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

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

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