Year: 2025
Type: article
Abstract: This study explores the synthesis of calcium sulfate (CaSO 4 ) from dolomite. The process involves leaching dolomite rock in hydrochloric acid and filtration to remove silica impurities. Optimization was achieved using the Box-Behnken design from Design Expert 13.0 software, with temperature (10–50 °C), time (5–10 min), and acid concentration (1–5 M) as variables. Optimal conditions for CaSO 4 synthesis were 10 °C, 10 min, and 3.5 M H 2 SO 4 . A significant quadratic model (P-value = 0.0002, R 2 = 0.923) was developed for CaSO 4 synthesis. XRD analysis confirmed the prominent phase angle of synthesized CaSO 4 at 11.8° with 92% purity. XRF analysis revealed a composition of 53.686% SO 3, and 41.798% CaO. The flaky morphology of CaSO 4 was observed from the SEM analysis, and TGA analysis showed stability at 200 °C and decomposition at 383.78 °C. This study demonstrates the suitability of Box-Behnken Design for determining optimal process parameters, and the high-purity CaSO 4 produced can be recommended for various applications, including bone implants, plaster of Paris, cement production, and soil remediation.
Source: Scientific Reports
Authors: Isaac Adekunle Joseph, Elijah Olawale Ajala, Amina Ahmed El-Imam, Mary Adejoke Ajala, Comfort Temitope Are, Esther Olubunmi Babatunde
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,690
OpenAlex ID: W4409645586