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Fractionation of heavy metals and assessment of contamination of the sediments of Lake Titicaca

机译：重金属的分馏和喀喀湖沉积物的污染评估

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摘要

Chemical weathering is one of the major geochemical processes that control the mobilization of heavy metals. The present study provides the first report on heavy metal fractionation in sediments (8-156 m) of Lake Titicaca (3,820 m a.s.l.), which is shared by the Republic of Peru and the Plurinational State of Bolivia. Both contents of total Cu, Fe, Ni, Co, Mn, Cd, Pb, and Zn and also the fractionation of these heavy metals associated with four different fractions have been determined following the BCR scheme. The principal component analysis suggests that Co, Ni, and Cd can be attributed to natural sources related to the mineralized geological formations. Moreover, the sources of Cu, Fe, and Mn are effluents and wastes generated from mining activities, while Pb and Zn also suggest that their common source is associated to mining activities. According to the Risk Assessment Code, there is a moderate to high risk related to Zn, Pb, Cd, Mn, Co, and Ni mobilization and/or remobilization from the bottom sediment to the water column. Furthermore, the Geoaccumulation Index and the Enrichment Factor reveal that Zn, Pb, and Cd are enriched in the sediments. The results suggest that the effluents from various traditional mining waste sites in both countries are the main source of heavy metal contamination in the sediments of Lake Titicaca.
机译：化学风化是控制重金属迁移的主要地球化学过程之一。本研究提供了第一个关于喀喀湖（3,820 m.s.l.）的沉积物（8-156 m）中重金属分馏的报告，该报告由秘鲁共和国和多民族玻利维亚国共享。遵循BCR方案已确定了总Cu，Fe，Ni，Co，Mn，Cd，Pb和Zn的含量，以及与四种不同馏分相关的这些重金属的馏分。主成分分析表明，Co，Ni和Cd可以归因于与矿化地质层有关的自然资源。此外，铜，铁和锰的来源是采矿活动产生的废水和废物，而铅和锌也表明它们的共同来源与采矿活动有关。根据《风险评估准则》，从底部沉积物到水柱的动员和/或动员涉及到锌，铅，镉，锰，钴和镍的中度至高风险。此外，地质累积指数和富集因子表明，沉积物中富集了Zn，Pb和Cd。结果表明，两国各种传统采矿废料场产生的废水是喀喀湖沉积物中重金属污染的主要来源。

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  • 来源
    《Environmental Monitoring and Assessment》 |2013年第12期|9979-9994|共16页
  • 作者

    Luis Fernando Caceres Choque; Oswaldo E. Ramos Ramos; Sulema N. Valdez Castro; Rigoberto R. Choque Aspiazu; Rocio G. Choque Mamani; Samuel G. Fernandez Alcazar; Ondra Sracek; Prosun Bhattacharya;

  • 作者单位

    Especialidades Quimicas I + D + I, Division Medioambiente, Av. Chacaltaya 648, 10421 La Paz, Bolivia;

    Especialidades Quimicas I + D + I, Division Medioambiente, Av. Chacaltaya 648, 10421 La Paz, Bolivia,KTH-International Groundwater Arsenic Research Group, Division of Land and Water Resources Engineering, Department of Sustainable Development, Environmental Sciences and Engineering, KTH Royal Institute of Technology, Teknikringen 76, SE-100 44 Stockholm, Sweden;

    Especialidades Quimicas I + D + I, Division Medioambiente, Av. Chacaltaya 648, 10421 La Paz, Bolivia;

    Especialidades Quimicas I + D + I, Division Medioambiente, Av. Chacaltaya 648, 10421 La Paz, Bolivia;

    Laboratorio de Quimica Ambiental, Centro de Investigaciones Nucleares (CIN), Viacha, Institute Boliviano de Ciencia y Tecnologia Nuclear, IBTEN, La Paz, Bolivia;

    Laboratorio de Quimica Ambiental, Centro de Investigaciones Nucleares (CIN), Viacha, Institute Boliviano de Ciencia y Tecnologia Nuclear, IBTEN, La Paz, Bolivia;

    Department of Geology, Faculty of Science, Palacky University, 17. Listopadu 12, 771 46 Olomouc, Czech Republic;

    KTH-International Groundwater Arsenic Research Group, Division of Land and Water Resources Engineering, Department of Sustainable Development, Environmental Sciences and Engineering, KTH Royal Institute of Technology, Teknikringen 76, SE-100 44 Stockholm, Sweden;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Enrichment factor; Heavy metals; Lake Titicaca; Sediments; Sequential extraction; Risk Assessment Code;

    机译：富集因子;重金属;的喀喀湖;沉积物;顺序提取;风险评估守则;

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