abstract
This study investigates the combined application of coagulation-flocculation-sedimentation (CFS) and adsorption using corncob (CC) biosorbent for the removal of textile dyes from aqueous solutions. Two synthetic dyes Bemacron Blue RS 01 (BB-RS01), a disperse dye, and Bemacid Marine N-5R (BM-N5R), an acid dye were selected for evaluation. The coagulation-flocculation process utilized aluminum sulfate as the coagulant and Superfloc 8396 as the flocculant, with operational parameters including coagulant concentrations ranging from 50 to 600 mg/L, flocculant concentrations between 30 and 125 mg/L, and pH levels spanning from 2 to 11. The corncob biosorbent was characterized using FTIR, SEM, BET, TGA/DTA, and pHpzc analyses. Adsorption isotherm experiments indicated a more favorable correlation with the Langmuir model (R2 = 0.92-0.96), which supports monolayer adsorption. At pH 8, the CFS process achieved a dye removal efficiency of 95.1% for BB-RS01 and 92.3% for BM-N5R was achieved at pH 6.5. The maximum adsorption capacities of BB-RS01 were determined to be 99.5 mg/g, while BM-N5R was found to be 46.08 mg/g. These results indicate that the integration of CFS with raw corncob adsorption provides a cost-effective and efficient method for the remediation of textile dyes.
keywords
ADVANCED OXIDATION PROCESSES; WASTE-WATER TREATMENT; METHYLENE-BLUE DYE; THERMAL-DECOMPOSITION; CATIONIC DYES; RHODAMINE-B; EQUILIBRIUM; CELLULOSE; KINETICS; ORANGE
subject category
Environmental Sciences & Ecology
authors
Rahmoun, HB; Boumediene, M; Ghenim, AN; Da Silva, EF; Labrincha, J
our authors
João António Labrincha Baptista
Full professoracknowledgements
This work was financially supported by the Erasmus + Program (Project: 2020-1-PT01-KA107-077895) and the Algerian Higher Ministry of Education and Scientific Research (PRFU Project, Code: 20001UN01N17A).