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Physicochemical factors affecting the wettability of copper mine blasting dust

International Journal of Coal Science & Technology 2021年第2期8卷 265-273页

作者： Longzhe Jin Jianguo Liu Jingzhong Guo Jiaying Wang Tianyang Wang School of Civil and Resource Engineering University of Science and Technology BeijingBeijing 100083China Key Laboratory of High-Efficient Mining and Safety of Metal mines of the Ministry of Education University of Science and Technology BeijingBeijing 100083China mine Emergency Technology Research Center University of Science and Technology BeijingBeijing 100083China College of Safety Engineering North China Institute of Science and TechnologySanhe 101601China

To investigate the factors affecting the wettability of copper mine blasting dust,the primary blasting dust was collected from an open-pit copper mine and separated into hydrophilic blasting dust(HLBD)and hydrophobic blasting dust(HBBD)using water flotation *** physicochemical properties of HLBD and HBBD were measured and compared with each *** properties included particle size distributions(PSDs),micromorphologies,pore structures,mineral components and surface organic carbon functional *** results show that particle size and pore structure of the blasting dust are the main factors affecting its ***,particle size of HBBD is smaller than that of HLBD,and their respiratory dust(less than 10μm)accounts for 61.74 vol%and 53.00 vol%,*** pore structure of HBBD is more developed,and the total pore volume of HBBD is 1.66 times larger than that of *** identical mineral compositions were detected in HLBD and HBBD by X-rays diffraction(XRD);however,the surface organic hydrophobic component of HBBD is slightly larger than that of HLBD,this may be the reason for the poor wettability of *** study is significant to understand the effects of physicochemical properties of copper mine blasting dust on its wettability.

关键词： Blasting dust copper mine Wettability Physicochemical properties

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Adsorption　characteristics　of　copper　in　rivers　contaminated　by　acid　mine　drainage　from　copper　mine

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Journal of Environmental Sciences 1996年第1期8卷 28-37页

作者： Luan Zhaokun Chen Ming Tang Hongxiao(Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China)

In this paper, the partitioning of copper between surfacial sediments and overlaying water in Dawu-Le An River, which was contaminated by acid mine drainage resulted from mining activities,was studied by field investigation and acid dissolution *** adsorption experiments were carried out to study the adsorption of copper on amorphous iron oxyhydroxide and ore tailing *** results showed that it was the binding of copper onto the surface of amorphous Fe/Al oxyhydroxides and ore tailing particles that regulated the concentrations of dissolved Cu at downstream of Dawu River and its inlet into Le An River.A significant part of adsorbed copper was likely to be associated with amorphous Fe/Al oxyhydroxides coated on the surface of ore tailing particles. A simplified surface complexation model can be used to describe the adsorption behavior in the river.

关键词： copper mine adsorption behavior natural waters.

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Respirable Dust and Respirable Crystalline Silica Concentration in Workers of copper mine, Mongolia

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Occupational Diseases and Environmental Medicine 2022年第3期10卷 167-179页

作者： Altansukh Otgonnasan Gantugs Yundendorj Oyu Tsogtbayar Zoljargal Erdenechimeg Tsatsral Ganbold Tergel Namsrai Naransukh Damiran Erdenechimeg Erdenebayar Department of Environmental Health School of Public Health Mongolian National University of Medical Sciences Ulaanbaatar Mongolia Centre for Research on Aging Health and Wellbeing Australian National University Canberra Australia Health and Safety Solution Ltd. Ulaanbaatar Mongolia

Introduction: Prosperity in the mining industry in Mongolia has led to an increase in the number of mining workers, resulting in an increase in occupational exposures and the prevalence of occupational diseases and disabilities. The aim of this study was to assess the personal exposure of workers to respirable dust (RD) and respirable crystalline silica (RCS). Method: A cross-sectional study was conducted at the Erdenet copper Ore Mining and included 581 personal samples of RD and 324 samples of RCS, collected in 2018-2020. Results: The study results revealed that the geometric mean (GM) of RD was 0.35 mg/m3 (95% CI 0.32 - 0.39). The RD concentration in 5.9% (n = 34) of all the samples exceeded the permissible exposure level (PEL) (3 mg/mg3). The GM of RCS was 0.012 mg/m3 (95% CI 0.010 - 0.016). In total, 12.0% (n = 39) of all RCS sample concentrations exceeded the PEL (0.1 mg/m3). Conclusion: Steel smelters, blasters, welders, and maintenance laborers were exposed to RD, while crushers, operators, drilling machinists, and maintenance laborers were exposed to RCS. Therefore, regular monitoring of the work environment, risk-based health examinations for dust-exposed workers, efficient support for dust mitigation, reduction measures at the source, and engineering controls are needed.

关键词： copper mine Dust Exposure Respirable Quartz Silica Cyclone

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