Trace elements dispersion from a tailings dam and speciation in surrounding agricultural soils Kombat Mine, Otavi Mountainland, Namibia Marta Mileusnić,

Slides:



Advertisements
Similar presentations
DENUDATION: Erosion and Weathering
Advertisements

Aim: What factors cause chemical weathering?
P-saturated Ochre: Performance as a Fertiliser and Environmental Acceptability K.E. Dobbie, K.V. Heal and K.A. Smith School of GeoSciences, University.
Metal concentrations in groundwater around disturbed and undisturbed massive sulfide deposits H. Pauwels, A. Lassin, J.C. Foucher,Y. Deschamps, M. L. Tercier-Waeber,
Metals and alloys in external constructions – changes in speciation and bioavailability of corrosion-induced metal runoff upon environmental entry. Associate.
 Mylor, Saltash and Holes Bay still show high levels of Cu and Zn and are highly polluted sites compared to Tipner, Broadmarsh, Dell Quay and The Conservancy:
Case Study: Heavy metal bioavailability in a soil affected by mineral sulphides contamination following the mine spillage at Aznalcóllars (Spain) Clemente.
LABORATORY METHODS for LEACHATE ANALYSIS RESULTS Temporal and cumulative metal leaching mass. Cumulative leaching (per ha) in control treatments were:
With Don Shor & Lois Richter Gardening West of the Causeway.
Measurement of Carbonate Minerals in Aerosol Samples- A Preliminary Study Johann Engelbrecht Desert Research Institute.
Leaching assessment of air-cooled blast-furnace slag for use in road construction Sofia Lidelöw a and Mathilde Grandjean b a Division of Waste Science.
Soil Acidity and pH Causes, remediation, and measurement.
Ore deposit environments

