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Qi Z, Han Y, Afrane S, Liu X, Zhang M, Crittenden J, Chen JL, Mao G. Patent mining on soil pollution remediation technology from the perspective of technological trajectory. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 316:120661. [PMID: 36403878 DOI: 10.1016/j.envpol.2022.120661] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Revised: 10/21/2022] [Accepted: 11/11/2022] [Indexed: 06/16/2023]
Abstract
Recent years have seen a marked growth in soil environmental problems, however, the research & development (R&D) direction of soil pollution remediation technology (SPRT) for addressing related challenges to the global ecosystem is still unclear. Patent is the most effective carrier of technological information. Therefore, this study investigates the status and future direction of SPRT through the analysis and mining of 14,475 patents from 1971 to 2020. In 2006-2020, 14,435 SPRT patents (79% of the total) were published, which is in the development stage. By measuring the proportion of high-value patents, determined by the ratio of the number of patent families containing two or more patents (PF2) to that containing at least one patent (PF1), we found that United States (PF2/PF1 = 0.711), Japan (PF2/PF1 = 0.500), and South Korea (PF2/PF1 = 0.431) hold a monopoly. International patent organizations serve as a bridge for technology transfer. Patent CN101947539-A measured by structural hole index (Effective size = 98.194, Efficiency = 0.926) has the most significant technological influence. Therefore, in order to accomplish the technological transition and improve the soil remediation capacity, more attention should be paid to the microbial-assisted phytoremediation technology related to inorganic pollutants, hyperaccumulators and stabilizers. Additionally, patents CN102834190-A (Effective size = 23.930, Efficiency = 0.855, Constraint = 0.141, Hierarchy = 0.089) and CN105855289 (Effective size = 21.453, Efficiency = 0.795 Constraint = 0.149, Hierarchy = 0.086) are both at the location of structural holes. So, more research should be carried out on green and cost-effective solutions for reducing organic pollutants in soil remediation. The current study identifies opportunities for innovations and breakthroughs in SPRT and offers relevant information on technological development prospects.
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Affiliation(s)
- Zefeng Qi
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, China; Center for Green Buildings and Sponge Cities, Georgia Tech Tianjin University Shenzhen Institute, Shenzhen, Guangdong, 518071, China
| | - Yixin Han
- Shandong National Standards Technical Review and Assessment Center, Jinan, 250002, China
| | - Sandylove Afrane
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, China; Center for Green Buildings and Sponge Cities, Georgia Tech Tianjin University Shenzhen Institute, Shenzhen, Guangdong, 518071, China
| | - Xi Liu
- Institute of Blue and Green Development, Shandong University, Weihai, 264209, China.
| | - Mingqi Zhang
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, China; Center for Green Buildings and Sponge Cities, Georgia Tech Tianjin University Shenzhen Institute, Shenzhen, Guangdong, 518071, China
| | - John Crittenden
- Brook Byers Institute for Sustainable Systems, School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Jian Lin Chen
- Department of Science, School of Science and Technology, Hong Kong Metropolitan University, Good Shepherd Street, Ho Man Tin, Hong Kong SAR, China; Shenzhen Research Institute of City University of Hong Kong, Shenzhen, China; State Key Laboratory of Marine Pollution and Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Guozhu Mao
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, China; Center for Green Buildings and Sponge Cities, Georgia Tech Tianjin University Shenzhen Institute, Shenzhen, Guangdong, 518071, China
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2
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Biswas B, Goel S. Electrocoagulation and electrooxidation technologies for pesticide removal from water or wastewater: A review. CHEMOSPHERE 2022; 302:134709. [PMID: 35489460 DOI: 10.1016/j.chemosphere.2022.134709] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 04/17/2022] [Accepted: 04/21/2022] [Indexed: 06/14/2023]
Abstract
Pesticides are known to be threats to the environment and human health. Excessive use of pesticides in agricultural practice can contaminate water bodies, leading to cancer, asthma, neurological disorders, reproductive defects, and hormonal disruption. Electrochemical methods such as electrocoagulation and electrooxidation can be used for pesticide removal due to their numerous advantages such as high efficiency, less sludge production, and low operational cost. During electrocoagulation, dissolution of anode metals results in metal hydroxide complexes, which precipitate with the contaminant present in the reactor. Simultaneously, electro-flotation occurs at the cathode and results in the evolution of hydrogen gas bubbles, leading to flotation of floc to the top surface of the reactor. This review focuses on the removal mechanisms, kinetics, modeling, effects of influencing factors, and sludge characterization of pesticide removal using electrocoagulation and electrooxidation. Major influencing factors include cell configuration, electrode material, current density, pH, supporting electrolyte concentration. In general, aluminum and iron are the most common electrodes used for pesticide removal using electrocoagulation, while boron-doped diamond was used to a far greater extent as the electrode in electrooxidation studies. Greater than 99% removal efficiency was observed in both processes. Overall, this review summarizes the use of electrochemical methods for pesticide removal and offers valuable information to researchers in this area of study.
