Cobalt-Iron Alloy Nanoparticles Impregnated Partially Graphitized Carbon Adsorbent from Metallized Bagasse for Organic Pollutants Removal

<div><p>Here, we report a highly efficient adsorbent obtained from the carbonization of metallized bagasse. The material is characterized using FESEM, HRTEM, PXRD, zeta-potential and VSM techniques. The material shows an impressive adsorbent property for anionic dyes, pharmaceutical (paracetamol) along with commercially used ‘hair dye’. Further, pH triggered adsorption of Methylene orange (MO), Congo red (CR), Amido black (AB), and paracetamol were studied and results show an impressive adsorption capacity of 1102.9, 1253.9, 877.2, 227.8 mg/g respectively. It is seen that under experimental conditions, adsorbent shows ultrafast adsorption kinetics where ~96% AB dye gets adsorbed in just 5 min, 93% of CR adsorption in 5 min and ~89% of MO adsorption in 5 min. Also, we could observe fast adsorption rate for commercially used ‘hair dye’ and paracetamol drug. Interestingly, in just 5 min, 95% of hair dye adsorption is seen and ~84% drug removal with maximum adsorption capacity of , recyclability of the adsorbent demonstrates the practical benefits of the material for waste water remediation.</p></div>

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Cobalt-Iron Alloy Nanoparticles Impregnated Partially Graphitized Carbon Adsorbent from Metallized Bagasse for Organic Pollutants Removal

10.26434/chemrxiv.13168574 ◽

2020 ◽

Author(s):

Sai Rashmi M. ◽

Akhila S. ◽

Velvita Duas ◽

Ashish Singh ◽

Akshaya Samal ◽

...

Keyword(s):

Adsorption Capacity ◽

Dye Adsorption ◽

Iron Alloy ◽

Carbon Adsorbent ◽

Water Remediation ◽

Maximum Adsorption Capacity ◽

Anionic Dyes ◽

Experimental Conditions ◽

Hair Dye ◽

Methylene Orange

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Enhanced adsorption removal of anionic dyes via a facile preparation of amino-functionalized magnetic silica

Water Science & Technology ◽

10.2166/wst.2017.009 ◽

2017 ◽

Vol 75 (6) ◽

pp. 1399-1409 ◽

Cited By ~ 2

Author(s):

Xiao-Shui Li ◽

Yu-Han Fan ◽

Shou-Wen Zhang ◽

Shi-Hua Qi

Keyword(s):

Aqueous Solutions ◽

Adsorption Capacity ◽

Maximum Adsorption Capacity ◽

Reactive Black 5 ◽

Order Kinetic ◽

Step Method ◽

Anionic Dyes ◽

Solution Ph ◽

Experimental Conditions ◽

Magnetic Silica

A novel amino-functionalized magnetic silica (Fe3O4@SiO2-NH2) was easily prepared via a one-step method integrating the immobilization of 3-aminopropyltriethoxysilane with a sol-gel process of tetraethyl orthosilicate into a single process. This showed significant improvement in the adsorption capacity of anionic dyes. The product (Fe3O4@SiO2-NH2) was characterized with scanning electron microscopy, Fourier transform infrared spectroscopy, energy dispersive X-ray spectrometry, zeta potential and vibrating sample magnetometry. The adsorption performance of Fe3O4@SiO2-NH2 was then tested by removing acid orange 10 (AO10) and reactive black 5 (RB5) from the aqueous solutions under various experimental conditions including initial solution pH, initial dye concentrations, reaction time and temperature. The results indicated that the maximum adsorption capacity of AO10 and RB5 on Fe3O4@SiO2-NH2 was 621.9 and 919.1 mg g−1 at pH 2, respectively. The sorption isotherms fit the Langmuir model nicely. Similarly, the sorption kinetic data were better fitted into the pseudo-second order kinetic model than the pseudo-first order model. In addition, the thermodynamic data demonstrated that the adsorption process was endothermic, spontaneous and physical. Furthermore, Fe3O4@SiO2-NH2 could be easily separated from aqueous solutions by an external magnetic field, and the preparation was reproducible.