LESSON FIVE: SOIL MANAGEMENT AND FERTILITY High Tunnel Fruit and Vegetable Production.
Determination of Dominant Trace Metal Sequestration Processes in Two Vertical Flow Bioreactors Using Modified Tessier Extractions J.A. LaBar and R.W. Nairn.
29 th International conference SEGH, 8-12 July Toulouse, FRANCE 2013 Health risk estimate for groundwater and soil contamination in the.
Soil Testing and Analysis Nutrient Management Basics
Types of Chemical Weathering. Carbonation Carbonation- the reaction between calcite and weak acids in rain water and acids in groundwater. Rocks that.
Department of Applied Chemistry and Physics Faculty of Agriculture and forestry Remediation of lead-contaminated soils - challenges and options Helinä.
Results of forest soil inventory implemented in within the scope of the demonstration project BioSoil Soil stability in ecologically and socially.
C. Reimann, U. Siewers, T. Tarvainen, L. Bityukova, J. Erikson, A. Gilucis, V. Gregorauskiene, V. Lukashev, N. Matinian & A. Pasieczna The Baltic Soil.
Seasonal Changes in Biogeochemistry of a Natural Wetland Receiving Drainage from an Abandoned Mine Diane McKnight and Eric August – University of Colorado.
 The primary acid-generating process at these sites is the dissolution of pyrite: 2FeS 2 + 7O 2 + 2H 2 O > 2Fe S O 4 + 2H 2 SO 4  Iron and/or sulfur.
Measurement of free iron content in desert dust : effect on light absorption, size dependence and soil influence S. Lafon, J.-L. Rajot, S. C. Alfaro, A.
Thuli and Mzingwane catchments’ hydrochemistry Implications for risks Thuli and Mzingwane catchments’ hydrochemistry Implications for risks 6/16/2009.
Introduction The concentration of heavy metals in the environment has increased due to, among other reasons, the influence of human activity. An increase.
Explaining Low Bioavailability of Metals in Contaminated Urban Soils Sauvé S, Ge Y, Murray P, Hendershot W Département de chimie, Université de Montréal.
An important product of Weathering.
Lead Contamination in the Belledune Area: Past and Present Prepared by Inka Milewski Conservation Council of New Brunswick October 2003.
Lecture 7: Digestion of Samples Digestion of water samples with Kjeldhl method for determination of N Destruction and extraction of soil and sludge for.
Mobility and bioaccessibility of inorganic contaminants in soils in the vicinity of copper smelters (Copperbelt, Zambia) Vojtěch ETTLER 1, Martin MIHALJEVIČ.
The geochemistry of Thai paddy soils
Lead isotopic and metallic pollution record in tree rings from the Copperbelt mining-smelting area, Zambia Martin Mihaljevič, Vojtěch Ettler, Ondřej Šebek,
1 DETECTION OF COPPER IN THE SYNTHETIC WASTEWATER BY USING PYRAZOLIDINE LUMINOL (PL) Syarifah Hikmah Julinda a, Preeda Parkpian a and Srung Smanmoo b a.
Freshwater and Groundwater THE MOST IMPORTANT RESOURCE OF ALL!!!!! John Solder Andrew McCauley.
Watershed interactions and water quality assessment of previously mined mineralized areas Willow Creek Demonstration Watershed, Madison Co., MT,
Sediments Toxicity of the rivers draining Ibadan Metropolis Southwestern, Nigeria. 1 Ajibade, O.M and 2 Abimbola, A.F. 1 Department of Earth Sciences,
PART -III Analytical Methods for Metal Speciation in Water and Solids
PROPOSED AMENDMENTS TO THE S21 LISTED ACTIVITIES OF THE AIR QUALITY ACT (ACT 39 OF 2004) Submission to the Portfolio Committee on Water and Environmental.
Reactions of Carbonate Minerals with Acid Mine Drainage: Is Dolostone or Limestone Better?
Voivodeship Inspectorate of Environmental Protection in Szczecin ASSESSMENT OF AIR QUALITY IN SZCZECIN AGGLOMERATION.
THE DISTRIBUTION OF RARE EARTH AND TRACE ELEMENTS IN FRACTIONS OF MARINE SHALE Janet Frey D. E. Grandstaff Department of Geology Temple University Philadelphia,
Resources and Energy Section 1 Section 1: Mineral Resources Preview Key Ideas Ores The Formation of Ores and Placer Deposits Uses of Mineral Resources.
Animas River Stakeholders Group January 26, 2016.
Current approaches to assess land use and surface atmosphere interactions: Irrigation, salinity and drought Joop Kroes.
Water Quality LV/2005-IB/EN/01 Final Meeting 26 June 2007 Water monitoring assessment.
MINING. Mineral Resource: Naturally occurring material in or on Earth’s crust that can be extracted and processed into useful materials for a profit.
GO C3Analyze and Evaluate Mechanisms Affecting the Distribution of Potentially Harmful Substances within an Environment. Transport of Materials Through.
Laterization Effect of Tropical Soils
M O N T E N E G R O Negotiating Team for the Accession of Montenegro to the European Union Working Group for Chapter 27 – Environment Bilateral screening:
India Water Week HEAVY METAL POLLUTION OF GROUNDWATERS OF THE NTEM WATERSHED IN YAOUNDÉ-CAMEROON (WEST AFRICA) C. DEFO; B.P.K. YERIMA; R. KAUR; N. BEMMO.
SAUD S. AL-OUD Department of Soil Water Science College of Agric. & Vet. Medicine KING SAUD UNIVERSITY.
Acid Mine Drainage : Metals in Water and Sediment Upper Lefthand Creek, Northwestern Boulder County 2003 REU Program – August 7, 2003 Roshan Cholas, University.
Project LIFE14 ENV/IT/113 - Demonstration of the suitability of dredged remediated sediments for safe and sustainable horticulture production 6 month technical.
Metals analysis in tailings of Zaida abandoned mine,
Recycling of APC fly ash in a pilot-scale road subbase
Predicting Hotspots for Heavy Metal Contamination in Bumpus Cove, TN Melissa A. Magno, Arpita Nandi, and Ingrid Luffman, Department of Geosciences, East.
By Reid Brown and Rio Diniakos
HEAVY METAL SOLUBILITY AND MOBILITY IN HUMUS LAYERS IMPACTED BY COPPER INDUSTRY IN SOUTH - WEST POLAND Agnieszka Medyńska-Juraszek, Cezary Kabała Institute.
Weathering.
Dr. Tanveer Iqbal Associate Professor,
METREAU part II Analysis Division March 10,
Airborne Contaminants from Mining Operations In Arizona
Ndimele, P.E. ; Mekuleyi, G. O. and Nweze,J. Department of Fisheries
Chapter 11 Resources & Energy.
Update on activities of Bulgaria within/related to EMEP
Assessment Heavy Metals (Pb, Zn, Cd) and Metalloids (Sb, As) Mobility in Carbonated Soils Contaminated by Mining Wastes (Northern Tunisia) Yosra Achour1,2,3,
Table 6. Bioaccumulation factors for heavy metals in rice crop
© The Author(s) Published by Science and Education Publishing.
Presentation transcript:

