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Castañeda LF, García I, Nava JL, Coreño O. Concurrent arsenic, fluoride, and hydrated silica removal from deep well water by electrocoagulation: Comparison of sacrificial anodes (Al, Fe, and Al-Fe). JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 365:121597. [PMID: 38941855 DOI: 10.1016/j.jenvman.2024.121597] [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: 12/19/2023] [Revised: 06/08/2024] [Accepted: 06/23/2024] [Indexed: 06/30/2024]
Abstract
Some studies have reported the removal of As (As) and fluoride (F-) using different sacrificial anodes; however, they have been tested with a synthetic solution in a batch system without hydrated silica (SiO2) interaction. Due to the above, concurrent removal of As, F-, and SiO2 from natural deep well water was evaluated (initial concentration: 35.5 μg L-1 As, 1.1 mg L-1F-, 147 mg L-1 SiO2, pH 8.6, and conductivity 1024 μS cm-1), by electrocoagulation (EC) process in continuous mode comparing three different configurations of sacrificial anodes (Al, Fe, and Al-Fe). EC was performed in a new reactor equipped with a small flow distributor and turbulence promoter at the entrance of the first channel to homogenize the flow. The best removal was found at j = 5 mA cm-2 and u = 1.3 cm s-1, obtaining arsenic residual concentrations (CAs) of 1.33, 0.45, and 0.77 μg L-1, fluoride residual concentration ( [Formula: see text] ) of 0.221, 0.495, and 0.622 mg L-1, and hydrated silica residual concentration ( [Formula: see text] ) of 21, 34, and 56 mg L-1, with costs of approximately 0.304, 0.198, and 0.228 USD m-3 for the Al, Fe and Al-Fe anodes, respectively. Al anode outperforms Fe and Al-Fe anodes in concurrently removing As, F- and SiO2. The residual concentrations of As and F- complied with the recommendations of the World Health Organization (WHO) (As < 10 μg L-1 and F- < 1 mg L-1). The spectroscopic analyses of the Al, Fe, and Al-Fe aggregates showed the formation of aluminosilicates, iron oxyhydroxides and oxides, and calcium and sodium silicates involved in removing As, F-, and SiO2. It is concluded that Al would serve as the most suitable sacrificial anode.
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Affiliation(s)
- Locksley F Castañeda
- CONAHCYT -University of Guanajuato, Department of Geomatic and Hydraulic Engineering, Av. Juárez 77, Centro, 36000, Guanajuato, Guanajuato, Mexico.
| | - Ivonne García
- University of Guanajuato, Department of Geomatic and Hydraulic Engineering, Av. Juárez 77, Centro, 36000, Guanajuato, Guanajuato, Mexico.
| | - José L Nava
- University of Guanajuato, Department of Geomatic and Hydraulic Engineering, Av. Juárez 77, Centro, 36000, Guanajuato, Guanajuato, Mexico.
| | - Oscar Coreño
- University of Guanajuato, Department of Civil Engineering, Av. Juárez 77, Centro, 36000, Guanajuato, Guanajuato, Mexico.
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Masoudian Z, Salehi-Lisar SY, Norastehnia A, Tarigholizadeh S. Duckweed Potential for the Phytoremediation of Linear Alkylbenzene Sulfonate (LAS): Identification of Some Intermediate Biodegradation Products and Evaluation of Antioxidant System. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2022; 109:364-372. [PMID: 35672521 DOI: 10.1007/s00128-022-03549-9] [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: 11/10/2021] [Accepted: 05/09/2022] [Indexed: 06/15/2023]
Abstract
Duckweed (Lemna minor L.) has a high potential for wastewater treatment. Here, its capability for bioremoval of linear alkylbenzene sulfonate (LAS) as one of the primary contaminants of water resources was evaluated. The effect of some operational parameters on surfactant removal efficiency was determined. Also, the impact of LAS on several physiological responses of Lemna was investigated. LAS remediation efficiency of L. minor was elevated with increasing LAS concentration, duckweed weight, and temperature. Furthermore, the optimal pH for removal was 7-8.5. The benzenesulfonate ring and five homologs of sulfophenyl carboxylate were identified as intermediates in the LAS degradation pathway. A decrease in relative growth rate and pigment contents was observed by increasing LAS concentration. In contrast, an increase in hydrogen peroxide content and electrolyte leakage indicated oxidative stress by LAS. Induction of enzymatic/non-enzymatic antioxidants was observed during the surfactant remediation process, indicating their role in overcoming free radicals generated under surfactant stress.
