— The adsorption performance of gold from the cyanide leaching solution was optimized to obtain the maximum adsorption rate using Design Expert software. Fig. 5 demonstrates the trend of factors for movement towards the optimal point. As considered, changing the parameters toward the optimal point decreased the recovery of zinc.
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— 3D response surface plots showing the effect of two factors on the adsorption rate of gold: (a) pH and the agitation rate; (b) agitation rate and the activated carbon concentration; (c) agitation ...
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— Hydrometallurgical gold recovery processes play a pivotal role in the gold mining industry, contributing to more than 90% of global gold production. Among the array of techniques available, the Merrill–Crowe process, adsorption, ion exchange, and solvent extraction are central in extracting gold from leach solutions. While the Merrill–Crowe …
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— In order to evaluate the batch leaching concentrations obtained in this study, laboratory leaching experiments (batch SSE, batch S4, soil columns and calculated adsorption isotherms) of the embankment soil (B) were compared (Fig. 8) with field data delivered by the suction cup monitoring field at 7.5 and 10 m distance from the road …
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— The effects of salinity, temperature, and UV irradiation on leaching and adsorption of phthalate esters from polyethylene in seawater. Author links open overlay panel Jeyakumar Dhavamani a b ... UV radiation and turbulence on leaching of organic plastic additives from four common plastics — a lab experiment. Mar. Pollut. Bull., 102 …
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— In order to investigate the influence of the ion exchange process on the permeability of rare earth ore bodies in the leaching process, a laboratory-scale comparative experiment with ammonium …
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The Leach-CIP circuit is a system comprised of separate leaching and adsorption tanks. In leaching, ore which has been ground to pulp is placed in agitated tanks with sodium cyanide solution and gold and silver is dissolved into the slurry solution. The leach may require 24 to 72 hours to complete, and after the leach is completed, the leached ...
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— In this study, the leaching of six phthalic acid esters (PAEs) from three common consumer plastics was investigated: low and high density polyethylene (LDPE, HDPE) and recycled polyethylene (RP). The effects of salinity, temperature, and ultraviolet irradiation (UVR) on leaching were investigated. The study of leaching of phthalates in …
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takes place in a series of agitated leach reactors or pachucas. Before leaching the pH of the pulp is normally adjusted to a value of around 9.5–11 to ensure minimum loss of cyanide as hydrogen cyanide. The leaching of gold can be conveniently represented by the Elsener equation: [1] Although air agitated leach tanks were commonly used in
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adsorption and leaching of chlorothalonil in the two soils may be affected by a combination of factors such as soil organic matter content, clay content, cation exchange capacity, and soil pH
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— 1. Introduction. Earth is known as the blue planet or the water planet because of the reality that most of its surface is covered by water, and it is the only planet in the solar system that has this huge quantity of water [1,2].For various authorities and agencies dealing with water problems, the conservation of surface and groundwater …
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— In this work, geotechnical properties of heavy-metal contaminated soil consist of basic properties, strength, leaching, electrical resistivity and microstructural characteristics were investigated. The results showed that the clay content, specific surface area and cation exchange capacity of the soil decreased as heavy-metal concentrations …
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— For the isothermal adsorption tests, the Freundlich model was used to better fit the adsorption characteristics of propaquizafop in different soils, with R2 values between 0.9748 and 0.9885 ...
