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Razavi R, Basij M, Beitollahi H, Panahandeh S. Experimental and theoretical investigation of acetamiprid adsorption on nano carbons and novel PVC membrane electrode for acetamiprid measurement. Sci Rep 2022; 12:12145. [PMID: 35840789 PMCID: PMC9287318 DOI: 10.1038/s41598-022-16459-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Accepted: 07/11/2022] [Indexed: 11/20/2022] Open
Abstract
Acetamiprid removal was investigated by synthesized Graphene oxide, multiwall nanotube and graphite from an aqueous solution. For this propose, FT-IR, XRD, UV–Vis, SEM and EDS were used to characterize the synthesized nano adsorbents and to determine the removal process. A novel PVC membrane electrode as selective electrode made for determining the concentration of acetamiprid. Batch adsorption studies were conducted to investigate the effect of temperature, initial acetamiprid concentration, adsorbent type and contact time as important adsorption parameters. The maximum equilibrium time was found to be 15 min for graphene oxide. The kinetics studies showed that the adsorption of acetamiprid followed the pseudo-second-order kinetics mechnism. All the adsorption equilibrium data were well fitted to the Langmuir isotherm model and maximum monolayer adsorption capacity 99 percent. Docking data of adsorption have resulted in the same as experimental data in good manner and confirmed the adsorption process.
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Affiliation(s)
- Razieh Razavi
- Department of Chemistry, Faculty of Science, University of Jiroft, Jiroft, Iran.
| | - Moslem Basij
- Department of Plant Protection, Faculty of Agriculture, University of Jiroft, Jiroft, Iran.
| | - Hadi Beitollahi
- Environment Department, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran
| | - Saleh Panahandeh
- Department of Plant Protection, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran
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Bennemla M, Bouafia-Chergui S, Amrane A, Chabani M. The photocatalytic degradation kinetics of the anti-inflammatory drug ibuprofen in aqueous solution under UV/TiO 2 system and neural networks modeling. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2022. [DOI: 10.1515/ijcre-2021-0170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
In this study, the kinetic degradation of the anti-inflammatory drug Ibuprofen in aqueous solution by heterogeneous TiO2 photocatalytic was investigated. The data obtained were used for training an artificial neural network. Preliminary experiments of photolysis and adsorption were carried out to assess their contribution to the photocatalytic degradation. Both, direct photolysis and adsorption of Ibuprofen are very low-efficient processes (15,83% and 23,88%, respectively). The degradation efficiency was significantly elevated with the addition of TiO2 Catalyst (>94%). The photocatalytic degradation followed a pseudo-first-order reaction according to the L-H model. The hydroxyl radicals and photo-hole (h+) were found to contribute to the Ibuprofen removal. The higher the initial concentration of Ibuprofen resulted in the lower percentage of degradation. This can be credited to the fact that the created photon and radicals were constant. The higher the initial concentration of Ibuprofen the fewer radicals were shared for each Ibuprofen molecular and so the lower percentage of degradation. The maximum photoactivity from the available light is accomplished when the concentration of catalyst reaches to 1 g/L (0.8 g), which was adopted as the optimal amounts. Compared to the removal of ibuprofen, the mineralization was relatively lower. This decrease is due to the organic content of the treated solution, which is mainly composed of recalcitrant intermediate products. The network was planned as a Levenberg-Marquardt algorithm with three layer, four neurons in the input layer, fourteen neurons in the hidden layer and one neuron in the output layer (4:14:1). The artificial neural network was trained until the MSE value between the simulated data and the experimental results was 10−5. The best results (R
2 = 0.999 and MSE = 1.5 × 10−4) were obtained with a log sigmoid transfer function at hidden layer and a linear transfer function at output layer.
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Affiliation(s)
- M. Bennemla
- Laboratoire Génie de la réaction, Equipe Procédés durables de dépollution, Faculté de Génie des Procédés et Génie Mécanique , U.S.T.H.B. BP 32 , El Allia , Babezzouar , Algeria
| | - S. Bouafia-Chergui
- Laboratoire Génie de la réaction, Equipe Procédés durables de dépollution, Faculté de Génie des Procédés et Génie Mécanique , U.S.T.H.B. BP 32 , El Allia , Babezzouar , Algeria
| | - A. Amrane
- Ecole Nationale Supérieure de Chimie de Rennes, CNRS , UMR 6226 , 11 allée de Beaulieu , CS 50837 , 35708 , Rennes , France
- Université Européenne de Bretagne , 5 boulevard Laënnec , 35000 , Rennes , France
| | - M. Chabani
- Laboratoire Génie de la réaction, Equipe Procédés durables de dépollution, Faculté de Génie des Procédés et Génie Mécanique , U.S.T.H.B. BP 32 , El Allia , Babezzouar , Algeria
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Moradeeya PG, Sharma A, Kumar MA, Basha S. Titanium dioxide based nanocomposites - Current trends and emerging strategies for the photocatalytic degradation of ruinous environmental pollutants. ENVIRONMENTAL RESEARCH 2022; 204:112384. [PMID: 34785207 DOI: 10.1016/j.envres.2021.112384] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 11/07/2021] [Accepted: 11/10/2021] [Indexed: 06/13/2023]
Abstract
Many ruinous pollutants are omnipresent in the environment and among them; pesticides are xenobiotic and pose to be a bio-recalcitrance. Their detrimental ecological and environmental impacts attract attention of environmental excerpts and the surge of stringent regulations have endows the need of a technically feasible treatment. This critical review emphasizes about the occurrence, abundance and fate of structurally distinct pesticides in different environment. The practiced remedial strategies and in particular, the advanced oxidation processes (AOPs) those utilize the photo-catalytic properties of nano-composites for the degradation of pollutants are critically discussed. Photo-catalytic degradation utilizes many composite materials at nano-scale level, wherein synthesis of nano-composites with appropriate precursors and other adjoining functional moieties are of prime importance. Therefore, suitable starter materials along with the reaction conditions are prerequisite for effectively tailoring the nano-composites. The aforementioned aspects and their customized applications are critically discussed. The associated challenges, opportunities and process economics of degradation using photo-catalytic AOP techniques are highlighted and in addition, the review tries to explain how best the photo-degradation can be a stand-alone tool with a societal importance. Conclusively, the future prospects for undertaking new researches in photo-catalytic breakdown of pollutants that can be judiciously sustainable.
