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All Journal JURNAL KIMIA SAINS DAN APLIKASI Jurnal Natur Indonesia IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Indonesia Chimica Acta Panrita Abdi - Jurnal Pengabdian pada Masyarakat Indonesian Journal of Chemistry Chemistry Indonesian Journal of Chemical Research INTEK: Jurnal Penelitian Makara Journal of Science JURNAL REKAYASA KIMIA & LINGKUNGAN

Abdul Wahid Wahab

Chemistry DepartementFaculty of Mathematics and Natural Sciences Hasanuddin University Makassar 90245

Author-ID : 410484

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Energy Engineering Environmental Science Other

Published : 17 Documents Claim Missing Document

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Pengaruh Ion Kadmium(II) dan Nikel(II) pada Ekstraksi Ion Tembaga(II) dengan Ekstraktan 4-Benzoil -1-Fenil-3-Metil- 2- Pirazolin-5-On Menggunakan Emulsi Membran Cair Hamzah, Baharuddin; Jalaluddin, Noor; Wahab, Abdul Wahid; Upe, Ambo
Jurnal Natur Indonesia Vol 13, No 3 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

The effects of cadmium(II) and nickel(II) ions to copper(II) extraction using liquid membrane emulsion with 4-benzoyl-3-methyl-1-phenyl-2-pyrazolin-5-on (HPMBP) as an extractant was studied. The optimum condition forcopper(II) extraction were as follows: emulsification rate=2000 rpm, emulsification time=10 minutes, extractionrate=300 rpm, extraction time=15 minutes, concentration of mixed surfactant (span 80+span 20)=3%, volumeratio of membrane phase and internal phase=1:1, concentration of HPMBP=0.020 M, concentration of HCl=1M,volume ratio of emulsion and external phase=1:7. The result showed that the extraction of copper(II) by liquidmembrane emulsion with HPMBP as an extractant was selective to cadmium(II) and nickel(II) ions, relatively. Theresult also showed that in the extraction of 500 mg/l copper(II), the presence of 500 mg/l of nickel(II) was decreasingthe percentage of copper(II) extraction to be 83.73. While, the presence of 500 mg/l of cadmium(II) does notinfluence the percentage extraction of copper(II), relatively.

Synthesis and Structural Analysis of Magnesium Oxide Nanomaterial Using Ethanol as Polymerization Solvent I Wayan Sutapa; Abdul Wahid Wahab; Paulina Taba; Nursiah La Nafie
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 4, No 2 (2019): June 2019
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v4.i2.82

The purpose of the study was to synthesize MgO nanomaterials using sol-gel method with ethanol as solvent and to perform structural analysis of the products. Mg-oxalate was initially prepared prior magnesium acetate. Magnesium acetate dissolved in ethanol, and the oxalic acid added to adjust pH until gel phase formed. The gel was heated at 100 C for 24 hours to produce magnesium oxalate solids. Solids was sieved using ±150 mesh then annealed at 550 C for 6 hours to produce MgO nanomaterial. The magnesium oxalate was characterized using FT-IR, XRD, and SEM. FT-IR peak at 3408.22 cm-1; 1709.35 cm-1; 1375.39 cm-1; 830.32 cm-1; 420.48 cm-1, and the XRD peak 17.95o; 22.97o; 25.02o; 27,94o; 35.10o; 37,63o; 44.16o were characteristic of Mg-oxalate. Meanwhile, FT-IR band at 1030.24 cm-1; 2358.94 cm-1; 1627.92 cm-1; 1417.66 cm-1; 437.84 cm-1, and XRD peak at 38.92o; 43.3o; 56.02o; 62.64o; 74.88o and 79.04o shows characteristic of MgO nanomaterial. Structure analysis shown the MgO nanomaterials has an average crystal size 8.11 nm, and lattice length 21.21 nm. The values of strain, stress, energy density crystal and dislocation density of the MgO are 5.3 x 10-5 MPa, 32.97 MPa, 154.81 J/nm2, 1.52 x 10-3 nm-2 respectively. Morphologically the MgO nanomaterial produced is cubic.

Synthesis Of Silver Nanoparticles Using Beluntas Leaf (Pluchea Indica L.) Extract Fatimah Fatimah; Abdul Wahid Wahab; Abdul Karim
Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta) Volume 12, No.1: June 2019
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/ica.v12i1.5757

Synthesis of silver nanoparticles was carried out using environmentally Beluntas (Pluchea Indica L.) leaf extract to minimize the use of harmful chemicals. Synthesis was carried out with the ratio of AgNO3 solution and the beluntas leaf extract 90 mL : 1 mL. The process of forming silver nanoparticles was studied and monitored by observing the absorption spectrum using UV-Vis spectrophotometer. The observations showed the silver nanoparticles that was formed had SPR (Surface Plasmon Resonance) absorbance peak values at the wavelength of about 445,5 nm with an absorbance value of 3,437. The absorbance value increased with the increasing reaction time from 1 hour to 168 hours. From the result of testing using PSA, the average size of silver nanoparticles was 109.1 nm which is dispersed between 1,8 nm – 127,3 nm.

