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Size Selectivity of Anionic and Cationic Dyes Using LDH Modified Adsorbent with Low-Cost Rambutan Peel to Hydrochar Normah Normah; Novie Juleanti; Patimah Mega Syah Bahar Nur Siregar; Alfan Wijaya; Neza Rahayu Palapa; Tarmizi Taher; Aldes Lesbani
Bulletin of Chemical Reaction Engineering & Catalysis 2021: BCREC Volume 16 Issue 4 Year 2021 (December 2021)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.16.4.12093.869-880

Modification of the layered double hydroxide of CuAl-LDHs by composite with hydrochar (HC) to form CuAl-HC LDH. Material characterization by XRD, FT-IR and SEM analysis was used to prove the success of the modification. The characterization of XRD and FT-IR spectra showed similarities to pure LDH and HC. Selectivity experiments were carried out by mixing malachite green, methylene blue, rhodamine-B, methyl orange, and methyl red to produce the most suitable methyl blue dye for CuAl-LDH, HC and CuAl-HC adsorbents. The effectiveness of CuAl-HC LDH as adsorbent on methylene blue adsorption was tested through several influences such as adsorption isotherm, thermodynamics, and adsorbent regeneration. CuAl-HC LDH adsorption isotherm data shows that the adsorption process tends to follow the Langmuir isotherm model with a maximum adsorption capacity of 175.439 mg/g with a threefold increase compared to pure LDH. The effectiveness of the adsorbent for repeated use reaches five cycles as evidenced by the maximum capacity regeneration data reaching 82.2%, 79.3%, 77.9%, 76.1%, and 75.8%. 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).

Unique Adsorption Properties of Malachite Green on Interlayer Space of Cu-Al and Cu-Al-SiW12O40 Layered Double Hydroxides Neza Rahayu Palapa; Novie Juleanti; Normah Normah; Tarmizi Taher; Aldes Lesbani
Bulletin of Chemical Reaction Engineering & Catalysis 2020: BCREC Volume 15 Issue 3 Year 2020 (December 2020)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.15.3.8371.653-661

Cu-Al layered double hydroxide (LDH) was intercalated with Keggin ion of polyoxometalate K4[a-SiW12O40] to form Cu-Al-SiW12O40 LDH. The obtained materials were analyzed by X-ray Diffraction (XRD), Fourier Transform Infra Red (FTIR) spectroscopy, and Brunaur-Emmett-Teller (BET) surface area analysis. Furthermore, the materials were used as adsorbents of malachite green from aqueous solution. Some variables for adsorption, such as: effect of adsorption times, malachite green concentration, and also adsorption temperature, were explored. The results showed that diffraction at 11.72° on Cu-Al LDH has interlayer distance of 7.56 Å. The intercalation of that LDH with [a-SiW12O40]4− ion resulted increasing interlayer distance to 12.10 Å. The surface area of material was also increased after intercalation from 46.2 m2/g to 89.02 m2/g. The adsorption of malachite green on Cu-Al and Cu-Al-SiW12O40 LDHs followed pseudo second order kinetic and isotherm Langmuir model with adsorption capacity of Cu-Al and Cu-Al-SiW12O40 LDHs was 55.866 mg/g and 149.253 mg/g, respectively. That adsorption capacity is equal with increasing interlayer space and surface area properties of material after intercalation. Thus, the adsorption of malachite green on Cu-Al and Cu-Al-SiW12O40 LDHs is unique and dominantly occurred on interlayer space of LDH as active site adsorption. 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).

