Electronic Theses and Dissertation

Tandan kosong kelapa sawit (TKKS) merupakan salah satu limbah yang banyak dihasilkan pada proses pertanian. Tandan kosong kelapa sawit dapat digunakan untuk sumber selulosa. Tujuan dari penelitian ini adalah pembuatan dan karakterisasi adsorben ion kadmium dari selulosa tergrafting glycidil methacrylate (GMA). Proses cangkok selulosa dilakukan dengan inisiator KPS. Spektra FT-IR menunjukan pembentukan selulosa tergrafting GMA (Sel-g-GMA) dan data XRD menunjukan penurunan kristalinitas. Kondisi grafting optimum diperoleh pada 20% GMA dengan persentase grafting sebesar 2,92% dan grafting efisiensi sebesar 25%. Pembuatan adsorben selulosa disebut Sel-g-GMA. Adsorben selulosa Sel-g-GMA dikarakterisasi dengan FT-IR, XRD dan SEM. Waktu kontak oprimum yang diperoleh pada adsorpsi ion logam Cd adalah 120 menit dengan kapasitas adsorpsi sebesar 5,9127 mg/gram dan pH optimum diperoleh pada pH = 8 dengan kapasitas adsorpsi sebesar 6,19048 mg/gram. Model kinetika reaksi adsorpsi mengikuti model kinetika pseudo orde 2 (PSO) dengan nilai R2 = 1 dan k = 0,02859 mg.g-1/menit. Nilai termodinamika untuk didapatkan sebesar ∆H sebesar 13,245 Kjmol-1. Dari hasil penelitian ini dapat disimpulkan bahwa adsorben Sel-g-GMA berpotensi menjadi adsorben ion logam kadmium.

Empty fruit bunches of oil palm (EFB) are one of the wastes that are often produced in the agricultural process. EFB can be used as a source of cellulose. The objective of this research is the synthesis and characterization of cadmium ion adsorbents from glycidyl methacrylate (GMA) grafted cellulose. The cellulose grafting process was carried out with the KPS initiator. FT-IR spectra show the formation of GMA grafted cellulose (Sel-g-GMA) and XRD data shows a decrease in crystallinity. Optimum grafting conditions were obtained at 20% GMA with a grafting percentage of 2.92% and a grafting efficiency of 25%. The manufacture of cellulose adsorbent is called Sel-g-GMA. Sel-g-GMA cellulose adsorbent was characterized by FT-IR, XRD and SEM. The oprimum contact time obtained in the adsorption of Cd metal ions was 120 minutes with an adsorption capacity of 5.9127 mg/gram and the optimum pH was obtained at pH = 8 with an adsorption capacity of 6.19048 mg/gram. The kinetic model of the adsorption reaction follows the pseudo 2nd order (PSO) kinetic model with a value of R2 = 1 and k = 0.02859 mg.g-1/minute. The thermodynamic value to be obtained is ∆H of 13.245 Kjmol-1. From the results of this research it can be concluded that the Sel-g-GMA adsorbent has the potential to become a cadmium metal ion adsorbent.