Tannic acid/polyetheramine-functionalized carbon microfiber cloth membrane coated polyaniline for uric acid remediation and sensing application
Chemical Engineering Journal, cilt.544, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 544
- Basım Tarihi: 2026
- Doi Numarası: 10.1016/j.cej.2026.179234
- Dergi Adı: Chemical Engineering Journal
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, BIOSIS, Chemical Abstracts Core, Chimica, Compendex, INSPEC, Academic Search Ultimate (EBSCO), Engineering Source (EBSCO)
- Anahtar Kelimeler: Carbonized microfiber, Electrochemical sensing, Optimization, Uric acid, Water treatment
- Kocaeli Üniversitesi Adresli: Evet
Özet
Uric acid (UA), a major constituent of urine-derived wastewater and agricultural fertilizers, poses environmental concerns due to its persistence and potential ecological impacts. In this study, a low-cost multifunctional membrane based on carbonized microfiber functionalized with tannic acid/polyetheramine and coated with stabilized polyaniline (CM–TA/TJ–PANI) was developed for simultaneous UA removal and electrochemical sensing. FTIR, SEM, XRD, TGA, and EDX analyses confirmed successful membrane fabrication and surface modification. Process optimization using Design of Experiments identified optimal adsorption conditions at pH 7, 40 °C, and a membrane dosage of 5 mg. Adsorption equilibrium was reached within 180 min and was best described by the pseudo-second-order kinetic model (R2 = 0.989) supported by particle diffusion- process, indicating a physicochemisorption-controlled mechanism. Non-linear isotherm analysis and statistical error evaluation identified the Temkin model as the best fit, while the Freundlich model provides complementary evidence of surface heterogeneity. In addition, the membrane achieved an overall maximum adsorption capacity of 1150.8 mg/g and 94% removal percentage. Thermodynamic studies revealed a spontaneous and endothermic process, and the membrane retained >92% efficiency after six regeneration cycles. Electrochemical measurements showed a linear detection range of 29–1784 μM (5–300 mg/L), a sensitivity of 0.0486 μA μM−1 cm−2, and a detection limit of 49.88 μM (≈8.38 mg/L). The sensor maintained 98.9% of its initial response after 40 cycles, demonstrating excellent anti-fouling stability. These results highlight the prepared membrane as an efficient and sustainable capture-and-detect platform for UA monitoring and remediation in water systems.