1
|
Hirpara KS, Patel UD. Quantitative structure-activity relationship(QSAR) models for color and COD removal for some dyes subjected to electrochemical oxidation. ENVIRONMENTAL TECHNOLOGY 2023; 44:2374-2385. [PMID: 35001850 DOI: 10.1080/09593330.2022.2028014] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 01/01/2022] [Indexed: 06/08/2023]
Abstract
Electrochemical oxidation is an efficient method for the destruction of dyes in wastewater streams. The experimental conditions during electrochemical oxidation (EO) and molecular structure of a dye greatly influence the extent of degradation. The extent of degradation for a variety of dyes by EO can be predicted conveniently by the use of Quantitative structure-activity Relationship (QSAR) models. An abundant amount of published data on dye degradation by EO using highly variable experimental conditions lies unutilized to prepare QSAR models. In this study, an effort is made to use published experimental data on EO of aqueous dyes after applying an easy method of normalization, to prepare QSAR models for percent color and COD removal. Normalized color and COD removal were obtained by multiplying the reported removal by volume of reactor and concentration of dye; and divided by total current passed and the time of electrolysis. More than 15 molecular descriptors were computed using Schrodinger-suit 2018-3. The multiple linear regression (MLR) approach was used to develop normalized color and COD removal models. The quantum chemical descriptors: highest occupied molecular orbital energy (HOMO) and lowest unoccupied molecular orbital energy (LUMO), polar surface area (PSA), hydrogen bond donor count (HBD), and number of atoms were found significant. The statistical indices: goodness-of-fit, R2 > 0.75, and internal and external validations, Q2LOOCV and Q2ext, > 0.5, satisfied the criteria for predictive models and indicated that the method of normalization used in this study is adequate. Developed QSAR models are quite simple, interpretable, and transparent.
Collapse
Affiliation(s)
- Katha S Hirpara
- Civil Engineering Department, Faculty of Technology and Engineering, The Maharaja Sayajirao University of Baroda, Vadodara, India
| | - Upendra D Patel
- Civil Engineering Department, Faculty of Technology and Engineering, The Maharaja Sayajirao University of Baroda, Vadodara, India
| |
Collapse
|
2
|
Ma X, Chen Q, Chen J, Liao Y, Cai L, Chen L, Wang N, Zhu Y, Huang Z. Construction and in-situ thermodynamics/kinetics studies on Ag-bridged g-C3N4-{002}/BiOBr-{001} facet Z–scheme heterojunction with crystal plane synergistic effect based on photocalorimetry - spectroscopy technology. J Catal 2022. [DOI: 10.1016/j.jcat.2022.07.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
3
|
Impact of γ-rays Irradiation on Hybrid TiO 2-SiO 2 Sol-Gel Films Doped with RHODAMINE 6G. MATERIALS 2021; 14:ma14195754. [PMID: 34640150 PMCID: PMC8510060 DOI: 10.3390/ma14195754] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 09/24/2021] [Accepted: 09/28/2021] [Indexed: 11/17/2022]
Abstract
In the present paper, we investigate how the optical and structural properties, in particular the observed photoluminescence (PL) of photocurable and organic-inorganic TiO2-SiO2 sol-gel films doped with Rhodamine 6G (R6G) are affected by γ-rays. For this, four luminescent films, firstly polymerized with UV photons (365 nm), were submitted to different accumulated doses of 50 kGy, 200 kGy, 500 kGy and 1 MGy while one sample was kept as a reference and unirradiated. The PL, recorded under excitations at 365 nm, 442 nm and 488 nm clearly evidences that a strong signal peaking at 564 nm is still largely present in the γ-irradiated samples. In addition, M-lines and Fourier-transform infrared (FTIR) spectroscopies are used to quantify the radiation induced refractive index variation and the chemical changes, respectively. Results show that a refractive index decrease of 7 × 10-3 at 633 nm is achieved at a 1 MGy accumulated dose while a photo-induced polymerization occurs, related to the consumption of CH=C, Si-OH and Si-O-CH3 groups to form Ti-O and Si-O bonds. All these results confirm that the host matrix (TiO2-SiO2) and R6G fluorophores successfully withstand the hard γ-ray exposure, opening the way to the use of this material for sensing applications in radiation-rich environments.