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Affiliation(s)
- Pareshkumar G Moradeeya
- Hyderabad Zonal Laboratory, CSIR-National Environmental Engineering Research Institute, IICT Campus, Tarnaka, Hyderabad, 500 007, Telangana, India; Department of Environmental Science & Engineering, Marwadi Education Foundation, Rajkot, 360 003, Gujarat, India
| | - Archana Sharma
- Department of Environmental Science & Engineering, Marwadi Education Foundation, Rajkot, 360 003, Gujarat, India
| | - Madhava Anil Kumar
- Analytical and Environmental Science Division & Centralized Instrument Facility, CSIR-Central Salt & Marine Chemicals Research Institute, Bhavnagar, 364 002, Gujarat, India
| | - Shaik Basha
- Hyderabad Zonal Laboratory, CSIR-National Environmental Engineering Research Institute, IICT Campus, Tarnaka, Hyderabad, 500 007, Telangana, India.
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Ambreen S, Yasmin A. Novel metabolites of triazophos formed during degradation by bacterial strains Pseudomonas kilonensis MB490 , Pseudomonas kilonensis MB498 and pseudomonas sp. MB504 isolated from cotton fields. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2020; 55:1106-1113. [PMID: 32990183 DOI: 10.1080/03601234.2020.1823171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In the current scenario of overuse of pesticides (resulting in soil and water pollution and ultimately leading to biomagnification), a research project was carried out to study biodegradation of Triazophos. For this purpose, three bacterial strains (Pseudomonas kilonensis MB490, Pseudomonas kilonensis MB498 and Pseudomonas sp. MB504), isolated from cotton fields of Mianwali, Pakistan were investigated for Triazophos degradation and metabolite formation in M-9 broth, soil slurry and soil microcosm after incubation for 9 days. There was 88.4-95.8% Triazophos degradation in M-9 broth, 99.90% degradation in soil slurry and 92.74 to 96% Triazophos degradation in soil microcosm by these bacteria after 9 days. While there was negligible Triazophos degradation (upto 7%) in the controls without bacteria. According to GCMS analysis, 7 unique and novel metabolites (1, 2, 4-Triazole-4-amine, N-(2-Thienylmethyl), Benzene sulfonic acid hydrazide, Benzene sulfonic acid methyl ester, 4H-1,2,4-Triazole-4-benzenesulfonamide, 4, 5 dihydro-N-(O-toyl)-3-furamide, Ethyl 4-phenyldiazenylbenzoate and Dibutyl methanephosphonate) of Triazophos were revealed. Current results strongly suggest the potential of these bacterial strains for the remediation of Triazophos contaminated agricultural soils.