Trace elements dispersion from a tailings dam and speciation in surrounding agricultural soils Kombat Mine, Otavi Mountainland, Namibia Marta Mileusnić, Stanko Ružičić University of Zagreb, Croatia Benjamin Siyowi Mapani, Akalemwa Fred Kamona Isaac Mapaure, Percy Maruwa Chimwamurombe University of Namibia, Namibia

STUDY AREA - Kombat Grootfontein district latitude 19  43´S longitude 17  43´E altitude of metres inhabitants Agriculture: (1) livestock production (2) maize, potatoes, vegetables and subtropical fruits

Kombat Cu mine mining: 1962 – 2008 (46 years) 24,550,280 t of copper ore tailing dam (about 300 million T) Area: 20 haHeight: 3-4 m

winter summer Sub tropical climate Summers -very hot -heavy downpours -northeastery winds Winters (May –June) -mild -dry winters - easterly winds

Main agents of material transfer from tailings into surrounding areas WINTER - WINDSUMMER - RAIN WATER (as run-off in episodes of heavy downpours

RESEARCH GOALS (1) to determine lateral distribution and seasonal variability of trace metals, as well as dominant metal binding mechanisms in the agricultural soil (2) to identify dominant type of metal dispersion from the tailings impoundment (mechanical or chemical) (3) to carry out preliminary assessment of environmental risk associated with tailings dam

SAMPLING - after results of Kribek et al. (2006) 2) polluted soil 3) control soil 1) tailings -2 sampling campaigns: -Wet season – march -Dry season – august

Analytical work (1) bulk mineralogy of soils and tailings (XRD) (2) Pseudototal metal content of soils and tailings (aqua regia digestion, AAS) (3) Binding sites of metals (sequential leaching, AAS)

FractionLabelReagent ExchangeableADS/EXCAmmonium acetate Acid (carbonates) CARBAcetic acid ReducibleFEMNHydroxylamine hidrochloride OxidisableOR/SULHydrogen peroxide Modified after: TESSIER et al. (1979) and SULKOWSKI et al. (2006)

RESULTS Mineral content tailings: calcite and dolomite, quartz, micaceous material, +/-gypsum soil: quartz, calcite, dolomite, K-feldspar, plagioclase, clay minerals. pH tailings: circum-neutral ( ) soil: alkaline ( )

Pseudototal metal concentrations (median values in mg/kg) - no seasonal variation in concentrations Canadian soil quality guidelines (CECME, 1999) for agricultural soils Eleme nt TailingsPolluted farmland soil Control soils Cu Pb Zn Cr Ni3912 Co655 Cd3BDL

Metals binding forms in polluted soils Cu Pb

CONCLUSIONS (1) Cu and Pb showed significantly high concentration in tailings. (2) Cu and Pb in all analysed samples of farmland soils west of the tailings dam exceed maximal allowed values for agricultural soils. (3) Seasonal variations - not observed. (4) The main binding site for Cu and Pb is oxide fraction

(5) mechanical dispersion of elements from tailings dam prevails (6) carbonate minerals dominate in tailings - drainage is neutralized - lead and copper immobile (7) Pb and Cu relatively strongly bound to the soils + high pH of soil- small risk for their release in soil water and to groundwater (8) study by Casteel et al. (2006) - lead associated with iron oxide shows intermediate bioaccesibility while ingested (9) Rehabilitation of tailings dam necessary

THANK YOU FOR YOUR ATTENTION