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2019-7-29 · Heavy metal pollution in agricultural soil has negative impact on crop quality and eventually on human health. A total of 24 top soil samples were collected from paddy field near the Zhangji Coal Mine in Huainan City, Anhui Province. Seven heavy metals (Cu, Zn, As, Cr, Cd, Pb, and Ni) were selected to evaluate the pollution status through total content and chemical …
Due to the use of dirty practices such as open pit mining and cyanide heap leaching, mining companies generate about 20 tons of toxic waste for every 0.333-ounce gold ring. The waste, usually a gray liquid sludge, is laden with deadly …
2014-4-11 · The discharge of acidic mine drainage (AMD), with elevated levels of heavy metals, can contaminate the downstream water, agricultural soils, food crops and biota and pose a health risk to residents near the mining areas, . Heavy metal contamination by mining is a major environmental concern on a global scale, particularly in developing countries.
2018-7-19 · The environmental problems arising due to mining activities are natural land degradation, air and water pollution with heavy metals, organic and inorganic waste, negative impact on terrestrial and ...
2017-5-6 · To develop appropriate measures to prevent soil contamination in abandoned mining areas, an understanding of the spatial variation of the potentially toxic trace elements (PTEs) in the soil is necessary. For the purpose of effective …
Operating mines. Mining and metal production has evolved from being manual, unsafe, dirty and small-scale to being partially- or fully-automated, safer, cleaner and large-scale. Unlike their predecessors, today''s workers are highly trained personnel performing skilled work in accordance with the highest health, safety and environmental standards.
2021-11-24 · Exposure to heavy metals in mining activities is a health issue among miners. This study was carried out at three small-scale gold mining sites situated in Banmauk Township, Myanmar and aims to ...
2004-4-15 · In the fragile Amazon River basin, for example, there are hundreds of artisanal mines where workers pour mercury, cyanide, and other chemicals onto gold-rich areas to extract the metal. Once the ...
2021-9-27 · The Ahafo gold mine, Newmont''s first mine in Ghana, has been implicated in human rights abuses and irresponsible practices since before it began operating in 2006. The mine is located in a farming region northwest of the country''s capital Accra and has caused major displacement and social impacts. In October, 2009, a cyanide spill occurred at the Ahafo mine …
2014-11-15 · Heavy metals enter the surroundings by natural means and through human activities. Various sources of heavy metals include soil erosion, natural weathering of the earth''s crust, mining, industrial effluents, urban runoff, sewage discharge, insect or disease control agents applied to crops, and many others (Morais et al., 2012).
2021-7-9 · This work investigated heavy metal and cyanide pollution in surface soils and edible plants around Yanzhuang gold tailings ponds in the region of Yanzhuang Village in Pinggu District, Beijing. Surface soil samples were collected from 33 sites around gold tailings ponds, and concentrations of seven heavy metals (i.e., Sb, As, Cd, Cu, Pb, Zn, and Hg) and cyanide were …
2017-5-28 · cyanide, cadmium, lead and mercury in water, soil and food crops grown in mining communities [4,7]; while other studies have focused on assessing cancer and non-cancer human health risks to residents of mining communities associated with toxic chemicals via oral and dermal contact with the toxic chemicals in polluted water [7,10–12].
2017-10-26 · Cyanide is among the most harmful substances on Earth and it is harmful to humans and most aquatic life even at low concentrations. Free, total cyanide levels and other physicochemical parameters were determined in fish, cassava, cocoyam, dam and borehole water samples collected from Kenyasi, Ghana. A total of sixteen (16) water samples, five (5) fish …
Results indicated that heavy metal levels were similar to those reported by authors working on agricultural soils from other parts of the Mediterranean region, with the exception of Cu and Pb in some samples. Multivariate analysis (principal component analysis and cluster analysis) was performed to identify a common source for heavy metals.
2021-12-3 · Cyanide is so dangerous that it has been banned in some countries. Sulfuric acid. Sulfuric acid is a toxic chemical used in copper mining. It is also a byproduct of many kinds of mining, mixing with water and heavy metals to form acid mine drainage. Sulfuric acid smells like rotten eggs. Contact with sulfuric acid can cause burns, blindness ...
2016-10-26 · Heavy metal pollution and acid mine drainage is a very important environmental concern where waste materials containing metal-rich sulfides from mining activity have been stored or abandoned . Tailings and rock dumps are associated with the surface impacts which greatly affect surface and ground water quality.