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Affiliation(s)
- Samina Ambreen
- Microbiology & Biotechnology Research Lab, Department of Biotechnology, Fatima Jinnah Women University, Rawalpindi, Pakistan
| | - Azra Yasmin
- Microbiology & Biotechnology Research Lab, Department of Biotechnology, Fatima Jinnah Women University, Rawalpindi, Pakistan
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Wu Q, Wu P, Duan H, Liu B, Shao Y, Li P, Zhang C, Xiong Y. Quantum dot bead-based immunochromatographic assay for the quantitative detection of triazophos. FOOD AGR IMMUNOL 2019. [DOI: 10.1080/09540105.2019.1649638] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Affiliation(s)
- Qin Wu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, People’s Republic of China
- Key Lab of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Key Laboratory of Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, People’s Republic of China
| | - Peiman Wu
- The Affiliated Hospital of Xuzhou Medical University, Xuzhou, People’s Republic of China
| | - Hong Duan
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, People’s Republic of China
| | - Beibei Liu
- Key Lab of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Key Laboratory of Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, People’s Republic of China
| | - Yanna Shao
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, People’s Republic of China
| | - Pan Li
- Key Lab of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Key Laboratory of Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, People’s Republic of China
| | - Cunzheng Zhang
- Key Lab of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Key Laboratory of Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, People’s Republic of China
- School of Food and Biological Engineering, Jiangshu University, Zhenjiang, People’s Republic of China
| | - Yonghua Xiong
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, People’s Republic of China
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Wani AA, Dar AA, Jan I, Sofi KA, Sofi JA, Dar IH. Dissipation, risk assessment, half‐life period and method validation of carbendazim and triazophos in green pea by high‐performance liquid chromatography. SEPARATION SCIENCE PLUS 2019. [DOI: 10.1002/sscp.201800143] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ashraf A. Wani
- Research Centre for Residue and Quality AnalysisSher‐e‐Kashmir University of Agricultural Sciences and Technology (SKUAST‐K)Shalimar Campus Srinagar J&K India
| | - Alamgir A. Dar
- Research Centre for Residue and Quality AnalysisSher‐e‐Kashmir University of Agricultural Sciences and Technology (SKUAST‐K)Shalimar Campus Srinagar J&K India
| | - Ishrat Jan
- Research Centre for Residue and Quality AnalysisSher‐e‐Kashmir University of Agricultural Sciences and Technology (SKUAST‐K)Shalimar Campus Srinagar J&K India
| | - Khurshid A. Sofi
- Research Centre for Residue and Quality AnalysisSher‐e‐Kashmir University of Agricultural Sciences and Technology (SKUAST‐K)Shalimar Campus Srinagar J&K India
| | - Javid A. Sofi
- Research Centre for Residue and Quality AnalysisSher‐e‐Kashmir University of Agricultural Sciences and Technology (SKUAST‐K)Shalimar Campus Srinagar J&K India
| | - Irshad H. Dar
- Research Centre for Residue and Quality AnalysisSher‐e‐Kashmir University of Agricultural Sciences and Technology (SKUAST‐K)Shalimar Campus Srinagar J&K India
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Kanan S, Moyet MA, Arthur RB, Patterson HH. Recent advances on TiO2-based photocatalysts toward the degradation of pesticides and major organic pollutants from water bodies. CATALYSIS REVIEWS-SCIENCE AND ENGINEERING 2019. [DOI: 10.1080/01614940.2019.1613323] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Sofian Kanan
- Department of Biology, Chemistry & Environmental Sciences, American University of Sharjah, Sharjah, United Arab Emirates
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Photocatalytic Degradation of Profenofos and Triazophos Residues in the Chinese Cabbage, Brassica chinensis, Using Ce-Doped TiO2. Catalysts 2019. [DOI: 10.3390/catal9030294] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Pesticides have revolutionized the modern day of agriculture and substantially reduced crop losses. Synthetic pesticides pose a potential risk to the ecosystem and to the non-target organisms due to their persistency and bioaccumulation in the environment. In recent years, a light-mediated advanced oxidation processes (AOPs) has been adopted to resolve pesticide residue issues in the field. Among the current available semiconductors, titanium dioxide (TiO2) is one of the most promising photocatalysts. In this study, we investigated the photocatalytic degradation of profenofos and triazophos residues in Chinese cabbage, Brassica chinensis, using a Cerium-doped nano semiconductor TiO2 (TiO2/Ce) under the field conditions. The results showed that the degradation efficiency of these organophosphate pesticides in B. chinensis was significantly enhanced in the presence of TiO2/Ce. Specifically, the reactive oxygen species (ROS) contents were significantly increased in B. chinensis with TiO2/Ce treatment, accelerating the degradation of profenofos and triazophos. Ultra-performance liquid chromatography–mass spectroscopy (UPLC-MS) analysis detected 4-bromo-2-chlorophenol and 1-phenyl-3-hydroxy-1,2,4-triazole, the major photodegradation byproducts of profenofos and triazophos, respectively. To better understand the relationship between photodegradation and the molecular structure of these organophosphate pesticides, we investigated the spatial configuration, the bond length and Mulliken atomic charge using quantum chemistry. Ab initio analysis suggests that the bonds connected by P atom of profenofos/triazophos are the initiation cleavage site for photocatalytic degradation in B. chinensis.
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Jawale RH, Gogate PR. Combined treatment approaches based on ultrasound for removal of triazophos from wastewater. ULTRASONICS SONOCHEMISTRY 2018; 40:89-96. [PMID: 28237270 DOI: 10.1016/j.ultsonch.2017.02.019] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 02/13/2017] [Accepted: 02/14/2017] [Indexed: 05/13/2023]
Abstract
Pesticides have been the major contributors to the growth of agricultural productivity, but the wide spread use in the fields and discharge from the manufacturing industries have also contributed to environmental concerns. In the present work, degradation of triazophos (O,O-diethyl-O-(1-phenyl-1H-1,2,4-triazol-3-yl) phosphorothioate) as a model pollutant has been investigated using high volume continuous ultrasonic flow cell for the first time. Effect of power dissipation and initial pH on the extent of triazophos degradation using acoustic cavitation has been investigated initially. Under the optimized set of operating power dissipation and pH, effect of addition of hydrogen peroxide (ratio of C12H16N3O3PS (Triazophos):H2O2 over the range of 1:1-1:5), ozone (over the flow rate of 100-400mg/h) and Fenton's reagent (C12H16N3O3PS:FeSO4:H2O2 ratio over the range of 1:1:1-1:4:4) has been investigated as possible process intensification strategy. Combined operation of US with H2O2 and Ozone resulted in 48.6% and 54.6% triazophos degradation respectively whereas combination of US and Fenton's reagent resulted in maximum degradation as 92.2% and also resulted in maximum COD removal as 88.5%. The study also focused on identification of intermediate products formed during the degradation as well as establishing the kinetic rate constants and the synergistic index for different approaches. The study has established that cavitation can be effectively used for triazophos degradation with significant intensification benefits based on the use of combination approach.
