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Amador-Mendez N, Kochetkov FM, Hernandez R, Neplokh V, Grenier V, Finot S, Valera L, Duraz J, Fominykh N, Parshina EK, Deriabin KV, Islamova RM, Herth E, Bouchoule S, Julien F, Abraham M, Das S, Jacopin G, Krasnikov DV, Nasibulin A, Eymery J, Durand C, Mukhin IS, Tchernycheva M. UV-A Flexible LEDs Based on Core-Shell GaN/AlGaN Quantum Well Microwires. ACS APPLIED MATERIALS & INTERFACES 2024; 16:51000-51009. [PMID: 39258764 DOI: 10.1021/acsami.4c06181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/12/2024]
Abstract
Nanostructured ultraviolet (UV) light sources represent a growing research field in view of their potential applications in wearable optoelectronics or medical treatment devices. In this work, we report the demonstration of the first flexible UV-A light emitting diode (LED) based on AlGaN/GaN core-shell microwires. The device is based on a composite microwire/poly(dimethylsiloxane) (PDMS) membrane with flexible transparent electrodes. The electrode transparency in the UV range is optimized: namely, we demonstrate that single-walled carbon nanotube electrodes provide a stable electrical contact to the membrane with high transparency (70% at 350 nm). The flexible UV-A membrane demonstrating electroluminescence around 345 nm is further applied to excite Zn-Ir-BipyPDMS luminophores: the UV-A LED is combined with the elastic luminophore-containing membrane to produce a visible amber emission from 520 to 650 nm. The obtained results pave the way for flexible inorganic light-emitting diodes to be employed in sensing, detection of fluorescent labels, or light therapy.
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Affiliation(s)
- Nuno Amador-Mendez
- Centre de Nanosciences et de Nanotechnologies (C2N), UMR 9001 CNRS, Univ. Paris-Saclay, 10 Boulevard Thomas Gobert, 91120 Palaiseau, France
| | - Fedor M Kochetkov
- Alferov University, Khlopina, 8/3, 194021 Saint Petersburg, Russia
- Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya, 29, 195251 Saint Petersburg, Russia
| | - Roberto Hernandez
- Centre de Nanosciences et de Nanotechnologies (C2N), UMR 9001 CNRS, Univ. Paris-Saclay, 10 Boulevard Thomas Gobert, 91120 Palaiseau, France
| | - Vladimir Neplokh
- Alferov University, Khlopina, 8/3, 194021 Saint Petersburg, Russia
- Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya, 29, 195251 Saint Petersburg, Russia
| | - Vincent Grenier
- Univ. Grenoble Alpes, CEA, Grenoble INP, IRIG, PHELIQS, NPSC, 38000 Grenoble, France
| | - Sylvain Finot
- Univ. Grenoble Alpes, CNRS, Grenoble INP, Institut Néel, 38000 Grenoble, France
| | - Lucie Valera
- Univ. Grenoble Alpes, CEA, Grenoble INP, IRIG, PHELIQS, NPSC, 38000 Grenoble, France
| | - Jules Duraz
- Centre de Nanosciences et de Nanotechnologies (C2N), UMR 9001 CNRS, Univ. Paris-Saclay, 10 Boulevard Thomas Gobert, 91120 Palaiseau, France
| | - Nikita Fominykh
- International Laboratory of Quantum Optoelectronics, HSE University, St. Petersburg 190008, Russia
| | - Elizaveta K Parshina
- St. Petersburg State University, 7/9 Universitetskaya nab., 199034 Saint Petersburg, Russia
| | - Konstantin V Deriabin
- St. Petersburg State University, 7/9 Universitetskaya nab., 199034 Saint Petersburg, Russia
| | - Regina M Islamova
- St. Petersburg State University, 7/9 Universitetskaya nab., 199034 Saint Petersburg, Russia
| | - Etienne Herth
- Centre de Nanosciences et de Nanotechnologies (C2N), UMR 9001 CNRS, Univ. Paris-Saclay, 10 Boulevard Thomas Gobert, 91120 Palaiseau, France
| | - Sophie Bouchoule
- Centre de Nanosciences et de Nanotechnologies (C2N), UMR 9001 CNRS, Univ. Paris-Saclay, 10 Boulevard Thomas Gobert, 91120 Palaiseau, France
| | - François Julien
- Centre de Nanosciences et de Nanotechnologies (C2N), UMR 9001 CNRS, Univ. Paris-Saclay, 10 Boulevard Thomas Gobert, 91120 Palaiseau, France
| | - Malini Abraham
- Materials Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, Kerala 695019, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Subrata Das
- Materials Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, Kerala 695019, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Gwénolé Jacopin
- Univ. Grenoble Alpes, CNRS, Grenoble INP, Institut Néel, 38000 Grenoble, France
| | | | - Albert Nasibulin
- Kemerovo State University, Krasnaya Str. 6, Kemerovo 650000, Russia
| | - Joël Eymery
