In order to prevent bias in this study and identify eligible studies, various steps of the study was performed independently by two researchers. Comprehensive and systematic searches were performed in main local databases including SID, Magiran, Iran medex, and ISC as well as internationally available databases including Embase, PubMed and Scopus for all the relevant studies up to 2018. The aim of the present study was to assess the pooled mean mercury level (MML) in the urine, blood, nail, and hair of Iranian dentists (IDs) through the meta-analysis technique. Keywords:Įxposure to mercury is an important risk to dentists health. Potentially toxic elements exist in the plants and soil along Silver Bow Creek and the Upper Clark Fork River. Overall, the Warm Springs (contaminated) location had the highest elemental contents followed by Miles Crossing (restored, suspected groundwater upwelling), Santa (twice restored), and Hay Canyon (control).
In addition, a potential Mn and Fe deficiency below the Warm Springs Settling Ponds could indicate the ponds settle out Mn as well as other metals. Soil contents increased by factors of 4, 12, and 0.2 for Mn, Cu, and Zn respectively aerial plant content increased by factors of 0.2, 3, 7, 0.4, and 3 for Mn, Fe, Cu, Zn, and Pb respectively and root contents increased by factors of 0.2, 58, 10, 0.13, and 9 for Mn, Fe, Cu, Zn, and Pb respectively. Element content increased with increased distance from the bank. The soil showed higher metal contents than the roots, which showed higher concentrations than the areal plants. This study investigated the Mn, Fe, Cu, Zn, As, Cd, and Pb content of aerial plants and roots, as well as surrounding soil, on a transect to 25 meters from the creek bank. Basin wildrye, Leymus cinereus, grows in each of the restored and contaminated areas sampled.
A growing number of studies are investigating native plants’ ability to aid in metal removal after reclamation efforts. The area is now one of the largest superfund complexes in the United States and has been extensively remediated with restoration continuing. Butte, MT has extensive environmental damage due to 120 years of mining, milling, and smelting starting in the late 1800’s with no control or forethought on waste management.
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