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Huang Z, Chen F, Yang S, Ding Y, Peng G, Chen CC. Surface physicochemical properties and dibutyl phthalate adsorption of microplastics naturally aged in seawater. MARINE POLLUTION BULLETIN 2025; 217:118064. [PMID: 40318259 DOI: 10.1016/j.marpolbul.2025.118064] [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: 03/30/2025] [Revised: 04/27/2025] [Accepted: 04/27/2025] [Indexed: 05/07/2025]
Abstract
Microplastics (MPs) are prevalent in marine environments and can adsorb contaminants from surrounding seawater, potentially transferring harmful chemicals through the food chain and raising ecological concerns. While the adsorption of aquatic pollutants by MPs has been intensively studied, research on phthalate esters (PAEs, common plasticizers frequently found in seawater) remains limited, primarily focusing on pristine MPs in artificial media. This study characterized the surface physicochemical properties of polyethylene (PE) and polystyrene (PS) MPs before and after natural aging for one week to three months off the coast, and investigated the adsorption isotherms of dibutyl phthalate (DBP, one of the most abundant PAEs in seawater) on these MPs in both natural seawater and ultrapure water. Surface characterization revealed significant alterations in MP surface characteristics due to natural aging, with morphologies and nanomechanical features varied by MP type and oxidation occurring after one-month aging. The best-performing Langmuir-Freundlich model suggested that DBP adsorption onto MPs involved multilayer processes on heterogeneous surfaces with varying adsorption energies. Further analysis indicated that PS had a higher DBP adsorption capacity than PE, attributed to its porous glassy structure and π-π interactions with DBP. The trivial impact of natural aging could relate to competing effects of increased roughness and the formation of polar oxygen-containing groups on aged MPs. The "salting-out" effect in natural seawater was likely impeded by free ion competition and MP aggregation under higher ionic strength. This study provides valuable insights into the interactions between MPs and their coexisting contaminants in marine environments.
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Affiliation(s)
- Zehui Huang
- College of Chemistry and Chemical Engineering, Shantou University, Shantou 515063, China
| | - Fengyuan Chen
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
| | - Shikun Yang
- College of Chemistry and Chemical Engineering, Shantou University, Shantou 515063, China
| | - Yue Ding
- College of Chemistry and Chemical Engineering, Shantou University, Shantou 515063, China
| | - Guogan Peng
- Shenzhen Key Laboratory of Precision Measurement and Early Warning Technology for Urban Environmental Health Risks, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China; Key Laboratory of the Coastal and Wetland Ecosystems (Xiamen University), Ministry of Education, Xiamen 361102, China; School of Environment, Hangzhou Institute for Advanced Study, UCAS, Hangzhou 310024, China
| | - Ciara Chun Chen
- College of Chemistry and Chemical Engineering, Shantou University, Shantou 515063, China.
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M Galindo J, M Andreu C, Merino S, Herrero MA, Vázquez E, Sánchez-Migallón AM, Castañeda G. Few-layer graphene-hybrid sulfonate hydrogels for high-efficient adsorption of heavy metal (Pb 2+, Ni 2+, Cd 2+) in water treatment. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2025; 292:117934. [PMID: 39987687 DOI: 10.1016/j.ecoenv.2025.117934] [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: 07/17/2024] [Revised: 02/14/2025] [Accepted: 02/17/2025] [Indexed: 02/25/2025]
Abstract
Heavy metal ions pose a significant environmental threat due to their non-degradability and accumulation to toxic levels. In addressing this challenge, we have designed two novel hydrogels through radical polymerization, an efficient and cost-effective method, using sulfonate groups. One hydrogel remained pristine, while the other was hybridized with few-layer graphene (FLG). The incorporation of FLG interacts with the polymeric network without compromising its thermal stability, as confirmed by Fourier-transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). It also reduces pore size (from 42 to 35 µm), enhances mechanical properties (Young's modulus increased from 32 to 44 kPa), and increases the swelling degree (from 62 to 76), while maintaining a high adsorption capacity. The ability of both hydrogels to adsorb Pb²⁺, Ni²⁺, and Cd²⁺ ions from aqueous solutions was examined. These hydrogels demonstrated high adsorption capacity (qe), with maximum uptake of 631.7 mg/g for Pb²⁺, 633.3 mg/g for Ni²⁺, and 373.1 mg/g for Cd²⁺ in the pristine hydrogels (VBS) and 540.6 mg/g for Pb²⁺, 615.1 mg/g for Ni²⁺, and 304.9 mg/g for Cd²⁺ in the hybrid FLG hydrogels (VBS_G). Adsorption kinetics studies indicated a fit to the pseudo-second-order model for all metal ions. Adsorption isotherms showed that Pb²⁺, Cd²⁺ and Ni²⁺ follow the Freundlich model. To demonstrate reusability and regeneration, hydrogels with adsorbed ions were introduced into acidic media. Evaluating their performance in various water sources, the hydrogels showcased potential as efficient adsorbents for water purification and agricultural applications, offering a promising solution for contaminated water treatment.
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Affiliation(s)
- Josué M Galindo
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha, Ciudad Real 13071, Spain; Instituto Regional de Investigación Científica Aplicada (IRICA), UCLM, Ciudad Real 13071, Spain
| | - Carlos M Andreu
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha, Ciudad Real 13071, Spain; Instituto Regional de Investigación Científica Aplicada (IRICA), UCLM, Ciudad Real 13071, Spain
| | - Sonia Merino
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha, Ciudad Real 13071, Spain; Instituto Regional de Investigación Científica Aplicada (IRICA), UCLM, Ciudad Real 13071, Spain
| | - M Antonia Herrero
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha, Ciudad Real 13071, Spain; Instituto Regional de Investigación Científica Aplicada (IRICA), UCLM, Ciudad Real 13071, Spain
| | - Ester Vázquez
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha, Ciudad Real 13071, Spain; Instituto Regional de Investigación Científica Aplicada (IRICA), UCLM, Ciudad Real 13071, Spain
| | - Ana M Sánchez-Migallón
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha, Ciudad Real 13071, Spain; Instituto Regional de Investigación Científica Aplicada (IRICA), UCLM, Ciudad Real 13071, Spain.
| | - Gregorio Castañeda
- Instituto Regional de Investigación Científica Aplicada (IRICA), UCLM, Ciudad Real 13071, Spain; Departamento de Química Analítica y Tecnología de Alimentos, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha, Ciudad Real 13071, Spain.
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3
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Diagboya PN, Olu-Owolabi BI, Düring RA. Exploring the interactions of glyphosate in soil: the sorption scenario upon soil depletion and effect on waterleaf ( Talinum triangulare) growth. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2024; 26:2051-2061. [PMID: 39380556 DOI: 10.1039/d4em00433g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/10/2024]
Abstract
The pesticide glyphosate has contributed immensely to the ease of farming and high yields. However, the ever-increasing environmental input of pesticides is of particular interest due to several unintended effects on non-target organisms. In soil, the sorption, transport, possible uptake, and effect on plant growth are still not well understood, and much so for the sub-Sahara. Sorption processes are contingent on the soil composition, characteristics, and ambient conditions, and these are becoming increasingly affected by climate change in a way that may alter pesticide fate. Hence, representative sub-Saharan whole soil (WS) treated to eliminate organic matter (OMR) and iron oxides (IOR) was employed to ascertain the contributions of these major constituents to glyphosate sorption processes, as well as ascertain the effect of glyphosate in soil on the growth of Talinum triangulare-waterleaf. Glyphosate sorption for all treatments was rapid with equilibrium at around 720 min. The sorption decreased as pH increased, and was concentration-dependent, gradually increasing with glyphosate concentration. The process was endothermic, and sorption data were better described by the fractal pseudo-second-order and Freundlich adsorption isotherm models, suggesting a complex interplay of interactive sorption forces. The IOR sample (with iron oxide depleted but organic matter intact) exhibited higher sorption than the OMR and WS, highlighting the contribution of organic matter in glyphosate sorption. Hysteresis was high for all samples and increased with temperature. Considering the unregulated usage of glyphosate in the sub-Sahara, the poor sorption, especially in treated soils, observed in this study suggests a high possibility of glyphosate leaching into the aquifer and poisoning of this water source, while the high hysteresis implied the bio-availability of glyphosate in surface soil for plant absorption, hence affecting growth; as confirmed in the waterleaf growth study where growth in the organic-matter/iron-oxide-depleted soils was substantially stunted. Hence, glyphosate affects waterleaf growth, especially in organic-matter/iron-oxide-depleted soils.
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Affiliation(s)
- Paul N Diagboya
- Institute of Soil Science and Soil Conservation, Research Centre for BioSystems, Land Use and Nutrition (iFZ), Justus Liebig University Giessen, Heinrich-Buff-Ring 26, 35392 Giessen, Germany.
- Environmental Fate of Chemicals and Remediation (EnFaCRe) Laboratory, Department of Environmental Management and Toxicology, University of Delta, PMB 2090, Agbor, Nigeria
| | | | - Rolf-Alexander Düring
- Institute of Soil Science and Soil Conservation, Research Centre for BioSystems, Land Use and Nutrition (iFZ), Justus Liebig University Giessen, Heinrich-Buff-Ring 26, 35392 Giessen, Germany.
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Diagboya PN, Düring RA. Assessing global-warming induced soil organic matter and iron oxides depletion: Empirical insights into sorption and uptake of atrazine by plants. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 283:116794. [PMID: 39079404 DOI: 10.1016/j.ecoenv.2024.116794] [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: 05/24/2024] [Revised: 07/21/2024] [Accepted: 07/24/2024] [Indexed: 09/11/2024]
Abstract
Recent pesticide use is alarmingly high and unregulated in several parts of the world. Pesticide fate in soil is controlled by sorption processes which affect the subsequent transport and chemical reactivity in the environment, as well as uptake by plants. Sorption processes are dependent on soil composition and properties, but these are beginning to be affected by global warming-linked factors leading to soil depletion. Thus, it is vital to decipher soils' response, especially in the sub-Sahara (SS), to the depletion of some inherent components in the presence of pesticides. This was ascertained by monitoring a model pesticide (atrazine) sorption and desorption on whole SS soil (WS), and the same soil whose organic matter (OMR) and iron oxides (IOR) were substantially depleted, as well as studying atrazine uptake from these soils by fast-growing vegetables. Organic matter depletion enhanced equilibrium in OMR. Sorption was enhanced at lower ambient pH, higher initial atrazine concentration, and higher temperature. Hysteresis was low resulting in high desorption. Overall, atrazine desorption of ≥65 % was observed; it was higher in OMR (≥95 %) since SOM enhanced hysteresis. Though sub-Saharan soils are rich in iron oxides, SOM played a significantly higher role in sorption than iron oxides in this soil. This result suggests a high potential for atrazine to leach into the aquifer in the sub-Saharan. Atrazine uptake experiment by waterleaf and spinach showed that it could be detected in soil after 63 d, and its presence significantly affected the growth of both vegetables especially in soils with depleted SOM and iron oxides, and at high (100 µg/kg) atrazine spiking. Spinach may be a higher atrazine accumulator than waterleaf. It may be concluded that waterleaf and spinach grown on atrazine-contaminated soils, especially on SOM/iron oxide-depleted soils, are likely to accumulate atrazine.
