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All Journal KOVALEN: Jurnal Riset Kimia
Musafira Musafira
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Chemical Engineering, Chemistry & Bioengineering Chemistry

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KAJIAN AKTIVASI ARANG AKTIF BIJI ASAM JAWA (Tamarindus indica Linn.) MENGGUNAKAN AKTIVATOR H3PO4 PADA PENYERAPAN LOGAM TIMBAL Serli Jayanti; Ni Ketut Sumarni; Musafira Musafira
KOVALEN: Jurnal Riset Kimia Vol. 1 No. 1 (2015)
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

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ABSTRAK Penelitian tentang penyerapan logam Pb menggunakan biji asam sebagai adsorbat telah dilakukan. Metode yang digunakan dalam penelitian ini adalah aktivasi karbon dengan H3PO4 sebagai aktivator. Hal itu dilakukan dengan menerapkan 5 variasi berat ( 1, 2, 3, 4, dan 5 g) dan konsentrasi (1, 2, 3, 4, dan 5 N ). Untuk melihat penyerapani Pb terhadap waktu kontak, maka 5 variasi waktu kontak telah diterapkan yaitu dari 10, 20, 30, 40, dan 50 menit. Hasil penelitian menunjukkan bahwa karbon aktif mempunyai kapasitas adsorpsi terbaik (89,59 ppm) pada berat 5 gram , sementara waktu kontak optimum dicapai pada 50 menit dengan 69,02 ppm dari Pb yang terserap. Aktivasi karbon aktif dengan H3PO4 pada konsentrasi optimum  2 N telah meningkatkan kapasitas adsorpsi sebesar 11,11%.                                            Katakunci : Absorben, Biji Asam Jawa, Karbon Aktif.
APLIKASI KULIT PISANG KEPOK (Musa paradisiaca formatypica) SEBAGAI ADSORBEN ION MERKURI (Hg) Musafira Musafira; A. Risman; Erwin Abdul Rahim
KOVALEN: Jurnal Riset Kimia Vol. 2 No. 1 (2016)
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

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ABSTRACT The study aims are to determine the influence of the best of smooth and the best of volume eluent of the concentration of ion mercury (II) the colomn with the flow from top to bottom. These are used has a diameter 1 cm, height 35 cm and adsorbent 5 g. The variations upon the smooth which is used 10, 20 and 30 mL/minute ad the volume of eluent 10, 50, 100 and 150 mL with a concentration 60 mg/L at pH 5. This study is using random the factorial, each treatment done as much as two times. From the results showed that the best of smooth be achieved in the smooth 10 mL/minute and the best of volume eluent be achieved in the volume of 150 mL in adsorption of ion mercury (II). Keywords : Smooth, Volume of eluent, Kepok banana’s peels, Mercury.
PENGARUH VARIASI JENIS ASAM TERHADAP RENDEMEN GELATIN DARI TULANG IKAN CAKALANG (Katsuwonus pelamis) Ahmad Ridhay; Musafira Musafira; Nurhaeni Nurhaeni; Nurakhirawati Nurakhirawati; Nurul Bima Khasanah
KOVALEN: Jurnal Riset Kimia Vol. 2 No. 2 (2016)
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

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The research about “The Effect of Variation of the Type of Acid on Gelatine Yield from Cakalang Fish Bone (Katsuwonus pelamis)”. The aim of this research was to determine the higher gelatine rendament using various of type of acid. This research used Completely Randomized Design (CRD), each treatment was done in duplo.The acid variation in this research were Chloride, Sulphate, Phosphoric, Acetic, Oxalate and Citrate acid respectively. The result showed that the highest rendament was 14,658% at 5% of phosphoric acid. The analysis of the treatment has fulfilled the standard. Keywords : Gelatine, Cakalang fish bone, Isolate, Yield
KAJIAN AKTIVITAS ANTIOKSIDAN EKSTRAK DAUN TEMBELEKAN (Lantana camara L) BERDASARKAN TINGKAT KEPOLARAN PELARUT Oktavian Mangela; Ahmad Ridhay; Musafira Musafira
KOVALEN: Jurnal Riset Kimia Vol. 2 No. 3 (2016)
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

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The investigation about the antioxidant activity of tembelekan (Lantana camara L) leaf extract based on level polar solvent . Has been done the aim of this study was to determine the IC50 value and to know the content of antioxidant compounds from tembelekan leaf extract based on the level of polar solvent the extraction of tembelekan leaf was done with maceration method . The result showed that ethyl acetate extract of tembelekan leaf has the highest antioxidant activity with IC50 value was 71,70 ppm. Keywords: Tembelekan ( Lantana Camara L ) , IC50 , Antioxidant , DPPH
Co-Authors A. Risman Ahmad Ridhay Erwin Abdul Rahim Ni Ketut Sumarni Nurakhirawati Nurakhirawati Nurhaeni Nurhaeni Nurul Bima Khasanah Oktavian Mangela Serli Jayanti