Removal of Cu(II) ions from aqueous solutions using sunflower stalk biochar prepared with sulfuric acid

Yıl 2025, Cilt: 7 Sayı: 3, 292 - 299, 30.09.2025

Mustafa İmamoğlu , Süleyman Uzun

https://doi.org/10.51435/turkjac.1707210

Öz

In this study, sunflower stalk biochar was fabricated using sulfuric acid as a novel sorbent material for the removal of Cu(II) ions from aqueous solutions. The material was characterized by proximate analysis, FT-IR and SEM-EDS. Its moisture content, volatile matter content and ash was found to be 10.6%, 35.3% and 9.3%, respectively. BET surface area was found to be 9 m2g-1. EDS analysis showed 60.17% of C and 35.48% O on the surface of the material. The presence of phenolic and acidic hydroxyl groups in the material structure was confirmed By FT-IR. The removal of Cu(II) from aqueous solutions by batch method was investigated by examining of effective factors such as pH of the aqueous phase, biochar dosage, initial Cu(II) concentration, agitation time. The adsorption studies of Cu(II) with AYBK was found to be highly pH-depended which is maximum at pH 5.0 by reaching to equilibrium at 300 min. The increasing of the dosage caused a percent removal of Cu(II), and the increase in the initial Cu(II) concentration caused a rise in the adsorbed amount of Cu(II) per gram of sunflower stalk biochar . The adsorption of Cu(II) onto sunflower stalk biochar followed well with pseudo- second-order model and the equilibrium conditions well defined by Langmuir isotherm with a maximum adsorption capacity of 182.2 mg/g. It was concluded that sunflower stalk biochar could be very useful for the removal of Cu(II) ions from aqueous solutions.

Anahtar Kelimeler

Removal , Cu(II) , biochar , sunflower stalk , adsorption , kinetic , isotherm

Proje Numarası

BAPK-2024-26-62-4

Removal of Cu(II) ions from aqueous solutions using sunflower stalk biochar prepared with sulfuric acid

Öz

Bu çalışmada, ayçiçeği sapı biyokömürü, sulu çözeltilerden Cu(II) iyonlarının uzaklaştırılması için yeni bir sorbent malzeme olarak sülfürik asit kullanılarak üretilmiştir. Malzeme, yaklaşık analiz, FT-IR ve SEM-EDS ile karakterize edilmiştir. Nem içeriği, uçucu madde içeriği ve külün sırasıyla %10,6, %35,3 ve %9,3 olduğu bulunmuştur. BET yüzey alanı 9 m2g-1 olarak bulundu. EDS analizi, malzeme yüzeyinde %60,17 C ve %35,48 O gösterdi. Malzeme yapısında fenolik ve asidik hidroksil gruplarının varlığı FT-IR ile doğrulandı. Cu(II)'nin parti yöntemi ile sulu çözeltilerden uzaklaştırılması, sulu fazın pH'ı, biyokömür dozajı, başlangıç ​​Cu(II) konsantrasyonu, çalkalama süresi gibi etkili faktörler incelenerek araştırıldı. Cu(II)'nin AYBK ile adsorpsiyon çalışmalarının pH'a oldukça bağlı olduğu, 300 dakikada dengeye ulaştığı pH 5,0'da maksimum olduğu bulundu. Dozajın artması Cu(II)'nin yüzde olarak uzaklaştırılmasına neden oldu ve başlangıç ​​Cu(II) konsantrasyonundaki artış, ayçiçeği sapı biyokömürünün gramı başına adsorbe edilen Cu(II) miktarında bir artışa neden oldu. Cu(II)'nin ayçiçeği sapı biyokömürüne adsorpsiyonu, psödo-ikinci derece model ve maksimum 182,2 mg/g adsorpsiyon kapasitesine sahip Langmuir izotermi tarafından iyi tanımlanmış denge koşulları ile iyi bir şekilde takip edildi. Ayçiçeği sapı biyokömürünün sulu çözeltilerden Cu(II) iyonlarının uzaklaştırılması için çok yararlı olabileceği sonucuna varıldı.

Anahtar Kelimeler

Uzaklaştırma , Cu(II) , biyokömür , ayçiçeği sapı , adsorpsiyon , kinetik , izoterm.