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Affiliation(s)
- Rajashree H Jawale
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 40019, India
| | - Parag R Gogate
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 40019, India.
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Angthararuk D, Harir M, Schmitt-Kopplin P, Sutthivaiyakit S, Kettrup A, Sutthivaiyakit P. Degradation products of profenofos as identified by high-field FTICR mass spectrometry: Isotopic fine structure approach. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2017; 52:10-22. [PMID: 27628767 DOI: 10.1080/03601234.2016.1224696] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
This study was performed to identify the degradation products of profenofos "a phenyl organothiophosphate insecticide" in raw water (RW) collected from the entry point of Metropolitan Water Works Authority "Bangkaen, Thailand" and ultrapure water (UPW) with and without TiO2 under simulated sunlight irradiation. Degradation of profenofos was followed with ultrahigh performance liquid chromatography (UHPLC) and follows pseudo first-order kinetic. Accordingly, high-field FTICR mass spectrometry coupled to an electrospray ionization source was used to reveal the degradation routes of profenofos and the isotopic fine structures (IFS) elucidations to approve the chemical structures of its degradation products. More degradation products were detected in UPW as compared to RW. Consequently, two main degradation pathways namely (i) interactive replacements of bromine and hydrogen by hydroxyl functional groups and (ii) rupture of PO, PS, CBr and CCl bonds were observed. None interactive replacement of chlorine by hydroxyl functional group was detected. Accordingly, mechanistical pathways of the main degradation products were established.
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Affiliation(s)
- Dusit Angthararuk
- a Department of Chemistry and Center of Excellence for Innovation in Chemistry , Faculty of Science, Kasetsart University , Bangkok , Thailand
- b Department of Chemistry , Faculty of Science and Technology, Suan Dusit Rajabhat University , Bangkok , Thailand
| | - Mourad Harir
- c Research Unit Analytical BioGeoChemistry , Helmholtz Zentrum München , Neuherberg , Germany
- d Chair Analyt Food Chemistry, Technische Universität München , Freising Weihenstephan , Germany
| | - Philippe Schmitt-Kopplin
- c Research Unit Analytical BioGeoChemistry , Helmholtz Zentrum München , Neuherberg , Germany
- d Chair Analyt Food Chemistry, Technische Universität München , Freising Weihenstephan , Germany
| | - Somyote Sutthivaiyakit
- e Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science , Ramkhamhaeng University , Bangkok , Thailand
| | | | - Pakawadee Sutthivaiyakit
- a Department of Chemistry and Center of Excellence for Innovation in Chemistry , Faculty of Science, Kasetsart University , Bangkok , Thailand
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Tang X, Yang Y, Tao R, Chen P, Dai Y, Jin C, Feng X. Fate of mixed pesticides in an integrated recirculating constructed wetland (IRCW). THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 571:935-942. [PMID: 27496077 DOI: 10.1016/j.scitotenv.2016.07.079] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Revised: 07/06/2016] [Accepted: 07/12/2016] [Indexed: 06/06/2023]
Abstract
In this study, three model integrated recirculating constructed wetlands (IRCWs) planted with and without Cyperus alternifolius were used to investigate their ability to remove four pesticides (chlorpyrifos, endosulfan, fenvalerate, diuron). Iron (Fe)-impregnated biochar produced by Cyperus alternifolius was added as a primary substrate. Results showed that all four pesticides were efficiently removed in the three IRCWs. The highest pesticide removals were achieved when Fe-impregnated biochar was added to the IRCW (99%), followed by the planted (64-99%) and plant-free IRCW (45-99%). The removal of pesticides in IRCWs followed first-order kinetics, with half-lives of 1.5-11.6h. A mass balance study revealed that sorption (32.2-98.6%) and microbial degradation (1.3-52.8%) were the main removal processes in all IRCWs. This study suggests that the IRCW is a promising system to treat pesticide-contaminated water, and plant and Fe-impregnated biochar can enhance pesticide removal.
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Affiliation(s)
- Xiaoyan Tang
- Institute of Hydrobiology, Jinan University, Guangzhou 510632, China
| | - Yang Yang
- Institute of Hydrobiology, Jinan University, Guangzhou 510632, China; Engineering Research Center of Tropical and Subtropical Aquatic Ecological Engineering, Ministry of Education, Guangzhou, China.
