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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
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 | Full PDF (438.378 KB) | 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 | Full PDF (485.127 KB) | 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.
Pemurnian Emas dari Bijih Emas Berkadar Rendah Menggunakan Karbon Aktif dari Arang Tempurung Kelapa Mulyasuryani, Ani; Ismuyanto, Bambang; Purwonugroho, Danar
Jurnal Natur Indonesia Vol 14, No 1 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (57.031 KB) | DOI: 10.31258/jnat.14.1.1-6

Abstract

The activated carbon from the coconut shell can be used as an adsorbent for the recovery of gold. The optimum condition for gold recoverywas obtained at pH 3 (for adsorption) and pH 5 (for desorption) with 1 M thyocyanate solution and a 5 cm length of column (the mass ofactivated carbon is 20 grams). In this condition, the average gold recovery is 90.00%, silver 7.28% and copper 4.93%, that were used severalgold ore samples. The average purity degree of gold is 49.67%, depend on the concentration of gold, silver and copper in the gold oresample.
OPTIMIZATION OF BISULFIT SALT CONCENTRATION ON COCONUT QUALITY CONTROL OF COCONUT Indahyanti, Ellya; Kamulyan, Budi; Ismuyanto, Bambang
Jurnal Penelitian Saintek Vol 19, No 1: April 2014
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1079.327 KB) | DOI: 10.21831/jps.v19i1.2317

Abstract

Bisulphite salt is an additive that usualy added into foodstuff, it was used in order to take a preservation effects. In this research, it was added into coconut sap. The aim of this research was to study the effects of sodium bisulphite adding for increasing coconut sap quality, including pH, reducing sugar and sucrose content. In addition, the rate of sucrose hydrolysis with and without bisulphite have been compared.  The volumetric method, i.e Lane-Eynon procedure was used for determining the sugar contents while the hydrolysis rates were measured by polarimetry. The results showed that bisulphite added into coconut sap could repress sucrose hydrolysis.    
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 | Full PDF (204.911 KB) | 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 | Full PDF (829.47 KB) | 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 | Full PDF (608.667 KB) | 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 | Full PDF (1027.749 KB) | 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%.
Synthesis of Patchouli Biochar Cr2O3 Composite Using Double Acid Oxidators for Paracetamol Adsorption Setianingsih, Tutik; Masruri, Masruri; Ismuyanto, Bambang
The Journal of Pure and Applied Chemistry Research Vol 7, No 1 (2018): Edition January-April 2018
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1273.296 KB) | DOI: 10.21776/ub.jpacr.2018.007.01.367

Abstract

Composite built by patchouli biochar and metal oxide, Cr2O3, is a potential material for remediation of contaminated wasterwater. Oxidation of biochar using acid or salt oxidators can improve its surface polar functional groups. This treatment may be able to increase impregnation of  metal cation (as salt) before calcination to form its oxide. In this research, 3 types of oxidators were used to oxidize the biochar before impregnation with purpose to study its influence toward physichochemistry and adsorption performance of the composite. Preparation of the composite included 3 steps, including preparation of biochar by pyrolisis of patchouli biomass using ZnCl2 activator at 450 oC, oxidation of the biochar using 3 different oxidators (H2SO4-HNO3, H3PO4-HNO3, H2O2–HNO3) at 60 oC,  impregnation of the oxidized biochar using CrCl3 followed by calcination process to form biochar–Cr2O3 composite at 600 oC. Characterization using X-ray diffraction indicated that the composite containes the Cr2O3 structure.  FTIR spectrophotometry characterization indicates the different content of C=O, C-O, and –OH on the composite surface. SEM images shows irregular micro ball shapes. EDX characterization indicates the different Cr content in the composite with same sequence with FTIR absorbances of  both C-O and –OH. Adsorption of paracetamol  indicates effect of Cr2O3 showing the same sequence of both.