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Kamenická B, Kuchtová G. Critical review on electrooxidation and chemical reduction of azo dyes: Economic approach. CHEMOSPHERE 2024; 363:142799. [PMID: 38986779 DOI: 10.1016/j.chemosphere.2024.142799] [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: 05/06/2024] [Revised: 07/01/2024] [Accepted: 07/06/2024] [Indexed: 07/12/2024]
Abstract
Effective degradation technologies have been extensively investigated and used to remove azo dyes from wastewater for decades. However, no review dealing with both electrooxidation and chemical reduction of azo dyes from an economic and, therefore, application-relevant perspective has been found in the current literature. A novelty of this review article consists not only in the brief summarization and comparison of both methods but mainly in the evaluation of their economic side. Based on the literature survey of the last 15 years, the costs of treatment approaches published in individual research articles have been summarized, and the missing data have been calculated. A broad spectrum of advanced electrode materials and catalysts have been developed and tested for the treatment, specifically aiming to enhance the degradation performance. An outline of the global prices of electrode materials, reducing agents, and basic chemicals is involved. All additional costs are described in depth in this review. The advantages and disadvantages of respective methods are discussed. It was revealed that effective and cheap treatment approaches can be found even in advanced degradation methods. Based on the collected data, electrooxidation methods offer, on average, 30 times cheaper treatment of aqueous solutions. Concerning chemical reduction, only ZVI provided high removal of azo dyes at prices <100 $ per kg of azo dye. The factors affecting total prices should also be considered. Therefore, the basic diagram of the decision-making process is proposed. In the conclusion, challenges, future perspectives, and critical findings are described.
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Affiliation(s)
- Barbora Kamenická
- Institute of Environmental and Chemical Engineering, University of Pardubice, Studentská 573, 532 10, Pardubice, Czech Republic
| | - Gabriela Kuchtová
- Institute of Environmental and Chemical Engineering, University of Pardubice, Studentská 573, 532 10, Pardubice, Czech Republic.
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Lee SY, Tan YH, Lau SY, Mubarak NM, Tan YY, Tan IS, Lee YH, Ibrahim ML, Karri RR, Khalid M, Chan YS, Adeoye JB. A state-of-the-art review of metal oxide nanoflowers for wastewater treatment: Dye removal. ENVIRONMENTAL RESEARCH 2024; 259:119448. [PMID: 38942255 DOI: 10.1016/j.envres.2024.119448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 06/06/2024] [Accepted: 06/18/2024] [Indexed: 06/30/2024]
Abstract
Dye wastewater consists of high solids concentrations, heavy metals, minor contaminants, dissolved chemical oxygen demand, and microorganisms. Nanoflowers are nanoparticles that resemble flowers when viewed at a microscopic level. Inorganic metal oxide nanoflowers have been discovered to be a potential source for overcoming this situation. Their flower-like features give them a higher surface area to volume ratio and porosity structure, which can absorb a significant amount of dye. The metal oxide nanoflower synthesized from different synthesis methods is used to compare which one is cost-effective and capable of generating a large scale of nanoflower. This review has demonstrated outstanding dye removal efficiency by applying inorganic nanoflowers to dye removal. Since both adsorption and photocatalytic reactions enhance the dye degradation process, complete dye degradation could be achieved. Meanwhile, the inorganic metal oxide nanoflowers' exemplary reusability characteristics with negligible performance drop further prove that this approach is highly sustainable and may help to save costs. This review has proven the momentum of obtaining high dye removal efficiency in wastewater treatment to conclude that the metal oxide nanoflower study is worth researching.
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Affiliation(s)
- Sing Ying Lee
- Department of Chemical and Energy Engineering, Faculty of Engineering and Science, Curtin University Malaysia, CDT 250, 98009, Miri, Sarawak, Malaysia
| | - Yie Hua Tan
- Petroleum and Chemical Engineering, Faculty of Engineering, Universiti Teknologi Brunei, Gadong, BE1410, Brunei Darussalam.