- Univ. Grenoble Alpes, CEA, Grenoble INP, IRIG, PHELIQS, NPSC, 38000 Grenoble, France
| | - Christophe Durand
- Univ. Grenoble Alpes, CEA, Grenoble INP, IRIG, PHELIQS, NPSC, 38000 Grenoble, France
| | - Ivan S Mukhin
- Alferov University, Khlopina, 8/3, 194021 Saint Petersburg, Russia
- Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya, 29, 195251 Saint Petersburg, Russia
| | - Maria Tchernycheva
- Centre de Nanosciences et de Nanotechnologies (C2N), UMR 9001 CNRS, Univ. Paris-Saclay, 10 Boulevard Thomas Gobert, 91120 Palaiseau, France
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Devipriya B, Mohanan S, Surenjan A. CFD modelling of an immobilised photocatalytic reactor for phenol degradation. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2023; 88:2121-2135. [PMID: 37906462 PMCID: wst_2023_306 DOI: 10.2166/wst.2023.306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/02/2023]
Abstract
Photocatalysis is an advanced oxidation process, which has been gaining attention as a sustainable technology for tackling pollution. Optimum design, fabrication and scaling up of novel photocatalytic reactors are faced with problems such as fabrication cost and numerous experimental trials for optimisation. Computational fluid dynamics (CFD), a computer simulation technique can ease the process of scaling up photocatalytic reactors. The current study focuses on CFD modelling of a serpentine flow path photocatalytic reactor with curved baffles for phenol degradation. The investigation compared different reactor configurations to finalise the optimum design with maximum removal efficiency. Initially, a simple cuboidal reactor was chosen with an efficiency of 27%. However, with a serpentine flow path being introduced, the reactor displayed an improved efficiency of 42%. The addition of baffles improved flow homogeneity and degradation efficiency. The investigation showed that serpentine flow increased the residence time and fluid mixing, while the curved baffles prevented flow channelisation, which enhanced the degradation efficiency. Efficiencies corresponding to different baffle types and geometry were also compared and the final reactor design chosen was a horizontal curved baffled serpentine flow reactor with a flow rate of 0.3 L/s and improved efficiency of 43.1% for a residence time of 18.44 s.
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Affiliation(s)
- B Devipriya
- Department of Civil Engineering, National Institute of Technology Karnataka, Surathkal, P.O. Srinivasnagar, Mangalore 575025, India E-mail:
| | - Sreelal Mohanan
- Department of Aerospace Engineering, Indian Institute of Technology Madras, Chennai, Tamilnadu 600036, India
| | - Anupama Surenjan
- Department of Civil Engineering, National Institute of Technology Karnataka, Surathkal, P.O. Srinivasnagar, Mangalore 575025, India
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Kuspanov Z, Baglan B, Baimenov A, Issadykov A, Yeleuov M, Daulbayev C. Photocatalysts for a sustainable future: Innovations in large-scale environmental and energy applications. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 885:163914. [PMID: 37149164 DOI: 10.1016/j.scitotenv.2023.163914] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 04/12/2023] [Accepted: 04/29/2023] [Indexed: 05/08/2023]
Abstract
The growing environmental and energy crises have prompted researchers to seek new solutions, including large-scale photocatalytic environmental remediation and the production of solar hydrogen using photocatalytic materials. To achieve this goal, scientists have developed numerous photocatalysts with high efficiency and stability. However, the large-scale application of photocatalytic systems under real-world conditions is still limited. These limitations arise at every step, including the large-scale synthesis and deposition of photocatalyst particles on a solid support, and the development of an optimal design with high mass transfer and efficient photon absorption. The purpose of this article is to provide a detailed description of the primary challenges and potential solutions encountered in scaling up photocatalytic systems for use in large-scale water and air purification and solar hydrogen production. Additionally, based on a review of current pilot developments, we draw conclusions and make comparisons regarding the main operating parameters that affect performance, as well as propose strategies for future research.
