Enrichment of copper and nickel with solid phase extraction using multiwalled carbon nanotubes modified with Schiff bases
Dogan Calhan, Selda
The behaviour of some Schiff bases in the presence of metal ions is very selective in complex formation. In this study, new, selective and easily prepared adsorbent materials have been developed. Multiwalled carbon nanotubes (MWCNTs) are quite suitable as supporting material for preparation of new solid phase adsorbents modified with Schiff bases due to their selective nature. Different Schiff bases were designed and synthesised as adsorbent agents for Ni(II) and Cu(II) ions, according to the literature, and MWCNTs were modified with these Schiff bases. The modification of CNTs was performed by adsorption from the alcoholic solution of Schiff base. The measurements of Ni(II) and Cu(II) ions were carried out using ICP-MS. Different parameters such as pH, model and eluent solution flow rates...
EFFECTS OF COPPER AND LEAD ON SOME HEMATOLOGICAL PARAMETERS OF Oreochromis niloticus
Çiftçi, Nuray | Karayakar, Fahri | Ay, Özcan | Cicik, Bedii
Effects of sub-lethal concentrations of copper and lead on hematocrit and mean cell volume (MCV) levels and on erythrocyte numbers, erythrocyte and erythrocyte nucleus areas were determined after exposing Oreochromis niloticus to 4 ppm Cu and 0.2 ppm Pb over 7, 15 and 30 days. Micro-hematocrit methods were adopted in determining hematocrit levels and microscopic methods were used to determine MCV, erythrocyte numbers, erythrocyte and erythrocyte nucleus areas. Hematocrit and MCV levels and erythrocyte and nucleus areas increased significantly (P
Accumulation of copper in liver, gill and muscle tissues of Anguilla anguilla (Linnaeus, 1758).
Karayakar, Fahri | Cicik, Bedii | Ciftci, Nuray | Karaytug, Sahire | Ay, Özcan
Accumulation of copper in liver, gill and muscle tissues of Anguilla anguilla was studied after exposing the animals to 1.00, 2.00 and 4.00 ppm Cu over 96 h period. The levels of metals in the studied tissues were determined using atomic absorption spectrophotometric techniques. All the copper concentrations tested increased the tissue levels of the metal significantly in liver and gill tissues compared to control fish while metal accumulation in muscle tissue was statistically significant only at 4.00 ppm Cu. Accumulation of the metal in gill tissue showed no difference between the concentrations tested despite the differences observed in liver and muscle tissues. Accumulation of the metal was highest in liver tissue and lowest in muscle tissue.