Effect of Magnetic Magnetite (Fe3O4) Nanoparticle Size on Arsenic (V) Removal from Water

2021 ◽  
Vol 21 (4) ◽  
pp. 2576-2581
Author(s):  
N. T. T. Thao ◽  
D. H. Nguyen ◽  
Pham The Kien ◽  
Thanh-Tung Duong ◽  
Nguyen Thi Kim Lien ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Absorption Efficiency ◽  
Precipitation Method ◽  
Water And Wastewater Treatment ◽  
Ion Removal ◽  
Magnetite Fe3o4 ◽  
Isotherm Adsorption ◽  
Water And Wastewater ◽  
Co Precipitation ◽  
Average Size

Magnetic magnetite (Fe3O4) nanoparticles with average sizes of 5.11, 10.53, and 14.76 nm were synthesized by the chemical co-precipitation method. The surface area of Fe3O4 nanoparticles (average size of 5.11 nm) had the largest value of 167 m2/g. The adsorption capacity for removing arsenic (As(V)) from water at 3 ppm concentration was investigated by atomic absorption spectroscopy. Results showed that the As(V) adsorption capacity of Fe3O4 was dependent on particle size. The maximum absorption efficiency (Hmax) reached 99.02%, the equilibrium time was 30 min; the maximum Langmuir isotherm adsorption capacity was 14.46 mg/g with Fe3O4 nanoparticle an average size of 5 nm. The results indicate that reducing the size of Fe3O4 nanoparticles is a promised way for As(V) ion removal from water and wastewater treatment.

scholarly journals Mixed Oxide Layered Double Hydroxide Materials: Synthesis, Characterization and Efficient Application for Mn2+ Removal from Synthetic Wastewater

Materials ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4089
Author(s):  
Cristina Modrogan ◽  
Simona Cǎprǎrescu ◽  
Annette Madelene Dǎncilǎ ◽  
Oanamari Daniela Orbuleț ◽  
Eugeniu Vasile ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Layered Double Hydroxides ◽  
Synthetic Wastewater ◽  
Precipitation Method ◽  
Metallic Ions ◽  
Materials Synthesis ◽  
Experimental Conditions ◽  
Edx Analysis ◽  
Co Precipitation ◽  
Double Hydroxides

Magnesium–aluminum (Mg-Al) and magnesium–aluminum–nickel (Mg-Al-Ni) layered double hydroxides (LDHs) were synthesized by the co-precipitation method. The adsorption process of Mn2+ from synthetic wastewater was investigated. Formation of the layered double hydroxides and adsorption of Mn2+ on both Mg-Al and Mg-Ni-Al LDHs were observed by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) and Energy Dispersive Spectrometry (EDX) analysis. XRD patterns for prepared LDHs presented sharp and symmetrical peaks. SEM studies revealed that Mg-Al LDH and Mg-Al-Ni LDH exhibit a non-porous structure. EDX analysis showed that the prepared LDHs present uniformly spread elements. The adsorption equilibrium on these LDHs was investigated at different experimental conditions such as: Shaking time, initial Mn2+ concentration, and temperatures (10 and 20 °C). The parameters were controlled and optimized to remove the Mn2+ from synthetic wastewater. Adsorption isotherms of Mn2+ were fitted by Langmuir and Freundlich models. The obtained results indicated that the isotherm data fitted better into the Freundlich model than the Langmuir model. Adsorption capacity of Mn2+ gradually increased with temperature. The Langmuir constant (KL) value of Mg-Al LDH (0.9529 ± 0.007 L/mg) was higher than Mg-Al-Ni LDH (0.1819 ± 0.004 L/mg), at 20 °C. The final adsorption capacity was higher for Mg-Al LDH (91.85 ± 0.087%) in comparison with Mg-Al-Ni LDH (35.97 ± 0.093%), at 20 °C. It was found that the adsorption kinetics is best described by the pseudo-second-order model. The results indicated that LDHs can be considered as a potential material for adsorption of other metallic ions from wastewater.