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Affiliation(s)
- Zahra Masoudian
- Department of Plant Sciences, Faculty of Natural Sciences, University of Tabriz, Tabriz, 5166616471, East Azerbaijan, Iran.
| | - Seyed Yahya Salehi-Lisar
- Department of Plant Sciences, Faculty of Natural Sciences, University of Tabriz, Tabriz, 5166616471, East Azerbaijan, Iran
| | - Akbar Norastehnia
- Department of Biology, Faculty of Sciences, University of Guilan, Rasht, Iran
| | - Sarieh Tarigholizadeh
- Department of Plant Sciences, Faculty of Natural Sciences, University of Tabriz, Tabriz, 5166616471, East Azerbaijan, Iran
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Treatment of petroleum wastewater by electrocoagulation using scrap perforated (Fe-anode) and plate (Al and Fe-cathode) metals: Optimization of operating parameters by RSM. Chem Eng Res Des 2022. [DOI: 10.1016/j.cherd.2022.08.048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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DEDE SAĞSÖZ Y, YILMAZ AE, EKMEKYAPAR TORUN F, KOCADAĞISTAN B, KUL S. The Investigation of COD Treatment and Energy Consumption of Urban Wastewater by a Continuous Electrocoagulation System. J ELECTROCHEM SCI TE 2022. [DOI: 10.33961/jecst.2021.00647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Barbosa Ferreira M, Sales Solano AM, Vieira dos Santos E, Martínez-Huitle CA, Ganiyu SO. Coupling of Anodic Oxidation and Soil Remediation Processes: A Review. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E4309. [PMID: 32992528 PMCID: PMC7579085 DOI: 10.3390/ma13194309] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 08/10/2020] [Accepted: 09/22/2020] [Indexed: 01/16/2023]
Abstract
In recent years, due to industrial modernization and agricultural mechanization, several environmental consequences have been observed, which make sustainable development difficult. Soil, as an important component of ecosystem and a key resource for the survival of human and animals, has been under constant contamination from different human activities. Contaminated soils and sites require remediation not only because of the hazardous threat it possess to the environment but also due to the shortage of fresh land for both agriculture and urbanization. Combined or coupled remediation technologies are one of the efficient processes for the treatment of contaminated soils. In these technologies, two or more soil remediation techniques are applied simultaneously or sequentially, in which one technique complements the other, making the treatment very efficient. Coupling anodic oxidation (AO) and soil remediation for the treatment of soil contaminated with organics has been studied via two configurations: (i) soil remediation, ex situ AO, where AO is used as a post-treatment stage for the treatment of effluents from soil remediation process and (ii) soil remediation, in situ AO, where both processes are applied simultaneously. The former is the most widely investigated configuration of the combined processes, while the latter is less common due to the greater diffusion dependency of AO as an electrode process. In this review, the concept of soil washing (SW)/soil flushing (SF) and electrokinetic as soil remediation techniques are briefly explained followed by a discussion of different configurations of combined AO and soil remediation.
