Removal of naproxen from wastewater using chitosan–aerogel–activated carbon biocomposites: Theory, equilibrium, kinetics, thermodynamics, and process optimization

Abstract

This study investigated the performance of chitosan–aerogel–activated carbon (CHT:AEO:AC) biocomposite as an adsorbent for the removal of naproxen from wastewater. Naproxen removal in % was 99, 33, 62, and 90 using 300 mg of raw AC, raw CHT, CHT:AEO, and CHT:AEO:AC, respectively. Langmuir, Freundlich, Dubinin–Radushkevich (D–R), and Temkin isotherm models were used to obtain adsorption isotherms. Chi‐squared (χ2) and correlation coefficients (R2) values showed that the parameters of the Freundlich, Temkin, and D–R models were more suitable for naproxen adsorption than the Langmuir model for raw CHT, CHT:AEO, and CHT:AEO:AC, whereas the Langmuir model fitted well for raw AC. The adsorption of naproxen onto biocomposites was defined by pseudo‐second‐order kinetic model, and adsorption rate constants were 0.245, 0.036, 0.075, and 0.147 mg g−1 min−1 for raw AC, raw CHT, CHT:AEO, and CHT:AEO:AC, respectively. The impact of optimum process conditions on naproxen adsorption was explored using response surface methodology. The optimum independent variables were 288.94 mg, 29.64°C, and 372.5 min, leading to a rate of naproxen removal onto CHT:AEO:AC of 90.29%. Practitioner Points Naproxen adsorption from wastewater using chitosan–aerogel–activated carbon biocomposite (CHT:AEO:AC) was investigated. The effects of the amount of biocomposite, temperature, and time on the adsorption were investigated. Optimization of the process conditions was carried out using the response surface methodology.

Emission rates, ALOHA simulation and Box-Behnken design of accidental releases in butyl acrylate tank - case study

“…The R 2 values of 0.95 indicated that the models were statistically significant and 95% of the total variance in the threat zones was explained by the model. Also, the difference between the R 2 adj and R 2 pre values less than 0.1 was acceptable (Table 6) (Ozcan et al, 2022). It is obvious that the case in which these two values were close to each other is applicable for quadratic model only.…”

“…The independent variables consisted of the temperature (A) (0-30°C), wind speed (B) (1-7 m/s), and filling ratio of the tank (C) (20-80%). The central point conditions of the process variables were selected to be 15 °C for temperature (A), 4 m/s for wind speed (B), and 50% for filling ratio of the tank (C) (Ozcan et al 2022).…”

Nanostructured Aerogel Materials for removal of Antibiotic from Contaminated Environment: A Review

“…The monolayer adsorption was 294.12 mg/g with 5 times of reusing facility. The abundant function groups and extended surface area (241.41 m 2 /g) were promoted the adsorption rate through synergetic actions of hydrogen bonding and electrostatic attraction between DCF molecules and the surface of functional Cell@PEI [26].Ozcan et al, [27] was utilized a chitosan-based bio-aerogel fabricated by incorporation of activated carbon for removal of naproxen from wastewater. The aerogel was good adsorbent with 90 % of removal capacity and 4 successive regenerations.…”