Collapse
|
4
|
Qiao Q, Singh S, Lo SL, Jin J, Yu YC, Wang L. Effect of current density and pH on the electrochemically generated active chloro species for the rapid mineralization of p-substituted phenol. CHEMOSPHERE 2021; 275:129848. [PMID: 33662719 DOI: 10.1016/j.chemosphere.2021.129848] [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: 11/10/2020] [Revised: 01/25/2021] [Accepted: 01/31/2021] [Indexed: 06/12/2023]
Abstract
The aim of present study is increasing the degradation and mineralization of 4-chlorophenol (4-CP) during electrochemical oxidation with Ti/RuO2 anodes. Innovatively, the evolution of chlorine-related species and the formations of various inorganic ions were investigated by electrolytic analysis in order to set up whether the formation and consumption of these byproducts associated with either chemical or electrochemical reactions. The effect of operating parameters such as current density, solution pH, treatment time, and electrolyte concentration has been studied. The formation of Cl2, chlorite (ClO2-), and chlorate (ClO3-) were detected by adding the known concentration of Cl- ions at different pH and current densities. Concentration trends of active chloro-species indicate that the degradation of 4-CP and chemical oxygen demand (COD) removal was formed maximum at pH 6 and j of 225.2 Am-2 in presence of 0.0085 M NaCl. Thus, the 4-CP degradation mainly depends on the radicals and active chlorine formation and a mineralization mechanism was proposed based on intermediates byproducts formation such as catechol, hydroquinone, 1, 4-benzoquinone, and organic acids identify by using the GC-MS and HPLC analysis at the optimum treatment condition. Total organic carbon (TOC) at different pH and current density, mass balance analysis of carbon and inorganic species formation were determined at the optimum treatment conditions of 4-CP. The degradation kinetic of 4-CP was followed the pseudo-first order kinetic model during the each parameters optimization. Specific energy consumption and current efficiency were also used to identify the technical feasibility of the process.
Collapse
Affiliation(s)
- Qicheng Qiao
- School of Environment and Biological Engineering, Nantong College of Science and Technology, Nantong City, Jiangsu, 226007, PR China
| | - Seema Singh
- Graduate Institute of Environmental Engineering, National Taiwan University, 71, Chou-Shan Rd., Taipei, 106, Taiwan; Omvati Devi Degree College Bhalaswagaj, Haridwar, Uttarakhand, India.
| | - Shang-Lien Lo
- Graduate Institute of Environmental Engineering, National Taiwan University, 71, Chou-Shan Rd., Taipei, 106, Taiwan; Water Innovation, Low Carbon and Environmental Sustainability Research Center, National Taiwan University, Taipei, 10617, Taiwan.
| | - Jierong Jin
- School of Environment and Biological Engineering, Nantong College of Science and Technology, Nantong City, Jiangsu, 226007, PR China
| | - Yong Chang Yu
- School of Environment and Biological Engineering, Nantong College of Science and Technology, Nantong City, Jiangsu, 226007, PR China
| | - Lizhang Wang
- School of Environment Science and Spatial Informatics, China University of Mining and Technology Xuzhou City, Jiangsu, 221116, PR China
| |
Collapse
|
5
|
Le TTT, Tran DT, Danh TH. Remarkable enhancement of visible light driven photocatalytic performance of TiO2 by simultaneously doping with C, N, and S. Chem Phys 2021. [DOI: 10.1016/j.chemphys.2021.111144] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
|
6
|
Photocatalytic Degradation of Rhodamine B by C and N Codoped TiO2 Nanoparticles under Visible-Light Irradiation. J CHEM-NY 2020. [DOI: 10.1155/2020/4310513] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
C and N codoped TiO2 nanoparticles were synthesized via a solvothermal method. The degradation of Rhodamine B by the photocatalyst C, N-TiO2 was investigated under visible-light irradiation generated by using a 36 W compact fluorescent lamp which is characterized by wavelengths from 400 to 650 nm. The structure and properties of the obtained photocatalyst have been systematically investigated using X-ray diffraction, TEM, UV-Vis, FT-IR, and BET techniques. The experimental results revealed that C, N codoped TiO2 nanoparticles were successfully synthesized, with an average diameter of 9.1 nm. C, N-TiO2 nanoparticles exhibited an energy band gap of 2.90 eV, which were lower than pristine TiO2 (3.34 eV), C-TiO2 (3.2 eV), and N-TiO2 (3.03 eV). The degradation of Rhodamine B by C, N-TiO2 indicated that, under visible-light irradiation, the optimal dose of the photocatalyst was 1.8 g/L, and the removal of Rhodamine B was almost complete after 3 hours of reaction. The photocatalytic degradation of Rhodamine B in the range of 5–100 mg/L showed that the process followed the first-order kinetics according to the Langmuir–Hinshelwood model. The highest apparent rate constant (0.0427 min−1) was obtained when the initial concentration of Rhodamine B was 5 mg/L, whereas the former decreased with the increase in the initial concentration of Rhodamine B. Moreover, C and N codoped TiO2 nanoparticles presented a high potential for recycling, which was characterized by a removal efficiency of more than 86% after three cycles.
