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Audy Denny Wuntu
Department Of Chemistry Sam Ratulangi University, Jl. Kampus Kleak, Manado, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Environmental Science Mathematics Medicine & Pharmacology Physics Public Health Social Sciences

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Sintesis Nanobiochar Aktif Eceng Gondok (Eichornia crassipes) Sebagai Adsorben Sianida Dari Limbah Tambang Emas Rakyat Tuther, Paulix; Aritonang, Henry F.; Wuntu, Audy D.
CHEMISTRY PROGRESS Vol. 19 No. 1 (2026)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.19.1.2026.66360

Abstract

ABSTRAK Telah dilakukan penelitian mengenai sintesis nanobiochar dari eceng gondok pada suhu pirolisis 550°C. Sampel serbuk dan non aktivasi suhu 550°C (nanobiochar-550) maupun nanobiochar aktivasi basa NaOH (nanobiochar-550-AB)  dari eceng gondok yang dihasilkan dikarakterisasi menggunakan X-Ray Diffraction (XRD), Scanning Electron Microscope-Energy Dispersive X-Ray (SEM-EDX), Fourier-Transform Infrared Spectroscopy (FTIR). Hasil karakterisasi membuktikan terbentuknya nanobiochar dari eceng gondok. Kemudian, nanobiochar hasil sintesis dianalisis kemampuannya sebagai adsorben sianida. Berdasarkan hasil analisis menggunakan Spektofotometer uv-vis menunjukkan bahwa nanobiochar dari eceng gondok mampu bertindak sebagai adsorben. Hasil penelitian menunjukkan bahwa nanobiochar-550 mempunyai aktivitas absorpsi lebih besar dibandingkan nanobiochar-550-AB. Persentase adsorpsi ion sianida tertinggi untuk  nanobiochar-550 yaitu waktu kontak 120 menit, dengan % adsorpsi sebesar : 93,0 % dan massa nanobiochar 0,1 gram. Sedangkan presentasi adsorpsi tertinggi untuk adsorben nanobiochar-550-AB juga berada pada menit ke-120 dengan persentase adsorpsi 89,0 % ABSTRACT Research has been conducted on the synthesis of nanobiochar from water hyacinth at a pyrolysis temperature of 550°C. Powder samples and non-activated samples at a temperature of 550°C (nanobiochar-550) as well as NaOH-activated nanobiochar (nanobiochar-550-AB) from water hyacinth were characterized using X -Ray Diffraction (XRD), Scanning Electron Microscope-Energy Dispersive X-Ray (SEM-EDX), and Fourier-Transform Infrared Spectroscopy (FTIR). The characterization results confirmed the formation of nanobiochar from water hyacinth. Subsequently, the synthesized nanobiochar was analyzed for its ability as a cyanide adsorbent. Based on the analysis results using a UV-Vis spectrophotometer, it was found that nanobiochar from water hyacinth is capable of acting as an adsorbent. The results showed that nanobiochar-550 has greater adsorption activity compared to nanobiochar-550-AB. The highest percentage of cyanide ion adsorption for nanobiochar-550 was at a contact time of 120 minutes, with an adsorption percentage of 93.0% and a nanobiochar mass of 0.1 grams. Meanwhile, the highest adsorption percentage for the nanobiochar-550-AB adsorbent was also at 120 minutes with an adsorption percentage of 89.0%.
Modifikasi Pati Sagu Baruk (Arenga microcarpha Beccari.) dengan Ekstrak Hidrotermal Tongkol Jagung (Zea Mays L.) dan Aktivitas Antioksidannya Somalinggi, Venesa; Suryanto, Edy; Wuntu, Audy Denny
CHEMISTRY PROGRESS Vol. 19 No. 1 (2026)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.19.1.2026.68064

