Analisis dan Pemodelan Mekanisme Adsorpsi Pewarna Methylene Blue dan Congo Red menggunakan Komposit Cangkang Telur-Kaolin dalam Bentuk Bead

Abstract

Pencemaran air akibat limbah zat warna Methylene Blue (MB) dan Congo Red (CR) memerlukan adsorben yang efektif. Penelitian ini bertujuan menganalisis pengaruh metode homogenisasi terhadap karakteristik bead komposit cangkang telur-kaolin melalui karakterisasi material, menentukan kondisi optimum adsorpsi, dan mengevaluasi mekanismenya melalui pemodelan kinetika, isoterm, dan termodinamika. Hasil penelitian menunjukkan metode ultrasonikasi menghasilkan permukaan bead yang lebih homogen dan mencegah aglomerasi. Kinerja adsorpsi menunjukkan bead CT1K1-US memiliki efisiensi penyisihan MB mencapai 76,99% mengikuti model PFO, namun model isoterm menyimpang. Adsorpsi CR memiliki RE 91,43% oleh bead CT1K1-S mengikuti model PFO, Freundlich dan Temkin, dan RE 91,43% oleh bead CT2K1-US mengikuti model PFO, dan model isoterm yang menyimpang. Metode ultrasonikasi menciptakan struktur permukaan bead dan interaksi yang kompleks.

Water pollution caused by Methylene Blue (MB) and Congo Red (CR) dye waste requires effective adsorbents. This study aimed to investigate the effect of homogenization methods on the characteristics of eggshell–kaolin composite beads through material characterization, determine the optimum adsorption conditions, and evaluate the adsorption mechanism using kinetic, isotherm, and thermodynamic models. The results showed that ultrasonication produced a more homogeneous bead surface and prevented particle agglomeration. The CT1K1-US bead removed 76.99% of MB, following the PFO kinetic model, although the isotherm model deviated. The CT1K1-S bead removed 91.43% of CR, following the PFO Freundlich, and Temkin models, while the CT2K1-US bead also removed 91.43% of CR with the PFO model, and adsorption isotherm models showing poor agreement. Overall, ultrasonication produced a distinctive bead surface structure and more complex adsorption interactions.