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All Journal JURNAL PHOTON Indonesian Journal of Chemical Analysis (IJCA) Fullerene Journal of Chemistry Analit: Analytical And Environmental Chemistry
Mukhlis .
University of Riau
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Environmental Science Nursing Physics

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Evaluasi Kemampuan HCl dan H2SO4 Sebagai Aktivator Adsorben Bubuk Kulit Batang Sagu (Metroxylon Sagu) Mukhlis .; Itnawita .; Ayu Chandra Kartika; Fika Filia Cani
Sistem Informasi Vol 11 No 2 (2021): Jurnal Photon
Publisher : LPPM Universitas Muhammadiyah Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jp.v11i2.2521

Abstract

Sago stem bark powder (Metroxylon sago) has the potential as an adsorbent because it contains cellulose, hemicellulose, and lignin. This study`s purpose was to determine the ability of the chemical activator in the hydrochloric acid and sulfuric acid to improve the adsorbent quality of sago stem bark powder according to SNI 06-3730-1995 standards. The method used is the bath system, where the sago stem bark powder is activated by soaking with HCl and H2SO4 for 24 hours using a variation of the adsorbent ratio and activator weight 1: 1, 1: 2, and 1: 3. The analysis was tested through characterization including moisture content, ash content, iodine absorption, and methylene blue absorption, as well as functional groups. From the research results, it was found that the two activators showed an optimal ratio of 1: 2 to provide optimal conditions for moisture content, ash content, iodine and methylene blue adsorption, surface area each of 1.64%; 3.14%; 261.41 mg/g; 4.80 mg/g; 17.76 m2/g for HCl activator and 2.67%; 3.20%; 261.10 mg/g; 4.79 mg/g; 17.67 m2/g for H2SO4 activator. From it this study can be concluded that the use of HCl and H2SO4 solutions did not show a significant difference as an activator to improve the quality of the sago stem bark powder adsorbent, the absorption value of iodine and methylene blue both activators have not been able to make sago stem bark powder as an adsorbent according to SNI 06-3730-1995 standards.
Optimization of Contact Time and Stirring Speed in The Adsorption of Cd(II) Using Acacia crassicarpa Bark Powder as Adsorbent Mukhlis; Hidayah, Nurul; Hanifah, Abu; Itnawita; Anita, Sofia; Devi, Silvera; Tamboesai, Emrizal Mahidin
Indonesian Journal of Chemical Analysis (IJCA) Vol. 8 No. 2 (2025): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol8.iss2.art2

Abstract

Acacia crassicarpa bark powder showed potential as an adsorbent due to its high cellulose content of approximately 50%. This research aimed to determine the optimum contact time, stirring speed, and adsorption kinetic models of Acacia crassicarpa bark powder for Cd(II) removal. Adsorbent characterization was conducted using a Surface Area and Pore Size Analyzer, FTIR, and SEM-EDX, while batch adsorption experiments were conducted to evaluate performance. The adsorbent exhibited a specific surface area of 0.460 m²/g and pore diameters ranging from 32.707 to 45.426 Å, indicating mesoporous characteristics. FTIR analysis identified functional groups such as O–H, C=O, and O–Cd. SEM-EDX analysis before adsorption revealed a rough surface with open, irregular pores and dominant elements including C, N, and O. After adsorption, the surface appeared smoother, with pores filled by Cd(II), as confirmed by Cd peaks in the EDX spectrum. Optimum conditions were obtained at a contact time of 70 minutes and a stirring speed of 120 rpm, resulting in an adsorption efficiency of 96.93% and a 1.3613 mg/g capacity. The adsorption kinetics followed a pseudo-second-order model (R2 = 0.9985), indicating that the adsorption mechanism occurred via chemisorption.
ADSORPTION of METHYL ORANGE DYE USING POWDERED ACACIA (Crassicarpa) BARK AS AN ADSORBENT Mukhlis; Nafiah Pratiwi; Indriyana Syafitri Aswir; Itnawita; Sofia Anita; T. Abu Hanifah
Analit : Analytical and Environmental Chemistry Vol. 10, No. 02 October (2025) Analit : Analytical and Environmental Chemistry
Publisher : Jurusan Kimia FMIPA Universitas Lampung

