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All Journal Natural Science: Journal of Science and Technology KOVALEN: Jurnal Riset Kimia JKPK (Jurnal Kimia dan Pendidikan Kimia) KAIBON ABHINAYA : JURNAL PENGABDIAN MASYARAKAT Jurnal Riset Sains dan Kimia Terapan

Husain Sosidi

Analytical Chemistry, Chemistry Department, Tadulako University

Author-ID : 385349

Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Economics, Econometrics & Finance

Published : 21 Documents Claim Missing Document

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The Effect of pH and Concentration of KNO3 Solution to the Performance of Nd3+ Ion Selective Electrode Using HPMBP Ionophore Sosidi, Husain; Buchari, Buchari; Noviandri, Indra
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 3, No 3 (2018): JKPK( Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

The phenyl-3-methyl-4-benzoyl-5-pyrazolone (HPMBP) synthesized and characterized as ionophore in potentiometric analysis of ion selective electrode method (ISE) with polytetrafluoroethylene (PTFE) as the supporting phase. The pH and concentration of the ionic strength adjuster (ISA) were varied to know at the optimum pH and concentration of the ion-selective electrode (ESI) KNO3, thus potential Nd3+ gives the best performance. Before use the PTFE membrane was immersed in a chloroform-HPMBP solution of 1.5-2.0% w/v for 24 h. The pH variation of the buffer solution was adjusted to the pH range of 2-10 using HCl and NaOH solutions, whereas the concentration of KNO3 varies from 10-1 to 10-3 M. The concentration range of Nd3+ is between 10-2 and 10-7 M. The electrode potential measurement results (ENd) obtained the best performance value at pH 4 with KNO3 concentration of 10-2 M, sensitivity (S) 18.39 ± 1.2 mV/decade and response time less than 23 s.

KAJIAN FISIKA KIMIA LIMBAH STYROFOAM DAN APLIKASINYA Sumarni, Ni Ketut; Sosidi, Husain; Rahman, Abd.; Musafira, Musafira
Natural Science: Journal of Science and Technology Vol 2, No 3 (2013): Volume 2 Number 3 (December 2013)
Publisher : Univ. Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (240.478 KB)

Penelitian ini bertujuan untuk mendapatkan senyawa polistyren yang memiliki sifat hampir sama dengan polimer alam yaitu amilosa yang diperoleh dari pati amprotab sehingga dapat dipadukan atau di-poliblend. Pada tahapan ini dilakukan analisis sifat polimer yang meliputi gugus fungsi dan massa molekul relatif rata-rata polimer. Dari hasil analisis gugus fungsi dengan FTIR, polistyren termasuk senyawa non polar karena tidak terlihat adanya puncak serapan disekitar 3600 - 3200 cm-1 yang disebabkan vibrasi ikatan hidrogen dari gugus -OH. Sifat non polar ini dapat dirubah menjadi sifat polar dengan melakukan sulfonasi terhadap polistyren menjadi polistyren tersulfonasi. Hasil analisis gugus fungsi polistyren tersulfonasi, menunjukkan adanya puncak serapan yang lebar disekitar 3600 - 3200 cm- yang disebabkan vibrasi ikatan hidrogen dari gugus ?OH. Sedangkan massa molekul relatif rata-rata yang terukur untuk polistiren tersulfonasi (PSS) diperoleh 54.688,27 g/mol sedangkan amilosa diperoleh sebesar 70.987,45 g/mol jika dibandingkan dengan amilopektin yang diperoleh sebesar 95.225,47 g/mol, sehingga PSS lebih memungkinkan dapat dipoliblend dengan amilosa jika dibandingkan dengan amilopektin. Selain itu kesamaan sifat juga dimiliki oleh PSS dan amilosa yaitu sama-sama memiliki struktur rantai lurus sedangkan amilopektin memiliki struktur rantai bercabang. Perbandingan komposisi poliblend yang dibuat meliputi PS:Amilosa (80:20b/b), PSS:Amilosa (100:0, 90:10, 80:20, 70:30, 60:40, 50:50) dan masing dilakukan karakterisasi meliputi Analisis gugus fungsi, Analisis uji tarik, Analisis sifat termal, Analisis sifat kristal, Analisis permukaan dan Uji biodegradasi.

