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All Journal CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Jurnal Kimia (Journal of Chemistry) International Journal of Biosciences and Biotechnology Jurnal Veteriner Jurnal Energi Dan Manufaktur Jurnal Pendidikan Fisika Indonesia The Journal of Pure and Applied Chemistry Research Jurnal Kimia Mulawarman Journal of Science and Applicative Technology ALCHEMY Jurnal Penelitian Kimia Nata Palemahan: Journal of Environmental Engineering Innovations
Manuntun Manurung
Program Studi Kimia, Fakultas MIPA Universitas Udayana, Bali-Indonesia
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics Veterinary

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SINTESIS DAN KARAKTERISASI SIFAT FISIK DAN KIMIA KATALIS BENTONIT-ZnO I. A. G. Widihati; M. Manurung; N. G. A. D. A. Suastuti; N. P. A. J. S. Putri
Jurnal Kimia (Journal of Chemistry) Vol. 16, No.2, Juli 2022
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JCHEM.2022.v16.i02.p13

Abstract

Pemanfaatan lempung bentonit sebagai katalis telah dilaporkan oleh banyak peneliti. Aktivitas katalitik lempung umumnya tidak begitu tinggi. Oleh sebab itu, lempung harus dimodifikasi terlebih dahulu sebelum digunakan. Sintesis dan karakterisasi lempung termodifikasi ZnO (Bentonit-ZnO) telah dilakukan. Penelitian ini bertujuan untuk mengetahui sifat fisik dan kimia dari modifikasi lempung oleh ZnO. Bentonit dipreparasi terlebih dahulu kemudian diinterkalasi dengan ZnO yang diharapkan dapat membentuk pilar. Bentonit-ZnO yang telah tersintesis dikarakterisasi sesuai dengan manfaat Bentonit-ZnO sebagai katalis menggunakan Difraksi Sinar X, SEM-EDS, FTIR, luas permukaan dengan metode adsorpsi Methylene Blue dan situs asam permukaan dengan metode titrasi asam-basa. Hasil karakterisasi menunjukkan bahwa interkalasi ZnO ke dalam bentonit tidak meningkatkan jarak antar lapis, permukaan katalis menjadi lebih homogen serta adanya peningkatan jumlah unsur Zn, munculnya pita-pita serapan pada daerah 3600; 1600 – 1650; 2900-2850 dan 450 cm-1 yang mengidentifikasi karakteristik gugus fungsi dari Bentonit-ZnO, serta luas permukaan dan situs asam berturut-turut sebesar 46,357 m2/g dan 5,887 x 1022 situs/g. Kata kunci: bentonit, katalis, karakterisasi, terpilar, ZnO. ABSTRACT The use of bentonite clay as a catalyst has been reported by many studies. The catalytic activity of clays is generally not very high. Therefore, the clay must be modified before use. Synthesis and characterization of ZnO (Bentonite-ZnO) modified clay was carried out. This study aimed to determine the physical and chemical properties of modified Bentonite with ZnO. Bentonite was dipped first and then intercalated with ZnO which was expected to form pillars. The synthesized Bentonite-ZnO was characterized according to the benefits of Bentonite-ZnO as a catalyst using X-Ray Diffraction, SEM-EDS, FTIR, surface area using Methylene Blue adsorption method, and surface acid sites using an acid-base titration method. The characterization results showed that the intercalation of ZnO into bentonite did not increase the distance between layers, the catalyst became more homogeneous and there was an increase in the number of Zn elements, the appearance of absorption bands in the 3600; 1600 – 1650; 2900-2850 and 450 cm-1 regions which identified the functional group characteristics of Bentonite-ZnO and surface area and acid sites of 46.357 m2/g and 5.887 x 1022 sites/g, respectively. Keywords: bentonite, catalyst, characterization, pillared, ZnO.
ARANG AKTIF SERAT SABUT KELAPA DAN APLIKASINYA SEBAGAI ADSORBEN ION KROMIUM(III) DARI LARUTAN AIR Manuntun Manurung; Widihati Widihati; I.A.G. Yunilawati
Journal of Science and Applicative Technology Vol 6 No 2 (2022): Journal of Science and Applicative Technology December Chapter
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35472/jsat.v6i2.1003

