Effect of Functionalized Carbon Nanofibers with Carboxylic Function Group on the Removal of Zinc from water

Atieh, Muataz Ali

doi:10.7763/ijesd.2011.v2.112

Cited by 17 publications

(7 citation statements)

References 16 publications

(13 reference statements)

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“…In other words, the lesssaturating active sites on the absorbent lead to an increase in the speed of collision between metal ions and adsorption sites. Results of another study conducted by Dargahi et al, Gupta et al, and Atieh et al on Pb and Cr removal from aqueous solution using the nanoparticles absorbent confrm our results [4,42,43].…”

Section: Efects Of Contact Time Results Obtained Insupporting

confidence: 90%

Evaluation of Pb (II) Removal by Tea Pulp Modified with Magnetite Nanoparticle

Mozaffari

Khodabakhshi

Azizi³

2023

Journal of Chemistry

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Tea waste was used to successfully synthesize magnetic nanoparticles (TWMNPs). In this investigation, Pb (II) was eliminated by tea waste modified with magnetite nanoparticles (TWMNPs) was investigated. To prepare the TWMNPs, FeCl3.6H2O was dissolved in double distilled water (DDW) and 20 g of pulp tea was added slowly and stirred, after 30 min TWMNPs adsorbent were separated through an external magnetic field and washed three times with double distilled water (DDW) and ethanol then dried at 60°C. The FESEM test of TWMNPs shows the particle size in the range of 15–20 nm and spherical/cuboid-shaped crystal structure of Fe3O4 (magnetite). X-ray analysis showed that the main XRD diffraction peaks of TWMNPs are related to Fe3O4, HighScore plus X’Pert software was used to identify the phase in this sample. The specific surface area of the prepared magnetite nanoparticles was 25.2 m2.g−1. The pore volume, maximum pore radius, and VSM of TWMNPs were 14.4 cm3.g−1, 2.3 nm, and 3.37–2.41, respectively. The effects of various parameters, such as contact time, pH, concentration, and adsorbent dosage, were studied. The experimental isotherm data were analyzed using the Langmuir and Freundlich models, and it was found that the removal process followed the Langmuir isotherm and the maximum adsorption capacity calculated by Langmuir fitting was 10.67 mg.g−1. In addition, the adsorption kinetics followed the first-order kinetic model and the value of rate constant was found to be 14.04 × 10−2 min−1. The results showed that increasing the pH level led to a rise in the response level and Pb (II) removal. Also, the trend in Pb (II) removal and response level had an increase with increasing the initial concentration of Pb (II). Increasing contact time from 5 to 20 minutes has a slight effect on Pb (II) removal. Considering the results, TWMNPs could lead to suitable results for the removal of Pb (II) from wastewater containing this metal. And the maximum adsorption capacity was found to be 10.67 mg.g−1.

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Section: Efects Of Contact Time Results Obtained Insupporting

confidence: 90%

Evaluation of Pb (II) Removal by Tea Pulp Modified with Magnetite Nanoparticle

Mozaffari

Khodabakhshi

Azizi³

2023

Journal of Chemistry

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“…XRD was analyzed by X'Pert High Score software. Using the Sigma Plot software and the Scherer equation (3), the mean particle size of the nano-sized composite was 29 nm with the peaks in the XRD diagram and fitting peaks (16)(17)(18)(19)(20). 0.9 d cos λ β θ = In the above equation, d = the particle size (nm) λ = the wavelength of the X-rays (nm) β = the peak width at half of its height (radian) 2θ = the angle of diffraction (degree)…”

Section: Resultsmentioning

confidence: 99%

“…This ratio was obtained from Equations (1) and (2). At least, the mean square deviations (MSDs) are calculated by the mini-Tab software and the software yields the S/N output (16). In the optimal conditions, the experiments were repeated three times and the effect of the anions (nitrate and chloride) on the absorption of Hg was investigated accordingly.…”

Section: Methodsmentioning

confidence: 99%

Removal of mercury (II) from aqueous solutions by multiwalled carbon nanotubes coated with manganese oxide