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Affiliation(s)
- Bishwatma Biswas
- Environmental Engineering and Management, Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, West Bengal, India
| | - Sudha Goel
- Environmental Engineering and Management, Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, West Bengal, India.
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3
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de Mello R, Rodrigo MA, Motheo AJ. Electro-oxidation of tetracycline in methanol media on DSA®-Cl 2. CHEMOSPHERE 2021; 273:129696. [PMID: 33524759 DOI: 10.1016/j.chemosphere.2021.129696] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 01/16/2021] [Accepted: 01/17/2021] [Indexed: 06/12/2023]
Abstract
The electro-oxidation of tetracycline (TeC) in methanol medium containing chloride or sulfate ions was evaluated using a DSA®-Cl2 in a flow reactor and compared with BDD. The results show that after 30 min of electrolysis no TeC is detected by liquid chromatography when chloride is used as supporting electrolyte. On the other hand, after 90 min of electrolysis using a BDD anode only 61% of TeC was removed from solutions with chloride, but in the presence of sulfate the removal reaches 94%. This evidences that the oxidizing species generated during electrochemical oxidation control the process and the mechanism of degradation of the TeC. Besides that, it was possible to infer that only a small amount of methanol might convert to formaldehyde or formic acid, although they were not detected according to the nil changes in the FTIR spectra or in the HPLC chromatograms recorded.
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Affiliation(s)
- Rodrigo de Mello
- São Carlos Institute of Chemistry, University of São Paulo, P.O. Box 780, CEP 13560-970, São Carlos, SP, Brazil
| | - Manuel A Rodrigo
- Department of Chemical Engineering, Faculty of Chemical Sciences & Technologies, Universidad de Castilla - La Mancha, Campus Universitario S/n, 13071, Ciudad Real, Spain
| | - Artur J Motheo
- São Carlos Institute of Chemistry, University of São Paulo, P.O. Box 780, CEP 13560-970, São Carlos, SP, Brazil.
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Dória AR, Santos GOS, Pelegrinelli MMS, Silva DC, de Matos DB, Cavalcanti EB, Silva RS, Salazar-Banda GR, Eguiluz KIB. Improved 4-nitrophenol removal at Ti/RuO 2-Sb 2O 4-TiO 2 laser-made anodes. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:23634-23646. [PMID: 32812159 DOI: 10.1007/s11356-020-10451-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 08/09/2020] [Indexed: 06/11/2023]
Abstract
In this study, binary and ternary mixed metal oxide anodes of Ti/RuO2-Sb2O4 and Ti/RuO2-Sb2O4-TiO2 were prepared using two different heating methods: conventional furnace and alternative CO2 laser heating. The produced anodes were physically and electrochemically characterized by using different techniques. The main difference found in the laser-made anodes was their more compact morphology, without the common deep cracks found in anodes made by typical thermal decomposition, which showed an important correlation with the prolonged accelerated service life. The correlation between the physicochemical properties of the anodes with their performance towards the 4-nitrophenol oxidations is discussed. The results demonstrated that the ternary anode (Ti/RuO2-Sb2O4-TiO2) is very promising, presenting a kinetic 5.7 times faster than the respective binary anode and the highest removal efficiency when compared with conventionally made anodes. Also, the lowest energy consumption per unit of mass of contaminant removed is seen for the laser-made Ti/RuO2-Sb2O4-TiO2 anode, which evidences the excellent cost-benefit of this anode material. Finally, some by-products were identified, and a degradation route is proposed. Graphical abstract.
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Affiliation(s)
- Aline R Dória
- Electrochemistry and Nanotechnology Laboratory, Institute of Technology and Research (ITP), Aracaju, SE, Brazil
- Postgraduate Program in Process Engineering (PEP), Tiradentes University, Aracaju, SE, Brazil
| | - Géssica O S Santos
- Electrochemistry and Nanotechnology Laboratory, Institute of Technology and Research (ITP), Aracaju, SE, Brazil.
