Engineering Geology

Engineering Geology

Laboratory Studies with a Modified ABA Method for Evaluation of Pollution Potential from Carbonate Hosted Sulfide Waste Dumps in Comparison to Mineralogical Approach

Authors
Mehdi Zare
Ali Moradzadeh
Abolghasem Kamkar-Rouhani
Faramarz Doulati-Ardejani
Abstract
Introduction

"Sulfide-carbonate" deposit is a term, which comprises a series of sulfide minerals such as Zn-Pb ore minerals, mainly considered as related to weathering of Zn-Pb sulfide concentrations and influence in sedimentary hosts (carbonate). There are more than 350 Zn-Pb deposits located in Iran, including world-class deposits such as Angouran, Mehdiabad and Irankouh. Due to the mining activity of these deposits, it creates a significant amount of mine waste that releases of these wastes in the environment causing severe problems. One of the main problems is the formation of Acid Mine Drainage (AMD). AMD is produced by oxidation of sulphide minerals, particularly pyrite (FeS2) in waste dump. Due to low pH and the ability to dissolve metals and other compounds, it can host a number of environmental problems. A phenomenon known as natural or alkaline mine drainage (NAMD) occurs at high pH values ​​when the neutralizing minerals are significantly present in the mine waste or when the oxidation of the sulfide minerals is poor. However, the metals and cationic species, such as Cu, Pb and Cd, are more soluble at low pH. In contrast, elements that form anionic species, such as Se, Cr, V, and Mo, tend to be more soluble at high pH and Ni, Zn, Co, As, and Sb, are soluble at near-neutral pH, and can potentially contaminate mine effluents, even without acidic conditions. Therefore Acid or Neutralization potential (AP&NP) of waste dump is significantly affects on the composition, transfers and fates of contaminations transmitted from waste dump. The aim of this study was to monitoring heavy metals concentrations and assessments of pollution potential of waste dumps in Anguran mine by static method and has been compared by mineralogical approach.

Material and methods

The Angouran Zn-Pb deposit is located in the 135 kilometers southwest part of Zanjan Province, NW Iran. This area belongs to the northwestern part of the Sanandaj-Sirjan Zone, a metamorphic belt related to the Zagros orogeny. Angouran mine is one of the most important carbonate hosted Zn-Pb deposits in Iran that mining activity has been created a significant amount of waste dump in around pit. To achieve the goals, the 47 samples taken from different surficial parts of the waste dump were analyzed by using the ICP-MS method to determine the concentration of elements and heavy metals. These elements and metals includes: Ca, Mg, S and As, Cd, Cr, Cu, Ni, Pb, Zn. The pollution index (PI) were modeled for heavy metal contamination risk zoning then modified Acid Base Accounting (ABA) static method was used to evaluate of acid and neutralization potential (AP&NP) of the waste dump samples and the results were modeled by Kriging method. At the end, mineralogical approach (Mg + Ca concentration) was used to determine the source of neutralization and to better interpret the static results.

Results and discussion

The results of contamination index showed that zinc, arsenic and cadmium had the highest average contamination index (18.89, 12.13 and 5.8, respectively) and the trend of total metal changes in the region as Zn> As> Cd> Pb > Ni> Cr> Cu was rated.

Datas measured in modified ABA method were modeled in 2D maps using the Kiriging method. Due to the low total sulfur content (less than 1%), all of the samples were Net Neutralization Potential (NNP) with a range of 49- 990 kg calcium carbonate per ton, and the study area was classified into three neutralization potential (NP), High (NP) and Very High (NP) levels. The mineralogical approach (Mg + Ca concentration) was used as a useful tool for better interpretation of modified ABA results and determines the neutralizing source. Mineralogical approach results indicate that calcite species are the main source of neutralization and have high correlation coefficient (R = 0.99) with the modified ABA method. In order to validate the results, the presence of mineral calcite was confirmed by XRD analysis on 4 samples.

Assessment of AP and NP of sulfide – carbonate waste dump in this research can be used as a basis model for other similar mines to control environmental problems and to identify the behavior and to transfer heavy metals in mine drainage in the future. Mineralogical approach results show that neutralizing potential and neutralizing source can be obtained without using expensive mineralogy analyses in this type of carbonate-sulfide deposit