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Affiliation(s)
- Paul N Diagboya
- Institute of Soil Science and Soil Conservation, Research Centre for BioSystems, Land Use and Nutrition (iFZ), Justus Liebig University Giessen, Heinrich-Buff-Ring 26, Giessen 35392, Germany; Environmental fate of chemicals and remediation (EnFaCRe) laboratory, Department of Environmental Management and Toxicology, University of Delta, Agbor, Nigeria.
| | - Rolf-Alexander Düring
- Institute of Soil Science and Soil Conservation, Research Centre for BioSystems, Land Use and Nutrition (iFZ), Justus Liebig University Giessen, Heinrich-Buff-Ring 26, Giessen 35392, Germany
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Bahaidarah EA. An Effective Sol-Gel-Functionalized Polyurethane Foams Solid Platform Packed Minicolumns for Complete Extraction of Chromium (VI) from Water: Kinetic, Sorption Isotherms, Thermodynamic Study, and Analytical Utility. Int J Anal Chem 2024; 2024:3152894. [PMID: 39376696 PMCID: PMC11458274 DOI: 10.1155/2024/3152894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 06/06/2024] [Accepted: 07/15/2024] [Indexed: 10/09/2024] Open
Abstract
In the modern era, sol-gel plays a key role in the progress of a new generation of dispersive solid-phase microextractors (d-µ SPMEs) for the removal of organic and inorganic pollutants in complex matrices. Thus, the current study reports the use of sol-gel-functionalized polyurethane foams (PUFs) as a novel solid platform for complete extraction of chromium (VI) species from aqueous media. The planned protocol was based upon the complete extraction of the formed binary complex ion associates between the protonated ether and/or urethane groups of PUFs and chlorochromate anion [CrO3Cl]- aq in aqueous HCl (≥1M) medium in addition to H-bonding and the electrostatic π-π interaction that resulted between the CrO3Cl- and the silanol group (Si/ZrO2, Si-O-Zr) and siloxane (Si-O-Si) groups of the sol-gel. The impact of the analytical parameters (solution pH, natural mineral acids, shaking time, temperature, and chromium (VI) concentrations) was critically studied. At the optimal conditions, the uptake capacity of the established extractor (9.9 mg·g-1) was in agreement with the Langmuir adsorption capacity (12.08 mg·g-1) of the monolayer. The sorption data fitted well with the pseudo first-order kinetic model (R 2 = 0.9961) with an overall rate constant (k 1) of 0.081 min-1 and an equilibrium capacity (q e ) of 8.6 mg·g-1, which is in a good agreement with the experimental value (9.9 mg·g-1). The sorption of the oxyion [CrO3Cl]- aq onto the solid sorbent is an endothermic and spontaneous process as reflected from the values of ΔH (6.99 kJ·mol-1) and ΔG (-8.14 kJ·mol-1 at 293 K), respectively. The ΔS value (15.13 kJ·mol-1·K-1) reflects that the [CrO3Cl]- aq retention onto the sol-gel-treated PUFs sorbent proceeded in a more unplanned fashion. Sol-gel-treated PUFs sorbent-packed minicolumns were successfully used for the complete removal of trace levels of chromium (VI) species from water samples. Sorbed chromium (VI) species were recovered with NaOH (0.5 M) and analysed by spectrophotometry, which supports the utility of the sol-gel-treated PUFs as a low-cost solid extractor for water treatment.
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Affiliation(s)
- Effat A. Bahaidarah
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
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6
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Baldasso V, Sayen S, Gomes CAR, Frunzo L, Almeida CMR, Guillon E. Metformin and lamotrigine sorption on a digestate amended soil in presence of trace metal contamination. JOURNAL OF HAZARDOUS MATERIALS 2024; 466:133635. [PMID: 38306838 DOI: 10.1016/j.jhazmat.2024.133635] [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: 11/27/2023] [Revised: 01/24/2024] [Accepted: 01/25/2024] [Indexed: 02/04/2024]
Abstract
The antidiabetic drug metformin and antiepileptic drug lamotrigine are contaminants of emerging concern that have been detected in biowaste-derived amendments and in the environment, and their fate must be carefully studied. This work aimed to evaluate their sorption behaviour on soil upon digestate application. Experiments were conducted on soil and digestate-amended soil as a function of time to study kinetic processes, and at equilibrium also regarding the influence of trace metals (Pb, Ni, Cr, Co, Cu, Zn) at ratio pharmaceutical/metal 1/1, 1/10, and 1/100. Pharmaceutical desorption experiments were also conducted to assess their potential mobility to groundwater. Results revealed that digestate amendment increased metformin and lamotrigine adsorbed amounts by 210% and 240%, respectively, increasing organic matter content. Metformin adsorption kinetics were best described by Langmuir model and those of lamotrigine by Elovich and intraparticle diffusion models. Trace metals did not significantly affect the adsorption of metformin in amended soil while significantly decreased that of lamotrigine by 12-39%, with exception for Cu2+ that increased both pharmaceuticals adsorbed amounts by 5 - 8%. This study highlighted the influence of digestate amendment on pharmaceutical adsorption and fate in soil, which must be considered in the circular economy scenario of waste-to-resource.
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Affiliation(s)
- Veronica Baldasso
- CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Portugal; Chemistry and Biochemistry Department, Faculty of Sciences, University of Porto, Porto, Portugal; Molecular Chemistry Institute of Reims, ICMR UMR CNRS 7312, University of Reims Champagne-Ardenne, Reims, France.
| | - Stéphanie Sayen
- Molecular Chemistry Institute of Reims, ICMR UMR CNRS 7312, University of Reims Champagne-Ardenne, Reims, France.
| | - Carlos A R Gomes
- CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Portugal; Chemistry and Biochemistry Department, Faculty of Sciences, University of Porto, Porto, Portugal
| | - Luigi Frunzo
- Department of Mathematics and Applications Renato Caccioppoli, University of Naples Federico II, Napoli, Italy
| | - C Marisa R Almeida
- CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Portugal; Chemistry and Biochemistry Department, Faculty of Sciences, University of Porto, Porto, Portugal
| | - Emmanuel Guillon
- Molecular Chemistry Institute of Reims, ICMR UMR CNRS 7312, University of Reims Champagne-Ardenne, Reims, France
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Junck J, Diagboya PN, Peqini A, Rohnke M, Düring RA. Mechanistic interpretation of the sorption of terbuthylazine pesticide onto aged microplastics. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 345:123502. [PMID: 38316252 DOI: 10.1016/j.envpol.2024.123502] [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: 11/25/2023] [Revised: 01/19/2024] [Accepted: 02/03/2024] [Indexed: 02/07/2024]
Abstract
Microplastics (MPs) pose a global concern due to their ubiquitous distribution. Once in the environment, they are subject to aging, which changes their chemical-physical properties and ability to interact with organic pollutants, such as pesticides. Therefore, this study investigated the interaction of the hydrophobic herbicide terbuthylazine (TBA), which is widely used in agriculture, with artificially aged polyethylene (PE) MP (PE-MP) to understand how aging affects its sorption. PE was aged by an accelerated weathering process including UV irradiation, hydrogen peroxide, and ultrasonic treatment, and aged particles were characterized in comparison to pristine particles. Sorption kinetics were performed for aged and pristine materials, while further sorption studies with aged PE-MP included determining environmental factors such as pH, temperature, and TBA concentration. Sorption of TBA was found to be significantly lower on aged PE-MP compared to pristine particles because aging led to the formation of oxygen-containing functional groups, resulting in a reduction in hydrophobicity and the formation of negatively charged sites on oxidized surfaces. For pristine PE-MP, sorption kinetics were best described by the pseudo-second-order model, while it was intra-particle diffusion for aged PE-MP as a result of crack and pore formation. Sorption followed a decreasing trend with increasing pH, while it became less favorable at higher temperatures. The isotherm data revealed a complex sorption process on altered, heterogeneous surfaces involving hydrophobic interactions, hydrogen bonding, and π-π interactions, and the process was best described by the Sips adsorption isotherm model. Desorption was found to be low, confirming a strong interaction. However, thermodynamic results imply that increased temperatures, such as those resulting from climate change, could promote the re-release of TBA from aged PE-MP into the environment. Time-of-flight secondary ion mass spectrometry (ToF-SIMS) confirmed TBA sorption onto PE.
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Affiliation(s)
- Johannes Junck
- Institute of Soil Science and Soil Conservation, Research Center for Biosystems, Land Use and Nutrition, Justus Liebig University, Giessen, Germany.
| | - Paul N Diagboya
- Institute of Soil Science and Soil Conservation, Research Center for Biosystems, Land Use and Nutrition, Justus Liebig University, Giessen, Germany; Environmental Fate of Chemicals and Remediation (EnFaCRe) Laboratory, Department of Environmental Management and Toxicology, University of Delta, Agbor, Nigeria
| | - Aleksander Peqini
- Institute of Soil Science and Soil Conservation, Research Center for Biosystems, Land Use and Nutrition, Justus Liebig University, Giessen, Germany; Faculty of Agriculture and Environment, Agricultural University of Tirana, Tirana, Albania
| | - Marcus Rohnke
- Institute of Physical Chemistry and Center for Materials Research, Justus Liebig University, Giessen, Germany
| | - Rolf-Alexander Düring
- Institute of Soil Science and Soil Conservation, Research Center for Biosystems, Land Use and Nutrition, Justus Liebig University, Giessen, Germany
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Alwael H, Alsulami AN, Abduljabbar TN, Oubaha M, El-Shahawi MS. Innovative Sol-gel functionalized polyurethane foam for sustainable water purification and analytical advances. Front Chem 2024; 12:1324426. [PMID: 38389725 PMCID: PMC10881768 DOI: 10.3389/fchem.2024.1324426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 01/23/2024] [Indexed: 02/24/2024] Open
Abstract
Nanomaterial combined polymeric membranes such as polyurethane foams (PUFs) have garnered enormous attention in the field of water purification due to their ease of management and surface modification, cost-effectiveness, and mechanical, chemical, and thermal properties. Thus, this study reports the use of novel Sol-gel impregnated polyurethane foams (Sol-gel/PUFs) as new dispersive solid phase microextractors (d- µ SPME) for the efficient separation and subsequent spectrophotometric detection of Eosin Y (EY) textile dye in an aqueous solution with a pH of 3-3.8. The Sol gel, PUFs, and Sol gel-impregnated PUFs were characterized using scanning electron microscopy (SEM), goniometry measurements, dynamic light scattering (DLS), energy dispersive spectroscopy (EDS), UV-Visible, and FTIR spectra. Batch experiment results displayed a remarkable removal percentage (96% ± 5.4%) of the EY from the aqueous solution, with the total sorption time not exceeding 60 min. These data indicate rate-limited sorption via diffusion and/or surface complex ion associate formations after the rapid initial sorption steps. A pseudo-second order kinetic model thoroughly explained the sorption kinetics, providing a sorption capacity (qe) of 37.64 mg g-1, a half-life time (t1/2) of 0.8 ± 0.01 min, and intrinsic penetration control dye retention. The thermodynamic results revealed a negative value for ΔG⁰ (-78.07 kJ mol-1 at 293 K), clearly signifying that the dye uptake was spontaneous, as well as a negative value for ΔH⁰ (-69.58 kJ mol-1) and a positive value for ΔS⁰ (147.65 J mol-1 K-1), making clear the exothermic nature of EY adsorption onto the sorbent, with a growth in randomness at the molecular level. A ternary retention mechanism is proposed, involving the "weak base anion exchanger" of {(-CH2-OH+ -CH2-) (Dye anion)-}Sol-gel/PUF and/or {(-NH2 + -COO-) (Dye anion)-}Sol-gel/PUF via solvent extraction and "surface adsorption" of the dye anion on/in the Sol-gel/PUFs membranes in addition to H-bonding, including surface complexation and electrostatic π-π interaction, between the dye and the silicon/zirconium oxide (Si-O-Zr) and siloxane (Si-O-Si) groups on the sorbent. Complete extraction and recovery (93.65 ± 0.2, -102.28 ± 2.01) of EY dye with NaOH (0.5 M) as a proper eluting agent was achieved using a sorbent-packed mini column. In addition, the established extractor displayed excellent reusability and does not require organic solvents for EY enrichment in water samples, making it a talented nominee as a novel sorbent for EY sorption from wastewater. This study is of great consequence for expanding the applicatio1n of Sol-gel/PUFs in developing innovative spectrophotometric sensing strategies for dye determination. In view of this, it would also be remarkable to perform future studies to explore the analytical implications of this extractor regarding safety and environmental and public health issues associated to the pollutant.
