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All Journal Jurnal Teknologi Industri Pertanian Transmisi: Jurnal Ilmiah Teknik Elektro SAINS DAN MATEMATIKA JURNAL KIMIA SAINS DAN APLIKASI TRANSIENT: Jurnal Ilmiah Teknik Elektro Indonesian Journal of Chemistry Akta Kimia Indonesia Studies in Philosophy of Science and Education Greensphere: Journal of Environmental Chemistry International Journal of Multidisciplinary Sciences JURNAL REKAYASA KIMIA & LINGKUNGAN

Sriatun Sriatun

Chemistry Department, Faculty Of Sciences And Mathematics, Diponegoro University Jl. Prof. Soedarto, SH., Tembalang, Semarang

Author-ID : 385995

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PENINGKATAN KUALITAS PRODUK PERALATAN DAPUR DENGAN ELEKTROPLATING Sumardi, Sumardi; Sriatun, Sriatun
Transmisi Vol 16, No 1 (2014): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Abstrak Ipteks bagi masyarakat ini bekerjasama dengan pengrajin parut industry kecil di daerah Pundungan juwiring, Klaten Jawa Tengah.Â Sebelum ada kegiatan ini para pengrajin parut di daerah tersebut untuk menghasilkan parut dan peralatan dapur lainnya masih menggunakan cara tradisional, yaitu tanpa pelapisan bahan anti korosi. Pada jangka waktu lama produk-produk peralatan tersebut akan berkarat dan penampilan jadi kurang menarik. Oleh karena itu pada kegiatan ipteks bagi masyarakat ini dibuat alat elektroplating untuk melapisi parut dan produk lainnya dengan bahan anti korosi. Bahan anti korosi menngandung logam Sn dan beberapa larutan kimia seperti ZnCl2, KCl, zylite additive dan zylite brigh. Peralatan elektroplating dibuat di Laboratorium Teknik Elektro, sedangkan unjuk kerjanya diujikan pada beberapa sampel untuk mendapatkan kondisi optimal. Selanjutnya alat ini diserahkan kepada pengrajin parut Selain itu juga dilaksanakan pelatihan tentang bagaimana menggunakan dan merawat peralatan tersebut. Dari kegiatan ini diharapkan para pengrajin parut dapat mengoperasikan peralatan dengan baik, merawat dan memperbaiki jika terjadi kerusakan. Kata kunci: parut, elektroplating, pelapisan Â Â Abstract Â This IbM devotion was organized with the craftsman of grate of small industry at Pundungan, Juwiring, Klaten of Central Java (as a partner). Before this devotion the craftsman of grate of small industry at Pundungan, Juwiring, Klaten of Central Java, to produce the grate and other equipment still used traditional methode. This mean, the grate and other tools without coating byÂ anti-corrosive agent. For the longer time the product become rusted andÂ the performance to be ugly. Therefore in IbM devotion had made an electroplating equipment to coated the grate by anti-corosive agent. Anti-corrosive agent consist of Sn metal and some chemicals liquid like ZnCl2, KCl, zylite additive, zylite bright etc. Electroplating equipment was constrtucted at laboratorium of Electrical Engineering, then the performance was tested to some samples to obtained optimal conditions. Finally the electroplating equipment was submitted to the craftsman of grate. Â In addition to administering the equipment, also implemented training on how to use and care it. From this activity was expected the craftsman of grate of small industry could operated the equipment properly, maintained and improved when the damage occurs. Â Key words: grate, electroplating, coating

Adsorption of Indigo Carmine Dye using Cetyltrimethylammonium Bromide (CTAB) Surfactant Modified Zeolite Fauziyah, Nurul; Sriatun, Sriatun; Pardoyo, Pardoyo
JURNAL SAINS DAN MATEMATIKA Volume 23 Issue 4 Year 2015
Publisher : JURNAL SAINS DAN MATEMATIKA

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Research of indigo carmine dye adsorption using natural zeolite modified by cetyltrimethylammonium bromide (CTAB) surfactant has been done. The purpose of this study was to modify the natural zeolite using CTAB surfactant and to determine its ability on the adsorption of indigo carmine dye. The stages of the study included the activation of zeolites, modifying zeolites using CTAB surfactant and adsorption test of indigo carmine dye. The results showed that the zeolites could be modified by CTAB. They were then characterized by the existence of FTIR absorption band at wavelengths of 1404.18 cm-1 and 2800-3000 cm-1. The various concentration of indigo carmine (5, 10, 15, 20 ppm); contact time (15, 30, 45 minutes) and pH (3, 4, 5, 6, 7, 8, 9) were studied and the highest condition was reached at the 45 minutes, pH= 3 and indigo carmine concentration of 20 ppm for 0.5 and 1 mM CTAB (15.35% and 23%) and indigo carmine concentration of 5 ppm for 10 mM CTAB (96.18%). The adsorption of indigo carmine tended to increase with increasing the concentration and contact time and decreased with increasing the pH.