Collapse
|
7
|
Rayaroth MP, Aravind UK, Aravindakumar CT. Effect of inorganic ions on the ultrasound initiated degradation and product formation of triphenylmethane dyes. ULTRASONICS SONOCHEMISTRY 2018; 48:482-491. [PMID: 30080575 DOI: 10.1016/j.ultsonch.2018.07.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 06/19/2018] [Accepted: 07/04/2018] [Indexed: 06/08/2023]
Abstract
Triphenylmethane (TPM) dyes are an important category of dyes with a variety of industrial applications and consequently, these are found in the aquatic environment at relatively higher concentrations. Here, we report the degradation of two important TPM dyes (para rosaniline (PRA) and ethyl violet (EV)) in an aqueous medium by ultrasound which is one among the Advanced Oxidation Processes (AOPs). The main objective of this work is to study the effect of various inorganic ions on the degradation and the product formation of TPM dyes from the sonochemical reactions. Using a typical concentration of 10 ppm dyes and an ultrasonic frequency of 350 kHz and power of 60 W, a complete degradation of EV and PRA was observed with a pseudo first order rate constant of 0.2339 min-1 and 0.1956 min-1, respectively. The product analyses using high-resolution mass spectrometry (LC-Q-TOF-MS) revealed the formation of hydroxylated, de-alkylated, and other collapsed conjugated structure destructed products. The evolution of these products in the presence of various inorganic ions (Cl-, SO42-, NO3-, and CO3-) showed that only carbonate ions had a significant impact on the product evolution. The carbonate ions facilitated the formation of conjugated structure destructed product for both the dyes. This is attributed to the reactivity of carbonate radical, which facilitated the formation of carbon-centered radicals. This carbon-centered radical further undergoes reaction to cause the destruction of conjugated structures. This is confirmed by the identification of the corresponding product peaks in the mass spectra. The scavenging effect of carbonate ions was also reflected in the product study where there is a reduction in the formation of most of the hydroxylated products. One of the major inorganic species in any wastewater is carbonate ions and therefore the present result is very relevant to the understanding of oxidation based treatment protocol.
Collapse
Affiliation(s)
- Manoj P Rayaroth
- School of Environmental Sciences, Mahatma Gandhi University, Kottayam, Kerala, India
| | - Usha K Aravind
- Advanced Centre of Environmental Studies and Sustainable Development, Mahatma Gandhi University, Kottayam, Kerala, India
| | - Charuvila T Aravindakumar
- School of Environmental Sciences, Mahatma Gandhi University, Kottayam, Kerala, India; Inter University Instrumentation Centre, Mahatma Gandhi University, Kottayam, Kerala, India.
