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Pisceselia, Dian Febrianti
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Biosorption of Ni(II) Ions from Aqueous Solution Using Immobilised Cells of Bacillus cereus Khairunnisa, Khairunnisa; Nur, Ahmad Moh; Pisceselia, Dian Febrianti; Fira, Aulia Almag; Aldeani, Putri
International Journal of Engineering, Science and Information Technology Vol 5, No 4 (2025)
Publisher : Malikussaleh University, Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52088/ijesty.v5i4.1773

Abstract

In the present study, immobilised Bacillus cereus cells were used as a biosorbent for the removal of Ni2+ ions from aqueous solution. Bacillus cereus was immobilised with 3% sodium alginate and 2% CaCl2. The adsorption studies of bacteria were investigated in batch mode. Optimum biosorption conditions were determined as a function of pH, biosorbent dose, Ni2+ ion concentration, and contact time. The removal of Ni2+ ions increases with increased dose of biosorbent, while the adsorption capacity decreases with increasing dose of biosorbent. The equilibrium adsorption data were analysed using the Langmuir and the Freundlich isotherm models. The regression coefficient (R2) for the Langmuir isotherm was 0.9822 at a contact time of 60 minutes and pH 6. The maximum monolayer adsorption capacity (qe) of the biosorbent, as obtained from the Langmuir adsorption isotherm, was found to be 57.80 mg/g with the Langmuir adsorption constant ( 0,086 L/mg. RL values range from 0 to 1, as shown, supporting the previous observation that the Langmuir isotherm was favourable for Ni2+ ion adsorption. The adsorption kinetics were analysed using the pseudo-first-order and pseudo-second-order models. Kinetics of Adsorption followed pseudo-second order with a regression coefficient of pseudo-second order of  R2 0.98, the coefficient of rate constant for pseudo-second order () obtained 0.004 g/mg.min, pointing out that the adsorption mechanism is chemosorption or ion exchange. FTIR spectrum of biosorbent revealed the presence of OH, NH, C-H, C=O and COO-. SEM-EDX was used to analyse the surface morphology and texture of the biosorbent.
Biomass-Derived Activated Carbon: Synthesis, Influencing Factors, and Applications in Environmental Remediation – A Review Pisceselia, Dian Febrianti; Putri, Rara Eka Dyla; Gayatri, Rianyza
Chemical Engineering Journal Storage (CEJS) Vol. 6 No. 02 (2026): Chemical Engineering Journal Storage (CEJS)-April 2026
Publisher : LPPM Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/cejs.v6i02.26954

Abstract

Pencemaran lingkungan akibat limbah industri yang mengandung logam berat, zat warna, dan senyawa organik berbahaya merupakan isu global yang memerlukan teknologi pengolahan yang efektif dan berkelanjutan. Karbon aktif merupakan material berpori dengan luas permukaan tinggi yang memiliki kemampuan adsorpsi unggul, sehingga banyak dimanfaatkan dalam pengolahan limbah dan pengembangan material fungsional. Kajian ini berfokus pada perkembangan sintesis karbon aktif berbasis biomassa, faktor-faktor yang memengaruhi karakteristiknya, serta aplikasinya dalam penyisihan polutan. Pendekatan yang digunakan berupa analisis literatur dari berbagai penelitian terkini. Hasil kajian menunjukkan bahwa kinerja karbon aktif ditentukan oleh jenis bahan baku, metode aktivasi, serta kondisi proses dan operasional. Biomassa lignoselulosa seperti tempurung kelapa, sekam padi, dan bagasse tebu memiliki potensi besar sebagai bahan baku berkelanjutan. Karbon aktif terbukti efektif dalam mengadsorpsi logam berat, zat warna, dan senyawa organik, serta berpotensi dikembangkan dalam aplikasi energi seperti superkapasitor. Secara keseluruhan, karbon aktif berbasis biomassa merupakan solusi yang menjanjikan, meskipun masih diperlukan optimasi untuk implementasi skala industri.
Co-Authors Aldeani, Putri Fira, Aulia Almag Gayatri, Rianyza Khairunnisa Khairunnisa Nur, Ahmad Moh Putri, Rara Eka Dyla