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Affiliation(s)
- Zhengisbek Kuspanov
- Satbayev University, 050013 Almaty, Kazakhstan; Institute of Nuclear Physics, 050032 Almaty, Kazakhstan; Joint Institute for Nuclear Research, 141980 Dubna, Russian Federation
| | - Bakbolat Baglan
- Institute of Nuclear Physics, 050032 Almaty, Kazakhstan; Al Farabi Kazakh National University, 050040 Almaty, Kazakhstan
| | - Alzhan Baimenov
- Al Farabi Kazakh National University, 050040 Almaty, Kazakhstan; National Laboratory Astana, Nazarbayev University, 010000 Astana, Kazakhstan
| | - Aidos Issadykov
- Institute of Nuclear Physics, 050032 Almaty, Kazakhstan; National Laboratory Astana, Nazarbayev University, 010000 Astana, Kazakhstan
| | - Mukhtar Yeleuov
- Satbayev University, 050013 Almaty, Kazakhstan; Institute of Nuclear Physics, 050032 Almaty, Kazakhstan
| | - Chingis Daulbayev
- Institute of Nuclear Physics, 050032 Almaty, Kazakhstan; National Laboratory Astana, Nazarbayev University, 010000 Astana, Kazakhstan.
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Deng B, Jiang Y, Gao L, Zhao B. CFD modeling of ethylene degradation in gas-phase photocatalytic reactors. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:24132-24142. [PMID: 36333633 DOI: 10.1007/s11356-022-23737-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Accepted: 10/17/2022] [Indexed: 06/16/2023]
Abstract
Photocatalytic oxidation is a promising technology to degrade volatile organic compounds. The performance of photocatalytic reactors is affected by the hydrodynamics, radiation transfer, mass transfer and reaction kinetics. Baffles may improve the hydrodynamics. The effect of baffles on heterogeneous photocatalytic oxidation of gas-phase ethylene in three annular reactors is simulated using computational fluid dynamics. ANSYS Fluent is used to solve all governing equations. Baffles can improve the uniformity of flow and prolong the residence time. The residence time of the C-type reactor and B-type reactor is 0.5% greater than the unbaffled reactor. Baffles have little effect on the radiation distribution. The concentric arrangement of lamp and the reactor leads to a radial dominance of radiation. The effect of baffles on the diffusion of ethylene is complex. The effective diffusion coefficient at the catalyst surface in the C-type reactor decreases 9.5% and that in the B-type reactor increases 3% with respect to the unbaffled reactor. The outlet ethylene concentration is 4.19 ppmv for the U-type reactor, 3.93 ppmv for the C-type reactor and 3.62 ppmv for the B-type reactor. The optimal performance in the B-type reactor is due to the large diffusion coefficient of ethylene. The arrangement of baffles should enlarge the effective diffusion coefficient at the catalyst surface as far as possible.
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Affiliation(s)
- Baoqing Deng
- Department of Environmental Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, People's Republic of China.
| | - Yuanzhen Jiang
- Department of Environmental Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, People's Republic of China
| | - Lin Gao
- Department of Environmental Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, People's Republic of China
| | - Bensheng Zhao
- Department of Environmental Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, People's Republic of China
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Optimal design of novel honeycomb photocatalytic reactors for numerical analysis of formaldehyde degradation by CFD modeling. RESEARCH ON CHEMICAL INTERMEDIATES 2023. [DOI: 10.1007/s11164-023-04961-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Effect of the Implementation of Static Mixers in a CPC Solar Reactor for the Photocatalytic Degradation of Paracetamol. Top Catal 2022. [DOI: 10.1007/s11244-022-01686-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Effect and mechanism of cyanide degradation and Cu/Zn recovery by photoelectro-catalytic oxidation. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120050] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Pan Y, Zhang Y, Huang Y, Jia Y, Cui H, Wang M. Turning Pore Size of Silica-Based Nano-TiO₂ for Treating Cyanide Wastewater. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 2021; 21:5150-5156. [PMID: 33875100 DOI: 10.1166/jnn.2021.19444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Cyanide wastewater is a very highly toxic substance. In this study, a kind of silicon-based nano-TiO₂ material by turning pore size accurately is prepared to treat cyanide wastewater. The materials are characterized by XRD, TG analysis, N₂ adsorption/desorption test, UVAS analysis and TEM. Results show that adding NaCl to the synthesis of silica supports can change the size of pores. It emerges that pore size can affect the catalytic performance of the material. Catalytic experiments confirm that cyanide has the best catalytic effect when it has a pore size of 16.47 nm. UVAS spectrum demonstrate that the cyanide has been broken down rather than adsorbed onto the material.
