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Vale said on Thursday it had completed studies for potentially developing a nickel sulfate operation in Quebec, Canada, with annual capacity seen at 25,000 tonnes.
Coal is the world's largest energy source for electricity generation and is mined on 6 continents. Sulfate contamination of surface and ground water from these mining and processing operations is well recognized and commonly monitored as a primary indicator of coal mining impact to surface water and groundwater. However, under …
the sulfate concentration reaches 4000mg/L. Biological sulfate reduction can also be used for much higher sulfate concentrations, but the method is economically more viable with moderate sulfate
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Section snippets Study area. The research region (115°53′ to 118°10′ E, 32°51′ to 35°05′ N) is located in the northern portion of Anhui Province in China, with an area of 20,902 km 2.Located in the Huaibei Plain, the altitude is 20–50 m and the terrain is flat, with an overall trend of inclining from the northwest to the southeast.
Process Development Considering the different gold minerals present alone or combined with the host rock, it will be necessary to discharge the unwanted material in order to increase the concentration of gold in an economically manner. This part treats the strategy of beneficiation as a combination of several processes. Joining together these …
Sulfate-reducing microorganisms play a vital role in the control and treatment of mine waste, generating alkalinity and neutralizing the acidic waste. The …
Reagent Consumption. Removing high mass loads of sulphate from water requires large amounts of reagents. To make gypsum and ettringite, the consumption of …
The application of nanofiltration membranes to remove sulfate and arsenic from wastewaters was investigated. The influence of operating parameters on the rejection and permeate flux was determined.
Copper concentrates are widely used in smelting operations worldwide and typically consist of chalcopyrite (CuFeS2) as the primary mineral, with chalcocite (Cu2S) and bornite (Cu5FeS4) as secondary copper-bearing minerals. However, these concentrates often contain hazardous impurities, such as the fluorine ion, which can …
A common source of sulfate at mining sites is the oxidation of sulfide minerals (e.g., pyrite) in mine tailings and waste rock. At some mining sites, sulfuric acid was or is used during ore processing (e.g., for metal extraction). ... The baseline sulfate concentration is ignored in the analysis since it is much lower compared to …
Sulfate retention was effective at pH below 5, with an efficiency of 79% and 89% for dregs and grits, respectively. Dregs presented the best results for acid drainage remediation, notably with a...
This paper is dedicated to the investigation of the removal efficiency of sulfate from synthetic mining water depending on the applied current, the initial pH and the …
Mining activities are one significant source of anthropogenic sulfate into natural waters, mainly due to the exposure of sulfide mineral ores to weathering. There …
Uranium, a cornerstone for nuclear energy, facilitates a clean and efficient energy conversion. In the era of global clean energy initiatives, uranium resources have emerged as a vital component for achieving sustainability and clean power. To fulfill the escalating demand for clean energy, continual advancements in uranium mining …
The results showed that bioremediation using SRB and IRB increased the pH of copper tailing and permeation time, and reduced ORP and the concentration of …
Time-resolved concentration dynamics of sulfate and acetate (A).White and grey shaded areas represent anoxic (0% air-O 2 saturation) and oxic (50% air-O 2 saturation) conditions, respectively ...
concentration has been reported to cause diarrhea and dehydration in human beings (Backer, 2000). Infants are more prone to the higher sulfate concentration than adults. Hence it has been prescribed that water having sulfate more than 400 mgL-1 should not be used for making infant food.
Efficient waste management practices can utilize waste as a resource for the recovery of valuable metals. Rare-earth metals have significant economic importance and are currently in high demand because of their strategic industrial applications. These metals are critical to the development of advanced devices. However, the supply of critical …
The low oceanic sulfate concentration may have been the result of both voluminous gypsum evaporite deposition in the Early to Middle Permian and further depletion as the ocean became anoxic and pyrite burial increased. The substantial decline in oceanic sulfate concentration may have amplified global warming through promoting …
Paired t Test. We compared our method of sulfate determination to an existing standard turbidimetric method (US EPA 1979) commonly used for sulfate analyses.We used SPSS software to conduct a paired t test to find out if there was any significant difference in between these two methods. The results (Table 1) are based on …
Xi'an Dasen Mining Machinery & Equipment Co., LTD Tel: +86-29-8113 7393 Whatsapp:+86 133 1927 7356 Address: Yongwei Times Center Zone, Yanta District, District, Xi'an, Shaanxi, China Email: [email …
There has been growing concern among the public over the environmental impacts of the copper (Cu) mining and mineral processing industries. As an effective tool enabling interactions of all energy and material flows with the environment, Life Cycle Assessment (LCA) is used in many countries to identify environmental hotspots …
Sulfate-reducing bioreactors, also called biochemical reactors, represent a promising option for passive treatment of mining-influenced water (MIW) based on similar technology to aerobic/anaerobic-constructed wetlands and vertical-flow wetlands. MIW from each mine site has a variety of site-specific properties related to its treatment; …
This study indicated that the primary clarifier and anaerobic digester prominently reduced sulfate concentration through biochemical sulfate reduction and iron–sulfur complexation under anaerobic conditions, from 1247 mg/L in the influent to 6.2~59.8 mg/L in the industrial WWTP and from 46.7 mg/L to 0~0.8 mg/L in the …
1. Introduction. Industrial effluents generated from starch, textile, electrolysis, metallurgy, and mineral mining industries contain high volumes of sulfate (Ao et al. 2020; Hwang and Jho, 2018; Li et al., 2020).Sulfate with high concentration in water can generate the hydrogen sulfide due to inverse vulcanization of sulfate, leading to …
Heavy loadings of sulfate aerosol trigger haze formation and pose great damage to human health in Taiwan Island. Nevertheless, high-resolution spatiotemporal variation of ambient sulfate across Taiwan Island still remained unknown because of the scarce monitoring sites. Thus, we developed a novel ensemble model named extreme …
The sulfate concentration was measured by barium chromate spectrophotometry, and the sulfate reduction rate was further calculated. The sludge …
The high δ 34 S SO4 value of the mining wastewater entering the subsidence zone caused the sulfate concentration and isotopic composition to change, which increased the δ 34 S SO4 value of the water body. Considering that the possibility of sulfate reduction by bacteria (BSR) was small, it is possible that mine drainage was an …
1. Introduction. Sulfate occurs extensively in both natural and anthropogenic water systems. Primary natural sources of sulfate include atmospheric deposition, sulfate mineral dissolution, and sulfide mineral oxidation (e.g., Krouse and Mayer, 1999).Anthropogenic sources include coal mines, power plants, phosphate refineries, and metallurgical …