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JURNAL KIMIA SAINS DAN APLIKASI

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Published by Universitas Diponegoro

ISSN : 14108917 EISSN : 25979914 DOI : -

Core Subject : Science, Engineering,

Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering

urnal Kimia Sains dan Aplikasi (p-ISSN: 1410-8917) and e-ISSN: 2597-9914) is published by Department of Chemistry, Diponegoro University. This journal is published four times per year and publishes research, review and short communication in field of Chemistry.

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Articles 796 Documents

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Modifikasi Zeolit Alam Menggunakan Besi (Fe) dan Kobalt (Co) untuk Katalis Degradasi Fenol Marina Adriati; Ahmad Suseno; Taslimah Taslimah
Jurnal Kimia Sains dan Aplikasi Vol 16, No 1 (2013): Volume 16 Issue 1 Year 2013
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Kelimpahan zeolit alam di Indonesia cukup besar sehingga memberikan peluang pemanfaatan di berbagai bidang, salah satunya sebagai bahan katalis. Kemampuan katalis zeolit dapat ditimgkatkan melalui modifikasi zeolit dengan pengembanan logam. Pada penelitian ini telah dilakukan modifikasi zeolit alam melalui pengembanan besi (Fe) dan kobalt (Co) untuk katalis oksidasi fenol. Modifikasi zeolit alam dilakukan melalui tahap pencucian asam menggunakan HF, HCl, dan NH4Cl dilanjutkan pengembanan logam. Karakterisasi produk dilakukan menggunakan x-ray diffraktometer, surface area analyzer, dan uji katalitik dilakukan terhadap sampel fenol. Hasil karakterisasi menunjukkan komposisi mineral komponen utama penyusun zeolit adalah mordenit, keasaman total katalis Fe2O3-zeolit yang diperoleh sebesar 2,7 mmol/g dan katalis CoO-zeolit sebesar 2,5 mmol/g, katalis Fe2O3-zeolit dan katalis CoO-zeolit memiliki luas permukaan spesifik dan volume pori total secara berurutan, yaitu 38,3918 m2/g, 16,6569 cm3/g dan 28,6209 m2/g, 12,5072 cm3/g serta katalis mampu meningkatkan kemampuan hidrogen peroksida (H2O2) dalam mendegradasi fenol sebesar 16,93% pada dosis katalis 5 mg, konsentrasi awal fenol 100 mg/L, volume fenol 20 mL, dan waktu kontak 24 jam.

The Use of Silica Extracted from Kaolin as Catalyst Support for Esterification of 4-Hydroxybenzoic Acid with Sucrose Iman Abdullah; Widayanti Wibowo; Soleh Kosela; Yuni Krisyuningsih Krisnandi
Jurnal Kimia Sains dan Aplikasi Vol 23, No 6 (2020): Volume 23 Issue 6 Year 2020
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

SiO2 was extracted from kaolin using concentrated HCl and HNO3 mixture and used as solid support for both Bronsted (HClO4 and H2SO4) and Lewis Acid (AlCl3 and ZnCl2). Before extraction, kaolin was calcined at 800°C for eight hours to form metastable kaolin. After the extraction procedure, silica was recovered in 51.6% yield. Silica and the resulting solid acids were then characterized using XRD, XRF, and FTIR. XRD pattern shows that silica synthesized from kaolin is in the mixture of amorphous and α-quartz silica. Immobilization of acids alters its structure becomes more crystalline. XRF analysis shows that the loading of AlCl3 and ZnCl2 was 9.5 and 24.8%, respectively. The acid catalysts were then used in the esterification reaction of 4-hydroxybenzoic acid with sucrose. The reactions were conducted in dimethyl sulfoxide (DMSO) solvent by varying reaction time and reaction temperature. The highest conversion of starting materials and selectivity towards ester was obtained over the AlCl3/SiO2 catalyst. DPPH radical scavenging test shows that the ester exhibits good antioxidant activity.

