Dual-functional utilization of Tamarix tetrandra: Biomass-based adsorption of methylene blue and antioxidant capacity assessment
Journal of the Indian Chemical Society, cilt.103, sa.9, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 103 Sayı: 9
- Basım Tarihi: 2026
- Doi Numarası: 10.1016/j.jics.2026.102886
- Dergi Adı: Journal of the Indian Chemical Society
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, EMBASE
- Anahtar Kelimeler: Adsorption, Antioxidant capacity, Biomass, Methylene blue, Tamarix tetrandra
- Yıldız Teknik Üniversitesi Adresli: Evet
Özet
The development of sustainable and low-cost bioresources for wastewater treatment and the recovery of value-added compounds has gained considerable attention in recent years. In this context, this study aimed to evaluate the stem and leaf biomasses of Tamarix tetrandra as multifunctional materials for both methylene blue (MB) removal from aqueous solutions and natural antioxidant recovery. The stem and leaf biomasses exhibited pHpzc values of 5.08 and 5.83, respectively, and negative zeta potentials of −17.4 and −16.6 mV. Under optimum conditions (0.05 g/50 mL adsorbent dosage, pH 7, 30 min contact time, and 298 K), maximum MB removal efficiencies reached 96.6% for stems and 92.5% for leaves. Equilibrium data were best described by the Langmuir model (R2 = 0.9946–0.9996), yielding monolayer adsorption capacities of 55.23 mg/g for stems and 45.25 mg/g for leaves at 298 K. Compared with many previously reported lignocellulosic biosorbents, T. tetrandra biomass exhibited competitive adsorption performance while simultaneously providing valuable antioxidant activity, demonstrating a unique dual-functional utilization strategy that supports both wastewater remediation and natural antioxidant recovery. Adsorption kinetics followed the pseudo-second order model with excellent agreement (R2 > 0.9999). Thermodynamic studies revealed that MB adsorption was spontaneous (ΔG° = −30.75 to −30.61 kJ/mol for stems and −29.44 to −29.65 kJ/mol for leaves) and exothermic, with ΔH° values of −32.76 and −26.28 kJ/mol for stems and leaves, respectively. Antioxidant assays showed that stem extracts possessed higher bioactivity than leaf extracts, with total phenolic contents of 104.33 ± 1.20 and 45.72 ± 0.67 μg pyrocatechol equivalent mg−1 extract, DPPH radical scavenging activities of 80.40 ± 0.59% and 39.25 ± 0.60% at 60 μg/mL, and CUPRAC values of 189.38 ± 3.81 and 82.60 ± 0.23 μg Trolox equivalent mg−1 extract, respectively.