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Affiliation(s)
- H Alwael
- Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - A N Alsulami
- Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - T N Abduljabbar
- Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - M Oubaha
- Centre for Research in Engineering Surface Technologies (CREST), FOCAS Institute, Technological University Dublin, Dublin, Ireland
| | - M S El-Shahawi
- Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
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9
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He S, Sun S, Xue H, Kang C, Yu S. Polypropylene microplastics aging under natural conditions in winter and summer and its effects on the sorption and desorption of nonylphenol. ENVIRONMENTAL RESEARCH 2023; 225:115615. [PMID: 36871944 DOI: 10.1016/j.envres.2023.115615] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 02/27/2023] [Accepted: 03/02/2023] [Indexed: 06/18/2023]
Abstract
Plastics in the environment undergo various aging effects. Due to the changes in physical and chemical properties, the sorption behavior of aged microplastics (MPs) for pollutants differs from that of pristine MPs. In this paper, the most common disposable polypropylene (PP) rice box was used as the source of MPs to study the sorption and desorption behavior of nonylphenol (NP) on pristine and naturally aged PPs in summer and winter. The results show that summer-aged PP has more obvious property changes than winter-aged PP. The equilibrium sorption amount of NP on PP is summer-aged PP (477.08 μg/g) > winter-aged PP (407.14 μg/g) > pristine PP (389.29 μg/g). The sorption mechanism includes the partition effect, van der Waals forces, hydrogen bonds and hydrophobic interaction, among which chemical sorption (hydrogen bonding) dominates the sorption; moreover, partition also plays an important role in this process. Aged MPs' more robust sorption capacity is attributed to the larger specific surface area, stronger polarity and more oxygen-containing functional groups on the surface that are conducive to forming hydrogen bonds with NP. Desorption of NP in the simulated intestinal fluid is significant owning to intestinal micelles' presence: summer-aged PP (300.52 μg/g) > winter-aged PP (291.08 μg/g) > pristine PP (287.12 μg/g). Hence, aged PP presents a more vital ecological risk.
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Affiliation(s)
- Shuiyuan He
- Key Laboratory of Groundwater Resources and Environment, Jilin University, Ministry of Education, Changchun, 130021, China
| | - Siyang Sun
- Key Laboratory of Groundwater Resources and Environment, Jilin University, Ministry of Education, Changchun, 130021, China
| | - Honghai Xue
- Key Laboratory of Groundwater Resources and Environment, Jilin University, Ministry of Education, Changchun, 130021, China; Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Jilin Jianzhu University, Changchun, 130021, China
| | - Chunli Kang
- Key Laboratory of Groundwater Resources and Environment, Jilin University, Ministry of Education, Changchun, 130021, China.
| | - Shuyi Yu
- Key Laboratory of Groundwater Resources and Environment, Jilin University, Ministry of Education, Changchun, 130021, China
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10
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Davoodi SM, Miri S, Brar SK, Martel R. Formulation of synthetic bacteria consortia for enzymatic biodegradation of polyaromatic hydrocarbons contaminated soil: soil column study. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023:10.1007/s11356-023-27233-5. [PMID: 37178293 DOI: 10.1007/s11356-023-27233-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Accepted: 04/22/2023] [Indexed: 05/15/2023]
Abstract
As an efficient method to remove contaminants from highly polluted sites, enzyme biodegradation addresses unresolved issues such as bioremediation inefficiency. In this study, the key enzymes involved in PAH degradation were brought together from different arctic strains for the biodegradation of highly contaminated soil. These enzymes were produced via a multi-culture of psychrophilic Pseudomonas and Rhodococcus strains. As a result of biosurfactant production, the removal of pyrene was sufficiently prompted by Alcanivorax borkumensis. The key enzymes (e.g., naphthalene dioxygenase, pyrene dioxygenase, catechol-2,3 dioxygenase, 1-hydroxy-2-naphthoate hydroxylase, protocatechuic acid 3,4-dioxygenase) obtained via multi-culture were characterized by tandem LC-MS/MS and kinetic studies. To simulate in situ application of produced enzyme solutions, pyrene- and dilbit-contaminated soil was bioremediated in soil columns and flask tests by injecting enzyme cocktails from the most promising consortia. The enzyme cocktail contained about 35.2 U/mg protein pyrene dioxygenase, 61.4 U/mg protein naphthalene dioxygenase, 56.5 U/mg protein catechol-2,3-dioxygenase, 6.1 U/mg protein 1-hydroxy-2-naphthoate hydroxylase, and 33.5 U/mg protein protocatechuic acid (P3,4D) 3,4-dioxygenase enzymes. It was found that after 6 weeks, the average pyrene removal values showed that the enzyme solution could be effective in the soil column system (80-85% degradation of pyrene).
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Affiliation(s)
- Seyyed Mohammadreza Davoodi
- Department of Civil Engineering, Lassonde School of Engineering, York University, North York, Toronto, ON, M3J 1P3, Canada
| | - Saba Miri
- Department of Civil Engineering, Lassonde School of Engineering, York University, North York, Toronto, ON, M3J 1P3, Canada
| | - Satinder Kaur Brar
- Department of Civil Engineering, Lassonde School of Engineering, York University, North York, Toronto, ON, M3J 1P3, Canada.
| | - Richard Martel
- INRS-ETE, Université du Québec, 490, Rue de La Couronne, Québec, G1K 9A9, Canada
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11
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Nkomzwayo T, Mguni LL, Liu X, Liu R, Yao Y. Competitive Adsorption in a Multicomponent Diesel System Using Nickel Oxide/Activated Carbon. Ind Eng Chem Res 2023. [DOI: 10.1021/acs.iecr.2c03745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Affiliation(s)
- Thulisile Nkomzwayo
- Institute for the Development of Energy for African Sustainability (IDEAS), University of South Africa, Florida Campus,
Private Bag X6, Roodepoort 1710, South Africa
- Council for Scientific and Industrial Research (CSIR), Scientia Campus, Private Bag 395, Brummeria 0001, South Africa
| | - Liberty L. Mguni
- Institute for the Development of Energy for African Sustainability (IDEAS), University of South Africa, Florida Campus,
Private Bag X6, Roodepoort 1710, South Africa
| | - Xinying Liu
- Institute for the Development of Energy for African Sustainability (IDEAS), University of South Africa, Florida Campus,
Private Bag X6, Roodepoort 1710, South Africa
| | - Ran Liu
- Institute for the Development of Energy for African Sustainability (IDEAS), University of South Africa, Florida Campus,
Private Bag X6, Roodepoort 1710, South Africa
- International Joint Laboratory of New Energy, College of Chemical and Pharmaceutical Engineering, Hebei University of Science & Technology, Shijiazhuang 050018, China
| | - Yali Yao
- Institute for the Development of Energy for African Sustainability (IDEAS), University of South Africa, Florida Campus,
Private Bag X6, Roodepoort 1710, South Africa
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12
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Kouchakinejad R, Shariati S, Abolhasani J, Kalhor EG, Vardini MT. Core-shells of magnetite nanoparticles decorated by SBA-3-SO3H mesoporous silica for magnetic solid phase adsorption of paraquat herbicide from aqueous solutions. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128709] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Mallakpour S, Lormahdiabadi M. Removal of the Anionic Dye Congo Red from an Aqueous Solution Using a Crosslinked Poly(vinyl alcohol)-ZnO-Vitamin M Nanocomposite Film: A Study of the Recent Concerns about Nonlinear and Linear Forms of Isotherms and Kinetics. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:4065-4076. [PMID: 35319893 DOI: 10.1021/acs.langmuir.2c00091] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
This paper deals with the preparation, characterization, and application of a crosslinked poly(vinyl alcohol)/ZnO-vitamin M (PVA/ZnO-VM) nanocomposite film for the removal of Congo red (CR) from an aqueous solution. The characterization of a crosslinked PVA/ZnO-VM nanocomposite film showed that the structure became more regular and also the surface morphology appeared smooth in comparison with pure PVA. The obtained data from Brunauer-Emmett-Teller (BET) proved the mesoporous structure for this nanocomposite film. Several effective factors were examined for the adsorption ability of the nanocomposite film, including solution pH (2-10), sorbent amount (0.02-0.08 g), contact time (3-240 min), initial concentration of the adsorbate (30-300 mg·L-1), and temperature (318-358 K). The optimal conditions are as follows: pH = 10, adsorbent amount = 0.06 g, and C0 = 200 mg·L-1. The removal efficiency of the nanocomposite film was 92% after 4 h at the ambient temperature. To interpret the adsorption process, nonlinear and linear forms of kinetic and isotherm models were considered. The obtained data followed nonlinear pseudo-second-order and linear Langmuir isotherm models, which indicated the monolayer formation of CR over the crosslinked PVA/ZnO-VM nanocomposite film with the maximum adsorption capacity of about 56.49 mg·g-1. Also, the adsorption process of CR by the crosslinked PVA/ZnO-VM nanocomposite film is a spontaneous and exothermic reaction.
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Affiliation(s)
- Shadpour Mallakpour
- Organic Polymer Chemistry Research Laboratory, Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Islamic Republic of Iran
| | - Maryam Lormahdiabadi
- Organic Polymer Chemistry Research Laboratory, Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Islamic Republic of Iran
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14
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Diagboya PN, Mtunzi FM, Adebowale KO, Düring RA, Olu-Owolabi BI. Comparative empirical evaluation of the aqueous adsorptive sequestration potential of low-cost feldspar-biochar composites for ivermectin. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2021.127930] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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15
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Sahu S, Yadav MK, Gupta AK, Uddameri V, Toppo AN, Maheedhar B, Ghosal PS. Modeling defluoridation of real-life groundwater by a green adsorbent aluminum/olivine composite: Isotherm, kinetics, thermodynamics and novel framework based on artificial neural network and support vector machine. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 302:113965. [PMID: 34731705 DOI: 10.1016/j.jenvman.2021.113965] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 10/10/2021] [Accepted: 10/16/2021] [Indexed: 06/13/2023]
Abstract
The kinetic, isotherm, and thermodynamics of adsorptive removal of fluoride from the real-life groundwater was evaluated to assess the applicability of a green adsorbent, aluminum/olivine composite (AOC). The isotherm and kinetics were demonstrated by the Freundlich and Elovich model indicating significant surface heterogeneity of AOC in favouring the fluoride sorption. The fluoride removal efficiency of AOC was achieved as 87.5% after 240 min of contact time. The diffusion kinetic model exhibited that both the intra-particle and film diffusion together control the rate-limiting step of fluoride adsorption. A negative value of ΔG0 (-19.919 kJ/mol) at 303 K confirmed the spontaneous adsorption reaction of fluoride, and its endothermic nature was supported by the negative value of ΔH0 (39.504 kJ/mol). A novel framework for a predictive model by artificial neural network (ANN), and support vector machine (SVM) considering the real and synthetic fluoride-containing water was developed to assess the efficiency of adsorbent under different scenarios. ANN model was observed to be statistically significant (RMSE: 1.0955 and R2: 0.9982) and the proposed method may be instrumental in a similar area for benchmarking the synthetic and real-life samples. The low desorption potential of the spent adsorbent exhibited safe disposal of sludge and the secondary-pollutant-free treated water by the efficient and green adsorbent AOC enhanced the field-scale applicability of the green technology.