Isolasi dan Identifikasi Senyawa Aktif dari Ekstrak Aseton Rimpang Bangle (Zingiber cassumunar Roxb.) sebagai Antioksidan Ika Rissanti; Enny Fachriyah; Dewi Kusrini
Jurnal Kimia Sains dan Aplikasi Vol 17, No 3 (2014): Volume 17 Issue 3 Year 2014
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Telah dilakukan isolasi dan identifikasi senyawa aktif ekstrak aseton rimpang bangle (Zingiber cassumunar Roxb.) sebagai antioksidan. Isolasi senyawa aktif dilakukan dengan ekstraksi soklet dan kromatografi sedangkan uji aktivitas antioksidan dilakukan dengan metode DPPH. Isolat aktif dianalisis menggunakan spektrofotometer UV-Vis dan pereaksi geser serta FTIR. Berdasarkan hasil analisis tersebut diduga bahwa isolat aktif adalah senyawa flavonoid golongan auron yang memiliki serapan pada panjang gelombang 260,5 nm (pita II) dan 421,5 nm (pita I), memiliki pola hidroksilasi pada 6,7,3’,4’, dan mengandung gugus fungsi OH, CO fenol, CO eter, C=O keton, C=C alkena, C=C dan =CH aromatik, serta benzena tersubstitusi sehingga diduga sebagai senyawa 6,7,3’,4’tetrahidroksiauron (Maritimetin). Uji aktivitas antioksidan terhadap ekstrak aseton menunjukkan harga IC50 sebesar 91,513 ppm sehingga tergolong sebagai antioksidan kuat.

Amplifikasi In Vitro dan In Vivo Fragmen 0,4 KB D-Loop mtDNA Sampel Forensik Asyâ€™ari, Mukhammad; Noer, A. Saifuddin
Jurnal Kimia Sains dan Aplikasi Vol 9, No 2 (2006): Volume 9 Issue 2 Year 2006
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Daerah DNA mitokondria (mtDNA) manusia yang mempunyai tingkat polimorfisme tertinggi adalah D-loop. Urutan nukleotida D-loop mtDNA dapat dijadikan alat untuk menentukan identitas genetik seseorang. Saat ini aplikasinya banyak digunakan untuk memecahkan kasus-kasus di bidang forensik. Isolasi fragmen 0,4 kilobasa (kb) D-loop mtDNA dapat dilakukan dengan mengekstrak mtDNA dari dalam sel, kemudian menggandakan (amplifikasi) mtDNA secara in vitro dengan metoda Polymerase Chain Reaction (PCR) dan secara in vivo dengan metoda Kloning. Pada penelitian ini telah berhasil diamplifikasi secara in vitro fragmen 0,4 kb mtDNA sampel forensik dengan metoda PCR menggunakan primer M1 (5â€™CACCATTAGCACCCAAAGCT-3â€™) dan M2 (5â€™GATTTCAC GGAGGATGGTG-3â€™) dan secara in vivo dengan metoda kloning menggunakan vektor pGEM-T dalam sel inang Eschericia coli JM 109. Identifikasi hasil PCR dilakukan dengan metoda elektroforesis gel agarosa 1% menggunakan pewarna fluorisen Etidium Bromida. Sedangkan sel rekombinan hasil kloning diseleksi menggunakan media selektif mengandung antibiotik ampisilin dan zat pewarna kultur rekombinan yaitu X-gal dan IPTG sebagai indusernya. Identifikasi plasmid rekombinan yang mengandung fragmen 0,4 kb D-loop mtDNA dilakukan menggunakan enzim restriksi Pst I. Hasil kloning diperoleh jumlah koloni putih (sel rekombinan) : biru (sel non rekombinan) adalah 2 : 1. Hasil analisis restriksi enzim PstI pada plasmid rekombinan diperoleh fragmen berukuran 3,4 kb, hal ini menunjukkan bahwa DNA insert berukuran 0,4 kb sesuai dengan fragmen mtDNA hasil PCR. Plasmid rekombinan selanjutnya digunakan pada penelitian berikutnya, yaitu penentuan urutan nukleotida dengan metode sekuensing sehingga dapat diketahui identitas genetika dari sampel forensik yang dianalisis.