2014-1-15 · Through a systematic literature review of Chinese and English databases, data from 72 Chinese mining areas in 22 provinces were collected for this study. Despite its limitations, this review gives the first description of the overall pollution levels and health risks posed by heavy metals in the soils of various mining areas throughout China.
2020-2-26 · The Xiangjiang River is an important drinking water resource for the Hunan Province of China. It is crucial to ascertain the pollution status, influencing factors, ecological risks, and possible sources of heavy metals in the sediments of the Xiangjiang River. Sediment is both a source and a sink of heavy metals in aquatic ecosystems. In this study, surface sediment was …
2017-12-2 · Barapukuria coal mine which has been operating from 2002 is situated in such a location that is dependent on agriculture. Pollution from Coal mining poses a huge risk to the ecosystem and surrounding soil. So, there could be some impact of the Barapukuria coal mine on the surrounding soil. The main aim of this study is to identify the soil quality of the study area …
Heavy metal pollution in agricultural soil has negative impact on crop quality and eventually on human health. A total of 24 top soil samples were collected from paddy field near the Zhangji Coal Mine in Huainan City, Anhui Province. Seven heavy …
The concentrations of arsenic (As), copper (Cu), cobalt (Co), lead (Pb) and zinc (Zn) in washed leaves and washed and peeled tubers of cassava (Manihot esculenta Crantz, Euphorbiaceae) growing on uncontaminated and contaminated soils of the Zambian Copperbelt mining district have been analyzed.An enrichment index (EI) was used to distinguish between contaminated …
2018-7-11 · ASSESSING THE STRESS OF AGRICULTURAL CROPS ASSOCIATED WITH HEAVY METAL POLLUTION IN MINING AREA USING HIGH RESOLUTION REMOTE SENSING DATA Vaghagn Muradyan, Garegin Tepanosyan*, Shushanik Asmaryan, Nairuhi Maghakyan, Armen Saghatelyan Dr. Vaghagn Muradyan, Center for Ecological-Noosphere …
Assessing the Existing Vegetation Around Abandoned Mining Areas With Potentially Toxic Heavy Metals: The Case of Extremadura Region: 10.4018/978-1-7998-7391-4 002: In abandoned mining areas, heavy metals may exist. Those heavy metals can cause physical consequences and death. Through the use of geographic information
2021-2-21 · certain heavy metals and their impact and biotoxic effects on man. Keywords: Human Health, Heavy Metal, Toxicity, Exposure effects. INTRODUCTION . Metallic elements are intrinsic components of the environment. Their presence is considered unique in the sense that it is difficult to remove them completely from the environment once they enter in it.
The cyanide spill released more than 100,000 cubic meters of liquid and suspended waste that contained cyanide and heavy metals. Most of it, estimated at 50 to 100 tons of CN, reached the local ...
The percentages of available heavy metals in wormwood and seedling rhizosphere soils were significantly higher than those in crop rhizosphere soils. Heavy metals mainly accumulated in the roots of plants tested in this study. The Cu, Cd, and Pb concentrations in wormwood exceeded the limits of these metals in general plants.
2016-2-22 · Mine water can have high concentrations of heavy metals, beneficiation reagents, oils, and total dissolved solids as well as elevated temperatures and altered pH. Mine Water Treatment Since mine water is often acidic, one of the most effective treatment techniques is to raise the pH by adding lime or other suitable basic chemicals.
The results of the enrichment factor (EF) and geo-accumulation index (Igeo) indicated pollution by Mn and Cr in the Blyde, and Cr, Fe, Mn, Ni and Zn in the Steelpoort. Thus, the results showed that there was a greater accumulation of heavy metals in …
2019-7-17 · Egypt faces a rapidly increasing deterioration of its surface water owing to the discharges of contaminated effluents. The present study focuses on assessing the levels of toxic heavy metals and organochlorine pesticides (OCPs) in water, sediments and Phragmites australis of freshwater and marine environments at Rosetta area. Fourteen sites were sampled …
2019-12-9 · Heavy metals are present in the earth''s environment. They are generated from anthropogenic and/or natural activities. Heavy metal pollution of soils and the environment is the result from industrialization, urbanization, and intensified irrigation water (Ali et al. 2019).Heavy metals pollution led to the poor soil health (Abdu, et al., 2017 and Bakshi, et al., 2018), surface …