| | - Ran Tao
- Institute of Hydrobiology, Jinan University, Guangzhou 510632, China
| | - Peijun Chen
- Institute of Hydrobiology, Jinan University, Guangzhou 510632, China
| | - Yunv Dai
- Institute of Hydrobiology, Jinan University, Guangzhou 510632, China
| | - Congcong Jin
- Institute of Hydrobiology, Jinan University, Guangzhou 510632, China
| | - Xu Feng
- Institute of Hydrobiology, Jinan University, Guangzhou 510632, China
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12
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Adsorption of bentazon on activated carbon prepared from Lawsonia inermis wood: Equilibrium, kinetic and thermodynamic studies. ARAB J CHEM 2016. [DOI: 10.1016/j.arabjc.2012.04.047] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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13
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Bajeer MA, Mallah MA, Sherazi STH, Bhanger MI, Nizamani SM. Investigation of Dissipation, Adsorption, Degradation, and Leaching of Triazophos Pesticide in Various Soils. Polycycl Aromat Compd 2015. [DOI: 10.1080/10406638.2014.964424] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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14
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Gogate PR, Patil PN. Combined treatment technology based on synergism between hydrodynamic cavitation and advanced oxidation processes. ULTRASONICS SONOCHEMISTRY 2015; 25:60-69. [PMID: 25190647 DOI: 10.1016/j.ultsonch.2014.08.016] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Accepted: 08/13/2014] [Indexed: 06/03/2023]
Abstract
The present work highlights the novel approach of combination of hydrodynamic cavitation and advanced oxidation processes for wastewater treatment. The initial part of the work concentrates on the critical analysis of the literature related to the combined approaches based on hydrodynamic cavitation followed by a case study of triazophos degradation using different approaches. The analysis of different combinations based on hydrodynamic cavitation with the Fenton chemistry, advanced Fenton chemistry, ozonation, photocatalytic oxidation, and use of hydrogen peroxide has been highlighted with recommendations for important design parameters. Subsequently degradation of triazophos pesticide in aqueous solution (20 ppm solution of commercially available triazophos pesticide) has been investigated using hydrodynamic cavitation and ozonation operated individually and in combination for the first time. Effect of different operating parameters like inlet pressure (1-8 bar) and initial pH (2.5-8) have been investigated initially. The effect of addition of Fenton's reagent at different loadings on the extent of degradation has also been investigated. The combined method of hydrodynamic cavitation and ozone has been studied using two approaches of injecting ozone in the solution tank and at the orifice (at the flow rate of 0.576 g/h and 1.95 g/h). About 50% degradation of triazophos was achieved by hydrodynamic cavitation alone under optimized operating parameters. About 80% degradation of triazophos was achieved by combination of hydrodynamic cavitation and Fenton's reagent whereas complete degradation was achieved using combination of hydrodynamic cavitation and ozonation. TOC removal of 96% was also obtained for the combination of ozone and hydrodynamic cavitation making it the best treatment strategy for removal of triazophos.
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Affiliation(s)
- Parag R Gogate
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 40019, India.
| | - Pankaj N Patil
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 40019, India
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Angthararuk D, Sutthivaiyakit P, Blaise C, Gagné F, Sutthivaiyakit S. Photo-catalysis of bromacil under simulated solar light using Au/TiO₂: evaluation of main degradation products and toxicity implications. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:1468-1479. [PMID: 25163558 DOI: 10.1007/s11356-014-3425-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Accepted: 08/07/2014] [Indexed: 06/03/2023]
Abstract
Bromacil (5-bromo-3-sec-butyl-6-methyluracil) is a substituted uracil herbicide used worldwide. It is not readily biodegradable and has the potential to contaminate different types of water bodies with possible impact on diverse non-target species. In this work, degradation of bromacil in aqueous Au/TiO2 suspension under simulated sunlight allowed fourteen degradation products to be identified. The photodegradation of bromacil followed (pseudo) first order kinetics in the presence of 0.2 g L(-1) of Au/TiO2 with a half-life of 25.66 ± 1.60 min and a rate constant of 0.0271 ± 0.0023 min(-1). Transformation routes of the photo-catalytic degradation of bromacil were then proposed. Complementary toxicity assessment of the treated bromacil solution revealed a marked decrease in toxicity, thereby confirming that by-products formed would be less harmful from an environmental point of view. Photo-catalytic degradation of bromacil thus appears to hold promise as a cost-effective treatment technology to diminish the presence of this herbicide in aquatic systems.
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Affiliation(s)
- Dusit Angthararuk
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Kasetsart University, Bangkok, 10903, Thailand
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Naushad M, ALOthman Z, Khan M, ALQahtani N, ALSohaimi I. Equilibrium, kinetics and thermodynamic studies for the removal of organophosphorus pesticide using Amberlyst-15 resin: Quantitative analysis by liquid chromatography–mass spectrometry. J IND ENG CHEM 2014. [DOI: 10.1016/j.jiec.2014.02.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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17
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Zhu B, Gong YX, Liu L, Li DL, Wang Y, Ling F, Wang GX. Toxic effects of triazophos on rare minnow (Gobiocypris rarus) embryos and larvae. CHEMOSPHERE 2014; 108:46-54. [PMID: 24875911 DOI: 10.1016/j.chemosphere.2014.03.036] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Revised: 02/25/2014] [Accepted: 03/08/2014] [Indexed: 06/03/2023]
Abstract
Triazophos (TAP) has been widely used in agriculture for controlling insect pests and is a known organophosphorus pesticide. Due to TAP characteristics, such as high chemical and photochemical stability, its potential toxicity to aquatic organisms has gained great interest. To explore the potential developmental toxicity of TAP, Gobiocypris rarus embryos and larvae were exposed to various concentrations of TAP (0.1-15 mg L(-1)) until 72 h. Results showed that values of 72 h LC50 and EC50 were 7.44 and 5.60 mg L(-1) for embryos, 2.52 and 1.37 mg L(-1) for larvae. Increased malformation, decreased heart rate and body length provide a gradual concentration-dependent pattern. Enzyme activities and mRNA levels were significantly changed even at low concentration (0.05 mg L(-1) for embryos and 0.01 mg L(-(1) for larvae). Overall, the present study points out that TAP is likely a risk to the early development of G. rarus. The information presented in this study will be helpful in better understanding the toxicity induced by TAP in fish embryos and larvae.