| | - Sie Yon Lau
- Department of Chemical and Energy Engineering, Faculty of Engineering and Science, Curtin University Malaysia, CDT 250, 98009, Miri, Sarawak, Malaysia
| | - Nabisab Mujawar Mubarak
- Petroleum and Chemical Engineering, Faculty of Engineering, Universiti Teknologi Brunei, Gadong, BE1410, Brunei Darussalam; Department of Chemistry, School of Chemical Engineering and Physical Sciences, Lovely Professional University, Jalandhar, Punjab, India
| | - Yee Yong Tan
- Department of Civil and Construction Engineering, Faculty of Engineering and Science, Curtin University Malaysia, CDT 250, 98009, Miri, Sarawak, Malaysia
| | - Inn Shi Tan
- Department of Chemical and Energy Engineering, Faculty of Engineering and Science, Curtin University Malaysia, CDT 250, 98009, Miri, Sarawak, Malaysia
| | - Yeong Huei Lee
- Department of Civil and Construction Engineering, Faculty of Engineering and Science, Curtin University Malaysia, CDT 250, 98009, Miri, Sarawak, Malaysia
| | - Mohd Lokman Ibrahim
- School of Chemistry and Environment, Faculty of Applied Sciences, Universiti Teknologi MARA, 40450, Shah Alam, Selangor, Malaysia; Centre of Nanomaterials Research, Institute of Sciences, Universiti Teknologi MARA, 40450, Shah Alam, Selangor, Malaysia
| | - Rama Rao Karri
- Petroleum and Chemical Engineering, Faculty of Engineering, Universiti Teknologi Brunei, Gadong, BE1410, Brunei Darussalam
| | - Mohammad Khalid
- Sunway Centre for Electrochemical Energy and Sustainable Technology (SCEEST), School of Engineering and Technology, Sunway University, No. 5, Jalan Universiti, Bandar Sunway, 47500 Selangor Darul Ehsan, Malaysia; Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India; Centre of Research Impact and Outcome, Chitkara University, Punjab, 140401, India
| | - Yen San Chan
- Department of Chemical and Energy Engineering, Faculty of Engineering and Science, Curtin University Malaysia, CDT 250, 98009, Miri, Sarawak, Malaysia
| | - John Busayo Adeoye
- Department of Chemical and Energy Engineering, Faculty of Engineering and Science, Curtin University Malaysia, CDT 250, 98009, Miri, Sarawak, Malaysia
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Nguyen TH, Nguyen DV, Hatamoto M, Takimoto Y, Watari T, Do KU, Yamaguchi T. Harnessing iron materials for enhanced decolorization of azo dye wastewater: A comprehensive review. ENVIRONMENTAL RESEARCH 2024; 258:119418. [PMID: 38897434 DOI: 10.1016/j.envres.2024.119418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 06/10/2024] [Accepted: 06/12/2024] [Indexed: 06/21/2024]
Abstract
Highly colored azo dye-contaminated wastewater poses significant environmental threats and requires effective treatment before discharge. The anaerobic azo dye treatment method is a cost-effective and environmentally friendly solution, while its time-consuming and inefficient processes present substantial challenges for industrial scaling. Thus, the use of iron materials presents a promising alternative. Laboratory studies have demonstrated that systems coupled with iron materials enhance the decolorization efficiency and reduce the processing time. To fully realize the potential of iron materials for anaerobic azo dye treatment, a comprehensive synthesis and evaluation based on individual-related research studies, which have not been conducted to date, are necessary. This review provides, for the first time, an extensive and detailed overview of the utilization of iron materials for azo dye treatment, with a focus on decolorization. It assesses the treatment potential, analyzes the influencing factors and their impacts, and proposes metabolic pathways to enhance anaerobic dye treatment using iron materials. The physicochemical characteristics of iron materials are also discussed to elucidate the mechanisms behind the enhanced bioreduction of azo dyes. This study further addresses the current obstacles and outlines future prospects for industrial-scale application of iron-coupled treatment systems.
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Affiliation(s)
- Thu Huong Nguyen
- Department of Science of Technology Innovation, Nagaoka University of Technology, Niigata, Japan
| | - Duc Viet Nguyen
- Centre for Environmental and Energy Research, Ghent University Global Campus, Incheon, Republic of Korea; Department of Green Chemistry and Technology, Ghent University, Centre for Advanced Process Technology for Urban Resource Recovery (CAPTURE), Ghent, Belgium
| | - Masashi Hatamoto
- Department of Civil and Environmental Engineering, Nagaoka University of Technology, Niigata, Japan
| | - Yuya Takimoto
- Department of Mechanical Engineering, Nagaoka University of Technology, Niigata, Japan
| | - Takahiro Watari
- Department of Civil and Environmental Engineering, Nagaoka University of Technology, Niigata, Japan; School of Chemistry and Life Sciences, Hanoi University of Science and Technology, Hanoi, Viet Nam.
