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Aziz K, Mamouni R, Kaya S, Aziz F. Low-cost materials as vehicles for pesticides in aquatic media: a review of the current status of different biosorbents employed, optimization by RSM approach. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:39907-39944. [PMID: 37227639 DOI: 10.1007/s11356-023-27640-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Accepted: 05/10/2023] [Indexed: 05/26/2023]
Abstract
Water contamination by pesticides is increasing dramatically due to population growth and the extensive use of pesticides in agriculture, leading to grave environmental and health concerns. Thus, efficient processes and the design and development of effective treatment technologies are required due to the enormous demand for fresh water. The adsorption approach has been widely used to remove organic contaminants such as pesticides because of its performance, less expense, high selectivity, and simplicity of operation compared to other treatment technologies. Among alternative adsorbents, biomaterials abundantly available for pesticide sorption from water resources have attracted the attention of researchers worldwide. The main objective of this review article is to (i) present studies on a wide range of raw or chemically modified biomaterials potentially effective in removing pesticides from aqueous media; (ii) indicating the effectiveness of biosorbents as green and low-cost materials for removing pesticides from wastewater; and (iii) furthermore, report the application of response surface methodology (RSM) for modeling and optimizing adsorption.
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Affiliation(s)
- Khalid Aziz
- Laboratory of Biotechnology, Materials and Environment, Faculty of Sciences, Ibn Zohr University, Agadir, Morocco
| | - Rachid Mamouni
- Laboratory of Biotechnology, Materials and Environment, Faculty of Sciences, Ibn Zohr University, Agadir, Morocco
| | - Savaş Kaya
- Health Services Vocational School, Department of Pharmacy, Sivas Cumhuriyet University, 58140, Sivas, Turkey
| | - Faissal Aziz
- Laboratory of Water, Biodiversity & Climate Changes, Faculty of Science Semlalia, Cadi Ayyad University, BP 2390, 40000, Marrakech, Morocco.
- National Centre for Research and Study On Water and Energy (CNEREE), University Cadi Ayyad, BP 511, 40000, Marrakech, Morocco.
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Farias KCS, Guimarães RCA, Oliveira KRW, Nazário CED, Ferencz JAP, Wender H. Banana Peel Powder Biosorbent for Removal of Hazardous Organic Pollutants from Wastewater. TOXICS 2023; 11:664. [PMID: 37624169 PMCID: PMC10459949 DOI: 10.3390/toxics11080664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 07/14/2023] [Accepted: 07/20/2023] [Indexed: 08/26/2023]
Abstract
Disposing of pollutants in water sources poses risks to human health and the environment, but biosorption has emerged as an eco-friendly, cost-effective, and green alternative for wastewater treatment. This work shows the ability of banana peel powder (BPP) biosorbents for efficient sorption of methylene blue (MB), atrazine, and glyphosate pollutants. The biosorbent highlights several surface chemical functional groups and morphologies containing agglomerated microsized particles and microporous structures. BPP showed a 66% elimination of MB in 60 min, with an adsorption capacity (qe) of ~33 mg g-1, and a combination of film diffusion and chemisorption governed the sorption process. The biosorbent removed 91% and 97% of atrazine and glyphosate pesticides after 120 min, with qe of 3.26 and 3.02 mg g-1, respectively. The glyphosate and atrazine uptake best followed the Elovich and the pseudo-first-order kinetic, respectively, revealing different sorption mechanisms. Our results suggest that BPP is a low-cost biomaterial for green and environmentally friendly wastewater treatment.