Abstract

The coconut husk contains high cellulose, so it can be processed as a basic materials to make activated charcoal. The purpose of the study was to make activated charcoal from coconut husk fiber with hydrochloric acid activator and to determine the effect of changing coconut husk fiber into charcoal, as well as activation of the adsorption power of Cr(III) metal ions from solution. The research started by separating the coconut husk fiber, carbonization at various temperatures. The resulting charcoal was characterized according to SNI 06-3730-1995. The best quality charcoal was activated with HCl, then coconut husk fiber, unactivated and activated charcoals were applied to absorb Cr(III) ions. Optimization of adsorption parameters such as contact time, solution pH, temperature and adsorption isotherm were also studied. The results showed that the optimum carbonization temperature was 600oC, contact time was 5 hours, optimum pH was 6, room temperature. The adsorption capacity of Cr(III) ions were 8.2580 mg/g, 13.5645 mg/g and 16.1452 mg/g for coconut husk fiber, unactivated and activated charcoal, respectively. The increase in adsorption power from coconut husk fiber to charcoal was 64.36% and from charcoal to activated charcoal increased by 19.02%. Coconut husk fiber and unactivated charcoal followed the Langmuir isotherm while activated charcoal followed Freundlich.
KONSENTRASI LOGAM Pb DAN Cd DALAM BUAH JERUK SERTA BIOAVAILABILITASNYA DALAM TANAH PERKEBUNAN JERUK DI DAERAH KINTAMANI I M. Siaka; N. K. Ermin; M. Manurung
Jurnal Kimia (Journal of Chemistry) Vol. 17, No.1, Januari 2023
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JCHEM.2023.v17.i01.p02

Abstract

Kintamani dikenal sebagai pusat penghasil buah jeruk siam di Bali. Berbagai usaha dilakukan oleh para petani untuk meningkatkan produksi buah jeruk siam tersebut, salah satunya adalah dengan mengaplikasikan agrokimia. Akan tetapi, penggunaan agrokimia secara intensif tanpa kontrol yang memadai, dapat meningkatkan kandungan logam-logam berat dalam tanah pertanian, seperti yang telah dilaporkan oleh beberapa peneliti. Keadaan ini tentu dapat juga terjadi pada tanah perkebunan jeruk di Daerah Kintamani-Bali. Penelitian ini bertujuan untuk menentukan konsentrasi logam Pb dan Cd total dalam tanah dan buah jeruk siam serta tingkat bioavailabilitas logam berat tersebut dalam tanah perkebunan jeruk di Daerah Kintamani. Metode ekstraksi bertahap digunakan untuk penentuan konsentrasi logam total Pb dan Cd serta bioavailabilitasnya. Hasil penelitian menunjukkan bahwa konsentrasi Pb dan Cd total dalam tanah sebelum tanaman jeruk berbunga berturut-turut pada kisaran 344,0007-381,4229 mg/kg dan 3,6400-5,3236 mg/kg. Akan tetapi, konsentrasi logam Pb dalam tanah saat panen jeruk mengalami kenaikan menjadi 498,8548-514,3733 mg/kg, sedangkan logam Cd mengalami penurunan menjadi 2,7658-3,4094 mg/kg. Dalam buah jeruk ditemukan bahwa konsentrasi logam Pb dan Cd berturut-turut: 18,3048-24,2205 mg/kg dan 12,3983-15,9922 mg/kg. Konsentrasi ini melebihi ambang batas menurut Peraturan BPOM No. 5 Tahun 2018. Bioavailabilitas logam Pb pada tanah sebelum tanaman jeruk berbunga di setiap lahan sebagian besar berpotensi bioavailable dengan persentase rata-rata sebesar 49,35%. Berbeda dengan Pb, bioavailabilitas logam Cd yang ditemukan dalam tanah di lahan 1 dan 3 adalah Cd yang bioavailable yaitu sebesar 43,57% dan 39,09%, sedangkan di lahan 2 adalah non bioavailable dengan persentase sebesar 41,33%. Kata Kunci: bioavailabilitas, jeruk siam, logam berat. ABSTRACT Kintamani is known as the center of Siamese citrus production in Bali. Various efforts have been made by farmers to increase the production of Siamese citrus fruits, one of which is by applying agrochemicals. However, intensive use of agrochemicals without adequate control can increase the content of heavy metals in agricultural soils, as has been reported by several researchers. This situation can certainly also occur in the soil of citrus plantations in the area of Kintamani-Bali. This study aimed to determine the concentration of total Pb and Cd metals in the soil and citrus fruits as well as the level of bioavailability of these heavy metals in the soil. The sequential extraction method was used to determine the total metal concentrations of Pb and Cd and their bioavailability. The results showed that the total Pb and Cd concentrations in the soil before flowering citrus plants were in the range of 344,0007-381,4229 mg/kg and 3,6400-5,3236 mg/kg, respectively. However, the concentration of Pb in the soil during citrus harvest increased to 498,8548-514,3733 mg/kg, while Cd decreased to 2,7658-3,4094 mg/kg. In citrus fruits, it was found that the concentrations of Pb and Cd were 18,3048-24,2205 mg/kg and 12,3983-15,9922 mg/kg, respectively. This concentration exceeds the maximum allowed according to BPOM Regulation No. 5 of 2018. The bioavailability of Pb in the soil before the citrus plants flowered in each field was potentially bioavailable with an average percentage of 49,35%. In contrast to Pb, the bioavailability of Cd found in the soil of fields 1 and 3 was Cd which was bioavailable, with an average of 43,57% and 39,09%, while in field 2 it was non-bioavailable with a percentage of 41,33%. Keywords: bioavailability, heavy metals, siamese citrus.
Activated Bamboo Charcoal by ZnCl2 as Remazol Yellow FG Adsorbent: Isotherm, Kinetic, and Thermodynamic Studies Manurung, Manuntun; Suaniti, Ni Made; Ratnayani, Oka
The Journal of Pure and Applied Chemistry Research Vol. 13 No. 2 (2024): Edition May-August 2024
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2024.013.02.3311

