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All Journal Al-Ard: Jurnal Teknik Lingkungan
Putri Susanto, Ferennika Dzadzadira
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Environmental Science

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Ekstraksi dan Karakterisasi Silika dari Limbah Sandblasting sebagai Material Prekursor Adsorben Faramidha, Vira; Yuniarto, Adhi; Marsono, Bowo Djoko; Al Muttaqii, Muhammad; Listya Azzahra, Maharesmi; Putri Susanto, Ferennika Dzadzadira
Al-Ard: Jurnal Teknik Lingkungan Vol. 12 No. 1 (2026): September
Publisher : Department of Environmental engineering, Faculty of Science and Technology, Islamic State University Sunan Ampel Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29080/alard.v12i1.2607

Abstract

Sandblasting waste is a by-product of the shipyard industry. Large quantities of this waste are generated during surface cleaning and preparation process. This waste classified as hazardous and toxic waste. Usually, this waste is disposed despite containing a substantial amount of silica. Valorization of sandblasting waste offers a sustainable approach to reducing environmental burdens while promoting resource recovery. This study aimed to extract silica from sandblasting waste using the alkali fusion method. It also characterized the physicochemical properties of the silica as a basis for its potential use as a precursor material for adsorbent. Silica was successfully extracted with an SiO2 of 92,05%, as determined by X-ray fluorescence (XRF) analysis. Fourier transform infrared (FTIR) spectroscopy confirmed the presence of silanol (Si–OH) and siloxane (Si–O–Si) functional groups, which serve as active adsorption sites. Scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy (SEM–EDX) revealed a porous surface morphology with SiO₂ as the predominant composition. Furthermore, BET–BJH analysis demonstrated a specific surface area of 278,721 m2/g , average pore diameter of 7,317 nm. A type IV isotherm indicates the formation of a mesoporous structure. These characteristics suggest that the extracted silica possesses favorable physicochemical properties for adsorption processes.
Co-Authors Adhi Yuniarto Al Muttaqii, Muhammad Bowo Djoko Marsono Faramidha, Vira Listya Azzahra, Maharesmi