Yazar "Demirak, Ahmet" için listeleme
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Bioaccumulation and health risk assessment of heavy metals in European eels taken from Lakes Köyceğiz (Turkey) and Võrtsjärv (Estonia)
Demirak, Ahmet; Keskin, Feyyaz; Silm, Maudi; Özdemir, Nedim; Yıldız, Dilek; Bernotas, Priit; Öğlü, Burak (Springer Science and Business Media Deutschland GmbH, 2021)Monitoring heavy metal contaminants in fish is important for the assessment of environmental quality as well as food safety. In this study, European eel samples were collected from Lake Köyceğiz and Lake Võrtsjärv in 2017 ... -
Biosorption of 2,4 dichlorophenol (2,4-DCP) onto Posidonia oceanica (L.) seagrass in a batch system: Equilibrium and kinetic modeling
Demirak, Ahmet; Dalman, Omer; Tilkan, Ezel; Yildiz, Dilek; Yavuz, Evsen; Gokce, Cansu (Elsevier, 2011)Batch biosorption experiments were carried out for the removal of 2-4-dichlorophenol (2,4-DCP) from aqueous solution using raw seagrass Posidonia oceanica (L.) fibers, a Mediterranean marine lignocellulosic biomass. The ... -
Biosorption of 2,4 dichlorophenol Onto Turkish Sweetgum Bark in a Batch System: Equilibrium and Kinetic Study
Yıldız, Dilek; Keskin, Feyyaz; Demirak, Ahmet (Slovensko Kemijsko Drustvo, 2017)In this study, Turkish Sweetgum bark was used as a new biosorbent to investigate the removal of hazardous 2,4 dichlorophenol (2,4-DCP) from aqueous solutions in batch biosoption experiments. The effective usage of Turkish ... -
Chemical characteristics of rain water at an urban site of south western Turkey
Demirak, Ahmet; Balcı, Ahmet; Karaoğlu, Muhammet Hamdi; Tosmur, Berrin (Springer, 2006)In this study, chemical composition of the rain water in Mugla was investigated from February to April 2002. Rain water samples were obtained from Mugla, a small city in south western Turkey. The Yatagan Power Plant is ... -
Chemical fractions of toxic metals and assessment of risks on the environment and health in Mugla topsoils
Demirak, Ahmet; Keskin, Feyyaz (Springer, 2021)In the current study, the chemical fractions of Pb and Cd and total concentrations of these metals in topsoil samples which were collected between 2016 and 2017 in the center of Mugla, which is a small agricultural city ... -
A comparative assessment of the lagoons with water quality indexes and based on GIS: A study on the Aegean Sea and Mediterranean Sea
Özdemir, Nedim; Dokuyucu, Ahmet; Ceviz, Nevcihan Aslınur; Dondu, Mustafa; Demirak, Ahmet; Keskin, Feyyaz (TAYLOR & FRANCIS LTD, 2023)In this study, the current status of water quality in Gulluk Lagoon and Koycegiz-Dalyan Lagoon was examined by comparison using water quality indexes, multivariate statistical analyses and geographical information systems. ... -
Determination of heavy metals (Cd, Pb) and trace elements (Cu, Zn) in sediments and fish of the Southeastern Aegean Sea (Turkey) by atomic absorption spectrometry
Dalman, Ömer; Demirak, Ahmet; Balcı, Ahmet (Elsevier Sci Ltd, 2006)The Bay of Gulluk in Southeastern Aegean Sea (Turkey) is very important by the potential of marine product in the Aegean Sea. There are various polluting elements in Gulluk Bay. The current situation of the bay and impact ... -
Environmental impact of the marine aquaculture in Gulluk Bay, Turkey
Demirak, Ahmet; Balci, Ahmet; Tufekci, Mehmet (Springer, 2006)The effects of marine aquaculture on the environment were evaluated by studying the water quality of Gulluk Bay (Turkey). Marine aquaculture, both extensive and intensive, is one of the most important activities carried ... -