Destekleyen Kurum

Sakarya University Scientific Research Projects Coordination Office

Proje Numarası

BAPK-2024-26-62-4

Kaynakça

• M. Zhang, G. Liu, R. Liu, J. Xu, W. Si, Y. Wei, High-efficient co-removal of copper and zinc by modified biochar derived from tea stalk: Characteristics, adsorption behaviors, and mechanisms, J Water Process Eng, 57, 2024, 104533.
• Y. Liu, H. Wang, Y. Cui, N. Chen, Removal of copper ions from wastewater: a review, Int J Environ Res Public Health, 20(5), 2023, 3885.
• N.H. Ab Hamid, M.I.H. bin Mohd Tahir, A. Chowdhury, A.H. Nordin, A.A. Alshaikh, M.A. Suid, A.I. Rushdan, The current state-of-art of copper removal from wastewater: A review, Water, 14(19), 2022, 3086.
• Ç. Özer, M. İmamoğlu, Removal of ciprofloxacin from aqueous solutions by pumpkin peel biochar prepared using phosphoric acid, Biomass Convers Biorefin, 14(5), 2024, 6521-6531.
• N.T. Chung, D.T. Thuy, L.H. Trang, N.T. Vu, Evaluating coffee husk biochar as a sustainable and novel adsorbent for lead and copper in wastewater, Biomass Convers Biorefin, 2025, 1-17.
• J. García-Elías, A. Ochoa-Terán, E.A. López-Maldonado, S. Pérez-Sicairos, B. Trujillo-Navarrete, I.A. Rivero, S.D. Ramírez-Zatarain, Adsorption properties of Merrifield-bCCA chelating resins: a new alternative for Pb²⁺ removal from water, RSC Adv, 15(12), 2025, 8999-9016.
• P. Rostami, M.R. Moradi, M.A. Pordsari, A. Ghaemi, Carboxylic acid functionalized para-xylene based hypercrosslinked polymer as a novel and high performance adsorbent for heavy metal removal, Arab J Chem, 17(4), 2024, 105634.
• V.B. Lunardi, S.P. Santoso, A.E. Angkawijaya, K.C. Cheng, P.L. Tran-Nguyen, A.W. Go, S. Ismadji, Synthesis of cellulose hydrogel by utilizing agricultural waste and zeolite for adsorption of copper metal ions, Ind Crops Prod, 210, 2024, 118179.
• A. Munyengabe, M. Banda, W. Augustyn, K. Netshiongolwe, D. Ramutshatsha-Makhwedzha, Application of coal fly ash for trace metal adsorption from wastewater: a review, Heliyon, 10(10), 2024, e31494.
• A. Gundogdu, C. Duran, H.B. Senturk, M. Soylak, M. İmamoğlu, Y. Onal, Physicochemical characteristics of a novel activated carbon produced from tea industry waste, J Anal Appl Pyrolysis, 104, 2013, 249-259.
• Ç. Özer, M. İmamoğlu, Isolation of nickel (II) and lead (II) from aqueous solution by sulfuric acid prepared pumpkin peel biochar, Anal Lett, 56(3), 2023, 491-503.
• A. Gundogdu, P. Bozbeyoglu, M. İmamoğlu, C. Baltaci, C. Duran, V.N. Bulut, Characterization of the adsorption mechanism of cadmium (II) and methylene blue upon corncobs activated carbon, Anal Lett, 56(3), 2023, 433-448.
• N. Öztürk, M. Yazar, A. Gündoğdu, C. Duran, H. Senturk, M. Soylak, Application of cherry laurel seeds activated carbon as a new adsorbent for Cr (VI) removal, Membr Water Treat, 12(1), 2021, 11-21.
• Z. Alakayleh, Sulfuric acid-activated carbon from guava leaves for paracetamol adsorption, Results Eng, 25, 2025, 103685.
• M.A. El-Nemr, M. Yılmaz, S. Ragab, A. El Nemr, Biochar-SO prepared from pea peels by dehydration with sulfuric acid improves the adsorption of Cr6+ from water, Biomass Convers Biorefin, 14(2), 2024, 2601-2619.
• W. Musie, G. Gonfa, S.V. Prabhu, Adsorption studies of sodium ions from aqueous solution with natural and sulfuric acid-treated bean seed husk, Water Air Soil Pollut, 234(3), 2023, 170.
• D. Bal, Ç. Özer, M. İmamoğlu, Green and ecofriendly biochar preparation from pumpkin peel and its usage as an adsorbent for methylene blue removal from aqueous solutions, Water Air Soil Pollut, 232(11), 2021, 457.
• C. Duran, D. Ozdes, A. Gundogdu, M. İmamoğlu, H.B. Senturk, Tea-industry waste activated carbon, as a novel adsorbent, for separation, preconcentration and speciation of chromium, Anal Chim Acta, 688(1), 2011, 75-83.
• M. İmamoğlu, A. Vural, H. Altundag, Evaluation of adsorptive performance of dehydrated hazelnut husks carbon for Pb (II) and Mn (II) ions, Desal Water Treat, 52(37-39), 2014, 7241-7247.
