REMOVAL OF PHENOLS FROM INDUSTRIAL WASTEWATER USING MODIFIED METALLURGICAL WASTE
DOI:
https://doi.org/10.54668/2789-6323-2026-123-3-204-217Keywords:
phenol, adsorption, chromium-spinel sludge, alkaline modification, Langmuir isotherm, waste waterAbstract
This study investigates the potential for using XShP-02 chromium spinel sludge (rich fraction) from the Aktobe Ferroalloy Plant as a sorbent for the removal of phenol from the effluent of oil refineries. The sludge was subjected to alkaline modification with 1 M NaOH at 70 °C, followed by calcination at 450 °C. The physicochemical properties were characterised using XRF, SEM, IR spectroscopy and TGA/DSC. The Langmuir and Redlich–Peterson models provide the best description of the adsorption equilibrium (R² = 1.000). The maximum adsorption capacity is 36.00 mg/g; an optimal dose of 0.30 g/100 ml ensures the removal of 96% of phenol. ΔG° = -5.97 kJ/mol confirms the spontaneous physical nature of the adsorption and the possibility of sorbent regeneration.
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Copyright (c) 2026 Нурия Айкенова, Гаусар Мурат, Гузель Абилова, Умбеталы Сарсембин, Ерик Меркибаев, Сауле Нурмакова
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