Adsorption of Iron (II) Ion by Using Magnetite-Bentonite-Based Monolith from Water

2021 ◽  
Vol 892 ◽  
pp. 10-16
Author(s):  
Ismi Nurul ◽  
Syamsuddin Yanna ◽  
Adisalamun ◽  
Aulia Sugianto Veneza ◽  
Darmadi
Keyword(s):  
Magnetic Properties ◽  
Magnetic Particles ◽  
Solution Concentration ◽  
Iron Solution ◽  
Monolayer Adsorption ◽  
Coprecipitation Process ◽  
Non Linear ◽  
Magnetic Loading ◽  
Langmuir Constants

In this study, iron removal was carried out by the adsorption process as a well-known method of removing heavy metal. Natural bentonite with magnetic properties in a monolithic form or Magnetite-Bentonite-based Monolith (MBM) adsorbent was used as an adsorbent to remove Iron (II) ion from the aqueous solution. The magnetic properties of adsorbents are obtained by adding magnetite (Fe3O4), which is synthesized by the coprecipitation process. The characterization of magnetic properties was performed using the Vibrating Sample Magnetometer (VSM). VSM results showed that the magnetic particles were ferromagnetic. Adsorption efficiency, isotherm model, and adsorption kinetics were investigated in a batch system with iron solution concentration varied from 2 to 10 mg/L and magnetite loading at 2% and 5% w/w. The highest removal efficiency obtained reached 89% with a 5% magnetite loading. The best fit to the data was obtained with the Langmuir isotherm (non-linear) with maximum monolayer adsorption capacity (Qo) at 5% magnetic loading MBM adsorbent is 0.203 mg/g with Langmuir constants KL and aL are 2.055 L/g and 10.122 L/mg respectively. The pseudo-first-order (non-linear) kinetic model provides the best correlation of the experimental data with the rate of adsorption (k1) with magnetite loading 2% and 5%, respectively are 0.024 min-1 and 0.022 min-1.

Ultrafine magnetic particles dispersed in silica: Characterization of cobalt iron citrate precursor and magnetic properties

2008 ◽  
Vol 43 (5) ◽  
pp. 1112-1118 ◽  
Author(s):  
Sagrario M. Montemayor ◽  
L.A. García-Cerda ◽  
J.R. Torres-Lubián ◽  
O.S. Rodríguez-Fernández
Keyword(s):  
Magnetic Properties ◽  
Magnetic Particles ◽  
Iron Citrate ◽  
Cobalt Iron ◽  
Citrate Precursor

Formation and Magnetic Characterization of Magnesium Oxide / Iron Nano Composite Particles

2011 ◽  
Vol 236-238 ◽  
pp. 1927-1930
Author(s):  
Yuan Yuan Kong ◽  
Hao Zhou
Keyword(s):  
Magnetic Properties ◽  
Magnetic Particles ◽  
Drug Carriers ◽  
Spherical Particles ◽  
Reactant Ratio ◽  
Nano Composite ◽  
Future Drug ◽  
Micro Morphology

Nano-sized composite magnetic particles MgO /Fe were in-situ combustion synthesized at 620°Cfor the Mg-70.9wt%Fe3O4 system. In this paper, we discussed the reactant ratio on the influence of micro-morphology and the magnetic properties of nanoparticles. It was indentified that: Mg(29.1wt%) was the suitable reactant ratio, the sintered composite spherical particles with mean diameter 40nm distributed evenly, particles had good soft magnetic properties, and it was the future drug carriers materials.

