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Presence, movement, and fate of polycyclic aromatic hydrocarbons in wastes from the production of natural gas

Thesis/Dissertation ·
OSTI ID:6913192
Large volumes of liquid and solid wastes are generated during all aspects of natural gas development and are discharged, usually with limited or no treatment, into earthen waste pits or disposed through reinjection in wells. The overall objectives of this thesis were (1) preparation of a comprehensive measure of generation, environmental release, and fate of organic and hazardous organic compounds form natural gas production, processing, and distribution, (2) evaluation of the complexity, abundance, and composition of hazardous organic compounds in natural gas and in wastes generated throughout the natural gas operations, and (3) documentation of the environmental presence of large hydrocarbons including polycyclic aromatic hydrocarbons (PAH) from earthen waste disposal pits for natural gas production. Natural gas and residues on inner-walls of natural gas pipelines were analyzed and were comprised of a complex mixture of hydrocarbons including PAH with carbon numbers from 9 to 40 at concentration levels of 0.1 to 10 ppm. In addition, samples of liquid contents and soils from natural gas production including brine water, dehydrator, pipeline drip pits, and discharge water from hydrostatic testing were collected and characterized for hazardous organic compounds. At all sites for waste generation, aliphatic and aromatic hydrocarbons with carbon number from 10 to 30+ were detected as complex mixtures and were resolved using capillary GC and GC/MS techniques. Hydrocarbons and PAH were found in surface soil at up to depth of 3 meters and in soil at ground water level at distances of 25 m from unlined earthen waste pits.
Research Organization:
New Mexico State Univ., Las Cruces (USA)
OSTI ID:
6913192
Country of Publication:
United States
Language:
English