Karakterisasi Nanopartikel Karbon (C-dots) dari Limbah Kelapa Sawit

Abstract

Peningkatan produktivitas kelapa sawit meningkatkan limbah yang dihasilkan. Penelitian ini mengkarakterisasi C-dots dari Tandan Kosong Kelapa Sawit (TKKS) dan pelepah dengan agen pasivasi menggunakan metode hidrotermal, serta menganalisis efektivitas C-dots dari TKKS dan pelepah kelapa sawit sebagai penjerap zat warna dan logam berat, termasuk pendeteksi logam berat pada air. Penelitian ini meliputi preparasi sampel, sintesis C-dots, adsorpsi Pb(II) dan zat warna MB, uji sensor ion logam Pb2+ dan karakterisasi C-dots. C-dots dari TKKS dan pelepah kelapa sawit formula 1 dan formula 3 memiliki rendemen tertinggi. Uji sensor logam berat Pb²? menunjukkan variasi intensitas fluoresensi. Adsorpsi Pb(II) oleh C-dots meningkat seiring waktu kontak. Spektrum emisi fluoresensi menunjukkan C-dots TKKS formula 2 (asam sitrat-urea) dan C-dots pelepah formula 3 (urea) memiliki gelombang emisi maksimum, sedangkan formula 4 (air) memiliki panjang gelombang emisi terendah pada TKKS maupun pelepah kelapa sawit. Pola serapan UV-Vis menunjukkan C-dots TKKS formula 1 (asam sitrat-NH4OH) memiliki absorbansi tertinggi. Spektrum FTIR menunjukkan puncak serapan dan gugus fungsi pada C-dots TKKS dan pelepah kelapa sawit.

Increasing palm oil productivity increases the waste produced. This study characterizes C-dots from Empty Palm Oil Bunches (TKKS) and fronds with passivation agent using hydrothermal method, and analyzes the effectiveness of C-dots from TKKS and palm fronds as a sorbent of dyes and heavy metals, including heavy metal detection in water. This research includes sample preparation, C-dots synthesis, adsorption of Pb(II) and MB dye, Pb2+ metal ion sensor test and C-dots characterization. C-dots from TKKS and palm fronds formula 1 and formula 3 have the highest yield. The Pb²? heavy metal sensor test showed variation in fluorescence intensity. Adsorption of Pb(II) by C-dots increased with contact time. Fluorescence emission spectra showed that TKKS C-dots formula 2 (citric acid-urea) and palm frond C-dots formula 3 (urea) had the maximum emission wavelength, while formula 4 (water) had the lowest emission wavelength in both TKKS and palm frond. The UV-Vis absorption pattern shows that the TKKS C-dots formula 1 (citric acid-NH4OH) has the highest absorbance. FTIR spectrum shows the absorption peaks and functional groups in the C-dots of TKKS and oil palm fronds.