Adsorption of Rhodamine B Dye From Aqueous Solution with Modified Active Carbon Made From Pine Cone
نویسندگان
چکیده
Bu çalışmada çam kozalağının pirolizi ile elde edilen aktif karbon, sulu çözeltilerden Rodamin B boyasının gideriminde adsorban olarak kullanılmıştır. Üretilen karbon 4 farklı kimyasal katalizör (ZnCl2, H3PO4, H2SO4 ve KOH) modifiye edilerek, aktivasyon işleminin adsorpsiyon verimliliği üzerine etkisi incelenmiştir. Adsorpsiyon deneyleri kesikli sistemde çalışılmış baslangıç boya konsantrasyonu, temas süresi, pH sıcaklık gibi parametrelerin prosesi araştırılmıştır. Maksimum giderimi pH=3,0’de gözlemlenmiştir. Başlangıçtaki konsantrasyonunun artmasıyla adsorpsiyonu azalmıştır. Temas süresinin B'nin giderim verimi artmıştır yaklaşık 30 dakika içinde dengeye ulaşılmıştır. Aktif karbonun KOH aktivasyonu sonucu en yüksek uzaklaştırma (%49,71) edilmiştir. Deneysel sonuçlar, Langmuir Freundlich izoterm modellerine uygunlukları açısından Korelasyon katsayılarına göre modelinin bu deneysel verilere daha uygun olduğu bulunmuştur. Hesaplanan termodinamik parametrelerle birlikte mekanizması açıklanmaya çalışılmıştır. Buna pozitif ∆G değerleri prosesinin kendiliğinden olmadığını, ∆H ∆S ise endotermik rastgele olduğunu göstermiştir.
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ژورنال
عنوان ژورنال: Politeknik dergisi
سال: 2023
ISSN: ['1302-0900', '2147-9429']
DOI: https://doi.org/10.2339/politeknik.989900