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All Journal Jurnal Zeolit Indonesia Indonesian Journal of Pure and Applied Chemistry AR-RAZI Jurnal Ilmiah Jurnal Ilmiah Berkala: Sains dan Terapan Kimia
Nelly Wahyuni
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education

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HYDROLYSIS OF CLAY FROM CAPKALA WITH VARIATION OF CHLORIDE ACID CONCENTRATIONS Nelly Wahyuni; Imelda H. S.; Yateman Arryanto; Sutarno Sutarno; Ya' Zupriadi
Jurnal Zeolit Indonesia Vol. 7 No. 1 (2008)
Publisher : Jurnal Zeolit Indonesia

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Abstract

Hydrolysis of clay from Capkala with variation of chloride acid concentratios has been done. Hydrolysis of clay has been conducted by reacting clay in HCl with stirring during 24 hours. Hydrolysis was conducted in several variations of HCl concentration at room temperature. Hydrolyzed clay was characterized by the Atomic Absorption Spectophotometer, Infrared Spectophotometer, and X-ray Diffractometer. The analysis of Spectophotometer of Atomic Absorption was not showed the decreasing of aluminum content of hydrolized clay which is not the extrication of aluminum metal from clay structure. Infrared spectra from hydrolized clay was not showed the eliminated of absorption peak for Al-OH bonds in octahedral layer. Diffractograms of hydrolized clay was not showed the changing angle of 2θ but figuring the increase of intensity of diffraction peak which indicates discharge of pollutant metals from clay structure.
MODIFIKASI KAOLIN DENGAN SURFAKTAN BENZALKONIUM KLORIDA DAN KARAKTERISASINYA MENGGUNAKAN SPEKTROFOTOMETER INFRA MERAH Nelly Wahyuni
Jurnal Sains dan Terapan Kimia Vol 4, No 1 (2010)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (699.673 KB) | DOI: 10.20527/jstk.v4i1.2042

Abstract

Modifikasi kaolin Capkala dengan surfaktan benzalkonium klorida telah dilakukan dengan mereaksikan kaolin dalam surfaktan selama 8 jam dengan pengadukan pada kecepatan 150 rpm. Modifikasi dilakukan dalam berbagai variasi konsentrasi surfaktan dan suhu aktivasi. Kaolin termodifikasi dikarakterisasi menggunakan Spektrometer Infra Merah. Kaolin termodifikasi menunjukkan adanya serapan C-H simetri dari gugus CH2 yang merupakan indikasi adanya surfaktan pada kaolin. Berdasarkan uji adsorpsi terhadap ion klorida, maka diperoleh kaolin termodifikasi terbaik pada konsentrasi 2,5 x 10-2 M dengan temperatur aktivasi 250 oC dengan persentase ion klorida teradsorpsi sebesar 23,33%. Kata kunci : kaolin, surfaktan, benzalkonium klorida, spektrofotometer infra merah 
POTENSI SENYAWA OKSIDA DARI BLONDO SEBAGAI KATODA BATERAI (POTENCY OF OXIDE COMPOUNDS FROM BLONDO AS BATTERY CATHODE) Indra Amin Jaya; Intan Syahbanu; Nelly Wahyuni
Indonesian Journal of Pure and Applied Chemistry Vol 5, No 3 (2022)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (280.203 KB) | DOI: 10.26418/indonesian.v5i3.59225

