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KARAKTERISTIK LUMPUR LAPINDO DAN FLUKTUASI LOGAM BERAT Pb DAN Cu PADA SUNGAI PORONG DAN ALOO Junawan, Alvin; Rumhayati, Barlah; Ismuyanto, Bambang
Jurnal Sains dan Terapan Kimia Vol 7, No 1 (2013)
Publisher : Jurnal Sains dan Terapan Kimia

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Abstract

Penelitian ini mengkaji karakteristik dan fluktuasi logam berat Pb dan Cu dalam perairan Sungai Aloo dan Sungai Porong. Dalam penelitian ini pengambilan sampel lumpur Lapindo diambil dari 4 lokasi yang berbeda. Berdasarkan analisis karakteristik dari lumpur Lapindo diperoleh parameter fisik berat jenis berkisar 1,25-2,35 (cm.cm-3), dengan kandungan liat dan debu sebesar 34-53% dan 39-46%, dimana tekstur dari lumpur Lapindo merupakan jenis lempung berliat. Untuk parameter kimia diperoleh nilai pH berkisar 6,6-7, KTK sebesar 3,89-35,42 me/100g), logam berat Pb sebesar 0,19-0,34 mg/L, Cu sebesar 0,19-0,85 mg/L, asam humat tidak teridentifikasi, kadar air sebesar 40,41-60,73% dan kandungan total karbon organik 54,75-55,47%. Fluktuasi logam berat Pb dan Cu pada lumpur Lapindo tertinggi terdapat pada lokasi air tawar yaitu SA1, SA2 dan SP1, SP2. Pada Sungai Aloo, fluks logam tertinggi adalah untuk Cu, sedangkan pada Sungai Porong fluks logam tertinggi adalah Pb.Kata kunci : fluktuasi logam berat , lumpur Lapindo
OPTIMASI KONSENTRASI GARAM BISULFIT PADA PENGENDALIAN KUALITAS NIRA KELAPA Indahyanti, Ellya; Kamulyan, Budi; Ismuyanto, Bambang
Jurnal Penelitian Saintek Vol 19, No 1 (2014): April 2014
Publisher : Jurnal Penelitian Saintek

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Garam  bisulfit  merupakan  bahan  tambahan  yang  sering  ditambahkan  dalam  bahan makanan untuk memberikan efek pengawetan. Pada penelitian ini garam bisulfit ditambahkan dalam nira kelapa. Tujuan penelitian ini untuk mempelajari pengaruh penambahan natrium bisulfit terhadap kualitas nira. Parameter uji kualitas nira mencakup pH, kadar gula reduksi dan kadar sukrosa serta dibandingkan laju hidrolisis sukrosa tanpa dan dengan tambahan garam bisulfit.  Kadar gula dianalisis secara volumetri sesuai metoda Lane-Eynon   sedangkan laju hidrolisis diamati secara polarimetri. Hasil yang diperoleh menunjukkan bahwa dengan tambahan bisulfit dalam nira dapat menekan terjadinya reaksi hidrolisis sukrosa.
PEMBUATAN BIOETANOL DENGAN BANTUAN Saccharomyces cerevisiaeDARI GLUKOSA HASIL HIDROLISIS BIJI DURIAN (Durio zibethinus) Minarni, Neni; Ismuyanto, Bambang; Sutrisno, sutrisno
Jurnal Ilmu Kimia Universitas Brawijaya Vol 1, No 1 (2013)
Publisher : Jurusan Kimia, FMIPA Universitas Brawijaya

