ارتباط با ما
با ما تماس بگیرید
0086-21-58386256
0086-21-58386256
Arsenic contamination in industrial and mining effluents has always been a serious concern. Recently, nano-sized iron particles have been proven effective in sorptive removal of arsenic, because of their unique …
Introduction. Arsenic (33 As) is a metalloid contained at an average concentration of 1.5 ppm in the Earth's crust, consisting of the 53rd most abundant element, which is also contained in more than 300 mineral species [1,2]bustion of fossil fuels, pesticides, wood preservatives, chemical industry, and mining-metallurgical industries comprise the most …
DST has also successfully demonstrated its GLASSLOCK arsenic stabilization process at an operating copper smelter in Namibia and is now finalizing the detailed engineering for a GLASSLOCK circuit ...
Mining: Production and Control of Arsenic September 2022 Arsenic is a naturally occurring element found in many rocks and minerals in the earth's crust. It is also classified ... The mining, mineral processing and metallurgical industries support, and strictly follow, state and
In most cases, arsenic is an unfavorable element in metallurgical processes. The mechanism of arsenic removal was investigated through roasting experiments performed on arsenopyrite-bearing iron ore. Thermodynamic calculation of arsenic recovery was carried out by FactSage 7.0 software (Thermfact/CRCT, Montreal, Canada; GTT-Technologies, Ahern, …
Arsenic is a poisonous element found within minerals at many of the world's copper mines. As a consequence of sulphide ore processing, …
Chromium and arsenic are two of the most problematic water pollutants due to their high toxicity and prevalence in various water streams. While adsorption and ion …
The aim of this work is to evaluate the routes and effects of arsenic contamination in environmental compartments (air, water, and soil) and environmental organisms (fish and …
In the extraction of nonferrous metal ores, arsenic enters flue gas, waste water, and waste residue respectively, as oxide or salt. Therefore, if most manufacturers that cannot find suitable arsenic xide treatment methods stockpile a lot of arsenic-containing waste or discharge them in the form of the three wastes (i.e., waste gas, waste water, and industrial …
In natural environments, As mainly comes from mining and metallurgy (Han et al., 2003). Arsenic released from excavated rocks due to natural weathering may contain more As(III) than As(V) (Park et ...
Due to the high-acidic arsenic-containing wastewater pollution greatly threatening human health and ecological safety, a simple and efficient method for reducing arsenic was proposed in this paper to solve this problem. By using potassium borohydride (KBH4) as a reducing agent, the soluble arsenic was converted into the gaseous arsine (AsH3) or solid …
Mining: Production and Control of Arsenic. Arsenic is a naturally occurring element found in many rocks and minerals in the earth's crust. It is also classified as a critical mineral and has important uses in our economy and clean energy …
Arsenic-bearing waste material was for many years used for backfilling workings, ground leveling and road hardening [4,7]. Environmental pollution in those areas was also caused by the emission of ...
Microbial arsenic transformations play essential roles in controlling pollution and ameliorating risk. This study combined high-throughput sequencing and PCR-based approaches targeting both the 16 S rRNA and arsenic functional genes to investigate the temporal and spatial dynamics of the soil microbiomes impacted by high arsenic contamination (9.13 to 911.88 …
Abstract Arsenic is a harmful element that widely exists in various non-ferrous metal minerals including copper. With the depletion of free and low arsenic copper ores, containing arsenic copper ore has become an important mineral resource for copper smelting and processing. In the smelting and extraction of copper minerals, arsenic poses a serious …
DOI: 10.1016/S1875-1121(06)09016-X Corpus ID: 140148438; Arsenic in soils in the areas of former mining and mineral processing in Lower Silesia, southwestern Poland @article{Karczewska2007ArsenicIS, title={Arsenic in soils in the areas of former mining and mineral processing in Lower Silesia, southwestern Poland}, author={Anna Karczewska and …
Mai advises mining companies to consider their processing options at resource development and PEA stages when the increased gold extraction, the generation of dry stack tailings, smaller footprint and the proper handling of arsenic offered by the CLEVR and GlassLock processes can be reflected in the overall mine plan and project cost.
The results of a study on the spatial distribution of arsenic in topsoil (0-5 cm) over the K. Mitrovica region, Kosovo, are reported. The investigated region (300 km(2)) was covered by a sampling grid of 1.4 km × 1.4 km. ... Arsenic in surface soils affected by mining and metallurgical processing in K. Mitrovica region, Kosovo Int J Environ ...
The usage of copper (Cu) ores containing low or no arsenic (As) has reduced, and Cu ores containing high levels of As have emerged as vital mineral resources for Cu extraction and processing. The quality of the Cu ores has decreased from 1.6% to approximately 1.0%. The proportion of As to Cu in 15% of Cu resources currently reaches 1:5. However, during the …
The study of the geochemical behavior of arsenic in mining areas and the microbial remediation of arsenic pollution have great potential and are hot spots for the prevention and remediation of arsenic pollution. ... elucidating the biotoxicity and bioaccumulation process of arsenic with different chemical forms (Song et al., 2020; Cui et al ...
The results of a study on the spatial distribution of arsenic in topsoil (0–5 cm) over the K. Mitrovica region, Kosovo, are reported. The investigated region (300 km2) was covered by a sampling grid of 1.4 km × 1.4 km. In total, 159 soil …
A number of human activities have the potential to increase arsenic concentrations in the air, water, and soil on a local scale. The rate of arsenic release from sulfide minerals can be accelerated by mining activities, which expose the minerals to weathering processes during …
Arsenic poisoning is a global health issue affecting millions of people worldwide through environmental and occupational exposure, as well as intentional suicide and homicide attempts. ... Arsine gas is a non-irritating, …
Introduction. Arsenic (33 As) is a metalloid contained at an average concentration of 1.5 ppm in the Earth's crust, consisting of the 53rd most abundant element, which is also …
Arsenic is one of the most hazardous pollutants for both environment and human health [1, 2], generated from the mining activity for processing of different ores such as lead, zinc, copper, gold, and nickel [3,4,5].Therefore, arsenic should be captured and stabilized by strict control to prevent any destructive effects in the environment [6, 7].As a result of the …
Arsenic minerals in mining environments. Arsenic is widely distributed in the Earth's crust, occurring in trace amounts (average crustal abundance =1.5 mg/kg), predominantly in minerals of igneous and sedimentary rocks and soils (Plant et al. 2005).Some arsenic-bearing minerals, such as arsenides and sulfarsenides, are considered non-toxic because they are …
We provide an overview of arsenic (As) from gold mining spoils, tailings disposal sites, and mining degraded soils and propose sustainable soil remediation options to mitigate mobilization and human health impacts. ... Africa, and Latin America and attributed it to emissions from the mine processing plants. Burning of fossil fuels in s ...
B.S. Terry and M. Sánchez, "Environmentally friendly processing of copper minerals bearing arsenic and/or sulfur by pyrometallurgical route", Proceedings of Copper 95 International Conference, vol. II, ... Journal of the Mining and Metallurgical Institute of Japan, 78, pp. 447–453. Google Scholar
Arsenic is a known human carcinogen associated with . skin, lung, bladder, kidney, and liver cancer. 3. Long-term . exposure to arsenic, even at lower levels, can increase the risk of other types of chronic disease. 4. Arsenic can affect a broad range of organs and systems . including: • Cardiovascular system • Endocrine system • Immune ...
