KINETICS ADSORPTION OF Fe(II) IONS USING CELLULOSE ACETATE FROM NIPAH FRONDS (Nypa Fruticans)
DOI:
https://doi.org/10.24843/JCHEM.2026.v20.i01.p07Abstract
Adsorbents are solid substances that have the ability to adsorb certain components from the fluid phase. The problem of heavy metal pollution, such as iron (Fe(II)), in water is increasing due to industrial and domestic activities, which can reduce environmental quality and endanger human health. Therefore, effective, environmentally friendly, and easily obtainable adsorbents are needed to address this problem. One potential source is nipah palm fronds (Nypa fruticans), which contain high amounts of cellulose and have not been optimally utilized. This study aims to determine the characteristics of cellulose and cellulose acetate from Nipah palm fronds and the ability of cellulose acetate to adsorb Fe(II) ions. The stages in the production of cellulose acetate include the isolation of cellulose from nipah palm fronds (Nypa Fructicans), the synthesis of cellulose acetate, the determination of the acetyl content and degree of substitution, and analysis using FTIR and AAS. The results obtained from cellulose show the presence of O–H, C–H, and C–O groups, while for cellulose acetate from nipah palm fronds, there are C=O, C–O–C, and C–O groups. The adsorption method was used to bind the adsorbate at the optimum mass and contact time. The Fe metal adsorption capacity was obtained at an optimum mass of 0.06 g, with an adsorption efficiency of 52.34%. The optimum contact time was 90 minutes with an adsorption efficiency of 43%. The adsorption kinetics followed second-order adsorption kinetics with a rate constant of 7.7 x 10–3 and a regression coefficient of R2 = 0.9998.
Keywords: Nipah palm fronds, cellulose acetate, kinetic adsorption, Fe(II) ions
Abstrak
Adsorben adalah zat padat yang memiliki kemampuan menyerap komponen tertentu dari fase fluida. Permasalahan pencemaran logam berat seperti besi (Fe(II)) dalam air semakin meningkat akibat aktivitas industri dan domestik, yang dapat menurunkan kualitas lingkungan serta membahayakan kesehatan manusia. Oleh karena itu, diperlukan bahan adsorben yang efektif, ramah lingkungan, dan mudah diperoleh untuk mengatasi masalah tersebut. Salah satu sumber potensial adalah pelepah nipah (Nypa fruticans), yang mengandung selulosa dalam jumlah tinggi dan selama ini belum dimanfaatkan secara optimal. Penelitian ini bertujuan untuk mengetahui karakteristik selulosa dan selulosa asetat pelepah nipah serta kemampuan selulosa asetat dalam menyerap ion Fe(II). Tahapan dalam pembuatan selulosa asetat meliputi isolasi selulosa pelepah nipah (Nypa Fruticans), sintesis selulosa asetat, penentuan kadar asetil dan derajat substitusi, analisis menggunakan FTIR dan AAS. Hasil yang diperoleh dari selulosa yaitu terdapat gugus O–H, C–H dan C–O sedangkan untuk selulosa asetat dari pelepah nipah adanya gugus C=O, C–O–C dan C–O. Metode adsorpsi digunakan untuk mengikat adsorbat pada massa dan waktu kontak optimum. Kapasitas serapan logam Fe diperoleh pada massa optimum 0,06 g, efisiensi serapan 52,34%. Waktu kontak optimum pada 90 menit dengan efisiensi penyerapan sebesar 43%. Kinetika adsorpsi mengikuti kinetika adsorpsi orde dua dengan konstanta laju sebesar 7,7 x 10–3 dan koefisien regresi R2 = 0, 9998.
Kata kunci: Pelepah nipah, selulosa asetat, kinetika adsorpsi, ion Fe(II)
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