Investigation of Copper Removal by Conditioned Zeolite - Clinoptilolite Mineral

Year 2023, , 97 - 113, 15.03.2023

İlknur Şentürk

https://doi.org/10.31466/kfbd.1179342

Abstract

In this study, Cu(II) removal with three different types of clinoptilolite, which is natural (H-Zt), chemically conditioned (KOH-Zt), and loaded with Fe3O4 magnetic nanoparticles after chemical conditioning (KOH-Zt/Fe3O4), was investigated depending on concentration and pH in the first step. Then, the studies were continued with the adsorbent KOH-Zt with the best efficiency, and the effects of contact time, initial metal concentration, adsorbent dosage, and temperature were investigated. It was observed that chemical conditioning with KOH was more effective in removing Cu(II) and 77.61% removal was achieved at 30 mg/L Cu(II) concentration. Maximum Cu(II) adsorption capacity is 8.91 mg/g at 50 mg/L Cu(II) concentration. It was understood that the Langmuir isotherm model best describes the adsorption equilibrium. Adsorption kinetic data is compatible with second-order reaction kinetics. Thermodynamic calculations show that adsorption is spontaneous and endothermic. All the data obtained from the study show that the KOH-Zt adsorbent obtained after chemical conditioning applied on clinoptilolite, which is an effective and inexpensive adsorbent, is preferable for Cu(II) adsorption.

Keywords

Adsorption, Copper, Clinoptilolite, Conditioning, Isotherm, Kinetics

Şartlandırılmış Zeolit - Klinoptilolit Minerali ile Bakır Gideriminin Araştırılması

Abstract

Bu çalışmada ilk etapta doğal (H-Zt), kimyasal şartlandırma yapılmış (KOH-Zt) ve şartlandırma sonrası Fe3O4 manyetik nanopartiküller ile yükleme yapılmış (KOH-Zt/Fe3O4) olmak üzere üç farklı klinoptilolit ile Cu(II) giderimi konsantrasyon ve pH’ya bağlı olarak araştırılmıştır. Ardından en iyi verim alınan adsorbent KOH-Zt ile çalışmalara devam edilerek, temas süresi, başlangıç metal konsantrasyonu, adsorbent dozajı ve sıcaklığın etkisi araştırılmıştır. KOH ile kimyasal şartlandırma işleminin Cu(II) gideriminde daha etkili olduğu, 30 mg/L Cu(II) konsantrasyonunda %77,61 giderim sağlandığı görülmüştür. Maksimum Cu(II) adsorpsiyon kapasitesi 50 mg/L Cu(II) konsantrasyonunda 8,91 mg/g’dır. Langmuir izoterm modelinin adsorpsiyon dengesini en iyi tanımladığı anlaşılmıştır. Adsorpsiyon kinetik verisi ikinci derece reaksiyon kinetiği ile uyumludur. Termodinamik hesaplar adsorpsiyonun kendiliğinden ve endotermik olduğunu göstermektedir. Çalışmadan elde edilen tüm veriler etkili ve ucuz bir adsorbent olan klinoptilolit üzerine uygulanan kimyasal şartlandırma sonrası elde edilen KOH-Zt adsorbentin, Cu(II) adsorpsiyonu için tercih edilebilir olduğunu göstermektedir.

Keywords

Adsorpsiyon, Bakır, Klinoptilolit, Şartlandırma, İzoterm, Kinetik

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