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Affiliation(s)
- Maiara Barbosa Ferreira
- Instituto de Química, Universidade Federal do Rio Grande do Norte, Natal 59078-970, RN, Brazil; (M.B.F.); (A.M.S.S.); (E.V.d.S.)
| | - Aline Maria Sales Solano
- Instituto de Química, Universidade Federal do Rio Grande do Norte, Natal 59078-970, RN, Brazil; (M.B.F.); (A.M.S.S.); (E.V.d.S.)
| | - Elisama Vieira dos Santos
- Instituto de Química, Universidade Federal do Rio Grande do Norte, Natal 59078-970, RN, Brazil; (M.B.F.); (A.M.S.S.); (E.V.d.S.)
| | - Carlos A. Martínez-Huitle
- Instituto de Química, Universidade Federal do Rio Grande do Norte, Natal 59078-970, RN, Brazil; (M.B.F.); (A.M.S.S.); (E.V.d.S.)
| | - Soliu O. Ganiyu
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 2W2, Canada
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Qiu Y, Xu M, Sun Z, Li H. Remediation of PAH-Contaminated Soil by Combining Surfactant Enhanced Soil Washing and Iron-Activated Persulfate Oxidation Process. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:ijerph16030441. [PMID: 30717404 PMCID: PMC6388178 DOI: 10.3390/ijerph16030441] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 01/29/2019] [Accepted: 01/31/2019] [Indexed: 11/16/2022]
Abstract
There is increasing concern regarding soils contaminated with polycyclic aromatic hydrocarbons (PAHs). In the present study, the remediation of soil spiked with PAHs was explored by the combination of soil washing with sodium dodecyl sulfate (SDS) and subsequent oxidation through persulfate (PS) activated by Fe2+, nanoscale zero-valent iron (nZVI), and SiO₂-coated nZVI (SiO₂/nZVI). Results demonstrated that the removal of phenanthrene (PHE), fluoranthene (FLU), and pyrene (PYR) by SDS is an efficient means for soil decontamination. At SDS concentration of 20 g/L, the removal efficiencies of PHE, PYR, and FLU were 37%, 40%, and 44%, respectively. For the degradation of PAHs and SDS in the soil washing effluents, the efficiencies of PS activated with SiO₂/nZVI were not significantly different from those of PS activated with nZVI and Fe2+ (p > 0.05). In practice, SiO₂/nZVI is more preferable due to the improved antioxidation and dispersibility. At the dosage of 2 g/L (in the amount of iron) of SiO₂/nZVI, the removal efficiencies of PHE, FLU, PYR, and SDS within 30 min of treatment were 75%, 85%, 87%, and 34%, respectively. The degradation of SDS was much lower than those of PAHs, which facilitated the recycle of SDS. Our findings suggest that PS activated with SiO₂/nZVI is a promising method for the treatment of soil washing effluents containing SDS and PAHs.
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Affiliation(s)
- Yanhua Qiu
- School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China.
| | - Meilan Xu
- School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China.
| | - Zongquan Sun
- School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China.
| | - Helian Li
- School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China.
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Intensification of petroleum elimination in the presence of a surfactant using anodic electrochemical treatment with BDD anode. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2018.11.045] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Silva JF, Graça NS, Ribeiro AM, Rodrigues AE. Electrocoagulation process for the removal of co-existent fluoride, arsenic and iron from contaminated drinking water. Sep Purif Technol 2018. [DOI: 10.1016/j.seppur.2017.12.055] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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Yustres Á, López-Vizcaíno R, Sáez C, Cañizares P, Rodrigo M, Navarro V. Water transport in electrokinetic remediation of unsaturated kaolinite. Experimental and numerical study. Sep Purif Technol 2018. [DOI: 10.1016/j.seppur.2017.10.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Khan AHA, Ayaz M, Arshad M, Yousaf S, Khan MA, Anees M, Sultan A, Nawaz I, Iqbal M. Biogeochemical Cycle, Occurrence and Biological Treatments of Polycyclic Aromatic Hydrocarbons (PAHs). IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY TRANSACTION A-SCIENCE 2018. [DOI: 10.1007/s40995-017-0393-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Hu S, Li D, Huang C, Sun D, Yuan X. A continuous electrocoagulation system with pH auto-adjusting by endogenous products to treat Cr(VI)-contaminated soil flushing solution. Sep Purif Technol 2017. [DOI: 10.1016/j.seppur.2017.07.081] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Garcia-Segura S, Eiband MMS, de Melo JV, Martínez-Huitle CA. Electrocoagulation and advanced electrocoagulation processes: A general review about the fundamentals, emerging applications and its association with other technologies. J Electroanal Chem (Lausanne) 2017. [DOI: 10.1016/j.jelechem.2017.07.047] [Citation(s) in RCA: 261] [Impact Index Per Article: 37.