Injection of treated coal seam gas co-produced water into deep Precipice aquifer in Surat Basin, Queensland, Australia.

This collection represents the hydrochemical data collected for samples from a field-scale aquifer injection trial and a number of laboratory sorption experiments conducted with aquifer sediments. The field trial was carried out at a site located in the Surat basin, Queensland by injecting treated coal seam gas (CSG) co-produced water into deep Precipice Sandstone formation (>1,300 mBGS). The laboratory experiments were conducted to determine the arsenic sorption characteristic of the sediment under varying geochemical conditions.\nLineage: The field injection trial was conducted from April to December 2013. The trial was divided into three phases - injection, storage and recovery. Water samples were collected during the injection and recovery phases for chemical analysis.\nThe laboratory sorption experiments were conducted from April to May 2014. Aqueous arsenic and phosphate concentrations were measured in the filtered samples after the completion of sorption experiments at ChemCentre, Perth WA. The amount of arsenic adsorbed on the sediment during the experiments was calculated as the difference between the aqueous arsenic concentrations at the start and end of the experiments.