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All Journal JURNAL KIMIA SAINS DAN APLIKASI Jurnal Sains Materi Indonesia Jurnal Matematika & Sains Omni-Akuatika Indonesian Journal of Chemistry

Suryo Gandasasmita

Department of Chemistry, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung

Author-ID : 5301243

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering Environmental Science Materials Science & Nanotechnology Mathematics

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Articles

The Comparison of the Material Properties of Reverse Osmosis Membranes with Respect to Their Performances Suryo Gandasasmita
Jurnal Matematika & Sains Vol 3, No 2 (1998)
Publisher : Institut Teknologi Bandung

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Reverse osmosis has been used for water desalination. The performance of a reverse osmosis membranes is very much determined by both the natural properties of polymeric membrane materials, as well as the properties created through the manufacturing process. The purpose of this research is to study the influence of membrane material properties on the membrane performance in relation to its flux and solute rejection in reverse osmosis process. In this study, three membranes were prepared for reverse osmosis application, namely polysulfon membrane (PSf) and cellulose acetate membranes (CA27 and CA05). The CA05 membrane had the best performance among the three membranes, with reasonable flux and moderate rejection. Upon the examination of the three membranes, the differences of the membrane material properties became clear. Each property works in synergy to optimize membrane performance.

HEAVY METALS (Ni, Cu, Zn AND Cd) CONTENT IN SERUM OF RAT FED GREEN MUSSELS Muhammad Yudhistira Azis; Suryo Gandasasmita; Agung Dhamar Syakti
Journal Omni-Akuatika Vol 11, No 2 (2015): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Green mussel (Perna viridis) can playing role as bio-indicator or biomonitoring agent for heavy-metalcontaminations in the sea. In this research, the concentrations of four elements Ni, Cu, Zn and Cd in P. viridis and in the serum of rat which orally feed by P. viridis were determined by Atomic Absorption Spectrometry (AAS) following dry acid digestion. Parameter analysis was evaluated by determining confidence limit for the obtained results. The result showed that there was a sequence of heavy-metal content in green mussels sample and laboratory rats serum, such as Ni < Cd < Cu < Zn.Keywords: heavy metals, green mussels, laboratory rats serum, AAS

SINTESIS DAN KARAKTERISASI POLIPIROL PADA ELEKTRODA KERJA KASA BAJA DENGANMETODE VOLTAMETRI SIKLIK Anceu Murniati; Buchari Buchari; Suryo Gandasasmita; Zeily Nurachman
Jurnal Sains Materi Indonesia Vol 13, No 3: JUNI 2012
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

SINTESIS DAN KARAKTERISASI POLIPIROL PADA ELEKTRODA KERJA KASA BAJA DENGANMETODE VOLTAMETRI SIKLIK. Telah dilakukan penelitian pelapisan polipirol pada elektroda kerja kasa baja denganmetode elektropolimerisasi pirol secara voltametri siklik.Tujuan penelitian inimerupakan studi awal mempelajari karakter kasa baja yang berpotensi sebagai elektroda kerja tempat elektrodeposisi film polipirol (PPy) berdasarkan literatur. Berdasarkan voltamogram siklik PPy, potensial oksidasi PPy dicapai pada rentang potensial 0V hingga 1V dibandingkan terhadap elektroda pembandingAg/AgCl pada arus puncak anodik (Ipa) mendekati 7 mA, dengan laju pindai 100 mV/detik dari larutan pirol 0,05 M dalam pelarut KCl 0,1M sebagai elektrolit pendukung. Pada rentang potensial tersebut selama proses elektropolimerisasi, selain dicapai potensial anodik PPy, terjadi persaingan dengan munculnya potensial anodik dari komponen utama kasa baja yaitu Fe, Zn, Cr atau Mn. Komponen utama yang terdapat dalam kasa baja telah dianalisis dengan X-Ray Fluorescence (XRF). Pelapisan PPy mampu menutupi permukaan kasa baja dengan pertumbuhan polimer sebanyak 10 siklus pada permukaan elektroda dengan mempelajari koefisien korelasi peningkatan arus anodik R = 0,999 dan peningkatan arus katodik R =0,991 terhadap bertambahnya jumlah siklus pada rentang potensial 0,2V hingga 0,8V. Hasil pelapisan film PPy yang menutupi permukaan kasa baja telah dikarakterisasi dengan Fourier Transform Infra Red (FT-IR).

ELECTROCHEMICAL SYNTHEZIS AND CHARACTERIZATION OF POLYPYRROLE FOR DODECYLSULFATE SENSOR MEMBRANE Abdul Haris Watoni; Suryo Gandasasmita; Indra Noviandri; Buchari Buchari
Indonesian Journal of Chemistry Vol 7, No 3 (2007)
Publisher : Universitas Gadjah Mada

A conducting polymer, polypyrrole, has been electrochemically synthesized from pyrrole monomer using cyclic voltammetry technique in aqueous solution in the presence of HDS dopant and KNO3 supporting electrolyte. The polymer was deposited on the surface of an Au-wire and the modified electrode obtained was then used as dodecylsulfate (DS-) ion sensor electrode. The best performance PPy-DS modified-Au electrode conditioned in the air system without HDS or SDS solution gave linear potential response for the concentration range of 1.0 x 10-5 - 1.0 x 10-3 M, sensitivity of 54.5 mV/decade, detection limit of 1.0 x 10-5 M, and response time of 23 - 30 second. The electrode showed good selectivity towards other anions, therefore can be used to determine SDS concentration in real samples system without any change of the samples matrix.