NiAl Layered Double Hydroxide/Rice Husk Composite for the Efficient Removal of Malachite Green Neza Rahayu Palapa; Tarmizi Taher; Normah Normah; Aldes Lesbani
Indonesian Journal of Chemistry Vol 22, No 1 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.68021

Rice husk biochar (BC) loaded NiAl layered double hydroxide (LDH) has been synthesized to form NiAl LDH/BC composite through a co-precipitation method. NiAl LDH/BC has been used as an adsorbent to remove malachite green from water efficiently. The specific surface area analysis revealed that the surface area of NiAl LDH/BC composite increased five times, from 92.6 to 438.9 m2/g, compared to the original NiAl LDH. The adsorption studies revealed that NiAl LDH/BC composite followed the pseudo-second-order kinetic adsorption model while the isotherm followed the Langmuir monolayer adsorption model. The maximum adsorption capacity of NiAl LDH/BC composite prepared with a ratio of 1:1 and 1:0.5 achieved 185.1 mg/g and 142.9 mg/g, respectively, which is twice higher than the pristine ones (NiAl LDH). The thermodynamic parameters, determined at 303, 313, 323, and 333 K, revealed that the adsorption process was spontaneous and endothermic. The NiAl LDH/BC composite was tested for three consecutive adsorption-desorption cycles to investigate its reusability performance. It is found that their adsorption performance slightly decreased to 71.8% and 68.3% for NiAl LDH/BC composite 1:0.5 and 1:1, respectively. Therefore, it could be considered that the synthesized NiAl LDH/BC exhibited a good and efficient adsorbent for malachite greed removal.

Comparison of the Adsorption Ability of MgAl-HC, CaAl-HC, and ZaAl-HC Composite Materials Based on Duku Peel Hydrochar in Adsorption of Direct Green Anionic Dyes Novie Juleanti; Normah Normah; Patimah Mega Syah Bahar Nur Siregar; Alfan Wijaya; Neza Rahayu Palapa; Tamizi Taher; Nurlisa Hidayati; Risfidian Mohadi; Aldes Lesbani
Indonesian Journal of Chemistry Vol 22, No 1 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.68719

Preparation of composite material from layered double hydroxide (LDH) with hydrochar (HC) from duku peel produces CaAl-HC, MgAl-HC, and ZnAl-HC have shown the success of the preparation process as evidenced by characterizations such as XRD and FT-IR. The XRD characterization data evidenced the typical diffraction of the hydrochar around 2θ = 20° in the composite material. FTIR analysis is a characterization that supports the success of composite materials, which showed the presence of typical vibrations of HC at 3245, 2931, and 1635 cm–1 contained in the composite spectrum. The application of MgAl-HC, CaAl-HC, and ZnAl-HC composites as adsorbents showed Qmax (adsorption ability) values of 94.340 mg/g, 128.205 mg/g, and 89.286 mg/g. Overall the adsorption process is endothermic with a positive enthalpy value, and a negative Gibbs free energy value indicates a spontaneous adsorption process. The isotherm model of MgAl-HC, CaAl-HC, and ZnAl-HC show that the Langmuir isotherm model is more dominant, as indicated by the R2 value closer to 1 which indicates that the adsorption process takes place in a monolayer.

Low-Cost Yet High-Performance Hydrochar Derived from Hydrothermal Carbonization of Duku Peel (Lansium domesticum) for Cr(VI) Removal from Aqueous Solution Risfidian Mohadi; Novie Juleanti; Normah Normah; Patimah Mega Syah Bahar Nur Siregar; Alfan Wijaya; Neza Rahayu Palapa; Aldes Lesbani
Indonesian Journal of Chemistry Vol 22, No 6 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.73353

Carbon-based adsorbent as a hydrochar (Hc) material with Duku (Lansium domesticum) peel precursors has been successfully synthesized as evidenced by XRD, FT-IR, BET, and SEM analysis. XRD analysis showed the presence of diffraction peaks around 16° and 22° which indicated the presence of carbonaceous material. This is confirmed by FTIR analysis which shows the presence of vibration at 2931 cm−1 of cellulose. SEM data results showed that heterogeneous and has an irregular shape and surface area increased twice from Duku peel to Hc. Duku peel and Hc adsorbent materials were applied to adsorb heavy metal ions Cr(VI). Kinetic parameters of Cr(VI) using Duku peel and Hc showed that the optimum time reached was at 120 min. The adsorption kinetics model of Cr(VI) using Hc tends to follow the PFO model and Langmuir isotherm adsorption. Duku peel material used to adsorb Cr(VI) reached an adsorption capacity of 42.19 mg/g, while in Hc material there was an increase that reached 80.64 mg/g. The thermodynamic parameters of both materials show that the adsorption process is spontaneous.