| | - Khac-Uan Do
- School of Environmental Science and Technology, Hanoi University of Science and Technology, Hanoi, Viet Nam
| | - Takashi Yamaguchi
- Department of Science of Technology Innovation, Nagaoka University of Technology, Niigata, Japan; Department of Civil and Environmental Engineering, Nagaoka University of Technology, Niigata, Japan
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Suhag MH, Khatun A, Tateishi I, Furukawa M, Katsumata H, Kaneco S. Purification of aqueous orange II solution through adsorption and visible-light-induced photodegradation using ZnO-modified g-C 3N 4 composites. RSC Adv 2024; 14:17888-17900. [PMID: 38836168 PMCID: PMC11149495 DOI: 10.1039/d4ra01481b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Accepted: 05/27/2024] [Indexed: 06/06/2024] Open
Abstract
Semiconductor-based remediation enables environmentally friendly methods of removing aqueous pollutants. Simply fabricated ZnO modified g-C3N4 composites were utilized as bifunctional adsorptive photocatalysts for orange II removal from aqueous solution through adsorption and photocatalysis processes. The adsorption isotherm data of the g-C3N4 (g-CN) and ZnO modified g-C3N4 (ZCN) composites on orange II solution were better fitted with the Langmuir isotherm compared to the Freundlich isotherm. The maximum adsorption capacity for ZCN-2.5 was slightly higher than that of bare g-CN. According to the adsorption thermodynamics investigation of ZCN-2.5 in orange II solution, the positive values of Gibb's free energy change (ΔG0) suggested a non-spontaneous adsorption process. Furthermore, the negative values of entropy change (ΔS) and enthalpy change (ΔH) indicated the decrement of randomness and exothermic nature during the adsorption process, respectively. The photocatalytic degradation kinetics of g-CN and ZCN composites indicated that the degradation process follows the pseudo-first-order reaction kinetic. The degradation rate of orange II with the ZCN-2.5 composite was 6.67 times higher than that obtained with bare g-CN. Possible adsorption and photocatalytic mechanisms have been proposed.
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Affiliation(s)
- Mahmudul Hassan Suhag
- Department of Applied Chemistry, Graduate School of Engineering, Mie University Tsu Mie 514-8507 Japan
- Department of Chemistry, University of Barishal Barishal 8254 Bangladesh
| | - Aklima Khatun
- Department of Applied Chemistry, Graduate School of Engineering, Mie University Tsu Mie 514-8507 Japan
| | - Ikki Tateishi
- Mie Global Environment Center for Education & Research, Mie University Tsu Mie 514-8507 Japan
| | - Mai Furukawa
- Department of Applied Chemistry, Graduate School of Engineering, Mie University Tsu Mie 514-8507 Japan
| | - Hideyuki Katsumata
- Department of Applied Chemistry, Graduate School of Engineering, Mie University Tsu Mie 514-8507 Japan
| | - Satoshi Kaneco
- Department of Applied Chemistry, Graduate School of Engineering, Mie University Tsu Mie 514-8507 Japan
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5
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Shi Y, Xie Z, Hu C, Lyu L. Resourcelized conversion of livestock manure to porous cage microsphere for eliminating emerging contaminants under peroxymonosulfate trigger. iScience 2023; 26:106139. [PMID: 36879805 PMCID: PMC9984556 DOI: 10.1016/j.isci.2023.106139] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 11/01/2022] [Accepted: 01/31/2023] [Indexed: 02/05/2023] Open
Abstract
Pollution and resource waste caused by the improper disposal of livestock manure, and the threat from the release of emerging contaminants (ECs), are global challenges. Herein, we address the both problems simultaneously by the resourcelized conversion of chicken manure into porous Co@CM cage microspheres (CCM-CMSs) for ECs degradation through the graphitization process and Co-doping modification step. CCM-CMSs exhibit excellent performance for ECs degradation and actual wastewater purification under peroxymonosulfate (PMS) initiation, and show adaptability to complex water environments. The ultra-high activity can maintain after continuous operation over 2160 cycles. The formation of C-O-Co bond bridge structure on the catalyst surface caused an unbalanced electron distribution, which allows PMS to trigger the sustainable electron donation of ECs and electron gain of dissolved oxygen processes, becoming the key to the excellent performance of CCM-CMSs. This process significantly reduces the resource and energy consumption of the catalyst throughout the life cycle of production and application.
