Multivariate optimization of removing of cobalt(II) with an efficient aminated-GMA polypropylene adsorbent by induced-grafted polymerization under simultaneous gamma-ray irradiation

AbstractNowadays, radiation grafting polymer adsorbents have been widely developed due to their advantages, such as low operating cost, high efficiency. In this research, glycidyl methacrylate monomers were grafted on polypropylene polymer fibers by simultaneous irradiation of gamma-ray with a dose of 20 kGy. The grafted polymer was then modified using different amino groups and tested for adsorption of cobalt ions in an aqueous solution. Finally, the modified polymer adsorbent with a high efficiency for cobalt ions adsorption was synthesized and tested. Different modes of cobalt ions adsorption were tested in other adsorption conditions, including adsorption contact time, pH, different amounts of adsorbent mass, and different concentrations of cobalt ions solution. The adsorbent structure was characterized with FT-IR, XRD, TG and SEM techniques and illustrated having an efficient grafting percentage and adsorption capability for cobalt removing by batch experiments. The optimum conditions were obtained by a central composite design: adsorbent mass = 0.07 g, initial concentration = 40 mg/L, time = 182 min, and pH = 4.5 with ethylenediamine as a modified monomer and high amination percentage. Kinetics and equilibrium isotherms observation described that the experimental data followed pseudo-second-order and Langmuir models, respectively. The maximum adsorption capacity from Langmuir isotherm capacity is obtained equal to 68.02 mg/g.

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Multivariate Optimization of Removing of Cobalt(II) with an Efficient Aminated-GMA Polypropylene Adsorbent by Induced-Grafted Polymerization under Simultaneous Gamma-Ray Irradiation

10.21203/rs.3.rs-668224/v1 ◽

2021 ◽

Author(s):

Fatemeh Maleki ◽

Mobina Gholami ◽

Rezvan Torkaman ◽

Meisam Torab-Mostaedi ◽

Mehdi Asadollahzadeh

Keyword(s):

High Efficiency ◽

Gamma Ray ◽

Operating Cost ◽

Polymer Fibers ◽

Cobalt Ions ◽

Grafted Polymer ◽

Modified Polymer ◽

Simultaneous Irradiation ◽

Gamma Ray Irradiation ◽

Ft Ir

Abstract Nowadays, radiation grafting polymer adsorbents have been widely developed due to their advantages, such as low operating cost, high efficiency. In this research, glycidyl methacrylate monomers by simultaneous irradiation of gamma-ray with a dose of 20 kGy were grafted on polypropylene polymer fibers. The grafted polymer was then modified using different amino groups and tested for adsorption of cobalt ions in an aqueous solution. Finally, modified polymer adsorbent with the high efficiency for cobalt ions adsorption was synthesized and tested for further investigation. Different modes of cobalt ions adsorption were tested in other adsorption conditions, including adsorption contact time, pH, different amounts of adsorbent mass, and different concentrations of cobalt ions solution. The adsorbent structure was characterized with FT-IR, and SEM techniques and illustrated having an efficient grafting percentage and adsorption capability for cobalt removing by batch experiments. The optimum conditions were obtained by a central composite design as follows: adsorbent mass = 0.07 g, initial concentration = 40 mg/L, time = 182 min, and pH = 4.5 with ethylenediamine as a modified monomer and high amination percentage. The features such as inexpensive adsorbent, easy to prepare, high efficiency, and stability allow the radiated-induced grafted adsorbent to constitute one of promising materials for heavy metals remediation.