- Postgraduate Program in Process Engineering (PEP), Tiradentes University, Aracaju, SE, Brazil.
| | - Mariane M S Pelegrinelli
- Electrochemistry and Nanotechnology Laboratory, Institute of Technology and Research (ITP), Aracaju, SE, Brazil
| | - Deyvid C Silva
- Functional Nanomaterials Group, Department of Physics, Federal University of Sergipe, São Cristóvão, SE, Brazil
| | - Danielle B de Matos
- Postgraduate Program in Process Engineering (PEP), Tiradentes University, Aracaju, SE, Brazil
- Waste and Sewage Treatment Laboratory, Institute of Technology and Research (ITP), Aracaju, SE, Brazil
| | - Eliane Bezerra Cavalcanti
- Postgraduate Program in Process Engineering (PEP), Tiradentes University, Aracaju, SE, Brazil
- Waste and Sewage Treatment Laboratory, Institute of Technology and Research (ITP), Aracaju, SE, Brazil
| | - Ronaldo S Silva
- Functional Nanomaterials Group, Department of Physics, Federal University of Sergipe, São Cristóvão, SE, Brazil
| | - Giancarlo R Salazar-Banda
- Electrochemistry and Nanotechnology Laboratory, Institute of Technology and Research (ITP), Aracaju, SE, Brazil
- Postgraduate Program in Process Engineering (PEP), Tiradentes University, Aracaju, SE, Brazil
| | - Katlin I B Eguiluz
- Electrochemistry and Nanotechnology Laboratory, Institute of Technology and Research (ITP), Aracaju, SE, Brazil
- Postgraduate Program in Process Engineering (PEP), Tiradentes University, Aracaju, SE, Brazil
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Barbosa Ferreira M, Souza FL, Muñoz-Morales M, Sáez C, Cañizares P, Martínez-Huitle CA, Rodrigo MA. Clopyralid degradation by AOPs enhanced with zero valent iron. JOURNAL OF HAZARDOUS MATERIALS 2020; 392:122282. [PMID: 32105951 DOI: 10.1016/j.jhazmat.2020.122282] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 01/22/2020] [Accepted: 02/10/2020] [Indexed: 06/10/2023]
Abstract
Four different technologies have been compared (photolysis, ZVI + photolysis, electrolysis and ZVI + electrolysis) regarding the: (1) degradation of clopyralid, (2) extent of its mineralization, (3) formation of by-products and main reaction pathways. Results show that photolysis is the less efficient treatment and it only attains 5 % removal of the pollutant, much less than ZVI, which reaches 45 % removal and that electrolysis, which attains complete removal and 78 % mineralization within 4 h. When ZVI is used as pre-treatment of electrolysis, it was obtained the most efficient technology. The identification of transformation products was carried out for each treatment by LCMS. In total, ten products were identified. Tentative pathways for preferential clopyralid degradation for all processes were proposed. This work draws attention of the synergisms caused by the coupling of techniques involving the treatment of chlorinated compound and sheds light on how the preferential mechanisms of each treatment evaluated occurred.
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Affiliation(s)
- M Barbosa Ferreira
- Institute of Chemistry, Federal University of Rio Grande do Norte, Campus Universitario 3000, 59078-970 Natal, RN, Brazil
| | - F L Souza
- Department of Chemical Engineering, Faculty of Chemical Sciences and Technologies, University of Castilla-La Mancha, Campus Universitario s/n, 13071 Ciudad Real, Spain
| | - M Muñoz-Morales
- Department of Chemical Engineering, Faculty of Chemical Sciences and Technologies, University of Castilla-La Mancha, Campus Universitario s/n, 13071 Ciudad Real, Spain
| | - C Sáez
- Department of Chemical Engineering, Faculty of Chemical Sciences and Technologies, University of Castilla-La Mancha, Campus Universitario s/n, 13071 Ciudad Real, Spain
| | - P Cañizares
- Department of Chemical Engineering, Faculty of Chemical Sciences and Technologies, University of Castilla-La Mancha, Campus Universitario s/n, 13071 Ciudad Real, Spain
| | - C A Martínez-Huitle
- Institute of Chemistry, Federal University of Rio Grande do Norte, Campus Universitario 3000, 59078-970 Natal, RN, Brazil
| | - M A Rodrigo
- Department of Chemical Engineering, Faculty of Chemical Sciences and Technologies, University of Castilla-La Mancha, Campus Universitario s/n, 13071 Ciudad Real, Spain.
