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INDONESIA
Jurnal Kimia Riset
Published by Universitas Airlangga
ISSN : -     EISSN : -     DOI : -
Core Subject : Science,
Chemistry
Arjuna Subject : -
Articles 200 Documents
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ANALISIS DISINFEKTAN FENOL SECARA SIKLIK VOLTAMMETRI Pirim Setiarso Setiarso; Nita Kusumawati; Lenny Yuanita; Tukiran Tukiran; Samik Samik
Jurnal Kimia Riset Vol. 5 No. 2 (2020): Desember
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jkr.v5i2.22489

Abstract

ANALISIS DISINFEKTAN FENOL SECARA SIKLIK VOLTAMMETRI  Pirim Setiarso*, Nita Kusumawati, Lenny Yuanita, Tukiran, Samik Jurusan Kimia FMIPA, Fakultas Matematika dan Ilmu Pengetahuan AlamUniversitas Negeri Surabaya, Jl. Ketintang, Surabaya, 60231e-mail : pirimsetiarso@unesa.ac.id ABSTRAKTelah dilakukan penelitian Analisis Disinfektan Fenol Secara Siklik Voltametri. Fenol merupakan derivat dari benzena yang salah satu atom H diganti dengan gugus OH. Fenol bersifat racun oleh karena itu, fenol digunakan sebagai disinfektan. Beberapa disifektan yang dijual dipasaran mengandung fenol dan harus memenuhi standar kesehatan.Analisis fenol dilakukan dengan siklik voltammetri menggunakan elektroda graphen oksida yang dibuat dari karbon pensil 2B. Elektrada dibuat dengan campuran graphen oksida parafin dengan perbandingan 8:2. Pengukuran fenol pada disinfektan pasaran menggunakan parameter larutan KCl 5000 ppm sebagai elektrolit pedukung, larutan buffer fosfat pH 6,5. Waktu deposisi 5 detik, dan laju pindai 0,3 mV/s.Disinfektan fenol pasaran diukur berdasarkan kurva fenol standar dengan persamaan linier Y = -0.005507-5.00823 10-5 X dengan koefisien  regresi linear  R = 0.989229. Berdasarkan perhitungan kurva standar didapatkan kadar fenol disinfektan pasaran merek A= 26,48 ppm; B= 38,24 ppm .
FLOCCULANTS OPTIMIZATION IN HARVESTING FRESHWATER MICROALGAE Haematococcus pluvialis Dina Soes Putri; Desy Ambar Sari; Lulu Diani Zuhdia
Jurnal Kimia Riset Vol. 5 No. 1 (2020): Juni
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jkr.v5i1.20022

Abstract

Microalgae-based researches are one of the interesting topics to date due to its wide applications for commercial industries. One of the vital issues that remain in the production of large-scale microalgae is the harvesting process of microalgae culture. There are several techniques that can be used in harvesting microalgae and each algae will be showing a different result. In this research, the microalgae Haematococcus pluvialis were harvested using flocculation-filtration method. Alum in different dosages, range from 0.25-2 g/L, was used as flocculants and the mixing duration was investigated to seek out the best harvesting efficiency. Based on the research, it can be concluded that the optimum flocculation process was alum addition of 1 g/L culture that continuously stirring for 5 minutes long. In which the flocculation efficiency reaches 94.5%.
The Utilization of Poly-37,40-diallyl-38,39,41,42,-tetrahydroxycalix[6]arenes Compound as Adsorbent for Heavy Metal Cations Cd(II), Cr(III) and Cu(II) Susy Yunita Prabawati; Jumina Jumina; Sri Juari Santosa; Mustofa Mustofa
Jurnal Kimia Riset Vol. 5 No. 2 (2020): Desember
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jkr.v5i2.22260

