Abstract:
:The rapid development of high-volume horizontal hydraulic fracturing for mining natural gas from shale has posed potential impacts on human health and biodiversity. The produced flow back waters after hydraulic stimulation are known to carry high levels of saline and total dissolved solids. To understand the toxicity and potential carcinogenic effects of these wastewaters, flow back waters from five Marcellus hydraulic fracturing oil and gas wells were analyzed. The physicochemical nature of these samples was analyzed by inductively coupled plasma mass spectrometry and scanning electron microscopy/energy dispersive X-ray spectroscopy. A cytotoxicity study using colony formation as the endpoint was carried out to define the LC50 values of test samples using human bronchial epithelial cells (BEAS-2B). The BEAS-2B cell transformation assay was employed to assess the carcinogenic potential of the samples. Barium and strontium were among the most abundant metals in these samples and the same metals were found to be elevated in BEAS-2B cells after long-term treatment. BEAS-2B cells treated for 6weeks with flow back waters produced colony formation in soft agar that was concentration dependent. In addition, flow back water-transformed BEAS-2B cells show better migration capability when compared to control cells. This study provides information needed to assess the potential health impact of post-hydraulic fracturing flow back waters from Marcellus Shale natural gas mining.
journal_name
Toxicol Appl Pharmacoljournal_title
Toxicology and applied pharmacologyauthors
Yao Y,Chen T,Shen SS,Niu Y,DesMarais TL,Linn R,Saunders E,Fan Z,Lioy P,Kluz T,Chen LC,Wu Z,Costa M,Zelikoff Jdoi
10.1016/j.taap.2015.07.011subject
Has Abstractpub_date
2015-10-01 00:00:00pages
121-30issue
1eissn
0041-008Xissn
1096-0333pii
S0041-008X(15)30037-5journal_volume
288pub_type
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