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Affiliation(s)
- Saswata Sahu
- School of Water Resources, Indian Institute of Technology, Kharagpur, Kharagpur, 721 302, India.
| | - Manoj Kumar Yadav
- School of Environmental Science and Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721 302, India.
| | - Ashok Kumar Gupta
- Environmental Engineering Division, Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721 302, India.
| | - Venkatesh Uddameri
- Department of Civil, Environmental and Construction Engineering, Texas Tech University, Lubbock, TX, 79409, USA.
| | - Ashish Navneet Toppo
- Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721 302, India.
| | - Bellum Maheedhar
- Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721 302, India.
| | - Partha Sarathi Ghosal
- School of Water Resources, Indian Institute of Technology, Kharagpur, Kharagpur, 721 302, India.
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16
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Mo L, Wang Q, Bi E. Effects of endogenous and exogenous dissolved organic matter on sorption behaviors of bisphenol A onto soils. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 287:112312. [PMID: 33711663 DOI: 10.1016/j.jenvman.2021.112312] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 02/10/2021] [Accepted: 03/01/2021] [Indexed: 06/12/2023]
Abstract
The transport of organic contaminants in groundwater might be greatly affected by coexistence of dissolved organic matter (DOM) from different sources. In this study, the effects of endogenous and exogenous DOMs (referred to as DOMen and DOMex, respectively) on sorption behavior of bisphenol A (BPA) onto two reference soils were investigated by batch experiments and microscopic characterization. The results showed that BPA sorption onto soils was dominated by soil organic matter content and affected by DOM properties. The effect of DOMen on BPA sorption was also related to the inorganic components of the two soils. The decrease of organic matter content reduced the sorption capacity of fluvo-aquic soil. However, because the content of available inorganic components in black soil was high, after removing DOMen, more inorganic sites were exposed to increase the sorption capacity. In addition, DOMen could form complexes with BPA in solution, thus the removal of DOMen promoted BPA sorption onto black soil. Under the experimental conditions, contribution of DOMex to the total sorption of BPA onto both soils was not more than 30%. Results of dialysis experiments and soil sorption experiments indicated that effects of coexisting DOMex on BPA sorption was related to the affinity of DOMex to soils and complexation of BPA and DOMex. Since the affinity of DOMex to fluvo-aquic soil was relatively low, the complex of BPA and DOMex in solution was the main inhibition mechanism for BPA sorption. For black soil, higher complexation proportion of BPA with DOMex adsorbed onto soil which promoted BPA sorption onto soil. The findings are of significance for understanding the co-migration of DOM with BPA through soils.
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Affiliation(s)
- Limei Mo
- School of Water Resources and Environment, Beijing Key Laboratory of Water Resources and Environmental Engineering, And MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing, 100083, PR China.
| | - Qiaohui Wang
- School of Water Resources and Environment, Beijing Key Laboratory of Water Resources and Environmental Engineering, And MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing, 100083, PR China.
| | - Erping Bi
- School of Water Resources and Environment, Beijing Key Laboratory of Water Resources and Environmental Engineering, And MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing, 100083, PR China.
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17
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Bao ZZ, Chen ZF, Zhong Y, Wang G, Qi Z, Cai Z. Adsorption of phenanthrene and its monohydroxy derivatives on polyvinyl chloride microplastics in aqueous solution: Model fitting and mechanism analysis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 764:142889. [PMID: 33138997 DOI: 10.1016/j.scitotenv.2020.142889] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 09/28/2020] [Accepted: 10/03/2020] [Indexed: 06/11/2023]
Abstract
The pervasiveness of microplastics, which can absorb pollutants, has a certain impact on pollutant migration in natural waters. Differences in functional groups, such as the hydroxyl group, of pollutants will affect their adsorption on microplastics. In this study, the adsorption of phenanthrene (PHE) or its monohydroxy derivatives, including 1-hydroxyphenanthrene (1-OHP), 2-hydroxyphenanthrene (2-OHP), 4-hydroxyphenanthrene (4-OHP), and 9-hydroxyphenanthrene (9-OHP), on polyvinyl chloride (PVC, measured mean particle size = 134 μm) microplastics was studied. The adsorption efficiency of PHE was shown to be higher than that of either of OHPs. A better fit for pseudo-second-order and Freundlich isotherm models was obtained, indicating different binding sites on the surface of PVC microplastics. The adsorption processes of PHE and OHPs on PVC microplastics were demonstrated to be exothermic and spontaneous. Combined with FT-IR analysis, theoretical calculation, and comparative adsorption experiments, hydrophobic interaction was the dominant mechanism during the adsorption process. In contrast, electrostatic repulsion, CH/π interaction, and halogen bonding played a minor role, to an extent, in the adsorption of PHE/OHPs on PVC microplastics. These findings indicate the influence of the hydroxyl group on adsorption and improve the understanding of interactions between PVC microplastics and PHE/OHPs.
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Affiliation(s)
- Zhen-Zong Bao
- Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Zhi-Feng Chen
- Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
| | - Yuanhong Zhong
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Guangzhao Wang
- Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology of Chongqing, School of Electronic Information Engineering, Yangtze Normal University, Chongqing 408100, China
| | - Zenghua Qi
- Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Zongwei Cai
- Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China; State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Hong Kong Special Administrative Region, China.
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18
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Synthesis of a cleaner potassium hydroxide-activated carbon from baobab seeds hulls and investigation of adsorption mechanisms for diuron. SCIENTIFIC AFRICAN 2020. [DOI: 10.1016/j.sciaf.2020.e00476] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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19
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Residue Char Derived from Microwave-Assisted Pyrolysis of Sludge as Adsorbent for the Removal of Methylene Blue from Aqueous Solutions. Processes (Basel) 2020. [DOI: 10.3390/pr8080979] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Residue char is the main by-product of the microwave-assisted pyrolysis of activated sludge and it has a high content of fixed carbon and porous structure, but little is known about its character as an absorbent. In this study, residue char of activated sludge with microwave-assisted pyrolysis was used as an adsorbent to absorb methylene blue. The effects of pyrolysis temperature, pyrolysis holding time, contact time, and adsorption temperature on the adsorption ability of residue char were investigated. Kinetics, isotherm, and thermodynamic models were also included to study the adsorption behavior. The results showed that the optimal pyrolysis condition was 15 min and 603 °C, and the adsorption capacity reached up to 80.01 mg/g. The kinetics analyses indicated the adsorption behavior followed the pseudo-second-order kinetics model and the adsorption process was mainly due to chemical interaction. The adsorption isotherm was described by Freundlich model and thus, its process was multimolecular layer adsorption. Furthermore, the thermodynamics parameters (ΔG0, ΔH0, and ΔS0) at different temperatures indicated that the nature of the adsorption process was endothermic and spontaneous.
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20
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Barakat A, Ennaji W, Krimissa S, Bouzaid M. Heavy metal contamination and ecological-health risk evaluation in peri-urban wastewater-irrigated soils of Beni-Mellal city (Morocco). INTERNATIONAL JOURNAL OF ENVIRONMENTAL HEALTH RESEARCH 2020; 30:372-387. [PMID: 30977689 DOI: 10.1080/09603123.2019.1595540] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Accepted: 03/12/2019] [Indexed: 06/09/2023]
Abstract
The present study evaluated the metal contamination and its detrimental effects in agricultural soils irrigated by wastewater at the region of Béni-Mellal. A set of soil proprieties (texture, pH, EC, OM, CaCO3) and heavy metals (Cd, Cr, Cu, Pb, Zn, Fe) were measured. Soil contamination level and risks were assessed using geoaccumulation index (Igeo), contamination factor (CF), enrichment factor (EF) and pollution load index (PLI), ecological risk (RI), hazard quotient (HQ), and non-carcinogenic risk (HI) for ingestion exposure. Results showed that mean levels of all metal elements, except Pb, in agricultural soils were higher than the local background values. Igeo, CF and EF indices revealed a moderate to high soil contamination by heavy metals, as confirmed by PLI index suggesting an anthropogenic source of these elements. The RI index indicated a considerable ecological risk, whereas HQ and HI indices suggested no obvious non-carcinogenic risk to adults and non-carcinogenic risk to the children population.
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Affiliation(s)
- Ahmed Barakat
- GEORE laboratory, Faculty of Sciences and Techniques, Sultan My Slimane University , Béni-Mellal, Morocco
| | - Widad Ennaji
- GEORE laboratory, Faculty of Sciences and Techniques, Sultan My Slimane University , Béni-Mellal, Morocco
| | - Samira Krimissa
- Polydisciplinary Faculty, Sultan My Slimane University , Béni-Mellal, Morocco
| | - Mustapha Bouzaid
- Chemistry department, Faculty of Sciences and Techniques, Sultan My Slimane University , Béni-Mellal, Morocco
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21
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Yadav MK, Gupta AK, Ghosal PS, Mukherjee A. Remediation of carcinogenic arsenic by pyroaurite-based green adsorbent: isotherm, kinetic, mechanistic study, and applicability in real-life groundwater. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:24982-24998. [PMID: 32342408 DOI: 10.1007/s11356-020-08868-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Accepted: 04/13/2020] [Indexed: 06/11/2023]
Abstract
The removal of the harmful carcinogen arsenic from drinking water by a green technology is a major concern in the field of environmental engineering. The sorptive profile of arsenic remediation by calcined Mg-Fe-layered double hydroxide, fabricated by a one-pot synthesis technique, was investigated to delineate its applicability in real-life water. The physicochemical properties of adsorbent, as demonstrated from spectroscopy and microscopy, which described the existence of amorphous material with significant surface roughness possess selectivity towards arsenic. The isotherm and kinetic along with thermodynamic modeling exhibited the occurrence of spontaneous (ΔG0 value = - 8.084 kJ/mol to - 10.942 kJ/mol), endothermic (ΔH0 value = 12.135 kJ/mol), and physisorption reactions (Ead = 4.103-5.832 kJ/mol, Ea = 11.546 kJ/mol, S* = 0.0005 << 1, and ΔHx = 9.23-16.29 kJ/mol) with high uptake rate and adsorption potential of adsorbent. The isotherm and kinetics were demonstrated by Temkin (R2 = 0.944-0.969) and Elovich (R2 = 0.996-0.998) models, respectively, with high statistical significance. The intraparticle diffusion model which established the rate-limiting step is the combination of both film and pore diffusions. The applicability of layered double hydroxide (LDH) material in the real-life water was confirmed by isotherm and kinetic modeling along with the regeneration/reuse potential. The adsorptive removal of arsenic by the LDH material exhibited to be a promising technique without creating any secondary hazard.