Adsorption of Mercury(II) Ion in Aqueous Solution by Using Bentonite-Based Monolith

2021 ◽  
Vol 885 ◽  
pp. 77-84
Author(s):  
Darmadi ◽  
Mahidin ◽  
Siti Syifa Azzahra ◽  
Munadiya Masrura
Keyword(s):  
Aqueous Solution ◽  
Metal Removal ◽  
Batch Reactor ◽  
Heavy Metal Removal ◽  
Solution Concentration ◽  
Environmental Safety ◽  
Adsorption Efficiency ◽  
Ion Removal ◽  
Non Linear ◽  
Langmuir Constants

The removal of mercury from the waterbody remains a severe challenge in ensuring environmental safety due to its highly toxic and non-biodegradable properties. Adsorption is an evidently effective method for heavy metal removal in water. This research aims to study the mercury (II) ion adsorption behavior in aqueous solution onto extruded natural bentonite in monolithic structure, bentonite-based monolith (BBM) adsorbent. BBM was characterized by XRD, BET, and SEM, the results verify BBM could improve adsorption performance assumed on its structure. Adsorption efficiency, isotherm model, and adsorption kinetic were investigated. Experiments were performed in a lab-scale batch reactor with mercury solution concentration varied from 1 to 5 mg/L. The maximum adsorption efficiency discovered to be 63,9%. The experimental data fitted well to Langmuir isotherm (non-linear) and kinetic model pseudo first order (non-linear), revealing the maximum monolayer capacity (Qo) of BBM to be 0,187 mg/g with Langmuir constants KL and aL are 0,215 L/g dan 1,151 L/mg respectively. These value confirms that BBM adsorbent encompasses tremendous potential for mercury (II) ion removal in a solution.

Synthesis and Characterization of PEG-Modified ZnGd0.1Fe1.9O4 Ferrite Nanoparticles for Interstitial Hyperthermia to Tumor

2007 ◽  
Vol 334-335 ◽  
pp. 1209-1212
Author(s):  
Ai Hua Yao ◽  
De Ping Wang ◽  
Wen Hai Huang
Keyword(s):  
Magnetic Properties ◽  
Remanent Magnetization ◽  
Magnetic Measurements ◽  
Magnetic Behavior ◽  
Ferrite Nanoparticles ◽  
Slight Reduction ◽  
Interstitial Hyperthermia ◽  
Coprecipitation Process ◽  
Good Biocompatibility

PEG-modified ZnGd0.1Fe1.9O4 ferrite nanoparticles were synthesized by a coprecipitation process combined with a microemulsion technique. The effect of modification on the structure, magnetic properties of ZnGd0.1Fe1.9O4 nanoparticles was also investigated by XRD, FTIR, TEM and VSM. The results showed immobilizing PEG on the surfaces of magnetic nanoparticles effectively improved their dispersibility. Magnetic measurements indicated that the as-prepared PEG-modified nanoparticles exhibited relatively high magnetic properties, although a slight reduction in saturation and remanent magnetization were observed compared with unmodified samples. Therefore, with promising high magnetic behavior and potentially good biocompatibility, PEG-modified ZnGd0.1Fe1.9O4 ferrite nanoparticles would be feasible as thermoseeds for interstitial hyperthermia to tumor.

AEM analysis of crystallization in Ti-based amorphous alloys

1983 ◽  
Vol 41 ◽  
pp. 270-271
Author(s):  
A.R. Pelton ◽  
A.F. Marshall ◽  
Y.S. Lee
Keyword(s):  
Magnetic Properties ◽  
Amorphous Alloys ◽  
Amorphous Materials ◽  
Isothermal Annealing ◽  
Amorphous Matrix ◽  
Nucleation And Growth ◽  
Current Interest ◽  
Amorphous Films ◽  
Electrical And Magnetic Properties

Amorphous materials are of current interest due to their desirable mechanical, electrical and magnetic properties. Furthermore, crystallizing amorphous alloys provides an avenue for discerning sequential and competitive phases thus allowing access to otherwise inaccessible crystalline structures. Previous studies have shown the benefits of using AEM to determine crystal structures and compositions of partially crystallized alloys. The present paper will discuss the AEM characterization of crystallized Cu-Ti and Ni-Ti amorphous films.Cu60Ti40: The amorphous alloy Cu60Ti40, when continuously heated, forms a simple intermediate, macrocrystalline phase which then transforms to the ordered, equilibrium Cu3Ti2 phase. However, contrary to what one would expect from kinetic considerations, isothermal annealing below the isochronal crystallization temperature results in direct nucleation and growth of Cu3Ti2 from the amorphous matrix.