Geochemistry of Three Spots on Stream Water around Gedongsongo Hot Springs Aminin, Agustina L. N.; Suhartana, Suhartana; Sriatun, Sriatun; W., Didik S.
JURNAL SAINS DAN MATEMATIKA Volume 21 Issue 4 Year 2013
Publisher : JURNAL SAINS DAN MATEMATIKA

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Study on the physical characteristics, chemical content of water as well as microbiological composition in the area of â€‹â€‹geothermal hot springs in Gedongsongo have been done. Water samples were collected on the area within streaming water with moderate temperature. The selection was done on the basis of water that will enter into agricultural and residential areas. Water analysis includes physical analysis, such as temperature, water clarity and odor. While the chemical analysis comprised the oxide content of Mg and Ca. Anion analysis was also performed as sulfate, phosphate, bicarbonate and chloride. The microbiological composition performed using SSCP method for community analysis. The results showed a correlation between the temperature and the content of the anions. The higher temperature of water showed the higher level of anions. The existence of the metal oxide is directly proportional to the levels of the anions. The lower acidity of water showed the higher the levels of hydrogen sulfide. Bacterial composition based on SSCP profile showed a slight different of diversity.

PEMASARAN PRODUK KERAJINAN BERBASIS CLOUD MARKETPLACE Sriatun, Sriatun; Arfan, Muhammad; Sumardi, Sumardi
Transient: Jurnal Ilmiah Teknik Elektro TRANSIENT, VOL. 6, NO. 3, SEPTEMBER 2017
Publisher : Universitas Diponegoro

Pengrajin keset dari kain perca di Ceper Klaten Jawa Tengah saat ini sudah mampu memproduksi keset beraneka macam karakter seperti angry bird, keropy, doraemon dan sebagainya, namun pemasarannya masih sangat terbatas sehingga masyarakat luas belum mengenal produk keset dari daerah ini. Selain itu rendahnya kemampuan SDM pengrajin dalam bidang teknologi informasi/internet menyebabkan kendala dalam berinteraksi dengan pihak lain baik konsumen maupun pensuplai bahan baku. Melalui Program IbM/PKM ini diupayakan untuk menerapkan teknologi informasi/internet guna meningkatkan pemasaran produk kerajianan keset dari kain perca melalui cloud marketplace. Penggunaan smartphone terus meningkat dan semakin murah serta dukungan pemerintah pada industri kreatif dengan teknologi digital menjadikan peluang untuk melaksanakan pemasaran secara online semakin mudah.Â Pemasaran melalui cloud marketplace tidak membutuhkan modal yang besar, akses mudah dengan pelayanan penuh (24 jam) pada pelanggan, biaya operasional rendah.Â Melalui metode pemasaran ini kreatifitas dalam mempromosikan dan mengembangkan produk kerajinan lebih terbuka sehingga dapat meningkatkan omzet penjualan.

Sintesis Zeolit A dan Kemungkinan Penggunaannya Sebagai Penukar Kation Sriatun, Sriatun
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

Telah dilakukan sintesis zeolit A dengan menggunakan alumunium hidroksida sebagai sumber alumina dan silikon dioksida sebagai sumber silika. Sintesis dilakukan dengan cara mereaksikan natrium silikat dan na-trium aluminat melalui proses hidrotermal dalam sistem dengan pH 11-12. Karakterisasi produk sintesis dil-akukan dengan menggunakan spektrometer infra merah (IR) dan difraktometer sinar-x (XRD). Dari hasil analisis data IR diperoleh informasi bahwa rasio Si/Al dalam zeolit hasil sintesis adalah tinggi. Uji kualitas kristal (kristalinitas) menunjukkan adanya pergeseran sudut difraksi pada puncak-puncak khas zeolit A, ini mengindikasikan bahwa penataan polihedral sangkar sodalit belum seluruhnya sempurna. Kondisi pH optimum untuk pertukaran kation Ca2 terhadap zeolit hasil sintesis adalah 6.