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Adsorción del naranja de metilo en solución acuosa sobre hidróxidos dobles laminares

Acta Universitaria ◽

10.15174/au.2015.778 ◽

2015 ◽

Vol 25 (3) ◽

pp. 25-34 ◽

Cited By ~ 2

Author(s):

Laura Alicia Ramírez Llamas ◽

Araceli Jacobo Azuara ◽

J. Merced Martínez Rosales

Keyword(s):

Methyl Orange ◽

Adsorption Capacity ◽

Dye Adsorption ◽

Temperature Programmed Desorption ◽

Maximum Adsorption Capacity ◽

X Ray Diffraction ◽

X Ray ◽

Suitable Temperature ◽

Temperature Programmed ◽

Double Hydroxides

In this paper, layered double hydroxides (LDH) were synthesized and characterized using techniques of Physisorption of Nitrogen, Infrared, Temperature Programmed Desorption, X-Ray Diffraction, TGA and Immersion Microcalorimetry, in order to determine the basic properties of the adsorbent. The methyl orange (MO) is used as a dye and as a result, it is frequently found in effluents from textile industries. The dye adsorption isotherms on LDH were studied as function of pH and temperature. The maximum adsorption capacity of methyl orange on LDH was carried out at pH 5, and the minimum adsorption capacity at pH 11, being 40.2 mg/g and 22.1 mg/g, respectively. Furthermore, the suitable temperature to promote the adsorption of methyl orange on LDH was at 25 °C, as at 35 °C shows a significant decrease.

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Biochar from Agricultural by-Products for the Removal of Lead and Cadmium from Drinking Water

Water ◽

10.3390/w12102933 ◽

2020 ◽

Vol 12 (10) ◽

pp. 2933

Author(s):

Edgar Pineda Puglla ◽

Diana Guaya ◽

Cristhian Tituana ◽

Francisco Osorio ◽

María J. García-Ruiz

Keyword(s):

Drinking Water ◽

Adsorption Capacity ◽

Freundlich Isotherm ◽

Maximum Adsorption Capacity ◽

Peanut Shell ◽

Experimental Conditions ◽

Lower Efficiency ◽

Lead And Cadmium ◽

Removal Capacity ◽

Removal Of Heavy Metals

This study reports the adsorption capacity of lead Pb2+ and cadmium Cd2+ of biochar obtained from: peanut shell (BCM), “chonta” pulp (BCH) and corn cob (BZM) calcined at 500, 600 and 700 °C, respectively. The optimal adsorbent dose, pH, maximum adsorption capacity and adsorption kinetics were evaluated. The biochar with the highest Pb2+ and Cd2+ removal capacity is obtained from the peanut shell (BCM) calcined at 565 °C in 45 min. The optimal experimental conditions were: 14 g L−1 (dose of sorbent) and pH between 5 and 7. The sorption experimental data were best fitted to the Freundlich isotherm model. High removal rates were obtained: 95.96% for Pb2+ and 99.05. for Cd2+. The BCH and BZM revealed lower efficiency of Pb2+ and Cd2+ removal than BCM biochar. The results suggest that biochar may be useful for the removal of heavy metals (Pb2+ and Cd2+) from drinking water.

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Insights into the mechanism of methylene blue removed by novel and classic biochars

Water Science & Technology ◽

10.2166/wst.2019.158 ◽

2019 ◽

Vol 79 (8) ◽

pp. 1561-1570

Author(s):

Wei Chen ◽

Fengting Chen ◽

Bin Ji ◽

Lin Zhu ◽

Hongjiao Song

Keyword(s):

Methylene Blue ◽

Adsorption Capacity ◽

Ph Value ◽

Low Cost ◽

Underlying Mechanism ◽

Maximum Adsorption Capacity ◽

Experimental Conditions ◽

Average Pore ◽

Adsorption Effect ◽

Magnolia Grandiflora

Abstract The adsorption behavior and the underlying mechanism of methylene blue (MB) sorption on biochars prepared from different feedstocks at 500 °C were evaluated. The biochar feedstocks included Magnolia grandiflora Linn. leaves biochar (MBC), pomelo (Citrus grandis) peel biochar (PBC) and badam shell biochar (BBC). The results of characterizing and analyzing the samples showed that different biochars had different effects on the adsorption of MB. It could be found that MBC had the best adsorption effect on MB due to its largest average pore diameter of 5.55 nm determined by Brunauer-Emmett-Teller analysis. Under the optimal conditions, the maximum adsorption capacities of BBC, PBC and MBC were 29.7, 85.15 and 99.3 mg/g, respectively. The results showed that the amount of adsorption was affected by the pH value. The maximum adsorption capacity of MBC was 46.99 mg/g when it was at pH of 3, whereas for the same experimental conditions the maximum adsorption capacity of BBC and PBC was 25.29 mg/g at pH of 11 and 36.08 mg/g at pH of 7, respectively. Therefore, MBC was found to be a most efficient low-cost adsorbentl for dye wastewater treatment compared with BBC and PBC, and it had the best removal effect under acidic conditions.