Abstract

The aim of this study was to determine the isotherm, kinetics, and thermodynamics of remazol yellow FG dye adsorption by ZnCl2-activated bamboo charcoal. The research was started by making charcoal from bamboo stems, then the quality was checked against SNI. Adsorption isotherms were tested against Langmuir and Freundlich models. The adsorption kinetics were examined against pseudo-1st and pseudo-2nd orders and thermodynamic parameters were determined by measuring the values of enthalpy (∆Ho), entropy (∆So), and free energy (∆Go). The values of ∆Ho, ∆So, and ∆Go are -29.747 KJ/mol, -93.798 J/mol, and -1.327 KJ/mol respectively. The adsorption of remazol yellow FG by activated bamboo charcoal was spontaneous. Keywords: adsorption, kinetics, chromium, bamboo charcoal, thermodynamics
Karbon dari Bahan Alam sebagai Adsorben Ramah Lingkungan: Potensi, Tantangan, dan Aplikasinya Manurung, Manuntun; Ratnayani, Oka; Ciawi, Yenni
Nata Palemahan: Journal of Environmental Engineering Innovations Vol. 2 No. 1 (2025)
Publisher : Universitas Pendidikan Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38043/natapalemahan.v2i1.6577

Abstract

Karbon dari bahan alam muncul sebagai solusi berkelanjutan untuk mengatasi berbagai jenis polutan dalam air dan udara. Tulisan ini mengulas berbagai aspek penting dari karbon dari bahan alam, mulai dari sumber bahan baku seperti limbah pertanian dan industri pangan, proses pembuatan melalui karbonisasi dan aktivasi, hingga fungsionalisasi untuk meningkatkan afinitas terhadap polutan spesifik. Berbagai aplikasi juga dibahas, termasuk penanganan logam berat, senyawa organik, zat warna sintetis, serta polutan baru seperti obat-obatan dan pestisida. Studi kasus menunjukkan adsorben ini sangat efektif dalam mengolah air limbah industri dan domestik. Namun, implementasi secara luas menghadapi tantangan seperti variabilitas bahan baku, kebutuhan proses aktivasi yang efisien, dan keterbatasan infrastruktur. Dengan pendekatan teknologi hibrida, desentralisasi produksi, dan integrasi dalam ekonomi sirkular, karbon dari bahan alam memiliki potensi besar sebagai alternatif karbon aktif konvensional. Tinjauan ini juga membahas pentingnya penelitian lanjutan dan kebijakan pendukung untuk mendorong pemanfaatan karbon alami sebagai adsorben ramah lingkungan di berbagai skala aplikasi.
Co-Authors A. A. B. Putra A. A. I. S. J. Dewi A. A. Sg. Istri A. Suwandewi Agung Ari Chandra Wibawa Anak Agung Istri Agung Mayun Laksmiwati Anisha Maulinasari Arisma Damayanti D.N. Sinaga Devi Mayangsari Dina Lindawati Purba Emmy Sahara Fikriatun Nurhikmawati H. S. Suyanto Hery Suyanto I Gusti Ayu Putu Yunita Riyastini I Gusti Putu Agus Ferry S.P. I M. Siaka I Made Dira Swantara I Wayan Bandem Adnyana I Wayan Sugiri Adiyasa I. A. Gede Widihati I. A. R. Astiti Asih I. Oktavia I.A.G. Yunilawati Ida Ayu Gede Widihati Irdawati -, Irdawati Irdawati Irdawati Irdhawati Irdhawati Irma Fitria Ayuningtyas Iryanti Eka Suprihatin James Sibarani Kadek Adi Septiawan Kadek Adi Septiawan, Kadek Adi Kadek Dewi Wirmandiyanthi Ketut Gede Dharma Putra Made Hany Anastasia Mariance Thomas Marsela Luruk Bere N. K. Ermin N. P. A. J. S. Putri N. P. N Repli Suandewi2 Nadya Hartasiwi Ni Ayu Putu Tejawati Ni G. A. M. Dwi Adhi Suastuti Ni Luh Putu Widiantini Ni Made Meryana Utari Ni Made Puspawati Ni Made Suaniti Ni Made Yunarsih Ni Putu Ayu Krismayanti Ni Putu Widya Astuti O. Ratnayani Oka Ratnayani Oscar Yonathan Hambiyono P. S. Sihombing Raisyah Anjani Rizgyandhaka Artha Prawira Rizgyandhaka Artha Prawira Sinaga Natalia Declarossy Sri Rahayu Santi Tri Madesa Patadungan Turmuzi Tammi Widihati Widihati Wira Adi Capayanti Y. Setyo Yenni Ciawi Yunilawati Yunilawati