Synthesis of Fe3O4 Nanoparticles Prepared by Various Surfactants and Studying their Characterizations

2008 ◽  
Vol 273-276 ◽  
pp. 22-27 ◽  
Author(s):  
Ali Shokuhfar ◽  
S. Alibeigi ◽  
Mohammad Reza Vaezi ◽  
Sayed Khatiboleslam Sadrnezhaad
Keyword(s):  
Fe3o4 Nanoparticles ◽  
Cetyl Trimethyl Ammonium Bromide ◽  
Precipitation Method ◽  
Ammonium Bromide ◽  
X Ray Diffraction ◽  
Mixed Salt ◽  
Magnetite Fe3o4 ◽  
Cetyl Trimethyl Ammonium ◽  
Size And Morphology ◽  
Co Precipitation

Magnetite (Fe3O4) nanoparticles were prepared simply by the reverse co-precipitation method from the solution of ferrous/ferric mixed salt in the presence of cationic surfactant (cetyl trimethyl ammonium bromide, CTAB) and nonionic surfactant (Polyethylene glycol, PEG) in two concentrations. Meanwhile, Fe3O4 nanoparticles without surfactant are also synthesized under the same condition for comparison. In addition via the reverse co-precipitation method, the pH which is an important factor in synthesis of magnetite was controlled at high values easily. The experimental results reveal that addition of surfactants affected on the size and morphology of the nanoparticles based on the X-ray diffraction (XRD) and scanning electron microscope (SEM) characterizations.

Preparation and characterization of iron oxide nanoparticles coated with chitosan for removal of Cd(II) and Cr(VI) from aqueous solution

2014 ◽  
Vol 70 (6) ◽  
pp. 1004-1010 ◽  
Author(s):  
Th. I. Shalaby ◽  
N. M. Fikrt ◽  
M. M. Mohamed ◽  
M. F. El Kady
Keyword(s):  
Electron Microscope ◽  
Magnetic Nanoparticles ◽  
Magnetic Nanomaterials ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
Toxic Heavy Metals ◽  
Transmission Electron ◽  
Magnetite Fe3o4 ◽  
Co Precipitation

This study investigated the applicability of magnetite Fe3O4 nanoparticles coated with chitosan (CMNs) for the removal of some toxic heavy metals from simulated wastewater. Magnetic nanomaterials were synthesized using the co-precipitation method and characterized by transmission electron microscope, scanning electron microscope, X-ray diffraction, and Fourier transformer infrared spectroscopy. The magnetic properties of the prepared magnetic nanoparticles were determined by a vibrating-sample magnetometer. Batch experiments were carried out to determine the adsorption kinetics of Cr(VI) and Cd(II) by magnetic nanoparticles. It is noteworthy that CMNs show a highly efficient adsorption capacity for low concentration Cr(VI) and Cd(II) ions solution, which can reach 98% within 10 min.

Preparation and Characterization of Nanocrystalline CaO-ZrO2 Powders by Microwave Pyrolysis

2014 ◽  
Vol 602-603 ◽  
pp. 97-100
Author(s):  
Bing Bing Fan ◽  
Ke Ke Guan ◽  
Hao Chen ◽  
Xiao Xuan Pian ◽  
Chen Yang Wang ◽  
...  
Keyword(s):  
Phase Transition ◽  
Reaction Temperature ◽  
Pyrolysis Temperature ◽  
Precipitation Method ◽  
Microwave Pyrolysis ◽  
Model Chamber ◽  
Co Precipitation ◽  
Average Size

CaO(15%)-ZrO2nano-powders were prepared by microwave pyrolysis in a multi-model chamber at the temperature ranging from 650°C to 800°C, with the precursor processed at different reaction temperature from 0°C to 80°C by chemical co-precipitation method. XRD and SEM techniques were used to characterize the phase transition and micrograph of powders. It is found that the content of m-ZrO2phase decreased with the increasing of reaction temperature and pyrolysis temperature. The high dispersed and superfine nano-powders were obtained at the pyrolysis temperature of 750°C for 20 min at 80°C. And only cubic ZrO2phase were detected in CaO (15%)-ZrO2powders and the average size of the powders is about 41 nm.

scholarly journals Structural Stability of Ni/Al Layered Double Hydroxide Supported on Graphite and Biochar Toward Adorption of Congo Red

2021 ◽  
Vol 6 (2) ◽  
pp. 85-95
Author(s):  
Patimah Mega Syah Bahar Nur Siregar ◽  
Neza Rahayu Palapa ◽  
Alfan Wijaya ◽  
Erni Salasia Fitri ◽  
Aldes Lesbani
Keyword(s):  
Aqueous Solution ◽  
Adsorption Capacity ◽  
Layered Double Hydroxide ◽  
Congo Red ◽  
High Performance ◽  
Precipitation Method ◽  
First Order ◽  
Xrd Diffraction ◽  
Co Precipitation ◽  
Double Hydroxide