Khodabakhshi

Asgarian

2019

J Shahrekord Univ Med Sci

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Background and aims: Water pollution by heavy metals is one of the most important environmental problems. Among the heavy metals, mercury (Hg) is a very toxic metal and its high concentration can lead to impaired pulmonary and renal dysfunction. The aim of this study was to determine the amount of Hg removal by carbon nanotubes coated with manganese (Mn) oxide from aqueous solutions. Methods: In this study, multi-walled carbon nanotubes coated with Mn oxide were prepared and used to remove Hg from aqueous environments. In addition, the physical and structural characteristics of the nanotubes were determined by the X-ray diffraction (XRD). The impact of diverse variables was further investigated, including the initial concentration of Hg, the initial pH of the solution, contact time, mixing rate, as well as the amount of nano-composite and the impacts of confounders (nitrate and chloride). Finally, optimum conditions for each of these parameters were obtained by the Taguchi statistical method. Results: The XRD analysis showed that the nanotubes were properly coated with Mn oxide. Furthermore, the results demonstrated that under pH 7, the rate of mixing of 150 rpm, the contact time of 60 minutes, the amount of nano-composite of 60 mg, and the initial density of Hg 80 mg/L can be achieved by removing 95% Hg. Moreover, the confounder factors of nitrate and chloride reduced the amount of Hg removal by 4 and 5%, respectively. Conclusion: Based on the results, the nanotubes coated with Mn oxide can be used as easy and strong absorbents for the rapid absorption of Hg from drinking water and industrial wastewater.

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“…Porous characteristics of biochar causes biochar can be applied for adsorption of various adsorbates, including various heavy metal cations [3,4,5,6], anions [3,6,7,8], and organic adsorbates [9,10,11]. Chemical properties of biochar can be improved to increase performance of biochar as adsorbent, i.e by combining it using various metal oxides to form a composite [12,13,14] or by functionalizing it using various oxidators to improve acid functional groups on its surface [15,16,17,18].…”

Section: Introductionmentioning

confidence: 99%

STUDY OF SALT OXIDATOR TYPE INFLUENCE ON PHYSICHOCHEMISTRY OF PATCHOULI BIOCHAR – Cr₂O₃ COMPOSITE AND ORGANIC CONTAMINANT ADSORPTION

Setianingsih¹,

Añón²,

Ismuyanto³

2021

International Journal of Civil Engineering and Technology (Ijciet)

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Organic wastewater, including drug wastewater, creates serious problems in life due to its risks, such as drug retention and toxicity for both human or animals. Biochar is a porous material which can be used as adsorbent for wastewater remediation. Formation of composite by impregnating the biochar with metal oxides can improve performance of biochar in adsorption. Oxidation of biochar surface before the impregnation was studied in this research. Purpose of this research is to study itseffect on its characteristics and adsorption of paracetamol, as the contaminant model. Synthesis was conducted in some steps, including preparation of the activated biochar from patchouli biomass through pyrolysis at 450 o C using ZnCl2 activator, functionalization of biochar using 3 different salts (KMnO4, K2S2O8, K2Cr2O7) at 60 o C, impregnation of the activated biochar using CrCl3 0.9 M, and calcination of the biochar-CrCl3 composite to form biochar-Cr2O3 composite at 600 o C. Adsorption test used paracetamol (100 ppm) as pollutan model with batch method (175 rpm, 24 h). Xray diffraction characterization indicated impregnant structure of Cr2O3. Characterization using FTIR spectrophotometry showed different patterns, especially connected to C=O and OH bands by using oxidators in sequence of K2S2O8 > KMnO4 > K2Cr2O7. SEM-EDX characterization showed different content of Cr(III) in the composites prepared in oxidator sequence of K2Cr2O7 > K2S2O8 > KMnO4. SEM images of the composites indicated the irregular ball shapes. Adsorption values were obtained more in same sequence of oxidator type based on FTIR spectrophotometry characterization than SEM-EDX.

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Effect of Functionalized Carbon Nanofibers with Carboxylic Function Group on the Removal of Zinc from water

Cited by 17 publications

References 16 publications

Evaluation of Pb (II) Removal by Tea Pulp Modified with Magnetite Nanoparticle

Evaluation of Pb (II) Removal by Tea Pulp Modified with Magnetite Nanoparticle

Removal of mercury (II) from aqueous solutions by multiwalled carbon nanotubes coated with manganese oxide

STUDY OF SALT OXIDATOR TYPE INFLUENCE ON PHYSICHOCHEMISTRY OF PATCHOULI BIOCHAR – Cr₂O₃ COMPOSITE AND ORGANIC CONTAMINANT ADSORPTION

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Effect of Functionalized Carbon Nanofibers with Carboxylic Function Group on the Removal of Zinc from water

Cited by 17 publications

References 16 publications

Evaluation of Pb (II) Removal by Tea Pulp Modified with Magnetite Nanoparticle

Evaluation of Pb (II) Removal by Tea Pulp Modified with Magnetite Nanoparticle

Removal of mercury (II) from aqueous solutions by multiwalled carbon nanotubes coated with manganese oxide

STUDY OF SALT OXIDATOR TYPE INFLUENCE ON PHYSICHOCHEMISTRY OF PATCHOULI BIOCHAR – Cr2O3 COMPOSITE AND ORGANIC CONTAMINANT ADSORPTION

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STUDY OF SALT OXIDATOR TYPE INFLUENCE ON PHYSICHOCHEMISTRY OF PATCHOULI BIOCHAR – Cr₂O₃ COMPOSITE AND ORGANIC CONTAMINANT ADSORPTION