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Linares Hernández I, Barrera Díaz C, Valdés Cerecero M, Almazán Sánchez PT, Castañeda Juárez M, Lugo Lugo V. Soft drink wastewater treatment by electrocoagulation-electrooxidation processes. ENVIRONMENTAL TECHNOLOGY 2017; 38:433-442. [PMID: 27257937 DOI: 10.1080/09593330.2016.1196740] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The aim of this work was to implement a coupled system, a monopolar Electrocoagulation (EC)-Electrooxidation (EO) processes, for the treatment of soft drink wastewater. For the EC test, Cu-Cu, anode-cathode were used at current densities of 17, 51 and 68 mA cm-2. Only 37.67% of chemical oxygen demand (COD) and 27% of total organic carbon (TOC) were removed at 20 min with an optimum pH of 8, this low efficiency can be associated with the high concentration of inorganic ions which inhibit the oxidation of organic matter due to their complexation with copper ions. Later EO treatment was performed with boron-doped diamond-Cu electrodes and a current density of 30 Am-2. The coupled EC-EO system was efficient to reduce organic pollutants from initial values of 1875 mg L-1 TOC and 4300 mg L-1 COD, the removal efficiencies were 75% and 85%, respectively. Electric energy consumption to degrade a kilogram of a pollutant in the soft drink wastewater using EC was 3.19 kWh kg-1 TOC and 6.66 kWh kg-1 COD. It was concluded that the coupled system EC-EO was effective for the soft drink wastewater treatment, reducing operating costs and residence time, and allowing its reuse in indirect contact with humans, thus contributing to the sustainable reuse as an effluent of industrial wastewater.
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Affiliation(s)
- Ivonne Linares Hernández
- a Centro Interamericano de Recursos del Agua (CIRA) , Universidad Autónoma del Estado de México , Toluca , Estado de México , México
| | - Carlos Barrera Díaz
- b Centro Conjunto de Investigación en Química Sustentable , UAEM-UNAM, Carretera Toluca-Atlacomulco , Toluca , Estado de México , México
| | - Mario Valdés Cerecero
- b Centro Conjunto de Investigación en Química Sustentable , UAEM-UNAM, Carretera Toluca-Atlacomulco , Toluca , Estado de México , México
| | - Perla Tatiana Almazán Sánchez
- a Centro Interamericano de Recursos del Agua (CIRA) , Universidad Autónoma del Estado de México , Toluca , Estado de México , México
| | - Monserrat Castañeda Juárez
- a Centro Interamericano de Recursos del Agua (CIRA) , Universidad Autónoma del Estado de México , Toluca , Estado de México , México
| | - Violeta Lugo Lugo
- c Dirección de Mecatrónica y Sistemas productivos , Universidad Tecnológica del Valle de Toluca , Lerma , Mexico
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Abstract
AbstractThe conventional coagulation technique of textile wastewater treatments is plagued with the issue of low removal rate of pollutants and generation of a large quantity of sludge. Recently, electrocoagulation (EC) technique gained immense attention due to its efficiency. The technique involves dissolution of the sacrificial anodes to provide an active metal hydroxide as a strong coagulant that destabilizes and amasses particles and then removes them by precipitation or adsorption. EC process is influenced by operating parameters such as applied current density, electrodes material and configuration, type of electrical connection, pH and conductivity of the solution, and mixing state. Consequently, this work reviewed the major and minor reactions of EC process with operational parameters, design of EC cell, mass transfer studies and modeling, and industrial wastewater applications. The work also includes comparison of EC technique with conventional coagulation and combinations with other techniques. Special emphasis is on removal of pollutants from textile wastewater. Further, the electrical energy supplies and cost analysis are also discussed. Even though several publications have covered EC process recently, no review work has treated the systematic process design and how to minimize the effect of passivation layer deposited on the surface of the electrodes. EC process with rotating electrodes has been recommended to reduce this phenomenon. The effect of electrodes geometry is considered to enhance the conductivity of the cell and reduce energy consumption. The studies of ionic mass transfer were not implemented before special by limiting current method during the EC process. Moreover, no aforementioned studies used computational fluid dynamics modeling to present the mass transfer inside the EC reactor.
