, B. I. Escher, Bioanalytical tools for the evaluation of organic micropollutants during sewage treatment, water recycling and drinking water generation. Water Res. 2011, 45, 4238.
| 1:CAS:528:DC%2BC3MXotlektb4%3D&md5=ceee28966f46f836213d5cd1a925efdbCAS | 21704353PubMed |

[21]  S. R. Nagy, J. R. Sanborn, B. D. Hammock, M. S. Denison, Development of a green fluorescent protein-based cell bioassay for the rapid and inexpensive detection and characterization of Ah receptor agonists. Toxicol. Sci. 2002, 65, 200.
Development of a green fluorescent protein-based cell bioassay for the rapid and inexpensive detection and characterization of Ah receptor agonists.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD38XhtVynt7c%3D&md5=3dc05a10918a506de4c2121c3736618eCAS | 11812924PubMed |

[22]  B. Zhao, D. S. Baston, E. Khan, C. Sorrentino, M. S. Denison, Enhancing the response of CALUX and CAFLUX cell bioassays for quantitative detection of dioxin-like compounds. Science China Chem. 2010, 53, 1010.
Enhancing the response of CALUX and CAFLUX cell bioassays for quantitative detection of dioxin-like compounds.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3cXmslOhs74%3D&md5=28fdc8dcb8c071b9884f809fc8e1f9cbCAS |

[23]  L. Jin, L. van Mourik, C. Gaus, B. Escher, Applicability of passive sampling to bioanalytical screening of bioaccumulative chemicals in marine wildlife. Environ. Sci. Technol. 2013, 47, 7982.
Applicability of passive sampling to bioanalytical screening of bioaccumulative chemicals in marine wildlife.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3sXptFeit7c%3D&md5=7260fc61f7e3d89a64163251227aef7dCAS | 23758596PubMed |

[24]  S. C. van der Linden, M. B. Heringa, H. Y. Man, E. Sonneveld, L. M. Puijker, A. Brouwer, B. van der Burg, Detection of multiple hormonal activities in wastewater effluents and surface water, using a panel of steroid receptor CALUX bioassays. Environ. Sci. Technol. 2008, 42, 5814.
Detection of multiple hormonal activities in wastewater effluents and surface water, using a panel of steroid receptor CALUX bioassays.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1cXntlKqsLY%3D&md5=6e29dd1dafc3491394d02553584002ecCAS | 18754514PubMed |

[25]  B. van der Burg, R. Winter, M. Weimer, P. Berckmans, G. Suzuki, L. Gijsbers, A. Jonas, S. van der Linden, H. Witters, J. Aarts, J. Legler, A. Kopp-Schneider, S. Bremer, Optimization and prevalidation of the in vitro ER alpha CALUX method to test estrogenic and antiestrogenic activity of compounds. Reprod. Toxicol. 2010, 30, 73.
Optimization and prevalidation of the in vitro ER alpha CALUX method to test estrogenic and antiestrogenic activity of compounds.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3cXotVeqtLg%3D&md5=7c9d0b3f08feac1449c39d2afb0f0d35CAS | 20435135PubMed |

[26]  B. van der Burg, R. Winter, H. Y. Man, C. Vangenechten, P. Berckmans, M. Weimer, H. Witters, S. van der Linden, Optimization and prevalidation of the in vitro AR CALUX method to test androgenic and antiandrogenic activity of compounds. Reprod. Toxicol. 2010, 30, 18.
Optimization and prevalidation of the in vitro AR CALUX method to test androgenic and antiandrogenic activity of compounds.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3cXotVeqt7Y%3D&md5=2d2e89a39dbfa7dc930b584783bb9faeCAS | 20438827PubMed |

[27]  K. Bekki, H. Takigami, G. Suzuki, N. Tang, K. Hayakawa, Evaluation of toxic activities of polycyclic aromatic hydrocarbon derivatives using in bitro bioassays. J. Health Sci. 2009, 55, 601.
Evaluation of toxic activities of polycyclic aromatic hydrocarbon derivatives using in bitro bioassays.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1MXpsVKrtrc%3D&md5=66373aa27e58dcc070854e67739f54c7CAS |

[28]  J. Freitas, P. Cano, C. Craig-Veit, M. L. Goodson, J. David Furlow, A. J. Murk, Detection of thyroid hormone receptor disruptors by a novel stable in vitro reporter gene assay. Toxicol. In Vitro 2011, 25, 257.
Detection of thyroid hormone receptor disruptors by a novel stable in vitro reporter gene assay.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3cXhs1agsLbI&md5=9f22df89d4e77acd8278e1f91cb53d27CAS | 20732405PubMed |