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Affiliation(s)
- Manoj Kumar Yadav
- School of Environmental Science and Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Ashok Kumar Gupta
- Department of Civil Engineering, Environmental Engineering Division, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India.
| | - Partha Sarathi Ghosal
- School of Water Resources, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Abhijit Mukherjee
- School of Environmental Science and Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
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22
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Yang X, Lin H, Zhang Y, He Z, Dai X, Zhang Z, Li Y. Sorption and desorption of seven steroidal synthetic progestins in five agricultural soil-water systems. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 196:110586. [PMID: 32272348 DOI: 10.1016/j.ecoenv.2020.110586] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 03/29/2020] [Accepted: 04/01/2020] [Indexed: 06/11/2023]
Abstract
Manure fertilization and wastewater irrigation can introduce the biologically potent synthetic progestins into agricultural soils, causing endocrine disruption in organisms of nearby surface waters. Therefore, this study investigated the sorption and desorption potential of etonogestrel, medroxyprogesterone, gestodene, norgestrel, cyproterone acetate, levonorgestrel, and dienogest in five agricultural soil-water systems. Sorption data were well-described by the linear sorption model. In most batch systems, cyproterone acetate exhibited the highest affinities for soils, followed by etonogestrel, medroxyprogesterone, levonorgestrel, gestodene, norgestrel, and dienogest. The sorption magnitudes (logKoc or logKd) were significantly correlated with the progestin hydrophobicities (R2 = 0.72-0.86, p < 0.05). The Kd values of the progestins were also significantly correlated with organic carbon content and pore volumes of the soils (R2 = 0.68-0.98, p < 0.05). In addition, 0.5 M urea resulted in 3-19% decreases in Kd values of the progestins. Taken together, these data indicated that hydrophobic partitioning interaction, hydrogen bonding interaction, and pore filling were the sorption mechanisms for the progestins in soil-water systems. No significant desorption hysteresis was observed for the progestins, indicating that they can be readily desorbed under rainfall or irrigation events. Based on the sorption and desorption data, we estimated the dynamic transport of the progestins in conventional agricultural management systems, and predicted the concentrations of the progestins as a function of soil-sorbed concentration, water-soil ratio, and dilution factor of receiving waters. This study will improve the understanding of the risks posed by the progestins under field-scale hydrological conditions.
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Affiliation(s)
- Xingjian Yang
- College of Natural Resources and Environment, Joint Institute for Environment & Education, South China Agricultural University, Guangzhou, 510642, PR China.
| | - Hang Lin
- College of Natural Resources and Environment, Joint Institute for Environment & Education, South China Agricultural University, Guangzhou, 510642, PR China
| | - Yulong Zhang
- College of Natural Resources and Environment, Joint Institute for Environment & Education, South China Agricultural University, Guangzhou, 510642, PR China
| | - Zhili He
- College of Natural Resources and Environment, Joint Institute for Environment & Education, South China Agricultural University, Guangzhou, 510642, PR China
| | - Xiong Dai
- College of Natural Resources and Environment, Joint Institute for Environment & Education, South China Agricultural University, Guangzhou, 510642, PR China
| | - Zhen Zhang
- College of Natural Resources and Environment, Joint Institute for Environment & Education, South China Agricultural University, Guangzhou, 510642, PR China
| | - Yongtao Li
- College of Natural Resources and Environment, Joint Institute for Environment & Education, South China Agricultural University, Guangzhou, 510642, PR China.
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23
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Nagarajan D, Venkatanarasimhan S. Kinetics and mechanism of efficient removal of Cu(II) ions from aqueous solutions using ethylenediamine functionalized cellulose sponge. Int J Biol Macromol 2020; 148:988-998. [PMID: 31972194 DOI: 10.1016/j.ijbiomac.2020.01.177] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2019] [Revised: 01/11/2020] [Accepted: 01/18/2020] [Indexed: 10/25/2022]
Abstract
The present work elucidates achieving superior Cu(II) adsorption capacity using a facile protocol and a biodegradable material. Copper is one of the most prevalent metals used in industries, which creates severe health effects to the human and aquatic lives when present in excess. Cellulose sponge (CS) used as kitchen wipe was chosen and amine functionalities were introduced on it using ethylenediamine. Potentiality of the amine functionalized cellulose sponge (AF-CS) in Cu(II) removal is investigated for the first time. The batch adsorption parameters were optimized and various nonlinear kinetic and isotherm models were elaborately studied. The adsorption using CS and AF-CS behaved under a pseudo-second-order model and followed chemisorption. The maximum adsorption capacity values using AF-CS and CS from the Langmuir isotherm model were calculated to be 596.96 mg/g and 230.63 mg/g, respectively. Thence, AF-CS possesses proportionately higher adsorption capacity in comparison with CS due to the insertion of -NH2 groups. Further, the mechanism involved in the adsorption process was explored in detail through FESEM, FT-IR, FT-Raman and TGA analysis. The AF-CS sponge was stable on repeated use and retained 90% efficiency at the end of the 10th cycle. A highly effective, easily recyclable, biodegradable and cost-effective adsorbent has been synthesized possessing an extraordinarily high adsorption capacity towards Cu(II) ions.
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Affiliation(s)
- Durgadevi Nagarajan
- Department of Sciences, Amrita School of Engineering, Coimbatore, Amrita Vishwa Vidyapeetham, India
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24
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Ciğeroğlu Z, Haşimoğlu A, Özdemir OK. Synthesis, characterization and an application of graphene oxide nanopowder: methylene blue adsorption and comparison between experimental data and literature data. J DISPER SCI TECHNOL 2020. [DOI: 10.1080/01932691.2019.1710526] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Zeynep Ciğeroğlu
- Department of Chemical Engineering, Engineering Faculty, Uşak University, Uşak, Turkey
| | - Aydın Haşimoğlu
- Nanotechnology Research Center, Gebze Institute of Technology, Kocaeli, Turkey
| | - Oğuz Kaan Özdemir
- Department of Metallurgy and Material Science Engineering, Chemical-Mettalurgy Faculty, Yildiz Technical University, Istanbul, Turkey
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25
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Synthesis, characterization, and application of β-cyclodextrin-based ion-imprinted polymer for selective sequestration of Cr(VI) ions from aqueous media: Kinetics and isotherm studies. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.111991] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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26
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Zheng Y, Wang J, Wang Y, Zhou H, Pu Z, Yang Q, Huang W. The Combination of MoS 2/WO 3 and Its Adsorption Properties of Methylene Blue at Low Temperatures. Molecules 2019; 25:molecules25010002. [PMID: 31861262 PMCID: PMC6982728 DOI: 10.3390/molecules25010002] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 12/10/2019] [Accepted: 12/16/2019] [Indexed: 02/03/2023] Open
Abstract
It was found previously that neither monomer MoS2 nor WO3 is an ideal material for the adsorption of organic dyes, while MoS2/WO3 composites synthesized by a two-step hydrothermal method have outstanding adsorption effects. In this work, the chemical state of each element was found to be changed after combination by X-ray photoelectron spectroscopy analysis, which lead to their differences in adsorption performance. Moreover, the adsorption test of methylene blue on MoS2/WO3 composites was carried out under a series of temperatures, showing that the prepared composites also had appreciable adsorption rates at lower temperatures. The adsorption process could be well described by the Freundlich isothermal model and the pseudo-second order model. In addition, the particle-internal diffusion model simulation revealed that the internal diffusion of the particles played an important role in the whole adsorption process.
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Affiliation(s)
- Yifan Zheng
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China; (Y.Z.); (J.W.); (Y.W.); (H.Z.); (Z.P.); (Q.Y.)
- Research Center of Analysis and Measurement, Zhejiang University of Technology, Hangzhou 310014, China
| | - Jingjing Wang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China; (Y.Z.); (J.W.); (Y.W.); (H.Z.); (Z.P.); (Q.Y.)
| | - Yedan Wang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China; (Y.Z.); (J.W.); (Y.W.); (H.Z.); (Z.P.); (Q.Y.)
| | - Huan Zhou
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China; (Y.Z.); (J.W.); (Y.W.); (H.Z.); (Z.P.); (Q.Y.)
- Research Center of Analysis and Measurement, Zhejiang University of Technology, Hangzhou 310014, China
| | - Zhiying Pu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China; (Y.Z.); (J.W.); (Y.W.); (H.Z.); (Z.P.); (Q.Y.)
- Research Center of Analysis and Measurement, Zhejiang University of Technology, Hangzhou 310014, China
| | - Qian Yang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China; (Y.Z.); (J.W.); (Y.W.); (H.Z.); (Z.P.); (Q.Y.)
- Research Center of Analysis and Measurement, Zhejiang University of Technology, Hangzhou 310014, China
| | - Wanzhen Huang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China; (Y.Z.); (J.W.); (Y.W.); (H.Z.); (Z.P.); (Q.Y.)
- Research Center of Analysis and Measurement, Zhejiang University of Technology, Hangzhou 310014, China
- Correspondence: ; Tel.: +86-0571-8887-1097
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Sreedhar I, Reddy NS. Heavy metal removal from industrial effluent using bio-sorbent blends. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-1057-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
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Mor S, Negi P, Ravindra K. Potential of agro-waste sugarcane bagasse ash for the removal of ammoniacal nitrogen from landfill leachate. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:24516-24531. [PMID: 31230249 DOI: 10.1007/s11356-019-05563-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Revised: 05/11/2019] [Accepted: 05/23/2019] [Indexed: 06/09/2023]
Abstract
Ammoniacal nitrogen is considered as one of the major pollutants of the leachate generated from the landfill site and has the potential to deteriorate the environment as well as health. Considering this, locally available agricultural waste, i.e., sugarcane bagasse ash, was employed as an adsorbent for the removal of ammoniacal nitrogen from landfill leachate. Batch-mode experiments were conducted to see the effect of dose (2-60 g L-1), pH (2-12), and temperature (20-60 °C) on ammoniacal nitrogen adsorption. Application of sugarcane bagasse ash showed 60% removal of ammoniacal nitrogen (50 mg L-1 strength) at an optimum dose of 20 g L-1 and 180 min of contact time with an adsorption capacity of 0.31 mg g-1. The Langmuir adsorption model was found to be best fit at 40 °C with R2 = 0.944, depicting a monolayer coverage of ammoniacal nitrogen onto sugarcane bagasse ash. According to the result, solute uptake rate could be well described by the pseudo-second-order model (R2 = 0.928), whereas the intraparticle diffusion model and Boyd plot indicated that the overall adsorption rate is governed by the external mass transfer. Thermodynamic studies revealed that adsorption is feasible, spontaneous, and endothermic in nature. Hence, the study shows that sugarcane bagasse ash could turn out to be a cost-effective adsorbent for the removal of ammoniacal nitrogen from leachate.
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Affiliation(s)
- Suman Mor
- Department of Environment Studies, Panjab University, Chandigarh, 160014, India
- Centre for Public Health, Panjab University (PU), Chandigarh, 160025, India
| | - Pooja Negi
- Department of Environment Studies, Panjab University, Chandigarh, 160014, India
| | - Khaiwal Ravindra
- School of Public Health, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh, 160012, India.
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Hylocereus polyrhizus peel's high-methoxyl pectin: A potential source of hypolipidemic agent. Int J Biol Macromol 2019; 134:361-367. [DOI: 10.1016/j.ijbiomac.2019.03.143] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 02/25/2019] [Accepted: 03/21/2019] [Indexed: 12/19/2022]
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30
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El Maataoui Y, El M'rabet M, Maaroufi A, Dahchour A. Spiramycin adsorption behavior on activated bentonite, activated carbon and natural phosphate in aqueous solution. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:15953-15972. [PMID: 30963430 DOI: 10.1007/s11356-019-05021-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Accepted: 03/27/2019] [Indexed: 06/09/2023]
Abstract
Efficacy of activated bentonite, activated carbon, and natural phosphate under experimental conditions was tested as low-cost adsorbents for spiramycin antibiotic removal from aqueous solution. Equilibrium kinetic and isotherm adsorption process are well described by pseudo-second order and Langmuir isotherm models for activated bentonite and activated carbon, while natural phosphate follows pseudo-first order and Freundlich models, respectively. Obtained results revealed that activated bentonite has the highest adsorption capacity (260.3 mg/g) as compared to activated carbon (80.3 mg/g) and natural phosphate (1.7 mg/g). The adsorption capacity decreases for all adsorbents in the presence of NaCl. The adsorption processes are facilitated in the alkaline pH range for activated bentonite and activated carbon, whereas, for natural phosphate, the acidic pH range is favorable. They are involving ion exchange and hydrogen bond mechanisms as well as Van der Waals forces and also π interactions for activated carbon. Thermodynamic calculation shows that spiramycin adsorption is endothermic and spontaneous on all adsorbents. The activated bentonite reusability is more efficient by more than 95% in two-step desorption using NaOH and HCl eluents compared to activated carbon. Thus, activated bentonite is a promising adsorbent for spiramycin removal from aqueous solution.