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Affiliation(s)
- Bin Zhu
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yu-Xin Gong
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Lei Liu
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Dong-Liang Li
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yuan Wang
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Fei Ling
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Gao-Xue Wang
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China.
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18
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Comparative study on photocatalytic degradation of methomyl and parathion over UV-irradiated TiO2 particles in aqueous solutions. J Taiwan Inst Chem Eng 2014. [DOI: 10.1016/j.jtice.2013.09.025] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Dehghani M, Nasseri S, Karamimanesh M. Removal of 2,4-Dichlorophenolyxacetic acid (2,4-D) herbicide in the aqueous phase using modified granular activated carbon. JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE & ENGINEERING 2014; 12:28. [PMID: 24410737 PMCID: PMC3895795 DOI: 10.1186/2052-336x-12-28] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2013] [Accepted: 11/19/2013] [Indexed: 05/24/2023]
Abstract
BACKGROUND Low cost 2,4-Dichlorophenolyxacetic acid (2,4-D) widely used in controlling broad-leafed weeds is frequently detected in water resources. The main objectives of this research were focused on evaluating the feasibility of using granular activated carbon modified with acid to remove 2,4-D from aqueous phase, determining its removal efficiency and assessing the adsorption kinetics. RESULTS The present study was conducted at bench-scale method. The influence of different pH (3-9), the effect of contact time (3-90 min), the amount of adsorbent (0.1-0.4 g), and herbicide initial concentration (0.5-3 ppm) on 2,4-D removal efficiency by the granular activated carbon were investigated. Based on the data obtained in the present study, pH of 3 and contact time of 60 min is optimal for 2,4-D removal. 2,4-D reduction rate increased rapidly by the addition of the adsorbent and decreased by herbicide initial concentration (63%). The percent of 2,4-D reduction were significantly enhanced by decreasing pH and increasing the contact time. The adsorption of 2,4-D onto the granular activated carbon conformed to Langmuir and Freundlich models, but was best fitted to type II Langmuir model (R2 = 0.999). The second order kinetics was the best for the adsorption of 2,4-D by modified granular activated carbon with R2 > 0.99. Regression analysis showed that all of the variables in the process have been statistically significant effect (p < 0.001). CONCLUSIONS In conclusion, granular activated carbon modified with acid is an appropriate method for reducing the herbicide in the polluted water resources.
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Affiliation(s)
- Mansooreh Dehghani
- Department of Environmental Health Engineering, School of Health, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Simin Nasseri
- Department of Environmental Health Engineering, School of Public Health, and Center for Water Quality Research, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran
| | - Mojtaba Karamimanesh
- Department of Environmental Health Engineering, School of Health, Shiraz University of Medical Sciences, Shiraz, Iran
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Abd El-Mohdy HL, Hegazy EA, El-Nesr EM, El-Wahab MA. Removal of Some Pesticides from Aqueous Solutions using PVP/(AAc-co-Sty) Hydrogels Prepared by Gamma Radiation. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2012. [DOI: 10.1080/10601325.2012.714325] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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22
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Tang M, You M. Isolation, identification and characterization of a novel triazophos-degrading Bacillus sp. (TAP-1). Microbiol Res 2011; 167:299-305. [PMID: 22104481 DOI: 10.1016/j.micres.2011.10.004] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2011] [Revised: 10/22/2011] [Accepted: 10/24/2011] [Indexed: 11/29/2022]
Abstract
A novel triazophos-degrading Bacillus sp., TAP-1, was isolated from sewage sludge in a wastewater treating system of organophosphorus pesticide produced by Funong Group Co. in Jianou, Fujian, southeastern China. The isolate is a gram-positive and rod-shaped bacterium capable of hydrolyzing insecticide triazophos and was identified as a strain of Bacillus using polyphasic taxonomy combined with analysis of the morphological and physio-biochemical properties. TAP-1 could degrade triazophos through co-metabolism. When fed with nutrients such as yeast extract, peptone and glucose, TAP-1 could degrade 98.5% of TAP in the medium (100 mg/l) within 5 days. The optimal pH and temperature for the degradation were 6.5-8 and 32°C, respectively. An enzyme distribution experiment showed that the enzyme responsible for TAP degradation appeared to be intracellular.
