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All Journal JURNAL KESEHATAN LINGKUNGAN: Jurnal dan Aplikasi Teknik Kesehatan Lingkungan Jurnal Sains dan Teknologi Reaksi Jurnal Teknologi
Zahra Fona
Politeknik Negeri Lhokseumawe
Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health

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Pemurnian Bioetanol Dari Limbah Kulit Kopi Dengan Menggunakan Zeolit Alam dan Batu Gamping Sri Mutia Heriwati; Zahra Fona; Adriana Adriana
Jurnal Teknologi Vol 21, No 2 (2021): Oktober 2021
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (171.579 KB) | DOI: 10.30811/teknologi.v21i2.2428

Abstract

In this research, zeolites were used to increase the levels of ethanol distillation process results of laboratory Department of Chemical Engineering Politeknik Negeri Lhokseumawe. Ethanol yield after distillation process only reaches 20.66%, to increase the concentration of ethanol used advanced treatment is by the adsorption method. The results were obtained optimum ethanol concentration, ie 38.67% with a contact time of 8 hours and 80 mesh size. the refractive index and density of 1.33960 and 0.798. bioethanol with 3 g of limestone can eliminate moisture content up to 29.36%; the activation treatment adsorption process of bioethanol with adsorbent zeolite, limestone, and limestone following the zeolite with Freundlich isotherm with adsorption capacity of each 4.5 mg / g; 5.7 mg / g; and 6.4 mg / g.
KOMPOS PELLET DARI AMPAS KOPI GAYO ESPRESSO DENGAN STARTER ALAMI Zahra Fona; Eka Maryan Putri; Ummi Habibah; Raudah Raudah; Zuhra Amalia
JURNAL KESEHATAN LINGKUNGAN: Jurnal dan Aplikasi Teknik Kesehatan Lingkungan Vol 18 No 2 (2021): Jurnal Kesehatan Lingkungan Volume 18 No. 2, Juli 2021
Publisher : Poltekkes Kemenkes Banjarmasin Jurusan Kesehatan Lingkungan Banjarbaru

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (368.038 KB) | DOI: 10.31964/jkl.v18i2.310

Abstract

Compost is very useful for soil improvement, maintaining soil stability and fertility, and increasing micro nutrients required by plants. This study aims to determine the effect of using natural starters:  chicken manure (A), cow dung (S), and EM4 on composting time, compost pH, and the macro nutrient content made from Gayo espresso coffee waste. The waste of Gayo espresso coffee, which is available abundantly available in coffee shops, which is used as raw material for composting. Starters the form of A, S, a mixture of A with S, and EM4 are used to shorten composting time, and improve compost characteristics to conform to SNI standards. Gayo espresso coffee waste is mixed with starter A, starter mixture S. starter mix, and EM4 then fermented in a closed container. Compost pH measurements during the composting process are carried out every day until the pH is close to neutral, which indicates the compost is ripe. After composting, the products that were quickly formed from all treatment variables were tested for macro nutrient levels in the form of N, P, K and C / N ratios. The compost is printed in the form of pellets using a pelletizer mold. The test results showed that the use of 200g starter A (cow dung) and 6 ml EM4 produced compost within 25 days. The average acidity of the compost for all treatments ranged from 6.83. Micro nutrient content in the compost is 1.11% nitrogen, 0.81% phosphorus, 1.64% potassium and C / N ratio 11.06, according to SNI standards.
THE EFFECTIVENESS OF KAOLIN ADSORBENTS MODIFIED WITH ALKYLBENZENE SULFONATE (ABS) SURFACTANT AND ACTIVATED BY ULTRASOUND FOR THE ADSORPTION OF Mg(II) IONS IN WATER H Herdiansyah; Alfian Putra; Zahra Fona
Jurnal Sains dan Teknologi Reaksi Vol 24, No 01 (2026): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v24i01.10958

Abstract

This study aims to analyze the ability of surfactant-modified kaolin and ultrasonically activated kaolin adsorbents to remove Mg(II) from water, as well as to determine the optimal adsorption conditions and the appropriate kinetic model. Kaolin modification was performed using alkyl benzene sulfonate surfactant at concentrations of 35%, 45%, and 55%, while ultrasonic activation was performed with irradiation times of 25, 35, and 45 minutes. The adsorption process was conducted at an initial Mg(II) concentration of 10 mg/L with contact times of 30, 60, 90, 120, and 150 minutes. The adsorbent was characterized using Fourier Transform Infrared (FTIR) and Scanning Electron Microscopy (SEM), while the Mg(II) concentration was analyzed using an Atomic Absorption Spectrophotometer (AAS). The results of the study show that the optimum adsorption time was reached at the 90th minute. Surfactant-modified kaolin (35%) yielded the best results with a final Mg(II) concentration of 1.5266 mg/L and a removal efficiency of 84.73%, while ultrasonically activated kaolin with an irradiation time of 45 minutes resulted in a final concentration of 1.5342 mg/L and a removal efficiency of 84.65%. FTIR and SEM results indicate the interaction of Mg(II) ions with the adsorbent surface without damaging the kaolin’s basic structure. Kinetic analysis shows that the adsorption process follows the pseudo-second-order Lagergren model with a coefficient of determination (R²) approaching 1, indicating an effective and stable adsorption mechanism.Keywords: kaolin, adsorption, Mg(II), surfactant, ultrasonic, adsorption kinetics.
Co-Authors Adriana Adriana Alfian Putra Eka Maryan Putri H Herdiansyah Muhammad Hidayat Muhammad Razi Raudah Raudah Sri Mutia Heriwati Ummi Habibah Zuhra Amalia