نتایج جستجو برای: ancient gold mining activities
تعداد نتایج: 575299 فیلتر نتایج به سال:
The invertebrate populations of stony desert sites contaminated by ancient metalliferous activities in the Nabatean, Roman and Byzantine periods were significantly different from those found in adjacent ancient abandoned field systems. Consequently, it is apparent that such invertebrates potentially have uses as biomonitors of metalliferous pollution derived from ancient anthropogenic activitie...
the quality of hg contaminated sediments in artisanal gold mining areas of tanzania have to date only been assessed through bulk chemical analysis. however, measurement of contaminant levels alone has a limited ability to predict adverse effects on living resources. in this study we investigated the possible effects of hg contaminated sediments from the river mabubi which drains the artisanal g...
INTRODUCTION Small-scale gold miners in Ghana have been using mercury to amalgamate gold for many years. Mercury is toxic even at low concentration. We assessed occupational exposure of small-scale gold miners to mercury in Prestea, a gold mining town in Ghana. METHODS We conducted a cross-sectional study in which we collected morning urine samples from 343 small-scale gold miners and tested ...
In artisanal gold mining practiced in North Sulawesi Island, Indonesia, gold is separated from ore by the use of mercury, which forms an amalgam with gold. All related processes are undertaken with a low level of technical knowledge and skills, no regulation, and with disregard for the safety of human and environment health. The situation is generating serious potential health and environmental...
Since 2005, the mining sector has been a vital part of Mongolia's economy. This is one most important sources revenue. Primary outputs industry are copper, gold, and coal. On other hand, negative impact on environment causing soil erosion, noise pollution, water biodiversity loss. The Oyu Tolgoi copper mine located in semi-arid zone Mongolian Gobi. was investigated by sampling eight plots both ...
detail exactly how sparse medical care was in Scotland. Even if it were available, the authors show that the stringency of the Scottish Poor Law may have denied access to it. One of their tables (9.B) "shows how much was actually spent on doctors per head of the population on the poor roll. The Scottish average was £0.0 154, or no more than 3.d per pauper per year in the old money" (p. 217). Th...
Background: Gold mining activities, both legal or illegal, as well public activities that live around Bakan River influenced the quality of water. These produce waste contains heavy metals from gold production and derivative impacts these activities. The then flows into water pollute biota. People use feel impact like health problems. Tilapia (Oreochromis niloticus) is one fish in river often c...
This paper empirically analyzes the location decisions of the worlds major gold mining rms using a data set of political, economic, regulatory, infrastructural and investment risk variables observed for a large number of gold producing countries since 1975. The aim of the study is to determine the signi cance of environmental stringency in forming location decisions while controlling for othe...
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