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Affiliation(s)
- Yassine El Maataoui
- Laboratory of Composite Materials, Polymers and Environment, Faculty of Sciences, University of Mohammed V, 4 Avenue Ibn Battouta, P.O. Box 1014, 10000, Rabat, Morocco
- Department of Fundamental and Applied Sciences, Hassan II Agronomy and Veterinary Institute, Madinat Al Irfane, P.O. Box 6202, 10101, Rabat, Morocco
| | - Mohamadine El M'rabet
- Department of Fundamental and Applied Sciences, Hassan II Agronomy and Veterinary Institute, Madinat Al Irfane, P.O. Box 6202, 10101, Rabat, Morocco
| | - Abdelkrim Maaroufi
- Laboratory of Composite Materials, Polymers and Environment, Faculty of Sciences, University of Mohammed V, 4 Avenue Ibn Battouta, P.O. Box 1014, 10000, Rabat, Morocco.
| | - Abdelmalek Dahchour
- Department of Fundamental and Applied Sciences, Hassan II Agronomy and Veterinary Institute, Madinat Al Irfane, P.O. Box 6202, 10101, Rabat, Morocco
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31
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Ibrahim RK, El-Shafie A, Hin LS, Mohd NSB, Aljumaily MM, Ibraim S, AlSaadi MA. A clean approach for functionalized carbon nanotubes by deep eutectic solvents and their performance in the adsorption of methyl orange from aqueous solution. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 235:521-534. [PMID: 30716672 DOI: 10.1016/j.jenvman.2019.01.070] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 01/11/2019] [Accepted: 01/17/2019] [Indexed: 05/18/2023]
Abstract
In this study two deep eutectic solvents (DESs) were prepared using ethylene glycol (EG) and two different ammonium-based salts. The potential of these DESs as novel agents for CNTs functionalization was examined by performing a comprehensive characterization study to identify the changes developing after the functionalization process. The impact of DESs was obvious by increasing the surface area of CNTs to reach 197.8 (m2/g), and by adding new functional groups to CNTs surface without causing any damage to the unique structure of CNTs. Moreover, CNTs functionalized with DESs were applied as new adsorbents for the removal of methyl orange (MO) from water. The adsorption conditions were optimized using RSM-CCD experimental design. The kinetics and the equilibrium adsorption data were analyzed using different kinetic and isotherm models. According to the regression results, adsorption kinetics data were well described by pseudo-second order model, whereas adsorption isotherm data were best represented by Langmuir isotherm model. The highest recorded maximum adsorption capacity (qmax) value was found to be 310.2 mg/g.
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Affiliation(s)
- Rusul Khaleel Ibrahim
- Department of Civil Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia.
| | - Ahmed El-Shafie
- Department of Civil Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia
| | - Lai Sai Hin
- Department of Civil Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia
| | | | - Mustafa Mohammed Aljumaily
- Nanotechnology & Catalysis Research Centre (NANOCAT), University of Malaya, Kuala Lumpur 50603, Malaysia
| | - Shaliza Ibraim
- Department of Civil Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia
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32
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Wu P, Cai Z, Jin H, Tang Y. Adsorption mechanisms of five bisphenol analogues on PVC microplastics. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 650:671-678. [PMID: 30212696 DOI: 10.1016/j.scitotenv.2018.09.049] [Citation(s) in RCA: 328] [Impact Index Per Article: 54.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 09/03/2018] [Accepted: 09/04/2018] [Indexed: 05/06/2023]
Abstract
Polyvinyl chloride (PVC) plastics are easily embrittled and decomposed to microplastics in an aquatic environment. The plasticizers such as bisphenol A (BPA), bisphenol S (BPS) and their analogues might be released and adsorbed by the PVC microplastics causing consequential pollution to the ecosystem. Herein, a systematic study was performed to determine the adsorption mechanisms of five bisphenol analogues (BPA, BPS, BPF, BPB and BPAF) on PVC microplastics. The maximum adsorption efficiency reached 0.19 ± 0.02 mg·g-1 (BPA), 0.15 ± 0.01 mg·g-1 (BPS), 0.16 ± 0.01 mg·g-1 (BPF), 0.22 ± 0.01 mg·g-1 (BPB), and 0.24 ± 0.02 mg·g-1 (BPAF) at PVC dosage of 1.5 g·L-1. The kinetics study shows that the adsorption processes can be divided into three stages including external mass transport, intraparticle diffusion and dynamic equilibrium. The isotherm modeling shows a better fit of the adsorption results to the Freundlich isotherm compared to the Langmuir model. The thermodynamic study indicates the adsorption of all bisphenols as exothermic processes. Furthermore, the adsorption mechanisms of bisphenols were explicated intensively, with respect to hydrophobic interactions, electrostatic forces, and noncovalent bonds. A positive effect of hydrophobic interactions was identified for bisphenols adsorption on PVC microplastics, but an obvious inhibition by electrostatic repulsions was revealed for BPF due to its ionization in the neutral solution. In addition, noncovalent bonds (hydrogen and halogen bonds) may promote the adsorption of bisphenols on PVC microplastics. Finally, the desorption and competitive adsorption of five bisphenol analogues on the microplastics were provided together with a perspective for future works.
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Affiliation(s)
- Pengfei Wu
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, Southern University of Science and Technology, 1088 Xueyuan Blvd, Nanshan District, Shenzhen 518055, PR China; State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Hong Kong, China
| | - Zongwei Cai
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Hong Kong, China.
| | - Hangbiao Jin
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Hong Kong, China; Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, PR China
| | - Yuanyuan Tang
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, Southern University of Science and Technology, 1088 Xueyuan Blvd, Nanshan District, Shenzhen 518055, PR China.
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33
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Piperopoulos E, Calabrese L, Mastronardo E, Abdul Rahim SH, Proverbio E, Milone C. Assessment of sorption kinetics of carbon nanotube‐based composite foams for oil recovery application. J Appl Polym Sci 2018. [DOI: 10.1002/app.47374] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- E. Piperopoulos
- Department of EngineeringUniversity of Messina 98166 Messina Italy
- National Interuniversity Consortium of Materials Science and Technology (INSTM) 50121 Florence Italy
| | - L. Calabrese
- Department of EngineeringUniversity of Messina 98166 Messina Italy
- CNR ITAE Institute 98126 Messina Italy
| | - E. Mastronardo
- Thermochemical Processes UnitIMDEA Energy Institute 28935 Madrid Spain
- Materials Science and EngineeringNorthwestern University 60208 Evanston Illinois
| | - S. H. Abdul Rahim
- National Unit for Environmental Research and Services (NUERS)Kuwait University 5969 Khaldiya Kuwait
| | - E. Proverbio
- Department of EngineeringUniversity of Messina 98166 Messina Italy
- National Interuniversity Consortium of Materials Science and Technology (INSTM) 50121 Florence Italy
| | - C. Milone
- Department of EngineeringUniversity of Messina 98166 Messina Italy
- National Interuniversity Consortium of Materials Science and Technology (INSTM) 50121 Florence Italy
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34
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Seyedhakimi A, Bastami SA, Ghassa S, Razavi H, Chehreh Chelgani S. Exploring relationships between various activations of granular activated carbon on silver and gold adsorption: A kinetic and equilibrium study. SEP SCI TECHNOL 2018. [DOI: 10.1080/01496395.2018.1540635] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- A. Seyedhakimi
- Department of Research & Development, Faravari Pouya Zarcan Agh-Darreh Company, Tehran, Iran
| | - S. A. Bastami
- Department of Research & Development, Faravari Pouya Zarcan Agh-Darreh Company, Tehran, Iran
| | - S. Ghassa
- School of Mining, College of Engineering, University of Tehran, Tehran, Iran
| | - H. Razavi
- Department of mineral processing engineering, Faculty of mining engineering, University of Amirkabir, Tehran, Iran
| | - S. Chehreh Chelgani
- Minerals and Metallurgical Engineering, Dept. of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, Luleå, Sweden
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35
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Miao Q, Bi E. Effects of soil components and solution inorganic cations on interactions of imidazolium-based ionic liquid with soils. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 223:975-983. [PMID: 30096750 DOI: 10.1016/j.jenvman.2018.06.041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 06/09/2018] [Accepted: 06/12/2018] [Indexed: 06/08/2023]
Abstract
Effects of alkyl chain length of ionic liquid (IL), soil components and solution inorganic cations on a selected IL (1-methyl-3-octylimidazolium chloride, [OMIM]Cl) interaction with Chinese soils were investigated using batch sorption experiments. The results indicated that sorption energy was mainly controlled by chain length of [OMIM]Cl and contents of soil organic matter (SOM). [OMIM]Cl sorption on soils was mainly controlled by cation exchange process. Contributions of SOM and clay minerals (CMs) to [OMIM]Cl sorption were 7.3%-53.8% and 46.2%-92.7%, respectively. SOM possessed higher energy cation-exchange binding sites than CMs. To predict the sorption of [OMIM]Cl on soils, a model for the relationship between sorption coefficient (Kd) and cation exchange capacity (CEC) from soil components (SOM and CMs, i.e., CECSOM and CECCMs) as well as solution concentration (Ce) was established: LogKd = Log(1.67*CECSOM + 3.22*CECCMs) - 0.58LogCe. This model could provide a good prediction for sorption coefficients and the prediction errors were within 0.48 log unit. Competitive effects caused by inorganic cations followed the order of Ca2+ = Mg2+ > K+ > Na+. Concentrations and valence of coexisting ions both affect their competitive capability on [OMIM]Cl sorption. The finding of this study provided valuable information for evaluating the fate of [OMIM]Cl in soils.
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Affiliation(s)
- Qiuci Miao
- MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing, 100083, PR China; Beijing Key Laboratory of Water Resources and Environmental Engineering, China University of Geosciences (Beijing), Beijing, 100083, PR China.
| | - Erping Bi
- MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing, 100083, PR China; Beijing Key Laboratory of Water Resources and Environmental Engineering, China University of Geosciences (Beijing), Beijing, 100083, PR China.
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36
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Briones RM, Sarmah AK. Detailed sorption characteristics of the anti-diabetic drug metformin and its transformation product guanylurea in agricultural soils. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 630:1258-1268. [PMID: 29554747 DOI: 10.1016/j.scitotenv.2018.02.306] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 02/26/2018] [Accepted: 02/26/2018] [Indexed: 06/08/2023]
Abstract
Detection of metformin, an antidiabetic drug and its transformation product guanylurea in various environmental matrices such as surface water and groundwater, coupled with their effects on aquatic organisms warrant an understanding of the compounds fate and behaviour in the environment. Batch studies were conducted with the aim of evaluating the sorption of these two emerging contaminants in six New Zealand agricultural soils of contrasting physico-chemical properties. Kinetic studies revealed that metformin and guanylurea sorption in Te Kowhai soil was very rapid initially achieving 90% sorption within the first 4 and 13h, respectively. Fit of several isotherm models to the measured batch sorption data showed that the hybrid models Langmuir-Freundlich and Redlich-Peterson best described the isotherms. Freundlich isotherm showed higher linearity for guanylurea (nF=0.58-0.93) in all soils compared to metformin (nF=0.25-0.71). A linear isotherm was fitted at environmentally relevant low concentrations (< 3mg/L) of target compounds and calculated values of sorption distribution coefficient (Kd) were in the range of 8.97 to 53.49L/kg for metformin and between 10.6 and 37.51L/kg for guanylurea. Sorption of both metformin and guanylurea was dependent on the soil characteristics, however, no generalisation could be made as to which had higher affinity to soils studied. Pearson's correlation and multiple regression analyses indicate that Si/Al (p=0.042) and clay (p=0.015) significantly influenced metformin Kd values, whereas the soil's cation exchange capacity (p=0.024) is the single most significant factor determining guanylurea sorption in soils. It is likely that the type of minerals present in soils and its ion-exchange capacity could play an important role in metformin and guanylurea sorption, respectively.