Potential Oxidative Treatment Using Pb-PbO2 Electrode in Electrodecolorizing Batik Wastewater Didik Setiyo Widodo; Rahmad Nuryanto; Abdul Haris; Prihastuti Santini Laksmi Dewi; Lutfia Apipah
Jurnal Kimia Sains dan Aplikasi Vol 21, No 3 (2018): Volume 21 Issue 3 Year 2018
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Electrodecolorization of batik wastewater has been done. Study was performed to remediate aquatic environment containing dyes of batik industry by electrolysis, decreasing COD and some metal ions as well. Research was conducted by electrolyzing sample from Buaran Pekalongan and Semarang using Pb and PbO2 as electrodes at a constant applied potential. Solution after treating were analysed, zeolite sieving treatment, and final analysis by UV-Vis spectrophotometer for measuring decolorization percentages, atomic absorption spectrophotometerer (AAS) for evaluating metal ions of Cu2+, total Fe and Na+, and COD analysis. Results show that electrolysis of batik wastewater using PbO2 as anode effectively decolorize and decreasing COD values. Sample containing indigozol and remazol black B (RBB) were decolorized up to 100%. CODs were reduced to 98.6% and 95.4%, respectively. Zeolite treatment enhancing water quality by reducing ion concentration of Cu2+, total Fe ions and Na+.

Pengaruh Variasi Waktu Hidrotermal terhadap Sintesis dan Karakterisasi Nanokristal Zeolit A dari Abu Sekam Padi Pungki Hanipa; Pardoyo Pardoyo; Taslimah Taslimah; Arnelli Arnelli; Yayuk Astuti
Jurnal Kimia Sains dan Aplikasi Vol 20, No 2 (2017): Volume 20 Issue 2 Year 2017
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Sekam padi merupakan salah satu produk samping dari penggilingan padi. Silika amorf hasil ektraksi dari sekam padi dapat di manfaatkan untuk pembuatan zeolit. Penelitian ini bertujuan untuk memperoleh nanokristal zeolit A dari abu sekam padi dan menentukan karakter dari produk nanokristal zeolit A hasil sintesis. Hasil dari penelitian ini adalah diperoleh zeolit berupa serbuk putih menggunakan metode hidrotermal dengan variasi waktu hidrotermal selama 1, 2, dan 3 hari. Analisis menggunakan XRD menunjukkan bahwa ketiga zeolit hasil sintesis merupakan zeolit A dengan ukuran bulir kristal semakin menurun dengan bertambahnya waktu hidrotermal di mana masing- masing ukurannya adalah 34,321; 34,21; dan 34,144nm dan puncak utama berada pada 2theta 21°, 23°, 27°, 29° dan 34°. Analisis morfologi permukaan zeolit sintesis menunjukkan ketiga zeolit sintesis memiliki morfologi permukaan berupa kubus.

Synthesis of Zeolite from Sugar Cane as Detergent Builder: Variation of Si/Al Ratio and Hydrothermal TimeSynthesis of Zeolite from Sugar Cane as Detergent Builder: Variation of Si/Al Ratio and Hydrothermal Time Arnelli Arnelli; Noor Afifah; Narita Rizki; Tri Windarti; Yayuk Astuti
Jurnal Kimia Sains dan Aplikasi Vol 21, No 1 (2018): Volume 21 Issue 1 Year 2018
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Synthesis of zeolite from bagasse with variation of Si / Al ratio (1,2,1,4,1,6 and 1,8) with ZS1-ZS5 code and hydrothermal time (160, 190, 250, 340, and 460 minutes) with sample code ZSa - ZSe has been conducted. The synthesized zeolite was then applied to the detergent builder. The detergent builder of synthetic zeolite was used as a substitute for sodium tripolyphosphate, which is not environmentally friendly as it can lead to eutrophication. One of the detergent builder functions is to improve the washing efficiency of the surfactant by inactivating water-absorbing minerals (Ca2+ and Mg2+ ions) which may further deter the detergency process. Zeolites were synthesized using a sol-gel method followed by a hydrothermal process. The material used in this synthesis is Na2SiO3 (aq) (derived from bagasse) mixed with NaAl(OH)4 (aq), then stirred to form a white gel and continued by heating using autoclave at 100°C. The results obtained are zeolite-A and zeolt-X for variation of Si/Al ratio and hydrothermal time variation, with CEC value and detergency proportional to Si/Al ratio and hydrothermal time.