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Muñoz-Morales M, Sáez C, Cañizares P, Rodrigo MA. Improvement of electrochemical oxidation efficiency through combination with adsorption processes. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 262:110364. [PMID: 32250826 DOI: 10.1016/j.jenvman.2020.110364] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 01/23/2020] [Accepted: 02/26/2020] [Indexed: 06/11/2023]
Abstract
In this work, a three-step process (adsorption-desorption-electrolysis) is evaluated as an interesting approach for the removal of organochlorinated compounds (clopyralid, lindane and perchloroethylene) with different physical properties (solubility and vapor pressure) from low concentrated wastewater. First steps are based on the adsorptive capacity of granular active carbon (GAC) particles to retain organics and on the solvent capacity of methanol to extract them to concentrated solution and regenerate GAC. In the last step of electrolysis with conductive diamond electrodes, the degradation of pesticide is projected, as well as the recovery of methanol. Results show that clopyralid, lindane and PCE are efficiently retained in GAC, although adsorption efficiency depend on pollutant/GAC ratio and physicochemical properties of pollutant. Pretreatment allows the concentration of clopyralid and PCE solutions up to 8 times, but worse results are obtained in case of lindane solutions. Electrolysis of concentrated methanol solution seems to be more efficient than electrolysis of diluted aqueous wastes, mainly in the case of clopyralid. In all cases, electrochemical degradation fits a first order kinetics confirming mixed oxidation mechanisms with diffusion control of the direct processes and mediated oxidation. Results obtained in terms of current efficiency and energy consumption of electrolysis step point out the lower operation cost of concentrated liquid wastes and encourage further works on the development of cost-effective combined processes for the treatment of diluted solutions polluted with polar compounds (such as clopyralid).
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Affiliation(s)
- M Muñoz-Morales
- Department of Chemical Engineering, Faculty of Chemical Sciences and Technologies, University of Castilla-La Mancha, Campus Universitario s/n, 13071, Ciudad Real, Spain
| | - C Sáez
- Department of Chemical Engineering, Faculty of Chemical Sciences and Technologies, University of Castilla-La Mancha, Campus Universitario s/n, 13071, Ciudad Real, Spain.
| | - P Cañizares
- Department of Chemical Engineering, Faculty of Chemical Sciences and Technologies, University of Castilla-La Mancha, Campus Universitario s/n, 13071, Ciudad Real, Spain
| | - M A Rodrigo
- Department of Chemical Engineering, Faculty of Chemical Sciences and Technologies, University of Castilla-La Mancha, Campus Universitario s/n, 13071, Ciudad Real, Spain
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7
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Raschitor A, Llanos J, Rodrigo MA, Cañizares P. Is it worth using the coupled electrodialysis/electro-oxidation system for the removal of pesticides? Process modelling and role of the pollutant. CHEMOSPHERE 2020; 246:125781. [PMID: 31918095 DOI: 10.1016/j.chemosphere.2019.125781] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Revised: 12/19/2019] [Accepted: 12/27/2019] [Indexed: 06/10/2023]
Abstract
This work presents the development of the electrodialysis/electro-oxidation (EDEO) technology, assessing the role of the pollutant and the modelling of the system in order to look for the key aspects for the development of the technology. According to the results obtained, it can be concluded that electrodialysis can be properly used to concentrate clopyralid, having the selected ionic exchange membranes (AMX) an adsorption capacity of 1.64 ± 0.26 mg cm-2. Moreover, it was observed that BDD anodes exhibit a higher degradation and mineralization current efficiencies than MMO when using electro-oxidation (EO). The role of the supporting electrolyte was also assessed, observing a slight better performance of BDD with sulphate (maximum mineralization current efficiency of 80%) and a much superior degradation efficiency with chloride when selecting MMO as anode material. Regarding the EDEO technology, it was checked that this process only overcomes the performance of EO when using MMO anodes, a result that is explained by the ratio between degradation and transport rates. Finally, a simple model was presented and successfully used to predict the degradation rate constants and to simulate the performance of EDEO under different scenarios. These simulations confirm that the transport rate needs to overcome the degradation rate in order to assure a better performance of the EDEO system compared to the conventional EO. Moreover, the simulations explain the results obtained in the present and previous works revealing the key for a further development of the EDEO technology in the future.