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Affiliation(s)
- Yubo Pan
- School of Chemistry and Chemical Engineering, Shandong University of Technology, 255049, Zibo, Shandong, China
| | - Yali Zhang
- School of Chemistry and Chemical Engineering, Shandong University of Technology, 255049, Zibo, Shandong, China
| | - Yaoguo Huang
- School of Chemistry and Chemical Engineering, Shandong University of Technology, 255049, Zibo, Shandong, China
| | - Yun Jia
- School of Chemistry and Chemical Engineering, Shandong University of Technology, 255049, Zibo, Shandong, China
| | - Hongyou Cui
- School of Chemistry and Chemical Engineering, Shandong University of Technology, 255049, Zibo, Shandong, China
| | - Ming Wang
- School of Chemistry and Chemical Engineering, Shandong University of Technology, 255049, Zibo, Shandong, China
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Otálvaro-Marín HL, Machuca-Martínez F. New approach for the dimensionless analysis of a unidirectional flow solar reactor based on Damköhler's number profiles. Heliyon 2021; 7:e06969. [PMID: 34027174 PMCID: PMC8121664 DOI: 10.1016/j.heliyon.2021.e06969] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 03/14/2021] [Accepted: 04/27/2021] [Indexed: 12/22/2022] Open
Abstract
A methodology for the analysis of the behavior of complex reactors based on the construction of profiles of a dimensionless number (Damköhler) for each main chemical species (Dai) was proposed. A 4-chlorophenol mineralization reaction in a heterogeneous solar reactor with suspended TiO2 and addition of H2O2 with tubular geometry and radiation collectors, fluid flow and a recirculation system was selected as a complex model system in order to validate the approach. The dynamic behavior of the reactor in dimensionless variables was modeled as a function of Dai. Where Dai(z,t) is a local property and grouped the optical and surface's properties of the catalyst, catalyst load, radiation intensity, the photon absorption rate, rate of non-photochemical reactions, the H2O2 effect, the reaction rate of different stages like adsorption, attack of radicals, surface reactions, plus design and operation variables like reactor volume and volumetric flow. A coupling of orthogonal collocation and Runge-Kutta methods were used to solve the PDEs and carry out the simulations to the different experimental conditions, resulting in profiles of Dai, Ci, and conversion in function of time and space. The Dai profiles proposed in the new methodology are capable of describing the disturbances in solar reactors, to indicate consumption and generation rates, instantaneous changes of reaction rate, to describe competitive reactions and quenching effects and to determine equilibrium concentrations, all of the above at each time and space. Therefore, this approach is a analysis tool of reactors which complements the concentration profile. This methodology can be extended to other reactive systems, adapting the intrinsic reaction rates.
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Affiliation(s)
- Héctor L Otálvaro-Marín
- Escuela de Ingenieria Química, Universidad del Valle, A.A. 25360, Cali, Colombia.,MADE Group, Food Engineering Program, Universidad de la Amazonia, Florencia, Colombia.,IDEI Group, I+D Educación e Ingeniería, Cali, Colombia
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Kosman J, Monteiro JFHL, Lenart VM, Weinert PL, Tiburtius ERL. UV-Vis LED-assisted photo-Fenton process for mineralization of losartan and hydrochlorothiazide: optimization using desirability function. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:24046-24056. [PMID: 33420690 DOI: 10.1007/s11356-020-12011-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Accepted: 12/08/2020] [Indexed: 06/12/2023]
Abstract
This study presents the results obtained for the optimization of the mineralization of losartan (LOS) and hydrochlorothiazide (HCTZ) using the photo-Fenton process with a UV-Vis LED. Experimental design optimization employing a Doehlert matrix and a global desirability function enabled simultaneous evaluation of multiple responses, with factor fitting providing the best conditions that maximized the mineralization efficiency: Fe2+ at 10 mg L-1 and H2O2 at 100 mg L-1. High rates of mineralization of LOS and HCTZ were obtained, with dissolved organic carbon (DOC); removal of almost 75% after 90 min was observed for both pharmaceuticals. The kinetic model showed that the mineralization followed two regimes in the first minutes, with a fast progression followed by slower activity. The energy consumption calculated for mineralization of LOS and HCTZ at a concentration of 20 mg L-1 using the UV-Vis LED-assisted photo-Fenton process, at 60 min, was 130 kWh m-3. The desirability function provides a useful tool for finding optimal experimental conditions for the treatment of effluents with different characteristics. The UV-Vis LED was shown to be a good light source in the photo-Fenton process.