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Affiliation(s)
- Yuhao Shi
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Institute of Environmental Research at Greater Bay Area, Guangzhou University, Guangzhou 510006, China
| | - Zhiju Xie
- Institute of Rural Revitalization, Guangzhou University, Guangzhou 510006, China
| | - Chun Hu
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Institute of Environmental Research at Greater Bay Area, Guangzhou University, Guangzhou 510006, China
| | - Lai Lyu
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Institute of Environmental Research at Greater Bay Area, Guangzhou University, Guangzhou 510006, China.,Institute of Rural Revitalization, Guangzhou University, Guangzhou 510006, China
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Singh K, Kaur H, Sharma PK, Singh G, Singh J. ZnO and cobalt decorated ZnO NPs: Synthesis, photocatalysis and antimicrobial applications. CHEMOSPHERE 2023; 313:137322. [PMID: 36427583 DOI: 10.1016/j.chemosphere.2022.137322] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 10/31/2022] [Accepted: 11/17/2022] [Indexed: 06/16/2023]
Abstract
The rapid growth of pollutants, both biological and non-biological, puts environmental systems in jeopardy. In view of this, the current study demonstrates the synthesis of undoped and Cobalt-doped zinc oxide nanoparticles (Co doped ZnO NPs) via co-precipitation method. The confirmation of incorporation of the Co dopant into ZnO NPs was verified through various spectroscopic and microscopic techniques. UV-absorption spectra of cobalt-doped ZnO NPs revealed a red shift with change of absorption spectra from 356 nm to 377 nm as compared to undoped ZnO NPs. XRD studies inferred that the average crystallite size of 0.5% and 1% Co-doped ZnO powder was obtained to be ∼16 nm and 14 nm respectively. A drop in band gap value from 3.48 eV to 3.30 eV provided as substantive evidence of the successful integration of Co2+ ions inside the ZnO matrix. FESEM and HRTEM studies revealed that the obtained ZnO NPs are in narrow size distribution (15-20 nm) with a wurtzite crystal structure. The synthesized ZnO and Co-ZnO NPs showed excellent photocatalytic and antimicrobial potency towards reactive brown dye (RB-1) and two bacterial strains, respectively. 1% Co-doped ZnO demonstrated the maximum photocatalytic activity (∼95%), in contrast to 0.5% Co-doped ZnO and undoped ZnO. Thus, the findings of this work support the developed system has a dual role as the photocatalyst, and antibacterial agent for efficient environmental remediation.
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Affiliation(s)
- Karanpal Singh
- Department of Electronics Engineering, Sri Guru Granth Sahib World University, Fatehgarh Sahib, 140406, Punjab, India
| | - Harpreet Kaur
- Department of Physics, Sri Guru Granth Sahib World University, Fatehgarh Sahib, 140406, Punjab, India
| | - Pushpender Kumar Sharma
- Amity Institute of Biotechnology, Amity University Rajasthan, Jaipur, 303002, Rajasthan, India
| | - Gurjinder Singh
- Department of Electronics Engineering, Sri Guru Granth Sahib World University, Fatehgarh Sahib, 140406, Punjab, India.
| | - Jagpreet Singh
- Department of Chemical Engineering, University Centre for Research and Development, Chandigarh University, Gharuan Mohali, 140413, Punjab, India.