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Affiliation(s)
- Mingqiang Tang
- Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
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23
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Chusaksri S, Lomda J, Saleepochn T, Sutthivaiyakit P. Photocatalytic degradation of 3,4-dichlorophenylurea in aqueous gold nanoparticles-modified titanium dioxide suspension under simulated solar light. JOURNAL OF HAZARDOUS MATERIALS 2011; 190:930-937. [PMID: 21546159 DOI: 10.1016/j.jhazmat.2011.04.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2010] [Revised: 03/29/2011] [Accepted: 04/05/2011] [Indexed: 05/30/2023]
Abstract
The TiO(2) modified with nanosized gold particles was prepared by deposition-precipitation at pH 7 and calcination in air at various temperatures up to 973 K. The materials were characterized by transmission electron microscope, X-ray diffraction spectrometry, and atomic absorption spectroscopy. The highest photocatalytic efficiency was obtained at the calcination temperature of 873 K. The decrease in 3,4-dichlorophenylurea concentration follows first order kinetics with a half life of 36.6 ± 2.0 min in 100 mg L(-1) of 0.83 wt% Au/TiO(2). Fifteen degradation products were identified using LC/MS/MS and IC. Degradation pathway was proposed on the basis of the observed transformation products.
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Affiliation(s)
- S Chusaksri
- Chemistry Department and Center of Excellence for Innovation in Chemistry, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
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Identification of the biochemical degradation pathway of triazophos and its intermediate in Diaphorobacter sp. TPD-1. Curr Microbiol 2011; 62:1294-301. [PMID: 21212954 DOI: 10.1007/s00284-010-9859-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2010] [Accepted: 12/16/2010] [Indexed: 10/18/2022]
Abstract
Triazophos is one of the most widely used organophosphorus insecticides usually detectable in the environment. A bacterial strain, Diaphorobacter sp. TPD-1, capable of using triazophos and its intermediate, 1-phenyl-3-hydroxy-1,2,4-triazole (PHT), as its sole carbon sources for growth was isolated from a triazophos-contaminated soil in China. This strain could completely degrade 50 mg l(-1) triazophos and PHT to non-detectable level in 24 and 56 h, respectively. During PHT degradation, three metabolites were detected and identified based on tandem mass spectrometry (MS/MS) analysis. Using this information, a biochemical degradation pathway of triazophos by Diaphorobacter sp. TPD-1 was proposed. The first step involved in the degradation of triazophos is the hydrolysis of the P-O ester bond of triazophos to form PHT and o,o-diethyl phosphorothioic acid, then the triazol ring of PHT is subsequently cleaved to form (E)-1-formyl-2-phenyldiazene. Subsequently, (E)-1-formyl-2-phenyldiazene is transformed to 2-phenylhydrazinecarboxylic acid by adding one molecular of H(2)O. Finally, the carboxyl group of 2-phenylhydrazinecarboxylic acid is decarboxylated to form phenylhydrazine.
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Photocatalytic Degradation of Water Pollutants Using Nano-TiO2. ENERGY EFFICIENCY AND RENEWABLE ENERGY THROUGH NANOTECHNOLOGY 2011. [DOI: 10.1007/978-0-85729-638-2_19] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Ahmad T, Rafatullah M, Ghazali A, Sulaiman O, Hashim R, Ahmad A. Removal of pesticides from water and wastewater by different adsorbents: a review. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART C, ENVIRONMENTAL CARCINOGENESIS & ECOTOXICOLOGY REVIEWS 2010; 28:231-271. [PMID: 21069614 DOI: 10.1080/10590501.2010.525782] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
In this review article, the use of various low-cost adsorbents for the removal of pesticides from water and wastewater has been reviewed. Pesticides may appear as pollutants in water sources, having undesirable impacts to human health because of their toxicity, carcinogenicity, and mutagenicity or causing aesthetic problems such as taste and odors. These pesticides pollute the water stream and it can be removed very effectively using different low-cost adsorbents. It is evident from a literature survey of about 191 recently published papers that low-cost adsorbents have demonstrated outstanding removal capabilities for pesticides.
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Affiliation(s)
- Tanweer Ahmad
- School of Industrial Technology, Universiti Sains Malaysia, Malaysia
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ZHAO X, LI Y, ZHANG H, NI Y, CHEN J. Applications of chromatography-mass spectrometry for the analysis of emerging organic pollutants. Se Pu 2010; 28:435-41. [DOI: 10.3724/sp.j.1123.2010.00435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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28
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Salman JM, Hameed BH. Effect of preparation conditions of oil palm fronds activated carbon on adsorption of bentazon from aqueous solutions. JOURNAL OF HAZARDOUS MATERIALS 2010; 175:133-137. [PMID: 19879687 DOI: 10.1016/j.jhazmat.2009.09.139] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2009] [Revised: 09/26/2009] [Accepted: 09/28/2009] [Indexed: 05/28/2023]
Abstract
Oil palm fronds (OPF) were used to prepare activated carbon (PFAC) using physiochemical activation method, which consisted of potassium hydroxide (KOH) treatment and carbon dioxide gasification. The effects of the preparation variables, which were activation temperature, activation time and chemical impregnation ratios (KOH: char by weight), on the carbon yield and bentazon removal were investigated. Based on the central composite design (CCD), two factor interaction (2FI) and quadratic models were, respectively, employed to correlate the PFAC preparation variables to the bentazon removal and carbon yield. From the analysis of variance (ANOVA), the most influential factor on each experimental design response was identified. The optimum conditions for preparing activated carbon from OPF were found as follows: activation temperature of 850 degrees C, activation time of 1h and KOH:char ratio of 3.75:1. The predicted and experimental results for removal of bentazon and yield of PFAC were 99.85%, 20.5 and 98.1%, 21.6%, respectively.
