Pemurnian Garam NaCl melalui Metode Rekristalisasi Garam Krosok dengan Penambahan Na2CO3, NaOH dan Polialuminium Klorida untuk Penghilangan Pengotor Ca2+ dan Mg2+

Akustika Gemati; Gunawan Gunawan; Khabibi Khabibi

doi:10.14710/jksa.16.2.50-54

DOI: https://doi.org/10.14710/jksa.16.2.50-54

Pemurnian Garam NaCl melalui Metode Rekristalisasi Garam Krosok dengan Penambahan Na2CO3, NaOH dan Polialuminium Klorida untuk Penghilangan Pengotor Ca2+ dan Mg2+

Akustika Gemati, Gunawan Gunawan

, Khabibi Khabibi

Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University, Indonesia

Published: 1 Aug 2013.

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Abstract

Telah dilakukan penelitian tentang pemurnian garam NaCl melalui metode rekristalisasi garam krosok dengan penambahan Na₂CO₃, NaOH dan polialuminium klorida untuk penghilangan pengotor Ca²⁺ dan Mg²⁺. Tujuan penelitian ini adalah untuk menentukan pengaruh penambahan Na₂CO₃dan NaOH terhadap konsentrasi kadar Mg²⁺ dan Ca²⁺ pada garam krosok serta untuk mengetahui efektivitas penambahan flokulan polialuminium khlorida (PAC) dalam reaksi pengendapan CaCO₃dan Mg(OH)₂ dengan metode rekristalisasi modifikasi spray. Metode yang dilakukan pada penelitian ini dengan cara menambahkan bahan pengikat pengotor yang harganya lebih murah seperti Na₂CO₃dan NaOH serta flokulan PAC yang dapat mengendapkan ion pengotor pada garam yaitu ion Ca²⁺ dan Mg²⁺ kemudian dilakukan rekristalisasi dengan modifikasi model spray untuk mendapatkan kristal NaCl yang lebih murni dengan lahan yang tidak begitu luas dan rekristalisasi meja kristalisasi penguapan. Hasil pemurnian garam krosok diperoleh kadar NaCl 98,53%, Ca²⁺ 0,0600%, dan Mg²⁺ 0,0288% dengan penambahan Na₂CO₃ 20% w, NaOH0,1 N dan PAC 10 ppm sebanyak 3 mL, yang telah sesuai standar industri Indonesia (SII).

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Keywords: Garam Krosok; Pemurnian Garam; NaCl; Na2CO3; NaOH; PAC

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Section: Research Articles

Language : ID

In Vol 16, No 2 (2013): Volume 16 Issue 2 Year 2013

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