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Affiliation(s)
- Kelly C. S. Farias
- Nano & Photon Research Group, Laboratory of Nanomaterials and Applied Nanotechnology (LNNA), Institute of Physics, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, MS, Brazil
| | - Rita C. A. Guimarães
- Graduate Program in Health and Development in the Midwest Region, Medical School, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, MS, Brazil
| | - Karla R. W. Oliveira
- Institute of Chemistry, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, MS, Brazil
| | - Carlos E. D. Nazário
- Institute of Chemistry, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, MS, Brazil
| | - Julio A. P. Ferencz
- Nano & Photon Research Group, Laboratory of Nanomaterials and Applied Nanotechnology (LNNA), Institute of Physics, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, MS, Brazil
- Faculty of Engineering, Architecture, Urbanism, and Geography, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, MS, Brazil
| | - Heberton Wender
- Nano & Photon Research Group, Laboratory of Nanomaterials and Applied Nanotechnology (LNNA), Institute of Physics, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, MS, Brazil
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Rambaldo L, Ávila H, Escolà Casas M, Guivernau M, Viñas M, Trobajo R, Pérez-Burillo J, Mann DG, Fernández B, Biel C, Rizzo L, Bayona JM, Matamoros V. Assessment of a novel microalgae-cork based technology for removing antibiotics, pesticides and nitrates from groundwater. CHEMOSPHERE 2022; 301:134777. [PMID: 35500629 DOI: 10.1016/j.chemosphere.2022.134777] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 03/01/2022] [Accepted: 04/26/2022] [Indexed: 06/14/2023]
Abstract
Groundwater pollution has increased in recent years due to the intensification of agricultural and livestock activities. This results in a significant reduction in available freshwater resources. Here, we have studied the long term assessment of a green technology (1-4 L/day) based on a photobioreactor (PBR) containing immobilised microalgae-bacteria in polyurethane foam (PF) followed by a cork filter (CF) for removing nitrates, pesticides (atrazine and bromacil), and antibiotics (sulfamethoxazole and sulfacetamide) from groundwater. The prototype was moderately effective for removing nitrates (58%) at an HRT of 8 days, while its efficiency decreased at a HRT of 4 and 2 days (<20% removal). The combined use of PBR-CF enabled antibiotics and pesticides to be attenuated by up to 95% at an HRT of 8 days, but their attenuation decreased with shorter HRT, with pesticides being the compounds most affected (reducing from 97 to 98% at an HRT of 8 days to 23-45% at an HRT of 2 days). Pesticide transformation products were identified after the CF, supporting biodegradation as the main attenuation process. A gene-based metataxonomic assessment linked the attenuation of micropollutants to the presence of specific pesticide biodegradation species (e.g. genus Phenylobacterium, Sphingomonadaceae, and Caulobacteraceae). Therefore, the results highlighted the potential use of microalgae and cork to treat polluted groundwater.
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Affiliation(s)
- Lorenzo Rambaldo
- Department of Environmental Chemistry, IDAEA-CSIC, c/Jordi Girona, 18-26, E-08034, Barcelona, Spain
| | - Héctor Ávila
- Department of Environmental Chemistry, IDAEA-CSIC, c/Jordi Girona, 18-26, E-08034, Barcelona, Spain
| | - Mònica Escolà Casas
- Department of Environmental Chemistry, IDAEA-CSIC, c/Jordi Girona, 18-26, E-08034, Barcelona, Spain
| | - Miriam Guivernau
