Silylated-montmorillonite as co-adsorbent of chitosan composites for methylene blue dye removal in aqueous solution

Saputra, Ozi Adi; Kurnia,; Pujiasih, Septi; Rizki, Vanani Nur; Nurhayati, Betty; Pramono, Edi; Purnawan, Candra

doi:10.21924/cst.5.1.2020.182

Cited by 13 publications

(11 citation statements)

References 45 publications

(49 reference statements)

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“…The development of OH was found at 3402-3445 cm -1 which is the interlayer and intralayer of the H bond [30]. Saputra et al [31] also found a montmorillonite hydroxyl (OH) peak at 3434 cm -1 . Ravindra-Reddy et al [32] reported that this peak indicated the presence of water on the mineral surface.…”

Section: Effect Of Swamp Acidic Water On Sample Characterizationmentioning

confidence: 97%

Volume change in compacted claystone-bentonite mixtures as affected by the swamp acidic water

Arifin

Arsyad

Monica

et al. 2021

CST

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Water containing sulfuric acid with a pH up to 3 is prevalent in swampy areas. This article focuses on the effects of the solution on volume change of compacted claystone?bentonite mixture. Claystone was obtained from Banjarbakula landfill and it was mixed with bentonite on a 5, 10, 15, and 20% dry mass basis. Samples possessed the dry density of 16 kN/m3 and moisture content of 10, 15, and 20%. The odometer examined the samples' swelling and compression in both pure and acidic water. Characterization tests i.e., XRF, XRD, and FTIR were also performed. The results showed that swelling and compression were affected by initial moisture and bentonite content. Samples with a moisture content of 20% showed compression in acidic water. Acidic water changed the water absorbed on the clay surface without altering the mineral. A mixture containing 20% bentonite compacted to optimum moisture content was found at best in reducing the acidic water effects.

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Section: Effect Of Swamp Acidic Water On Sample Characterizationmentioning

confidence: 97%

Volume change in compacted claystone-bentonite mixtures as affected by the swamp acidic water

Arifin

Arsyad

Monica

et al. 2021

CST

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“…The energy of the band gap (Eg) is required by an electron to experience an excitation from the valence band to the conduction band [27]. The energy of the band gap can be calculated with the Tauc Plot method by extrapolating the correlation graph between hv as the abscissa of axis x and (αhv) 2 as the ordinate of axis y. Tauc Plot graph for TiO2 and TiO2-M (M= Cd, Co, Mn) at the calcination temperature of 300; 400; and 500 °C is shown in Figure 4. Metal ion doping results in the decreased energy of the band gap.…”

Section: Energy Of Band Gapmentioning

confidence: 99%

“…The textile industry is one of the biggest sources of water pollution, with a large amount of dye waste [1]. The negative impacts of textile production are primarily derived from the dyeing process resulting in dye wastewater, which has a chromophore groups [2]. Dye waste disposed by waste has to be managed to prevent environmental pollution.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of Remazol Brilliant Blue R and Remazol Yellow FG using TiO2 doped Cd, Co, Mn

Purnawan

Wahyuningsih

Aniza

et al. 2021

Bull. Chem. React. Eng. Catal.

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TiO2 and TiO2 doped Cd, Co, Mn (TiO2-M) were synthesized with a sol-gel method, and the photocatalytic activity of Remazol Brilliant Blue R and Remazol Yellow FG has been conducted. TiO2-M (Cd, Co, Mn) was synthesized with the mol Ti:M ratio of 3:1, and the materials were calcined at 300, 400, and 500 °C. The materials were characterized by X-ray Diffraction (XRD), Scanning Electron Microscopy-Energy Dispersive X-ray (SEM-EDX), and UV-Vis Reflectance. The XRD result shows that at the temperature of 300 °C TiO2 and TiO2-M formed tend to be amorphous. At 400 °C the anatase phase is formed, while at 500 °C the rutile phase begins to form. And overall, the crystallinity of TiO2 is higher than metal-doped TiO2. The UV-Vis Reflectance result showed that the bandgap energy of all doping materials (TiO2-M) decreased. The larger the metal ion radius of dopant, the larger the crystal size obtained and then the higher the bandgap obtained. The results of SEM-EDX showed that the morphology of TiO2 was spherical and regular, whereas the morphology of TiO2-M had a smoother surface due to the influence of metal doping. Photocatalytic activity of TiO2-M on Remazol Brilliant Blue R and Remazol Yellow FG was greater than TiO2. The optimum pH of the solution was obtained at pH 5 and the optimum catalyst phase was obtained at the anatase phase. The percentages degradation for 30 min of Remazol Brilliant Blue R were 67.34% (TiO2), 92.12% (TiO2-Co), 85.47% (TiO2-Mn), and 83.91% (TiO2-Cd), while for Remazol Yellow FG they were 58.84% (TiO2), 74.61% (TiO2-Co), 67.93% (TiO2-Mn) and 64.19% (TiO2-Cd), respectively. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

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“…The MFA-NIC powder preparation was done by grinding what was previously reported by Fabian et al [23]. The cocrystal characterization was assessed by PXRD -a powerful tool in crystal structure alteration detection of solid material [26][27][28]. The PXRD profiles of MFA, NIC, physical mixture of MFA-NIC and its cocrystal were different from those of MFA and NIC.…”

Section: Mfa-nic Cocrystal Preparationmentioning

confidence: 99%

The crystal packing and slip plane analysis in mechanical properties improvement of mefenamic acid by cocrystallization with nicotinamide coformer

Wahyudi

Utami

Setianto

2020

CST

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Mefenamic acid is an analgesic non-steroidal anti-inflammatory drug (NSAID) that is categorized as Biopharmaceutical Classification System (BCS) class II drug. Cocrystallization of mefenamic acid (MFA) with nicotinamide (NIC) has been reported to enhance the solubility of MFA for about 2.56 times higher than pure MFA. As a part of MFA-NIC development in pharmaceutical dosage form, we reported the improvement of mechanical properties of MFA-NIC cocrystal based on the presence of slip planes in crystal structure. The research was initially by synthesizing and characterizing the cocrystal by using X-ray diffraction analysis, and was followed by the investigation of the mechanical properties of MFA and its cocrystal, i.e. tensile strength and deformation parameter. The correlation of crystal structure with mechanical properties was determined by crystal packing motif and slip plane analysis from single crystal data by using Mercury 3.6. The tensile strength of MFA was acceptance at 20.0 MPa, and dropped at more than 25.0 MPa. A better tableting performance was observed in MFA-NIC cocrystal which had the tensile strength 1.5 times higher than MFA at 12.5 MPa and gradually increased with an increasing pressure up to 2.5 times at 22.5 MPa. The flat slip plane of MFA-NIC cocrystal was predicted as the key factor in the improvement of its mechanical properties, compared to zigzag slip plane of MFA. In conclusion, MFA-NIC cocrystal had the better mechanical properties than pure MFA due to its flat slip plane and it becomes potential to be explored in further development of solid dosage form.

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Silylated-montmorillonite as co-adsorbent of chitosan composites for methylene blue dye removal in aqueous solution

Cited by 13 publications

References 45 publications

Volume change in compacted claystone-bentonite mixtures as affected by the swamp acidic water

Volume change in compacted claystone-bentonite mixtures as affected by the swamp acidic water

Photocatalytic Degradation of Remazol Brilliant Blue R and Remazol Yellow FG using TiO2 doped Cd, Co, Mn

The crystal packing and slip plane analysis in mechanical properties improvement of mefenamic acid by cocrystallization with nicotinamide coformer

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