• G. Sun, W. Shi, Sunflower stalks as adsorbents for the removal of metal ions from wastewater, Ind Eng Chem Res, 37(4), 1998, 1324-1328.
• X. Wang, S. Yun, W. Fang, C. Zhang, X. Liang, Z. Lei, Z. Liu, Layer-stacking activated carbon derived from sunflower stalk as electrode materials for high-performance supercapacitors, ACS Sustain Chem Eng, 6(9), 2018, 11397-11407.
• G. Sun, X. Xu, Sunflower stalks as adsorbents for color removal from textile wastewater, Ind Eng Chem Res, 36(3), 1997, 808-812.
• W.D. Zhao, L.P. Chen, Y. Jiao, Preparation of activated carbon from sunflower straw through H3PO4 activation and its application for acid fuchsin dye adsorption, Water Sci Eng, 16(2), 2023, 192-202.
• P. Sun, K. Zhang, J. Gong, A. Khan, M.S. Islama, Y. Zhang, Sunflower stalk–derived biochar enhanced thermal activation of persulfate for high efficient oxidation of p-nitrophenol, Environ Sci Pollut Res, 26(26), 2019, 27482-27493.
• R. Koklu, M. İmamoğlu, Removal of ciprofloxacin from aqueous solution by activated carbon prepared from orange peel using zinc chloride, Membr Water Treat, 13(3), 2022, 129-137.
• L. Sun, S. Wan, W. Luo, Biochars prepared from anaerobic digestion residue, palm bark, and eucalyptus for adsorption of cationic methylene blue dye: characterization, equilibrium, and kinetic studies, Bioresour Technol, 140, 2013, 406-413.
• E.R.I. Mahmoud, H.M. Aly, N. A. Hassan, A. Aljabri, A. L. Khan, H. F. El-Labban, Biochar from date palm waste via two-step pyrolysis: a modified approach for Cu (II) removal from aqueous solutions, Processes 12(6), 2024, 1189.
• R. Saadi, Z. Saadi, R. Fazaeli, N. E. Fard, Monolayer and multilayer adsorption isotherm models for sorption from aqueous media, Korean J Chem Eng, 32(5), 2015, 787-799.
• K. Yadav, M. Raphi, S. Jagadevan, Adsorption of copper (II) on chemically modified biochar: a single-stage batch adsorber design and predictive modeling through artificial neural network, Biomass Convers Biorefin, 14(5), 2024, 6011-6026.
• Z. Liu, C. Dai, Y. Hu, J. Zhang, Y. Wang, L. Zhang, H. Gao, Efficient removal of Cu²⁺ on Medulla Tetrapanacis-based modified biochar: adsorption performance, mechanisms and recycling for fabrication of supercapacitor electrodes, Chem Eng J, 162825, 2025.
• T.M. Nguyen, H.H. Chen, C.C. Yang, Y.P. Tsai, M.Y. Kuo, Y.T. Liao, K.F. Chen, The application of water bamboo (Zizania latifolia) husk-derived biochar for copper-contaminated irrigation water treatment and soil amendment, Environ Sci Water Res Technol, 10(9), 2024, 2048-2061.
• K. Wilson, J. Iqbal, A.O. Obaid Hableel, Z.N.K. Alzaabi, Y. Nazzal, Camel dung-derived biochar for the removal of Copper (II) and Chromium (III) Ions from aqueous solutions: adsorption and kinetics studies, ACS Omega, 9(10), 2024, 11500-11509.
• T.M.A. Babeker, S. Lv, M.N. Khalil, Z. Hao, Q. Chen, Biochar modified by ammonium pyrrolidine dithiocarbamate for high selective adsorption of copper in wastewater, Sep Purif Technol, 354, 2025, 129436.
• A. Eleryan, U.O. Aigbe, K.E. Ukhurebor, R.B. Onyancha, T.M. Eldeeb, M.A. El-Nemr, A. El Nemr, Copper (II) ion removal by chemically and physically modified sawdust biochar, Biomass Convers Biorefin, 14(8), 2024, 9283-9320.
• A.R. Salem, W.A. Kassab, A.M. Adel, M. El-Sakhawy, M.T. Al-Shemy, Insight into the efficient removal of Cu (II) from aqueous solutions on a biochar-alginate composite, Process Saf Environ Prot, 197, 2025, 106985.
• Z. Madzin, I. Zahidi, A. Talei, M.E. Raghunandan, A.A. Hermawan, D.S. Karam, Optimising spent mushroom compost biochar for heavy metal removal: mechanisms and kinetics in mine water treatment, J Water Process Eng, 69, 2025, 106829.
• S. Lagergren, About the theory of so-called adsorption of soluble substances, K. Sven. Vetenskapsakad. Hand 24 (4), 1898, 1–39.
• Y.S Ho, G McKay, Pseudo-second order model for sorption processes, Process Biochemistry 34 (5), 1999, 451–465.