| |
Collapse
|
8
|
Kenova TA, Kornienko GV, Golubtsova OA, Kornienko VL, Maksimov NG. Electrochemical degradation of Mordant Blue 13 azo dye using boron-doped diamond and dimensionally stable anodes: influence of experimental parameters and water matrix. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:30425-30440. [PMID: 30159847 DOI: 10.1007/s11356-018-2977-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 08/14/2018] [Indexed: 06/08/2023]
Abstract
In this work, the electrooxidation as environmentally clean technology has been studied to the degradation of Mordant Blue 13 azo dye (MB13) using boron-doped diamond (p-Si/BDD) and oxide ruthenium titanium (Ti/Ru0.3Ti0.7O2 (DSA)) anodes in various water matrices: distilled water (DW), hot tap water (HTW), and simulated wastewaters with (SWS) and without surfactant (SW). The influence of experimental parameters, such as current density, initial dye concentration, electrolysis time/specific charge, and pH on the MB13 degradation rate, current efficiency, and energy consumption, has been determined. The enhanced rate of both color and chemical oxygen demand (COD) removal in sulfate aqueous solutions with BDD was observed, which indicates that sulfate (SO4-•) radicals along with •OH ones might be responsible for the degradation process. The MB13 decolorization process obeyed a pseudo-first-order reaction kinetics with the apparent rate constant from 7.36 × 10-2 min-1 to 4.39 × 10-1 min-1 for BDD and from 9.2 × 10-3 min-1 to 2.11 × 10-2 min-1 for DSA depending on the electrolysis conditions. The effect of water matrix on the decolorization and COD removal efficiency has been evaluated. Inorganic ions, mordant salt, and surfactant contained in simulated effluents decelerated the COD decay compared to DW and HTW for the both anodes; meanwhile, they differently affected the discoloration process. A comparison of the specific energy consumption for each electrocatalytic material under different experiment conditions has been made. The BDD electrode was more efficient than the DSA to oxidize the MB13 dye in all kinds of water.
Collapse
Affiliation(s)
- Tatyana A Kenova
- Federal Research Center "Krasnoyarsk Science Center SB RAS", Institute of Chemistry and Chemical Technology SB RAS, Krasnoyarsk, Russia, 660036.
| | - Galina V Kornienko
- Federal Research Center "Krasnoyarsk Science Center SB RAS", Institute of Chemistry and Chemical Technology SB RAS, Krasnoyarsk, Russia, 660036
- M.F. Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, Russia, 660037
| | - Oksana A Golubtsova
- Federal Research Center "Krasnoyarsk Science Center SB RAS", Institute of Chemistry and Chemical Technology SB RAS, Krasnoyarsk, Russia, 660036
- M.F. Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, Russia, 660037
| | - Vasiliy L Kornienko
- Federal Research Center "Krasnoyarsk Science Center SB RAS", Institute of Chemistry and Chemical Technology SB RAS, Krasnoyarsk, Russia, 660036
| | - Nikolay G Maksimov
- Federal Research Center "Krasnoyarsk Science Center SB RAS", Institute of Chemistry and Chemical Technology SB RAS, Krasnoyarsk, Russia, 660036
| |
Collapse
|
9
|
Martín-Yerga D, Pérez-Junquera A, González-García MB, Hernández-Santos D, Fanjul-Bolado P. In Situ Spectroelectrochemical Monitoring of Dye Bleaching after Electrogeneration of Chlorine-Based Species: Application to Chloride Detection. Anal Chem 2018; 90:7442-7449. [DOI: 10.1021/acs.analchem.8b00942] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Daniel Martín-Yerga
- DropSens, Sociedad Limitada, Edificio CEEI, Parque Tecnológico de Asturias, 33428 Llanera, Asturias, Spain
| | - Alejandro Pérez-Junquera
- DropSens, Sociedad Limitada, Edificio CEEI, Parque Tecnológico de Asturias, 33428 Llanera, Asturias, Spain
| | | | - David Hernández-Santos
- DropSens, Sociedad Limitada, Edificio CEEI, Parque Tecnológico de Asturias, 33428 Llanera, Asturias, Spain
| | - Pablo Fanjul-Bolado
- DropSens, Sociedad Limitada, Edificio CEEI, Parque Tecnológico de Asturias, 33428 Llanera, Asturias, Spain
| |
Collapse
|
10
|
Kaur P, Kushwaha JP, Sangal VK. Electrocatalytic oxidative treatment of real textile wastewater in continuous reactor: Degradation pathway and disposability study. JOURNAL OF HAZARDOUS MATERIALS 2018; 346:242-252. [PMID: 29277044 DOI: 10.1016/j.jhazmat.2017.12.044] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Revised: 12/11/2017] [Accepted: 12/14/2017] [Indexed: 06/07/2023]
Abstract
Electrocatalytic treatment of real textile wastewater was investigated in continuous electrochemical reactor using dimensionally stable Ti/RuO2 anode. Effects of various parameters such as: elapsed time, current, pH, retention time on the COD removal, color removal and specific energy consumed were evaluated. Central Composite Design under RSM was used for experimental design, data analysis, optimization, interaction analysis between the various electrochemical parameters and steady state time analysis. GC-MS and UV spectrophotometric analysis of the untreated and treated wastewater were conducted to identify the oxidized and transformed/degraded compounds during the oxidation process, and a suitable degradation mechanism was proposed. Treated wastewater may contain toxic chlorinated compounds due to mediated oxidation by various hydrolyzed chlorine species. Therefore, disposability of treated wastewater was assessed by conducting toxicity bioassay test. The optimal set of operating parameters were found to be elapsed time = 124 min, current = 1.37 A, pH = 5.54 and retention time = 157.6 min to simultaneously achieve COD removal, color removal and specific energy consumed as 86.22%, 94.74% and 0.012 kW h, respectively. GC-MS analysis showed presence of chlorinated compounds in the treated wastewater. The toxicity bioassay test resulted acute toxicity with 100% mortality rate within one minute and one hour exposure with untreated and treated textile wastewater, respectively.