- IRTA-Institute for Food and Agricultural Research and Technology, Sustainability in Biosystems Programme, Torre Marimon, E-08140, Caldes de Montbui, Barcelona, Spain
| | - Marc Viñas
- IRTA-Institute for Food and Agricultural Research and Technology, Sustainability in Biosystems Programme, Torre Marimon, E-08140, Caldes de Montbui, Barcelona, Spain
| | - Rosa Trobajo
- IRTA-Institute for Food and Agricultural Research and Technology, Marine and Continental Waters Programme, Ctra de Poble Nou Km 5.5, E43540, Sant Carles de la Ràpita, Catalonia, Spain
| | - Javier Pérez-Burillo
- IRTA-Institute for Food and Agricultural Research and Technology, Marine and Continental Waters Programme, Ctra de Poble Nou Km 5.5, E43540, Sant Carles de la Ràpita, Catalonia, Spain; Departament of Geography, Universitat Rovira i Virgili, C/Joanot Martorell 15, E43500, Vila-seca, Catalonia, Spain
| | - David G Mann
- IRTA-Institute for Food and Agricultural Research and Technology, Marine and Continental Waters Programme, Ctra de Poble Nou Km 5.5, E43540, Sant Carles de la Ràpita, Catalonia, Spain; Royal Botanic Garden Edinburgh, Edinburgh, EH3 5LR, Scotland, UK
| | - Belén Fernández
- IRTA-Institute for Food and Agricultural Research and Technology, Sustainability in Biosystems Programme, Torre Marimon, E-08140, Caldes de Montbui, Barcelona, Spain
| | - Carme Biel
- IRTA-Institute for Food and Agricultural Research and Technology, Sustainable Plant Protection Programme, Ctra. de Cabrils, Km 2, E08348, Cabrils, Catalonia, Spain
| | - Luigi Rizzo
- Department of Civil Engineering, University of Salerno, Via Giovanni Paolo II 132, 84084, Fisciano, SA, Italy
| | - Josep M Bayona
- Department of Environmental Chemistry, IDAEA-CSIC, c/Jordi Girona, 18-26, E-08034, Barcelona, Spain
| | - Víctor Matamoros
- Department of Environmental Chemistry, IDAEA-CSIC, c/Jordi Girona, 18-26, E-08034, Barcelona, Spain.
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Blini Marengo Malheiros F, Vicente EF, Gois Morales A, Alberto-Silva C. Efficiency of the removal of tetraethyl pyrophosphate (TEPP) pesticide in water: use of cork granules as a natural adsorbent on acetylcholinesterase activity in neuronal PC12 cell. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2022; 57:554-560. [PMID: 35583269 DOI: 10.1080/03601234.2022.2077608] [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: 06/15/2023]
Abstract
Tetraethyl pyrophosphate (TEPP) is an organophosphate pesticide that irreversibly inhibits acetylcholinesterase (AChE). Cork powder or granules have been recommended as a sustainable sorbent to remove pesticides from water. In the present study, we evaluated the effectiveness of removing TEPP from water using wine corks to obtain cork granules as natural adsorbent, analyzing the TEPP effects on AChE activity in commercial enzyme from Electrophorus electricus and secreted by neuronal PC12 cells. TEPP inhibited AChE activity in a concentration-dependent manner. For the first time, we showed that different concentrations of TEPP diluted in water after adsorption experiments using cork granules decreased TEPP's inhibitory effects on AChE activity in commercial enzyme and neuronal PC12 cell culture medium. Our results suggest that the optimum removal of TEPP from water by corks was 91.4 ± 4.0%. Overall, the findings support the hypothesis that cork granules can be used to remediate pesticide-contaminated environments, such as those contaminated by organophosphate pesticides, and demonstrate a new application of a biochemical assay on AChE activity using a commercial enzyme or secreted by neuronal PC12 cells in culture as a possible methodologic strategy for evaluating the success of TEPP removal from water.