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Synthesis of Magnetic Multiwalled Carbon Nano Tubes and Investigation of isotherm and kinetic models for cleanup of Carbaryl pesticide

Global NEST Journal ◽

10.30955/gnj.002895 ◽

2020 ◽

Keyword(s):

Kinetic Models ◽

High Efficiency ◽

Kinetic Studies ◽

Xrd Analysis ◽

Maximum Adsorption Capacity ◽

Multiwalled Carbon ◽

Pseudo Second Order ◽

Carbon Nano Tubes ◽

Isotherm And Kinetic Models ◽

Main Factor

<p>Abstract: Water is the main factor of movement and transport of pesticides and contamination of water by these pollutants is one of the most important challenges due to their widespread use and increased concentrations. Moreover, these compounds are on the U.S.EPA Priority Pollutant list because of the potential of accumulation and the property of damaging effects. In this study, multiwalled carbon nanotube-based magnetic nanoparticles were synthesized and used as an affective adsorbent for carbaryl pesticide. The properties of the synthesized Fe3O4@MWCNTs were characterized by TEM images and XRD analysis. The obtained data were studied by isotherm and kinetic models. Carbaryl adsorbed onto the synthesized adsorbent was compatible with the Langmuir isotherm (R2 =0.993). The maximum adsorption capacity (qmax) of the pesticide onto the Fe3O4-MWCNTs was obtained at 68.2 mg/g. The kinetic studies of the reactions showed that the adsorption process followed the pseudo-second order model with R2 ≥0.99 for all initial carbaryl concentrations. The adsorbent was extracted by magnet reused several times (six rounds) with a reasonable efficiency. The Fe3O4-MWCNTs have great potential for adsorption of carbaryl from water and wastewater due to high efficiency, easy separation and reusability.</p>

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Preparation and characterization of multifunctional sponge-gourd fibers (Luffa cylindrica)/ hydroxyapatite composites for removal of lead and methylene blue

10.21203/rs.3.rs-260989/v1 ◽

2021 ◽

Author(s):

Ahmed A. Oun ◽

Kholod H. Kamal ◽

Khaled Farroh ◽

Esmat F. Ali ◽

Mohamed A. Hassan

Keyword(s):

Methylene Blue ◽

High Efficiency ◽

Average Length ◽

Maximum Adsorption Capacity ◽

Luffa Cylindrica ◽

Sponge Gourd ◽

Type Contact ◽

Pseudo Second Order ◽

Short Time

Abstract Cellulose, oxidized-fibers, and oxidized-nanocellulose were isolated from sponge-gourd fibers (Luffa cylindrica). Isolated materials showed different morphology (shape and size), chemical, crystalline properties, and removal efficiency against methylene blue (MB) and lead ions (Pb2+). The cellulosic materials showed high efficiency in removing MB more than Pb2+. So, different luffa forms/hydroxyapatite (HAp) composites were prepared and used as adsorbents for removal of both MB and Pb2+ from aqueous solutions. The effect of sorbent type, contact time, and initial MB and Pb2+ concentrations were studied. HAp was successfully synthesized on the surface of luffa with an average length of 40–56 nm and width of 14–19 nm. Kinetic and adsorption studies of MB and Pb2+ ions were well fitted with the pseudo-second-order model and Langmuir model. The maximum adsorption capacity of MB was 25.2 mg/g, 30.8 mg/g, and 36.2 mg/g for oxidized-fibers/HAp, oxidized-fibers, and cellulose, respectively, and for Pb2+ was 625 mg/g, 714 mg/g, and 714.5 mg/g for oxidized-fibers/HAp, oxidized-nanocellulose/HAp, and cellulose/HAp, respectively. Also, more than 85% of MB (25 mg/L) and 95% of lead (500 mg/L) were removed within the first 5 min. Oxidize-fibers/HAp composite showed effective adsorption with both MB and Pb2+ in a very short time.

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Equilibrium and Kinetics Study of Adsorption of Crystal Violet onto the Peel ofCucumis sativaFruit from Aqueous Solution

E-Journal of Chemistry ◽

10.1155/2012/457632 ◽

2012 ◽

Vol 9 (3) ◽

pp. 1091-1101 ◽

Cited By ~ 8

Author(s):

T. Smitha ◽

S. Thirumalisamy ◽

S. Manonmani

Keyword(s):

