Novel pre-treatment of zeolite materials for the removal of sodium ions: potential materials for coal seam gas co-produced wastewater

Chapman, J 2016, 'Novel pre-treatment of zeolite materials for the removal of sodium ions: potential materials for coal seam gas co-produced wastewater', SpringerPlus, vol. 5, no. 1, pp. 1-1.


Document type: Journal Article
Collection: Journal Articles

Title Novel pre-treatment of zeolite materials for the removal of sodium ions: potential materials for coal seam gas co-produced wastewater
Author(s) Chapman, J
Year 2016
Journal name SpringerPlus
Volume number 5
Issue number 1
Start page 1
End page 1
Total pages 1
Publisher SpringerOpen
Abstract Coal seam gas (CSG) is the extraction of methane gas that is desorbed from the coal seam and brought to the surface using a dewatering and depressurisation process within the saturated coalbed. The extracted water is often referred to as co-produced CSG water. In this study, co-produced water from the coal seam of the Bowen Basin (QLD, Australia) was characterised by high concentration levels of Na+(1156 mg/L), low concentrations of Ca2+(28.3 mg/L) and Mg2+(5.6 mg/L), high levels of salinity, which are expected to cause various environmental problems if released to land or waters. The potential treatment of co-produced water using locally sourced natural ion exchange (zeolite) material was assessed. The zeolite material was characterized for elemental composition and crystal structure. Natural, untreated zeolite demonstrated a capacity to adsorb Na+ions of 16.16 mEq/100 g, while a treated zeolite using NH4+using a 1.0 M ammonium acetate (NH4C2H3O2) solution demonstrated an improved 136 % Na+capacity value of 38.28 mEq/100 g after 720 min of adsorption time. The theoretical exchange capacity of the natural zeolite was found to be 154 mEq/100 g. Reaction kinetics and diffusion models were used to determine the kinetic and diffusion parameters. Treated zeolite using a NH4+pre-treatment represents an effective treatment to reduce Na+concentration in coal seam gas co-produced waters, supported by the measured and modelled kinetic rates and capacity.
Subject Analytical Chemistry not elsewhere classified
Keyword(s) Coal seam gas (CSG)
CSG water management
Ion exchange
Saline water
Water treatment
Zeolite
DOI - identifier 10.1186/s40064-016-2174-9
Copyright notice © 2016, Santiago et al.
ISSN 2193-1801
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