Pharmaceutical pollutants adsorption onto activated carbon: isotherm, kinetic investigations and DFT modeling approaches

Kebir, Mohammed; Bourzami, Riadh; Nasrallah, Noureddine; Lebouachera, Seif El Islam; Dergal, Fayçal; Ladji, Riad; Trari, M.; Harharah, Hamed N.; Jery, Atef El; Azzaz, Ahmed Amine; Khezami, Lotfi

doi:10.5802/crchim.161

Cited by 7 publications

(2 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The calculation of the separation factor (R L ) may offer information on whether the studied adsorption process is favorable or not. Generally, if the separation factor ranges between 0 and 1, then the studied adsorption process is favorable [46,[50][51][52]. In our experiments, the separation factor R L was found to be in the range of 0.017-0.024 (Table 3).…”

Section: Cation T (K)mentioning

confidence: 58%

See 1 more Smart Citation

Oxidized Biomass and Its Usage as Adsorbent for Removal of Heavy Metal Ions from Aqueous Solutions

Condurache¹,

Cojocaru²,

Samoilă³

et al. 2022

Molecules

View full text Add to dashboard Cite

Nowadays, very coarse wool fibers are considered waste biomass and are discarded at random or burned. Therefore, it is of actual interest to valorize coarse wool fibers as utile products. In this sense, we report herein an environmentally-friendly process for the preparation of a new material based on oxidized wool fibers and designed for efficient adsorption of heavy metals from wastewater. The morphology and the structure of the obtained product were characterized by scanning electron microscopy (SEM) coupled with an X-ray energy-dispersive module (EDX) and by Fourier-transform infrared spectroscopy (FTIR). Likewise, the performances of the oxidized wool fibers for the adsorption of heavy metal cations (Cu2+, Cd2+, Pb2+) from aqueous solutions were tested. The adsorption kinetics data were analyzed by applying the pseudo-first-order (PFO) and pseudo-second-order (PSO) kinetic models. The equilibrium of the adsorption process was investigated by using the Freundlich and Langmuir isotherm models. According to the Langmuir isotherms registered at 300 K, the maximum adsorption capacities of the oxidized wool were found to increase from Cu2+ (9.41 mg/g) and Cd2+ (10.42 mg/g) to Pb2+ (30.71 mg/g). Consequently, the removal efficiency of metal ions was found to vary in the range of 96.8–99.7%. The thermodynamic parameters (e.g., enthalpy, entropy, and Gibbs free energy) were calculated and discussed.

show abstract

Section: Cation T (K)mentioning

confidence: 58%

“…Freundlich Isotherm Langmuir Isotherm K F (mg/g)(L/g) Further analysis of the Langmuir equation may allow the calculation of the dimensionless parameter (R L ) for equilibrium, also known as the separation factor, which may be expressed by Equation ( 6) [46,[50][51][52]:…”

Section: Cation T (K)mentioning

confidence: 99%