The Ability of Composite Ni/Al-carbon based Material Toward Readsorption of Iron(II) in Aqueous Solution Normah Normah; Neza Rahayu Palapa; Tarmizi Taher; Risfidian Mohadi; Hasja Paluta Utami; Aldes Lesbani
Science and Technology Indonesia Vol. 6 No. 3 (2021): July
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

In this research, NiAl-LDH was synthesized using the coprecipitation method and modified with biochar and graphite to produce NiAlbiochar and NiAl-graphite composite materials. The adsorbent that has been synthesized is used for the application of adsorption of Fe(II) ions in aqueous solution. The resulting material was characterized by XRD (X-ray Diffraction) analysis, spectrophotometer FT-IR, BET analysis for determine the specific surface area and TG-DTA analysis. XRD diffractogram showed that the NiAl-Biochar and NiAl-graphite composite material had the diffraction pattern characteristic of the precursor. LDH that has been modified will have a larger surface area than the precursor. The surface area of NiAl-biochar reaches 438.942 m2/g and the surface area of NiAl-graphitereaches 21.595 m2/g. This composite material supports adsorbents with a large adsorption capacity to adsorb metals. Adsorption of Fe (II) using NiAl-Biochar and NiAl-graphite was stable for five regeneration cycles (<75.30%). The Fe(II) ion adsorption process tends to follow the Langmuir isotherm model which has a maximum capacity value (Qmax) of NiAl-Biochar composite material reaching 20 times with a value of 243.902 mg/g and the NiAl-graphite composite reaching 72.464 mg/g, so that the carbon-based composite material is considered effective. adsorbent to remove Fe(II) ion and can increase the stability of the structure for adsorption regeneration. The results of the analysis of thermodynamic parameters showed that the adsorption process was endothermic, tookplace spontaneously and the solid-liquid phase interface increased according to the increasing degree of disorder.

Unique Adsorption Properties of Cationic Dyes Malachite Green and Rhodamine-B on Longan (Dimocarpus longan) Peel Risfidian Mohadi; Normah; Erni Salasia Fitri; Neza Rahayu Palapa
Science and Technology Indonesia Vol. 7 No. 1 (2022): January
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

This research converts agricultural waste Longan (Dimocarpus longan) Peel is used in the adsorption process to reduce cationic dyes rhodamine-B and malachite green contaminants from aqueous solution. Longan (Dimocarpus longan) Peel was characterized by FT-IR, analysis XRD, SEM, BET, and TG-DTA. The characterization results show that Longan (Dimocarpus longan) Peel contains cellulose compounds and has a specific surface area 17.175 m2/g, with this Longan (Dimocarpus longan) Peel has the potential as a bio adsorbent. The adsorption capacity is proven by adsorption capacity (Qm) shows that the bioadsorbent adsorption of malachite green has a large adsorption capacity of 182.64 mg/g, while the adsorption capacity of rhodamine-B (Qm) reaches 52.557 mg/g and this bioadsorbent longan (Dimocarpus longan) peel is effective the adsorption was stable until the third cycle.

Unique Adsorption Properties of Malachite Green on Interlayer Space of Cu-Al and Cu-Al-SiW12O40 Layered Double Hydroxides Neza Rahayu Palapa; Novie Juleanti; Normah Normah; Tarmizi Taher; Aldes Lesbani
Bulletin of Chemical Reaction Engineering & Catalysis 2020: BCREC Volume 15 Issue 3 Year 2020 (December 2020)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.15.3.8371.653-661

