Facile preparation photocatalytically active CuO plate-like nanoparticles from brochantite

Новикова, А. А.; Moiseeva, Daria Yu.; Karyukov, E. V.; Kalinichenko, A. A.

doi:10.1016/j.matlet.2015.12.157

Cited by 21 publications

(9 citation statements)

References 36 publications

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“…Brochantite is obtained by the precipitation process at temperatures ranging from 30°C to 85°C and a maximum pH between 7.5 and 8. Brochantite is synthesized from a mixture of copper sulphate (CuSO 4 ) and a neutralizing agent, such as NaOH, Na 2 CO 3, or CaCO 3 . Posnjatike is a hydrated form of brochantite and is produced by precipitation under different temperature and pH conditions than brochantite …”

Section: Resultsmentioning

confidence: 99%

“…In order to form a precipitate composed only by brochantite, other experimental conditions must be studied. According to Novikova et al, pure brochantite is formed at 60°C, pH 8, 0.5 mol/L of CuSO 4 and 0.5 mol/L of Na 2 CO 3 . In the present work, pH, temperature, and CuSO 4 concentration differ from that suggested by the literature.…”

Section: Resultsmentioning

confidence: 99%

“…The copper precipitate analyses (XRD, EDS, speciation diagram, and precipitate colour) indicated the same product. Novikova et al reported that the green colouration and “flower” form indicate brochantite formation.…”

Section: Resultsmentioning

confidence: 99%

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Copper recovery from nickel laterite with high‐iron content: A continuous process from mining waste

et al. 2019

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The waste product from the hydrometallurgical processing of nickel laterite ores can contain valuable metals, making their recovery economically viable. However, the high‐impurities content, mainly iron, makes the process technically unfeasible. As a result, the separation of metals from the leach solution must be selective. Among the techniques available, the use of chelating resin is advantageous due to its selectivity and low energy consumption. Among the commercial chelating resins available, Dowex XUS 43605 has been shown to be highly selective for copper and can be used with a high impurities content. Although there are studies on the use of Dowex XUS 43605, none have evaluated a high impurities content and modelled a continuous process. For this reason, the aim of this work was to investigate copper recovery by a continuous process. The Dowex XUS 43605 chelating resin with HPPA functional group was used in ion‐exchange experiments. Column experiments were performed in two steps: loading (to recover copper) and elution (to obtain a copper‐rich solution). The removal of iron and the subsequent collection of copper were possible in a precipitation step using CaCO3. The results showed that the solution obtained from elution had a copper concentration that was 10 times higher than in the loading. All of the iron was removed from the elution solution at pH 3.5 with 5% of copper losses. Copper precipitation was possible at pH 5.5. From the results obtained, a proposed flowsheet for recovering copper was suggested.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Copper recovery from nickel laterite with high‐iron content: A continuous process from mining waste

et al. 2019

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“…As seen from the SEM photographs, the synthesized films are homogenous, riftless and dense surface structures. Also film surfaces have occurred from plate-like structures as in [29,30]. The SEM pictures illustrate that the surface morphologies of the films are affected by the content of TX-100.…”

Section: Metallurgical Microscope (Mm) Studiesmentioning

confidence: 98%

Enhancement Physical Performance of Nanostructured CuO Films via Surfactant TX-100

Aydın

Şahin

2018

SDÜ Fen Bil Enst Der

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Abstract:In this study, we informed a systematic approach to obtain CuO films with and without TX-100 surfactant by the SILAR procedure. Morphological, structural and optical features of the CuO films were researched by metallurgical microscope, scanning electron microscopy, X-ray diffraction analysis and ultraviolet-visible spectrophotometry respectively with respect to concentrations of TX-100 agent. Metallurgical and scanning electron microscope photographs displayed that the morphology of the film surface was impressed by surfactant TX-100. X-ray diffraction patterns verified that all CuO films have monoclinic crystal lattice structure with preferential orientations of ( 1 11) and (111) planes. Ultraviolet-visible spectra demonstrated that the optical bandgap and transmittance values of the films were altered with TX-100 content. Nanoyapılı CuO Filmlerin Fiziksel Performansının Surfaktan TX-100 Yoluyla GeliştirilmesiAnahtar Kelimeler Bakır Oksit (CuO), Triton X-100, XRD, Bant AralığıÖzet: Bu çalışmada TX-100 surfaktan içeren ve içermeyen CuO filmler sistematik bir yaklaşım gözeterek SILAR yöntemi yardımıyla elde edilmişlerdir. Elde edilen CuO filmlerinin morfolojik, yapısal ve optik özellikleri, TX-100 konsantrasyonuna bağlı olarak sırasıyla metal mikroskobu, taramalı elektron mikroskobu, X-ışını difraksiyon analizi ve ultraviyole-görünür spektrometresi ile incelendi. Metal ve taramalı elektron mikroskobu fotoğrafları, film yüzey morfolojisinin yüzey aktif madde TX-100 tarafından etkilendiğini ortaya koydu. X-ışını kırınım desenleri, tüm CuO filmlerinin (1 11) ve (111) düzlemlerin tercihli yönelimleriyle monoklinik kristal kafes yapısına sahip olduğunu doğruladı. Ultraviyole -görünür spektrum, filmlerin optik bant boşluğu ve geçirgenlik değerlerinin TX-100 içeriği ile değiştiğini gösterdi.