Synthesis And Characterization Of Gold Nanoparticles Using Beluntas Leaf Extract Plucheaindica Dewi Lidiawati; Abdul Wahid Wahab; Abdul Karim
Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta) Volume 12, No.1: June 2019
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/ica.v12i1.5822

Gold nanoparticles have been successfully synthesized using beluntas leaf extract as reducing agents. This is indicated by the change of the color from yellow gold to purple solution after the addition of the beluntas leaf extract. The gold nanoparticles formed were observed for 92 hours using uv-vis and obtained stability after 72 hours with a wavelength about 545.50-546.00 nm. The size distribution of gold nanoparticles was determined using Particle Size Analyzer (PSA) with an average distribution of 101.6 nm. Based on the characterization using XRD, the diffraction pattern obtained at 2θ is 38.1077; 44,2935; 64,5155; 77,4862 which show the presence of gold nanoparticles. Furthermore, it was characterized using SEM EDX showed that the average shape of gold nanoparticles was spherical with a composition ofAu 48%, C 43.33%, and several other elements around 8.67%.

Synthesis and Characterization Gold Nanoparticles Using Extracts of Sarang Semut (Myrmecodia pendans) For Sensing of Glucose Andi Suciati; Abdul Wahid Wahab; Paulina Taba
Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta) Volume 12, No.1: June 2019
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/ica.v12i1.5823

Abstract. Gold nanoparticles have been synthesized with simple and relatively safe method by using kaemferol and quercetin containing aqueous extract of Myrmecodia pendans (sarang semut plant). Under this method, it was able to obtain AuNPs and measured the size. The formation of the nanoparticles were identified by the color change (yellow to red) occurred in the chloroauric acid solution after additional aquoeos extract of sarang semut plant. The UV-Visible spectra and particle size analyzer indicated the successful formation of AuNPs with wavelength of 521.5 nm which was stable for 4 days, evidenced by the presence of particles with a size 53.2 nm. XRD analysis showed the difractogram peak of gold nanopartcle. The result of SEM analysis indicated gold nanopartcle surface with spherical and rod-like shapes. Glucose sensor utilized gold nanopartcle as catalyst with measurement range 2–5 mM and regresision 0,868, detection limit of sensor was in concentration 2-5 mM was 7,5 mM with sensitivity 0,736 A.mM-1.mm-2. Glucose concentration obtained in blood serum was 78,48mg/dL. Gold nanoparticles is promising to detect blood sugar with simply, securely, low cost without using enzyme and harmful material.

Synthesis and Characterization Of Silver Nanoparticles Using Water Extract of Sarang Semut (Myrmecodia pendans) For Blood Glucose Sensors Rosalinda Zeniona Maarebia; Abdul Wahid Wahab; Paulina Taba
Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta) Volume 12, No.1: June 2019
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/ica.v12i1.5881

The principles of green chemistry in nanotechnology is one of the key issues in nanoscience research. Biosynthesis of nanoparticles using plant extract is an eco- friendly approach which eliminates the need for using physical and chemical techniques. A green synthetic route for the production of stable silver nanoparticles (AgNPs) by using aqueous silver nitrate as metal precursor and Myrmecodia pendans extract as bioreductor and PVA as stabilizer is being reported for the first time. In this case, the synthesis of silver nanoparticles (AgNPs) was carried out by reduction method. The bio-reduction and stabilization of so formed silver nanoparticles was monitored by UV-Vis spectrophotometry. Maximum absorption of AgNPs using Polyvinyl Alcohol (PVA) was at wavelength 408.50 nm, whereas that of AgNPs without using PVA was at wavelength of 408 nm. SEM images showed that the morphology of AgNPs was globular. An average size of silver nanoparticles using PVA and without using PVA was 78.3 and 76.1 nm, respectively. The results of X-Ray Diffraction (XRD) displayed the same peak pattern with that of the standard silver metal showing that the resultant particles are silver nanoparticles having FCC structure. Analysis of glucose levels in blood using silver nanoparticles based sensors showed glucose concentration of 71.71 mg / dL.

