Yalçın Tepe

Determination of metal contaminations in sea foods from Marmara, Aegean and Mediterranean seas: Twelve fish species

The concentrations of cadmium, cobalt, chromium, copper, iron, manganese, nickel, lead and zinc were determined by ICP-AES in muscles and livers of 12 fish species sampled from the Marmara, Aegean and Mediterranean seas of Turkey. Iron showed the highest levels in examined tissues of all fish species. Following Fe, Zn generally showed the second highest levels. Metal concentrations in edible parts of fish species were 0.02-0.37mgkg(-1) for cadmium, 0.04-0.41mgkg(-1) for cobalt, 0.04-1.75mgkg(-1) for chromium, 0.32-6.48 mgkg(-1) for copper, 7.46-40.1mgkg(-1) for iron, 0.10-0.99 mgkg(-1) for manganese, 0.02-3.97mgkg(-1) for nickel, 0.33-0.86mgkg(-1) for lead, 4.49-11.2mgkg(-1) for zinc, respectively. All metal concentrations in livers were higher than those in muscles. In some stations, cadmium and chromium concentrations in both muscles and livers, and lead levels in livers of the examined species were higher than permissible safety levels for human uses.

Assessment of heavy metal contamination in various tissues of six ray species from İskenderun Bay, northeastern Mediterranean Sea.

This study was performed to investigate the heavy metal concentrations in muscle, liver, gill and intestine of six ray species from İskenderun Bay. The present study is the first for rays in İskenderun Bay, providing valuable preliminary information about heavy metal contents in different tissues of the examined ray species from the bay, and indirectly, indicating the environmental contamination of İskenderun Bay. Heavy metal levels in intestines were generally higher than those in other tissues for all species. Metal levels in ray muscle tissue were below the international maximum allowable levels for fish and fishery products, as well as Turkish national guidelines, with the exception of the highest value for Cd in Dasyatis pastinaca.

Comparison of Metal Levels in Different Tissues of Seven Ray Species from Antalya Bay, Mediterranean Sea

The aim of this study was to investigate the metal concentrations in muscle, liver, gill and intestine of seven ray species from Antalya Bay. Because the study is the first for rays in Antalya Bay, this study provides valuable preliminary information about metal contents in different tissues of the examined ray species from the bay and indirectly indicates the environmental contamination of the Antalya Bay.

Acrylamide in Surface and Drinking Water

The presence of acrylamide in water is of concern from both environmental and health points of view. Acrylamide has been included among the substances to be monitored in drinking water according to the European Union Directive 98/83 on potable water. Acrylamide is accepted as a carcinogenic, mutagenic, and reprotoxic material with the potential to cause nervous system damage and weakness of the limbs, exposure to water acrylamide mainly occurs via ingestion or dermal contact. Acrylamide is an unsaturated amide and the main monomer of polyacrylamides that are used as flocculants for clarification of drinking water and the treatment of municipal or industrial effluents; it is also used as a grouting agent in dams, wells, and reservoirs. Because it is highly soluble and mobile in water, acrylamide is readily releasable to potable water supplies. Acrylamide may also be released to aquatic environments from plastic, dye, and pulp mills industries. Absorption of acrylamide by fish or plants from acrylamide-contaminated water is likely to be negligible. Acrylamide in raw water cannot be removed by conventional water treatment processes; treatment with ozone or potassium permanganate may, however, decrease its concentration. Bacterial use of acrylamide as a source of nitrogen and carbon leads to the main acrylamide degradation in water.

Yayladağı Görentaş Göleti (Hatay) Su Kalitesi Parametreleri Üzerine Bir Araştırma / A Study On Water Quality Parameters Of Yayladağı Görentaş Lake (Hatay)

OZET : Hatay’in Yayladagi ilcesinde bulunan Gorentas Goleti’nin su kalitesi ozelliklerini belirlemek amaciyla gerceklestirilen bu calismaya Nisan 2003 tarihinde baslanilmistir. Calisma 12 ay boyunca yurutulmus olup, su ornekleri aylik olarak iki istasyondan toplanmistir. Birinci istasyon goletin kuzey kisminda Goren koyu yakininda, digeri ise goletin guney kisminda Suriye sinirindadir. Su kalitesi parametrelerinden; cozunmus oksijen, pH, sicaklik, tuzluluk, kimyasal oksijen ihtiyaci (KOI), toplam alkalinite, toplam sertlik, amonyak azotu, nitrit, nitrat, fosfat, sulfit, sulfat, klor, potasyum, sodyum ve silis analizleri yapilmistir. Yapilan calisma sonucunda Gorentas Goletinin su kalitesi parametrelerinin aylara ve istasyonlara gore degisimleri belirlenmistir. Anahtar Kelimeler: Su Kalitesi, Gol, Gorentas, Yayladagi, Hatay A Study On Water Quality Parameters Of Yayladagi Gorentas Lake (Hatay) ABSTRACT : This study, purposing to determine water quality characteristics of Gorentas Lake, located in Yayladagi town of Hatay, were begun on April 2003. The study was carried out 12 months and water samples were taken monthly from two stations. First station was on the north side of the lake, nearby Goren village and the other was on south side, Syria board. Water quality parameters of dissolved oxygen, pH, temperature, salinity, chemical oxygen demand (COD), total alkalinity and hardness, ammonia, nitrite, nitrate, phosphate, sulphite, sulphate, chloride, potassium, sodium and silica analyses were done. Change in water quality parameters of Gorentas Lake by months and stations were determined. Keywords: Water Quality, Lake, Gorentas, Yayladagi, Hatay