Collapse
Affiliation(s)
- Parminder Kaur
- Department of Chemical Engineering, Thapar Institute of Engineering and Technology (Deemed to be University), Patiala, Punjab, India
| | - Jai Prakash Kushwaha
- Department of Chemical Engineering, Thapar Institute of Engineering and Technology (Deemed to be University), Patiala, Punjab, India.
| | - Vikas Kumar Sangal
- Department of Chemical Engineering, Thapar Institute of Engineering and Technology (Deemed to be University), Patiala, Punjab, India.
| |
Collapse
|
11
|
Zamora-Garcia IR, Alatorre-Ordaz A, Ibanez JG, Torres-Elguera JC, Wrobel K, Gutierrez-Granados S. Efficient degradation of selected polluting dyes using the tetrahydroxoargentate ion, Ag(OH) 4-, in alkaline media. CHEMOSPHERE 2018; 191:400-407. [PMID: 29054080 DOI: 10.1016/j.chemosphere.2017.10.041] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Revised: 10/02/2017] [Accepted: 10/07/2017] [Indexed: 06/07/2023]
Abstract
The use of soluble and highly oxidizing Ag(III) in the form of the tetrahydroxoargentate ion Ag(OH)4- is reported for the oxidation of surrogate organic recalcitrant dyes (i.e., rhodamine 6G (Rh6G) and fluorescein (Fl)). The possible use of Ag(OH)4- for the treatment of these and other refractory compounds is assessed. Such dyes were selected due to their common occurrence, stability, refractory nature, the relatively high toxicity of Rh6G, and their structural similarity to Fl. Several reaction intermediates/products were identified. The results showed that the highly oxidizing tetrahydroxoargentate anion was capable of degrading these recalcitrant dyes. Furthermore, the final degradation products do not represent a higher environmental risk than the original surrogates themselves. In addition, the partial mineralization of the dyes was proven.
Collapse
Affiliation(s)
- Ileana R Zamora-Garcia
- Departamento de Quimica, Unidad Pueblito de Rocha, Campus Guanajuato, Universidad de Guanajuato, Cerro de la Venada s/n, Col. Pueblito de Rocha, CP 36040, Guanajuato, Mexico
| | - Alejandro Alatorre-Ordaz
- Departamento de Quimica, Unidad Pueblito de Rocha, Campus Guanajuato, Universidad de Guanajuato, Cerro de la Venada s/n, Col. Pueblito de Rocha, CP 36040, Guanajuato, Mexico.