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Affiliation(s)
- A Raschitor
- Chemical Engineering Department, Facultad de Ciencias y Tecnologías Químicas, University of Castilla-La Mancha, Edificio Enrique Costa Novella. Av. Camilo José Cela nº 12, 13071, Ciudad Real, Spain
| | - J Llanos
- Chemical Engineering Department, Facultad de Ciencias y Tecnologías Químicas, University of Castilla-La Mancha, Edificio Enrique Costa Novella. Av. Camilo José Cela nº 12, 13071, Ciudad Real, Spain.
| | - M A Rodrigo
- Chemical Engineering Department, Facultad de Ciencias y Tecnologías Químicas, University of Castilla-La Mancha, Edificio Enrique Costa Novella. Av. Camilo José Cela nº 12, 13071, Ciudad Real, Spain
| | - P Cañizares
- Chemical Engineering Department, Facultad de Ciencias y Tecnologías Químicas, University of Castilla-La Mancha, Edificio Enrique Costa Novella. Av. Camilo José Cela nº 12, 13071, Ciudad Real, Spain
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Acosta-Santoyo G, Llanos J, Raschitor A, Bustos E, Cañizares P, Rodrigo M. Performance of ultrafiltration as a pre-concentration stage for the treatment of oxyfluorfen by electrochemical BDD oxidation. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2019.116366] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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Acosta-Santoyo G, Raschitor A, Bustos E, Llanos J, Cañizares P, Rodrigo MA. Electrochemically assisted dewatering for the removal of oxyfluorfen from a coagulation/flocculation sludge. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 258:110015. [PMID: 31929057 DOI: 10.1016/j.jenvman.2019.110015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 11/29/2019] [Accepted: 12/17/2019] [Indexed: 06/10/2023]
Abstract
This work focuses on the evaluation of the electrochemical dewatering of sludge obtained in the coagulation of wastes polluted with oxyfluorfen. To do this, sludge samples were treated, aiming not only to reduce the sludge volume, but also to facilitate the degradation of oxyfluorfen contained in the cake via electrolysis with a boron-doped diamond anode. Results show that water can be effectively recovered through three sequential stages. First, a gravity-driven stage, that can recover around 60% of initial volume and where no oxyfluorfen is dragged. Then, a second stage that involves the application of pressure and which accounts for the recuperation of an additional 25% of the total volume of the water removed and in which oxyfluorfen also remained in the cake. Finally, an electrochemical stage, which involves the application of electricity with increasing electric fields (1.0, 2.0, 4.0, and 16.0 V cm-1), accounting for the recovery of the rest of water released and where an electrolytic degradation of oxyfluorfen is obtained, whose extension depends on the electrode configuration used in the electro-dewatering cell. This electrode configuration also influences the retention or loss of oxyfluorfen from the cake, being the optimum choice the placement of the cathode downstream, next to the outlet of the dewatering cell.
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Affiliation(s)
- Gustavo Acosta-Santoyo
- Department of Chemical Engineering, Universidad de Castilla - La Mancha, Enrique Costa Building, Campus Universitario s/n, 13071, Ciudad Real, Spain; Centro de Investigación y Desarrollo Tecnológico en Electroquímica, Parque Tecnológico Querétaro s/n, Sanfandila, Pedro Escobedo, Querétaro, Mexico
| | - Alexandra Raschitor
- Department of Chemical Engineering, Universidad de Castilla - La Mancha, Enrique Costa Building, Campus Universitario s/n, 13071, Ciudad Real, Spain
| | - Erika Bustos
- Centro de Investigación y Desarrollo Tecnológico en Electroquímica, Parque Tecnológico Querétaro s/n, Sanfandila, Pedro Escobedo, Querétaro, Mexico
| | - Javier Llanos
- Department of Chemical Engineering, Universidad de Castilla - La Mancha, Enrique Costa Building, Campus Universitario s/n, 13071, Ciudad Real, Spain
| | - Pablo Cañizares
- Department of Chemical Engineering, Universidad de Castilla - La Mancha, Enrique Costa Building, Campus Universitario s/n, 13071, Ciudad Real, Spain
| | - Manuel Andrés Rodrigo
- Department of Chemical Engineering, Universidad de Castilla - La Mancha, Enrique Costa Building, Campus Universitario s/n, 13071, Ciudad Real, Spain.