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Penelitian ini bertujuan untuk membuat bioetanol dari biji durian yang telah dihidrolisis oleh asam klorida. Glukosa hasil hidrolisis difermentasi menjadi etanol dengan bantuan S.cerevisiae dengan variasi pH fermentasi. Kadar etanol yang dihasilkan ditentukan menggunakan metode cawan conway. Berdasarkan penelitian yang telah dilakukan diperoleh kadar glukosa tertinggi dengan hidrolisis menggunakan HCl 4 M pada sirup glukosa sebesar 36400 ppm dan pada cake glukosa sebesar 20100 ppm pada hidrolisis menggunakan 1 M HCl. Dengan konsentrasi substrat glukosa 8000 ppm, kadar etanol tertinggi dihasilkan pada pH fermentasi 4 sebesar 1,61% (v/v).Kata kunci : biji durian, bioetanol, cawan conway, fermentasi, hidrolisis
KINETIKA REAKSI HIDROLISIS PATI BIJI DURIAN (Durio zibethinus Murr.) MENJADI GLUKOSA DENGAN VARIASI TEMPERATUR DAN WAKTU Anugrahini, Sarah Fitria Agung; Ismuyanto, Bambang; Indahyanti, Ellya
Jurnal Ilmu Kimia Universitas Brawijaya Vol 2, No 1 (2013)
Publisher : Jurusan Kimia, FMIPA Universitas Brawijaya

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ABSTRAK Penelitian ini bertujuan untuk mengetahui pengaruh temperatur dan waktu pada proses hidrolisis pati biji durian (Durio zibethinus Murr.) menjadi glukosa serta untuk menentukan kinetika reaksi pada proses hidrolisis tersebut. Proses hidrolisis dilakukan dengan menggunakan katalis HCl 3M. Variasi temperatur yang digunakan yaitu 50 oC dan 70 oC dengan variasi waktu sebesar 30, 60, 90, 120, 150 dan 180 menit. Kadar glukosa larutan hidrolisat kemudian dianalisis menggunakan reagen DNS. Berdasarkan hasil penelitian, dapat diketahui bahwa temperatur dan waktu hidrolisis mempengaruhi kadar glukosa. Semakin tinggi temperatur dan semakin lama waktu hidrolisis maka kadar glukosa larutan hidrolisat semakin meningkat. Kadar glukosa larutan hidrolisat kemudian digunakan untuk menentukan kinetika reaksi hidrolisis. Kinetika reaksi hidrolisis pati biji durian (Durio zibethinus Murr.) menjadi glukosa dapat dinyatakan dengan persamaan: k = 3,593 x 106 . e-10153,812/T M.menit -1 Katakunci: biji durian, glukosa, hidrolisis, kinetika, pati   ABSTRACT   This experiment aim to find out the influence of temperature and time on hydrolysis of durian (Durio zibethinus Murr.) seed starch become glucose and to determine the reaction kinetics of hydrolysis process. Hydrolysis process was conducted by using HCl 3M as catalyst. The temperature varied from 50 oC and 70 oC, while time variation varied from 30, 60, 90, 120, 150 and 180 minutes. Glucose levels of hydrolysate solution was analyzed using DNS reagent. This experiment resulted that temperature and hydrolysis time affected the glucose levels. Increasing of temperature and hydrolysis time produced higher glucose levels of hydrolysate solution. The glucose levels of hydrolysate solution used to determine the reaction kinetics. Reaction kinetics of durian seed hydrolysis become glucose stated with equation: k = 3,593 x 106 . e-10153,812/T M.minutes -1 Keywords: durian seed, glucose, hydrolysis, kinetics, starch
The Effect of Carbon Organic Total and Salinity on The Discharge of Heavy Metals Pb and Cu in Lapindo Mud into The Aloo River Juniawan, Alvin; Rumhayati, Barlah; Ismuyanto, Bambang
The Journal of Pure and Applied Chemistry Research Vol 1, No 1 (2012)
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2012.001.01.105