| | - Jorge G Ibanez
- Depto. de Ing. y Ciencias Quimicas, Centro Mexicano de Quimica Verde y Microescala, Universidad Iberoamericana-Ciudad de Mexico, Prol. Reforma 880, 01219, Mexico City, Mexico
| | - Julio C Torres-Elguera
- Departamento de Quimica, Unidad Pueblito de Rocha, Campus Guanajuato, Universidad de Guanajuato, Cerro de la Venada s/n, Col. Pueblito de Rocha, CP 36040, Guanajuato, Mexico
| | - Kazimierz Wrobel
- Departamento de Quimica, Unidad Pueblito de Rocha, Campus Guanajuato, Universidad de Guanajuato, Cerro de la Venada s/n, Col. Pueblito de Rocha, CP 36040, Guanajuato, Mexico
| | - Silvia Gutierrez-Granados
- Departamento de Quimica, Unidad Pueblito de Rocha, Campus Guanajuato, Universidad de Guanajuato, Cerro de la Venada s/n, Col. Pueblito de Rocha, CP 36040, Guanajuato, Mexico
| |
Collapse
|
12
|
Asaithambi P, Aziz ARA, Sajjadi B, Daud WMABW. Sono assisted electrocoagulation process for the removal of pollutant from pulp and paper industry effluent. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:5168-5178. [PMID: 27221586 DOI: 10.1007/s11356-016-6909-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Accepted: 05/16/2016] [Indexed: 06/05/2023]
Abstract
In the present work, the efficiency of the sonication, electrocoagulation, and sono-electrocoagulation process for removal of pollutants from the industrial effluent of the pulp and paper industry was compared. The experimental results showed that the sono-electrocoagulation process yielded higher pollutant removal percentage compared to the sonication and electrocoagulation process alone. The effect of the operating parameters in the sono-electrocoagulation process such as electrolyte concentration (1-5 g/L), current density (1-5 A/dm2), effluent pH (3-11), COD concentration (1500-6000 mg/L), inter-electrode distance (1-3 cm), and electrode combination (Fe and Al) on the color removal, COD removal, and power consumption were studied. The maximum color and COD removal percentages of 100 and 95 %, respectively, were obtained at the current density of 4 A/dm2, electrolyte concentration of 4 g/L, effluent pH of 7, COD concentration of 3000 mg/L, electrode combination of Fe/Fe, inter-electrode distance of 1 cm, and reaction time of 4 h, respectively. The color and COD removal percentages were analyzed by using an UV/Vis spectrophotometer and closed reflux method. The results showed that the sono-electrocoagulation process could be used as an efficient and environmental friendly technique for complete pollutant removal.
Collapse
Affiliation(s)
- P Asaithambi
- Department of Chemical Engineering, Faculty of Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia.
| | - Abdul Raman Abdul Aziz
- Department of Chemical Engineering, Faculty of Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia.
| | - Baharak Sajjadi
- Department of Chemical Engineering, Faculty of Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Wan Mohd Ashri Bin Wan Daud
- Department of Chemical Engineering, Faculty of Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia
| |
Collapse
|
13
|
Hu C, Hu B, Wang Y, Zhang Q, Zhou X. TiO2 nanotube arrays based DSA electrode and application in treating dye wastewater. RUSS J ELECTROCHEM+ 2016. [DOI: 10.1134/s1023193516050062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
14
|
Ferreira VC, Neves MC, Hillman AR, Monteiro OC. Novel one-pot synthesis and sensitisation of new BiOCl–Bi2S3 nanostructures from DES medium displaying high photocatalytic activity. RSC Adv 2016. [DOI: 10.1039/c6ra14474h] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
A novel one-pot synthetic procedure yields hierarchically nanostructured BiOCl–Bi2S3 nanoparticles with improved photocatalytic activity towards degradation of rhodamine B.
Collapse
Affiliation(s)
- V. C. Ferreira
- Centro de Química e Bioquímica
- Faculdade de Ciências
- Universidade de Lisboa
- 1749-016 Lisboa
- Portugal
| | - M. C. Neves
- CICECO
- Department of Chemistry
- University of Aveiro
- 3810-193 Aveiro
- Portugal
| | - A. R. Hillman
- Chemistry Department
- University of Leicester
- Leicester
- UK
| | - O. C. Monteiro
- Centro de Química e Bioquímica
- Faculdade de Ciências
- Universidade de Lisboa
- 1749-016 Lisboa
- Portugal
| |
Collapse
|
15
|
Baslak C, Arslan G, Kus M, Cengeloglu Y. Removal of Rhodamine B from water by using CdTeSe quantum dot-cellulose membrane composites. RSC Adv 2016. [DOI: 10.1039/c5ra23433f] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Facilitated transport of Rhodamine B through a novel polymer inclusion membrane (PIM) containing CdTeSe Quantum Dots (QDs) as a carrier reagent has been investigated.
Collapse
Affiliation(s)
- Canan Baslak
- Faculty of Science
- Department of Chemistry
- Selcuk University
- Konya
- Turkey
| | - Gulsin Arslan
- Faculty of Science
- Department of Biochemistry
- Selcuk University
- Konya
- Turkey
| | - Mahmut Kus
- Engineering Faculty
- Chemical Engineering
- Selcuk University
- Konya
- Turkey
| | - Yunus Cengeloglu
- Faculty of Science
- Department of Chemistry
- Selcuk University
- Konya
- Turkey
| |
Collapse
|
16
|
Pal M, Bera S, Jana S. Sol–gel based simonkolleite nanopetals with SnO2 nanoparticles in graphite-like amorphous carbon as an efficient and reusable photocatalyst. RSC Adv 2015. [DOI: 10.1039/c5ra12322d] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Sol–gel based simonkolleite nanopetals/SnO2 nanoparticles embedded in graphite-like amorphous carbon is described as a photocatalyst towards degradation of rhodamine 6G dye under UV illumination.