In this research, Ni/Al layered double hydroxide (LDH) was modified by using co-precipitation method to generate Ni/Al-graphite (Ni/Al-GF) and Ni/Al-biochar (Ni/Al-BC). The adsorbents were applied to remove Congo Red from aqueous solution. The obtained samples were characterized by using XRD, FTIR, BET and TG-DTA. The XRD diffraction pattern of Ni/Al LDH, Ni/Al-GF, and Ni/Al-BC presented the formation of composite with decreasing crystallinity. The surface area modified LDHs was higher than the pristine materials, which was obtained 15.106 m2/g, 21.595 m2/g and 438.942 m2/g for Ni/Al-LDH, Ni/Al-GF, Ni/Al-BC respectively. The adsorption of Congo Red on the materials was tested at diferent parameters and the results exhibited that Congo Red adsorption on LDHs were pseudo-first-order (PFO) kinetic, spontaneous, endothermic and followed Langmuir model. The adsorbents removed Congo Red by high performance stability with adsorption capacity was 116.297 mg/g for Ni/Al-GF and 312.500 mg/g for Ni/Al-BC. These adsorption capacity was higher than the pristine LDH (61.728 mg/g). The regeneration process which carried out for five cycles showed that Ni/Al-GF and Ni/Al-BC have stable structures as reuse adsorbents for Congo Red from aqueous solution.

scholarly journals Malachite Green Removal by Zn/Al-citrate LDHs in Aqueous Solution

2020 ◽  
Vol 5 (2) ◽  
pp. 59
Author(s):  
Nurlisa Hidayati ◽  
Risfidian Mohadi ◽  
Elfita Elfita ◽  
Aldes Lesbani
Keyword(s):  
Aqueous Solution ◽  
Malachite Green ◽  
Adsorption Process ◽  
Langmuir Adsorption Isotherm ◽  
Precipitation Method ◽  
Chemical Adsorption ◽  
Langmuir Adsorption ◽  
Batch System ◽  
Isotherm Adsorption ◽  
Co Precipitation

Zn/Al-citrate LDHs was synthesized using co precipitation method at basic condition and the material were applied as adsorbent of malachite green (MG) dye in aqueous medium using batch system. Adsorption of MG onto Zn/Al-citrate was investigated through kinetic, isotherm adsorption and thermodynamic studies. Kinetic model was fitted PSO than PFO for MG adsorption. The rate of adsorption 𝑘2 for Zn/Al LDHs was 0.000692 g.mg−1 min−1 and 0.000371 g for Zn/Al-citrate LDHs.mg−1 min−1. Adsorption of malachite green onto Zn/Al LDHs and Zn/Al citrate LDHs was investigated and following Langmuir adsorption isotherm model shows chemical adsorption process. The adsorption capacity maximum of Zn/Al-citrate is 333 mg/g from Zn/Al LDHs is only 111 mg/g. Thermodynamic parameters of Zn/Al-citrate confirmed adsorption process was endothermic and spontaneous.

Potential of Functionalized Magnetite (Fe3O4) in Decontamination of Pathogenic Bacteria from Milk

2019 ◽  
Vol 41 (6) ◽  
pp. 1014-1014
Author(s):  
Aneela Hameed Aneela Hameed ◽  
Hafiza Mehvish Mushtaq Hafiza Mehvish Mushtaq ◽  
Saeed Akhtar Saeed Akhtar ◽  
Tariq Ismail Tariq Ismail ◽  
Majid Hussain Majid Hussain ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Magnetic Nanoparticles ◽  
Pathogenic Bacteria ◽  
High Surface ◽  
Nutritional Composition ◽  
Ethylene Diamine ◽  
Precipitation Method ◽  
Magnetite Fe3o4 ◽  
Co Precipitation

Magnetite (Fe3O4) is getting popular due to its super-paramagnetic properties, high biocompatibility and lack of toxicity to humans. Magnetite (Fe3O4) nanoparticles have high surface energy thus these nanoparticles aggregate quickly. This aggregation strongly affects the efficiency of these nanoparticles. So these magnetite nanoparticles are coated with organic or inorganic substance to prevent aggregation. These coatings not only stabilize magnetic nanoparticles but can also be used for further functionalization. The aim of this study was to evaluate the efficiency of functionalized magnetite to remove pathogenic bacteria (E.coli and B.cereus) from milk considering binding capability of magnetite with bacterial cell wall. Magnetite (Fe3O4) was prepared by co-precipitation method and subsequently functionalized with oleic acid (OA) and ethylene diamine (EDA). In present study role of magnetite (Fe3O4) and functionalized magnetite (EDA-Fe3O4, OA-Fe3O4) in removal of pathogenic bacteria (E.coli and B.cereus) from milk was investigated. The morphology of functionalized magnetite was determined by Scanning Electron microscopy (SEM). Their removal efficiency was studied based on time (10, 20 and 30 minutes). Concentration of uncoated magnetite (Fe3O4) and coated magnetite (EDA-Fe3O4, OA-Fe3O4) was fixed at 4mg/50mL. Magnetite was successfully synthesized in range of and#177;3nm. Highest capturing efficiency (74.45%) of oleic acid magnetite (OA-Fe3O4) was observed for Bacillus cereus at 30 minutes. However for Escherichia coli, both ethylene-diamine magnetite (EDA-Fe3O4) and oleic acid magnetite (OA-Fe3O4) showed maximum capturing efficiency (61.65% and 63.91% respectively). It was concluded from the study that magnetite coated with oleic acid and ethylenediamine removed pathogenic bacteria from milk efficiently. However, more research is required to study the effect of these magnetic nanoparticles on nutritional composition of milk.