PERBANDINGAN KADAR MINERAL MAKRO DAN MIKRO PADA BERBAGAI JENIS UBI BANGGAI (Dioscorea sp.) Krisma Meylin Lasampa; Khairuddin Khairuddin; Prismawiryanti Prismawiryanti; Husain Sosidi
KOVALEN: Jurnal Riset Kimia Vol. 5 No. 1 (2019): Edisi April
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Penelitian tentang kandungan mineral makro kalium, natrium, magnesium dan mineral mikro seng yang terkandung dalam Ubi Banggai (Dioscorea sp) berwarna ungu, kuning dan putih telah dilakukan. Tujuan dari penelitian ini adalah untuk mengetahui perbandingan mineral makro dan mikro dari berbagai jenis ubi banggai (Dioscorea sp) berwarna ungu kuning dan putih. Hasil penelitian menunjukan kadar mineral yang terkandung dalam ubi banggai berwarna ungu rata-rata lebih tinggi daripada ubi banggai berwarna kuning dan putih. Kadar mineral kalium dalam ubi banggai berwarna ungu, kuning dan putih masing-masing sebesar 102,725 ppm; 57,65 ppm; 24,525 ppm, mineral natrium masing-masing sebesar 27,65 ppm; 11,575 ppm; 9,8 ppm, mineral magnesium masing-masing sebesar 11,13 ppm; 11,15 ppm; 11,03 ppm dan mineral seng masing-masing sebesar 21,95 ppm; 15,89 ppm; 15,51 ppm.Kata Kunci : Ubi banggai, kalium, natrium, magnesium, seng

PEMANFAATAN KARBON AKTIF AMPAS TAHU TERAKTIVASI NaCl SEBAGAI PENYERAP ZAT WARNA CONGO RED Sutomo Eka Putra; Khairuddin Khairuddin; Dwi Juli Puspitasari; Husain Sosidi
KOVALEN: Jurnal Riset Kimia Vol. 5 No. 1 (2019): Edisi April
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Telah dilakukan penelitian mengenai pemanfaatan karbon aktif ampas tahu teraktivasi NaCl sebagai penyerap zat warna Congo Red. Penelitian ini bertujuan untuk mengetahui kemampuan karbon aktif ampas tahu teraktivasi NaCl dalam menyerap zat warna Congo Red . Penelitian ini menggunakan rancangan acak lengkap dengan tiga variabel bebas yaitu konsentrasi aktivator, waktu kontak dan pH sedangkan variabel terikat yaitu persentase Congo Red yang terjerap. Hasil penelitian menunjukkan penyerapan terbaik diperoleh pada karbon aktif ampas tahu teraktivasi NaCl 3M dengan waktu kontak optimum selama 60 menit pada kondisi pH 2. Dari penelitian ini diketahui bahwa limbah ampas tahu dapat dimanfaatkan menjadi karbon aktif.Kata kunci: Karbon Aktif, Ampas Tahu, Zat Warna Congo Red, Adsorpsi

Analisis Kadar Glukomanan Dari Biji Durian (Durio zeibethinus Murr) dengan Metode Spektrofotometri pada Berbagai Waktu dan Suhu Hidrolisis: Analysis of Glucomannan Content From Durian Seeds (Durio zeibethinus Murr) Using Spectrophotometry Methods in Several Hydrolysis Times and Temperatures Darmawati Darmawati; Syaiful Bahri; Husain Sosidi
KOVALEN: Jurnal Riset Kimia Vol. 6 No. 2 (2020): Edisi Agustus
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2020.v6.i2.11582

Durian seeds are one type of seed that contains glucomannan. The aim is to determine glucomannan levels in the durian seed. The study was designed using a completely randomized design (CRD). The extracted glucomannan was determined by the spectrophotometry method at various temperature and hydrolysis time. The crude extract of glucomannan was hydrolyzed using 3 M HCl for 70, 80, 90, 100, and 110 minutes at 70, 80, 90, 100, and 110°C. The highest glucomannan concentration of 39.60% was obtained at a hydrolysis temperature of 100°C for 100 minutes. The analysis of the FTIR spectrophotometer shown that the vibration of the C-O-C functional group (glycoside bond) was obtained at the wavelength number of 1020.34 cm-1 which is a characteristic of glucomannan. Keywords: glucomannan, durian seed, hydrolysis, spectrophotometry