[29]  Y. Oda, S.-i. Nakamura, I. Oki, T. Kato, H. Shinagawa, Evaluation of the new system (umu-test) for the detection of environmental mutagens and carcinogens. Mutat. Res. 1985, 147, 219.
Evaluation of the new system (umu-test) for the detection of environmental mutagens and carcinogens.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaL2MXlvFWhsbc%3D&md5=a28f801b8ccf493d74e4c8d52e9ebe70CAS | 3900709PubMed |

[30]  ISO 13829. Water Quality – Determination of the Genotoxicity of Water and Waste Water using the Umu-Test 2000 (International Organization for Standardization (ISO): Geneva, Switzerland).

[31]  M. Macova, B. I. Escher, J. Reungoat, S. Carswell, K. L. Chue, J. Keller, J. F. Mueller, Monitoring the biological activity of micropollutants during advanced wastewater treatment with ozonation and activated carbon filtration. Water Res. 2010, 44, 477.
Monitoring the biological activity of micropollutants during advanced wastewater treatment with ozonation and activated carbon filtration.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3cXhvFegsrc%3D&md5=55eb8056fa2b5a31e344c649fda8d88eCAS | 19854465PubMed |

[32]  A. Harder, B. I. Escher, P. Landini, N. B. Tobler, R. P. Schwarzenbach, Evaluation of bioanalytical assays for toxicity assessment and mode of toxic action classification of reactive chemicals. Environ. Sci. Technol. 2003, 37, 4962.
Evaluation of bioanalytical assays for toxicity assessment and mode of toxic action classification of reactive chemicals.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD3sXnsFegsLg%3D&md5=14af8f6fb28c26cf6ad62142c869ded6CAS | 14620824PubMed |

[33]  J. Y. M. Tang, E. Glenn, H. Thoen, B. I. Escher, In vitro bioassay for reactive toxicity towards proteins implemented for water quality monitoring. J. Environ. Monit. 2012, 14, 1073.
In vitro bioassay for reactive toxicity towards proteins implemented for water quality monitoring.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC38XivFOluro%3D&md5=59a6e4b60db1614c0f81ba929a622dc8CAS |

[34]  A. Pastore, G. Federici, E. Bertini, F. Piemonte, Analysis of glutathione: implication in redox and detoxification. Clin. Chim. Acta 2003, 333, 19.
Analysis of glutathione: implication in redox and detoxification.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD3sXksVOmt70%3D&md5=7c0081aa2f8afeb5772dbc37ab31d3ccCAS | 12809732PubMed |

[35]  B. I. Escher, M. Dutt, E. Maylin, J. Y. M. Tang, S. Toze, C. R. Wolf, M. Lang, Water quality assessment using the AREc32 reporter gene assay indicative of the oxidative stress response pathway. J. Environ. Monit. 2012, 14, 2877.
Water quality assessment using the AREc32 reporter gene assay indicative of the oxidative stress response pathway.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC38XhsFOltLjE&md5=58807d067f353209ac9c0ae31008ea25CAS | 23032559PubMed |

[36]  X. J. Wang, J. D. Hayes, C. R. Wolf, Generation of a stable antioxidant response element-driven reporter gene cell line and its use to show redox-dependent activation of Nrf2 by cancer chemotherapeutic agents. Cancer Res. 2006, 66, 10983.
Generation of a stable antioxidant response element-driven reporter gene cell line and its use to show redox-dependent activation of Nrf2 by cancer chemotherapeutic agents.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD2sXivVyqt7w%3D&md5=ae7185cc93a4fc9c27012d8c95b4954dCAS | 17108137PubMed |

[37]  M. T. Martin, D. J. Dix, R. S. Judson, R. J. Kavlock, D. M. Reif, A. M. Richard, D. M. Rotroff, S. Romanov, A. Medvedev, N. Poltoratskaya, M. Gambarian, M. Moeser, S. S. Makarov, K. A. Houck, Impact of environmental chemicals on key transcription regulators and correlation to toxicity end points within EPA’s ToxCast program. Chem. Res. Toxicol. 2010, 23, 578.
Impact of environmental chemicals on key transcription regulators and correlation to toxicity end points within EPA’s ToxCast program.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3cXhslSht7s%3D&md5=70f8427342dfe0066e31f2f8a6a2df62CAS | 20143881PubMed |

