Improvement of chemical quality of percolated leachates by in situ application of aqueous organic wastes on sulfide mine tailings.
One of the major environmental concerns in the mining industry is the generation of acid leachates from tailings deposits, which are highly concentrated in potentially hazardous elements. The continuous processing of these leachates in treatment plant is unsustainable, so the in situ chemical improv...
| Publicado en: | Journal of Environmental Management Vol. 244; pp. 154 - 161 |
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| Autores principales: | , , , , |
| Formato: | Artículo |
| Publicado: |
Academic Press Inc.
Aug2019
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| Materias: | |
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ssf&AN=136824552&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 136824552 longDbName: Social Sciences Full Text (H.W. Wilson) uiTag: AN controlInfo: bkinfo: jinfo: jid: 03014797 EMJ jtl: Journal of Environmental Management issn: 03014797 maglogo: N pubinfo: dt: Aug2019 vid: 244 pid: 735 pub: Academic Press Inc. artinfo: ui: 136824552 10.1016/j.jenvman.2019.05.040 ppf: 154 ppct: 7 formats: tig: atl: Improvement of chemical quality of percolated leachates by in situ application of aqueous organic wastes on sulfide mine tailings. aug: au: Tapia, Angela Cornejo-La Torre, Melitza Santos, Erika S. Arán, Diego Gallardo, Alfredo affil: Minera La Zanja SRL, Cajamarca, Peru Amphos 21 Consulting Peru SAC, San Borja, Lima, Peru Universidade de Lisboa, Instituto Superior de Agronomia, Linking Landscape, Environment, Agriculture and Food Research Centre, Lisbon, Portugal Inproyen Consulting SAC, San Isidro, Lima, Peru Compañía de Minas Buenaventura SAA, San Isidro, Lima, Peru su: Peru Waste management Organic wastes Leachate Environmental quality Mine waste Sewage Industrial wastes sug: subj: Waste management Peru Administration of Air and Water Resource and Solid Waste Management Programs Waste treatment and disposal Hazardous Waste Treatment and Disposal Other Nonhazardous Waste Treatment and Disposal Solid Waste Landfill Other Waste Collection Waste collection Organic wastes Leachate Environmental quality Mine waste Sewage Industrial wastes keyword: Domestic wastewater Multielemental contamination Remediation Sulfates Tailings deposits Domestic wastewater Multielemental contamination Remediation Sulfates Tailings deposits ab: One of the major environmental concerns in the mining industry is the generation of acid leachates from tailings deposits, which are highly concentrated in potentially hazardous elements. The continuous processing of these leachates in treatment plant is unsustainable, so the in situ chemical improvement of the mine wastes and their leachates, mainly with another waste produced in the mining area, can reduce treatment and operational costs. This study aimed to evaluate the effect of two types of domestic wastewaters (DWW) on the improvement of the chemical characteristics of the leachates generated from mine wastes containing sulfides. A mesocosm assay was performed under greenhouse and controlled conditions with mine wastes collected in La Zanja mining area (Peru). Three irrigation treatments were tested: untreated DWW, treated DWW and water as control. Percolated leachates of each treatment were collected once per week, for a period of 10 weeks. Electrical conductivity, pH and multi-elemental concentration were analysed. During the assay, the mine wastes generated acid leachates (≈4) with significant concentrations of elements (mg/L; Al: 1.4–30.0; Cd: 0.05–0.19; Cu: 5.7–22.1; Fe: 1.6–19.4; Mn: 2.6–26.0; Zn: 1.2–9.2) and sulfates (204.3–997.8 mg/L), which exceed the thresholds established by Peruvian legislations. After DWW application, pH in the leachates increased to ≈7 and concentrations of several studied elements (e.g. Al, As, Fe, Cu, Zn, Cd, Pb, Ni, Mn) and sulfates decreased (>70% depending on DWW type, element and sampling) compared to the control. This fact allowed that the Environmental Quality standards from Peru (except for Cu and Mn) were reached. However, an enrichment of Na and K was obtained at the same leachates. At short term, the DWW application (especially untreated) on the mine wastes containing sulfides was effective in the improvement of the general chemical quality of their leachates. Moreover, the combined management of these two studied wastes (domestic wastewater and mine wastes) represents a promising cost-effective strategy during mining operation. • Mine wastes considered as sterile from La Zanja mine have important environmental risk. • Chemical quality of leachates was improved with domestic wastewaters application. • Positive effect on leachates quality was achieved by short-time requiring repeated applications. • Combined management of two wastes from mine is an interesting solution for their recovery. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
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