scholarly journals Adsorption of [AuCl4]– on Ultrasonically and Mechanical-Stirring Assisted Mg/Al-NO3 Hydrotalcite-Magnetite

2018 ◽  
Vol 16 (3) ◽  
pp. 268 ◽  
Author(s):  
Triastuti Sulistyaningsih ◽  
Sri Juari Santosa ◽  
Dwi Siswanta ◽  
Bambang Rusdiarso
Keyword(s):  
Adsorption Capacity ◽  
Precipitation Method ◽  
Order Kinetic ◽  
Weakly Bound ◽  
Ph Optimum ◽  
Mechanical Stirring ◽  
Naoh Solution ◽  
Radiation Technique ◽  
Pseudo Second Order ◽  
Co Precipitation

It has been examined the application of Mg/Al-NO3 hydrotalcite-magnetite synthesized mechanically (MHT) and ultrasonically (UMHT) by co-precipitation method as adsorbents for [AuCl4]– from aqueous solution. Two techniques of synthesis were conducted to determine the effect on the increase of adsorption ability of the [AuCl4]–. Magnetite and Mg/Al-NO3 hydrotalcite-magnetite synthesized by co-precipitation with modifications hydrothermal treatment at 120 °C for 5 h. The adsorbents were characterized by Fourier Transform Infrared (FTIR) spectroscopy, X-ray diffraction (XRD), Scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) and Vibrating sample magnetometer (VSM). Adsorption studies were done by getting the optimum pH, optimum contact time and the optimum concentration. A result of the adsorption study of [AuCl4]– on both adsorbents was optimum at pH 3 and fitted well to Langmuir isotherm and pseudo second-order kinetic models. The adsorption capacity of UMHT (ultrasonic technique) was 66.67 mg g-1 and it was higher than that of MHT (mechanic technique), i.e. 31.25 mg g-1. This shows that the ultrasonic radiation technique can increase the adsorption capacity of the [AuCl4]–. Based on the desorption using 0.5 mol L-1 NaOH solution, more [AuCl4]– was eluted from MHT, indicating that [AuCl4]– was weakly bound on MHT than UMHT.

scholarly journals Effect of Indium Incorporation on the Physical Behavior of ZnS Nanoparticles

2020 ◽  
Vol 9 (3) ◽  
pp. 903-907
Keyword(s):  
Ammonium Hydroxide ◽  
Indium Content ◽  
Precipitation Method ◽  
Homogeneous Distribution ◽  
Complexing Agent ◽  
Zns Nanoparticles ◽  
Ft Ir ◽  
Co Precipitation ◽  
Average Size ◽  
Composition Properties

In–doped ZnS nanoparticles are synthesized via chemical co-precipitation method using different precursor solutions of zinc acetate (source of Zn2+ ions), sodium sulphide (source of S2- ions), indium sulphate (source of dopant In3+ ions), ammonium hydroxide (works as a complexing agent) and EDTA (as a capping agent). The effect of different concentrations of Indium (0%, 1%, 3%, and 5%) on the structure, morphology, and elemental composition properties of nanoparticles have been studied using different characterization techniques. XRD study shows the formation of cubic structure in the synthesized nanoparticles. The average size of nanoparticles calculated using Debye - Scherrer’s equation is in the range of 5.7–2.4 nm. It has been observed that the size of ZnS nanoparticles decrease with an increase in Indium concentration. SEM micrographs have explored the surface feature of the nanoparticles. It clearly shown that the morphology of spherical nanoparticles is changing with In concentration. The elemental identification and mapping has indicated the homogeneous distribution of Zinc, Sulfur and Indium content in synthesized nanoparticles. FT–IR spectra have recognized the existance of characteristics absorption peaks for In-doped ZnS

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