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Affiliation(s)
- J M Salman
- School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia
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29
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Ignatowicz K. Selection of sorbent for removing pesticides during water treatment. JOURNAL OF HAZARDOUS MATERIALS 2009; 169:953-957. [PMID: 19446393 DOI: 10.1016/j.jhazmat.2009.04.061] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2008] [Revised: 04/09/2009] [Accepted: 04/13/2009] [Indexed: 05/27/2023]
Abstract
This paper presents research on phenoxyacid pesticides removal using sorption methods on activated carbons. It was noted, that physico-chemical properties of adsorbent and adsorbate as well as parameters of the process have influence on adsorption of pesticides, derivatives of phenoxyacetic acid on carbon. The experimental data were analyzed by the Freundlich isotherm. The best for remove from water on carbon NP-5 was 2,4-D. Equilibrium data fitted well with the Freundlich model with maximum adsorption capacity of NP-5 carbon. The exemplary sorption capacity at equilibrium concentration 10 mg L(-1) were: 2,4-D 70 mg g(-1), MCPA 2 mg g(-1), MCPP 0.5 mg g(-1). The results indicated that coconut shell-based NP-5 carbon is most effective for the adsorption of phenoxyacetic acid from aqueous solutions.
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Affiliation(s)
- Katarzyna Ignatowicz
- Department of Engineering and Environment Protection Technology, Technical University Białystok, 15-351 Białystok, Poland.
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30
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Li R, Yang C, Chen H, Zeng G, Yu G, Guo J. Removal of triazophos pesticide from wastewater with Fenton reagent. JOURNAL OF HAZARDOUS MATERIALS 2009; 167:1028-1032. [PMID: 19233558 DOI: 10.1016/j.jhazmat.2009.01.090] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2008] [Revised: 01/21/2009] [Accepted: 01/22/2009] [Indexed: 05/27/2023]
Abstract
The catalytic oxidation of triazophos pesticide from wastewater using Fenton reagent was investigated at bench-scale in this study. Synthesized wastewater and actual industrial triazophos pesticide wastewater taken from a pesticide company were examined sequentially. The COD values of the synthesized and actual industrial triazophos pesticide wastewater samples were 3242 and 3418 mg/L, respectively, and the triazophos concentration in these wastewater samples was 0.06% by weight. The effects of reaction conditions including the dosages of FeSO(4).7H(2)O and H(2)O(2), the pH value of the environment, and the stirring time on COD removal from the synthesized wastewater were evaluated, and COD removal efficiency of 96.3% with a corresponding effluent COD value of 120 mg/L was achieved under optimal reaction conditions of a pH value of 4, a dosage of 2.5 g/L of FeSO(4).7H(2)O and 100 mL/L of 30% H(2)O(2) solution, and a stirring time of 90 min. Results also showed that 71.2% of nitrogen and 68.5% of phosphorous in the synthesized triazophos wastewater were converted to NO(3)(-) and PO(4)(3-), respectively, at the optimal reaction condition. When the actual industrial wastewater was treated at a pH value of 4, COD removal efficiency of 85.4% with a corresponding effluent COD value of 499 mg/L were reached at optimal condition of a dosage of 5.0 g/L of FeSO(4).7H(2)O and 75 mL/L of 30% H(2)O(2) solution, and a stirring time of 90 min. The results of this study can be referred for the design of a treatment process for the actual industrial triazophos wastewater.
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Affiliation(s)
- Rongxi Li
- Department of Biological Engineering and Environmental Science, Changsha University, Changsha, Hunan, China
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Hameed BH, Salman JM, Ahmad AL. Adsorption isotherm and kinetic modeling of 2,4-D pesticide on activated carbon derived from date stones. JOURNAL OF HAZARDOUS MATERIALS 2009; 163:121-126. [PMID: 18667269 DOI: 10.1016/j.jhazmat.2008.06.069] [Citation(s) in RCA: 181] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2008] [Revised: 06/18/2008] [Accepted: 06/18/2008] [Indexed: 05/26/2023]
Abstract
In this work, the adsorption of 2,4-dichlorophenoxyacetic acid (2,4-D) on activated carbon derived from date stones (DSAC) was studied with respect to pH and initial 2,4-D concentration. The experimental data were analyzed by the Freundlich isotherm, the Langmuir isotherm, and the Temkin isotherm. Equilibrium data fitted well with the Langmuir model with maximum adsorption capacity of 238.10 mg/g. Pseudo-first and pseudo-second-order kinetics models were tested with the experimental data, and pseudo-first-order kinetics was the best for the adsorption of 2,4-D by DSAC with coefficients of correlation R(2)>or=0.986 for all initial 2,4-D concentrations studied. The results indicated that the DSAC is very effective for the adsorption of 2,4-D from aqueous solutions.
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Affiliation(s)
- B H Hameed
- School of Chemical Engineering, Universiti Sains Malaysia, Engineering Campus, 14300 Nibong Tebal, Penang, Malaysia.
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