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Understanding the physicochemical properties of Zn–Fe LDH nanostructure as sorbent material for removing of anionic and cationic dyes mixture

Scientific Reports ◽

10.1038/s41598-021-00437-w ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Rehab K. Mahmoud ◽

Mohamed Taha ◽

Amal Zaher ◽

Rafat M. Amin

Keyword(s):

Adsorption Capacity ◽

Photoelectron Spectroscopy ◽

Adsorption Process ◽

Dye Adsorption ◽

Chemical Properties ◽

Cationic Dyes ◽

Anionic Dyes ◽

Visible Radiation ◽

X Ray ◽

Before And After

AbstractIn our work, the removal of cationic and anionic dyes from water was estimated both experimentally and computationally. We check the selectivity of the adsorbent, Zn–Fe layered double hydroxide (LDH) toward three dyes. The physical and chemical properties of the synthesis adsorbent before and after the adsorption process were investigated using X-ray photoelectron spectroscopy, energy dispersive X-ray, X-ray diffraction, FT-IR, HRTEM, and FESEM analysis, particle size, zeta potential, optical and electric properties were estimated. The effect of pH on the adsorption process was estimated. The chemical stability was investigated at pH 4. Monte Carlo simulations were achieved to understand the mechanism of the adsorption process and calculate the adsorption energies. Single dye adsorption tests revealed that Zn–Fe LDH effectively takes up anionic methyl orange (MO) more than the cationic dyes methylene blue (MB) and malachite green (MG). From MO/MB/MG mixture experiments, LDH selectively adsorbed in the following order: MO > MB > MG. The adsorption capacity of a single dye solution was 230.68, 133.29, and 57.34 mg/g for MO, MB, and MG, respectively; for the ternary solution, the adsorption capacity was 217.97, 93.122, and 49.57 mg/g for MO, MB, and MG, respectively. Zn–Fe LDH was also used as a photocatalyst, giving 92.2% and 84.7% degradation at concentrations of 10 and 20 mg/L, respectively. For visible radiation, the Zn–Fe LDH showed no activity.

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A Novel Geopolymer Foam Based On ZSM-5 Zeolite Fabricated Using Templating Emulsion/Chemical Foaming Method and Its Application in Batch and Continuous Dye Removal Systems

10.21203/rs.3.rs-1227901/v1 ◽

2022 ◽

Author(s):

Mahboobeh Monjezi ◽

Vahid Javanbakht

Keyword(s):

Adsorption Capacity ◽

Dye Removal ◽

Adsorption Process ◽

Dye Adsorption ◽

Batch Adsorption ◽

Maximum Adsorption Capacity ◽

Continuous Systems ◽

Green Materials ◽

Pseudo Second Order ◽

Chemical Foaming

Abstract Geopolymers as sustainable and environmentally friendly “green materials”, can be synthesized by utilizing waste material and by-products. A porous geopolymer foam adsorbent based on ZSM-5 zeolite was prepared using templating emulsion/chemical foaming method in different conditions and used for dye removal in batch and continuous systems. The parameters affecting the dye adsorption including temperature, concentration, and pH, kinetics, isotherm, and thermodynamics of the process were investigated. The results of the geopolymer foam synthesis showed that thermal pretreatment of the zeolite has a positive effect on the strength and adsorption capacity. Moreover, the increase in sodium silicate more than the stoichiometric reduces the strength and adsorption capacity. The findings obtained from the batch adsorption process showed that the adsorption kinetics of the pseudo-second-order model and the adsorption isotherm of the Temkin model is adjusted with the experimental data. Thermodynamic results indicated that the process of dye adsorption with geopolymer foam is exothermic. The results from continuous experiments indicated more compatibility of the adsorption process with the models of Thomas and Bohart-Adams. The maximum adsorption capacity of methylene blue in batch and continuous processes was 9.82 and 8.17 mg/g. The adsorbent reduction was performed successfully by chemical and thermal processes.

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Highly Effective Covalently Crosslinked Composite Alginate Cryogels for Cationic Dye Removal

Gels ◽

10.3390/gels7040178 ◽

2021 ◽

Vol 7 (4) ◽

pp. 178

Author(s):

Serap Sezen ◽

Vijay Kumar Thakur ◽

Mehmet Murat Ozmen

Keyword(s):