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Wang Y, Lin H, Jin F, Niu J, Zhao J, Bi Y, Li Y. Electrocoagulation mechanism of perfluorooctanoate (PFOA) on a zinc anode: Influence of cathodes and anions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 557-558:542-550. [PMID: 27037875 DOI: 10.1016/j.scitotenv.2016.03.114] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 03/16/2016] [Accepted: 03/16/2016] [Indexed: 06/05/2023]
Abstract
Batch experiments were conducted to investigate the effects of cathode materials and anions (Cl(-), SO4(2-), NO3(-), and CO3(2-)/HCO3(-)) on perfluorooctanoate (PFOA) removal in electrocoagulation process using zinc anode. The results indicated that the hydroxide flocs generated in-situ in the electrocoagulation process using the stainless steel rod as cathode were more effective than those using aluminum rod as cathode for the removal of PFOA after 20min of electrocoagulation at a current density of 0.5mAcm(-2). Hydroxide flocs generated in-situ in the electrocoagulation in the presence of Cl(-)/NO3(-) could effectively remove PFOA from aqueous solution with the removal ratios of 99.7%/98.1% and 98.9%/97.3% using stainless steel rod and aluminum rod as cathode, respectively. However, the PFOA removal ratios were 96.2%/4.1% and 7.4%/4.6% using stainless steel rod and aluminum rod as cathode, respectively, in the presence of SO4(2-) and CO3(2-)/HCO3(-). The different removal ratios of PFOA during the electrocoagulation process were primarily due to the fact that the hydroxide flocs generated in-situ were different in the presence of diverse cathodes and anions. We firstly demonstrated that Zn0.70Al0.30(OH)2(CO3)0.15·xH2O and ZnO generated in-situ in the electrocoagulation process (except for CO3(2-)/HCO3(-)) using zinc anode and aluminum/stainless steel rod cathode governed the sorption of PFOA. The adsorbent hydroxide flocs in-situ generated in the presence of Cl(-) could effectively remove PFOA from aqueous solution containing CO3(2-)/HCO3(-) anion at the initial hydroxide flocs concentration of 2000mgL(-1). These results provided an effective and alternative method to remove PFOA from aqueous solution containing CO3(2-)/HCO3(-) anion.
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Affiliation(s)
- Yujuan Wang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, PR China
| | - Hui Lin
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, PR China
| | - Fangyuan Jin
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, PR China
| | - Junfeng Niu
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, PR China.
| | - Jinbo Zhao
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, PR China
| | - Ying Bi
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, PR China
| | - Ying Li
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, PR China
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Shah A, Shahzad S, Munir A, Nadagouda MN, Khan GS, Shams DF, Dionysiou DD, Rana UA. Micelles as Soil and Water Decontamination Agents. Chem Rev 2016; 116:6042-74. [PMID: 27136750 DOI: 10.1021/acs.chemrev.6b00132] [Citation(s) in RCA: 115] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Contaminated soil and water pose a serious threat to human health and ecosystem. For the treatment of industrial effluents or minimizing their detrimental effects, preventive and remedial approaches must be adopted prior to the occurrence of any severe environmental, health, or safety hazard. Conventional treatment methods of wastewater are insufficient, complicated, and expensive. Therefore, a method that could use environmentally friendly surfactants for the simultaneous removal of both organic and inorganic contaminants from wastewater is deemed a smart approach. Surfactants containing potential donor ligands can coordinate with metal ions, and thus such compounds can be used for the removal of toxic metals and organometallic compounds from aqueous systems. Surfactants form host-guest complexes with the hydrophobic contaminants of water and soil by a mechanism involving the encapsulation of hydrophobes into the self-assembled aggregates (micelles) of surfactants. However, because undefined amounts of surfactants may be released into the aqueous systems, attention must be paid to their own environmental risks as well. Moreover, surfactant remediation methods must be carefully analyzed in the laboratory before field implementation. The use of biosurfactants is the best choice for the removal of water toxins as such surfactants are associated with the characteristics of biodegradability, versatility, recovery, and reuse. This Review is focused on the currently employed surfactant-based soil and wastewater treatment technologies owing to their critical role in the implementation of certain solutions for controlling pollution level, which is necessary to protect human health and ensure the quality standard of the aquatic environment.