Mn-Mo-O Catalysts for Methanol Oxidation. I. Preparation and Characterization of the Catalysts

1992 ◽  
Vol 57 (12) ◽  
pp. 2529-2538 ◽  
Author(s):  
Krasimir Ivanov ◽  
Penka Litcheva ◽  
Dimitar Klissurski
Keyword(s):  
Methanol Oxidation ◽  
Solution Concentration ◽  
Alkaline Media ◽  
Acidic Media ◽  
Chemical Methods ◽  
X Ray ◽  
Ph Values ◽  
Precipitate Composition

Mn-Mo-O catalysts with a different Mo/Mn ratio have been prepared by precipitation. The precipitate composition as a function of solution concentration and pH was studied by X-ray, IR, thermal and chemical methods. Formation of manganese molybdates with MnMoO4.1.5H2O, Mn3Mo3O12.2.5H2O, and Mn3Mo4O15.4H2O composition has been supposed. It is concluded that pure MnMoO4 may be obtained in both acid and alkaline media, the pH values depending on the concentration of the initial solutions. The maximum Mo/Mn ratio in the precipitates is 1.33. The formation of pure Mn3Mo4O15.4H2O is possible in weakly acidic media. This process is favoured by increasing the concentration of initial solutions.

Non-linear imaging and characterization of atherosclerotic arterial tissue using combined SHG and FLIM microscopy

2015 ◽  
Vol 8 (4) ◽  
pp. 347-356 ◽  
Author(s):  
Riccardo Cicchi ◽  
Enrico Baria ◽  
Christian Matthäus ◽  
Marta Lange ◽  
Annika Lattermann ◽  
...  
Keyword(s):  
Arterial Tissue ◽  
Non Linear

scholarly journals Green synthesis and characterization of hexaferrite strontium-perovskite strontium photocatalyst nanocomposites

2020 ◽  
Vol 43 (1) ◽  
pp. 26-42 ◽  
Author(s):  
Zahra Hajian Karahroudi ◽  
Kambiz Hedayati ◽  
Mojtaba Goodarzi
Keyword(s):  
Magnetic Properties ◽  
Green Synthesis ◽  
Sol Gel ◽  
Synthesis Method ◽  
Combustion Method ◽  
Lemon Juice ◽  
X Ray Diffraction ◽  
X Ray ◽  
Auto Combustion

AbstractThis study presents a preparation of SrFe12O19– SrTiO3 nanocomposite synthesis via the green auto-combustion method. At first, SrFe12O19 nanoparticles were synthesized as a core and then, SrTiO3 nanoparticles were prepared as a shell for it to manufacture SrFe12O19–SrTiO3 nanocomposite. A novel sol-gel auto-combustion green synthesis method has been used with lemon juice as a capping agent. The prepared SrFe12O19–SrTiO3 nanocomposites were characterized by using several techniques to characterize their structural, morphological and magnetic properties. The crystal structures of the nanocomposite were investigated via X-ray diffraction (XRD). The morphology of SrFe12O19– SrTiO3 nanocomposite was studied by using a scanning electron microscope (SEM). The elemental composition of the materials was analyzed by an energy-dispersive X-ray (EDX). Magnetic properties and hysteresis loop of nanopowder were characterized via vibrating sample magnetometer (VSM) in the room temperature. Fourier transform infrared spectroscopy (FTIR) spectra of the samples showed the molecular bands of nanoparticles. Also, the photocatalytic behavior of nanocomposites has been checked by the degradation of azo dyes under irradiation of ultraviolet light.

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