Adsorption Capacity ◽

Dye Removal ◽

Low Cost ◽

Dye Adsorption ◽

Maximum Adsorption Capacity ◽

High Porosity ◽

Order Model ◽

Removal Capacity ◽

Pseudo Second Order ◽

The One

Currently, macroporous hydrogels have been receiving attention in wastewater treatment due to their unique structures. As a natural polymer, alginate is used to remove cationic dyes due to its sustainable features such as abundance, low cost, processability, and being environmentally friendly. Herein, alginate/montmorillonite composite macroporous hydrogels (cryogels) with high porosity, mechanical elasticity, and high adsorption yield for methylene blue (MB) were generated by the one-step cryogelation technique. These cryogels were synthesized by adding montmorillonite into gel precursor, followed by chemical cross-linking employing carbodiimide chemistry in a frozen state. The as-prepared adsorbents were analyzed by FT-IR, SEM, gel fraction, swelling, uniaxial compression, and MB adsorption tests. The results indicated that alginate/montmorillonite cryogels exhibited high gelation yield (up to 80%), colossal water uptake capacity, elasticity, and effective dye adsorption capacity (93.7%). Maximum adsorption capacity against MB was 559.94 mg g−1 by linear regression of Langmuir model onto experimental data. The Pseudo-Second-Order model was fitted better onto kinetic data compared to the Pseudo-First-Order model. Improved porosity and mechanical elasticity yielding enhanced dye removal capacity make them highly potential alternative adsorbents compared to available alginate/montmorillonite materials for MB removal.

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Continuous Flow Removal of Anionic Dyes in Water by Chitosan-Functionalized Iron Oxide Nanoparticles Incorporated in a Dextran Gel Column

Nanomaterials ◽

10.3390/nano9081164 ◽

2019 ◽

Vol 9 (8) ◽

pp. 1164 ◽

Cited By ~ 3

Author(s):

Sang Yeob Lee ◽

Ha Eun Shim ◽

Jung Eun Yang ◽

Yong Jun Choi ◽

Jongho Jeon

Keyword(s):

Removal Efficiency ◽

Continuous Flow ◽

Aqueous Media ◽

Dye Adsorption ◽

Current Method ◽

Maximum Adsorption Capacity ◽

Anionic Dyes ◽

Solution Ph ◽

Adsorbent Surface ◽

Equilibrium Data

This paper describes a novel chromatographic method for efficient removal of anionic dyes from aqueous solutions. Chitosan-coated Fe3O4 nanoparticles can easily be immobilized on a dextran gel column. Single elution of Evans Blue (EB) solution to the nanoadsorbent-incorporated columns provides high removal efficiency with a maximum adsorption capacity of 243.9 mg/g. We also investigated the influence of initial concentration and solution pH on the removal efficiency of EB. The electrostatic interaction between the adsorbent surface and negatively charged sulfate groups on EB molecules promotes the efficient adsorption of dyes. The equilibrium data matched well with the Langmuir isotherm model, which indicated monolayer dye adsorption onto the adsorbent surface. To extend the application of the current method, we performed further adsorption experiments using other anionic dyes of different colors (Cy5.5, Acid Yellow 25, Acid Green 25, and Acid Red 1). All of these molecules can efficiently be captured under continuous flow conditions, with higher removal efficiency obtained with more negatively charged dyes. These findings clearly demonstrate that the present approach is a useful method for the removal of anionic dye contaminants in aqueous media by adsorption.

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Parametric and adsorption kinetic studies of methylene blue removal from simulated textile water using durian (Durio zibethinus murray) skin

Water Science & Technology ◽

10.2166/wst.2015.247 ◽

2015 ◽

Vol 72 (6) ◽

pp. 896-907 ◽

Cited By ~ 18

Author(s):

S. M. Anisuzzaman ◽

Collin G. Joseph ◽

D. Krishnaiah ◽

A. Bono ◽

L. C. Ooi

Keyword(s):

Methylene Blue ◽

Adsorption Capacity ◽

Dye Adsorption ◽

Freundlich Isotherm ◽

Kinetic Studies ◽

Isotherm Models ◽

Batch Adsorption ◽

Maximum Adsorption Capacity ◽

Order Kinetic ◽

Durio Zibethinus

In this study, durian (Durio zibethinus Murray) skin was examined for its ability to remove methylene blue (MB) dye from simulated textile wastewater. Adsorption equilibrium and kinetics of MB removal from aqueous solutions at different parametric conditions such as different initial concentrations (2–10 mg/L), biosorbent dosages (0.3–0.7 g) and pH solution (4–9) onto durian skin were studied using batch adsorption. The amount of MB adsorbed increased from 3.45 to 17.31 mg/g with the increase in initial concentration of MB dye; whereas biosorbent dosage increased from 1.08 to 2.47 mg/g. Maximum dye adsorption capacity of the durian skin was found to increase from 3.78 to 6.40 mg/g, with increasing solution pH. Equilibrium isotherm data were analyzed according to Langmuir and Freundlich isotherm models. The sorption equilibrium was best described by the Freundlich isotherm model with maximum adsorption capacity of 7.23 mg/g and this was due to the heterogeneous nature of the durian skin surface. Kinetic studies indicated that the sorption of MB dye tended to follow the pseudo second-order kinetic model with promising correlation of 0.9836 < R2 < 0.9918.

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