Abstract

This research aims to examine the capability of poly-37,40-diallyl-38,39,41,42,-tetrahydroxy-calix[6]arenes as adsorbent for heavy metal cations such as Cd(II), Cr(III) and Cu(II). The adsorption process was carried out by batch method in the variation of acidity (pH), contact time and initial concentration of metal ions. The adsorption kinetics and adsorption isotherms were also studied. The results of this research showed that the amount of adsorbed metal increased with the increasing of the pH of metal solution. The amount of metal ions Cd(II) and Cr(III) adsorbed was optimum at pH 5, while for metal ion Cu(II) was optimum at pH 4. The optimum contact time for Cd(II), Cr(III) and Cu(II) was 60; 30; and 180 minutes, respectively. The study of adsorption kinetics showed that the adsorption of Cd (II), Cr (III) and Cu (II) metal ions using this adsorbent followed kinetics model of Ho. Isothermal studies showed that the adsorption of the three metal ions tends to follow the Langmuir isotherm. The adsorption capacities of Cd (II), Cr (III) and Cu (II) metal ions with poly-37,40-diallyl-38,39,41,42,-tetrahydroxycalix[6]arenes were 7.06; 14.72 and 38.45 µmol/g, respectively.  
Penentuan Status Mutu Air Tanah Dangkal di Sekitar Tempat Pembuangan Akhir Sampah (TPA) Air Sebakul Kota Bengkulu menggunakan Metode STORET: A Cross-Sectional Study Deni Agus Triawan; Doni Notriawan; Gustria Ernis
Jurnal Kimia Riset Vol. 5 No. 1 (2020): Juni
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jkr.v5i1.17053

Abstract

Ground Water quality has a special significance for drinking, hygiene sanitation and domestic water supply. The study aims to understand the distribution of ground water quality in solid waste landfill of Bengkulu City. The following objectives of the study are to determine ground water quality parameters such as pH, total dissolved solid, electrical conductivity, hardness, iron, manganese, nitrate and nitrite. Sampling was carried out at a radius of 0 - 250 meters from the location of the landfill. The results of the pH at 10 sampling points show the values that are quite varied between 6,45 – 7,59; conductivity between 56 µS – 492 µS; TDS between 28 mg/L – 246 mg/L; salinity 32 mg/L – 284 mg/L; Iron (Fe) 0,040 mg/L – 0,323 mg/L; Manganese (Mn) 0,089 mg/L – 0,295 mg/L; Nitrate (NO3-) 0,2 mg/L – 0,8 mg/L and Nitrite (NO2-) 0,006 mg/L – 0,033 mg/L. Based on an assessment with the STORET system, water quality in the study area is classified as good (score =-4) by parameters such as temperature, pH, total dissolved solid, electrical conductivity, hardness, iron, manganese, nitrate and nitrite. By the total sampling sites, all sample site had good-quality water for hygiene sanitation based on STORET method.
Karakterisasi Pasta Gigi Berbahan Abrasif Hidroksiapatit (HAp) Agung Rimayanto Gintu; Elizabeth Betty Elok Kristian; Yohanes Martono
Jurnal Kimia Riset Vol. 5 No. 2 (2020): Desember
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jkr.v5i2.22503