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DOI: 10.1016/S1003-6326(21)65495-X Corpus ID: 234231742; Leaching behaviors of calcium and magnesium in ion-adsorption rare earth tailings with magnesium sulfate @article{Bo2021LeachingBO, title={Leaching behaviors of calcium and magnesium in ion-adsorption rare earth tailings with magnesium sulfate}, author={Fan Bo and Longsheng …
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Salt-affected soils in Sudan fall under three soils orders: Vertisols, Aridisols and Entisols (USDA, 1999). The system used for assessing the salt-affected soils in Sudan is based …
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— Purpose To evaluate atrazine behavior in an agricultural soil (adsorption–desorption, leaching) and the effects of bioaugmentation with the Arthrobacter sp. strain AAC22, as a soil remediating strategy. Material and methods An agricultural soil with a history of atrazine application was used. Equilibrium batch experiments allowed …
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— DOI: 10.3390/min10100889 Corpus ID: 225136597; Permeability and Adsorption–Desorption Behavior of Rare Earth in Laboratory Leaching Tests @article{Wang2020PermeabilityAA, title={Permeability and Adsorption–Desorption Behavior of Rare Earth in Laboratory Leaching Tests}, author={Xiaojun Wang and Hao …
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Permeability and Adsorption–Desorption Behavior of Rare Earth in Laboratory Leaching Tests Xiaojun Wang 1,2, Hao Wang 1,2, Can Sui 1,2, Lingbo Zhou 1,2, Xiao Feng 1,2,*, Chengguang Huang 1,2, Kui Zhao 1,2, Wen Zhong 1,2 and Kaijian Hu 1,2,* 1 Jiangxi Key Laboratory of Mining Engineering, Jiangxi University of Science and Technology,
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— Worldwide gold recovery on activated carbon grew from zero to almost 70% in twenty years from 1980. The stellar attributes of carbon gold plants led to complacency in the industry in designing and operating these plants. Most CIP and CIL plants are overdesigned and operated sub-optimally. Optimum design criteria and operating …
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— The adsorption performance of gold from the cyanide leaching solution was optimized to obtain the maximum adsorption rate using Design Expert software. Fig. 5 …
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— Advances of Research in Soil Chemistry in Sudan. Mohammed Abdalla Elsheikh 1,2 Elamin Abdelmagid Elamin 2, Abdelkarim Hassan Awadelkarim 2, Yousif El …
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— Adsorption depends on ions (adsorbate) in fluid diffusing to the surface of a solid (adsorbent), where they bond with the solid surface or are held there by weak intermolecular forces [].Adsorption studies pointed most important characteristics which determined adsorbent suitability for practical application: adsorption capacity, selectivity …
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— The leaching process of uranium tailings is a typical water-rock interaction. The release of 226 Ra from uranium tailings depends on the nuclides outside the intrinsic properties of uranium tailings on the one hand, and is influenced by the water medium on the other. In this paper, a uranium tailings repository in southern China was used as a …
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Fields for sampling were identified through a random stratified sampling technique and soil samples were collected from 0-15 cm depth. All the soil samples were placed in sterile amber bottles then placed in a cooler at 4 °C for transport to the laboratory for further use in leaching, adsorption and desorption studies.
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— The samples were prepared after two stages of laboratory comminution, which included crushing and milling. ... Azizi A, Ghaedrahmati R, Gupta V and Agarwal S (2017) Adsorption of gold from cyanide leaching solution onto activated carbon originating from coconut shell—Optimization, kinetics and equilibrium studies, Journal of Industrial …
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— Wang et al. (2023) reported an innovative electric drive mining technology, and laboratory and on-site scaled up experiments showed that the REE leaching performance improved by 2.6 times. Meanwhile, this technology reduces the amount of leaching agent by 80% and impurities by approximately 70%. ... Non-contact bioleaching …
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— Carbon-in-pulp and carbon-in-leach are continuous processes that have been wide used in gold extraction plants. These processes occur in a cascade of larger agitated tanks, and the carbon-in-pulp ...
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— CIL circuit is a process of continuous leaching of gold from ore to liquid and counter-current adsorption of gold from liquid to carbon particles in a series of tanks. …
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Soil salinity is generally measured in laboratory through the analysis of aqueous extracts from disturbed soil samples (EC e), or of saturated soil paste (EC s) (Soil Survey Staff, 2014, Method 4F). Temperature has an effect on EC, because EC increases at approximately 1.9% per centigrade over the range of 15–35°C ( Rhoades et al., 1989 ).
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— 1. Introduction. Over the past few decades, incineration has become a widely prevalent alternative for municipal solid waste management all over the world (Song et al., 2017), due to the energy recovery and reduction in the volume and mass of waste (Narayana, 2009).However the MSWI process produces a considerable amount of fly …
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