Crystal Violet ◽

Dye Removal ◽

High Efficiency ◽

Ph Value ◽

Dye Adsorption ◽

Second Order ◽

Maximum Adsorption Capacity ◽

Experimental Conditions ◽

Pseudo Second Order ◽

Cucumis Sativa

The use of low-cost, locally available, high efficiency and eco-friendly adsorbents has been investigated as an ideal alternative to the current expensive methods of removing dyes from wastewater. This study investigates the potential use of the peel ofCucumis sativafruit for the removal of crystal violet (CV) dye from simulated wastewater. The effects of different system variables, adsorbent dosage, initial dye concentration, pH and contact time were investigated and optimal experimental conditions were ascertained. The results showed that as the amount of the adsorbent increased, the percentage of dye removal increased accordingly. Optimum pH value for dye adsorption was determined as 7.0. The adsorption of crystal violet followed pseudo-second order rate equation and fit well Langmuir and Freundlich equations. The maximum removal of CV was obtained at pH 7 as 92.15% for adsorbent dose of 0.2 g/50 mL and 25 mg L-1initial dye concentration at room temperature. The maximum adsorption capacity obtained from Langmuir equation was 34.24 mg g-1. Furthermore, adsorption kinetics of (CV) was studied and the rate of adsorption was found to conform to pseudo-second order kinetics with a good correlation (R2> 0.9739). The peel ofCucumis sativafruit can be attractive options for dye removal from diluted industrial effluents since test reaction made on simulated dyeing wastewater show better removal percentage of (CV).

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Preparation of Magnetic Chitosan-β-Cyclodextrin Polymer and its Adsorption for Thallium (III) in Aqueous Solution

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.479-481.1733 ◽

2012 ◽

Vol 479-481 ◽

pp. 1733-1736 ◽

Cited By ~ 1

Author(s):

Zhi Wu Zhou ◽

Jing Song Wang ◽

Qing Wei Guo ◽

Zhen Cheng Xu

Keyword(s):

Metal Ion ◽

High Efficiency ◽

Maximum Adsorption Capacity ◽

Order Kinetic ◽

Metal Ion Binding ◽

Static Tests ◽

Magnetic Chitosan ◽

Cyclodextrin Polymer ◽

Order Kinetic Model ◽

Pseudo Second Order

Magnetic chitosan bonded β-cyclodextrin polymer was prepared, and its metal ion binding was studied using the batch static tests for thallium removal. The results indicated that magnetic chitosan-β-cyclodextrin polymer (MCS-CD) showed a high efficiency for the removal of thallium, the experiment data fitted well to the pseudo second-order kinetic model, the maximum adsorption capacity of 2.154mgg-1 was obtained according to the isothermal data.

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Efficient trapping of cesium ions in water by titanate nanosheets: experimental and theoretical studies

Water Practice & Technology ◽

10.2166/wpt.2021.058 ◽

2021 ◽

Author(s):

Luyao Lin ◽

Ye Li ◽

Jie Wan ◽

Cong Liu ◽

Xiaoli Wang ◽

...

Keyword(s):

Ion Exchange ◽

High Efficiency ◽

Removal Rate ◽

Freundlich Isotherm ◽

Maximum Adsorption Capacity ◽

Adsorption Model ◽

Cesium Ions ◽

Isotherm Adsorption ◽

Best Fitting ◽

Pseudo Second Order

Abstract In recent years, TNS has attracted wide attention because of its simplicity in synthesis and high efficiency in ion exchange. The adsorption of cesium ions in aqueous solution by TNS was investigated in this stud. Results show that the removal rate of Cs (I) is about 88% when pH = 5.00 ± 0.05, C0 = 10 ppm and CTNS = 0.1 g/L. The adsorption equilibrium is reached in about 20 minutes and best fits pseudo-second order model, R2 = 0.9998; Compared with the Freundlich isotherm adsorption model and Temkin model, the Langmuir model has the best fitting effect, R2 = 0.9903. The fitting results show the maximum adsorption capacity of TNS for Cs (I) is 200.00 mg/g. The main adsorption mechanism of TNS to cesium ion is ion exchange. Therefore, TNS can be used as a potential adsorbent for effectively adsorbing Cs-containing wastewater.