Impregnasi Nikel Klorida pada Zeolit-Y untuk Katalis Hidrorengkah Minyak Bumi Sriatun, Sriatun
Jurnal Kimia Sains dan Aplikasi Vol 8, No 3 (2005): Volume 8 Issue 3 Year 2005
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Telah dilakukan impregnasi nikel klorida pada zeolite-Y dan penggunaannya untuk katalis hidrorengkah. Zeolit-Y sintetik dimodifikasi dengan menambahkan amonium nitrat 2 M, dan dikalsinasi selama 5 jam pada suhu 450Â°C. Kemudian, produk diimpregnasi dengan nikel klorida dalam etanol. Konsentrasi larutan klorida nikel masing-masing adalah 0,4%, 0,6%, 0,8%, 1,0%, 1,2% dan 1,6%. Karakter Ni/zeolit-Y dan H/zeolit-Y diperoleh dengan mengukur kandungan nikel dan kristalinitas. Pengujian aktivitas katalis dilakukan menggunakan proses hydrorengkah pada suhu 350Â°C dan menggunakan umpan fraksi 150-230Â°C dari minyak mentah Minas. Produk perengkahan cair dianalisis dengan kromatografi gas-spektroskopi massa (GC-MS). Hasil penelitian ini menunjukkan bahwa ada peningkatan kandungan nikel pada H/zeolit-Y setelah proses impregnasi. Dari pengukuran kristalinitas, diketahui bahwa kristalinitas relatif H/zeolit-Y setelah impregnasi menurun sekitar 26 - 28%. Uji aktivitas menunjukkan bahwa Cairan Hasil Perengkahan (CHP) tertinggi sebesar 55% (diisikan Ni 2,51%). Selain itu, kami mendapat informasi bahwa Ni/zeolite-Y dapat mengubah senyawa C13-C23 dari umpan dan menghasilkan fraksi C7-C10 sebagai senyawa baru.

Dealuminasi Zeolit Alam Cipatujah Melalui Penambahan Asam dan Oksidator Sriatun, Sriatun; Darmawan, Adi
Jurnal Kimia Sains dan Aplikasi Vol 8, No 2 (2005): Volume 8 Issue 2 Year 2005
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Sampai saat ini zeolit tetap menjadi primadona sebagai bahan penapis molekuler atau adsorben. Umumnya zeolit alam perlu diberi perlakuan tertentu bila akan digunakan sebagai adsorben, karena rasio Si/Al rendah dan mengandung unsur-unsur pengotor yang harus diminimalkan pengaruhnya. Oleh karena itu perlu dilakukan dealuminasi. Salah satu metode dealuminasi adalah pengasaman dan untuk memaksimalkannya ditambah dengan oksidator KMnO4.Prosedur kerja penelitian ini meliputi dealuminasi zeolit alam Cipatujah menggunakan H2SO4 dan HCl serta ditambah dengan oksidator KMnO4. Selanjutnya dilakukan karakterisasi terhadap zeolit sebelum dan sesudah perlakuan dealuminasi menggunakan spektrofotometer inframerah (IR), difraktometer sinar-x (XRD) dan spektroskopi serapan atom (AAS).Dari hasil interpretasi terhadap data spektra inframerah maupun difraktogram XRD menunjukkan bahwa zeolit alam yang digunakan termasuk jenis mordenit. Dari data penentuan kadar unsur menggunakan AAS diperoleh hasil bahwa pada dealuminasi menggunakan H2SO4 dan KMnO4 mampu menaikkan rasio Si/Al dari 2,852 menjadi 11-12. sedangkan dengan menggunakan HCl rasio Si/Al naik menjadi 9,945.

PEMANFAATAN KATALIS SILIKA ALUMINA DARI BAGASSE PADA PEMBUATAN BIODIESEL DARI MINYAK GORENG SISA PAKAI Sriatun, Taslimah dan Linda Suyati TIP
Jurnal Teknologi Industri Pertanian Vol. 25 No. 1 (2015): Jurnal Teknologi Industri Pertanian
Publisher : Department of Agroindustrial Technology, Bogor Agricultural University

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It was synthesized biodiesel from the used cooking oil using silica alumina catalyst. The aim of this research was to establish the catalytic performance in the form of silica alumina. The silica in sugarcane baggase was extracted by 6 M sodium hydroxide until sodium silicate was obtained. Synthesis of silica alumina catalyst was conducted by reaching sodium silicate with sodium aluminate, whereas the ratio was 1:1 (v/v), then the mixture was hydrothermaly heated at 100oC for 3 days. Catalytic ability was tested on transesterification reaction of used cooking oil and methanol. This catalytic test was to measure the performance of 1% silica alumina in converting used cooking oil into biodiesel. The variables were examined including ratios of methanol:used cooking oil (1:3, 1:6 and 6:1) and contact times (60 and 120 minutes). Catalyst characteristics were determined by XRD, FTIR, SEM-EDX and surface analyzer, meanwhile biodiesel as the product of transesterification was determined by GC-MS. The result showed that the silica alumina catalyst was Na-sodalite that had composition of Na 17.96%, Al 18.97% and Si 17.04%. Na-sodalite had homogenized shapes and sizes which the pore diameter of 4.55 Ao, pore volume of 5.73.10-3cc/g and surface area of 1.457.105cm2/g. The biodiesel obtained at methanol:used cooking oil of 1:3 for 60 minutes was 13.83% consisting of methyl caprylate, methyl caprate, methyl laurate, methyl myristate, methyl palmitate, methyl linoleat and methyl stearate. Whilst at methanol:used cooking oil of 6:1 yielded 85.51% biodiesel with methyl caprate as main component.Keywords:silica alumina, sugar cane bagasse, used cooking oil,biodiesel