[38]  A. Natsch, The Nrf2-Keap1-ARE toxicity pathway as a cellular sensor for skin sensitizers-functional relevance and a hypothesis on innate reactions to skin sensitizers. Toxicol. Sci. 2010, 113, 284.
The Nrf2-Keap1-ARE toxicity pathway as a cellular sensor for skin sensitizers-functional relevance and a hypothesis on innate reactions to skin sensitizers.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3cXntlGktg%3D%3D&md5=aa798e79508548e96d0cbe74b313a3c4CAS | 19767620PubMed |

[39]  B. I. Escher, C. van Daele, M. Dutt, J. Y. M. Tang, R. Altenburger, Most oxidative stress response in water samples comes from unknown chemicals: the need for effect-based water quality trigger values. Environ. Sci. Technol. 2013, 47, 7002.
Most oxidative stress response in water samples comes from unknown chemicals: the need for effect-based water quality trigger values.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3sXivFalu70%3D&md5=e9c67631780f3c4783d8e63f6f458459CAS | 23432033PubMed |

[40]  ISO11348. Water Quality – Determination of the Inhibitory Effect of Water Samples on the Light Emission of Vibrio fischeri (Luminescent Bacteria Test). Part 1: Method using Freshly Prepared Bacteria 2007 (International Organization for Standardization (ISO): Geneva, Switzerland).

[41]  B. I. Escher, N. Bramaz, J. F. Mueller, P. Quayle, S. Rutishauser, E. L. M. Vermeirssen, Toxic equivalent concentrations (TEQs) for baseline toxicity and specific modes of action as a tool to improve interpretation of ecotoxicity testing of environmental samples. J. Environ. Monit. 2008, 10, 612.
Toxic equivalent concentrations (TEQs) for baseline toxicity and specific modes of action as a tool to improve interpretation of ecotoxicity testing of environmental samples.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1cXlt1GjsLc%3D&md5=b19f2909e508871d6c47885bb12171a9CAS | 18449398PubMed |

[42]  J. Y. M. Tang, S. McCarty, E. Glenn, P. A. Neale, M. S. Warne, B. I. Escher, Mixture effects of organic micropollutants present in water: towards the development of effect-based water quality trigger values for baseline toxicity. Water Res. 2013, 47, 3300.
Mixture effects of organic micropollutants present in water: towards the development of effect-based water quality trigger values for baseline toxicity.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3sXmtlejs70%3D&md5=1440921f7cedf726b4ab8e77fc91b93eCAS |

[43]  B. Johnson, Microtox acute toxicity test, in Small-Scale Freshwater Toxicity Investigations (Eds C. Blaise, J.-F. Férard) 2005, pp. 69–105 (Springer: Dordrecht, the Netherlands).

[44]  F. D. L. Leusch, S. J. Khan, S. Laingam, E. Prochazka, T. Trinh, S. Froscio, H. F. Chapman, A. Humpage, Assessment of the application of bioanalytical tools as surrogate measure of chemical contaminants in recycled water. Water Res. 2014, 49, 300.
Assessment of the application of bioanalytical tools as surrogate measure of chemical contaminants in recycled water.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC2cXhsVCntLs%3D&md5=997e0d81a4a6386f5f4449990ba5d961CAS |

[45]  Harmonization Project Document Number 10. Guidance for Immunotoxicity Risk Assessment for Chemicals 2012 (WHO: Geneva, Switzerland).

[46]  A. Hounslow, Water Quality Data: Analysis and Interpretation 1995 (Lewis Publishers: Boca Raton, FL).

[47]  M. Taulis, M. Milke, Coal seam gas water from Maramarua, New Zealand: characterisation and comparison to United States analogues. J. Hydrol. 2007, 46, 1.

[48]  Talinga–Condabri Integrated CSG Water Management Plan 2013 (Origin Energy and Australia Pacific LNG). Available at http://www.aplng.com.au/pdf/Talinga-Condabri_Intergrated_CSG_Water_Management_plan.pdf [Verified 5 November 2014].

[49]  A. J. Love, A. L. Herczeg, L. Sampson, R. G. Cresswell, L. K. Fifield, Sources of chloride and implications for Cl-36 dating of old groundwater, south-western Great Artesian Basin, Australia. Water Resour. Res. 2000, 36, 1561.
Sources of chloride and implications for Cl-36 dating of old groundwater, south-western Great Artesian Basin, Australia.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD3cXkt1Cku7w%3D&md5=63b9612e684c2898444d52c58c7d40feCAS |

[50]  F. J. Alcalá, E. Custodio, Using the Cl/Br ratio as a tracer to identify the origin of salinity in aquifers in Spain and Portugal. J. Hydrol. 2008, 359, 189.
Using the Cl/Br ratio as a tracer to identify the origin of salinity in aquifers in Spain and Portugal.Crossref | GoogleScholarGoogle Scholar |

[51]  Australian and New Zealand Guidelines for Fresh and Marine Water Quality. Volume 1 2000 (Australian and New Zealand Environment Conservation Council (ANZECC) and Agriculture and Resource Management Council of Australia and New Zealand (ARMCANZ): Canberra, ACT).

