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Mobility and Behaviour of Metals in Copper Mine Tailings and Soil at Khetri, India

  • Anita Punia
  • N. Siva SiddaiahEmail author
Technical Article
  • 23 Downloads

Abstract

The mobility and behaviour of metals (Cu, Zn, Ni, Cr, and Pb) in mine tailings and neighbouring soils were studied in the Khetri copper mine region, Rajasthan, India. Single reagent extraction was used to assess the mobility and availability of metals, while sequential chemical fractionation (water soluble, acidic, and reducible) was used to evaluate their behaviour in the environment. Samples were divided into two different physical grain size fractions to assess the impact of grain size on extraction. The mobility trend in both tailings and soil followed the order Ni > Zn > Cu. Metals of lithogenic origin (Cr and Pb) were less extracted in the water soluble fraction or non-residual fractions than those associated with mining. The acid leachable fraction was high in the tailings due to the presence of sulphide minerals. Hence, acidification of tailings would enhance leaching of metals. Results of single and sequential chemical extraction indicate that the Cu, Zn, and Ni are anthropogenic, as they were mostly associated with the non-residual fraction of the soil.

Keywords

Single reagent extraction Sequential chemical fractionation Major oxides Khetri copper mine 

Mobilität und Verhalten von Metallen in Abraumhalden und Böden von Kupferminen in Khetri, Indien

Zusammenfassung

Die Mobilität und das Verhalten von Metallen (Cu, Zn, Ni, Cr und Pb) in Abraumhalden und benachbarten Böden wurden in der Khetri-Kupfermine in Rajasthan (Indien) untersucht. Die Extraktion mit einem einzelnen Reagens diente dazu, die Mobilität und Verfügbarkeit dieser Metalle zu bewerten, während sequenzielle chemische Fraktionierung (wasserlöslich, sauer und reduzierbar) zur Bewertung ihres Verhaltens in der Umwelt eingesetzt wurde. Die Proben wurden in zwei verschiedene physikalische Korngrößenfraktionen unterteilt, um den Einfluss der Korngröße auf die Extraktion zu ermitteln. Der Mobilitätstrend in beiden Abraumhalden und im Boden folgte der Reihenfolge Ni > Zn > Cu. Metalle mit lithogenem Ursprung (Cr und Pb) wurden in der wasserlöslichen Fraktion und in rückstandslosen Fraktionen weniger extrahiert als die mit Bergbau in Verbindung stehenden Metalle. Aufgrund der Anwesenheit von Sulfidmineralien war die mit Säure extrahierbare Fraktion in den Abraumhalden hoch. Somit würde eine Ansäuerung der abgelagerten Rückstände die Auslaugung der Metalle verbessern. Die Ergebnisse der singulären Extraktionen und der sequenziellen chemischen Extraktion zeigen, dass Cu, Zn und Ni anthropogenen Ursprungs waren, da sie meist mit der rückstandslosen Bodenfraktion assoziiert waren.

Movilidad y comportamiento de los metales en los relaves y en el suelo de la mina de cobre en Khetri, India

Resumen

Se estudió la movilidad y el comportamiento de metales (Cu, Zn, Ni, Cr y Pb) en relaves mineros y suelos vecinos en la región minera de cobre Khetri, Rajasthan, India. La extracción de reactivo único se utilizó para evaluar la movilidad y la disponibilidad de metales, mientras que el fraccionamiento químico secuencial (soluble en agua, ácido y reducible) se utilizó para evaluar su comportamiento en el medio ambiente. Las muestras se dividieron en dos fracciones de tamaño de grano diferentes para evaluar el impacto del tamaño de grano en la extracción. La tendencia de la movilidad en relaves y suelo siguió el orden Ni> Zn> Cu. Los metales de origen litogénico (Cr y Pb) se extrajeron menos en la fracción soluble en agua o o en fracciones no residuales que los asociados con la extracción. La fracción lixiviable por ácido fue alta en los relaves debido a la presencia de sulfuros. Por lo tanto, la acidificación de los relaves mejoraría la lixiviación de los metales. Los resultados de extracción química única y secuencial indican que Cu, Zn y Ni fueron de origen antropogénico ya que se asociaron principalmente con la fracción no residual del suelo.

印度Khetri铜矿尾矿和土壤的金属活性和行为特征

抽象

研究了印度拉贾斯坦邦Khetri地区铜矿尾矿及附近土壤的金属(铜、锌、 镍、铬、和铅)活性和行为特征。单试剂提取用以评价金属活性和生物可获取性,顺序化学分离(水溶态、酸溶态和残渣态)用以评价金属环境行为特征。样品按粒径分成两部分以评价粒径对提取的影响。尾矿和土壤中金属活性顺序为镍>锌>铜。岩石成因金属(铬和铅)的水溶态和非残渣态比采矿成因更少。硫化物使尾矿的酸溶态更高。尾矿酸化将使更多金属滤出。单试剂提取与顺次化学分离结果表明铜、锌和镍属人类成因,多为土壤非残渣态。

Notes

Acknowledgements

We thank the Dean of the School of Environmental Sciences, Jawaharlal Nehru University for encouragement and DST (Purse-Phase-II) & UGC (UPE-II) for financial support. AP acknowledges the University Grant Commission for her Junior Research Fellowship.

Supplementary material

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Supplementary material 1 (DOCX 729 KB)
10230_2018_582_MOESM2_ESM.docx (10 kb)
Supplementary material 2 (DOCX 10 KB)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of Environmental SciencesJawaharlal Nehru UniversityNew DelhiIndia

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