Pengaruh Konsentrasi Glutaraldehid Pada Komposisi Membran Elektroda Biosensor Pestisida Karbamat Mashuni Mashuni; Muhammad Syahrul; Ahyar Ahmad; Abdul Wahid Wahab
Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta) Volume 3 No 1 - June 2010
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/ica.v3i1.5970

In recent years carbamic pesticides, which show low environmental persistence but a high acute toxicity. Their presence in environmental and food poses a potential hazard to human health and there is a growing interest in their rapid and accurate determination for food safety and environmental monitoring. The aim of this research is to design biosensor for analyzing carbamate pesticides residue in sample show with composite variable concentrate glutaraldehyde (GA) in electrode membrane. Enzim acetylcholinesterase (AChE) was co-immobilised with choline oxidase (ChO) onto a platinum (Pt) surface using a solution of 10% cellulose acetate and 15%, 20%, 25% glutaraldehyde. Result of this research show that glutaraldehyde 15% the detection limit is 10-7,8 M for glutaraldehyde 20% the detection limit is 10-8,4 M and glutaraldehyde 25% the detection limit is 10-8,7 M. This a results is approximately equal to 0,0022 ppm or 2,2 ppb – 0,0002 ppm or 0,2 ppb, which means that this biosensor is sensitive for determining carbamates pesticides residue where its detection limit is comparable to to the detection limit of conventional instrument such as Gas Chromatography (GC) and High Pressure Liquid Chromatography (HPLC), i.e. respectively 1,5 ppb and 2,0 ppb. The proposed electrochemical pesticide sensitivity test exhibited high sensitivity, desirable accuracy, low cost and simplified procedure.Keywords: Biosensors, glutaraldehyde, cellulose acetate, immobilised, carbamate Biosensors, glutaraldehyde, cellulose acetate, immobilised, carbamate pesticides

POTENTIAL NA-ALGINATE EXTRACT FROM BROWN ALGAE sargassum sp. OF THE MANGO MATURATION PROCESS Tanti Iriyanti; Abdul Wahid Wahab; Rohani Bahar
Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta) Volume 11, No.2: December 2018
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/ica.v11i2.6488

Extraction of Na-alginate from Sargassum sp. and its application in ripening mangoes has conducted. This research aimed to determine the mango storage period by using sodium alginate solution as edible coating and optimum concentration that has maximum inhibition power to the maturation the mango. The FTIR result shows that sodium alginate by the result ofthe extraction has the same similar functional group to the sodium alginate in the factory. Quantitative analysis show that content of sodium alginate as the result of the extraction is 22,42%, sodium alginate solution is 1% has pH 10,97 and the viscosity is 90 cps, the water measure of sodium alginate is 11,27% with the measure of ash is 41,47%. By testing the ability of sodium alginate conducted on mango with submersion method in the solution concentration from 0-50 ppm. At a concentration of 20 ppm solution shows that the maximum of storage period is about 15 days at room temperature while without submersion is just about 5 days. By this study, we indicate that sodium alginate potentially as coating fruit preservation.

PELATIHAN PENGUKURAN EMISI GAS KARBON MONOKSIDA (CO) DAN NITROGEN OKSIDA (NOX) PADA KENDARAAN BERMOTOR DI SMA NEGERI 2 BONE Abdul Wahid Wahab; Nursiah La Nafie; Musa Ramang; Indah Raya; Yusafir Hala
Panrita Abdi - Jurnal Pengabdian pada Masyarakat Vol. 3 No. 2 (2019): Jurnal Panrita Abdi - Oktober 2019
Publisher : LP2M Universitas Hasanuddin