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Affiliation(s)
- Fernanda Blini Marengo Malheiros
- Postgraduate Course in Agribusiness and Development, Research Group on Environmental Management and Education (PGEA), São Paulo State University (UNESP), Tupã, SP, Brazil
| | - Eduardo Festozo Vicente
- Department of Biosystems Engineering, São Paulo State University (UNESP), School of Science and Engineering, Tupã, SP, Brazil
| | - Angélica Gois Morales
- Research Group on Environmental Management and Education (PGEA), São Paulo State University (UNESP), Department of Management, Development and Tecnology, Tupã, SP, Brazil
| | - Carlos Alberto-Silva
- Natural and Humanities Sciences Center, Experimental Morphophysiology Laboratory Federal University of ABC (UFABC), São Bernardo do Campo, SP, Brazil
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Haq AU, Saeed M, Muneer M, Jamal MA, Maqbool T, Tahir T. Biosorption of metribuzin pesticide by Cucumber (Cucumis sativus) peels-zinc oxide nanoparticles composite. Sci Rep 2022; 12:5840. [PMID: 35393506 PMCID: PMC8990079 DOI: 10.1038/s41598-022-09860-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Accepted: 03/25/2022] [Indexed: 11/13/2022] Open
Abstract
Herein, a biosorbent was prepared from cucumber peels modified with ZnO nanoparticles (CPZiONp-composite) for the biosorption of metribuzin. Characterization of the composite was accomplished using FTIR, SEM, EDX, surface area pore size analyzer and pH of point of zero charge (pHpzc). Biosorption study was executed in batch concerning the impact of pH, composite dose, contact time, initial metribuzin concentration and temperature. The biosorption depends on pH and maximum biosorption was acquired at pH 3.0. Surface chemistry of the composite was studied by determining the pHpzc and was found to be 6.1. The biosorption nature was investigated using isotherms and was assessed that Freundlich isotherm is well suited for the fitting of the biosorption data owing to the highest R2. The maximum biosorption capacity of CPZiONp-composite was found to be 200 mg g-1. The biosorption data were fitted in to different kinetic models and the outcomes suggesting that pseudo second order is a satisfactory model to interpret the biosorption data owing to the highest R2. Thermodynamic parameters for instance entropy, enthalpy and Gibbs free energy were computed and revealed that biosorption of metribuzin onto CPZiONp-composite is spontaneous and exothermic process.
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Affiliation(s)
- Atta Ul Haq
- Department of Chemistry, Government College University, Faisalabad, 38000, Pakistan.
| | - Muhammad Saeed
- Department of Chemistry, Government College University, Faisalabad, 38000, Pakistan
| | - Majid Muneer
- Department of Chemistry, Government College University, Faisalabad, 38000, Pakistan
| | | | - Tahir Maqbool
- Department of Chemistry, Government College University, Faisalabad, 38000, Pakistan
| | - Tayyab Tahir
- Department of Chemistry, Government College University, Faisalabad, 38000, Pakistan
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Cleaner Approach for Atrazine Removal Using Recycling Biowaste/Waste in Permeable Barriers. RECYCLING 2021. [DOI: 10.3390/recycling6020041] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This work addresses the rehabilitation of water contaminated with atrazine, entrapping it in a permeable and sustainable barrier designed with waste materials (sepiolite) and with biomaterials (cork and pine bark). Atrazine adsorption was assessed by kinetics and equilibrium assays and desorption was tested with different extraction solvents. Adsorbed atrazine was 100% recovered from sepiolite using 20% acetonitrile solution, while 40% acetonitrile was needed to leach it from cork (98%) and pine bark (94%). Continuous fixed-bed experiments using those sorbents as PRB were performed to evaluate atrazine removal for up-scale applications. The modified dose-response model properly described the breakthrough data. The highest adsorption capacity was achieved by sepiolite (23.3 (±0.8) mg/g), followed by pine bark (14.8 (±0.6) mg/g) and cork (13.0 (±0.9) mg/g). Recyclability of sorbents was evaluated by adsorption-desorption cycles. After two regenerations, sepiolite achieved 81% of atrazine removal, followed by pine with 78% and cork with 54%. Sepiolite had the best performance in terms of adsorption capacity/stability. SEM and FTIR analyses confirmed no significant differences in material morphology and structure. This study demonstrates that recycling waste/biowaste is a sustainable option for wastewater treatment, with waste valorization and environmental protection.