STUDY OF LYSINE AND ALANINE DELIVERANCE THROUGH POLYPYRROLE MEMBRANE Adhitasari Suratman; Buchari Buchari; Indra Noviandri; Suryo Gandasasmita
Indonesian Journal of Chemistry Vol 4, No 3 (2004)
Publisher : Universitas Gadjah Mada

Electropolymerization processes of pyrrole and the usage of polypyrrole membrane as lysine and alanine deliverance have been studied by cyclic voltammetry technique. Polypyrrole membrane was prepared by electropolymerization processes of pyrrole in water based solvent containing sodium perchlorate as supporting electrolyte. Electropolymerization processes were carried out within potential range of 0-1100 mV vs Ag/AgCl reference electrode and at the scanning rate of 100 mV/s. In this study, lysine and alanine have been used as molecules which could easily be loaded on and released from polypyrrole membrane. The presence of lysine or alanine during electropolymerization process reduced the rate of electropolymerization of polypyrrole. In lysine or alanine transfer processes into polypyrrole membrane, the interaction between polypyrrole and lysine or alanine showed by the curve of E½ oxidation in respect of - log C. It proved that the E½ oxidation shifted to more positive potential showed by the increasing of concentration of lysine or alanine. Beside that, voltammetric responses of lysine and alanine transfered into polypyrrole membrane were found to be Nernstian. The results indicated that polypyrrole could be used as a sensor of lysine and alanine.

STUDY OF ELECTROPOLIMERIZATION PROCESSES OF PYRROLE BY CYCLIC VOLTAMMETRIC TECHNIQUE Adhitasari Suratman; Buchari Buchari; Indra Noviandri; Suryo Gandasasmita
Indonesian Journal of Chemistry Vol 4, No 2 (2004)
Publisher : Universitas Gadjah Mada

Electropolymerization processes and electrochemical properties of polypyrrole as electroactive polymer have been studied by cyclic voltammetric technique. Pyrrole was electropolymerized to form polypyrrole in water-based solvent containing sodium perchlorate as supporting electrolyte in several pH values. The pH of the solutions were varied by using Britton Robinson buffer. The results showed that oxidation potential limit of electropolymerization processes of pyrrole was 1220 mV vs Ag/AgCl reference electrode. It can be seen that cyclic voltammetric respon of polypyrrole membrane that was prepared by electropolymerization processes of pyrrole at the scanning rate of 100 mV/s was stable. While the processes of pyrrole electropolymerization carried out at the variation of pH showed that the best condition was at the pH range of 2 - 6.

Immobilization of Crude Polyphenol Oxidase Extracts from Apples on Polypyrrole as a Membrane for Phenol Removal Anceu Murniati; Buchari Buchari; Suryo Gandasasmita; Zeily Nurachman; Arie Hardian; Dera Triani
Jurnal Kimia Sains dan Aplikasi Vol 24, No 2 (2021): Volume 24 Issue 2 Year 2021
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

This research aims to make a polypyrrole (PPy) membrane and crude extract of polyphenol oxidase (PPO) as a membrane of mPPy/PPO apple extracts. The membrane of PPy/PPO-apple extract has been synthesized by the electrodeposition method. The electrolyte composition consists of a mixture of 0.10-0.20 M pyrrole (Py) and 50-100% PPO apple extract, which is stable using 50 mM of phosphate buffer solution at pH 6.80-7.00 and room temperature. The electrodeposition process is used 400 mesh steel gauze anode ST-304 and carbon plate cathode. Electrodeposition is carried out at potential = 5.00-6.00 V; current = 0.02-0.25 A; the distance from both electrodes = 1.00-2.00 cm for 300-500 seconds. The results from the deposition of PPy/PPO apple extract of the anode are a membrane of mPPy/PPO-apple extract, with total enzyme activity (U) = (957,1441, 2287 and 1754) using 2.00-5.00 mM phenol as a substrate which is measured based on the UV-visible spectrophotometric method. PPy and mPPy/PPO-apple extracts were characterized by SEM and SEM-EDS. The membrane of mPPy/PPO-apple extract can be used to remove phenol in industrial wastewater samples is 50-65% with a filtration capacity of 500 mL for 2 hours.

Co-Authors Abdul Haris Watoni Adhitasari Suratman Agung Dhamar Syakti Anceu Murniati Anceu Murniati Arie Hardian Buchari Buchari Buchari Buchari Buchari Buchari Buchari Buchari Buchari Buchari Dera Triani Indra Noviandri Indra Noviandri Indra Noviandri Muhammad Yudhistira Azis ZEILY NURACHMAN Zeily Nurachman

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