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Designing Phenyl Porous Organic Polymers with High-Efficiency Tetracycline Adsorption Capacity and Wide pH Adaptability

Polymers ◽

10.3390/polym14010203 ◽

2022 ◽

Vol 14 (1) ◽

pp. 203

Author(s):

Wenjie Nie ◽

Jiao Liu ◽

Xue Bai ◽

Zefeng Xing ◽

Ying Gao

Keyword(s):

Adsorption Capacity ◽

High Efficiency ◽

Organic Polymer ◽

Maximum Adsorption Capacity ◽

Organic Polymers ◽

Adsorption Model ◽

Porous Organic Polymers ◽

One Pot ◽

Wide Range ◽

Pseudo Second Order

Adsorption is an effective method to remove tetracycline (TC) from water, and developing efficient and environment-friendly adsorbents is an interesting topic. Herein, a series of novel phenyl porous organic polymers (P-POPs), synthesized by one-pot polymerization of different ratios of biphenyl and triphenylbenzene under AlCl3 catalysis in CH2Cl2, was studied as a highly efficient adsorbent to removal of TC in water. Notably, the obtained POPs possessed abundant phenyl-containing functional groups, large specific surface area (1098 m2/g) with abundant microporous structure, high pore volume (0.579 cm3/g), favoring the removal of TC molecules. The maximum adsorption capacity (fitted by the Sips model) could achieve 581 mg/g, and the adsorption equilibrium is completed quickly within 1 h while obtaining excellent removal efficiency (98%). The TC adsorption process obeyed pseudo-second-order kinetics and fitted the Sips adsorption model well. Moreover, the adsorption of POPs to TC exhibited a wide range of pH (2–10) adaptability and outstanding reusability, which could be reused at least 5 times without significant changes in structure and efficiency. These results lay a theoretical foundation for the application of porous organic polymer adsorbents in antibiotic wastewater treatment.

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Removal of sulfate from aqueous solution using Mg–Al nano-layered double hydroxides synthesized under different dual solvent systems

Nanotechnology Reviews ◽

10.1515/ntrev-2021-0012 ◽

2021 ◽

Vol 10 (1) ◽

pp. 117-125

Author(s):

Xiaobo Liu ◽

Shuang Lu ◽

Zhen Tang ◽

Zhaojia Wang ◽

Tianyong Huang

Keyword(s):

Adsorption Capacity ◽

High Efficiency ◽

Experimental Results ◽

Maximum Adsorption Capacity ◽

Surface Charges ◽

Tetrapropylammonium Hydroxide ◽

Pseudo Second Order ◽

Solvent Systems ◽

Double Hydroxide ◽

Double Hydroxides

Abstract Because of its priority to remove anions, nano-layered double hydroxide (LDH) was incorporated to improve the sulfate attack corrosion resistance of cement-based materials. Herein, the synthesis of high-efficiency LDH for removal of SO 4 2 − {\text{SO}}_{4}^{2-} is necessary. In this study, LDH with different Mg/Al ratios was synthesized under different dual solvent systems (water and ethylene glycol/ethanol/tetrapropylammonium hydroxide). Based on the adsorption experimental results, the LDH synthesized with n(Mg:Al) = 2:1 under water and ethanol solvent systems (ET2.0) exhibits the best adsorption capacity. The d (003) of LDH synthesized with n(Mg:Al) = 2:1 under different dual solvent systems are 0.7844, 0.7830, and 0.7946 nm, respectively. Three LDH belong to LDH- NO 3 − {\text{NO}}_{3}^{-} . The results indicated that their surface charges show obvious difference synthesized under different dual solvent systems, which leads to differences in adsorption performance. The adsorption experimental results show that ET2.0 followed pseudo second-order kinetics and Langmuir model. The ET2.0 removed SO 4 2 − {\text{SO}}_{4}^{2-} through anion substitution and electrostatic interaction and exhibited excellent adsorption rate with the maximum adsorption capacity of 95.639 mg/g. The effects of pore solution anion (OH−, Cl−, and CO 3 2 − {\text{CO}}_{3}^{2-} ) on the removal of SO 4 2 − {\text{SO}}_{4}^{2-} by the ET2.0 are limited.

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