Adsorpsi Ion Cd2+ dalam Larutan Menggunakan Karbon Aktif dari Biji Trembesi (Samanea saman); Optimasi pH dan Waktu Kontak

Abstract

Adsorpsi ion Cd²⁺ dalam larutan menggunakan karbon aktif yang terbuat dari biji trembesi telah dilakukan. Biji trembesi (Samanea saman) dikarbonisasi dan diaktivasi dengan asam fosfat (H₃PO₄) untuk mengurangi kadar ion Cd²⁺ dalam larutan. Adsorpsi dilakukan dengan metode batch dengan 2 g/L karbon aktif dengan mengetahui pH adsorbat. Hasil yang diperoleh yaitu pH optimum proses adsorpsi ion Cd²⁺ terjadi pada pH 7 dengan jumlah ion Cd²⁺ yang teradsorpsi sebesar 97,11%.

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