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PENGGUNAAN 1,10-FENANTROLIN SEBAGAI ZAT PENOPENG PADA EKSTRAKSI KADMIUM DENGAN DITIZON Hamzah, Baharuddin
MARINA CHIMICA ACTA Vol 3
Publisher : Universitas Hasanuddin

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Abstract

The addition of 1.10-phenanthroline solution in cadmium extraction with dithizone has been investigated. The influence of pH and concentration of dithizone were studied as variables. The concentration of cadmium was determined by atomic absorption spectrophotometer after stripping the organic phase with nitric acid 0.1M. The result showed the optimum pH for extraction is 6,0 and the optimum concentration of ditizon is 5 x 10-4 M. The extraction constant is Kex = 5,05 x 10-5 . These value is higher than without addition of 1.10-phenanthroline, Kex = 5.521 x 10-10 . It means that the addition of 1.10-phenanthroline can increase the extraction constant of cadmium with dithizone.   Keywords : Extraction, cadmium , dithizone, 1.10-phenanthroline
PENGALIRAN UDARA UNTUK KENYAMANAN TERMAL RUANG KELAS DENGAN METODE SIMULASI COMPUTATIONAL FLUID DYNAMICS Latif, Sahabuddin; Hamzah, Baharuddin; Ihsan, Ihsan
Sinektika Vol 14, No 2: Juli 2014
Publisher : Universitas Muhammadiyah Surakarta

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Abstract

Sirkulasi udara yang baik sangat dibutuhkan pada ruang berventilasi alami untuk mencapai kenyamanan termal, karena dapat  mempercepat proses evaporative cooling,pengeluaran panas dan ketersediaan udara segar dalam ruang. Penelitian ini bertujuanmengkaji aliran udara pada Ruang Kelas Gedung Kuliah Bersama Fakultas TeknikUniversitas Hasanuddin di Kabupaten Gowa, agar ditemukan rekayasa pengaliran udarayang dapat mempercepat terjadinya proses pengeluaran panas. Penelitian eksperimentalini menggunakan metode simulasi CFD (Computational Fluid Dynamics). Parameter input dalam simulasi diperoleh melalui  pengukuran di lapangan berupa dimensi ruang kelas, luas bukaan ventilasi, dan parameter iklim mikro. Rekayasa aliran udara dilakukanterhadap tiga perlakuan yaitu kecepatan udara, luas bukaan, serta modifikasi darikecepatan udara dan luas bukaan. Analisis dilakukan untuk mengetahui bagian ruangyang mengalami aliran udara tinggi dan rendah serta mengetahui faktor pendukung dan kendala dengan menggunakan perangkat lunak SolidWorks Simulation 2013. Hasilpenelitian memperlihatkan bahwa sistem ventilasi eksisting ruang-ruang kelas dapatmendistribusikan pergerakan udara yang nyaman di dalam ruang antara 0.25 m/s hingga 1.5 m/s, pada parameter inlet 1 m/s hingga 3 m/s dengan kenyamanan ruangan (51.85%) hingga (85.19%). Setelah dilakukan perbaikan sistem ventilasi pada ruang kelas,kenyamanan ruang dapat ditingkatkan menjadi (96.30%) hingga (100%), dengan rasioluasan bukaan ventilasi (21.60%) dari luas lantai ruangan, dengan rincian luas bukaaninlet (14.50%) dan luas bukaan outlet (7.10%). Disimpulkan bahwa penambahan luas inlet dan outlet dengan rasio yang tepat pada ruang kelas, dapat mengoptimalkansirkulasi udara. Diharapkan agar jendela kaca mati pada ruang-ruang kelas di buka untukmenambah luas inlet dan penambahan luas bukaan dinding outlet bagian bawah, pintusebaiknya di tutup pada saat ruang digunakan.
Penentuan Kondisi Optimum (Konsentrasi HCl dan Konsentrasi Ion Merkuri) pada Ekstraksi Ion Hg2+ Menggunakan Teknik Emulsi Membran Cair Supriyatno, Tri Octivan; Hamzah, Baharuddin; Said, Irwan
Jurnal Akademika Kimia Vol 6, No 3 (2017)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2017.v6.i3.9443