Cu-Al layered double hydroxide (LDH) was intercalated with Keggin ion of polyoxometalate K4[a-SiW12O40] to form Cu-Al-SiW12O40 LDH. The obtained materials were analyzed by X-ray Diffraction (XRD), Fourier Transform Infra Red (FTIR) spectroscopy, and Brunaur-Emmett-Teller (BET) surface area analysis. Furthermore, the materials were used as adsorbents of malachite green from aqueous solution. Some variables for adsorption, such as: effect of adsorption times, malachite green concentration, and also adsorption temperature, were explored. The results showed that diffraction at 11.72° on Cu-Al LDH has interlayer distance of 7.56 Å. The intercalation of that LDH with [a-SiW12O40]4− ion resulted increasing interlayer distance to 12.10 Å. The surface area of material was also increased after intercalation from 46.2 m2/g to 89.02 m2/g. The adsorption of malachite green on Cu-Al and Cu-Al-SiW12O40 LDHs followed pseudo second order kinetic and isotherm Langmuir model with adsorption capacity of Cu-Al and Cu-Al-SiW12O40 LDHs was 55.866 mg/g and 149.253 mg/g, respectively. That adsorption capacity is equal with increasing interlayer space and surface area properties of material after intercalation. Thus, the adsorption of malachite green on Cu-Al and Cu-Al-SiW12O40 LDHs is unique and dominantly occurred on interlayer space of LDH as active site adsorption. 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).

Size Selectivity of Anionic and Cationic Dyes Using LDH Modified Adsorbent with Low-Cost Rambutan Peel to Hydrochar Normah Normah; Novie Juleanti; Patimah Mega Syah Bahar Nur Siregar; Alfan Wijaya; Neza Rahayu Palapa; Tarmizi Taher; Aldes Lesbani
Bulletin of Chemical Reaction Engineering & Catalysis 2021: BCREC Volume 16 Issue 4 Year 2021 (December 2021)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.16.4.12093.869-880

Modification of the layered double hydroxide of CuAl-LDHs by composite with hydrochar (HC) to form CuAl-HC LDH. Material characterization by XRD, FT-IR and SEM analysis was used to prove the success of the modification. The characterization of XRD and FT-IR spectra showed similarities to pure LDH and HC. Selectivity experiments were carried out by mixing malachite green, methylene blue, rhodamine-B, methyl orange, and methyl red to produce the most suitable methyl blue dye for CuAl-LDH, HC and CuAl-HC adsorbents. The effectiveness of CuAl-HC LDH as adsorbent on methylene blue adsorption was tested through several influences such as adsorption isotherm, thermodynamics, and adsorbent regeneration. CuAl-HC LDH adsorption isotherm data shows that the adsorption process tends to follow the Langmuir isotherm model with a maximum adsorption capacity of 175.439 mg/g with a threefold increase compared to pure LDH. The effectiveness of the adsorbent for repeated use reaches five cycles as evidenced by the maximum capacity regeneration data reaching 82.2%, 79.3%, 77.9%, 76.1%, and 75.8%. 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).

Layered Double Hydroxide Zn/M3+ (M3+= Al and Cr) as Highly Efficient Adsorbent of Heavy Metal Pb(II) Zaqiya Artha Zahara; Luna Silaen; Normah Normah; Novie Juleanti; Neza Rahayu Palapa
Indonesian Journal of Material Research Vol. 1 No. 1 (2023): March
Publisher : Magister Program of Material Science Graduate School of Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/ijmr.2023114

Synthesis of Zn-Al and Zn-Cr LDHs in this research was successfully carried out. The sucsessfully results can be seen from the XRD characterization which displays diffraction angles at 10 and 60 which indicates the presence of layered structures and anions. FT-IR data displays the presence of nitrate groups at wavenumber 1381 cm−1. BET data shows surface area of Zn-Al and Zn-Cr at 1.965, 31.638 m2/g, corresponding. pHpzc determination of Zn-Al material gets a pH below pHpzc which is 6.2 while Zn-Cr is at pHpzc which is 7.6. Able of Zn (Al/Cr) as adsorbent to adsorp Pb(II) was investigated through several parameters such as kinetics, isotherms, thermodynamics. Kinetic Adsorption for Zn-Al inclined follow PSO, while Zn-Cr follow PFO. Isotherm parameter for Zn-Al and Zn-Cr is Freundlich with a maximum adsorption capacity 74.127 mg/L, and 27.027 mg/L. Thermodynamic process shows that Zn-Al and Zn-Cr LDHs take place in endothermic and spontaneously.

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