Abstract

Tootpaste was a product for dental care to clean, beautify and replace the minerals decay from the dent surface. To prevent the damage of the mineral layers on the surface, added the remineralitation compounds in the formula of the toothpaste. The remineralitation agents commonly add was CaCO3 and CaPO4, during the technological development the calcium compounds added was calcium in nano size like Hydroxyapatite (HAp). In this study produced the contains abrasive HAp and CaCO3 with the mix ratio  CaCO3, 50:50 (HAp:CaCO3) and HAp. The characterization to the toothpaste with CaCO3 abrasive showed the Calcium contains 21,10 ± 0,0577%; dispersibility 936,37 ± 39,42gcm/s; pH 8,3 ± 0,00; and viscosity 25 ± 0,00 P.a. The toothpaste with CaCO3:HAp (50:50) abrasive showed the Calcium contains 27,03 ± 0,0333%; dispersibility 931,93 ± 22,62gcm/s; pH 8,8 ± 0,00; and viscosity 27 ± 0,00 P.a. The toothpaste with HAp abrasive showed the Calcium contains 27,67 ± 0,0882%; dispersibility 987,33 ± 39,50gcm/s; pH 8,9 ± 0,00; and viscosity 27,5 ± 0,00 P.a. The contamination of microbiology did not found in all of the toothpastes along the storage. Based on the entire organoleptic test against the toothpastes, the formula of toothpaste with the mix of CaCO3:HAp was les liked.
SINTESIS DAN KARAKTERISASI MATERIAL FOTOKATALIS HETEROJUNCTION Bi4Ti3O12/SrTiO3 DENGAN METODE SONIKASI Annisa Nur Illahi; Usman Ali Rouf; Hasal Maulidianingtyas; Erna Hastuti; Anton Prasetyo; Vina Nurul Istighfarini
Jurnal Kimia Riset Vol. 5 No. 1 (2020): Juni
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jkr.v5i1.20196

Abstract

Bi4Ti3O12 dan SrTiO3 merupakan material semikonduktor yang berpeluang untuk digunakan sebagai fotokatalis. Namun, kedua material tersebut memiliki kekurangan karena hanya mampu bekerja pada daerah sinar UV dan memiliki laju rekombinasi yang cepat. Pembuatan material heterojunction merupakan salah satu upaya untuk mengatasi masalah ini. Riset ini bertujuan untuk mempelajari sifat fotokatalitik komposit Bi4Ti3O12/SrTiO3 yang disintesis dengan metode sonikasi. Hasil penelitian menunjukkan bahwa Bi4Ti3O12/SrTiO3 berhasil disintesis tanpa adanya pengotor. Mikrograf SEM menunjukkan bahwa Bi4Ti3O12 berbentuk plate-like sedangkan SrTiO3 berbentuk irregular spheres. Data UV-Vis DRS menunjukkan bahwa nilai energi celah pita Bi4Ti3O12/SrTiO3 dengan perbandingan mol (1/1), (1/2), (1/4), dan (1/6) berturut-turut adalah 3,178; 3,70; 3,137, dan 3,160 eV. 
PENGARUH VARIASI JUMLAH BAHAN PENGISI CARBON BLACK TERHADAP SIFAT MEKANIK DAN KARAKTERISTIK KARET ALAM PENGINGAT BENTUK Noor Maryam Setyadewi; Endang Susiani; Efa Radnawati
Jurnal Kimia Riset Vol. 5 No. 2 (2020): Desember
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jkr.v5i2.22475

Abstract

Indonesia memiliki potensi komoditi karet alam yang besar, dengan modifikasi kimia karet alam dapat di design menjadi material pintar seperti halnya polimer sintetik lainnya. Material pintar yang dikembangkan pada penelitian ini adalah material shape memory atau pengingat bentuk. Material pengingat bentuk yaitu material yang memiliki kemampuan mengingat bentuk permanen, diprogram untuk menjadi bentuk tertentu dibawah lingkungan tertentu (seperti suhu dan pH), dan mampu kembali ke bentuk awalnya. Material pengingat bentuk berpotensi untuk diaplikasikan menjadi sensor, aktuator, alat kesehatan maupun spare part alat transportasi. Karet alam pengingat bentuk dibuat dengan metode swelling cross linked vulkanisat karet alam di dalam larutan asam stearat  dengan suhu 75⁰C - 80⁰C dalam waterbath selama 1 jam. Tujuan dari penelitian ini adalah untuk mempelajari pengaruh variasi jumlah bahan pengisi (carbon black filler) pada 5 sampel (C1, C2, C3, C4, C5) terhadap sifat mekanik dan parameter pengingat bentuk. Hasil pengujian kuat tarik menunjukkan vulkanisat blanko memiliki kecenderungan nilai kuat tarik yang lebih tinggi dibandingkan vulkanisat yang mengalami treatment dengan asam stearat. Nilai shape recovery vulkanisat karet alam pengingat bentuk berkisar 76,9- 95,8% dan nilai shape fixity sebesar 14,8-26,1%.
Pengaruh Variasi Konsentrasi Urea Terhadap Fotoaktivitas Material Fotokatalis N/TiO2 Untuk Penjernihan Limbah Batik Tenun Ikat Kediri Aulia Dewi Rosanti; Anggita R.K Wardani; Eva Umi Latifah
Jurnal Kimia Riset Vol. 5 No. 1 (2020): Juni
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jkr.v5i1.18169

