Fe<sub>3</sub>O<sub>4</sub>nano-particles prepared by co-precipitation method using local sands as a raw material and their application for humic acid removal

Zulfikar, Muhammad Ali; Suri, Fraulein Intan; Rusnadi,; Setiyanto, Henry; Mufti, Nandang; Ledyastuti, Mia; Wahyuningrum, Deana

doi:10.1080/00207233.2015.1108600

Cited by 21 publications

(3 citation statements)

References 54 publications

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“…The organic matter is reduced more effectively at pH 2 than at pH 3 since the amine group of chitosan undergoes complete protonation, improving its ability to interact with negatively charged organic materials at low solution pHs [8]. These results are in accordance with previous research, which showed that decreasing color due to reduced organic matter increased with decreasing pH of the solution and vice versa, decreasing color due to organic matter decreased with increasing pH of the solution [28].…”

Section: Determination Of Optimum Ph Conditionssupporting

confidence: 90%

Synthesis of Magnetic Chitosan Composite Beads as an Adsorbent for Removal of Organic Matter from Peat Water

2022

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Groundwater in peatlands has the potential to be utilized as a water source, but its high organic matter content presents challenges. This study aimed to improve the quality of peat water through the adsorption of organic matter using chitosan magnetic beads composite adsorbent. Magnetic chitosan beads (KMB) composite was synthesized by mixing chitosan, acetic acid, and a mixture of Fe2+/Fe3+ solution with a mole ratio of 1:2. This mixture was then dropped into a sodium hydroxide solution. In addition to KMB, magnetic composite beads containing glutaraldehyde crosslinking agent (KMBG) were also synthesized. The results of composites analysis using a Fourier transform infrared (FTIR) spectrophotometer showed typical Fe-O absorption bands at 582 cm-1 and 578 cm-1 for KMB and KMBG. The typical C=N absorption band for glutaraldehyde in KMBG appeared at 1631 cm-1. X-ray diffraction (XRD) analysis revealed the characteristic peaks of Fe3O4 for KMB and KMBG at 2θ = 30.2°, 35.5°, 43.2°, 57.0°, and 62.8° with an amorphous structure. The adsorption of organic matter was performed by varying the pH (2, 3, 4, and 5) of peat water and the mass of the adsorbent (50, 70, 100, 200, and 300 mg). The optimum adsorption occurred at pH 2 with an absorbent mass of 0.1 g KMB and 0.07 g KMBG. Applying KMB on peat water reduces turbidity, color, and absorbance at a wavelength of 254 nm (Aλ=254), which is better than using KMBG. These three parameters’ efficiency percentages were 44%, 78%, and 74% for KMB and 17%, 30%, and 59% for KMBG.

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Section: Determination Of Optimum Ph Conditionssupporting

confidence: 90%

Synthesis of Magnetic Chitosan Composite Beads as an Adsorbent for Removal of Organic Matter from Peat Water

2022

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“…Parallel studies have been reported by researchers, such as-solid state reaction synthesis [ 64 ], co-precipitation using nitric acid [ 65 ], and oxidation of magnetite nanoparticles prepared by co-precipitation [ 66 ].…”

Section: Synthesis Of Ionpsmentioning

confidence: 92%

Magnetic Iron Oxide Nanoparticle (IONP) Synthesis to Applications: Present and Future

et al. 2020

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Iron oxides are chemical compounds which have different polymorphic forms, including γ-Fe2O3 (maghemite), Fe3O4 (magnetite), and FeO (wustite). Among them, the most studied are γ-Fe2O3 and Fe3O4, as they possess extraordinary properties at the nanoscale (such as super paramagnetism, high specific surface area, biocompatible etc.), because at this size scale, the quantum effects affect matter behavior and optical, electrical and magnetic properties. Therefore, in the nanoscale, these materials become ideal for surface functionalization and modification in various applications such as separation techniques, magnetic sorting (cells and other biomolecules etc.), drug delivery, cancer hyperthermia, sensing etc., and also for increased surface area-to-volume ratio, which allows for excellent dispersibility in the solution form. The current methods used are partially and passively mixed reactants, and, thus, every reaction has a different proportion of all factors which causes further difficulties in reproducibility. Direct active and complete mixing and automated approaches could be solutions to this size- and shape-controlled synthesis, playing a key role in its exploitation for scientific or technological purposes. An ideal synthesis method should be able to allow reliable adjustment of parameters and control over the following: fluctuation in temperature; pH, stirring rate; particle distribution; size control; concentration; and control over nanoparticle shape and composition i.e., crystallinity, purity, and rapid screening. Iron oxide nanoparticle (IONP)-based available clinical applications are RNA/DNA extraction and detection of infectious bacteria and viruses. Such technologies are important at POC (point of care) diagnosis. IONPs can play a key role in these perspectives. Although there are various methods for synthesis of IONPs, one of the most crucial goals is to control size and properties with high reproducibility to accomplish successful applications. Using multiple characterization techniques to identify and confirm the oxide phase of iron can provide better characterization capability. It is very important to understand the in-depth IONP formation mechanism, enabling better control over parameters and overall reaction and, by extension, properties of IONPs. This work provides an in-depth overview of different properties, synthesis methods, and mechanisms of iron oxide nanoparticles (IONPs) formation, and the diverse range of their applications. Different characterization factors and strategies to confirm phase purity in the IONP synthesis field are reviewed. First, properties of IONPs and various synthesis routes with their merits and demerits are described. We also describe different synthesis strategies and formation mechanisms for IONPs such as for: wustite (FeO), hematite (α-Fe2O3), maghemite (ɤ-Fe2O3) and magnetite (Fe3O4). We also describe characterization of these nanoparticles and various applications in detail. In conclusion, we present a detailed overview on the properties, size-controlled synthesis, formation mechanisms and applications of IONPs.

