Kinetika Reaksi pada Pengolahan Limbah Fe Sintesis dengan Metode Elektrokoagulasi
Keywords:
Limbah Fe; elektrokoagulasi; konstanta kecepatan reaksi; orde reaksiAbstract
Proses industri seperti pertambangan, pelapisan logam, atau pembuatan baterai menghasilkan logam berat yang dibuang ke lingkungan, tentunya hal ini dapat mencemari lingkungan. Dalam jumlah tertentu logam Fe adalah salah satu jenis logam yang dibutuhkan manusia. Namun hal ini akan berdampak buruk bagi lingkungan dan kesehatan manusia apabila kadar Fe melebihi konsentrasi 1 g/L. Metode elektrokoagulasi merupakan salah satu metode yang dapat digunakan untuk mengolah limbah Fe. Penelitian ini bertujuan untuk mempelajari efisiensi penurunan limbah, konstanta kecepatan reaksi, dan reaksi dengan menggunakan variabel jenis elektroda dan jarak antar elektroda. Limbah Fe sintetis dibuat dengan mencampur (FeSO4).7H2O dengan 500 mL aquadest diaduk selama 25 menit dengan kecepatan 400 rpm.= Proses elektrokoagulasi dilakukan dengan memasukkan limba=h Fe sintetis sebanyak 500 mL kedalam rangkaian alat elektrokoagulasi dengan tegangan 10V dengan menggunakan variasi jenis elektroda yaitu Al, Fe, dan Cu dan jarak antar elektroda (4,5, dan 6). Setelah proses elektrokoagulasi sampel limbah diambil setiap 0; 25 ;50; 75; 100; dan 125 menit dan diuji menggunakan AAS. Berdasarkan penelitian efisiensi penurunan limbah tertinggi adalah sebesar 99,99% pada variasi elektroda Cu. Hasil penelitian menunjukkan orde reaksi yang sesuai untuk elektrokoagulasi limbah sintesis Fe adalah orde dua dengan konstanta kecepatan reaksi sebesar 2,4535 ppm-1menit-1.
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