Modifikasi Zeolit Alam Menggunakan Trietanolamin (TEA) sebagai Adsorben Ion Logam Kromium (III) Sriatun Sriatun
Akta Kimia Indonesia Vol 5, No 2 (2020)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25493736.v5i2.7807

Pada penelitian ini telah dilakukan modifikasi zeolit alam dengan trietanolamin (ZM-TEA) untuk mengadsorpsi ion logam kromium (Cr) (III). Sampel zeolit alam diaktivasi dengan asam, kemudian direaksikan dengan trietanolamin. Karakterisasi ZTEA menggunakan FTIR dan Gas Sorption Analyzer (GSA). Adsorpsi ion logam Cr (III) oleh ZM-TEA dikaji pada berbagai pH dan konsentrasi. Penentuan konsentrasi menggunakan spektrometer UV-Vis.Data FTIR menunjukkan bilangan gelombang 1404 cm-1 adalah obligasi amina dan 2839-2932 cm-1 vibrasi ulur asimetri dan simetri CH2 dari trietanolamin. Data GSA menunjukkan penurunan luas permukaan, volume dan diameter pori pada ZTEA. Data adsorpsi menunjukkan optimum pada pH 5 serta kemampuan adsorpsi ZM-TEA lebih tinggi dari zeolit alam.

Synthesis of Zeolite from Sugarcane Bagasse Ash Using Cetyltrimethylammonium Bromide as Structure Directing Agent Sriatun Sriatun; Taslimah Taslimah; Linda Suyati
Indonesian Journal of Chemistry Vol 18, No 1 (2018)
Publisher : Universitas Gadjah Mada

The purpose of this research is to synthesize zeolite from sugarcane bagasse ash using cetyltrimethylammonium bromide as structure directing agent. This research used cetyltrimethylammonium bromide surfactant to invent the high porosity, surface area, acidity and thermal stability of synthesized zeolite. The Silica was extracted by alkaline fusion using sodium hydroxide solution. The synthesis was conducted by hydrothermal process at 100 °C for 7 days, ageing process for 24 h and calcination at 500 °C for 5 h. The ratio of Si/Al (v/v) was 1, 15 and 25, meanwhile the concentration of cetyltrimethylammonium bromide was 5x10-4 M, 1x10-3 M and 1x10-2 M. The result showed all of product have strong absorbance at 950–1050 cm-1 and 620–690 cm-1, 420–460 cm-1, double ring at 520–570 cm-1, pore opening at 300–370 cm-1. Vibration of –OH as silanol group or water was indicated by broad absorbance at 3400–3450 cm-1. The diffractograms XRD showed that the product had high crystallinity. The composition of product on ratio Si/Al 1 with concentration of cetyltrimethylammonium 10-2 M is sodalite, the ratio Si/Al 15 and 25 are NaP1 and SiO2 quartz and contain 12.23% and 12.19% of Si, 4.17% and 13.18% of Al, respectively. Observation on SEM revealed that the crystal produced using cetyltrimethylammonium bromide were homogenous and regular in shape.

Co-Authors . Widayat Abdul Haris Adi Darmawan Agi Yulianti Agus Salim Purwanto Agustina L.N. Aminin Alfi Nurlaela Amaryllis Kartika Ratri Anis Komariah Anistyasari, Yeni Arnelli Arnelli Bimo Tunggal Dipowardani Choiril Azmiyawati Damar Nurwahyu Bima Daru Winarti, Daru Dharma Pebruariawan Putra Didik S. W. Dimas Buntarto Ekohariadi Endah Wulan Juni Erwin Nur Cahyo Febriani, Intan Wahyu Fuguh Devi Saputro Hanifa Zakiyatul Urbach Heru Susanto Icha Aisyah Isharyanti, Isharyanti Janitra, Atikah Ayu Karso Karso Khairini Pertiwi Kuwatno Kuwatno Linda Selvianingrum Linda Suyati Madania, Pawitra Marta Chandra Anikke Putri Meini Sondang Sumbawati Muchamad Fadlulah Mukhammad Asy'ari Nasution, Ali Napiah Nor Aida Zubir Novia Mintari Nurul Fauziyah, Nurul Oktaffi Arina Manasikana Pardoyo Pardoyo Reny Ingemer Selvia Rina Nurianingsih Salahuddin Salahuddin Saphira, Hanandita Veda Shabrina Herawati Sholihah Novitasari Sofian Ansori Sri Hartutik Suhartana Suhartana Sumardi . Taslimah Taslimah Taslimah Taslimah Taslimah Taslimah Wuryanti Wuryanti Yanti Sri Rejeki

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