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Affiliation(s)
- Joslaine Kosman
- Universidade Estadual de Ponta Grossa, Av. General Carlos Cavalcanti, 4748, Uvaranas, Ponta Grossa, PR, 84030-900, Brazil
| | | | - Vinícius Mariani Lenart
- Universidade Tecnológica Federal do Paraná, Av. Monteiro Lobato s/n, Km 04, Ponta Grossa, PR, 84016-210, Brazil
| | - Patrícia Los Weinert
- Universidade Estadual de Ponta Grossa, Av. General Carlos Cavalcanti, 4748, Uvaranas, Ponta Grossa, PR, 84030-900, Brazil
| | - Elaine Regina Lopes Tiburtius
- Universidade Estadual de Ponta Grossa, Av. General Carlos Cavalcanti, 4748, Uvaranas, Ponta Grossa, PR, 84030-900, Brazil.
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The Influence of Photocatalytic Reactors Design and Operating Parameters on the Wastewater Organic Pollutants Removal—A Mini-Review. Catalysts 2021. [DOI: 10.3390/catal11050556] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The organic pollutants removal by conventional methods (adsorption, coagulation, filtration, microorganism and enzymes) showed important limitation due to the reluctance of these molecules. An alternative to this issue is represented by the photocatalytic technology considered as an advanced oxidation process (AOP). The photoreactors design and concepts vary based on the working regime (static or dynamic), photocatalyst morphology (powders or bulk) and volume. This mini-review aims to provide specific guidelines on the correlations between the photoreactor concept characteristics (working regime, volume and flow rate), irradiation scenarios (light spectra, irradiation period and intensity) and the photocatalytic process parameters (photocatalyst materials and dosage, pollutant type and concentration, pollutant removal efficiency and constant rate). The paper considers two main photoreactor geometries (cylindrical and rectangular) and analyses the influence of parameters optimization on the overall photocatalytic efficiency. Based on the systematic evaluation of the input data reported in the scientific papers, several perspectives regarding the photocatalytic reactors’ optimization were included.
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Recent Developments in the Photocatalytic Treatment of Cyanide Wastewater: An Approach to Remediation and Recovery of Metals. Processes (Basel) 2019. [DOI: 10.3390/pr7040225] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
For gold extraction, the most used extraction technique is the Merrill-Crow process, which uses lixiviants as sodium or potassium cyanide for gold leaching at alkaline conditions. The cyanide ion has an affinity not only for gold and silver, but for other metals in the ores, such as Al, Fe, Cu, Ni, Zn, and other toxic metals like Hg, As, Cr, Co, Pb, Sn, and Mn. After the extraction stage, the resulting wastewater is concentrated at alkaline conditions with concentrations up to 1000 ppm of metals. Photocatalysis is an advanced oxidation process (AOP) able to generate a photoreaction in the solid surface of a semiconductor activated by light. Although it is well known that photocatalytic processes can remove metals in solution, there are no compilations about the researches on photocatalytic removal of metals in wastewater with cyanide. Hence, this review comprises the existing applications of photocatalytic processes to remove metal and in some cases recover cyanide from recalcitrant wastewater from gold extraction. The use of this process, in general, requires the addition of several scavengers in order to force the mechanism to a pathway where the electrons can be transferred to the metal-cyanide matrices, or elsewhere the entire metallic cyanocomplex can be degraded by an oxidative pathway.
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