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Affiliation(s)
- Rowena M Briones
- Department of Civil & Environmental Engineering, Faculty of Engineering, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Ajit K Sarmah
- Department of Civil & Environmental Engineering, Faculty of Engineering, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand.
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Bruzzoniti MC, Appendini M, Onida B, Castiglioni M, Del Bubba M, Vanzetti L, Jana P, Sorarù GD, Rivoira L. Regenerable, innovative porous silicon-based polymer-derived ceramics for removal of methylene blue and rhodamine B from textile and environmental waters. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:10619-10629. [PMID: 29383645 DOI: 10.1007/s11356-018-1367-x] [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] [Received: 11/02/2017] [Accepted: 01/22/2018] [Indexed: 06/07/2023]
Abstract
The presence of residual color in treated textile wastewater above the regulation limits is still a critical issue in many textile districts. Innovative, polymer-derived ceramics of the Si-C-O system were here synthesized in order to obtain porous nanocomposite materials where a free carbon phase is dispersed into a silicon carbide/silicon oxycarbide network. The sorbents were comprehensively characterized for the removal of two model water-soluble dyes (i.e., the cation methylene blue and the zwitterion rhodamine B). Adsorption is very rapid and controlled by intra-particle and/or film diffusion, depending on dye concentration. Among the nanocomposites studied, the SiOC aerogel (total capacity about 45 mg/g, is easily regenerated under mild treatment (250 °C, 2 h). Adsorption of dyes is not affected by the matrix composition: removals of 150 mg/L methylene blue from river water and simulated textile wastewater with high content of metal ions (2-50 mg/L) and chemical oxygen demand (800 mg/L) were higher than 92% and quantitative for a dye concentration of 1 mg/L.
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Affiliation(s)
| | - Marta Appendini
- Department of Chemistry, University of Turin, Via P. Giuria 7, 10125, Turin, Italy
| | - Barbara Onida
- Department of Applied Science and Technology, Polytechnic of Torino, Corso Duca degli Abruzzi 24, 10129, Turin, Italy
| | - Michele Castiglioni
- Department of Chemistry, University of Turin, Via P. Giuria 7, 10125, Turin, Italy
| | - Massimo Del Bubba
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 3, 50019, Sesto Fiorentino, Italy
| | - Lia Vanzetti
- Fondazione Bruno Kessler-CMM-MNF, Via Sommarive 18, 38123, Trento, Italy
| | - Prasanta Jana
- Department of Industrial Engineering, University of Trento, Via Sommarive 9, 38123, Trento, Italy
| | - Gian Domenico Sorarù
- Department of Industrial Engineering, University of Trento, Via Sommarive 9, 38123, Trento, Italy
| | - Luca Rivoira
- Department of Chemistry, University of Turin, Via P. Giuria 7, 10125, Turin, Italy
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Cipullo S, Prpich G, Campo P, Coulon F. Assessing bioavailability of complex chemical mixtures in contaminated soils: Progress made and research needs. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 615:708-723. [PMID: 28992498 DOI: 10.1016/j.scitotenv.2017.09.321] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Revised: 09/29/2017] [Accepted: 09/29/2017] [Indexed: 05/13/2023]
Abstract
Understanding the distribution, behaviour and interactions of complex chemical mixtures is key for providing the evidence necessary to make informed decisions and implement robust remediation strategies. Much of the current risk assessment frameworks applied to manage land contamination are based on total contaminant concentrations and the exposure assessments embedded within them do not explicitly address the partitioning and bioavailability of chemical mixtures. These oversights may contribute to an overestimation of both the eco-toxicological effects of the fractions and the mobility of contaminants. In turn, this may limit the efficacy of risk frameworks to inform targeted and proportionate remediation strategies. In this review we analyse the science surrounding bioavailability, its regulatory inclusion and the challenges of incorporating bioavailability in decision making process. While a number of physical and chemical techniques have proven to be valuable tools for estimating bioavailability of organic and inorganic contaminants in soils, doubts have been cast on its implementation into risk management soil frameworks mainly due to a general disagreement on the interchangeable use of bioavailability and bioaccessibility, and the associated methods which are still not standardised. This review focuses on the role of biotic and abiotic factors affecting bioavailability along with soil physicochemical properties and contaminant composition. We also included advantages and disadvantages of different extraction techniques and their implications for bioavailability quantitative estimation. In order to move forward the integration of bioavailability into site-specific risk assessments we should (1) account for soil and contaminant physicochemical characteristics and their effect on bioavailability; (2) evaluate receptor's potential exposure and uptake based on mild-extraction; (3) adopt a combined approach where chemical-techniques are used along with biological methods; (4) consider a simplified and cost-effective methodology to apply at regulatory and industry setting; (5) use single-contaminant exposure assessments to inform and predict complex chemical mixture behaviour and bioavailability.
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Affiliation(s)
- S Cipullo
- Cranfield University, School of Water, Energy and Environment, Cranfield MK43 0AL, UK
| | - G Prpich
- Cranfield University, School of Water, Energy and Environment, Cranfield MK43 0AL, UK
| | - P Campo
- Cranfield University, School of Water, Energy and Environment, Cranfield MK43 0AL, UK
| | - F Coulon
- Cranfield University, School of Water, Energy and Environment, Cranfield MK43 0AL, UK.
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Adesina OA, Sonibare JA, Diagboya PN, Adeniran JA, Yusuf RO. Spatiotemporal distributions of polycyclic aromatic hydrocarbons close to a typical medical waste incinerator. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:274-282. [PMID: 29032527 DOI: 10.1007/s11356-017-0335-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2017] [Accepted: 09/25/2017] [Indexed: 06/07/2023]
Abstract
Environmental contaminations by polycyclic aromatic hydrocarbons (PAHs) especially from incinerators occur subtly, and PAH contribution from this source is underestimated. However, as environmental PAH concentrations build up, this may be a serious concern around the incinerator vicinity due to the potential consequences of PAHs on ecosystems and human health. Thus, the contribution of selected (12) PAHs from the Obafemi Awolowo University Teaching Hospital medical waste incinerator (or source, HWI_0) was determined by sampling stack gas and ambient air around incinerator vicinity from June 2014 to May 2015. Results showed that the 12 PAH source (HWI_0) concentrations were in the range of NA (for phenanthrene, pyrene, anthracene, benz[e]acephenanthrylene, and indeno[2,1-b]chromene) to 10.9 ng/m3 (pyrelene) and generally higher than the receptor points (hospital waste incinerators (HWIs)). The average total PAH concentrations per month at HWI_0 and the receptors-HWI_1, HWI_2, HWI_3, HWI_4 and HWI_5-were 73.0 ± 27.9, 60.4 ± 30.8, 42.5 ± 23.6, 38.7 ± 21.9, 35.0 ± 27.2, and 39.2 ± 22.9 ng/m3, respectively. These results and multivariate receptor model analysis indicated high correlations between source PAH contributions and the receptor points. The PAH concentrations in the dry season were higher than the wet season suggesting that hydrological condition affects ambient PAH concentrations. The average PAH concentrations in the HWIs as well as the cumulative exposure concentrations observed throughout the period are of major health concern because PAH concentrations detected are several times higher than both the European Union standard and the WHO guideline level.
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Affiliation(s)
- Olusola A Adesina
- Department of Chemical & Petroleum Engineering, Afe Babalola University, Ado-Ekiti, Nigeria.
| | - Jacob A Sonibare
- Department of Chemical Engineering, Obafemi Awolowo University, Ile-Ife, Nigeria
| | - Paul N Diagboya
- Department of Chemistry, Vaal University of Technology, Vanderbijlpark, South Africa.
| | - Jamiu A Adeniran
- Department of Chemical Engineering, University of Ilorin, Ilorin, Nigeria
| | - Rafiu O Yusuf
- Department of Chemical Engineering, University of Ilorin, Ilorin, Nigeria
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Evaluation of Inulin Replacing Chitosan in a Polyurethane/Polysaccharide Material for Pb 2+ Removal. Molecules 2017; 22:molecules22122093. [PMID: 29186073 PMCID: PMC6150026 DOI: 10.3390/molecules22122093] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Revised: 11/26/2017] [Accepted: 11/27/2017] [Indexed: 11/16/2022] Open
Abstract
Downstream waste from industry and other industrial processes could increase concentration of heavy metals in water. These pollutants are commonly removed by adsorption because it is an effective and economical method. Previously, we reported adsorption capacity of a chitosan/polyurethane/titanium dioxide (TiO2) composite for three ions in a dynamic wastewater system. There, increasing the chitosan concentration in composite increased the cation removal as well; however, for ratios higher than 50% of chitosan/TiO2, the manufacturing cost increased significantly. In this work, we address the manufacturing cost problem by proposing a new formulation of the composite. Our hypothesis is that inulin could replace chitosan in the composite formulation, either wholly or in part. In this exploratory research, three blends were prepared with a polyurethane matrix using inulin or/and chitosan. Adsorption was evaluated using a colorimetric method and the Langmuir and Freundlich models. Fourier-transform infrared spectroscopy (FTIR) spectra, scanning electron microscopy (SEM) micrographs, differential scanning calorimetry and thermogravimetric analysis curves were obtained to characterize blends. Results indicate that blends are suitable for toxic materials removal (specifically lead II, Pb2+). Material characterization indicates that polysaccharides were distributed in polyurethane’s external part, thus improving adsorption. Thermal degradation of materials was found above 200 °C. Comparing the blends data, inulin could replace chitosan in part and thereby improve the cost efficiency and scalability of the production process of the polyurethane based-adsorbent. Further research with different inulin/chitosan ratios in the adsorbent and experiments with a dynamic system are justified.
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Taimur S, Hassan M, Yasin T. Removal of copper using novel amidoxime based chelating nanohybrid adsorbent. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2017.08.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Adedayo Adesina O, Ademola Sonibare J, Diagboya PN, Adejuwon A, Famubode T, Bello JO. Periodic characterization of alkyl-naphthalenes in stack gas and ambient air around a medical waste incinerator. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:21770-21777. [PMID: 28770505 DOI: 10.1007/s11356-017-9828-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Accepted: 07/24/2017] [Indexed: 06/07/2023]
Abstract
Due to the subtle occurrence of environmental polycyclic aromatic hydrocarbon (PAHs) pollution from incinerators, it is seldom considered a significant source of PAH pollution. However, considering the recent build-up of toxics in urban air, this may be a serious concern around the incinerator vicinity due to the potential consequences of PAHs on human health. Hence, this study determined 11 alkyl-naphthalene contributions from a hospital waste incinerator (HWI_0) into ambient air receptor points (HWI_1 to HWI_5) for a 1-year period: June 2014-May 2015. The HWI_0 and ambient gases were sampled using filter-sorbent sampling system and polyurethane foam (PUF) passive samplers, respectively, and all alkyl-naphthalenes were determined using GC-MS. Results showed that the source concentrations were in the range of 0-14.0 ng/m3 and generally higher than the receptor points. The receptor point concentration trends were mainly HWI_1 > HWI_2 ≥ HWI_3 ≥ HWI_5 ≥ HWI_4. Multivariate receptor model analysis suggested high correlations between source and the receptor points though there might be some significant contributions from other emission sources. The average monthly concentrations (∑alkyl-naphthalene) at HWI_0 and the receptors HWI_1, HWI_2, HWI_3, HWI_4 and HWI_5 were 67.4 ± 24.3, 57.9 ± 20.1, 42.8 ± 16.9, 39.7 ± 12.2, 36.5 ± 22.2 and 37.8 ± 15.4 ng/m3, respectively. Though these concentrations were lower than the estimated minimal risk level (MRL) for chronic inhalation exposure to naphthalene and its derivatives 0.003 mg/m3, continuous exposure to these pollutants might result in chronic effects. Finally, this study may be used to evaluate the environmental contribution of alkyl-naphthalenes from typical medical waste incinerator in Nigeria.
