Evaluation of Erodium moschatum (L.) L’Hér biomass as an eco-friendly adsorbent for methylene blue removal: Isotherm, kinetic, and thermodynamic investigations
Process Biochemistry, cilt.169, ss.82-100, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 169
- Basım Tarihi: 2026
- Doi Numarası: 10.1016/j.procbio.2026.07.013
- Dergi Adı: Process Biochemistry
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, BIOSIS, Chemical Abstracts Core, Compendex, INSPEC, Academic Search Ultimate (EBSCO), Engineering Source (EBSCO)
- Sayfa Sayıları: ss.82-100
- Anahtar Kelimeler: Adsorption, Biosorbent, Cationic dye, Isotherm models, Kinetic modeling, Zero-waste valorization
- Yıldız Teknik Üniversitesi Adresli: Evet
Özet
This study investigates the use of Erodium moschatum (L.) L’Hér biomass as a novel, sustainable, and low-cost biosorbent for methylene blue (MB) removal from wastewater. Batch experiments conducted at 298–318 K showed a maximum removal efficiency of 80.47% under optimum conditions (pH 7, 0.05 g/50 mL, 45 min). The adsorption followed the Langmuir isotherm with a qm of 449.3 ± 9.0 mg/g at 298 K, indicating monolayer adsorption. Kinetic analysis revealed that the pseudo-second order adequately described the adsorption rate, while additional kinetic models supported a multi-step process involving surface interactions and intraparticle diffusion. Thermodynamic parameters (ΔG° = –21.02 ± 0.63 to –21.84 ± 0.66 kJ/mol, ΔH° = –8.817 ± 0.265 kJ/mol) indicated that the process was spontaneous, exothermic, and predominantly governed by physisorption. The adsorption mechanism is mainly governed by electrostatic attraction and hydrogen bonding, while π–π interactions may have provided an additional contribution to MB uptake. Compared to reported biosorbents, E. moschatum exhibits a favorable combination of high adsorption capacity (449.3 ± 9.0 mg/g) and relatively rapid adsorption kinetics (45 min), highlighting its practical potential for efficient wastewater treatment. Additionally, adsorption tests performed in different water matrices showed that the biosorbent retained substantial removal efficiencies (64.6–80.5%), further supporting its applicability for practical wastewater treatment scenarios.