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Andrade Teixeira R, Fonseca Dinali LA, Leijoto de Oliveira H, da Silva ATM, Bastos Borges K. Efficient and selective extraction of azamethiphos and chlorpyrifos residues from mineral water and grape samples using magnetic mesoporous molecularly imprinted polymer. Food Chem 2021; 361:130116. [PMID: 34029898 DOI: 10.1016/j.foodchem.2021.130116] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 05/11/2021] [Accepted: 05/12/2021] [Indexed: 12/18/2022]
Abstract
A magnetic mesoporous molecularly imprinted polymers was synthesized on the surface of magnetic nanoparticles silanized with 3-(trimethoxysilyl) propyl methacrylate to introduce reactive methacrylate groups. Subsequently, methacrylic acid monomers were grafted onto the surface of this adsorbent functionalized via polymerization by precipitation. Magnetic mesoporous molecularly imprinted polymer was properly characterized by different techniques and applied as adsorbent in magnetic solid phase extraction for selective determination of two organophosphorus pesticides, azamethiphos and chlorpyrifos, in mineral water and grape samples. After sample preparation optimization, recoveries of 99.56% and 98.86% were obtained for azamethiphos and chlorpyrifos, respectively. The magnetic solid phase extraction coupled to HPLC-UV presented limit of quantification of 5 ng mL-1, linearity ranged of 5 to 1000 ng mL-1, in addition to adequate accuracy, precision and robustness. The pesticides showed stability in the matrix and were satisfactorily quantified in real mineral water and grape samples.
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Affiliation(s)
- Roseane Andrade Teixeira
- Departamento de Ciências Naturais, Universidade Federal de São João del-Rei (UFSJ), Campus Dom Bosco, Praça Dom Helvécio 74, Fábricas, 36301-160 São João del-Rei, Minas Gerais, Brazil
| | - Laíse Aparecida Fonseca Dinali
- Departamento de Ciências Naturais, Universidade Federal de São João del-Rei (UFSJ), Campus Dom Bosco, Praça Dom Helvécio 74, Fábricas, 36301-160 São João del-Rei, Minas Gerais, Brazil
| | - Hanna Leijoto de Oliveira
- Departamento de Ciências Naturais, Universidade Federal de São João del-Rei (UFSJ), Campus Dom Bosco, Praça Dom Helvécio 74, Fábricas, 36301-160 São João del-Rei, Minas Gerais, Brazil
| | - Anny Talita Maria da Silva
- Departamento de Ciências Naturais, Universidade Federal de São João del-Rei (UFSJ), Campus Dom Bosco, Praça Dom Helvécio 74, Fábricas, 36301-160 São João del-Rei, Minas Gerais, Brazil
| | - Keyller Bastos Borges
- Departamento de Ciências Naturais, Universidade Federal de São João del-Rei (UFSJ), Campus Dom Bosco, Praça Dom Helvécio 74, Fábricas, 36301-160 São João del-Rei, Minas Gerais, Brazil.
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Ighalo JO, Adeniyi AG, Adelodun AA. Recent advances on the adsorption of herbicides and pesticides from polluted waters: Performance evaluation via physical attributes. J IND ENG CHEM 2021. [DOI: 10.1016/j.jiec.2020.10.011] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Morelli DC, Mafra G, Santos AV, Merib J, Carasek E. Designing a green device to BAμE: Recycled cork pellet as extraction phase for the determination of parabens in river water samples. Talanta 2020; 219:121369. [DOI: 10.1016/j.talanta.2020.121369] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 06/29/2020] [Accepted: 06/30/2020] [Indexed: 01/29/2023]
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Ali S, Abdelhalim A. Removal of amprolium from water by roots and seeds ash of Salvadora persica. JOURNAL OF TAIBAH UNIVERSITY FOR SCIENCE 2020. [DOI: 10.1080/16583655.2020.1850623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Samah Ali
- Chemistry Department, College of Science, Taibah University, Al-Madinah Al-Munawarah, Saudi Arabia
- The National Organization for Drug Control and Research, Giza, Egypt
| | - Abeer Abdelhalim
- Chemistry Department, College of Science, Taibah University, Al-Madinah Al-Munawarah, Saudi Arabia
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Abstract
Green analytical chemistry principles aim to minimize the negative impact of analytical procedures in the environment, which can be considered both at close (to ensure the safety of the analysts) and global (to conserve our natural resources) levels. These principles suggest, among other guidelines, the reduction/minimization of the sample treatment and the use of renewable sources when possible. The first aspect is largely fulfilled by microextraction, which is considered to be among the greenest sample treatment techniques. The second consideration is attainable if natural products are used as raw materials for the preparation of new extraction phases. This strategy is in line with the change in our production system, which is being gradually moved from a linear model (take–make–dispose) to a circular one (including reusing and recycling as key terms). This article reviews the potential of natural products as sorbents in extraction and microextraction techniques from the synergic perspectives of two research groups working on the topic. The article covers the use of unmodified natural materials and the modified ones (although the latter has a less green character) to draw a general picture of the usefulness of the materials.
