Tugba SENTURK, Sukran YILDIZ

Canlı İki Yeşil Mikroalg Üzerinde Nikel (II), Antimon (III), Mangan (II) ve Bakır (II)’ın Dörtlü Adsorpsiyon Etkisi

Bu çalışmada, Chlorella ve Scenedesmus algleri kullanılarak sulu çözeltilerden Ni, Sb, Mn ve Cu adsorpsiyonunun araştırılması amaçlanmıştır. 24 saat inkübasyon süresi boyunca çoklu metal sulu çözeltiden canlı iki mikro alg suşu üzerinde nikel (Ni+2), antimony (Sb+3), mangan (Mn+2) ve bakırın (Cu+2) yarışmalı adsorpsiyon verimliliği incelenmiştir. Metal uygulaması sonrasında, klorofil a-b, toplam karbonhidrat ve atomik kuvvet mikroskobu (AFM) görüntülemesi analiz edilmiştir. Metal iyonlarının adsorpsiyon izoterm modelleri Langmuir ve Freundlich izotermlerine göre belirlenmiştir. Çoklu metal sisteminin Scenedesmus hücreleri tarafından sırasıyla antimon: 10.82 mgg-1, mangan: 7.07 mgg-1, bakır: 27.09 mgg-1 ve nikel: 9.71 mgg-1 (Cu>Sb>Ni>Mn) olarak belirlenirken Chlorella için adsorbsiyon kapasitesi antimon: 6.47 mgg-1, mangan: 5.96 mg g-1, bakır: 28.57 mgg-1 ve nikel: 10.71 mgg-1 (Cu>Ni>Sb>Mn) olarak belirlenmiştir. AFM görüntülerine göre, ağır metallere maruz bırakılmış iki algin hücre duvarında, maruz bırakılmamış hücrelere kıyasla deformasyon tespit edilmiştir. Bu çalışma için Freundlich adsorbsiyon modeli 1/n değerinin 1’den küçük olmasıyla tüm metal iyonları için uygundur. Sonuç olarak, çalışmada elde edilen sonuçlar değerlendirildiğinde, Chlorella ve Scenedesmus hücrelerinin, dört ağır metali, özellikle Cu adsorpsiyonunun yüksek verimliliği nedeniyle, Cu+2 iyonlarının sulu çözeltilerden uzaklaştırılmasında etkili bir adsorbent olduğunu ortaya koymuştur.

Quaternary Adsorption Effect of Nickel (II), Antimony (III), Manganese (II) and Copper (II) onto Living Two Green Microalgae

This study aimed to investigate Ni, Sb, Mn and Cu adsorption from aqueous solution by Chlorellaand Scenedesmus algae. The competitive adsorption efficiency of nickel (Ni2+), antimony (Sb3+), manganese(Mn2+) and copper (Cu2+) onto two living microalgae strains was studied from multi-metal aqueous solution for24h incubation time. After exposure, chlorophyll a-b, total carbohydrate and Atomic force microscopy (AFM)imaging were performed. Then adsorption isotherms models of metal ions were determined based on Langmuirand Freundlich isotherms. The adsorption capacity in multi-metal system was determined 6.47 mgg-1 forantimony, 5.96 mgg-1 for manganese, 28.57 mgg-1 for copperand 10.71 mgg-1 for nickel (Cu>Ni>Sb>Mn) byChlorella respectively, whereas, and 10.82 mg g-1 for antimony, 7.07 mgg-1 for manganese, 27.09 mgg-1 forcopper and 9.71 mgg-1 for nickel(Cu>Sb>Ni>Mn) by Scenedesmus cells. According to AFM images,deformation was detected in two algae cell walls treated with heavy metals compared to untreated cells. For thisstudy, Freundlich adsorption model best fitted the data for all metal ions with 1/n value

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