{'fraction_non_alphanumeric': 0.03873598369011213, 'fraction_numerical': 0.0163098878695209, 'mean_word_length': 5.964539007092198, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Adsorptive Removal of Cationic Rhodamine B Dye from Aqueous Solutions Using Chitosan-Derived Schiff Base

ABSTRACT Chemical modification of chitosanwas successfully carried out using 2,3-dihydroxy-benzaldehyde by a chemical condensation reaction. Fourier transform infrared (FTIR), Scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) surface area,Thermal gravimetric analysis (TGA), and X-Ray Diffraction methods were performed for characterization of the chitosan-derived Schiff base adsorbent material. The prepared adsorbent’s efficiency in removing Rhodamine B dye from aqueous solution was explored, and experimental data were analyzed using isothermal and kinetic models. The BET surface area of chemically modified chitosan was greatly enhanced 125.8 m2g−1 with mesoporous characteristics. The maximum uptake was recorded at pH 8, while the maximum removal capacity was 233.4 mg g−1(25°C). The kinetic data were better fitted using nonlinear pseudo-first-order.