Optimization of Iron Removal by Rice Husk Using Response Surface Methodology Approach

Monik Kasman, Shaliza Ibrahim

Abstract


Penelitian dilakukan untuk mengamati penyisihan besi (II) dari larutan cair dengan teknik adsorpsi - batch menggunakan dua varian adsorben sekam padi (sekam padi murni - RRH) dan sekam padi teraktivasi natrium (ARH). Hasil penelitian menunjukkan bahwa kedua adsorben mampu digunakan sebagai adsorben untuk mereduksi besi (II) dari larutan berair. Pada penelitian ini, pengaruh 4 variabel bebas pada dua level rendah dan tinggi meliputi pH (5 dan 9), dosis adsorben (20 dan 80 gr/100 mL), waktu kontak (60 dan 240 menit) dan konsentrasi awal larutan uji (20 dan 60 mg/l) terhadap respon (persentase penghapusan besi (II) menggunakan RRH dan ARH) dirancang dan dianalisis secara statistik menggunakan response surface methodology. Signifikansi faktor-faktor independen dan interaksinya diuji dengan menggunakan analisis varians (ANOVA) dengan batas kepercayaan 95%; (α = 0,05). Nilai optimum dari variabel terpilih diperoleh dengan mensubstitusi model regresi polinomial yang sesuai dan dengan menganalisis plot kontur permukaan respons serta dengan menyelidiki plot efek utama dari empat faktor. Proses adsorpsi sangat bergantung pada pH. Persentase hingga 100% dicapai pada pH 7 untuk kedua adsorben.


Keywords


besi (II), Sekam padi murni, Sekam padi teraktivasi, Response surface methodology.

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References


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DOI: http://dx.doi.org/10.33087/jiubj.v25i2.6275

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