[52]  R. Ayers, D. Westcot, Water Quality for Agriculture 1985 (Food and Agriculture Organization of the United Nations: Rome).

[53]  J. Hem, Study and interpretation of the chemical characteristics of natural water. US Geological Survey, Water Supply Paper 2254 1985. Available at http://pubs.usgs.gov/wsp/wsp2254/pdf/wsp2254a.pdf [Verified 24 November 2014].

[54]  National Water Quality Management Strategy. Australian Drinking Water Guidelines 2004 (National Health and Medical Research Council (NHMRC) and the Natural Resource Management Ministerial Council: Canberra, ACT).

[55]  Australian Drinking Water Guidelines Paper 6 National Water Quality Management Strategy 2011 (National Health and Medical Research Council (NHMRC) and the Natural Resource Management Ministerial Council: Canberra, ACT).

[56]  Agents classified by IARC monographs 2010 (International Agency for Research on Cancer: Lyon, France).

[57]  F. D. L. Leusch, C. De Jager, Y. Levi, R. Lim, L. Puijker, F. Sacher, L. A. Tremblay, V. S. Wilson, H. F. Chapman, Comparison of five in vitro bioassays to measure estrogenic activity in environmental waters. Environ. Sci. Technol. 2010, 44, 3853.
Comparison of five in vitro bioassays to measure estrogenic activity in environmental waters.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3cXlt1ers7k%3D&md5=cbd60a44e5eddd48884f55c79d333a83CAS |

[58]  A. Baun, S. D. Jensen, P. L. Bjerg, T. H. Christensen, N. Nyholm, Toxicity of organic chemical pollution in groundwater downgradient of a landfill (Grindsted, Denmark). Environ. Sci. Technol. 2000, 34, 1647.
Toxicity of organic chemical pollution in groundwater downgradient of a landfill (Grindsted, Denmark).Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD3cXitVGnsb0%3D&md5=7fa9697bb4ef431aac6727e7ee22a776CAS |

[59]  A. Puga, C. Ma, J. L. Marlowe, The aryl hydrocarbon receptor cross-talks with multiple signal transduction pathways. Biochem. Pharmacol. 2009, 77, 713.
The aryl hydrocarbon receptor cross-talks with multiple signal transduction pathways.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1MXhs1ahtr8%3D&md5=83fe308364b7430105fcc26b557bfb0dCAS | 18817753PubMed |

[60]  A. Puga, C. R. Tomlinson, Y. Xia, Ah receptor signals cross-talk with multiple developmental pathways. Biochem. Pharmacol. 2005, 69, 199.
Ah receptor signals cross-talk with multiple developmental pathways.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD2cXhtFGhtbbE&md5=7f6d034f3473ab2dd0c91fe45d2bc04bCAS | 15627472PubMed |

[61]  S. D. Seidel, V. Li, G. M. Winter, W. J. Rogers, E. I. Martinez, M. S. Denison, Ah receptor-based chemical screening bioassays: application and limitations for the detection of Ah receptor agonists. Toxicol. Sci. 2000, 55, 107.
Ah receptor-based chemical screening bioassays: application and limitations for the detection of Ah receptor agonists.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD3cXjtVeht7o%3D&md5=a15f014b6c1953f3b14519ea7a2c91e3CAS | 10788565PubMed |

[62]  M. Machala, J. Vondracek, L. Blaha, M. Ciganek, J. Neca, Aryl hydrocarbon receptor-mediated activity of mutagenic polycyclic aromatic hydrocarbons determined using in vitro reporter gene assay. Mutat. Res. Genet. Toxicol. Environ. Mutagen. 2001, 497, 49.
Aryl hydrocarbon receptor-mediated activity of mutagenic polycyclic aromatic hydrocarbons determined using in vitro reporter gene assay.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD3MXmt1Krs7s%3D&md5=1f492828ac5a1b0e21dae00d7fb2a676CAS |