Abstract

Study on the extraction of mercury ion had been done using emulsion liquid membrane technique. The aim of this study was to determine the optimum condition on mercury ion extraction in solutions those include variations in concentration of HCl solution (0.5 to 2.5) M and variation in concentration of mercury (15-35) ppm.This study was conducted using laboratory experimental method with benzoyl acetone as cation carrier, kerosene as membrane phase, HCl solution as an internal phase, Span-80 and Span-20 as surfactants, and mercury solution as the sample. Determination concentration of mercury ion in external phase was analysed using UV-Vis spectrophotometer. The result showed that the concentration of HCl solution resulted in the optimum percentage of extraction with the percent extraction of 95.31% was at 2 M. In addition, the concentration of mercury solution resulted in percent optimum extraction of 96.58% was at a concentration of 30 ppm.
Penerapan Pendekatan Contextual Teaching And Learning (CTL) Pada Materi Larutan Penyangga Kelas XI IPA 1 SMA Negeri 1 Poso Pesisir Utara Riyadi, Bayu; Hamzah, Baharuddin; Sakung, Jamaluddin
Jurnal Akademika Kimia Vol 4, No 1 (2015)
Publisher : Universitas Tadulako

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The use of learning approach applied to the study of chemistry is still one-way, the student just as a listener and not actively involved in the learning process. This research aims to determine the learning outcomes to the students who take buffer to the grade XI IPA I SMAN 1 Poso Pesisir Utara with contextual teaching and learning approach was better than the grade that follows the learning without contextual teaching and learning approach. The research population was all students of class XI IPA I SMAN 1 Poso Pesisir Utara in academic year 2013-2014 amounted to 65 studets were distributed in to classes. The research sample was determined by purposive sampling, 33 class XI IPA I as the experimental class and 32 class XI IPA 2 as control class. The data collection using test instruments in the form of 18 multiple-choice items that had been tested for validity and reliability. chemistry achievement of buffer test material, research data testing use t-test statistical p-analysis of the parties to the prerequisite test, test for normality and homogeneity tests. The analysis statistical hypothesis t-test was obtained value of tcalculate = 2.41 and ttable value = 1.67 this implies rejection of Ho. It can be concluded that the approach contextual teaching and learning effect on learning outcomes of students of the grade XI IPA I at SMAN 1 Poso Pesisir Utara in the material buffer with a good score than the conventional learning.
Penentuan Perbandingan Volume Fasa Membran dan Volume Fasa Internal serta Lama Waktu Ekstraksi pada Proses Ekstraksi Ion Merkuri Menggunakan Teknik Emulsi Membran Cair Genefefa T., Fulgensia; Hamzah, Baharuddin; Ningsih, Purnama
Jurnal Akademika Kimia Vol 6, No 3 (2017)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2017.v6.i3.9439

Abstract

This study aimed to determine the optimum condition on the extraction process of mercury ions with the variables of study on the ratio of membrane phase volume and internal phase volume (Mp:Ip) and the extraction time which will provide the greatest percent extraction. Sample used in this study was an artificial sample containing Hg(II) ions with a concentration of 10 mg/L. Hg(II) ions will be distributed into internal phase through membrane phase formed from a mixture of surfactants, kerosene and chelating compounds. Concentration of mercury ions remained in the samples was analyzed using a UV-VIS spectrophotometer at a wavelength of 490 nm with ditizon as a complex. The optimum condition was achieved at a volume ratio of membrane phase (Mp) with internal phase (Ip) of 2:2, and the extraction time was for 10 minutes, where percent extractions were 66.11% and 82.23%, respectively.
PENGARUH ION KROMIUM(III) PADA EKSTRAKSI ION TEMBAGA(II) MENGGUNAKAN EMULSI KEROSEN DENGAN 1-FENIL-3-METIL-4-BENZOIL-5-PIRAZOLON SEBAGAI PEMBAWA KATION Hamzah, Baharuddin; Said, Irwan; Hardani, Ririen
Jurnal Akademika Kimia Vol 2, No 3 (2013)
Publisher : Universitas Tadulako

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Abstract

The influence of chromium(III) ion on copper(II) ion extraction using kerosene emulsion with 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone (HPMBP) as a cation carrier was investigated. The optimum condition for copper(II) extraction were as follows: concentration of mixed surfactant (span 80+span 20) was 5%, volume ratio of kerosene and internal phase was 1, concentration of HPMBP was 0.025 M, concentration of HCl was 1 M, volume ratio of emulsion and external phase was 0.143. The results showed that the extraction of copper(II) ion was selective to chromium(III) ion, relatively. The result also showed that the presence of 500 ppm chromium(III) ion decrease the percentage of copper(II) ion extraction from 98.6 to 91.0.
Analisis Kadar Timbal (Pb) Dalam Daging Kerang Bakau (Polymesoda erosa) Dan Kerang Darah (Anadara granosa) Di Perairan Salule Pasangkayu Sulawesi Barat Rahmawati, Rahmawati; Hamzah, Baharuddin; Nuryanti, Siti
Jurnal Akademika Kimia Vol 4, No 2 (2015)
Publisher : Universitas Tadulako