Training Of Carbon Monoxide (CO) Gas and Nitrogen Oxide (NOx) Measurement Emissions In Motor Vehicles at State High School 2 BoneAbstract. Every year the population in Bone Regency was increased. The increasing population every year has meant the transportation need will be increase because to support mobility and community activities in Bone Regency, Its means that transportation is absolutely necessary. Based on BPS data from Bone Regency, in 2016 the population was 746.973 people. The increasing number of motorized vehicles from year to year will cause air pollution. Environmental conditions in Bone Regency are declining due to high human activities, namely household activities that have reached 14%, industry 18%, commercial 3%, others 9% and means of transportation 56%. To produce good environmental conditions, especially at the location of Senior High School 2 Bone-in Bone Regency, we held community service by introducing and applying and utilizing PEM-9004 instrument to measure carbon monoxide (CO) and nitrogen oxide (NOx) gas emissions in motorized vehicles in particular vehicles belonging to teachers and students at Senior High School 2 Bone. The measurement results showed CO gas emissions on matic motors which were 0.087%, NO gas emissions by 32 ppm and NOx at 33 ppm. While the percentage of CO and NOx gas emissions in duck motors is 0. During the measurement, there was also a decrease in gas emission temperature from 38.6oC to 36.9oC with a testing time of 60 seconds each. Based on the results of the activity data, it is obtained that the percentage of CO and NOx gas emissions of the motorbike is greater than the duck motor of teachers and students at Senior High School 2 Bone.Keywords: PEM-9004, carbon monoxide (CO), nitrogen oxide (NOx), Senior High School 2 BoneAbstrak. Setiap tahun jumlah penduduk di Kabupaten Bone mengalami peningkatan. Semakin meningkatnya jumlah penduduk setiap tahunnya, maka sarana transportasi akan semakin meningkat karena untuk menunjang mobilitas dan aktivitas masyarakat di Kabupaten Bone maka sarana transportasi merupakan kebutuhan yang mutlak diperlukan. Berdasarkan data BPS Kabupaten Bone, tahun 2016 jumlah penduduk sebesar 746.973 jiwa. Meningkatnya jumlah kendaraan bermotor dari tahun ke tahun akan menimbulkan polusi udara. Kondisi lingkungan di daerah Kabupaten Bone semakin menurun karena tingginya aktivitas manusia yaitu kegiatan rumah tangga telah mencapai 14%, industry 18%, komersial 3%, lainnya 9% dan sarana transportasi 56%. Untuk menghasilkan kondisi lingkungan yang asri khususnya di lokasi SMA Negeri 2 Bone Kabupaten Bone maka diadakan pengabdian masyarakat dengan cara pengenalan dan pengaplikasian serta pemanfaatan Alat PEM-9004 untuk mengukur emisi gas karbon monoksida (CO) dan nitrogen oksida (NOx) pada kendaraan bermotor khususnya kendaraan milik guru dan siswa di SMA Negeri 2 Bone. Hasil pengukuran menunjukkan emisi gas CO pada motor matic yaitu 0,087%, emisi gas NO sebesar 32 ppm dan NOx sebesar 33 ppm. Sedangkan presentase emisi gas CO dan NOx pada motor bebek yaitu 0. Selama pengukuran juga terjadi penurunan suhu emisi gas dari 38,6 oC menjadi 36,9 oC dengan waktu pengujian masing-masing 60 detik. Berdasarkan data hasil kegiatan tersebut maka diperoleh bahwa presentase emisi gas CO dan NOx motor matic lebih besar di bandingkan dengan motor bebek milik guru dan siswa di SMA Negeri 2 Bone.Kata kunci: PEM-9004, karbon monoksida (CO), nitrogen oksida (NOx), SMA Negeri 2 Bone

Effect of Anodizing Time and Annealing Temperature on Photoelectrochemical Properties of Anodized TiO2 Nanotube for Corrosion Prevention Application Misriyani Misriyani; Abdul Wahid Wahab; Paulina Taba; Jarnuzi Gunlazuardi
Indonesian Journal of Chemistry Vol 17, No 2 (2017)
Publisher : Universitas Gadjah Mada

A study on the influence of anodizing time, annealing temperature and photoelectrochemical properties of TiO2 nanotube (TiO2 NT) has been investigated. The crystallinity was investigated using X-Ray Diffraction and the anti-corrosion performance of stainless steel 304 (SS 304) coupled with TiO2 NT was evaluated using electrochemical techniques under ultraviolet exposure. The optimum anodizing condition occurs at a voltage of 20 V for 3 h. After anodizing, the TiO2 NT amorf was calcined at 500 °C to obtain anatase crystalline phase. For the photoelectrochemical property, the effects of pH and NaCl concentration on corrosion prevention have been examined. The result showed that the corrosion rate of stainless steel 304 coupled with TiO2 NT can be reduced up to 1.7 times compared to the uncoupled stainless steel 304 (3.05×10-6 to 1.78×10-6 mpy) under ultraviolet exposure by shifted the photopotential to the more negative value (-0.302 V to -0.354 V) at a pH of 8 and 3% NaCl concentration (-0.264 V to -0.291 V). In conclusion, the TiO2 NT films, which was prepared by anodization and followed by annealing can prevent the corrosion of stainless steel 304.

Co-Authors Abdul Karim Abdul Karim Abdul Karim Ahyar Ahmad Amin, Ida Ifdaliah Anak Agung Istri Sri Wiadnyani Andi Suciati Azis, Hijrah A. Baharuddin Hamzah Dewi Lidiawati Fatimah Gappa, Maming I Wayan Sutapa Indah Raya Indah Raya Jarnuzi Gunlazuardi Mashuni Mashuni Misriyani Misriyani Misriyani Misriyani Muhammad Syahrul Muhammad Zakir Musa Ramang Musa, Bulkis Noor Jalaluddin NURAENI, ANDI Nuritasari Azis Nursiah La Nafie Nursiah La Nafie Nursiah La Nafie Nursiah La Nafie Nursiah La Nafie Nursiah La Nafie Paulina Taba Permatasari, Nur Umriani Ridhawati Thahir Ridhawati, Ridhawati Rino R. Mukti Rohani Bahar Rosalinda Zeniona Maarebia S, Giovanno Alvin Seniwati Dali Syaharuddin Kasim Ta'bi, Widi Aprilia Tanti Iriyanti Thahir, Ridhawati Triana Febrianti Yusafir Hala

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