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Raschitor A, Llanos J, Cañizares P, Rodrigo M. Improved electrolysis of colloid-polluted wastes using ultrasounds and electrocoagulation. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2019.115926] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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11
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Muñoz-Morales M, Sáez C, Cañizares P, Rodrigo MA. Enhanced electrolytic treatment for the removal of clopyralid and lindane. CHEMOSPHERE 2019; 234:132-138. [PMID: 31207419 DOI: 10.1016/j.chemosphere.2019.06.059] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 06/08/2019] [Accepted: 06/08/2019] [Indexed: 06/09/2023]
Abstract
In this work, it is evaluated the more critical point of a new electrochemical technology for the removal of organic pollutants based on the regeneration of granular active carbon (GAC) (that can be used efficiently to concentrate aqueous wastes) with methanol and in the electrochemical treatment of methanol with conductive diamond electrochemical oxidation (CDEO). The system proposed was studied with lindane and clopyralid. Results show that it is possible the complete removal of the raw pesticides and intermediates formed by electrolyzing these species in methanol media and that both sodium chloride and sodium hydroxide can be used as supporting electrolyte to increase the conductivity of methanol. The cell voltages obtained are quite similar to those obtained during the electrolysis of aqueous wastes. The electrolysis of these dilute solutions does not generate significant concentrations of intermediates and the depletion of the raw pollutant fits well to a pseudo-first order kinetic model. Oxidants capable to oxidize iodide to iodine are produced during the electrolysis in methanol media and they have an important influence on the degradation of the pollutants. The new technology, based on the concentration of the pollutant before electrolysis, allows to remove completely pollutants from soil and soil washing fluids in a more efficient way, although the concentration of pollutant attained and, hence, the efficiency of the overall removal process depends on the adsorption equilibria of the pollutant in aqueous and methanol media.
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Affiliation(s)
- M Muñoz-Morales
- Department of Chemical Engineering, Faculty of Chemical Sciences and Technologies, University of Castilla-La Mancha, Campus Universitario s/n, 13071, Ciudad Real, Spain
| | - C Sáez
- Department of Chemical Engineering, Faculty of Chemical Sciences and Technologies, University of Castilla-La Mancha, Campus Universitario s/n, 13071, Ciudad Real, Spain
| | - P Cañizares
- Department of Chemical Engineering, Faculty of Chemical Sciences and Technologies, University of Castilla-La Mancha, Campus Universitario s/n, 13071, Ciudad Real, Spain
| | - M A Rodrigo
- Department of Chemical Engineering, Faculty of Chemical Sciences and Technologies, University of Castilla-La Mancha, Campus Universitario s/n, 13071, Ciudad Real, Spain.
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12
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Erol K, Yıldız E, Alacabey İ, Karabörk M, Uzun L. Magnetic diatomite for pesticide removal from aqueous solution via hydrophobic interactions. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:33631-33641. [PMID: 31587166 DOI: 10.1007/s11356-019-06423-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2019] [Accepted: 09/03/2019] [Indexed: 06/10/2023]
Abstract
Pesticides are highly hazardous chemicals for the environment and human health and their use in agriculture is constantly increasing. Although 1,1,1-trichloro-2,2-bis(4-chlorophenyl) ethane 4,4'-DDT was banned at developed countries, it is still one of the most dangerous of chemical due to accumulation in the environment. It is known that the toxicity of DDT affects some enzyme systems biochemically. The main motivation of this study is to develop an effective adsorbate for the removal DDT, which was chosen as a model hydrophobic pesticide, out of aqueous systems. For this purpose, the bare diatomite particles were magnetically modified and a hydrophobic ligand attached to enhance its adsorptive and physio-chemical features. Under optimal conditions, a high adsorption capacity, around 120 mg/g with the hydrophobic and magnetic diatomite particles, modification of the diatomite particles reduced average pores diameter whereas surface area and total pore volume increased (around 15-folds). After five consecutive adsorption-desorption cycles, no significant decrease in adsorption capability was observed. The adsorption isotherms (Langmuir, Freundlich, and Flory-Huggins) applied to the data indicated that the adsorption process occurred via monolayer adsorption in an entropy-driven manner. The kinetic data also revealed the quick adsorption process without any diffusion limitations. Graphical Abstract.
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Affiliation(s)
- Kadir Erol
- Department of Property Protection and Security, Osmancık Ömer Derindere Vocational School, Hitit University, 19500, Osmancık, Turkey.