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Qazi UY, Iftikhar R, Ikhlaq A, Riaz I, Jaleel R, Nusrat R, Javaid R. Application of Fe-RGO for the removal of dyes by catalytic ozonation process. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:89485-89497. [PMID: 35852749 DOI: 10.1007/s11356-022-21879-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Accepted: 07/01/2022] [Indexed: 06/15/2023]
Abstract
Due to continuous industrialization, the discharge of hazardous dyes has enormously disrupted the ecosystem causing environmental problems. Due to the stable recalcitrant nature of dyes, advanced catalytic ozonation processes with the latest catalyst are under investigation. Fe-RGO is an effective oxidation catalyst, and the metal loaded platform provides enhanced catalytic performance. This study aims to investigate the effectiveness of Fe-RGO/O3 process for the removal of dyes. In the current research, the application of iron-coated reduced graphene oxide (Fe-RGO) was studied as a catalyst in the heterogeneous catalytic ozonation process to remove dyes. Methylene blue (MB) was selected as a model pollutant. RGO was prepared using the improved Hummers method and was coated with iron (Fe) implying the impregnation method. The FTIR, SEM-EDX, XRD, and BET analyses of RG and Fe-RGO were performed to characterize the catalyst. The effect of various parameters such as pH (3-10), catalyst dose (0.01-0.04 g), and radical scavengers (NaHCO3, NaCl) on removal efficiency was elucidated. The result revealed an excellent catalytic efficiency of Fe-RGO in the ozonation process. At optimum conditions, 96% removal efficiency was achieved in catalytic ozonation at pH 7 with a catalyst dose of 0.02 g and ozone dose 0.5 mg/min, after 10 min. Interestingly, a slight decrease in removal efficiency was observed in the catalytic ozonation process in hydroxyl radical scavengers (NaCl and NaHCO3), which makes the proposed catalyst more applicable in real conditions. Therefore, it is concluded that Fe-RGO can be used as an excellent catalyst for the removal of dyes in real conditions where radical scavengers may be present in a significant amount.
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Affiliation(s)
- Umair Yaqub Qazi
- Department of Chemistry, College of Science, University of Hafr Al Batin, PO Box 1803, Hafr Al Batin, 39524, Kingdom of Saudi Arabia
| | - Rabia Iftikhar
- Institute of Environmental Engineering and Research, University of Engineering and Technology, GT Road, Lahore, 54890, Punjab, Pakistan
| | - Amir Ikhlaq
- Institute of Environmental Engineering and Research, University of Engineering and Technology, GT Road, Lahore, 54890, Punjab, Pakistan.
| | - Ibtsam Riaz
- Institute of Environmental Engineering and Research, University of Engineering and Technology, GT Road, Lahore, 54890, Punjab, Pakistan
| | - Rashid Jaleel
- Department of Physics, University of Engineering and Technology, GT Road, Lahore, 54890, Punjab, Pakistan
- School of Physics and Astronomy, University of Manchester, Manchester, M13 9PL, UK
| | - Rabia Nusrat
- Institute of Environmental Engineering and Research, University of Engineering and Technology, GT Road, Lahore, 54890, Punjab, Pakistan
| | - Rahat Javaid
- Renewable Energy Research Center, Fukushima Renewable Energy Institute, National Institute of Advanced Industrial Science and Technology, AIST, 2-2-9 Machiikedai, Koriyama, Fukushima, 963-0298, Japan.
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Yousaf M, Akram M, Bhatti IA, Ahmad M, Usman M, Khan MU, Sarwar A, Sultan M, Sohoo I. On-Site Application of Solar-Activated Membrane (Cr-Mn-Doped TiO 2@Graphene Oxide) for the Rapid Degradation of Toxic Textile Effluents. MEMBRANES 2022; 12:membranes12121178. [PMID: 36557085 PMCID: PMC9784706 DOI: 10.3390/membranes12121178] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 11/07/2022] [Accepted: 11/16/2022] [Indexed: 05/27/2023]
Abstract
Solar-activated water treatment has become an emerging research field due to its eco-friendly nature and the economic feasibility of green photocatalysis. Herein, we synthesized promising, cost-effective, and ultralong-semiconductor TiO2 nanowires (NW), with the aim to degrade toxic azo dyes. The band gap of TiO2 NW was tuned through transition metals, i.e., chromium (Cr) and manganese (Mn), and narrowed by conjugation with high surface area graphene oxide (GO) sheets. Cr-Mn-doped TiO2 NWs were chemically grafted onto GO nanosheets and polymerized with sodium alginate to form a mesh network with an excellent band gap (2.6 eV), making it most suitable to act as a solar photocatalytic membrane. Cr-Mn-doped TiO2 NW @GO aerogels possess high purity and crystallinity confirmed by Energy Dispersive X-ray spectroscopy and X-ray diffraction pattern. A Cr-Mn-doped TiO2 NW @GO aerogels membrane was tested for the photodegradation of Acid Black 1 (AB 1) dye. The synthesized photocatalytic membrane in the solar photocatalytic reactor at conditions optimized by response surface methodology (statistical model) and upon exposure to solar radiation (within 180 min) degraded 100% (1.44 kg/m3/day) AB 1dye into simpler hydrocarbons, confirmed by the disappearance of dye color and Fourier transform infrared spectroscopy. An 80% reduction in water quality parameters defines Cr-Mn-doped TiO2 NW @GO aerogels as a potential photocatalytic membrane to degrade highly toxic pollutants.
