Analysis of vertical transportation mechanism of VOCs from horizontal hydraulic fracturing wastewater

Lanting, Ma and Llamas Borrajo, Juan Francisco and Hurtado Bezos, Antonio and Eguilior Díaz, Sonsoles (2017). Analysis of vertical transportation mechanism of VOCs from horizontal hydraulic fracturing wastewater. In: "XII Congreso nacional y XI ibérico de geoquímica", 26-28 Septiembre 2017, Linares (Jaén). pp. 136-140.

Description

Title: Analysis of vertical transportation mechanism of VOCs from horizontal hydraulic fracturing wastewater
Author/s:
  • Lanting, Ma
  • Llamas Borrajo, Juan Francisco
  • Hurtado Bezos, Antonio
  • Eguilior Díaz, Sonsoles
Item Type: Presentation at Congress or Conference (Article)
Event Title: XII Congreso nacional y XI ibérico de geoquímica
Event Dates: 26-28 Septiembre 2017
Event Location: Linares (Jaén)
Title of Book: XII Congreso nacional y XI ibérico de geoquímica
Date: 2017
Subjects:
Freetext Keywords: Organic compounds; Transportation model; Waste water; Hydraulic fracturing
Faculty: E.T.S.I. de Minas y Energía (UPM)
Department: Ingeniería Geológica y Minera
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Return water including high concentration salts and toxic organic compounds will be stored on the surface in storage tanks and/or ponds after hydraulic fracturing operation. The potential contamination risk associated with hydraulic fracturing wastewater disposal is several orders of magnitude larger than the other pathways. Even in a bestcase scenario, it was very likely that an individual well would release at least 200 m3 of contaminated fluids (Rozell and Reaven, 2012). Wastewater spills via faulty storage could lead to groundwater contamination, volatile to atmosphere and/or be adsorbed in the solid phase creating a risk of negative impacts on the environmental compartments, water, soil, air, and on human health. An analytical 1D vertical transport model of Volatile organic compounds (VOCs), grouped into nine families according to their similar behavior, through vadose zone to groundwater is settled by assuming linear, equilibrium partitioning between vapor, liquid and absorbed chemical solid phase. The evaluated maximum concentration of each organics in storage tanks as representative example of surface storage was used. The transportation results shown that the higher value of external recharge rate and water solubility of organic compounds, the faster the organic compounds are dissolved and migrate to the aquifer. In this model, Henry’s constant and recharge rate are both key parameters in the assessment of the cumulative mass percentage in atmosphere. Under the same conditions, comparison of the curves of gas percentage from different compounds allows to understand and conclude that to a greater number of substances with a high number of Henry’s constant greater volatility into the gas phase. For a certain VOCs, a minor amount of constitutes in atmosphere is produced in moist area compared with the gas mass percentage value in the arid zone.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainCTM2014-59828-RUnspecifiedUnspecifiedSeguridad en un proyecto de extracción de gas de esquisto

More information

Item ID: 50013
DC Identifier: http://oa.upm.es/50013/
OAI Identifier: oai:oa.upm.es:50013
Deposited by: Memoria Investigacion
Deposited on: 26 Apr 2018 06:51
Last Modified: 26 Apr 2018 06:51
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