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All Journal VALENSI Jurnal Sains Materi Indonesia Jurnal Sains dan Teknologi Nuklir Indonesia (Indonesian Journal of Nuclear Science and Technology) Microbiology Indonesia EduChemia: Jurnal Kimia dan Pendidikan

Hendrawati Hendrawati

Universitas Islam Negeri Syarif Hidayatullah Jakarta

Author-ID : 2994062

Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Energy Environmental Science Immunology & microbiology Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics

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Pemanfaatan Kulit Kacang Tanah (Arachis hipogaea L.) sebagai Adsorben Zat Warna Metilen Biru Nurhasni Nurhasni, M.Si; Reski Mar'af; Hendrawati Hendrawati
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 4, No. 2, November 2018
Publisher : Syarif Hidayatullah State Islamic University

Dye waste is a major problem in controlling environmental impacts. Dyestuff waste is an organic compound that is difficult to decompose, resistant, and toxic. If the waste is discharged into the water, it will cause environmental pollution. Research on the absorption of dyestuff of methylene blue by activated peanut shells has been carried out. The purpose of this study was to determine the adsorption efficiency, adsorption capacity, optimum conditions of dye adsorption including variation of contact time, adsorbent concentration, pH, and dye concentration. Adsorption test is carried out by batch method using a shaker. The adsorbent was then analyzed using FT-IR and SEM instruments. The results showed that, after activating the adsorbent had a better character than before activated. Peanut skin that has been activated with optimum NaOH against methylene blue, optimum conditions for adsorption of methylene blue dyestuff with 60 minutes contact time with alkaline activation adsorbent, optimum adsorbent concentration 1%, 50 ppm dye concentration, adsorbent size <180 μm, pH 9 The adsorption isotherm pattern follows the Freundlich isotherm.

Penggunaan H-Zeolit dan Tawas dalam Pemurnian Crude Glycerol dengan Proses Adsorpsi dan Koagulasi Isalmi Aziz; Nur Hijjah Bayani Fadhilah; Hendrawati Hendrawati
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 3, No. 1, Mei 2017
Publisher : Syarif Hidayatullah State Islamic University

Production of biodiesel from used cooking oil byproducts such as crude glycerol with low purity. The crude glycerol containing compounds impurities such as free fatty acids, alcohol, soap, catalyst and water. Compound adsorption of impurities can be done with the H-zeolite as adsorbent, but the resulting quality is still not good. To improve its quality, this research was added alum (coagulation) process so that the adsorption of colloidal-sized compound impurities which can be separated from the glycerol. The purpose of this research is determine optimal condition of adsorption and coagulation impurity compounds of crude glycerol by using H-zeolite and alum and also determine quality of glycerol was obtained. First, crude glycerol acidified by phosphoric acid 85% (pure analysis) until desired pH ±2.5. It was obtained purity of glycerol 72.797%. The next process is adsorption with activated H-zeolite and it obtained purity of glycerol 77.079%. The last process in this research is adsorption and coagulation by using H-zeolite and alum. The highest purity glycerol 93.803% was obtained from condition of adsorption and coagulation for 75 minutes; alum’s concentration 80 ppm; and temperature 60 ºC. The glycerol discharged from adsorption and coagulation process by using H-zeolite and alum is qualify Indonesia National Standard number 06-1564-1995 with 3.512% water content; 2.438% ash content; 0.247% MONG content; has no sugar; 1.259 g/mL density of glycerol; 0.2356% potassium content and 0.0410% aluminium content; and brighter color.DOI: http://dx.doi.org/10.15408/jkv.v0i0.5143

Co-Authors Ahmad Fathoni BUDIASIH WAHYUNTARI Dede Sukandar Delsy Syamsumarsih Elda Suci Yala Merru Ghulam Fathul Amri Indah Dwi Cahyati Isalmi Aziz Lisa Adhani Muhammad Nizar Aristya Niah Kusuma Hapsari Nubzah Saniyyah Nuni Nurbani Rohmah Nur Hijjah Bayani Fadhilah Nurdini Awaliyah Nurhasni, N. Reski Mar'af Sariana Harahap Siti Maryam Susi Sumarni Tri Heru Prihadi Yulyani Nur Azizah Yunasfi Yunasfi

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