50ab0a1b-2946-b877-e063-3050940a27f3 English nonGeographicDataset non geographic dataset British Geological Survey +44 115 936 3100 Environmental Science Centre,Keyworth NOTTINGHAM NOTTINGHAMSHIRE NG12 5GG United Kingdom enquiries@bgs.ac.uk pointOfContact 2026-06-24 UK GEMINI 2.3 http://data.bgs.ac.uk/id/dataHolding/13608681 Electrokinetic test results on porphyry copper mine tailings from Philex Padcal Mine, Benguet, Philippines 2026-04-28 creation http://data.bgs.ac.uk/id/dataHolding/13608681 This dataset comprises results from electrokinetic (EK) leaching tests conducted under controlled laboratory conditions. The experiments were designed to investigate the recovered metals from mine tailings under electric field when exposed to twelve different solvents. The dataset includes the concentrations of metals leached at the end of each experiment, as well as the pH of the tailings following the leaching treatment. The porphyry copper (Cu) tailings used in this test were sourced from Tailings Storage Facility 1 (TSF1) at the Philex Padcal Mine (Benguet, Philippines). The twelve solvents tested comprised inorganic acids (nitric, sulfuric, and hydrochloric), organic acids (citric, acetic, and malonic), chloride solutions (sodium chloride and ferric chloride), and three deep eutectic solvents. A conventional three-compartment high-density polyethylene (HDPE) reactor (2 cm wall thickness) was used for the experiments. Compartments I (hosting anode) and III (hosting cathode) had identical internal dimensions (length = 5 cm, width = 10 cm, height = 10 cm) and contained the solvents, which was called anolyte and catholyte, respectively. Compartment II (length = 2.5 cm, width = 10 cm, height = 10 cm), located between Compartments I and III, held the tailings sample. For each EK test, 2V/cm voltage gradient applied for 7 days. 200 g of tailings was placed into Compartment II and gently compacted using an HDPE panel to achieve a flat surface and a bulk density of 1.6 g per cube cm, consistent with field measurements. The sample was then fully saturated with 40 mL of the designated solvent. Additional solvent was added to Compartments I and III until the liquid level equilibrated with the tailings surface in Compartment II, resulting in a total lixiviant volume of 500 mL Yujie Yan University of Exeter not available originator Rich Crane University of Exeter not available originator Enquiries British Geological Survey United Kingdom not available distributor Enquiries British Geological Survey United Kingdom not available pointOfContact notApplicable https://resources.bgs.ac.uk/images/geonetworkThumbs/50ab0a1b-2946-b877-e063-3050940a27f3.png Geology GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Copper Tailings BGS Thesaurus of Geosciences 2022 revision Citable Data NGDC Deposited Data dataCentre NERC_DDC otherRestrictions restricted The dataset has been formally approved by BGS for access by external clients under a BGS Digital Data Licence, issued via BGS's IPR Section. The dataset must not be provided to, or be accessible by, an external client until the IPR Section confirms that signed licence documentation is in place. Refer to the IPR Section (DigitalLE@bgs.ac.) if further advice is required.. Constraint applies until 2028-04-01 otherRestrictions The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused. Either: (i) the dataset is made freely available, e.g. via the Internet, for a restricted category of use (e.g. educational use only); or (ii) the dataset has not been formally approved by BGS for access and use by external clients under licence, but its use may be permitted under alternative formal arrangements; or (iii) the dataset contains 3rd party data or information obtained by BGS under terms and conditions that must be consulted in order to determine the permitted usage of the dataset. Refer to the BGS staff member responsible for the creation of the dataset if further advice is required. He / she should be familiar with the composition of the dataset, particularly with regard to 3rd party IPR contained in it, and any resultant use restrictions. This staff member should revert to the IPR Section (ipr@bgs.ac.uk) for advice, should the position not be clear. English geoscientificInformation 2022-10-01 2024-04-10 Microsoft Excel spreadsheet (.xlsx) Enquiries British Geological Survey United Kingdom not available distributor https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item192058 WWW:DOWNLOAD-1.0-http--download Data download https://doi.org/10.5285/260a042b-3e82-41f7-9256-3aab3c038e6c WWW:LINK-1.0-http--related Citation Information - Digital Object Identifier (DOI) Yan, Y., Crane, R. (2026). Electrokinetic test results on porphyry copper mine tailings from Philex Padcal Mine, Benguet, Philippines. NERC EDS National Geoscience Data Centre. (Dataset). https://doi.org/10.5285/260a042b-3e82-41f7-9256-3aab3c038e6c information nonGeographicDataset non geographic dataset INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of Geology 2011 publication See the referenced specification false Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 publication See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF false At the end of the EK, the solution volumes in Compartments I and III were recorded. Subsamples were collected for metal concentration analysis using inductively coupled plasma optical emission spectrometry (ICP-OES). The electrode at the end of the test were immersed in 5 M nitric acid to dissolve all precipitated metals prior to analysis. The volume of nitric acid for immersing the electrodes was recorded and dissolved metal concentration was analysed by ICP-OES. The recovered metals in each test was calculated based on the concentrations and volumes. The tailings in Compartment II were subsequently dried, and their pH was determined by mixing the sample with 0.001 M CaCl2 solution at a liquid-to-solid ratio of 2:1.