Keywords
Pollution potential
Waste dump
Acid mine drainage
Sulfide-carbonate
Static
1. Leach D. L., Bradley D. C., Huston D., Pisarevsky S. A., Taylor R. D., Gardoll S. J., "Sediment-Hosted Lead-Zinc Deposits in Earth History", Econ. Geol, Vol. 105 (2010) 593-625.## 2. گیلبرت ج. ا.، پارک چ. ا.، "زمین‌شناسی کانسارها"، چاپ سوم، ترجمۀ علیرضایی سعید، تهران، انتشارات چاپ و نشر بین الملل (1395) ## 3. Rajabi A., Rastad E, Canet C., Alfonso P., "The early Cambrian Chahmir shale-hosted Zn-Pb deposit, Central Iran: an example of vent-proximal SEDEX mineralization", Miner. Deposita (2015). DOI 10.1007/s00126-014-0556-x. ## 4. Maghfouri S., Hossenzadeh M. R., Rajabi A., Choulet F., "A review of major non sulfide zinc deposits in Iran", Geoscience Frontiers (2017) 1-25. http://dx.doi.org/10.1016/j.gsf.2017.04.003## 5. دولتی ارده‌جانی ف.، شفائی تنکابنی س. ض.، میرحبیبی ع.، بدیعی خ.، "بیوتکنولوژی، ژئوشیمی زیست‌محیطی و مدیریت پساب‌ها: جلد اول- پساب‌های معدنی"، پژوهشکدۀ صنایع رنگ ایران، چاپ دانشگاه صنعتی شاهرود (1383). ## 6. Singh R.N., Doulati Ardejani F., "Evaluation of factors affecting pyrite oxidation and subsequent pollutant generation in backfilled open cut coal mines", 8th International Congress on Mine Water and the Environment, Johannesburg, South Africa (2003) 173-186. ## 7. Kuyucak N., "Role of microorganisms in mining: generation of acid rock drainage and its mitigation and treatment", Eur. J. Miner. Process. Environ. Prot. 2 (2002) 179-196. ## 8. Nowaczyk K., Domka F., "Oxidation of Pyrite and Marcasite by Thiobacillus ferrooxidans Bacteria", Polish Journal of Environmental Studies Vol. 9, No. 2 (2000) 87-90. ## 9. (GARD) "Global Acid Rock Drainage uide", http://www.gardguide.com (2018). ## 10. Parbhakar-Fox A. K., Fox N., Hill R., Ferguson T., Maynard B., "Improved mine waste characterisation through static blended test work", Minerals Engineering, Volume 116 (2018) 132-142. https://doi.org/10.1016/j.mineng.2017.09.011## 11. Dold B., "Acid rock drainage prediction: A critical review", Journal of Geochemical Exploration 172 (2017) 120-132. ## 12. Sherlock E. J., Lawrence R. W., Poulin R., "On the neutralization of acid rock drainage by carbonate and silicate minerals", Environ. Geol. 25 (1995) 43-54. ## 13. Broughton L. M., Robertson A., "Modelling of leachate quality from acid generating waste rock dumps", Preprint for the Second International Conference on the Abatement of Acidic Drainage, Montreal, Quebec (1991) 18. ## 14. Hageman P. L., Seal R. R., Diehl S. F., Piatek N. M., Lowers H. A., "Evaluation of selected static methods used to estimate element mobility, acid-generating and acidneutralizing potentials associated with geologically diverse mining wastes", Appl. Geochem. 57 (2015) 125-139. ## 15. Plante B., Benzaazoua M., Bussière B., "Predicting Geochemical Behaviour of Waste Rock with Low Acid Generating Potential Using Laboratory Kinetic Tests", Mine Water Environ, (2010) 20. DOI 10.1007/s10230-010-0127-z## 16. Petrini R., Cidu R., Slejko F. F., "Thallium Contamination in the Raibl Mine Site Stream Drainage System (Eastern Alps, Italy)", Mine Water Environ. 35, (2016) 55-63. doi:10.1007/s10230-015-0346-4## 17. Qishlaqi A., Moore F., Forghani G., "Assessing the Spatial Variability of Total and Available Cadmium in Soils of the Angouran Area, NW Iran", Soil Sediment Contam. 19 (2010) 707-724. doi:doi:10.1080/15320383.2010.499919## 18. Qishlaqi A., Moore F., Forghani G., "Characterization of metal pollution in soils under two landuse patterns in the Angouran region, NW Iran; a study based on multivariate data analysis", J. Hazard. Mater. 172, (2009) 374-384. Doi:10.1016/j.jhazmat,2009.07.024## 19. Sharafi A., Doulati F., Rezaei B., Sargheini J., "Environmental geochemistry of near-neutral waters and mineralogy of zinc and lead at the Angouran non-sulphide zinc mine, NW Iran", Journal of Geochemical Exploration, (2017) 1-52.Doi:10.1016/j.gexplo.2017.11.020## 20. قدیمی س.