Collapse
Affiliation(s)
- Moumita Pal
- Sol-Gel Division
- CSIR-Central Glass and Ceramic Research Institute (CSIR-CGCRI)
- Kolkata 700032
- India
| | - Susanta Bera
- Sol-Gel Division
- CSIR-Central Glass and Ceramic Research Institute (CSIR-CGCRI)
- Kolkata 700032
- India
| | - Sunirmal Jana
- Sol-Gel Division
- CSIR-Central Glass and Ceramic Research Institute (CSIR-CGCRI)
- Kolkata 700032
- India
| |
Collapse
|
17
|
Kaur P, Sangal VK, Kushwaha JP. Modeling and evaluation of electro-oxidation of dye wastewater using artificial neural networks. RSC Adv 2015. [DOI: 10.1039/c4ra14160a] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Treatment of CBSOL LE red wool dye containing wastewater by an electro-oxidation (EO) method was investigated using a Ti/RuO2 electrode.
Collapse
Affiliation(s)
- Parminder Kaur
- School of Energy and Environment
- Thapar University
- Patiala
- India
| | | | | |
Collapse
|
18
|
Raschitor A, Fernandez CM, Cretescu I, Rodrigo MA, Cañizares P. Sono-electrocoagulation of wastewater polluted with Rhodamine 6G. Sep Purif Technol 2014. [DOI: 10.1016/j.seppur.2014.08.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
19
|
Femtosecond laser induced emission enhancement in Rhodamine6G. J Photochem Photobiol A Chem 2014. [DOI: 10.1016/j.jphotochem.2014.04.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
20
|
Zhong M, Meng X, Wu F, Li J, Fang Y. Mo doping-enhanced dye absorption of Bi2Se3 nanoflowers. NANOSCALE RESEARCH LETTERS 2013; 8:451. [PMID: 24172176 PMCID: PMC4228436 DOI: 10.1186/1556-276x-8-451] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2013] [Accepted: 09/10/2013] [Indexed: 06/02/2023]
Abstract
A simple solvothermal approach is explored to prepare Bi2-xMoxSe3 nanostructures by employing N,N-dimethylformamide (DMF) as the solvent. Mo plays an important role in the assembly of the Bi2-xMoxSe3 nanostructures from nanoplates to nanoflowers. Structural and morphological studies indicate that the resulting products are large specific surface area single-crystalline Bi2-xMoxSe3 nanoflowers self-assembled from thin nanoplates during the reaction process. The absorption properties of the as-prepared samples are investigated with Rhodamine B (RhB) as dye, and it is found that the Bi1.85Mo0.15Se3 nanoflowers show an optimal adsorption capacity, implying that Mo doping not only changes the morphologies of the nanostructures but also enhances their absorption behaviors.
Collapse
Affiliation(s)
- Mianzeng Zhong
- Research Center for Light Emitting Diodes (LED), Zhejiang Normal University, Jinhua, Zhejiang Province 321004, China
| | - Xiuqing Meng
- Research Center for Light Emitting Diodes (LED), Zhejiang Normal University, Jinhua, Zhejiang Province 321004, China
| | - Fengmin Wu
- Research Center for Light Emitting Diodes (LED), Zhejiang Normal University, Jinhua, Zhejiang Province 321004, China
| | - Jingbo Li
- Research Center for Light Emitting Diodes (LED), Zhejiang Normal University, Jinhua, Zhejiang Province 321004, China
| | - Yunzhang Fang
- Research Center for Light Emitting Diodes (LED), Zhejiang Normal University, Jinhua, Zhejiang Province 321004, China
| |
Collapse
|
21
|
Wang R, Dong ZP, Wang RQ, Tian X, Li CY, Li R. Efficient removal of Cd2+ by dialdehyde phenylhydrazine starch from aqueous solution. RSC Adv 2013. [DOI: 10.1039/c3ra42670j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
|
22
|
|