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“…Oleh karena itu, metode adsorpsi dipilih untuk pengolahan air gambut karena murah, mudah untuk dilakukan, dan banyak senyawa organik yang hilang. Adsorben yang telah digunakan untuk adsorpsi pada air gambut di antaranya material komposit [4], [5], nanopartikel [6], [7], zeolit [8], [9], geopolimer [10], [11] dan biomassa [12], [13]. Meskipun metode adsorpsi memiliki beberapa kelemahan seperti adsorben yang jenuh akan menyebabkan pencemaran dan efektivitas adsorpsi bergantung pada pH, hal ini dapat diatasi dengan menggunakan adsorben Ca-alginat.…”

Section: Pendahuluanunclassified

Ca-ALGINAT UNTUK ADSORPSI Fe DAN Mn PADA AIR GAMBUT

Harfinda

2020

J. Kim. Mul

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Ca-alginate for the adsorption of Fe and Mn in peat water has been carried out using a batch method. Brownish water color, low pH, and high content of Fe and Mn metals are obstacles in direct utilization of peat water. Peat water treatment can be done by the adsorption method. The stages of this study began with the preparation of the adsorbent by dripping Na-alginate solution into a variety of CaCl2 solution concentrations. Furthermore, the adsorption of peat water was carried out by batch method with variations in the contact time and mass of the adsorbent to get the adsorbent with the highest % removal. The optimal contact time for Fe and Mn adsorption on peat water is 6 hours. The optimal % removal value for the influence of Fe adsorption contact time for Ca-alginate variations of 0.1 M and 0.2 M CaCl2 solution were 20.38% and 21.19%, respectively. The optimal % removal value for the influence of Mn adsorption contact time for Ca-alginate variations of 0.1 M and 0.2 M CaCl2 solution were 30.98% and 41.37%, respectively. The optimal mass of adsorbent for Fe and Mn adsorption in peat water is 0.75 g. The optimal % removal value for the influence of Fe adsorption mass adsorption for Ca-alginate variations of 0.1 M and 0.2 M CaCl2 solution were 79.28% and 21.67%, respectively. The optimal % removal value for the mass effect of Mn adsorption adsorption for Ca-alginate variation of 0.1 M and 0.2 M CaCl2 solution respectively at 24.44% and 26.13%.

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Fe₃O₄nano-particles prepared by co-precipitation method using local sands as a raw material and their application for humic acid removal

Cited by 21 publications

References 54 publications

Synthesis of Magnetic Chitosan Composite Beads as an Adsorbent for Removal of Organic Matter from Peat Water

Synthesis of Magnetic Chitosan Composite Beads as an Adsorbent for Removal of Organic Matter from Peat Water

Magnetic Iron Oxide Nanoparticle (IONP) Synthesis to Applications: Present and Future

Ca-ALGINAT UNTUK ADSORPSI Fe DAN Mn PADA AIR GAMBUT

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Fe3O4nano-particles prepared by co-precipitation method using local sands as a raw material and their application for humic acid removal

Cited by 21 publications

References 54 publications

Synthesis of Magnetic Chitosan Composite Beads as an Adsorbent for Removal of Organic Matter from Peat Water

Synthesis of Magnetic Chitosan Composite Beads as an Adsorbent for Removal of Organic Matter from Peat Water

Magnetic Iron Oxide Nanoparticle (IONP) Synthesis to Applications: Present and Future

Ca-ALGINAT UNTUK ADSORPSI Fe DAN Mn PADA AIR GAMBUT

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Fe₃O₄nano-particles prepared by co-precipitation method using local sands as a raw material and their application for humic acid removal