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Affiliation(s)
- Afzal Shah
- Department of Chemistry, Quaid-i-Azam University , Islamabad 45320, Pakistan
| | - Suniya Shahzad
- Department of Chemistry, Quaid-i-Azam University , Islamabad 45320, Pakistan
| | - Azeema Munir
- Department of Chemistry, Quaid-i-Azam University , Islamabad 45320, Pakistan
| | - Mallikarjuna N Nadagouda
- Department of Mechanical and Materials Engineering, Wright State University , Dayton, Ohio 45324, United States
| | - Gul Shahzada Khan
- Department of Chemistry, Shaheed Benazir Bhutto University , Sheringal, Dir (Upper), 18000 Khyber Pakhtunkhwa, Pakistan
| | - Dilawar Farhan Shams
- Department of Environmental Sciences, Abdul Wali Khan University Mardan , 23200 Khyber Pakhtunkhwa, Pakistan
| | - Dionysios D Dionysiou
- Environmental Engineering and Science Program, Department of Biomedical, Chemical and Environmental Engineering, University of Cincinnati , Cincinnati, Ohio 45221-0012, United States
| | - Usman Ali Rana
- Sustainable Energy Technologies Center, College of Engineering, King Saud University , PO Box 800, Riyadh 11421, Saudi Arabia
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Dos Santos EV, Sáez C, Martínez-Huitle CA, Cañizares P, Rodrigo MA. Removal of oxyfluorfen from ex-situ soil washing fluids using electrolysis with diamond anodes. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2016; 171:260-266. [PMID: 26846982 DOI: 10.1016/j.jenvman.2016.01.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2015] [Revised: 12/29/2015] [Accepted: 01/21/2016] [Indexed: 06/05/2023]
Abstract
In this research, firstly, the treatment of soil spiked with oxyfluorfen was studied using a surfactant-aided soil-washing (SASW) process. After that, the electrochemical treatment of the washing liquid using boron doped diamond (BDD) anodes was performed. Results clearly demonstrate that SASW is a very efficient approach in the treatment of soil, removing the pesticide completely by using dosages below 5 g of sodium dodecyl sulfate (SDS) per Kg of soil. After that, complete mineralization of organic matter (oxyflourfen, SDS and by-products) was attained (100% of total organic carbon and chemical oxygen demand removals) when the washing liquids were electrolyzed using BDD anodes, but the removal rate depends on the size of the particles in solution. Electrolysis of soil washing fluids occurs via the reduction in size of micelles until their complete depletion. Lower concentrations of intermediates are produced (sulfate, chlorine, 4-(trifluoromethyl)-phenol and ortho-nitrophenol) during BDD-electrolyzes. Finally, it is important to indicate that, sulfate (coming from SDS) and chlorine (coming from oxyfluorfen) ions play an important role during the electrochemical organic matter removal.