Abstract

ABSTRAKFotokatalis merupakan suatu proses transformasi senyawa kimia yang dibantu oleh adanya material katalis dan cahaya. Teknologi fotokatalis sering digunakan untuk mengolah air polutan maupun limbah tekstil. Industri tenun ikat di Bandar Kidul, Kediri menggunakan pewarna sintesis sehingga menghasilkan limbah pewarna yang dapat mencemari lingkungan. Pada penelitian ini telah disintesis N/TiO2 menggunakan metode wet impregnation (impregnasi basah) untuk menjernihkan limbah batik tenun Kediri. Sintesis dilakukan dengan mereaksikan TiO2 yang dilarutkan ke dalam Aqua DM dan urea  dengan variasi konsentrasi 1;2;3;4;5 %(b/b)(N/Ti). Berdasarkan hasil karakterisasi diketahui bahwa semakin besar konsentrasi urea yang ditambahkan, material N/TiO2 yang dihasilkan memiliki ukuran kristal dan band gap(Eg) yang semakin kecil. Selain itu, permukaan yang dihasilkan pada N/TiO2 5% lebih teratur atau homogen apabila dibandingkan dengan TiO2 undoped.. Berdasarkan hasil uji aktifitas fotokatalis N/TiO2 terhadap limbah batik tenun diketahui bahwa material katalis dengan hasil limbah paling jernih adalah material dengan konsentrasi urea paling besar, yaitu N/TiO2 5%. Hal ini menunjukkan bahwa semakin besar konsentrasi yang ditambahkan maka fotoaktivitas yang dihasilkan akan semakin besar Kata Kunci: Fotokatalis;TiO2;N/TiO2; Limbah batik tenun ikat. ABSTRACTPhotocatalyst is a process transformation of chemical compounds under UV irradiation in the presence of catalyst material. Photocatalyst technology is often used to treat pollutant water or textile waste. Tenun ikat industry in Bandar Kidul Kediri uses synthetic dyes so it produce dye waste which can pollute the environment. The effect of variations of concentration of urea on synthesis of N/TiO2 material by wet impregnation  in order to purify the batik weaving waste in Kediri had been studied. The synthesis of N/TiO2 was done by mixing TiO2 in aqua DM and urea with the variation of concentration 1,2,3,4 and 5% (w/w) (N/Ti). Based on the characterization results, it is known that the more concentration of urea added, the N/TiO2 material has a smaller crystal size and a smaller band gap (Eg). In addition, the surface produced at N/TiO2 5% is more even or homogeneous when compared to undoped TiO2. Based on the results of the N/TiO2 photocatalyst activity test on woven batik waste, it is known that the catalyst material with the clearest waste results is the material with the highest urea concentration, which is  N/TiO2 5%. This shows that the more concentration added the greater the photoactivity produced. Key words: Photocatalyst;TiO2; N/TiO2; woven batik waste.
Sintesis dan Karakterisasi Carbon Nanotube (CNt) dari Arang Kayu Jati serta Pemanfaatannya Sebagai Bahan Aktif Antibakteri Agung Rimayanto Gintu; Dhanang Puspita
Jurnal Kimia Riset Vol. 5 No. 2 (2020): Desember
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jkr.v5i2.22505

