Preparation of magnetic chitosan using local iron sand for mercury removal

Rahmi, Rahmi; Fathurrahmi,; Lelifajri,; Purnamawati, Fitri

doi:10.1016/j.heliyon.2019.e01731

Cited by 38 publications

(17 citation statements)

References 30 publications

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“…Isolation of Fe 3 O 4 from local sand iron was modified from Rahmi et al [15]. Local sand iron was sieved by 100 mesh siever.…”

Section: Isolation Of Fe 3 O 4 From Local Sand Ironmentioning

confidence: 99%

“…Besides that, there are other peaks with a lower intensity which are thought to be maghemite (γ-Fe 2 O 3 ) based on the standard Fe 2 O 3 (gamma)-ICSD#172905. Meanwhile, for the diffractogram of the nanocomposite, the relatively low peak intensity corresponds to the crystallinity of chitosan that reduces after cross-linking reactions [15]. Consequently, this amorphous structure can increase the accessibility of methylene blue to be adsorbed on the nanocomposite via active sites [15].…”

Section: The Isolation Of Fe 3 O 4 From Local Iron Sand and Synthesis...mentioning

confidence: 99%

“…Protonated amine and hydroxyl groups are the centers of reactions between chitosan and other substances. These groups will interact with dye compounds by proton exchanges and/or coordination bonding formation [15]. However, chitosan is prone to coagulation, poor mechanical strength, and soluble in acid solution, thus limiting its usefulness as an adsorbent [16][17].…”

Section: ■ Introductionmentioning

confidence: 99%

“…In addition, chitosan/ Fe 3 O 4 composite was also effective to adsorb heavy metals, for instance, Pb(II) and Ni(II) [19]. Then, removal of mercury content was effectively conducted using magnetic chitosan, which was cross-linked with glutaraldehyde [15]. Meanwhile, chitosan/Fe 3 O 4 composite is generally synthesized from commercial substances, for instance, FeCl 3 , FeSO 4 , or Fe(III) acetylacetonate with commercial chitosan, but it is known to have an expensive cost.…”

Section: ■ Introductionmentioning

confidence: 99%

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Fabrication of Chitosan/Fe3O4 Nanocomposite as Adsorbent for Reduction Methylene Blue Contents

Harimu

Wang²,

Nasrudin³

et al. 2022

Indones. J. Chem.

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Methylene blue (MB) is a dye in wastewater from textile industries that pollutes the water environment. Reduction of its content is necessary for protecting humans and the surrounding environment. This study fabricated chitosan/Fe3O4 nanocomposite through the mixture of chitosan from crab shell waste and magnetite (Fe3O4) from local sand iron with sodium tripolyphosphate (STPP)-sulfate crosslinker as an adsorbent to reduce methylene blue content. The obtained composite was characterized by Fourier Transform Infrared (FTIR) Spectrophotometer and X-Ray Diffraction (XRD) instrument. The contents of methylene blue before and after applying adsorbent-based nanocomposite were determined using an ultraviolet-visible (UV-Vis) spectrophotometer. FTIR characterization results show that chitosan and chitosan/Fe3O4 nanocomposite had successfully synthesized based on the typical vibrational peaks. The deacetylation degree of chitosan was 69.79%. Fe3O4, and chitosan/Fe3O4 nanocomposite, were confirmed by XRD patterns. The chitosan/Fe3O4 nanocomposite adsorption capacity reached 45.37 mg/g when adsorption occurred with 20 mg adsorbent, pH 9, and contact time of 1.5 h. Hence, the chitosan/Fe3O4 nanocomposite in this study has potency and is applicable to adsorb MB effectively.

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“…Isolation of Fe 3 O 4 from local sand iron was modified from Rahmi et al [15]. Local sand iron was sieved by 100 mesh siever.…”

Section: Isolation Of Fe 3 O 4 From Local Sand Ironmentioning

confidence: 99%

Section: The Isolation Of Fe 3 O 4 From Local Iron Sand and Synthesis...mentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Fabrication of Chitosan/Fe3O4 Nanocomposite as Adsorbent for Reduction Methylene Blue Contents

Harimu

Wang²,

Nasrudin³

et al. 2022

Indones. J. Chem.

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“…All the following studies employed the optimum adsorption parameters obtained earlier (100 minutes contact time; pH 3). Adsorption capacity at t time (qt (mg/g)), adsorption capacity at equilibrium (qe (mg/g)), and removal percentage (%) were calculated based on the equations we had used in the previous reports [35][36][37]. For the photodegradatino using UV irradiation, a UV lamp (6 W; λ = 365 nm) was used and positioned 10 cm away from the batch container.…”

Section: Batch Adsorption/photodegradationmentioning

confidence: 99%

Synergetic photocatalytic and adsorptive removals of metanil yellow using TiO2/grass-derived cellulose/chitosan (TiO2/GC/CH) film composite

Rahmi

Lubis

Azzahra

et al. 2021

IJE

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Chitosan (CH) and cellulose are the most abundant biopolymers which could be utilized for hazardous dye removal. By incorporating TiO2 onto cellulose/CH matrix, our research aimed to achieve high metanil yellow removal by means of synergetic adsorption/photodegradation mechanism. The cellulose particles were extracted from wild grass (Imperata cylindrica L.) to obtain grass-derived cellulose (GC). Simple blending method was used to prepare TiO2/GC/CH, in which the composition was determined by simple additive weighting method (SAW). TiO2/GC/CH was characterized by means of tensile strength test (also used for SAW), Fourier Transform-Infrared (FT-IR), X-ray diffraction (XRD), differential scanning calorimetry (DSC), and scanning electron microscopy (SEM). Metanil yellow removal using TiO2/GC/CH works very well at acidic pH range. The removal follows the pseudo-second-order kinetic (R 2 = 0.997) and Langmuir isotherm (R 2 = 0.998) modellings. High qm obtained from the metanil yellow removal under UV irradiation (qm = 171.527) proves the synergism between adsorption and photodegradation. The developed TiO2/GC/CH could be potentially used in the wastewater treatment for azo dye removal.

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