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Affiliation(s)
- Maryam Yousaf
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, China
| | - Mariam Akram
- Department of Chemistry, University of Agriculture Faisalabad, Faisalabad 38040, Pakistan
| | - Ijaz Ahmad Bhatti
- Department of Chemistry, University of Agriculture Faisalabad, Faisalabad 38040, Pakistan
| | - Muhammad Ahmad
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, China
| | - Muhammad Usman
- Institute for Water Resources and Water Supply, School of Civil Engineering, Hamburg University of Technology, Am Schwarzenberg-Campus 1, 21073 Hamburg, Germany
| | - Muhammad Usman Khan
- Department of Energy Systems Engineering, Faculty of Agricultural Engineering and Technology, University of Agriculture Faisalabad, Faisalabad 38000, Pakistan
| | - Abid Sarwar
- Department of Irrigation & Drainage, University of Agriculture Faisalabad, Faisalabad 38000, Pakistan
| | - Muhammad Sultan
- Department of Agricultural Engineering, Bahauddin Zakariya University, Multan 60800, Pakistan
| | - Ihsanullah Sohoo
- Department of Energy and Environment Engineering, Dawood University of Engineering and Technology, New M.A. Jinnah Road, Karachi 74800, Pakistan
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Farha AH, Tony MA, Mansour SA, El Basaty AB. Polyaniline/Multi Walled Carbon Nanotubes-A Promising Photocatalyst Composite for Reactive Blue 4 Oxidation. Polymers (Basel) 2022; 14:polym14183922. [PMID: 36146066 PMCID: PMC9502533 DOI: 10.3390/polym14183922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 08/28/2022] [Accepted: 09/07/2022] [Indexed: 12/03/2022] Open
Abstract
For the photocatalytic removal of the Reactive Blue 4 dye from an aqueous stream, new polyaniline/multi walled carbon nanotube nanocomposites (PANI-MWCNTs) were applied as a promising photocatalyst. The PANI-MWCNT nanocomposites were fabricated by aniline oxidation in the presence of MWCNTs using the typical direct oxidation polymerization route. The morphology, the Fourier transform infrared (FTIR) spectra and the UV-Vis absorbance spectra of the fabricated nanocomposites were studied and the attained data confirmed the good interaction between the MWCNTs and PANI matrix. The PANI-MWCNTs nanocomposites were varied according to the wt%, the MWCNTs, which ranged from 0–10 wt% and the corresponding resultant samples are labeled as P-0, P-3, P-5, P-5, P-7 and P-10, respectively. Such composites showed the high potential for the removal of the Reactive Blue 4 dye containing pollutants from wastewater. The starting concentration of the dye pollutants was halved during the first 5 min of UV illumination. The oxidation technique of Reactive Blue 4 over the prepared nanocomposites were processed in a different way and the highest catalytic activity corresponded to P-7. The process reached the complete dye removal in low concentrations of contaminants. The kinetics of the removal followed the pseudo-second order regime which possesses high correlation coefficients with the k2 in the range of 0.0036–0.1115 L.mg−1.min−1 for the Reactive Blue 4 oxidation. In this regard, the combination of the PANI and MWCNTs showed a superior novel photocatalytic activity in the oxidation of commercial textile dying wastewater, namely Reactive Blue 4. This study is the starting point for future applications on an industrial scale since the successful performances of the PANI-MWCNT on commercial dye oxidation.
