Scholarlink

<p>Heavy metal (HM) contamination due to mining activities has always been a topic of environmental concern. Such mining incidents have become an environmental and ecological threat near Indo Bhutan border districts of West Bengal, India, as rivers originating from neighboring hills are flowing down, carrying mining effluents to this region and contaminating different environmental compartments. Mining effluents of dolomite contain HMs like Cu, Pb, Zn, Al and Fe, which impart negative effects on soil and can affect human health. In this present study, distribution of these HMs in 18 tea gardens and 14 river beds was undertaken. Obtained average values of Pb (59.77&#xa0;mg/kg), Cu (49.25&#xa0;mg/kg) and Zn (89.81&#xa0;mg/kg) were found to exceed than the reported upper continental crust (UCC) values. Calculated average data of different pollution indices like contamination factor (CF), enrichment factor (EF), geo accumulation index (I<sub>geo</sub>) and Nemerow pollution index (NIPI) results exhibited the study area is highly contaminated with Pb, Cu and Zn metals. Biological assessments, including evaluating the high HM tolerance level of isolated microbial consortia from each site, further validated the degree of contamination in the area and the decreasing order of metals in every obtained data was as follows: Pb &gt; Cu &gt; Zn. Through statistical multivariate analysis, the similarity and disparity of each studied site in accordance with the quantity of concerned metals showcased river beds as the most affected biotopes. Further, health risk assessments revealed non-carcinogenic risks for Zn and both non-carcinogenic and carcinogenic risks of Pb in the children. The overall findings of this study highlight the need for continuous monitoring and assessment of the impacts of mining materials on river sediments and tea plantations in order to reduce potential crop loss and health risks to the inhabitants.</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Dolomite Related Heavy Metal Deposition in River Beds and Tea Gardens of Indo-Bhutan Border of West Bengal Vis a Vis Soil Microbial Tolerance and Health Hazards

  • 期刊论文

  • 发表日期：

    2026年6月18日

查看全文
  • Sudeshna Nandi,
  • Sourav Chakraborty,
  • Sarbasree Goswami,
  • Subhra Chakraborti,
  • Malay Bhattacharya

摘要

Heavy metal (HM) contamination due to mining activities has always been a topic of environmental concern. Such mining incidents have become an environmental and ecological threat near Indo Bhutan border districts of West Bengal, India, as rivers originating from neighboring hills are flowing down, carrying mining effluents to this region and contaminating different environmental compartments. Mining effluents of dolomite contain HMs like Cu, Pb, Zn, Al and Fe, which impart negative effects on soil and can affect human health. In this present study, distribution of these HMs in 18 tea gardens and 14 river beds was undertaken. Obtained average values of Pb (59.77 mg/kg), Cu (49.25 mg/kg) and Zn (89.81 mg/kg) were found to exceed than the reported upper continental crust (UCC) values. Calculated average data of different pollution indices like contamination factor (CF), enrichment factor (EF), geo accumulation index (Igeo) and Nemerow pollution index (NIPI) results exhibited the study area is highly contaminated with Pb, Cu and Zn metals. Biological assessments, including evaluating the high HM tolerance level of isolated microbial consortia from each site, further validated the degree of contamination in the area and the decreasing order of metals in every obtained data was as follows: Pb > Cu > Zn. Through statistical multivariate analysis, the similarity and disparity of each studied site in accordance with the quantity of concerned metals showcased river beds as the most affected biotopes. Further, health risk assessments revealed non-carcinogenic risks for Zn and both non-carcinogenic and carcinogenic risks of Pb in the children. The overall findings of this study highlight the need for continuous monitoring and assessment of the impacts of mining materials on river sediments and tea plantations in order to reduce potential crop loss and health risks to the inhabitants.

Graphical Abstract