TY  - JOUR
T1  - Magnetic biochar derived from olive pomace for efficient tetracycline  removal from water
TT  - Zeytin Posasından Türetilen Manyetik Biyochar ile Sudan Tetrasiklinin Etkin Giderimi
AU  - Kabak, Burcu
PY  - 2025
DA  - September
Y2  - 2025
DO  - 10.51435/turkjac.1699857
JF  - Turkish Journal of Analytical Chemistry
JO  - TurkJAC
PB  - Miraç OCAK
WT  - DergiPark
SN  - 2687-6698
SP  - 268
EP  - 281
VL  - 7
IS  - 3
LA  - en
AB  - The uncontrolled release of tetracycline (TC), a widely used antibiotic, poses a significant threat to aquatic ecosystems owing to its persistence and contribution to antibiotic resistance. In this study, a biochar adsorbent was synthesised from olive pomace (OBC) and further magnetically modified (MOBC) to enhance its removal efficiency for TC in water. The adsorbents were extensively characterised using FTIR, XRD, BET, TGA, and FESEM-EDX. Batch adsorption experiments were conducted to evaluate the influence of pH, dosage, contact time, temperature, and concentration on removal performance. MOBC exhibited a superior adsorption capacity (248.77 mg/g at 25 °C) and faster kinetics than raw biochar, mainly due to improved surface area, porosity, and magnetic functionality. The adsorption process followed pseudo-first-order kinetics and was best described using the Langmuir isotherm model. Thermodynamic analysis revealed that the process is spontaneous and exothermic, with physical interactions dominating the adsorption mechanism. The MOBC demonstrated promising reusability with high desorption efficiency using NaOH and maintained substantial performance in real water matrices. These results highlight MOBC as a low-cost, sustainable, and efficient adsorbent for pharmaceutical contaminant removal in environmental remediation applications.
KW  - Olive Pomace
KW  - Tetracycline Removal
KW  - Magnetic Functionalization
KW  - Water Treatment
KW  - Biochar
KW  - Adsorption
N2  - Yaygın olarak kullanılan bir antibiyotik olan tetrasiklinin (TC) kontrolsüz salınımı, kalıcılığı ve antibiyotik direncine katkıda bulunması nedeniyle su ekosistemleri için önemli bir tehdit oluşturmaktadır. Bu çalışmada, zeytin posasından (OBC) biyokömür adsorban sentezlenmiş ve su içerisindeki TC giderim verimliliğini artırmak amacıyla manyetik olarak modifiye edilmiştir (MOBC). Adsorbanlar, FTIR, XRD, BET, TGA ve FESEM-EDX yöntemleriyle kapsamlı şekilde karakterize edilmiştir. pH, dozaj, temas süresi, sıcaklık ve konsantrasyon gibi parametrelerin giderim performansı üzerindeki etkilerini değerlendirmek için seri adsorpsiyon deneyleri gerçekleştirilmiştir. MOBC, artırılmış yüzey alanı, gözeneklilik ve manyetik özellikleri sayesinde ham biyokömüre göre daha yüksek adsorpsiyon kapasitesi (25 °C’de 248,77 mg/g) ve daha hızlı adsorpsiyon kinetiği sergilemiştir. Adsorpsiyon süreci, yalancı birinci dereceden kinetik modele uymuş ve en iyi Langmuir izoterm modeli ile açıklanmıştır. Termodinamik analiz, işlemin kendiliğinden gerçekleşen ve ekzotermik olduğunu, adsorpsiyon mekanizmasında ise fiziksel etkileşimlerin baskın rol oynadığını ortaya koymuştur. MOBC, NaOH kullanılarak yüksek desorpsiyon verimi ile umut verici bir yeniden kullanılabilirlik göstermiş ve gerçek su örneklerinde de önemli performansını korumuştur. Bu sonuçlar, MOBC’nin çevresel iyileştirme uygulamalarında farmasötik kirleticilerin giderimi için düşük maliyetli, sürdürülebilir ve etkili bir adsorban olduğunu göstermektedir.
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UR  - https://doi.org/10.51435/turkjac.1699857
L1  - https://dergipark.org.tr/en/download/article-file/4872649
ER  -