Sintesis Metil Eugenol dan Benzil Eugenol dari Minyak Daun Cengkeh Ngadiwiyana, Ngadiwiyana; Ismiyarto, Ismiyarto
Jurnal Kimia Sains dan Aplikasi Vol 7, No 3 (2004): Volume 7 Issue 3 Year 2004
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Eugenol merupakan komponen utama minyak daun cengkeh dan biasa digunakan sebagai obat sakit gigi, demam dan penyusun minyak wangi. Pengembangan eugenol mulai banyak dilakukan, khususnya membuat senyawa turunannya. Salah satunya dengan melakukan reaksi alkilasi terhadap gugus hidroksil. Dalam penelitian ini, alkilasi eugenol dilakukan melalui dua tahap yaitu dengan membuat garam eugenolat melalui reaks antara eugenol dengan NaOH dan dilanjutkan reaksi garam eugenolat dengan metil iodida dan benzil klorida. Hasil-hasil reaksi dipisahkan dan dianalisis menggunakan spektroskopi IR dan kromatografi gas-spektroskopi massa. Hasil reaksi berupa larutan berwarna kuning dengan rendemen metileugenol dan benzileugenol masing-masing 53 % dan 47 %.

Uji Sitotoksik Ekstrak dan Fraksi Dendrophtoe pentandra (L) Miq pada sel T47D Masayu Farah Diba; Salni Salni; Subandrate Subandrate
Jurnal Kimia Sains dan Aplikasi Vol 22, No 3 (2019): Volume 22 Issue 3 Year 2019
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Indonesia has a variety of plants that have the potential for medicine. One of the plants used by the community as a drug with anticancer effects is Dendrophtoe petandra (L.) Miq. This study aims to determine the cytotoxic effect of ethanol extract, ethyl acetate fraction and water ethanol fraction of Dendrophtoe petandra (L.) Miq on T47D breast cancer cells. The cytotoxic effects of ethanol extract, ethyl acetate fraction and water ethanol fraction were carried out by MTT assay method using series concentration. Cytotoxic effects were assessed by calculating IC50 values using linear equations. Phytochemical test showed that Dendrophtoe petandra (L.) Miq contained saponins, terpenoids, flavonoids and tannins. The IC50 value of the ethanol extract, ethyl acetate fraction and water ethanol fraction were 417.506 μg/mL, 233.617 μg/mL, and 2748.357 μg/mL, respectively. The smaller the IC50 value means that the compound is more active. Water ethanol fraction of Dendrophtoe petandra (L.) Miq does not have a cytotoxic effect, whereas ethanol extract and ethyl acetate fraction of Dendrophtoe petandra (L.) Miq have cytotoxic effects in the medium strength category. The content of flavonoids and saponins in ethanol extract and ethyl acetate fraction of Dendrophtoe petandra (L.) Miq is thought to play role in causing T47D cell death. Cytotoxic effects of ethyl acetate fraction are stronger than ethanol extracts.

Pengaruh Ligan NH3 pada Pengambilan Logam Tembaga dari Serpihan Sisa Produksi Kuningan Kabupaten Pati Secara Elektrolisis Santi Hermayanti; Didik Setiyo Widodo; Rum Hastuti
Jurnal Kimia Sains dan Aplikasi Vol 14, No 2 (2011): Volume 14 Issue 2 Year 2011
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Telah dilakukan penelitian tentang pengaruh ligan NH3 pada pengambilan logam tembaga dari serpihan sisa produksi kuningan Kabupaten Pati secara elektrolisis. Serpihan sisa produksi kuningan mengandung logam mayor yakni tembaga(Cu), seng(Zn), dan logam minor yakni Timbal(Pb), dan Timah (Sn). Penambahan ligan tertentu dapat meningkatkan kuantitas dan kualitas endapan. Penelitian ini meliputi 3 langkah, yaitu destruksi serpihan sisa produksi kuningan, elektrolisis dan analisis dengan AAS. Larutan elektrolit yang digunakan adalah larutan hasil destruksi serpihan kuningan yang diencerkan 1000 kali. Variabel penelitian ini adalah waktu elektrolisis yaitu 30, 60, 90, dan 120 menit pada sampel tanpa dan dengan penambahan NH3. Hasil penelitian menunjukkan bahwa berat endapan 19,54 mg tanpa ligan NH3 dan 20,58 mg dengan ligan NH3 pada waktu elektrolisis 120 menit. Kemurnian endapan tembaga pada waktu elektrolisis 30 menit pada sampel tanpa penambahan NH3 adalah 62,80% dan dengan penambahan NH3 72,46%.

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