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Characteristics of Sediment Heavy Metal Levels in Lead-zinc Ore Cho Don District Area, Bac Kan Province, Vietnam
Lithology and Mineral Resources ( IF 0.7 ) Pub Date : 2021-05-24 , DOI: 10.1134/s0024490221030020
Nguyen Van Hoang , R. B. Shakirov , Trinh Hoai Thu , N. S. Syrbu , A. I. Eskova

Abstract

Vietnam is a country with diverse and abundant mineral resources with nearly 5000 mines and ore spots of about 60 different minerals. Mining and processing of mineral resources have contributed about 9.6–10.6% of the country’s GDP since the year of 2000. However, the exploitation and processing of mineral resources have been leading to a certain soil and sediment contamination by heavy metals. Soil and sediment samples around lead-zince mines have been collected and analyzed for Cu, Zn, As, Cd, Hg, Pb and Ni in Cho Don district, Bac Kan province, Vietnam. Single pollution, geoaccumulation and enrichment indices have been used for assessing the sediment quality in terms of heavy metals by comparison with threshold and ecological risk limits. High concentration of Cu and Zn in the sediment is due to extremely high content of the two metals in the ore-surrounding soil in the lead-zinc mines, i.e. high background values. High concentration of As and Cd in the sediment is affected in a greater extent by high content of the two metals in the ore-surrounding soil in the lead-zinc mines, and in a lesser extent by contamination due to geoaccumulation and enrichment. High Pb concentration in sediment is affected in a greater extent by high content of the metal in the ore-surrounding soil in the lead-zinc mines, and in a lesser extent by contamination due to geoaccumulation and enrichment. The pollution sequence based on an average single pollution index is Pb(125.76) > As(55.48) > Zn(26.82 > Cd(14.17) > Cu(5.08) > Ni(1.36) > Hg(0.42), while based on the average geoaccumulation index, the sediment is mostly uncontaminated with the sequence Cd(1.1) > As(0.7) > Cu, Zn, Hg, Pb, Ni(<0). However, a significant to an extremely enrichment of some metals is observed with the following sequence based on the average enrichment factor Cd(4.8) = As(4.8) > Hg(4.1) > Pb(1.4) > Cu(0.9) > Ni(0.6). The results highlight the need for a comprehensive and detailed study program on heavy metal content in different soil and sediment resources to identify the magnitude and details of the problem associated with heavy metal contamination for development of a remediation plan and more effective pollution preventing measures including technology develop for recovering of useful components.



中文翻译:

越南北关省铅锌矿Cho Don地区的沉积物重金属含量特征

摘要

越南是一个拥有丰富多样矿产资源的国家,拥有近5000座矿山和约60种不同矿产的矿点。自2000年以来,矿产资源的开采和加工已占该国GDP的9.6–10.6%。但是,矿产资源的开采和加工已导致一定的土壤和沉积物被重金属污染。在越南巴坎省Cho Don地区,铅铅矿周围的土壤和沉积物样本已经收集并进行了铜,锌,砷,镉,汞,铅和镍的分析。通过与阈值和生态风险限值进行比较,已使用单一污染,地质累积和富集指数来评估重金属方面的沉积物质量。沉积物中铜和锌的高浓度归因于铅锌矿山矿石周围土壤中两种金属的含量极高,即较高的背景值。铅锌矿中矿石周围土壤中两种金属的含量较高,对沉积物中高浓度的砷和镉的影响较大,而地质积累和富集造成的污染则较小。铅锌矿山矿石中土壤中金属的含量较高,对沉积物中高浓度的Pb的影响较大,而地质积累和富集造成的污染则较小。基于平均单一污染指数的污染顺序为Pb(125.76)> As(55.48)> Zn(26.82> Cd(14.17)> Cu(5.08)> Ni(1.36)> Hg(0.42),而根据平均地质累积指数,沉积物大部分不受污染,其排列顺序为Cd(1.1)> As(0.7)> Cu,Zn,Hg,Pb,Ni(<0)。但是,根据平均富集系数Cd(4.8)= As(4.8)> Hg(4.1)> Pb(1.4)> Cu(0.9)> Ni( 0.6)。结果表明,需要针对不同土壤和沉积物资源中的重金属含量制定全面而详细的研究计划,以识别与重金属污染有关的问题的严重程度和细节,以制定补救计划和更有效的污染预防措施,包括技术开发用于回收有用成分的工具。Zn,Hg,Pb,Ni(<0)。但是,根据平均富集系数Cd(4.8)= As(4.8)> Hg(4.1)> Pb(1.4)> Cu(0.9)> Ni( 0.6)。结果表明,需要针对不同土壤和沉积物资源中的重金属含量制定全面而详细的研究计划,以识别与重金属污染有关的问题的严重程度和细节,以制定补救计划和更有效的污染预防措施,包括技术开发用于回收有用成分的工具。Zn,Hg,Pb,Ni(<0)。但是,根据平均富集系数Cd(4.8)= As(4.8)> Hg(4.1)> Pb(1.4)> Cu(0.9)> Ni( 0.6)。结果表明,需要针对不同土壤和沉积物资源中的重金属含量制定全面而详细的研究计划,以识别与重金属污染有关的问题的严重程度和细节,以制定补救计划和更有效的污染预防措施,包括技术开发用于回收有用成分的工具。Ni(0.6)。结果表明,需要针对不同土壤和沉积物资源中的重金属含量制定全面而详细的研究计划,以识别与重金属污染有关的问题的严重程度和细节,以制定补救计划和更有效的污染预防措施,包括技术开发用于回收有用成分的工具。Ni(0.6)。结果表明,需要针对不同土壤和沉积物资源中的重金属含量制定全面而详细的研究计划,以识别与重金属污染有关的问题的严重程度和细节,以制定补救计划和更有效的污染预防措施,包括技术开发用于回收有用成分的工具。

更新日期:2021-05-25
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