List of Articles Index of Geoaccumulation

• Open Access Article
  • Abstract Page
  • Full-Text
  
  1 - An Environmental Evaluation of Heavy Metals’ Soil Contamination of Shourab Region (South Kashmar – Khorasan Razavi)
  nafisa Ebrahimi Kargarshirazy Saeed Saadat mohamamd javanbakht
  10.22034/jest.2020.35224.4236
  Background and Objective: The purpose of this research is to investigate the distribution of heavy metals and evaluating geo-accumulation and contamination factors on these elements in the stream sediments of Shourab Kashmar area. There are indications of some elements More

  Background and Objective: The purpose of this research is to investigate the distribution of heavy metals and evaluating geo-accumulation and contamination factors on these elements in the stream sediments of Shourab Kashmar area. There are indications of some elements such as Mercury, Lead, Iron, and Copper that might be the cause for environmental pollution in this area. Method: After processing of satellite images and performing geological studies, 21 samples of stream sediments were gathered. By determining the salinity, pH, and EC parameters as well as the soil texture of samples, 14 samples were tested in order to study the concentration of heavy metals with the ICP-OS systems in the ZarAzma Laboratory. The collected results were processed and studied using GIS, SPSS, and Excel software. Findings: With the exception of the Silver, Copper, Cadmium, Cobalt, Chromium, and Nickel elements which show some level of contamination, there is no evidence of environmental pollution, in the stream sediments in this area. The amount of pH from 7.5 to 8.2 and EC from 0.3 µs/cm to 5 µs/cm and salinity from 150 to 2500 are varying. Discussion and Conclusion: There is a similarity between the distribution of the Nickel, Cobalt, and to some degrees, Chromium in the stream sediments of the study area. This can be related to the volcanic rocks which are mainly intermediate in composition. The Lead and Zinc are mainly concentrated on the north and some towards east of the area, and the Arsenic and Antimony elements in the north and north-west of the study area. The origin of these elements could be connected to mineralization in this area, which has not been focused on so far. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  2 - Geochemical and Environmental Assessment of the Heavy Metals in Robat Sefid Rigion (south of mashhad) Soil
  Mohammad Ebrahim Fazel Valipour Banafshe Fazelvalipoor Rahim Dabiri
  Robat sefid region located in mashhad to torbat road and surrounded with ophiolite outcrop serpentine formation that could be mentioned as source of Lithogenic contamination.   Considering importance of this matter, in this paper heavy metal studying and evalu More

  Robat sefid region located in mashhad to torbat road and surrounded with ophiolite outcrop serpentine formation that could be mentioned as source of Lithogenic contamination.   Considering importance of this matter, in this paper heavy metal studying and evaluation have been done in soil sources of robat sefid region. So heavy metal density in 11 soil samples have been studied and interoperated. For this aim multivariate statistical methods and index of geoaccumulation, enrichment factor, contamination factor and modified degree of contamination have been used. Correlations between elements have been evaluated with multivariate statistical methods (Pearson Correlation, Cluster Analysis and principle component analysis). Based on evaluations, ophiolite rocks (Serpentine، Gabbro، Dunite and Harzburgite) has been considered as Lithogenic source of elements in region. Based on index of geoaccumulation measurement for soil, Nicole has the highest rate of contamination in this region. Enrichment factor calculation shows that Nicole and Chromo have very high contamination and Cobalt has high contamination in this region. Also contamination factor measurement shows severe enrichment of Nicole in this region but region geology structures and ophiolite rocks weathering are the entrance source of these heavy metals and have Lithogenic source. Manuscript profile