Synthesis and characterization of magnetic Fe3O4@CaSiO3 composites and evaluation of their adsorption characteristics for heavy metal ions

Liu, Lihua; Liu, Jinyan; Zhao, Lu; Yang, Zhichao; Lv, Chaoqiang; Xue, Jianrong; Tang, Anping

doi:10.1007/s11356-019-04352-6

Cited by 39 publications

(13 citation statements)

References 57 publications

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“…It is mainly composed of Fe 3 O 4 and contains impurities like SiO 2 , Al 2 O 3 , CaO, and MgO in low amounts. Therefore, MC exhibits similar properties to pure Fe 3 O 4 [39][40][41] and can be used as a substitute for Fe 3 O 4 in AMCs.…”

Section: Introductionmentioning

confidence: 92%

Investigation of magnetite concentrate utilization as reinforcement in aluminum matrix composites

Birol

Mısırlıoğlu

Çakιr

2022

Journal of Composite Materials

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The utilization of harder particles with magnetic properties as reinforcement in aluminum matrix composites (AMCs) enhances the mechanical and magnetic properties of aluminum. Present study investigates the utilization of magnetite concentrate (MC), which is composed of mainly Fe3O4, as reinforcement in AMCs. To achieve this goal, commercially pure Al and MC powders were blended (0–40 wt.% of MC) and ground by high energy ball milling, pressed, and sintered at 600°C for 30 min under an argon atmosphere. The products were characterized by XRD, and SEM analyses. Also, the density and porosity of the samples were determined by Archimedes’ principle. According to the results, it was observed that with the increasing reinforcement amount, agglomeration of the MC particles inside the Al matrix, as well as the porosities of the samples, increased. 10–20 wt. % of MC containing samples, the porosity values were obtained around 12 vol. %, however higher reinforcement amounts, raised the porosity values to 17.33 vol. % linearly. With the increment in both nonconductive MC particles and pores, the electrical conductivity of the samples decreased linearly. On the other hand, hard reinforcement particles played a positive role in both hardness and wear properties and a 43.37 HB of hardness value and 0.197 m3/N.m × 10−12 specific wear rate was obtained for the sample containing 40 wt. %, MC. In addition, an increase in magnetic properties was observed in direct proportion to the amount of MC particles added, up to 31 Am2.kg−1 of saturation magnetization.

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Section: Introductionmentioning

confidence: 92%

Investigation of magnetite concentrate utilization as reinforcement in aluminum matrix composites

Birol

Mısırlıoğlu

Çakιr

2022

Journal of Composite Materials

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“…The quasi-second-order kinetic model assumes that chemisorption is the main rate-adjusting step in the adsorption process; this involves the process of generating valence forces when electrons are exchanged and shared between the adsorbent and the adsorbate. The equation of the quasisecond-order kinetic model can be expressed as follows (eq 6): (6) q e (mg/g) is the equilibrium adsorption capacity of metal ions, q t (mg/g) is the capacity of metal ions adsorbed at any time, and K 2 (mg/(g•min)) is the rate constant during the adsorption process.…”

Section: Adsorption Kineticsmentioning

confidence: 99%

“…Numerous factors including feedstocks and operation parameters of the pyrolysis process (temperature, duration, heating rate, and pressure) affect the yield and quality of biochar. However, the adsorption capacity of pristine biochar without modification is usually very low. , Modification typically changes the properties of biochar and increases the adsorption capacity to numerous pollutants. Functional groups on biochar surfaces can be classified into several groups: O-containing groups (e.g., carboxylic groups, phenolic groups, and lactonic groups), N-containing groups (e.g., amine-N groups, pyrrolic-N groups, and graphitic-N groups), S-containing groups (e.g., sulfonic groups), and other functional groups. , The results of previous studies indicated that the feedstock or biochar modified by acids, bases, or metal salts can enhance the adsorption capacity of pristine biochar by introducing additional functional groups onto their surfaces. − …”

