نوع مقاله : پژوهشی
نویسنده
گروه فرش، دانشگاه هنر شیراز، شیراز، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسنده [English]
This study explores the use of natural, low-cost adsorbents—date pit and olive pomace—for the simultaneous removal of industrial dyes (cationic, reactive, direct) and heavy metals (Cr(III), Cu(II), Al(III)) from carpet dyeing wastewater. The adsorbents were processed and characterized (BET, FTIR, SEM), revealing that olive pomace, with a higher surface area (623 m²/g) and more abundant functional-groups, had superior performance compared to date pit (457 m²/g). Experiments under optimal conditions (pH 5.5, 4 g/L, 90 min, 25°C) showed the kinetic data fit a pseudo-second-order model (R² > 0.99) and the adsorption isotherms fit the Langmuir model (R² > 0.98). The maximum adsorption capacity reached 156.7 mg/g for cationic dye and 56.2 mg/g for Cu(II) with olive pomace. Thermodynamic parameters indicated a spontaneous, endothermic process. The method removed over 85% of metals and over 90% of dyes, with up to 70% cost reduction versus conventional treatments. These results demonstrate the strong industrial potential of these bioadsorbents, especially in areas like Fars province.
کلیدواژهها [English]
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