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“…Para que seja formado um precipitado composto por apenas brochantite, outras condições experimentais devem ser estudadas. Segundo Novikova et al[149], brochantite pura é formada em 60°C, pH 8, concentração de CuSO4 0,5mol/L e Na2CO3 0,5mol/L. Nesse trabalho, o pH, temperatura, bem como a concentração do CuSO4 se diferem do proposto pela literatura.…”

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Recuperação de cobre de uma solução sintática baseada no licor de lixiviação atmosférica do minério limonítico de níquel por troca iônica utilizando a resina quelante Dowex.

Perez¹

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Considering the various applications of copper, it is believed that the demand for copper will increase in the coming years and, consequently, its price. Hence, the mining companies face the challenge of improving the productive processes to supply their future demand. Copper fractions can be found in liquor leaching nickel limonite ore and ion exchange with solid adsorbent is one of the available technologies which promote its recovery and reuse. The present work was aimed at studying the adsorption process of copper ions present in a synthetic liquor based on the atmospheric leaching liquor of the nickel limonite ore through an ion exchange resin system using Dowex XUS43605 chelating resin. The feasibility of the chosen technique was analyzed in relation to the influence of parameters by means of batch and fixed bed tests using a synthetic solution. The contact time, pH, amount of resin and temperature were evaluated. Dowex XUS43605 chelating resin showed to be more selective for copper at pH 1.5, and this pH was defined as the working pH. It has been found that 1g is a sufficient dosage to recover copper from the solution on a laboratory scale considering 50mL of synthetic solution. The increase in temperature did not change the adsorption of the copper by the resin, and it was determined that the working temperature is between 25-35°C. The Langmuir adsorption isotherms model showed a better fit between resin and copper than the Freundlich and Temkin models. The pseudosecond-order describes the sorption process and it indicates that the rate-limiting step is chemisorption. The fixed bed column tests allowed the production of a solution with reduced concentration of Cu 2+ in 93% the loading step. By the elution step with 1mol/L of sulfuric acid (H2SO4), a solution 10 times more concentrated in Cu 2+ was obtained in relation to the synthetic solution. The solution from the elution step followed to the precipitation tests, which allowed the separation of copper from the metal ions by the action of the precipitating agent CaCO3 and the generation of a precipitate composed of three phases: brochantite [Cu4SO4(OH)6], posnjatike [CuSO4(OH)6.H2O] and gypsum (CaSO4.2H2O).

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Facile preparation photocatalytically active CuO plate-like nanoparticles from brochantite

Cited by 21 publications

References 36 publications

Copper recovery from nickel laterite with high‐iron content: A continuous process from mining waste

Copper recovery from nickel laterite with high‐iron content: A continuous process from mining waste

Enhancement Physical Performance of Nanostructured CuO Films via Surfactant TX-100

Recuperação de cobre de uma solução sintática baseada no licor de lixiviação atmosférica do minério limonítico de níquel por troca iônica utilizando a resina quelante Dowex.

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Facile preparation photocatalytically active CuO plate-like nanoparticles from brochantite

Cited by 21 publications

References 36 publications

Copper recovery from nickel laterite with high‐iron content: A continuous process from mining waste

Copper recovery from nickel laterite with high‐iron content: A continuous process from mining waste

Enhancement Physical Performance of Nanostructured CuO Films via Surfactant TX-100

Recuperação de cobre de uma solução sintática baseada no licor de lixiviação atmosférica do minério limoní­tico de níquel por troca iônica utilizando a resina quelante Dowex.

Contact Info

Product

Resources

About

Recuperação de cobre de uma solução sintática baseada no licor de lixiviação atmosférica do minério limonítico de níquel por troca iônica utilizando a resina quelante Dowex.