Section: Introductionmentioning

confidence: 99%

Effect of Different Modification Methods on the Adsorption of Manganese by Biochar from Rice Straw, Coconut Shell, and Bamboo

Chen,

Viengvilay,

et al. 2023

ACS Omega

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The adsorption capacity of pristine biochar without modification is usually low. In this experiment, we comprehensively evaluated the adsorption of Mn(II) by biochar with different modification methods from different biomass. The biochar from rice straw, coconut shell, and bamboo was produced by pyrolysis at 600 °C under nitrogen and then modified with HNO 3 , NaOH, and Na 2 S, respectively. The results showed that the adsorption capacities of these modified biochar samples were in the order Biochar-NaOH > Biochar-Na 2 S > Biochar-HNO 3 . Among the three modification methods, biochar modified with NaOH is the optimum for the adsorption of Mn(II). However, the same method of modification has different effects on different biomass feedstocks.

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“…Mollusk shells contain 95-99.9% calcium carbonate and 0.1-5% organic material [Marxen et al, 2003;White et al, 2007]. Several adsorbent had been modified with ferrite compounds and shows high adsorption capacity, specific surface area, easy separation, physical flexibility, and chemical stability [Foroutan et al, 2020;Liu et al, 2019]. Among ferrite compounds, magnetite (Fe 3 O 4 ) has a special feature namely superparamagnetic properties.…”

Section: Introductionmentioning

confidence: 99%

Modification of Calcium Oxide from Green Mussel Shell with Iron Oxide as a Potential Adsorbent for the Removal of Iron and Manganese Ions from Acid Mine Drainage

Purwaningrum¹,

Hasanudin²,

Rachmat³

et al. 2022

J. Ecol. Eng.

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Acid mine drainage (AMD) has the characteristics of high heavy metal ion content and low pH. This study aimed to synthesize the CaO/Fe 3 O 4 composite for the adsorption of iron and manganese ions from acid mine drainage. CaO was synthesized from the shells of green mussels (Perna viridis). The CaO/Fe 3 O 4 composites were characterized using XRD, BET surface area, SEM-EDS, and VSM. The functional groups of the composite before and after adsorption were analyzed using FTIR. The adsorption of Fe(II), Fe(III), and Mn(II) ions was carried out with the batch method to determine the effect of pH, contact time, and initial concentration of metal ions. The CaO/Fe 3 O 4 composite has magnetic properties, as indicated by the saturation magnetization value of 65.49 emu/g. The Langmuir and Freundlich isotherm models were used to describe the adsorption isotherm of the composite for Fe(II), Fe(III), and Mn(II) ions. Investigations were also conducted on adsorption kinetics, including pseudo-first-order and pseudo-second-order, as well as adsorption thermodynamics comprising free energy, enthalpy, and entropy. Pseudofirst-order and Langmuir isotherms are suitable to describe the adsorption of Fe(II), Fe(III), and Mn(II) ions with adsorption capacities of Fe(III) > Fe(II) > Mn(II). Moreover, the adsorption of all ions using the composite occurred spontaneously. The removal effectiveness for Fe and Mn ions from AMD using CaO/Fe 3 O 4 composite, reached 90.41 and 97.59%, respectively, in volume 100 mL AMD, composite mass 0.4 g, and a contact time of 60 minutes.

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Synthesis and characterization of magnetic Fe3O4@CaSiO3 composites and evaluation of their adsorption characteristics for heavy metal ions

Cited by 39 publications

References 57 publications

Investigation of magnetite concentrate utilization as reinforcement in aluminum matrix composites

Investigation of magnetite concentrate utilization as reinforcement in aluminum matrix composites

Effect of Different Modification Methods on the Adsorption of Manganese by Biochar from Rice Straw, Coconut Shell, and Bamboo

Modification of Calcium Oxide from Green Mussel Shell with Iron Oxide as a Potential Adsorbent for the Removal of Iron and Manganese Ions from Acid Mine Drainage

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