STUDI ADSORPSI LOGAM Pb PADA TANAH TERCEMAR ABU TERBANG (Fly Ash) DENGAN MENGUNAKAN TANAMAN KANGKUNG DARAT (Ipomoea reptans Poir) Yul Uca Sali Putri; Khairuddin; Husain Sosidi; Dwi Juli Pusptasari
KOVALEN: Jurnal Riset Kimia Vol. 5 No. 2 (2019): Edisi Agustus
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Pb metal adsorption studies on land water spinach (Ipomoem reptans poir) have been carried out. The method of analysis was carried out using a completely randomized design with two independent variables, i.e amount of Pb metal concentration adsorb on the roots of land spinach and the lifetime of the land spinach roots. The results show that the amount of Pb metal adsorp on the land spinach roots with variations in the age of 2-5 consecutive weeks was 0,023 µg/g; 0,03 µg/g; 0,084 µg/g; 0,099 µg/g, respectively. The results of both statistical tests, F test and LSD test, show that there was a significant difference in the concentration of Pb in each age of harvest, which in the fifth week showed the highest Pb level. BCF test results show that Pb metal adsorption takes piace with a phytoextraction mechanism. Keywords: Absorption, Lead Metal, Land Weter Spinach, Pb Levels, Length Of Planting Time

ADSORPSI LOGAM Pb dan Cu DARI PELUMAS BEKAS MENGGUNAKAN BLENDING SELULOSA ASETAT-KITOSAN Fitra Langgeng Mangesti; Husain Sosidi; Prismawiryanti; Syamsuddin
KOVALEN: Jurnal Riset Kimia Vol. 5 No. 2 (2019): Edisi Agustus
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Research on adsorption of Pb and Cu metals from used lubricants has been carried out using cellulose acetate-chitosan blending which aims to determine the best ratio and pH between cellulose acetate and chitosan which can adsorb metal Pb and Cu from used lubricants. Cellulose acetate was synthesized through the acetylation method using cellulose extracted from palm fiber coir. The obtained cellulose acetate is brown fine powder with a yield of 62% and has a water content of 20%. Cellulose acetate was characterized using FT-IR while adsorption of Pb and Cu metals from used lubricants using AAS. The results of FT-IR analysis showed the formation of cellulose acetate with an absorption band of 1637.56 cm-1 which proved the presence of carbonyl groups (C = O). The AAS results showed that the best ratio and pH to absorb Pb and Cu metals in used lubricants is 3:1 with pH 6. Keywords: palm oil coir, acetate cellulose, chitosan, used lubricants

Siklisasi Sitronelal Menggunakan Polimer Penyangga Katalis H2SO4 Berbahan Dasar Eugenol: Citronellal Cyclization Using Polymer Based-Eugenol Supported H2SO4 Catalyst Moh. Rifki Saputra; Erwin Abdul Rahim; Husain Sosidi; Ni Ketut Sumarni
KOVALEN: Jurnal Riset Kimia Vol. 7 No. 1 (2021): Edisi April
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2021.v7.i1.13660

Research on citronellal cyclization using a polymer based on eugenol supported H2SO4 catalyst has been carried out. The study aim was to determine the ratio of the addition of polymer based-eugenol supported H2SO4 catalyst used to produce the highest isopulegol. Citronellal cyclization was carried out using variations of catalyst concentration (1, 2, 3, 4, and 5%) and reaction time (30, 60, and 90 minutes). The results have obtained a yield of 50.67% found in the catalyst concentration of 1% and 90 minutes reflux time. From the results of GC-MS analysis, 29 compounds were read and among them isopulegol which was read at retention time 19.703 at peak 9 and peak area 4.76%. And the isopulegol results obtained are 11.34%.

