Penentuan Konstanta Isoterm Freundlich dan Kinetika Adsorpsi Karbon Aktif Terhadap Asam Asetat

Dwi Setyorini, Andi Arninda, Achmad Qodim Syafaatullah, Renova Panjaitan

Sari


Karbon aktif merupakan salah satu adsorben yang paling sering digunakan. Salah satu senyawa yang dapat diserap yaitu asam asetat. Untuk mengetahui kinerja adsoben lebih lanjut, maka diperlukan studi kinetika berdasarkan persamaan isotherm Freundlich. Isoterm Freundlich mampu menunjukkan jenis adsopsi apakah secara kimisorpsi atau fisisorpsi dan berlangsung secara multilayer. Studi kinetika pseudo first orde dan pseudo second orde dimaksudkan untuk mengetahui mekanisme dan karakteristik adsorpsi yang berlangsung. Penelitian ini bertujuan untuk mengetahui konstanta isotherm Freundlich dan kinetika adsorpsi karbon aktif terhadap asam asetat. Konsentrasi asam asetat yang digunakan untuk mengetahui konstanta freundlich yaitu 0,5M, 0,25M, 0,125M, 0,0625M, 0,03125M dengan lama waktu kontak selama 10 menit. Sedangkan kinetika adsorpsi dilakukan dengan menggunakan asam asetat yang berkonsentrasi 0,5 M dengan waktu adsorpsi 2 menit, 4 menit, 6 menit, 8 menit dan 10 menit. Kemudian filtrat di titrasi dengan NaOH 0,1N. Ukuran karbon aktif yang digunakan antara lain 180 mess, 420 mess dan 600 mess.  Data yang diperoleh dianalisis dengan persamaan freundlich, pseudo first orde dan pseudo second orde. Data analisis yang didapatkan nilai konstanta freundlich yaitu sebesar 50,00342 dan memenuhi kinetika orde dua yang artinya, proses adsorpsi dipengaruhi lebih dari satu faktor.


Kata Kunci


Isoterm Freundlich , Pseudo first orde, Pseudo second orde

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Referensi


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DOI: https://doi.org/10.31315/e.v20i3.10835

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