Micro-structured Materials for the Removal of Heavy Metals using a Natural Polymer Composite

Kusrini, Eny; Ayuningtyas, Karina; Mawarni, Dias Puspitaning; Wilson, Lee D.; Sufyan, Muhammad; Rahman, Arif; Prasetyanto, Yohanes Eko Adi; Usman, Anwar

doi:10.14716/ijtech.v12i2.4578

Cited by 10 publications

(5 citation statements)

References 28 publications

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“…The Sm addition to the alloy changes the microstructure of the ZRE1 base alloy. Similarly, research by (Sheggaf et al, 2017) and (Kusrini et al, 2021) showed that ZRE1 base alloys microstructure changes with the addition of Pr. The addition of Sm shows a significant effect on ZRE1 grain size in Figure 5, where the addition of 0.5 wt.% Sm reduces the grain size significantly by about 13% due to an increase in the coherency time of the alloy (Ahmad et al, 2017b).…”

Section: Figure 3 Xrd Pattern Of Zre1-xsm Alloysmentioning

confidence: 79%

Microstructure and Mechanical Properties of Magnesium ZRE1 (Mg-Zn-Zr) Alloy with Rare Earth Element (Samarium) Addition

Tukiat,

Yusuf,

Khaireez

et al. 2024

IJTech

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The influences of rare earth (RE) samarium (Sm) added contents to ZRE1 (Mg-Zn-Zr) magnesium (Mg) cast alloy over strength properties to be investigated. Sm at 0.5, 1.0, 1.5, and 2.0 wt.% were added separately as an alloying element to ZRE1 alloy. Optical Microscope (OM), X-ray powder diffraction (XRD), and scanning electron microscope Energy-dispersive X-ray (SEM/EDS) were used to investigate the microstructure of alloy, while mechanical properties investigated include Ultimate Tensile Strength (UTS)and Micro-Hardness (MH) tests. The result revealed that as the Sm level reached 1.5 wt.%, the grain size decreased by 20.9 %. Additionally, UTS and Yield Strength (YS) showed improvements of 8.5 % and 7.9 %, respectively, with the addition of 1.5 wt.% of Sm. In addition, elongation and hardness have been improved by 32.3 % and 10.9 % respectively at 1.5 wt.% Sm addition. Mg-Zn-Ce-Sm was formed as a new phase upon the addition of Sm and was detected via XRD analysis. The addition of Sm to the ZRE1 alloy had significant effects on the refinement of the material's microstructure, leading to an increase in its mechanical and physical properties. Therefore, the new ZRE1-RE magnesium alloy was developed.

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Section: Figure 3 Xrd Pattern Of Zre1-xsm Alloysmentioning

confidence: 79%

Microstructure and Mechanical Properties of Magnesium ZRE1 (Mg-Zn-Zr) Alloy with Rare Earth Element (Samarium) Addition

Tukiat,

Yusuf,

Khaireez

et al. 2024

IJTech

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“…The peak at the band 3000-3500 cm -1 indicates the OH stretching vibrations in all samples (Kusrini et al, 2021). In the sludge sample, the OH wave number was at 3744.40 cm -1 with a fairly wide peak.…”

Section: Ftir and X-ray Analysismentioning

confidence: 89%

Preparation and Characterization of Sound-Absorbent Based on Polystyrene Reinforced Primary Sludge and Fly Ash from Pulp Mill

Hiadayani,

Wirjosentono,

Nasution

et al. 2023

IJTech

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Efforts to utilize and improve the value of pulp waste have been done by using primary sludge (still containing cellulose) and fly ash as a filler to produce composite foam polystyrene (PS)based as sound absorbent. In this study, the composite foam was produced by mixing primary sludge and fly ash with several compositions such as PS, PS/PS-g-MA/primary sludge/fly ash (80/10/10/0), (80/10/7/3), (80/10/5/5), (75/10/10/5), and (75/10/12/3). The composite was characterized based on ISO 11654:1997, mechanical properties, thermal analysis using TGA and DSC, morphology using SEM, crystallinity using XRD, and chemical analysis using FTIR. The results showed that the band at 1600.63 cm -1 was sharper due to a chemical reaction being formed between PS, primary sludge, and fly ash. The XRD analysis showed a new diffraction peak in the 2 = 21-24 o . The morphology analysis showed that primary sludge and fly ash were uniformly dispersed into PS, increasing the mechanical properties and decreasing the melting point of the PS foam composite. The sound-absorbing composite produced had qualified ISO 11654:1997 on the rating level of the sound absorption coefficient on materials for rooms with sound absorption classes D and C with the value of w 0.328-0.793.

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“…Chitosan is an exemplary capping agent for the preparation of NPs in aqueous media. Chitosan is a versatile polysaccharide produced from the partial deacetylation of chitin that yields a biodegradable, biocompatible, and non-toxic biopolymer that has wide utility in advanced biomedical and therapeutic applications [19][20][21][22][23]. Chitosan displays antimicrobial properties, which relate to its glucosamine units and protolytic behavior that favors adhesion to bacterial surfaces with negative surface charges [24].…”

Section: Introductionmentioning

confidence: 99%

Nanocomposites of Terbium Sulfide Nanoparticles with a Chitosan Capping Agent for Antibacterial Applications

et al. 2023

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This study aims to investigate the effect of alkaline pH on the bottom-up synthesis of nanocomposites (NCs) containing terbium sulfide nanoparticles (Tb2S3 NPs), where chitosan (CS) was employed as a capping agent, along with evaluation of the antibacterial activity of these NCs. The NCs were characterized using spectroscopy (FESEM-EDX, Raman, FTIR, XRD, XPS, and DLS), zeta-potential, and TGA. The results of FE-SEM, XPS, Raman, and FTIR characterization support the formation of CS-Tb2S3 NPs. A pH variation from 9 to 11 during composite formation was shown to affect the size and composition of NCs. The antibacterial activity of CS-Tb2S3 NCs was studied by coating onto commercial contact lenses, where the best loading efficiency of NCs was 48%. The NCs prepared at pH 10 (without contact lenses) had greater antibacterial activity against Staphylococcus aureus, with a zone of inhibition diameter of 7.15 mm. The coating of NCs onto commercial contact lenses was less effective for inhibition of Staphylococcus aureus, in contrast with the greater activity observed for tetracycline. CS-Tb2S3 NCs offer promising antimicrobial properties that can be further optimized by control of the surface loading and accessibility of Tb2S3 NPs through further study of the role of the chitosan capping agent, since steric effects due to CS are likely to attenuate antimicrobial activity via reduced electron transfer in such nanocomposite systems.

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Micro-structured Materials for the Removal of Heavy Metals using a Natural Polymer Composite

Cited by 10 publications

References 28 publications

Microstructure and Mechanical Properties of Magnesium ZRE1 (Mg-Zn-Zr) Alloy with Rare Earth Element (Samarium) Addition

Microstructure and Mechanical Properties of Magnesium ZRE1 (Mg-Zn-Zr) Alloy with Rare Earth Element (Samarium) Addition

Preparation and Characterization of Sound-Absorbent Based on Polystyrene Reinforced Primary Sludge and Fly Ash from Pulp Mill

Nanocomposites of Terbium Sulfide Nanoparticles with a Chitosan Capping Agent for Antibacterial Applications

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