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Affiliation(s)
- Elisama Vieira Dos Santos
- Institute of Chemistry, Federal University of Rio Grande do Norte, Lagoa Nova CEP 59078-970, Natal, RN, Brazil
| | - Cristina Sáez
- 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 Andres 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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Santos EVD, Sáez C, Martínez-Huitle CA, Cañizares P, Rodrigo MA. The role of particle size on the conductive diamond electrochemical oxidation of soil-washing effluent polluted with atrazine. Electrochem commun 2015. [DOI: 10.1016/j.elecom.2015.03.003] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Huguenot D, Mousset E, van Hullebusch ED, Oturan MA. Combination of surfactant enhanced soil washing and electro-Fenton process for the treatment of soils contaminated by petroleum hydrocarbons. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2015; 153:40-47. [PMID: 25646675 DOI: 10.1016/j.jenvman.2015.01.037] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Revised: 01/21/2015] [Accepted: 01/23/2015] [Indexed: 06/04/2023]
Abstract
In order to improve the efficiency of soil washing treatment of hydrocarbon contaminated soils, an innovative combination of this soil treatment technique with an electrochemical advanced oxidation process (i.e. electro-Fenton (EF)) has been proposed. An ex situ soil column washing experiment was performed on a genuinely diesel-contaminated soil. The washing solution was enriched with surfactant Tween 80 at different concentrations, higher than the critical micellar concentration (CMC). The impact of soil washing was evaluated on the hydrocarbons concentration in the leachates collected at the bottom of the soil columns. These eluates were then studied for their degradation potential by EF treatment. Results showed that a concentration of 5% of Tween 80 was required to enhance hydrocarbons extraction from the soil. Even with this Tween 80 concentration, the efficiency of the treatment remained very low (only 1% after 24 h of washing). Electrochemical treatments performed thereafter with EF on the collected eluates revealed that the quasi-complete mineralization (>99.5%) of the hydrocarbons was achieved within 32 h according to a linear kinetic trend. Toxicity was higher than in the initial solution and reached 95% of inhibition of Vibrio fischeri bacteria measured by Microtox method, demonstrating the presence of remaining toxic compounds even after the complete degradation. Finally, the biodegradability (BOD₅/COD ratio) reached a maximum of 20% after 20 h of EF treatment, which is not enough to implement a combined treatment with a biological treatment process.
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Affiliation(s)
- David Huguenot
- Université Paris-Est, Laboratoire Géomatériaux et Environnement (EA 4508), UPEM, 77454, Marne-la-Vallée, France.
| | - Emmanuel Mousset
- Université Paris-Est, Laboratoire Géomatériaux et Environnement (EA 4508), UPEM, 77454, Marne-la-Vallée, France
| | - Eric D van Hullebusch
- Université Paris-Est, Laboratoire Géomatériaux et Environnement (EA 4508), UPEM, 77454, Marne-la-Vallée, France
| | - Mehmet A Oturan
- Université Paris-Est, Laboratoire Géomatériaux et Environnement (EA 4508), UPEM, 77454, Marne-la-Vallée, France
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Khandegar V, Saroha AK. Electrocoagulation for the treatment of textile industry effluent--a review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2013; 128:949-63. [PMID: 23892280 DOI: 10.1016/j.jenvman.2013.06.043] [Citation(s) in RCA: 217] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2012] [Revised: 04/01/2013] [Accepted: 06/24/2013] [Indexed: 05/10/2023]
Abstract
Various techniques such as physical, chemical, biological, advanced oxidation and electrochemical are used for the treatment of industrial effluent. The commonly used conventional biological treatment processes are time consuming, need large operational area and are not effective for effluent containing toxic elements. Advanced oxidation techniques result in high treatment cost and are generally used to obtain high purity grade water. The chemical coagulation technique is slow and generates large amount of sludge. Electrocoagulation has recently attracted attention as a potential technique for treating industrial effluent due to its versatility and environmental compatibility. This technique uses direct current source between metal electrodes immersed in the effluent, which causes the dissolution of electrode plates into the effluent. The metal ions, at an appropriate pH, can form wide range of coagulated species and metal hydroxides that destabilize and aggregate particles or precipitate and adsorb the dissolved contaminants. Therefore, the objective of the present manuscript is to review the potential of electrocoagulation for the treatment of industrial effluents, mainly removal of dyes from textile effluent.
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Affiliation(s)
- V Khandegar
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi-110016, India
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Surfactants: Chemistry, Toxicity and Remediation. ENVIRONMENTAL CHEMISTRY FOR A SUSTAINABLE WORLD 2013. [DOI: 10.1007/978-3-319-02387-8_5] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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