Adsorption of Orange G Dye on Hydrophobic Activated Bentonite from Aqueous Solution
نویسندگان
چکیده
This report focusses on the modification of physical structure and chemical properties a bentonite clay from Hammam Boughrara region Maghnia district in western Algeria to maximize its adsorption capacity. The purified (called B) was modified, either by acid activation with 1M sulfuric (B-Act), or intercalation cationic surfactant cetytrimethyl ammonium bromide (CTAB), applying cation exchange capacity (CEC) 100% B-CTAB). Modification B also introduced combining these two steps consecutively, i.e., at first B, followed CTAB (B-Act-CTAB). B-Act-CTAB obtained H2SO4 (1M) activation, co-adsorption 300% CEC B-Act as precursor. In particular, strong increase surface area pore volume modified bentonites observed for (469.83 m²/g 0.401 cm3g−1), B-Act-CTAB100 (267.72 0.316 cm3 g−1) B-Act-CTAB300 (111.15 0.171 compared (31.79 0.074 B-CTAB (3.79 0.034 g−1), respectively. bentonite-based adsorbents were then used evaluate removal efficiency an organic molecule, azo dye Orange G (OG), model Persistent Organic Pollutant. Freundlich, Langmuir Sips (Langmuir–Freundlich) models applied analyze equilibrium isotherms, showing good correlation between experimental data Freundlich model. A agreement experimentally kinetic pseudo-second-order model, allowing rate constants. can be low-cost material dyes, since towards OG (102.80 mg/g) exceeds largely that (31.49 (12.77 mg/g).
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ژورنال
عنوان ژورنال: Crystals
سال: 2023
ISSN: ['2073-4352']
DOI: https://doi.org/10.3390/cryst13020211