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All Journal JURNAL KIMIA SAINS DAN APLIKASI Jurnal Sains Dasar Indonesian Journal of Chemistry Greensphere: Journal of Environmental Chemistry
Choiril Azmiyawati
Chemistry Department, Faculty Of Sciences And Mathematics, Diponegoro University, Jl. Prof. Soedarto, SH., Tembalang, Semarang|Diponegoro University|Indonesia
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Engineering

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Journal : Indonesian Journal of Chemistry

 1 
ADSORPTION OF Mg(II) AND Ca(II) ON DISULFONATO-SILICA HYBRID Choiril Azmiyawati; Nuryono Nuryono; Narsito Narsito
Indonesian Journal of Chemistry Vol 12, No 3 (2012)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (438.099 KB) | DOI: 10.22146/ijc.21334

Abstract

Adsorption of Mg(II) and Ca(II) on disulfonato-silica hybrid (DSSH) in the aqueous solution has been studied. The hybrid was synthesized by sol-gel process with sodium silicate solution from rice hull ash, chloroprophyltrimethoxysilane (CTS) and 4-amino-5-hydroxy-naphtalene-2,7-disulfonic acid monosodium salt (ANSNa) as silica source, cross linker and active group, respectively. Sodium silicate solution was reacted with CTS and ANSNa that were added dropwise. Adsorption of magnesium and calcium ions on DSSH was carried out in a batch system. Solution pH significantly affected magnesium and calcium adsorption and the optimum condition was obtained at pH = 6. The synthesized DSSH showed a high adsorption capacity of 0.0844 mmol/g and 0.1442 mmol/g for Mg(II) and Ca(II), respectively. The adsorption isotherm obtained with Langmuir isotherm model gives the negative values of ΔG°, i.e. -23.334 kJ/mol and -22.757 kJ/mol for Mg(II) and Ca(II), respectively, indicating the spontaneous process of adsorption. Kinetic studies showed that the adsorption of Mg(II) and Ca(II) ions onto HDSS follows the pseudo-second-order kinetics.
THERMODYNAMIC OF Mg(II), Cd(II), AND Ni(II) ADSORPTION ON SULFONIC MODIFIED SILICA GEL Choiril Azmiyawati; Nuryono Nuryono; Narsito Narsito
Indonesian Journal of Chemistry Vol 5, No 1 (2005)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (208.036 KB) | DOI: 10.22146/ijc.21835

Abstract

Silica gel modified with 4-amino-5-hydroxy-2,7-naphtalenedisulphonate (SG-SO3-) has been applied for adsorption of Mg(II), Cd(II), and Ni(II) in aqueous medium. In addition, three thermodynamic parameters i.e. capacity, adsorption constant and energy of adsorption were calculated. Adsorption was conducted in a batch system and metal ion remaining in the solution was determined by atomic adsorption spectrophotometry (AAS). The amount of adsorbed metal ions was calculated from the difference of metal ion concentration before and after interaction. Adsorption parameters i.e. capacity (ns2), constant (b), and energy (E) of adsorption were calculated using the equation of Langmuir isotherm. Results showed that ns2 for Mg(II), Cd(II), and Ni(II) on the adsorbent were 4.67 x 10-4, 1.19 x 10-4, and 0.13 x 10-4mol g-1, respectively. The values of b for Mg(II), Cd(II), and Ni(II) were 49.35 x 105, 173.46 x 105, and 181.12 x 105 g-1, respectively. Furthermore, it was found that E for all metal ion investigated was in the range of 26-30 kJ/mol, indicating the involvement of chemical adsorption.  
The Effect of Temperature, Sulfonation, and PEG Addition on Physicochemical Characteristics of PVDF Membranes and Its Application on Hemodialysis Membrane Retno Ariadi Lusiana; Ayub Indra; Nor Basid Adiwibawa Prasetya; Nurwarrohman Andre Sasongko; Parsaoran Siahaan; Choiril Azmiyawati; Nanik Wijayanti; Anugrah Ricky Wijaya; Mohd Hafiz Dzarfan Othman
Indonesian Journal of Chemistry Vol 21, No 4 (2021)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.63740

Abstract

Polyvinylidene fluoride (PVDF) membrane and its derivative have been investigated the permeation ability for creatinine and urea. The membrane was made by an inversion precipitation system in N,N-dimethyl acetamide (DMAc) and water as non-solvents. In this study, the modification of PVDF membrane permeability with PEG additives, CBT variations, and sulfonation was successfully carried out. The membrane solidification process was carried out on three variations of the coagulation bath temperature (CBT): 30, 45, and 60 °C. Eight types of membranes were characterized by using FT-IR and TGA/DSC, followed by the analysis of their porosity, hydrophilicity, water uptake, swelling degree, tensile strength, and permeability of creatinine and urea. The FT-IR spectra indicate that PVDF modification has been successfully carried out. The porosity, hydrophilicity, water uptake, and swelling degree values increase with the modification of functional groups. Furthermore, improvements in creatinine and urea permeability and clearances are achieved by increasing CBT and sulfonation in the PVDF/PEG membrane. The presence of sulfonate groups improves the membrane permeability through the interaction of intermolecular hydrogen with water and dialysate compounds. The existence of PEG as a porogen enhanced membrane porosity. Creatinine and urea clearance values increase from 0.29–0.58 and 6.38–20.63 mg/dL, respectively.
Co-Authors Adi Darmawan Ali Djamhuri Anugrah Ricky Wijaya Artha Monica Andini Ayub Indra D. Widodo Damar Nurwahyu Bima Dini Hayati Endang Sawitri Endang Sawitri Erna Kurnia Sari Isharyanti, Isharyanti Janitra, Atikah Ayu Khairini Pertiwi L Suyati Lia Puspita Dewi Maranti Sianita Mohd Hafiz Dzarfan Othman Mukhammad Asy'ari Nanik Wijayanti Narsito Narsito Narsito Narsito Nor Aida Zubir Nor Basid Adiwibawa Prasetya Nurwarrohman Andre Sasongko Nuryono Nuryono Nuryono Nuryono P Siahaan Pardoyo Pardoyo Parsaoran Siahaan Priatmoko Priatmoko Pulojuliadi Nababan R. Nuryanto R.A. Novitasari Ratna Kusumawardani Retno Ariadi Lusiana Retno Dwi Soelistyowati Sriatun Sriatun Suhartana Suhartana Taslimah Taslimah Taslimah Taslimah W.H. Rahmanto