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Affiliation(s)
- Olusola Adedayo Adesina
- Department of Chemical & Petroleum Engineering, Afe Babalola University, Ado-Ekiti, Nigeria.
- Department of Chemical Engineering, Obafemi Awolowo University, Ile-Ife, Nigeria.
| | | | - Paul N Diagboya
- Department of Chemistry, Vaal University of Technology, Vanderbijlpark, Guateng, South Africa.
| | - Adesuji Adejuwon
- Department of Environmental Health, Obafemi Awolowo University, Ile-Ife, Nigeria
| | - Temitope Famubode
- Department of Environmental Health, Obafemi Awolowo University, Ile-Ife, Nigeria
| | - Josiah O Bello
- Department of Chemical Engineering, Landmark University, Omu-Aran, Nigeria
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Kinetic Modelling of the Removal of Multiple Heavy Metallic Ions from Mine Waste by Natural Zeolite Sorption. WATER 2017. [DOI: 10.3390/w9070482] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This study investigates the sorption of heavy metallic ions (HMIs), specifically lead (Pb2+), copper (Cu2+), iron (Fe3+), nickel (Ni2+) and zinc (Zn2+), by natural zeolite (clinoptilolite). These HMIs are combined in single-, dual-, triple-, and multi-component systems. The batch mode experiments consist of a total initial concentration of 10 meq/L normality for all systems, acidified to a pH of 2 by concentrated nitric (HNO3) acid. A zeolite dosage of 4 g per 100 mL of synthetic nitrate salt aqueous solution is applied, for a contact period of 5 to 180 min. Existing kinetic models on HMIs sorption are limited for multi-component system combinations. Therefore, this study conducts kinetic analysis by both reaction and diffusion models, to quantify the sorption process. The study concludes that the process correlates best with the pseudo-second-order (PSO) kinetic model. In the multi-component system combining all five HMIs, the initial sorption rate and theoretical equilibrium capacity are determined as 0.0033 meq/g·min and 0.1159 meq/g, respectively. This provides significant insight into the mechanisms associated with the sorption process, as well as contributing to the assessment of natural zeolite as a sorbent material in its application in industrial wastewater treatment.
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Tran TH, Okabe H, Hidaka Y, Hara K. Removal of metal ions from aqueous solutions using carboxymethyl cellulose/sodium styrene sulfonate gels prepared by radiation grafting. Carbohydr Polym 2017; 157:335-343. [DOI: 10.1016/j.carbpol.2016.09.049] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Revised: 09/11/2016] [Accepted: 09/15/2016] [Indexed: 10/21/2022]
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Leus K, Perez JPH, Folens K, Meledina M, Van Tendeloo G, Du Laing G, Van Der Voort P. UiO-66-(SH)2 as stable, selective and regenerable adsorbent for the removal of mercury from water under environmentally-relevant conditions. Faraday Discuss 2017; 201:145-161. [DOI: 10.1039/c7fd00012j] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The dithiol functionalized UiO-66-(SH)2 is developed as an efficient adsorbent for the removal of mercury in aqueous media. Important parameters for the application of MOFs in real-life circumstances include: stability and recyclability of the adsorbents, selectivity for the targeted Hg species in the presence of much higher concentrations of interfering species, and ability to purify wastewater below international environmental limits within a short time. We show that UiO-66-(SH)2 meets all these criteria.
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Affiliation(s)
- Karen Leus
- Center for Ordered Materials, Organometallics and Catalysis (COMOC)
- Department of Inorganic and Physical Chemistry
- Ghent University
- B-9000 Ghent
- Belgium
| | - Jeffrey Paulo H. Perez
- Center for Ordered Materials, Organometallics and Catalysis (COMOC)
- Department of Inorganic and Physical Chemistry
- Ghent University
- B-9000 Ghent
- Belgium
| | - Karel Folens
- Laboratory of Analytical Chemistry and Applied Ecochemistry (ECOCHEM)
- Department of Applied Analytical and Physical Chemistry
- Ghent University
- B-9000 Ghent
- Belgium
| | - Maria Meledina
- Electron Microscopy for Materials Science (EMAT)
- Department of Physics
- University of Antwerp
- 2020 Antwerp
- Belgium
| | - Gustaaf Van Tendeloo
- Electron Microscopy for Materials Science (EMAT)
- Department of Physics
- University of Antwerp
- 2020 Antwerp
- Belgium
| | - Gijs Du Laing
- Laboratory of Analytical Chemistry and Applied Ecochemistry (ECOCHEM)
- Department of Applied Analytical and Physical Chemistry
- Ghent University
- B-9000 Ghent
- Belgium
| | - Pascal Van Der Voort
- Center for Ordered Materials, Organometallics and Catalysis (COMOC)
- Department of Inorganic and Physical Chemistry
- Ghent University
- B-9000 Ghent
- Belgium
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Essawy HA, Mohamed MF, Ammar NS, Ibrahim HS. Potassium fulvate-functionalized graft copolymer of polyacrylic acid from cellulose as a promising selective chelating sorbent. RSC Adv 2017. [DOI: 10.1039/c7ra02646c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
(Cell-g-PAA)/KF is a promising selective chelating graft copolymer for heavy metal ions from aqueous solutions.
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Affiliation(s)
- Hisham A. Essawy
- Department of Polymers and Pigments
- National Research Centre
- Cairo
- Egypt
| | - Magdy F. Mohamed
- Department of Chemistry
- Faculty of Science
- Al-Azhar University
- Cairo
- Egypt
| | - Nabila S. Ammar
- Department of Water Pollution
- National Research Centre
- Cairo
- Egypt
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Remediation of Rhodamine B Dye from Aqueous Solution Using Casuarina equisetifolia Cone Powder as a Low-Cost Adsorbent. ACTA ACUST UNITED AC 2016. [DOI: 10.1155/2016/9497378] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The removal of toxic dye rhodamine B (RB) from aqueous solution was achieved by using Casuarina equisetifolia cone (CEC) as an adsorbent. Batch experiment method was used in order to investigate the effects of contact time, pH, temperature, ionic strength, and dye concentration on the adsorption process. Kinetics and isotherm theoretical models were applied on the experimental data and it was found that the pseudo-2nd-order kinetics and the Langmuir isotherm model best fitted into the data. The Langmuir maximum adsorption capacity for CEC was determined as 49.5 mg g−1. The adsorption of RB onto CEC is thermodynamically favourable, feasible, and endothermic in nature.
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Kinetic and Equilibrium Studies of Sorption of Ammonium in the Soil-Water Environment in Agricultural Areas of Central Poland. APPLIED SCIENCES-BASEL 2016. [DOI: 10.3390/app6100269] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Diagboya PN, Olu-Owolabi BI, Adebowale KO. Distribution and interactions of pentachlorophenol in soils: The roles of soil iron oxides and organic matter. JOURNAL OF CONTAMINANT HYDROLOGY 2016; 191:99-106. [PMID: 27344260 DOI: 10.1016/j.jconhyd.2016.04.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2015] [Revised: 04/15/2016] [Accepted: 04/17/2016] [Indexed: 06/06/2023]
Abstract
Soil iron oxides (IOs) and organic matter (OM) play varying roles in pentachlorophenol (PCP) retention and mobility, but the extent and mechanism are still unknown. Therefore, in order to have a better understanding of the adsorption of PCP on soils, batch sorption studies were carried out on whole soils and soils selectively treated to remove IOs (IOR) and OM (OMR). The effects of pH, time, and temperature were investigated. Results showed that PCP sorption was temperature and pH dependent; sorption decreased as both temperature and pH increased. Sorption was partly surface adsorption and partly partitioning within voids of IOs components as revealed by the kinetics models. The surface adsorption was multi-layer in nature. Equilibria were faster in the IOR soils than the untreated and OMR soils. IOs played greater roles in PCP sorption than OM. Removal of soil components, especially the IOs, as experienced in soils plagued by soil erosion, may lead to increased risks of PCP pollution of environmental media especially the aquifer.
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Affiliation(s)
- Paul N Diagboya
- Department of Physical Sciences, Landmark University, Kwara State, Nigeria.
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50
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Wu H, Li P, Pan D, Yin Z, Fan Q, Wu W. Interactions between Silicon Oxide Nanoparticles (SONPs) and U(VI) Contaminations: Effects of pH, Temperature and Natural Organic Matters. PLoS One 2016; 11:e0149632. [PMID: 26930197 PMCID: PMC4773229 DOI: 10.1371/journal.pone.0149632] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2015] [Accepted: 02/02/2016] [Indexed: 11/23/2022] Open
Abstract
The interactions between contaminations of U(VI) and silicon oxide nanoparticles (SONPs), both of which have been widely used in modern industry and induced serious environmental challenge due to their high mobility, bioavailability, and toxicity, were studied under different environmental conditions such as pH, temperature, and natural organic matters (NOMs) by using both batch and spectroscopic approaches. The results showed that the accumulation process, i.e., sorption, of U(VI) on SONPs was strongly dependent on pH and ionic strength, demonstrating that possible outer- and/or inner-sphere complexes were controlling the sorption process of U(VI) on SONPs in the observed pH range. Humic acid (HA), one dominated component of NOMs, bounded SONPs can enhance U(VI) sorption below pH~4.5, whereas restrain at high pH range. The reversible sorption of U(VI) on SONPs possibly indicated that the outer-sphere complexes were prevalent at pH 5. However, an irreversible interaction of U(VI) was observed in the presence of HA (Fig 1). It was mainly due to the ternary SONPs-HA-U(VI) complexes (Type A Complexes). After SONPs adsorbed U(VI), the particle size in suspension was apparently increased from ~240 nm to ~350 nm. These results showed that toxicity of both SONPs and U(VI) will decrease to some extent after the interaction in the environment. These findings are key for providing useful information on the possible mutual interactions among different contaminants in the environment.
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Affiliation(s)
- Hanyu Wu
- Radiochemistry Laboratory, School of Nuclear Science and Technology, Lanzhou University, Lanzhou, Gansu, 730000, China
- Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou, Gansu, 730000, China
| | - Ping Li
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, Sichuan, 621000, China
| | - Duoqiang Pan
- Radiochemistry Laboratory, School of Nuclear Science and Technology, Lanzhou University, Lanzhou, Gansu, 730000, China
- Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou, Gansu, 730000, China
| | - Zhuoxin Yin
- Radiochemistry Laboratory, School of Nuclear Science and Technology, Lanzhou University, Lanzhou, Gansu, 730000, China
- Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou, Gansu, 730000, China
| | - Qiaohui Fan
- Key Laboratory of Petroleum Resources, Gansu Province / CAS Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou, Gansu, 730000, China
- * E-mail: (QF); (WW)
| | - Wangsuo Wu
- Radiochemistry Laboratory, School of Nuclear Science and Technology, Lanzhou University, Lanzhou, Gansu, 730000, China
- Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou, Gansu, 730000, China
- * E-mail: (QF); (WW)
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