BIOLOGICAL TREATMENT OF SOME ESSENTIAL METALS BY USING CHLORELLA VULGARIS

Yıl 2018, Cilt: 16 Sayı: 1/2, 197 - 208, 16.05.2018

Tuğba Şentürk , Şükran Yıldız

Öz

                Ağır metal kirliliği bugün en önemli çevre
sorunlarından biridir. Esansiyel elementler organizmalar tarafından hayatlarını
sürdürmek için metabolizma faaliyetlerinde kullanılan elementlerdir. Bu elementlerin
bulunmaması homeostazi dengesizliğine neden olur. Bakır, çinko, kobalt,
manganez ve molibden, antropojenik yollarla besin zincirine girerek ciddi
sağlık tehlikesi oluşturan esansiyel ağır metallerdir. Bu çalışma canlı C.
vulgaris (Chlorophyta) mikroalgini kullanarak 0.5; 1; 2.5; 5 ve 10 ppm
konsantrasyonlu sulu solüsyonlardan Cu (II), Co (II), Zn (II), Mo (VI) ve Mn
(II) ağır metallerinin giderim kapasitesinin belirlenmesini amaçlamaktadır. Deneyler
sırasıyla CuSO₄.5H₂0, CoSO₄.7H₂0,
ZnSO₄.H2O, Na2MoO₄.2H₂0 ve MnCl₂.4H₂0
analitik derecedeki kimyasal reaktiflerden hazırlanan Cu, Co, Zn, Mo ve Mn
sentetik tek metal çözeltileri kullanılarak gerçekleştirildi. Deneysel verilere
dayanarak, Chlorella hücreleri tarafından Cu (II), Co (II), Zn (II), Mo (VI) ve
Mn (II) için ortalama adsorpsiyon kapasiteleri, sırasıyla 241.006, 238.120,
237.033, 223.396 ve 54.899 mg/g olarak belirlenmiştir. Elde edilen sonuçlar,
alg hücrelerini kullanan bu biyosorpsiyon sistemlerinin, kirli sulu ortamlardan
ağır metal iyonlarının uzaklaştırılması için umut verici bir alternatif
olduğunu göstermiştir.

Anahtar Kelimeler

Essential elements, Water pollution, Toxic wastes, Biological treatment, Metal removal

Kaynakça

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