| | - Emrecan Yıldız
- Department of Chemistry, Faculty of Science, Hacettepe University, 06800, Ankara, Turkey
| | - İhsan Alacabey
- Vocational School of Health Services, Mardin Artuklu University, 47200, Mardin, Turkey
| | - Muharrem Karabörk
- Department of Chemistry, Faculty of Arts and Sciences, Kahramanmaraş Sütçü İmam University, 46100, Kahramanmaraş, Turkey
| | - Lokman Uzun
- Department of Chemistry, Faculty of Science, Hacettepe University, 06800, Ankara, Turkey
- Advanced Technologies Application and Research Center, Hacettepe University, 06800, Ankara, Turkey
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Raschitor A, Llanos J, Rodrigo MA, Cañizares P. Combined electrochemical processes for the efficient degradation of non-polar organochlorine pesticides. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 248:109289. [PMID: 31344559 DOI: 10.1016/j.jenvman.2019.109289] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 07/11/2019] [Accepted: 07/15/2019] [Indexed: 06/10/2023]
Abstract
This study deals with the development of efficient and economic electrochemical treatment processes to confront the treatment of liquid wastes containing non-polar organochlorine pesticides. In previous works, it was demonstrated that it is possible to use electrocoagulation (EC) as a concentration technique for a model organochlorine pesticide (oxyfluorfen). Within this framework, the present work describes a process for the degradation of wastes containing non-polar organochlorines (oxyfluorfen or lindane) in two consecutive stages: 1) a first stage of concentration by electrocoagulation; 2) a second stage of electrochemical degradation by electro-oxidation (EO) or electro-Fenton (EF). The first result reached in the present work is that it is possible to remove close to 50% of both pollutants using EO and more that 94% using EF. Additionally, it was proved that the addition of a pre-concentration stage decreases by a factor of 20 the power consumption needed to deplete by EO the same amount of the initial pollutant. Moreover, when EF process is performed to the concentrated stream, the power consumption is further reduced, getting values (for 1-log removal) as low as 14.51 kWh m-3 for oxyfluorfen decrease and 49.7 kWh m-3 for lindane. These results strengthen the fact that the removal efficiency increases with the concentration of the pollutant and demonstrate that the combination of concentration steps and electrochemical degradation technologies is an efficient and promising alternative for the degradation of non-polar organochlorines.
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Affiliation(s)
- A Raschitor
- Department of Chemical Engineering, Faculty of Chemical Sciences & Technologies, Ciudad Real, Universidad de Castilla-La Mancha, Ciudad Real 13071, Spain
| | - J Llanos
- Department of Chemical Engineering, Faculty of Chemical Sciences & Technologies, Ciudad Real, Universidad de Castilla-La Mancha, Ciudad Real 13071, Spain.
| | - M A Rodrigo
- Department of Chemical Engineering, Faculty of Chemical Sciences & Technologies, Ciudad Real, Universidad de Castilla-La Mancha, Ciudad Real 13071, Spain
| | - P Cañizares
- Department of Chemical Engineering, Faculty of Chemical Sciences & Technologies, Ciudad Real, Universidad de Castilla-La Mancha, Ciudad Real 13071, Spain
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Karaçali A, Muñoz-Morales M, Kalkan S, Körbahti BK, Saez C, Cañizares P, Rodrigo MA. A comparison of the electrolysis of soil washing wastes with active and non-active electrodes. CHEMOSPHERE 2019; 225:19-26. [PMID: 30856471 DOI: 10.1016/j.chemosphere.2019.02.175] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Revised: 02/23/2019] [Accepted: 02/25/2019] [Indexed: 06/09/2023]
Abstract
A comparison between the performance of electrolysis of three different soil-washing wastes with platinum and boron doped diamond (BDD) anodes is carried out in this work. Results demonstrate that the treatment is more efficient with BDD for perchloroethylene and clopyralid but not for the case of lindane, because in this case there is a competitive oxidation between lindane and Sodium Dodecyl Sulfate used to extract this pollutant from soil. First order kinetics are observed in each compound with higher removal at the early stages and generally better results are obtained when using BDD as anode. The evolution of pH and a voltammetry study indicate a higher direct oxidation rate in the case of platinum and more importance of hydroxyl radical mediated processes with diamond anodes. Similar speciation is obtained during the electro-oxidation using BDD and platinum electrodes although the concentration of intermediates vary significantly.