Abstract

The limited source of Lithium (Li) as the main material for battery cathodes has become a problem in the development of the new and renewable energy (EBT) sector. Based on their reduction potential and availability on earth, elements that might be suspected include Potassium (K), Sodium (Na), Magnesium (Mg) and Calcium (Ca). All cannot be obtained from natural ingredients, one of which is blondo. Blondo is a by-product of coconut oil processing that has not been used optimally. This study used the calcination process by varying the time (5, 7, 9 hours) and temperature (450, 550, 650°C) to obtain optimal oxide compounds from blondo. Making the cathode using a mixture of blondo and Polvinyl Alcohol (PVA) with a composition ratio of 20:1 attached to a stainless steel plate. Testing the percentage of oxide compounds was carried out using X-Ray Fluorescence (XRF) which showed that the calcination process caused the percentage levels of oxide compounds to increase K2O, P2O5, MgO and Cl. However, when the calcination time and temperature were increased, it did not give a much different effect on the levels of oxide compounds produced previously. The effect of calcination temperature is known from the results of X-Ray Diffraction (XRD) which shows that the higher the calcination temperature, the smaller the crystal size of the oxide compound. At temperatures of 450, 550 and 650°C the yields are 50.0; 47.5 and 36.4 nm. This is also supported by the results of XRF testing where K2O is the most dominant component of the oxide compound in calcined blondo. The test as a cathode material was carried out for three cycles resulting in an average charge capacity of 14.67 mAh, and an average discharge capacity of 5.34 mAh so that the average efficiency was 55.68%.
STUDI DESORPSI Mn2+ DARI KAOLIN TERAKTIVASI ASAM KLORIDA Fiona Aulia; Intan Syahbanu; Nelly Wahyuni
Ar-Razi Jurnal Ilmiah Vol 11, No 2 (2023): Jurnal Ilmiah Ar-razi
Publisher : Universitas Muhammadiyah Pontianak

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29406/ar-r.v11i2.5300

Abstract

Kaolin merupakan salah satu mineral lempung berwarna putih yang ada di Kalimantan Barat khususnya Kecamatan Capkala, Kabupaten Bengkayang. Kaolin banyak dimanfaatkan sebagai adsorben. Tujuan dari Penelitian ini adalah mengetahui pengaruh variasi waktu desorpsi Mn2+ oleh kaolin terlapis Mn2+ dengan pelarut akuades, HCl 0,1 M dan NaOH 0,1 M dan potensi kaolin sebagai material pengemban pupuk lepas lambat. Penelitian ini dilakukan preparasi kaolin, aktivasi kaolin dengan HCl, adsorpsi Mn2+ oleh kaolin teraktivasi HCl dan desorpsi Mn2+ dari kaolin terlapis Mn2+. Preparasi kaolin dilakukan dengan metode sedimentasi dan karakterisasi menggunakan XRD. Hasil XRD mineral yang terkandung pada kaolin yaitu kaolinit 68,9% dan kuarsa 31,1%. Aktivasi kaolin menggunakan HCl bertujuan untuk membuang zat-zat pengotor dan meningkatkan kemampuan adsorpsi kaolin. Kaolin teraktivasi diukur kapasitas tukar kationnya. Kapasitas tukar kation kaolin preparasi sebesar 9,68 cmol.kg-1 dan kaolin aktivasi sebesar 19,24 cmol.kg-1. Selanjutnya MnSO4 diadsorpsi oleh kaolin teraktivasi HCl dan dianalisis menggunakan XRF untuk mengetahui komposisi unsur kaolin. Unsur Mn2+ yang teradsorpsi sebesar 6,93%. Desorpsi kaolin terlapis Mn2+ dilakukan dengan mengaliri masing-masing dengan pelarut yaitu akuades, HCl 0,1 M dan NaOH 0,1 M selama 600 jam dan filtratnya diukur dengan spektrofotometri UV-Vis. Konsentrasi Mn2+ yang terdesorpsi semakin meningkat seiring dengan lama waktu desorpsi. Kaolin memiliki potensi sebagai material lepas lambat karena kaolin terlapis Mn2+ mengalami proses desorpsi atau pelepasan Mn2+ secara bertahap.
Co-Authors Fiona Aulia Holyness Nurdin Singadimedja Imelda H. S. Indra Amin Jaya Intan Syahbanu Intan Syahbanu Ya' Zupriadi Yateman Arryanto