Sintesis Nanokomposit Nata de Coco/Grafena Oksida Sebagai Adsorben Ion Logam Timbal

ABSTRACT In this study, bacterial cellulose was synthesized using waste coconut water from Tetey, North Region, North Sulawesi and was inserted with graphene oxide using in-situ method. Mass variations of graphene oxide were inserted into bacterial cellulose with variations of 0.1 g, 0.2 g, and 0.3 g. The bacterial cellulose/graphene oxide nanocomposite was then used as an adsorbent for lead metal (Pb). The resulting nanocomposite was characterized using Fourier-Transform Infrared Spectroscopy (FT-IR), Scanning Electron Microscope-Energy Dispersive X-Ray (SEM-EDX), and X-Ray Diffraction (XRD). The results of these characterizations proved that bacterial cellulose/graphene oxide was formed. Adsorption test showed that nanocomposite of bacterial cellulose/graphene oxide could act as adsorbent. The results of the analysis showed that the the greater the mass of GO inserted inti bacterial cellulose, the higher the Pb adsorption percentage. Keywords: bacterial cellulose/graphene oxide, adsorption, lead metal (Pb).   ABSTRAK Dalam penelitian ini telah dilakukan sintesis nanokomposit nata de coco dari air kelapa yang diambil dari Tetey, Minahasa Utara, Sulawesi Utara dan diinsersi dengan grafena oksida menggunakan metode in-situ. Variasi massa grafena oksida yang diinsersi ke dalam nata de coco dengan variasi 0,1 g, 0,2 g, dan 0,3 g. Nanokomposit nata de coco/GO digunakan sebagai adsorben logam timbal (Pb). Scanning Electron Microscope-Energy Dispersive X-Ray (SEM-EDX), X-Ray Diffraction (XRD), dan Fourier-Transform Infrared Spectroscopy (FT-IR) digunakan sebagi instrumen karakterisasi nanokomposit. Hasil karakterisasi tersebut membuktikan bahwa nanokomposit nata de coco/grafena oksida telah terbentuk. Berdasarkan hasil analisis menggunakan Atomic Adsorption Spectroscopy (AAS) menunjukkan bahwa nanokomposit nata de coco/GO mampu bertindak sebagai adsorben. Hasil analisis menunjukkan bahwa nilai persentase adsorpsi semakin besar dengan bertambahnya massa GO yang diinsersi ke dalam nata de coco.. Kata kunci: nata de coco/grafena oksida, adsorpsi, logam timbal (Pb).