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Affiliation(s)
- Ashraf H. Farha
- Department of Physics, College of Science, King Faisal University, Al-Ahsa 31982, Saudi Arabia
- Semiconductors Technology Lab, Physics Department, Faculty of Science, Ain Shams University, Cairo 11566, Egypt
- Correspondence:
| | - Maha A. Tony
- Advanced Materials/Solar Energy and Environmental Sustainability (AMSEES) Laboratory, Faculty of Engineering, Menoufia University, Shebin El-Kom 32511, Egypt
- Basic Engineering Science Department, Faculty of Engineering, Menoufia University, Shebin El-Kom 32511, Egypt
| | - Shehab A. Mansour
- Advanced Materials/Solar Energy and Environmental Sustainability (AMSEES) Laboratory, Faculty of Engineering, Menoufia University, Shebin El-Kom 32511, Egypt
- Basic Engineering Science Department, Faculty of Engineering, Menoufia University, Shebin El-Kom 32511, Egypt
| | - Ahmed B. El Basaty
- Basic Science Department, Faculty of Technology & Education, Helwan University, Saray El Qoupa, El Sawah Street, Cairo 11281, Egypt
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Cardoso RMF, Cardoso IMF, da Silva LP, Esteves da Silva JCG. Copper(II)-Doped Carbon Dots as Catalyst for Ozone Degradation of Textile Dyes. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:1211. [PMID: 35407329 PMCID: PMC9003027 DOI: 10.3390/nano12071211] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 03/29/2022] [Accepted: 04/02/2022] [Indexed: 02/05/2023]
Abstract
A catalytic ozonation advanced oxidation process (AOP) with a copper(II)-doped carbon dot as catalyst, Cu-CD (using L-cysteine and polyethylene glycol (PEG) as precursors and passivation agents), was developed for textile wastewater treatment (T = 25 °C and pH = 7). Four dyes were analyzed—Methyl Orange (MO), Orange II sodium salt (O-II), Reactive Black 5 (RB-5) and Remazol Brilliant Blue R (RBB-R), as well as a real effluent from the dying and printing industry. The Cu-CD, with marked catalytic ozonation properties, was successfully synthesized by one-pot hydrothermal procedure with a size of 4.0 nm, a charge of −3.7 mV and a fluorescent quantum yield of 31%. The discoloration of the aqueous dye solutions followed an apparent first-order kinetics with the following rate constants (kap in min−1): MO, 0.210; O-II, 0.133; RB-5, 0.177; RBB-R, 0.086. In the presence of Cu-CD, the following apparent first-order rate constants were obtained (kapc in min−1) with the corresponding increase in the rate constant without catalyst (%Inc): MO, 1.184 (464%); O-II, 1.002 (653%); RB-5, 0.709 (301%); RBB-R, 0.230 (167%). The presence of sodium chloride (at a concentration of 50 g/L) resulted in a marked increase of the discoloration rate of the dye solution due to generation of other radicals, such as chlorine and chlorine oxide, resulting from the reaction of ozone and chloride. Taking into consideration that the real textile effluent under research has a high carbonate concentration (>356 mg/L), which inhibits ozone decomposition, the discoloration first-order rate constants without and with Cu-CD (kap = 0.0097 min−1 and kapc = 0.012 min−1 (%Inc = 24%), respectively) were relatively small. Apparently, the Cu-CD, the surface of which is covered by a soft and highly hydrated caramelized PEG coating, accelerates the ozone decomposition and dye adsorption, increasing its degradation.
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Affiliation(s)
| | | | | | - Joaquim C. G. Esteves da Silva
- Chemistry Research Unit (CIQUP), Institute of Molecular Sciences (IMS)—DGAOT, Faculty of Sciences of University of Porto (FCUP), Rua do Campo Alegre 697, 4169-007 Porto, Portugal; (R.M.F.C.); (I.M.F.C.); (L.P.d.S.)
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Reuse of Textile Dyeing Wastewater Treated by Electrooxidation. WATER 2022. [DOI: 10.3390/w14071084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Wastewater reuse has been addressed to promote the sustainable water utilization in textile industry. However, conventional technologies are unable to deliver treated wastewater with the quality required for reuse, mainly due to the presence of dyes and high salinity. In this work, the feasibility of electrooxidation, using a boron-doped diamond anode, to provide treated textile dyeing wastewater (TDW) with the quality required for reuse, and with complete recovery of salts, was evaluated. The influence of the applied current density on the quality of treated TDW and on the consecutive reuse in new dyeing baths was studied. The ecotoxicological evaluation of the process towards Daphnia magna was performed. After 10 h of electrooxidation at 60 and 100 mA cm−2, discolorized treated TDW, with chemical oxygen demand below 200 (moderate-quality) and 50 mg L−1 (high-quality), respectively, was obtained. Salt content was unchanged in both treatment conditions, enabling the consecutive reuse without any salt addition. For the two reuse cycles performed, both treated samples led to dyed fabrics in compliance with the most restrictive controls, showing that an effective consecutive reuse can be achieved with a moderate-quality water. Besides the water reuse and complete salts saving, electrooxidation accomplished an ecotoxicity reduction up to 18.6-fold, allowing TDW reuse without severe ecotoxicity accumulation.
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