Abstract

The research attempts to examine the effect of waters salinity and carbon organic total in the Lapindo Mud on the fluctuation of heavy metals Cu and Pb in the waters of Aloo Rivers. Sample is taken from Lapindo Mud from four different locations. Result of the characterization of Lapindo Mud shows that the clay and dust contents are 34-35 % and 39-46 %. Lapindo Mud texture is clay loam. The organic matter in Lapindo Mud is not surely increasing the concentration of heavy metal because there is oxide compound with great contribution to the increase of heavy metal concentration in Lapindo Mud. Result of TOC analysis indicates that the organic carbon ranges from 54.7 % to 55.47 %, Pb rate ranges from 0.27-0.34 mg/L, and Cu rate ranges from 0.83-1.31 mg/L. Indeed, Pb has higher metal flux in salt water at AL from 5x10-5 mg/cm2.hour to 9x10-5 mg/cm2.hour. Cu has higher metal flux in freshwater at SA1 2.3x10-6mg/cm2.hour to 8.71x10-5mg/cm2.hour
Synthesis of Hematite Pigments (alpha-Fe2O3) by Thermal Transformations of FeOOH Khoiroh, Lilik Miftahul; Mardiana, Diah; Sabarudin, Akhmad; Ismuyanto, Bambang
The Journal of Pure and Applied Chemistry Research Vol 2, No 1 (2013)
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2013.002.01.120

Abstract

Synthesis of iron oxide FeOOH from FeCl3, followed by thermal transformation to form red hematite was conducted. The effect of pH and temperature calcinations was studied. The pigment obtained was analyzed by XRD, color reader and scanning electron microscopy (SEM). The structure crystal of pigment at all variation of pH and calcinations temperature were hematite (a-Fe2O3) with good crystallization and  relatively pure. The color of pigment obtained at pH variation were red with maximum value of L * a* at pH 6 while the mean grain size with minimum coefficient of variation was at pH 8 with mean grain size was 0.17 mm. The maximum of calcinations temperature was at 800oC for 3 hour. The resulting pigment was shaped like a spheres.
PENGARUH pH DAN DOSIS KOAGULAN EKSTRAK BIJI KELOR DALAM KOAGULASI TERHADAP PENGURANGAN KEKERUHAN LIMBAH CAIR Herawati, Astrid; Asti, Riistika; Ismuyanto, Bambang; Nanda, Julia; Hidayati, A.S. Dwi Saptati N.
Jurnal Rekayasa Bahan Alam dan Energi Berkelanjutan Vol 1, No 1 (2017)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rbaet.2017.001.01.04

Abstract

The presence of suspended and colloidal particles in water can cause turbidity. To reduce the turbidity, coagulation–flocculation process is commonly used. In this process, the colloidal particle is converted into flocs which easily separated from water with the aid of coagulant. One of the natural coagulants that have been studied as water purifier is Moringa oleifera seeds. This research aims to reduce turbidity of kaolin synthetic wastewater through coagulation–flocculation process using Moringa oleifera seeds that have been extracted with NaCl 1 M. The variables used in this study were wastewater pH (3, 6, 10, and 12) and coagulant dosage (0, 1, 2, 3, 4, and 5 mL/L).  Coagulation-flocculation was taken place in Jar Test with rapid stirring 150 rpm in 2 minutes, followed by slow stirring 30 rpm in 30 minutes, and sedimentation for 30 minutes. Then, the water was analyzed using Turbidimeter. The results showed that coagulant dosage and pH affected the effectiveness of coagulation in decreasing turbidity. The optimum dosage of extracted Moringa oleifera seeds coagulant in coagulation of kaolin synthetic wastewater at pH 3, 6, 10, and 12 were 2 ml/L, 3ml/L, 2 ml/L, and 4 ml/L, respectively.
Potential of Sugar Cane As an Alternative Raw Material for Making Activated Carbons Hidayati, A.S. Dwi Saptati Nur; Kurniawan, Silva; Restu, Nalita Widya; Ismuyanto, Bambang
Natural B Vol 3, No 4 (2016)
Publisher : Natural B