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Abstract

ABSTRAK Serbuk kulit kayu Acacia crassicarpa adalah biomassa lignoselulosa yang kaya akan selulosa, diteliti sebagai biosorben untuk menghilangkan Metil Oranye (MO) dari larutan berair. Studi ini bertujuan untuk menentukan kondisi adsorpsi optimum, termasuk dosis adsorben, pH, waktu kontak, kecepatan pengadukan, konsentrasi adsorbat, dan suhu. Eksperimen adsorpsi dilakukan menggunakan sistem batch, dan adsorben dikarakterisasi menggunakan analisis FTIR, SEM-EDS, dan BET. Kondisi optimum diperoleh pada dosis 0,75 g, pH 2, waktu kontak 80 menit, kecepatan pengadukan 200 rpm, konsentrasi MO 20 ppm, dan suhu 30 °C, mencapai efisiensi adsorpsi sebesar 82,34% dan kapasitas sebesar 5,6492 mg/g. SEM-EDS menunjukkan morfologi berpori yang didominasi oleh unsur karbon dan oksigen. Analisis BET menunjukkan luas permukaan sebesar 0,460 m²/g, sedangkan FTIR mengkonfirmasi keberadaan gugus fungsional hidroksil, karbonil, dan aromatik yang terlibat dalam adsorpsi. Hasil ini membuktikan bahwa akasia dapat menjadi adsorben.     ABSTRACT Acacia crassicarpa bark powder, a lignocellulosic biomass rich in cellulose, was investigated as a biosorbent for the removal of Methyl Orange (MO) from aqueous solutions. This study aimed to determine the optimum adsorption conditions, including adsorbent dosage, pH, contact time, stirring speed, adsorbate concentration, and temperature. Adsorption experiments were conducted using a batch system, and the adsorbent was characterized using FTIR, SEM-EDS, and BET analyses. The optimum conditions were obtained at a dosage of 0.75 g, pH 2, contact time of 80 min, stirring speed of 200 rpm, MO concentration of 20 ppm, and temperature of 30 °C, achieving an adsorption efficiency of 82.34% and a capacity of 5.6492 mg/g. SEM-EDS showed a porous morphology dominated by carbon and oxygen elements. BET analysis showed a surface area of ​​0.460 m²/g, while FTIR confirmed the presence of hydroxyl, carbonyl, and aromatic functional groups involved in the adsorption. These results prove that acacia can be an adsorbent.  
Adsorption Of Rhodamine B Dye By Acacia Bark Powder (Acacia crassicarpa) Mukhlis .; Lathifa Azury; Sela Andesti; T. Abu Hanifah; Sofia Anita; Itnawita Itnawita
Jurnal Kimia Fullerene Vol 11 No 2: Fullerene Journal Of Chemistry
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37033/fjc.v11i2.742

Abstract

Acacia bark powder (Acacia crassicarpa) is a biomass containing cellulose compounds as active sites for adsorption. This study aims to optimise the adsorption parameters of Rhodamine B by acacia bark powder. The method used in this study is batch adsorption. The adsorbent is prepared in powder form with a particle size of 100–200 mesh. SEM-EDS characterisation results showed a porous surface morphology of the adsorbent, dominated by carbon (C) and oxygen (O) elements. BET analysis revealed a specific surface area of 0.460 m²/g, pore volume of 4.361×10⁻³ cc/g, and pore diameter of 379.008 Å. FTIR results indicated the presence of functional groups N-H, -OH, C-H, C=O, C=C, and C-O. Optimal adsorption conditions were obtained at an adsorbent dose of 0.5 g, pH 2, contact time of 50 minutes, stirring speed of 200 rpm, adsorbate concentration of 40 mg/L, and temperature of 50°C, with an adsorption efficiency of 99.04% and adsorption capacity of 3.9326 mg/g. The results of this study indicate that Acacia crassicarpa bark powder has good performance in adsorbing Rhodamine B dye.
Co-Authors Abu Hanifah Ayu Chandra Kartika Emrizal Mahidin Tamboesai Fika Filia Cani Indriyana Syafitri Aswir Itnawita Itnawita Itnawita Itnawita Itnawita Itnawita Lathifa Azury Nafiah Pratiwi NURUL HIDAYAH Sela Andesti Silvera Devi Sofia Anita Sofia Anita T. Abu Hanifah T. Abu Hanifah