Adsorpsi Logam Merkuri (Hg) dari Limbah Tanah Tercemar Menggunakan Tanaman Sawi (Brassica juncea L) pada Berbagai Waktu Tanam: Adsorption of Mercury (Hg) from Contaminated Soil Waste Using Sawi Plants (Brassica juncea L) in Various Planting Times Khairuddin; Wiranto Wengkau; Dwi Juli Puspitasari; Husain Sosidi; Nov Irmawati Inda
KOVALEN: Jurnal Riset Kimia Vol. 7 No. 1 (2021): Edisi April
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2021.v7.i1.13666

Mercury (Hg) as a gold extractor can cause environmental pollution, therefore, hyperaccumulator plants are needed, such as mustard greens (Brassica juncea L). Research on the effect of planting time of mustard greens on the adsorption of mercury (Hg) metal ion on contaminated soil waste has been carried out. The purpose of this research was to determine the concentration and adsorption mechanism of Hg metal ion from contaminated soil at roots and canopy of mustard plants at various planting times. Amount of Hg metal ion adsorbed on the roots and canopy of mustard greens at 2, 4, and 6 weeks of planting times were analyzed using Atomic Absorption Spectrophotometry (AAS). The results showed that the average levels of Hg metal ion adsorption at various planting time of 2, 4, and 6 weeks at roots were 156.611 μg/g, 810.256 μg/g, and 888.711 μg/g, respectively, and at the canopy were 69.486 μg/g, 134.580 μg/g, and 60.416 μg/g, respectively. The planting time of 6 weeks resulted in the highest adsorption ability of Hg at the roots. The results of the bioconcentration factor (BCF) test showed that the adsorption of Hg in the roots and canopy of the mustard plant took place using a phytoextraction mechanism (BCF < 1).

Pemisahan Logam Tanah Jarang dari Limbah (Tailing) Emas Poboya dengan Metode Pengendapan: Separation of Rare Earth Metals from Poboya Gold Waste (Tailings) by Deposition Method Arianto; Husain Sosidi; Prismawiryanti; Dwi Juli Pusptasari
KOVALEN: Jurnal Riset Kimia Vol. 6 No. 1 (2020): Edisi April
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2020.v6.i1.13861

Gold tailings are waste generated from gold mining activities and contain minerals and rare-earth metals (REM) that are much needed in current technological developments. This research was conducted to determine the REM content contained in Poboya gold tailings, through the destruction process using sulfuric acid and precipitation using ammonium hydroxide. The results were showed that the level of REM contained in Poboya gold tailings was 6-7%. REM oxide content analysis performed with Scanning Electron Microscopy - Energy Dispersive X-Ray Spectroscopy (SEM-EDS) obtained 6 types of REM with the main REM levels namely Terbium (Tb): 77-80% dan Lanthanum (La): 13%, as well as other rare-earth metals with smaller amounts of Europium (Eu): 4-5%, Cerium (Ce): 2%, Neodymium (Nd): 0.02% and Gadolinium (Gd): 0.02%. Poboya gold waste can be used by the community as a source of REM and used in various industries. Keywords: Gold tailings, rare earth metals (REM), destruction, precipitation

Co-Authors Abd. Rahman Abustiana, Rahma Lolita Ahmad Ridhay Aini Auliana Amar Arianto Buchari Buchari Darmawati Darmawati Dwi Juli Puspitasari Dwi Juli Pusptasari Dwi Juli Pusptasari Dwiyana, Putri Eka Lindawati Erwin Abdul Rahim Fitra Langgeng Mangesti Hardi Ys. Helni Febriani Indra Noviandri Indriani Indriani Jusman Jusman, Jusman Khairuddin Khairuddin Khairuddin Krisma Meylin Lasampa Lisma Habiba Minda M Mirzan, Muhamad Moh. Mirzan Moh. Mirzan Moh. Rifki Saputra Muh.Ricky Arisandi M. Tahili Musafira Musafira Ni Ketut Sumarni Nov Irmawati Inda Nurakhirawati Nurhaeni Prismawiryanti Prismawiryanti Ramli, Aksar Ruslan Ruslan Ruslan Ruslan Ruslan Sitti Nur Halizah Sutomo Eka Putra Syaiful Bahri Syamsuddin Syamsuddin Ulayya Kasio Wiranto Wengkau Yul Uca Sali Putri

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