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.natural-b.2016.003.04.8

Abstract

This research studied to utilize the bagasse to be used as activated karbon in particular for the adsorption of Ca2+. The manufacture of activated carbon consists of carbonization dan activation process. Temperature variation for carbonization process in this research are 500°C, 550°C, 600°C, 650°C and 700°C then proceed with the activation process by carbon reflux with 6 M H2SO4 for 4 hours. Carbonization yield will decrease with increasing temperature carbonization. While the ash content, surface area, pore volume, and adsorption capacity of Ca2+ will increase with increasing temperature of carbonization. Obtained activated carbon is best activated karbon made at a temperature of 700°C with an activation carbonization which has a surface area 100.62 m2/g, 22.3750 Å pore diameter, pore volume of 22.376 mL/g, can eliminate the Ca2+ up to 13.26 %.
ADSORPSI ION KALSIUM MENGGUNAKAN BIOMASSA ECENG GONDOK (Eichhornia crassipes) DIREGENERASI HCL Rakhmania, Citra Dewi; Khaeronnisa, Indah; Ismuyanto, Bambang; Nanda, Julia; Himma, Nurul Faiqotul
Jurnal Rekayasa Bahan Alam dan Energi Berkelanjutan Vol 1, No 1 (2017)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rbaet.2017.001.01.03

Abstract

Water hyacinth (Eichhornia crassipes) is known as an aquatic weed that has rapid growth. However, the water hyacinth has the ability to remove metals from water as it acts as a natural adsorbent. Calcium ion is one of the metallic ions which can cause hardness and scaling in high temperature, resulting in a decrease of the efficiency of industrial equipment. In this research, the water hyacinth was regenerated with HCl and used as an adsorbent to adsorb calcium ion. The effect of HCl concentration and calcium ion concentration on the adsorption capacity of calcium ion was investigated. The results show that adsorption capacity of calcium ion increased as the concentration of HCl increased up to 3 M. At higher concentration of HCl, 4 M and 5 M, the adsorption capacity decreased because some functional groups of hydroxyl and carboxyl which play an important role in adsorption process are cleavage. Maximum adsorption capacity was achieved at 38,733 mg Ca/gr adsorbent with regeneration of adsorbent at HCl 3M and 500 ppm of calcium ion
PENGARUH PENAMBAHAN KITOSAN TERHADAP EFEKTIVITAS PROSES KOAGULASI MENGGUNAKAN BESI (III) KLORIDA HEKSAHIDRAT Junisu, Belda Amelia; Handayani, Evi; Hidayati, AS Dwi Saptati Nur; Ismuyanto, Bambang; Himma, Nurul Faiqotul
Jurnal Rekayasa Bahan Alam dan Energi Berkelanjutan Vol 1, No 2 (2017)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rbaet.2017.001.02.04

Abstract

Air gambut merupakan sumber air potensial yang dapat digunakan sebagai air bersih jika diolah terlebih dahulu, dimana penyisihan asam humat menjadi perhatian utama karena kandungannya yang tinggi menyebabkan kekeruhan, intensitas warna yang tinggi, dan sifat asam pada air gambut. Salah satu metode yang dapat digunakan untuk penyisihan asam humat dalam air gambut adalah koagulasi dengan menggunakansenyawa kimia berupa garam logam hidrolisis sebagai koagulan. Pada penelitian ini, Besi (III) Klorida (FeCl3.6H2O) digunakan sebagai koagulan untuk penyisihan asam humat.Penentuan kondisi optimum koagulasi dilakukan dengan variasi pH (6–9) dan dosis koagulan FeCl3.6H2O (20–100 ppm). Koagulasi kemudian dilakukan dengan penambahan kitosan sebagai koagulan pendukung untuk meningkatkan efektivitas proses koagulasi, dimana dosis kitosan divariasikan pada rentang 10–50 ppm.Diperoleh nilai pH optimum adalah pH 7 dan dosis FeCl3.6H2O sebesar 80 ppm dengan penurunan warna sebesar 88,08% dan kekeruhan sebesar 97,08%. Sedangkan dengan adanya penambahan kitosan hingga 50 ppm, penurunan warna dan kekeruhansemakin meningkat hingga  94,75% dan 99,07%.