{"doi":"10.1144/1467-7873/07-164","title":"The long-term stability of a metal-laden Bauxsol™ reagent under different geochemical conditions","abstract":null,"journal":"Geochemistry: Exploration, Environment, Analysis","year":2009,"id":675870,"datarank":1.045686204993312,"base_score":2.995732273553991,"endowment":2.995732273553991,"self_citation_contribution":0.4493598410330987,"citation_network_contribution":0.5963263639602132,"self_endowment_contribution":0.4493598410330987,"citer_contribution":0.5963263639602132,"corpus_percentile":null,"corpus_rank":null,"citation_count":19,"citer_count":7,"citers_with_citation_signal":7,"citers_with_endowment":7,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":null,"is_data_producer":false,"deposit_databanks":null,"is_oa":false,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":null,"fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":1765961,"name":"J. Berry","orcid":null,"position":1,"is_corresponding":false},{"id":1765963,"name":"D. McConchie","orcid":null,"position":2,"is_corresponding":false},{"id":1317447,"name":"M. Clark","orcid":"0000-0003-3942-4401","position":0,"is_corresponding":false}],"reference_count":0,"raw_metadata":{"has_enrichment":true,"resolved":true,"title":"The long-term stability of a metal-laden Bauxsol™ reagent under different geochemical conditions","abstract":"Although Bauxsol™ technology is gaining acceptance for treatment of acid rock drainage and industrial effluents, most leaching studies of spent reagent have used material that has been stored in well-oxygenated conditions for no more than a few weeks. Consequently, few long-term stability data are available to predict potential metal release under various geochemical conditions. This study investigates the simulated aging of a metal-laden Bauxsol™ reagent under oxic, anoxic and anoxic-reducing conditions. Long-term stability under oxic conditions was simulated by sealing samples in 50 ml centrifuge tubes with a small quantity of water (to facilitate metal transfer and mineral recrystallization reactions), and allowing the contents to age at 65°C over about 3 months. Anoxic conditions were maintained for 6 months in 200-l drums of seawater, using nitrogen to displace any dissolved oxygen; Eh remained between +50 and +100 mV and dissolved oxygen was maintained at2S; the dissolved oxygen content remained0.3 mg/l and the water Eh less than −350 mV. The proportion of most metals extractable with pH 2.88 buffered acetic acid extractant (used to indicate relative leachability) decreased by between 25 and >75% during aging under all tested conditions (i.e. the longer the samples were left, the less metal could be extracted) although minor short-term (2–4 weeks) increases in metal mobility were detected with anoxic and anoxic-reducing samples. The data show that metals bound by Bauxsol™ reagents become increasingly resistant to leaching over time. The precipitation of insoluble sulphides, low solubility carbonates, hydroxycarbonates or hydroxysulphates, and solid-state diffusion process may explain the observed decreases. A measured increase of c. 16% in the mean volume of hematite crystallites over 3 months in oxic conditions also admits the possibility that metals may be incorporated as impurities in growing oxide and oxyhydroxide crystals.","is_dataset_classified":null,"base_score":2.995732273553991,"endowment":2.995732273553991,"datacite_reuse_total":0,"file_count":0,"downloads":0,"views":0,"has_version_chain":false,"is_dataset":false,"is_oa":false,"pmid":"26207759","pmcid":null,"openalex_id":"https://openalex.org/W2129122843","authors":[],"funders":[],"total_grants":0,"fwci":2.4171,"citation_percentile":0.87353684,"influential_citations":0,"citation_trend":[{"year":2012,"count":1},{"year":2013,"count":1},{"year":2014,"count":2},{"year":2015,"count":3},{"year":2016,"count":1},{"year":2017,"count":1},{"year":2019,"count":1}],"oa_status":"closed","license":"https://doi.org/10.15223/policy-002","oa_locations":[{"url":"https://www.lyellcollection.org/doi/pdf/10.1144/1467-7873/07-164","host_type":"publisher"},{"url":"https://doi.org/10.1144/1467-7873/07-164","host_type":"journal"},{"url":"https://epubs.scu.edu.au/esm_pubs/2326","host_type":"repository"}],"fields_of_study":["Mine drainage and remediation techniques","Extraction and Separation Processes","Metal Extraction and Bioleaching"],"mesh_terms":[],"keywords":["Term (time)","Reagent","Stability (learning theory)","Environmental science","Geology","Chemistry","Computer science","Organic chemistry","Physics"],"sdg_mappings":[{"sdg_number":0,"sdg_label":"Life below water"},{"sdg_number":0,"sdg_label":"Clean water and sanitation"}],"linked_datasets":[],"clinical_trials":[],"software_tools":[],"database_accessions":[],"source":"live","citation_network_status":"fetched"},"created_at":"2026-08-17T01:48:30.069447Z","pmid":null,"pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}