[63]  B. Pieterse, E. Felzel, R. Winter, B. van der Burg, A. Brouwer, PAH-CALUX, an optimized bioassay for AhR-mediated hazard identification of polycyclic aromatic hydrocarbons (PAHs) as individual compounds and in complex mixtures. Environ. Sci. Technol. 2013, 47, 11 651.
PAH-CALUX, an optimized bioassay for AhR-mediated hazard identification of polycyclic aromatic hydrocarbons (PAHs) as individual compounds and in complex mixtures.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3sXhtlClsb%2FL&md5=a8e7c8934a32d5f876a1a0e40d089bbcCAS |

[64]  E. Takahashi, G. McGregor, S. Rogers, Stream Ecosystem Health Response to Coal Seam Gas Water Release: Direct Toxicity Assessment 2012 (Queensland Department of Natural Resources and Mines: Brisbane, Qld). Available at http://www.dnrm.qld.gov.au/__data/assets/pdf_file/0010/106102/stream-ecosystem-health_direct-toxicity-assessment.pdf [Verified 5 November 2014].

[65]  A. J. W. Biggs, S. L. Witheyman, K. M. Williams, N. Cupples, C. A. de Voil, R. E. Power, B. J. Stone, Final report of Activity 3 of the Healthy HeadWaters Coal Seam Gas Water Feasibility Study 2012 (Queensland Department of Natural Resources and Mines: Toowoomba, Qld, Australia). Available at http://www.dnrm.qld.gov.au/__data/assets/pdf_file/0019/106093/csg-irrigation-salinity-risk-assessment.pdf [Verified 5 November 2014].

[66]  Queensland Coal Seam Gas Overview 2011 (Department of Employment Economic Development and Innovation: Brisbane, Qld).

[67]  R. Konsoula, F. A. Barile, Correlation of in vitro cytotoxicity with paracellular permeability in Caco-2 cells. Toxicol. In Vitro 2005, 19, 675.
Correlation of in vitro cytotoxicity with paracellular permeability in Caco-2 cells.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD2MXkt1OitL8%3D&md5=ae1cbe67be2214b6d8960b6a130b8420CAS | 15896555PubMed |

[68]  F. D. L. Leusch, S. J. Khan, M. M. Gagnon, P. Quayle, T. Trinh, H. Coleman, C. Rawson, H. F. Chapman, P. Blair, H. Nice, T. Reitsema, Assessment of wastewater and recycled water quality: a comparison of lines of evidence from in vitro, in vivo and chemical analyses. Water Res. 2014, 50, 420.
Assessment of wastewater and recycled water quality: a comparison of lines of evidence from in vitro, in vivo and chemical analyses.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3sXhslCnu7jP&md5=a142e0eb25b9a341716f2ae3b04129daCAS |

[69]  A. Baqui, T. F. Meiller, J. J. Chon, B. F. Turng, W. A. Falkler, Granulocyte-macrophage colony-stimulating factor amplification of interleukin-1 beta and tumor necrosis factor alpha production in THP-1 human monocytic cells stimulated with lipopolysaccharide of oral microorganisms. Clin. Diagn. Lab. Immunol. 1998, 5, 341.
| 1:CAS:528:DyaK1cXjt1yqtbk%3D&md5=768cc27293d11a3b16044af349c20a98CAS | 9605989PubMed |

[70]  ISO2211. Liquid Chemical Products – Measurements of Colour in Hazen Units (Platinum-Cobalt Scale) 1973 (International Organization for Standardization (ISO): Geneva, Switzerland).

[71]  Public Health Regulation Schedule 3B Standards for Quality of Recycled Water Supplied to Augment a Supply of Drinking Water 2005 (Queensland Government: Brisbane, Qld).

[72]  J. H. Kwon, T. Wuethrich, P. Mayer, B. I. Escher, Development of a dynamic delivery method for in vitro bioassays. Chemosphere 2009, 76, 83.
Development of a dynamic delivery method for in vitro bioassays.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1MXmtFSit74%3D&md5=cb6e41cc02e181ea0367b50c9a19aaeaCAS | 19324392PubMed |

[73]  Coal Seam Gas Well Locations – Queensland 2014 (Department of Natural Resources and Mines Queensland Government).

[74]  B. Kilgour, National Geoscience Datasets 2001 (Geoscience Australia. Canberra, ACT).

[75]  W. Stearman, M. Taulis, J. Smith, M. Corkeron, Assessment of genogenic contaminants in water co-produced with coal seam gas extraction in Queensland, Australia: implications for human health risk. Geosciences 2014, 4, 219.
Assessment of genogenic contaminants in water co-produced with coal seam gas extraction in Queensland, Australia: implications for human health risk.Crossref | GoogleScholarGoogle Scholar |