Abstract

Carbone Nanotube (CNt) was one of antibacterial compound synthesized from carbon pr activated carbon. In this study threated the synthesis of CNt from teak charcoal used strong acid and sonication. The rendement of CNt synthesis showed potential result 37,6555±0,8038%. The characterization to the CNt showed density 1,0145±0,0037g/cc; Absolute Viscosity 1,06±0,0245P.a; Molecule weight 0,0007±0,00002g/mol. Threated the metal ionic doped to the CNt solution used Ag, Cu, Fe(II), Fe(III). Mg and Zn to increase the stabilitation and interaction. The characterization of CNt-Ag showed density 1,0072±0,0055g/cc; Absolute Viscosity 0,66±0,0400P.a; Molecule weight 0,0007±0,00004g/mol. The characterization of CNt-Cu showed density 1,0086±0,0040g/cc; Absolute Viscosity 0,56±0,0400P.a; Molecule weight 0,0007±0,00003g/mol. The characterization of CNt-Fe(II) showed density 1,0060±0,0013g/cc; Absolute Viscosity 0,76±0,0400P.a; Molecule weight 0,0007±0,000001g/mol. The characterization of CNt-Fe(III) showed density 1,0159±0,0042g/cc; Absolyte Viscosity 0,82±0,0200P.a; Molecule weight 0,0007±0,00003g/mol. Characterization of CNt-Mg showed density 0,9970±0,0008g/cc; Absolute Viscosity 0,64±0,0400P.a; Molecule weight 0,0007±0,000005g/mol. Characterization of CNt-Zn showed density 1,0013±0,0013g/cc; Absolute Viscosity 0,60±0,0447P.a; Molecule weight 0,0007±0,000005g/mol. Threated the mix to the CNt by another antibacterial compounds like Hydroxyapatite (HAp), Chitosan and Nano Chitosan. From the characterization of CNt-HAp obtained density 1,0008±0,0010g/cc; Absolute Viscosity 0,60±0,0316P.a; Molecule weight 0,0007±0,000007g/mol. Characterization CNt-Chitosan obtained density 0,9992±0,0019g/cc; Absolute Viscosity 0,42±0,0200P.a; Molecule weight 0,4343±0,0207g/mol. Characterization CNt-Nano Chitosan obtained density 1,0084±0,0002g/cc; Absolute Viscosity 0,50±0,0316P.a; Molecule weight 0,5170±0,3270g/mol. The results of antibacterial activity measurements against E.coli bacteries showed that all of the threatment to the chars produced the antibacterial activity in middle to strong range.
BIOSORPSI LOGAM BESI (Fe) DALAM MEDIA LIMBAH CAIR ARTIFISIAL MENGGUNAKAN ADSORBEN KULIT PISANG KEPOK (Musa acuminate) Djamilah Arifiyana; Vika Ayu Devianti
Jurnal Kimia Riset Vol. 5 No. 1 (2020): Juni
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jkr.v5i1.20245

Abstract

Limbah kulit pisang Kepok telah digunakan untuk menghasilkan biosorben melalui proses yang ramah lingkungan. Limbah kulit pisang Kepok dipotong, dicuci, dikeringkan, dihaluskan dan digunakan sebagai biosorben terhadap logam besi. Penentuan konsentrasi logam besi terhadap proses adsorpsi menggunakan spektroskopi serapan atom. Adsorpsi ion besi terhadap adsorben kulit pisang Kepok menggunakan parameter waktu kontak dan pH. Waktu kontak 30 menit dan pH 6 merupakan kondisi yang sesuai untuk adsorpsi besi. Persentase adsorpsi dan kapasitas adsorpsi yang diperoleh berturut-turut sebesar 86,387% dan 1,44 mg/g. Hasil penelitian menunjukkan bahwa kulit pisang Kepok, sebagai limbah pertanian dan limbah industri rumahan, sangat berpotensi sebagai adsorben untuk menghilangkan logam beracun seperti besi dalam air.

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