Abstract

ABSTRAK Antioksidan berperan penting dalam mencegah penyakit degenerative dengan menghambat radikal bebas. Tongkol jagung memiliki kandungan fenolik yang berpotensi sebagai antioksidan namun pemanfaata  nnya masih terbatas sebagai limbah. Penelitian ini bertujuan untuk mengevaluasi modifikasi pati sagu baruk menggunakan ekstrak hidrotermal tongkol jagung dan aktivitas antioksidannya. Perubahan morfologi, struktur molekul, dan kristalinitas dianalisis menggunakan metode SEM, FTIR, dan XRD. Hasil penelitian menunjukkan bahwa pati native (PN) memiliki struktur semi-kristalin Tipe A dengan morfologi granula bulat halus. Setelah modifikasi (H-8), terjadi transformasi menjadi fase amorf sepenuhnya yang dikonfirmasi oleh nilai FWHM tertinggi (5,88) dan munculnya puncak vibrasi khas fenolik pada FTIR (1573 cm-1 dan 1435 cm-1). Analisis SEM menunjukkan kerusakan granula yang masif dan pembentukan matriks amorf akibat perlakuan panas 80°C. Uji DPPH menunjukkan peningkatan aktivitas antioksidan yang signifikan pada pati termodifikasi dibandingkan kontrol. Hal ini menunjukkan bahwa inkorporasi ekstrak hidrotermal tongkol jagung berpotensi meningkatkan nilai fungsional pati sagu baruk sebagai agen antioksidan. ABSTRACT Antioxidants play an important role in preventing degenerative diseases by inhibiting free radicals. Corncobs contain phenolics that have potential as antioxidants, but their utilization is still limited as waste. This study aims to trigger the modification of sago starch using corncob hydrothermal extract and its antioxidant activity. Changes in morphology, molecular structure, and crystallinity were analyzed using SEM, FTIR, and XRD methods. The results showed that Native Starch (PN) has a Type A semi-crystalline structure with a smooth, round granule morphology. After modification (D-8), a transformation occurs into a fully amorphous phase, confirmed by the highest FWHM value (5.88) and the appearance of typical phenolic vibration peaks in FTIR (1573 cm-1 and 1435 cm-1). SEM analysis showed massive granule damage and the formation of an amorphous matrix due to heat treatment at 80°C. The DPPH test showed a significant increase in antioxidant activity in modified patients compared to controls. This indicates that the incorporation of corncob hydrothermal extract has the potential to increase the functional value of sago starch as an antioxidant agent.
Co-Authors Abdul R.H. Korompot Andre G Kalensun Bando, Reksih Evander Bolilera, Theressa Bungan, Gladys K Chaleb Paul Maanari Christmas Togas Colling, Erningsi Dewi A Bukasa Djoni Hatidja Djoni Hatidja Dwi Putra Wijaya Edi Suryanto Edi Suryanto Edy Suryanto Fajar Saut Hamonangan Sitinjak Feti Fatimah Ghazaly R. Umaternate Grace Aprianne Bellatrix Patiung Guntur Pasau Haider Ali Ginting, Haider Ali Harry Julius Koleangan Harry Koleangan Harry S. J. Koleangan Harry S.J Koleangan Harry S.J Koleangan Harry S.J. Koleangan Harry S.J. Koleangan Henry Fonda Aritonang Herling D. Tangkuman Jacobus, Meyffi Merrylin Jemmy Abidjulu Johnly Alfreds Rorong Jonathan Wuntu Julius Pontoh Julius S. Pontoh Kakame, Dewi Y. N. Koleangan, Harry Koleangan, Harry Steven Julius Korompot, Abdul R.H. Kumanaung, Maureen Lengkong, Vanda Lidya I Momuat Lidya I. Momuat Lidya Irma Momuat Lidya Irma Momuat Lidya Irma Momuat Lidya Irma Momuat Lumentut, Chrisela Lusiana Eka Sari Maarebia, Rosalinda Zeniona Ma’ruf, Hasna Makatipu, Christian D. Marini Runtu Mariska Margaret Pitoi Martin Aprilino Tambunan, Martin Aprilino Maureen Kumaunang Maureen Kumaunang Max R.J. Runtuwene Meiske S Sangi Meiske S Sangi Meiske S. Sangi Meiske Sientje Sangi, Meiske Sientje Michelle Poluakan, Michelle Mira Marlinda Muzakir Rahalus, Muzakir Norrytha L Wuntu Norrytha Lineke Wuntu Onggeteua, Fita M. Pandelaki, Elmi C.J. Pangajow, Stoflly E. M. Prasetyo, Yudhie E Pujiarti, Pujiarti Rizky B. Holle Rosdiana Tidore Runtu, Marini Sanusi Gugule Silvana Yoce Tuwohingide Somalinggi, Venesa Stifanus Billy Pelle Suhardi Titdoy, Suhardi Syamsi, Ibnu Darmawan Talita Kojong Taringan, Agres K. Tatinting, Gabriel Dinnydio Tumbel, Elsa D. Tumbelaka, Riddel M M Y Tumbelaka, Riddel M.M.Y. TUMUAHI, FIRGIN PRITTY DEISYELLA Tuther, Paulix Vanda Kamu Vanda Lengkong Vanda S Kamu Vanda S. Kamu Vanny H. Siwi Vanny Hani Siwi Widya Astuti Lolo Wuntu, Norrytha L Wuntu, Norrytha L. Yudhie E Prasetyo