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Guimarães Neto JOA, Luz LD, Aguiar Junior TR. Effects of an aluminum-based chemical remediator on the cyanobacteria population: a study in the northeast of Brazil. ENVIRONMENTAL MONITORING AND ASSESSMENT 2019; 191:743. [PMID: 31713695 DOI: 10.1007/s10661-019-7926-x] [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: 08/08/2019] [Accepted: 10/29/2019] [Indexed: 06/10/2023]
Abstract
Water sources destined to human supply are increasingly threatened worldwide due to various sources of pollution, either point or diffuse. In this sense, the objective of this work was to evaluate the efficiency of an aluminum-based chemical remediator in the Joanes River. An statistical analysis of physical, chemical, biological, and hydraulic monitoring data was performed relying on a 2013-2018 recording period, provided by the local sanitation service provider and the environmental agency. The results showed that even with the use of aluminum-based chemical remediators, the key parameters for controlling flowering events remained high with mean values of 0.18 mg P L-1, 176.155 cells mL-1 of cyanobacteria and peaks of 1.56 μg L-1 and 4.02 μg L-1 for microcystin and saxitoxin, respectively. At the end of this study, it was verified that the aluminum-based chemical remediator showed low effectiveness in the reduction of phosphorus and cyanobacteria, opposing to expectations of the sanitation provider.
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Affiliation(s)
| | - Lafayette Dantas Luz
- Department of Environmental Engineering, Polytechnic School, Federal University of Bahia (UFBA), Salvador, Bahia, Brazil
| | - Terencio Rebello Aguiar Junior
- Department of Environmental Engineering, Polytechnic School, Federal University of Bahia (UFBA), Salvador, Bahia, Brazil
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Hemp to limit diffusion of difenoconazole in vegetable garden soils. Heliyon 2019; 5:e02392. [PMID: 31517120 PMCID: PMC6731327 DOI: 10.1016/j.heliyon.2019.e02392] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 06/06/2019] [Accepted: 08/28/2019] [Indexed: 11/25/2022] Open
Abstract
Triazole molecules are used to manage invasive aspergillosis, a fungal infection mainly due to Aspergillus fumigatus. A. fumigatus is not a phytopathogen, but, as it is widespread in soils, triazole fungicides have an unintended impact on it, selecting resistant populations’ in environment. Thus, to maintain our ability to control fungal infections, whether in human health or agriculture, reduce the impact of the use of triazoles in the environment is important, notably limiting their diffusion in soils. Here we tested a hemp-based material as adsorbent to limit the spread of difenoconazole, a triazole fungicide, in vegetable soils. We studied the effects of contact time, material dose, difenoconazole concentration, and organic content of the soil using batch mode and percolation methods. Batch experiments showed that the material exhibited high adsorption capacities toward difenoconazole. Removal from the soil water increased from 46.6% using 0.35 g hemp per kg of soil to 77.0% using 1.75 g hemp per kg, for a contact time of 15 min and an initial difenoconazole concentration of 1.2 mg/L. For a contact time of 240 min, the removal was 93.5%. Percolation experiments showed that the quantity of difenoconazole removed was greater than the amount obtained by batch method: 41.9% of removal with only one passes of solution at a concentration of 12 mg/L is obtained through percolation technique whereas, with similar conditions, only 20% of removal is obtained by batch method, i.e. after 1 min of contact. The removal was strongly dependent on the number of passes: the values increased from 57.0% to 91.0% with increasing the number of passes from 1 to 15. Addition of hemp to soils allows to remove efficiently the difenoconazole fungicide from soil water. Hemp-based felt is a new and safe adsorbent that can be applied in agriculture to limit crop contamination.
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