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Affiliation(s)
- Atakan Karaçali
- Department of Chemical Engineering, Faculty of Engineering, Mersin University, 33343, Mersin, Turkey
| | - Martin Muñoz-Morales
- Department of Chemical Engineering, Faculty of Chemical Sciences & Technologies, Universidad de Castilla La Mancha, Campus Universitario s/n, 13071, Ciudad Real, Spain
| | - Sabri Kalkan
- Department of Occupational Health and Safety, Vocational School, Toros University, 33140, Mersin, Turkey
| | - Bahadir K Körbahti
- Department of Chemical Engineering, Faculty of Engineering, Mersin University, 33343, Mersin, Turkey
| | - Cristina Saez
- Department of Chemical Engineering, Faculty of Chemical Sciences & Technologies, Universidad de Castilla La Mancha, Campus Universitario s/n, 13071, Ciudad Real, Spain
| | - Pablo Cañizares
- Department of Chemical Engineering, Faculty of Chemical Sciences & Technologies, Universidad de Castilla La Mancha, Campus Universitario s/n, 13071, Ciudad Real, Spain
| | - Manuel A Rodrigo
- Department of Chemical Engineering, Faculty of Chemical Sciences & Technologies, Universidad de Castilla La Mancha, Campus Universitario s/n, 13071, Ciudad Real, Spain.
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Membrane preconcentration as an efficient tool to reduce the energy consumption of perfluorohexanoic acid electrochemical treatment. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2018.03.050] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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16
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Competitive Anodic Oxidation of Methyl Paraben and Propylene Glycol: Keys to Understand the Process. ChemElectroChem 2018. [DOI: 10.1002/celc.201801332] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Ghimici L, Constantin M. Removal of the commercial pesticides Novadim Progress, Bordeaux mixture and Karate Zeon by pullulan derivatives based flocculants. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 218:31-38. [PMID: 29665484 DOI: 10.1016/j.jenvman.2018.04.056] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 03/23/2018] [Accepted: 04/11/2018] [Indexed: 06/08/2023]
Abstract
Cationic pullulan derivatives have been synthesized and evaluated, for the first time, as flocculants for the separation of the commercial pesticides, Novadim Progress (organophosphoric type), Bordeax mixture and Karate Zeon (pyrethroid type) from synthetic wastewater. The investigated polymer samples contained either pendent tertiary amine or quaternary ammonium salts groups. The separation efficiency was followed by UV-Vis spectroscopy, while the information regarding the mechanism involved in the separation of pesticide particles have been obtained by zeta potential. UV-Vis spectroscopy data showed strong pesticide particles/polycation interactions in case of Novadim Progress and Bordeaux mixture (maximum pesticide removal between 90% and 98%). Good separation efficiency (around 80%) of Karate Zeon emulsion was also noticed. The zeta potential measurements indicated that the charge neutralization was the common flocculation mechanism for the removal of these pesticides. In addition, the hydrogen bondings and chelation of copper ions by amide and/or tertiary amino groups of the polycations had a noteworthy contribution to the pesticide removal.
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Affiliation(s)
- Luminita Ghimici
- "Petru Poni" Institute of Macromolecular Chemistry, Aleea Grigore Ghica Voda, 41A, 700487 Iasi, Romania.
| | - Marieta Constantin
- "Petru Poni" Institute of Macromolecular Chemistry, Aleea Grigore Ghica Voda, 41A, 700487 Iasi, Romania
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Muñoz-Morales M, Sáez C, Cañizares P, Rodrigo M. A new strategy for the electrolytic removal of organics based on adsorption onto granular activated carbon. Electrochem commun 2018. [DOI: 10.1016/j.elecom.2018.04.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Millán M, Rodrigo MA, Fernández-Marchante CM, Díaz-Abad S, Peláez MC, Cañizares P, Lobato J. Towards the sustainable powering of the electrocoagulation of wastewater through the use of solar-vanadium redox flow battery: A first approach. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.03.055] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Lobato J, Mena E, Millán M. Improving a Redox Flow Battery Working under Realistic Conditions by Using of Graphene based Nanofluids. ChemistrySelect 2017. [DOI: 10.1002/slct.201701042] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Justo Lobato
- Chemical Engineering Department; Faculty of Chemical Sciences and Technologies; University of Castilla-La Mancha, Enrique Costa Novella; Av. Camilo Jose Cela n 12 Ciudad Real Spain
| | - Esperanza Mena
- Chemical Engineering Department; Faculty of Chemical Sciences and Technologies; University of Castilla-La Mancha, Enrique Costa Novella; Av. Camilo Jose Cela n 12 Ciudad Real Spain
| | - María Millán
- Chemical Engineering Department; Faculty of Chemical Sciences and Technologies; University of Castilla-La Mancha, Enrique Costa Novella; Av. Camilo Jose Cela n 12 Ciudad Real Spain
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Pérez J, Llanos J, Sáez C, López C, Cañizares P, Rodrigo M. A microfluidic flow-through electrochemical reactor for wastewater treatment: A proof-of-concept. Electrochem commun 2017. [DOI: 10.1016/j.elecom.2017.07.026] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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