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PENURUNAN KADAR KROMIUM (VI) LIMBAH PENYAMAKAN KULIT MENGGUNAKAN ENCENG GONDOK DAN ARANG AKTIF KULIT KAKAO
Abstrak (Bhs. Indonesia)
Kadar kromium (VI) dalam sampel limbah penyamakan kulit telah diturunkan menggunakan enceng gondok dan arang aktif kulit kakao. Aktivasi kulit kakao menjadi arang aktif menggunakan CaCl2 selama 24 jam, kemudian dimasukkan dalam furnace bersuhu 350 ˚C selama 1 jam. Hasil yang diperoleh menunjukkan bahwa arang aktif memiliki kadar air 12,17 %, kadar abu 63,27 %, bulk density 570 g/L, particle density 1256 g/L, porositas 55 %, luas permukaan 5,18 m2/g, rerata jari pori 113,21 Å, dan volume total pori 1,47x10-2 cc/g. Penurunan kadar Cr (VI) dilakukan pada limbah penyamakan kulit yang terlebih dahulu disaring dan diperoleh kadar Cr (VI) awal sebesar 2,33 ppm. Berdasarkan hasil penelitian yang dilakukan selama 10 hari, dihasilkan efisiensi penurunan kadar Cr (VI) pada bak penampung 1 (enceng gondok), bak penampung 2 (arang aktif kulit kakao), dan bak penampung 3 (arang aktif kulit kakao dan enceng gondok) masing – masing sebesar 99,57 %, 99,83 %, dan 99,96 %.
Abtrak (Bhs. Inggris)
Chromium (VI) persentage in tannery waste samples was decreased using water hyacinth and activated charcoal cocoa skin. Activation cocoa skin becomes activated charcoal using CaCl2 for 24 hours, then put in a furnace temperature of 350 ˚C for 1 hour. The results obtained showed that activated charcoal has a moisture content of 12.17 %, ash content of 63.27 %, bulk density of 570 g/L, particle density of 1256 g/L, porosity of 55 %, surface area of 5.18 m2/g, average pore size of 113.21 Å, and total pore volume of 1.47x10-2 cc/g. Decreasing of Cr (VI) percentage was carried out on the tannery wastes filtered and was obtained innitial Cr (VI) percentage of 2.33 ppm. Based on the results of research conducted over 10 days, resulting efficiency decreased levels of Cr (VI) on tank 1 (water hyacinth), tank 2 (activated charcoal cocoa skin), and tank 3 (activated charcoal cocoa and water hyacinth) respectively - each amounted to 99.57 %, 99.83 % and 99.96 %.
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Pembimbing 1
Pembimbing 2
Pembimbing 3
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