، نباتیان ق.، "بررسی زمین شیمیایی معدن روی- سرب انگوران و اثرات فعالیت‌های معدنکاری بر آلودگی منطقه"، مجلۀ زمین‌شناسی کاربردی پیشرفته، شمارۀ 13 (1393) 66-56. ## 21. Bouzahzah H., Benzaazoua M., Bussiere B., Plante B., "Prediction of Acid Mine Drainage: Importance of Mineralogy and the Test Protocols for Static and Kinetic Tests", Mine Water Environ, 33 (2014) 54-65. DOI 10.1007/s10230-013-0249-1## 22. Lawrence R. W., Poling G. W., Marchant P. B., "Investigation of predictive techniques for acid mine drainage", MEND/NEDEM report 1.16.1a, Canadian Centre for Mineral and Energy Technology, Ottawa, Canada (1989). ## 23. Kwong Y. T. J., "Prediction and prevention of acid rock drainage from a geological and mineralogical perspective", MEND Report 1.32.1, CANMET, Ottawa, ON, Canada, (1993). ## 24. Boni M., Gilg A. H., Balassone G., Schneider J., Allen C. R., Moore F., "Hypogene Zn carbonate ores in the Angouran deposit, NW Iran", Miner Depositam 42 (2007) 799-820. DOI: 10.1007/s00126-007-0144-4## 25. Daliran F., Pride K.,Walther J., Berner Z. A., Bakker R. J., "The Angouran Zn (Pb) deposit, NW Iran: evidence for a two stage, hypogene zinc sulfideezinc carbonates mineralization", Ore Geology Reviews, 53 (2013) 373--402. Doi:10.1016/j.oregeorev.2013.02.002. ## 26. Gilg H. A., Allen C. R., Balassone G., Boni M., Moore F., "The 3-stage evolution of the Angouran Zn “oxide”-sulfide deposit, Iran", In: Eliopoulos,D.G., et al. (Ed.),Mineral Exploration and Sustainable Development. Millpress, Rotterdam, (2003) 77-80. ## 27. Ghadimi S., Forghani G., Kazemi G. A., "Distribution, geochemistry, and mineralogy of aerosols in the Angouran Mine area, northwest Iran", Environ Geochem Health, (2018), Published online, https://doi.org/10.1007/s10653-018-0084-1## 28. "ضوابط و استانداردهای زیست‌محیطی در ایران"، سازمان حفاظت محیط‌زیست، دفتر آب و خاک (1398) ## 29. Jiang X., Lu W. X., Zhao H. Q., Yang Q. C., Yang Z. P., "Potential ecological risk assesment and prediction of soil heavy-metal pollution around coal gangue dump, Nat. Hazards Earth Syst. Sci., 14 (2014) 1599-1610 ## 30. Sobek A. A., Schuller W. A., Freeman J. R., Smith R. M.,"Field and laboratory methods applicable to overburdens and minesoil", EPA report no. EPA-600/2-78-054, US Govt Printing Office, Washington, (1978) 47-50. ## 31. White W. W., Lapakko K. A., Cox R. L., "Static-test methods most commonly used to predict acid mine drainage: practical guidelines for use and interpretation", In: Plumlee, G.S., Logsdon, M.J. (Eds.), The Environmental Geochemistry of Ore Deposits. Part A: Processes, Techniques, and Health Issues. Reviews in Economic Geology (1999) 325-338. ## 32. Lawrence R. W., Wang Y., "Determination of neutralizing potential for acid rock drainage prediction", MEND/NEDEM report 1.16.3, Canadian Centre for Mineral and Energy Technology, Ottawa, Canada. (1996) 149. ## 33. Mohammadi Z., Modabberi S., Jafari M. R., Ajayebi K. S., "Comparison of different static methods for assessment of AMD generation potential inmining waste dumps in the Muteh Gold Mines, Iran", Environ Monit Assess, 187:374, (2015) 1-14. DOI 10.1007/s10661-015-4306-z## 34. معتمدیراد م.، مختاری ل، گ.، بهرامی ش.، اسدی م، ع، ز.، "ارزیابی میزان آلودگی ناشی از عناصر سنگین در رسوبات حوضه کارستی روئین"، پژوهش‌های دانش زمین، سال نهم، شمارۀ 36 (1397) 166-146. ## 35. Taylor J. C., Hinczak I., "Rietveld made easy: a practical guide to the understanding of the method and successful phase quantifications", Sietronics Pty Ltd (2001). ## 36. Paktunc A. D., "ModAn-a computer program for estimating mineral quantities based on bulk composition: windows version", Computers & Geosciences 27 (2001) 883-886. ## 37. Paktunc A. D., "Mineralogical constraints on the determination of neutralization potential and prediction of acid mine drainage", Environmental Geology 39, Springer-Verlag (1999) 103-112. ##