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Bivalve os one marine animals that can efficiently accumulate to heavy metal. This is due to they livein the base layer of the sediment in the aquatic and they are moving very slowly. Therefore, it has beendone a research about the analysis of consentration of lead (Pb) in the bivalve polymesoda erosa sp andthe bivalve anadara granosa at the aquatic of Salule Pasangkayu West Sulawesi has been reported byusing direct spectro. The research’s aim was to analyze concentration of Pb as heavy metal in the bivalvepolymesoda erosa and the anadara granosa sp, The results obtained that concentration of Pb at muddyplaces was higher than at sandy area. Level of Pb showed that Pb exceeds quality standard in both clamswhere in the blood clam was 3.75 mg/Kg and 3.857 in dry weight, while the Mangrove calm showedthe result of 5,00 mg/Kg and 5.25 mg/Kg in dry weight.
Ekstraksi Ion Merkuri MenggunakanTeknik Emulsi Membran Cair dengan Variasi Konsentrasi Benzoil Aseton dalam Fasa Membran dan Variasi pH Fasa Eksternal Sulniawati, Sulniawati; Hamzah, Baharuddin; Abram, Paulus Hengky
Jurnal Akademika Kimia Vol 6, No 4 (2017)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2017.v6.i4.9454

Abstract

Mercury ion extraction using the liquid membrane emulsion technique with the variation of benzoil aseton concentration in membrane phase and variation of pH of external phase has been done. The sample containing Hg2+ ions with a concentration of 20 mg/L. Variation of benzoil aseton were concentration of 0.01 M, 0.015 M, 0.02 M and 0.025 M, whereas variation of external phase pH used were 1,5; 2; 2,5; 3 and 3,5. The measurement of extraction was conducted by using UV-Vis spectrophotometer. The results showed that the largest percent extraction on the extraction of mercury ions in solution by using liquid membrane emulsion was at a concentration of benzoil aseton 0.02 M with the percentage of extraction 79.33% and the pH external phase 2 with the percentage of extraction 85.30%.
Pengaruh Konsentrasi Surfaktan dan Perbandingan Volume Emulsi dengan Volume Fasa Eksternal Pada Ekstraksi Ion Merkuri Menggunakan Teknik Emulsi Membran Cair Hidayah, Nurul; Hamzah, Baharuddin; Ningsih, Purnama
Jurnal Akademika Kimia Vol 6, No 3 (2017)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2017.v6.i3.9440

Abstract

Mercury ion extraction has been done using emulsion liquid membrane technique a research. The aim of the study is to determine the optimal conditions at the extraction process of mercury ion with research variables, namely variations of the surfactant concentration and the volume ratio of emulsion and external phase (Ve:Veks). In this study, the sample was 20 mg/L of Hg2+ ions in concentration. The concentration of mercury ions remaining in the sample after extraction were analyze using a UV-Vis Spectrophotometer at a wavelength of 490 nm using ditizon as complexation. The optimum condition far varying concentrations surfactant was 2% and the volume ratio of emulsion (Ve) and external phase (Veks) was 1:5 with the percentage of extraction respectively 47.65% and 56.80%.
Penerapan Model Pembelajaran Snowball Throwing Berbantuan Kode SMILES pada Materi Hidrokarbon Terhadap Hasil Belajar Siswa Kelas XI SMA Negeri 5 Palu Djahir, Ahmad Rifaldi; Walanda, Daud K.; Hamzah, Baharuddin
Jurnal Akademika Kimia Vol 3, No 4 (2014)
Publisher : Universitas Tadulako

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Snowball throwing learning model is a modification of aquastion technique. This technique is focused on the ability to formulate questions which are combined in a game called snowball throwing. SMILES is a simple chemical notation comprehensive where the scructures of molecules can be found by using ASCII character which representing atom and bond symbol. The study aim is to determine the influence of snowball throwing assisted learning model SMILES code on hydrocarbon material to the learning outcomes of students clas XI in SMA Negeri 5 Palu. This study is experimental with pretest and posttest control group design, in which the samples are students of class XI IPA 2 (n=33) as experimental group while students of clas XI IPA 4 (n=32) as control group. The testing data used t-test statistical analysis one side (right) with pre-requisite test, normality test and homogeneity. The result of data analysis are the score of X1 experiment class is 73.81 with standard deviation is 8.19 while score of X2 control group is 65 with standard deviation is 14.36. Based on testing hypothesis result that tcounted>ttable is 3.05 > 1.67 with significance level 0.05 and confidence level = 63. The results show that H0 is rejected and H1 is accepted then it is concluded that the application of Snowball Throwing assisted learning model SMILES code on hydrocarbon material positively influence to the learning outcomes of students class XI in SMA Negeri 5 Palu.