CD Skripsi

Optimasi Proses Pembuatan Dan Adsorpsi Carbon Dots Dari Fluff Teh (Camellia Sinensis) Untuk Penjerapan Zat Warna Acid Red 88

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Carbon dots from fluff tea are one of the adsorbents that can be used to remove colorants from water. Fluff tea is a waste product from tea processing factories, consisting of whole and broken tea leaves and branches resulting from green tea production. Fluff tea contains amino acids, proteins, cellulose, microelements, tannins, and polyphenols that can be utilized as adsorbents. This research aims to analyze the optimum conditions for synthesizing and adsorbing carbon dots modified with ethylenediamine (EDA) from fluff tea to remove acid red 88 colorant using Response Surface Methodology, specifically Box-Behnken Design (BBD), and to analyze the adsorption efficiency of carbon dots with parameters such as adsorbent dosage, pH, and contact time against adsorbate concentration in removing acid red 88 colorant. The synthesis of carbon dots from fluff tea modified with ethylenediamine was formed through functionalization reactions. In this study, fluff tea was converted into nanoparticles through solvothermal processing with variations in temperature (160°C, 170°C, 180°C), reaction time (120, 180, 240 minutes), and ethanol solvent volume (130 mL, 140 mL, 150 mL) to obtain the optimum conditions for synthesizing carbon dots used as adsorbents for acid red 88 colorant. Characterization of the adsorbent carbon dots was performed using TEM, FESEM-EDX, and BET. The optimum synthesis occurred at 180°C, 164 minutes, and 130 mL of ethanol solvent with a yield of 19.1%. The optimum adsorption occurred at an adsorbent dosage of 0.096 g, pH 4, and 120 minutes with an adsorption efficiency of 85.3%. The FTIR results showed the presence of functional groups such as O-H, C-H aromatic, C-H aliphatic, C=O carbonyl, C=C, and C-N. The FESEM-EDX results showed the presence of elements C, O, N, Mg, Al, and K with a porous texture, irregular shape, and rough surface. The BET results showed the surface area of the adsorbent before adsorption to be 305.5310 m2/g and after adsorption to be 0.6927 m2/g. The adsorption isotherm model followed the Freundlich equation with the equation y = 0.5134x + 0.0929 and an R² value of 0.9743, which can be assumed that the adsorption mechanism occurs physically with active sites on the adsorbent surface being heterogeneous and forming a multilayer.

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

2003110700

Penerbit

Pekanbaru : Universitas Riau FMIPA Kimia., 2024

Deskripsi Fisik

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Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

2003110700

Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

Mutia

Versi lain/terkait

Lampiran Berkas

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