HEAVY METAL CONCENTRATIONS IN FISH (Cyprinus Carpio AND Carassius Carassius), SEDIMENT, AND WATER FOUND IN THE GEYIK DAM LAKE, TURKEY
Ozdemir, Nedim; Yilmaz, Fevzi; Tuna, A. Levent; Demirak, Ahmet (Parlar Scientific Publications (P S P), 2010)This study provides new information on the distribution of heavy metals (Cd, Co, Cu, Fe, Mn, Ni, Pb, and Zn) in fish (tissues of Cyprinus carpio and Carassius carassius), sediment, and water from the Geyik Dam Lake. ... -
Heavy metal levels in two fish species Leuciscus cephalus and Lepomis gibbosus
Yılmaz, Fevzi; Özdemir, Nedim; Demirak, Ahmet; Tuna, A. Levent (Elsevier Sci Ltd, 2007)The concentrations of heavy metals (Cd, Co, Cu, Fe, Mn, Ni, Pb, Zn) were measured in muscle, gill and liver of two fish species (Leuciscus cephalus and Lepomis gibbosus) caught from Saricay, South-West Anatolia. Levels of ... -
Heavy metals in water, sediment and tissues of Leuciscus cephalus from a stream in southwestern Turkey
Demirak, Ahmet; Yilmaz, Fevzi; Tuna, A. Levent; Ozdemir, Nedim (Pergamon-Elsevier Science Ltd, 2006)Concentrations of heavy metals (Cd, Cr, Cu, Ph and Zn) were measured in water, bottom sediment and tissues (muscle and gills) of Leuciscus cephalus from the Dipsiz stream in the Yatagan basin (southwestern Turkey), the ... -
The influence of a coal-fired power plant in Turkey on the chemical composition of rain water in a certain region
Demirak, Ahmet (Springer, 2007)In this study, the chemical composition of the rainwater in Yatagan, which is a region surrounding a coal power plant was investigated from February to April 2002. Rainwater samples were obtained from Yatagan, located ... -
Investigation of heavy metal content in the suspended particulate matter and sediments of inner Gokova Bay and creeks
Demirak, Ahmet; Yilmaz, Hanife Aydin; Keskin, Feyyaz; Sahin, Yalcin; Akpolat, Oguz (Springer, 2012)The Bay of Gokova in Southeastern Aegean Sea (Turkey) is important by the potential of agricultural, municipal, and tourism activities. In addition, there is no industrial plant within the area in the Aegean Sea. Kadin ... -
Investigation of Some Physico-chemical Properties of Köyceğiz, Bafa and Limni Lakes (Muğla-Turkey)
Lakes are among the most important wetland ecosystems. Lakes which are important ecologically are special ecosystems and have many significant roles such as arranging water regime of the region, enabling characteristic ... -
Metals/metalloid in Marine Sediments, Bioaccumulating in Macroalgae and a Mussel
Alkan, Nigar; Alkan, Ali; Demirak, Ahmet; Bahloul, Moez (Taylor & Francis Inc, 2020)The aim of the present work is to broaden our knowledge on the variability of metals and metalloid concentration levels in surface sediments, macroalgae and mollusc. Accordingly, As, Co, Cr, Cu, Mn, Mo, Ni, Pb, and Zn ... -
Quality of water used during cage cultivation of rainbow trout (Oncorhynchus mykiss) in Bereket HES IV Dam Lake (Mugla, Turkey)
Ozdemir, Nedim; Demirak, Ahmet; Keskin, Feyyaz (Springer, 2014)A thorough investigation of the impact of rainbow trout (Oncorhynchus mykiss) cultivation on surface water quality in the area known as Bereket HES IV Dam Lake was conducted. Water samples were collected from October 2009 ... -
Rize' de yağmur suyunun bazı kimyasal özelliklerinin incelenmesi
Balcı, Ahmet; Demirak, Ahmet; Tabak, Funda (2001)Bu çalışmada, Rize'de kış aylarında yağan yağmurun kimyasal özelliklerinin incelenmesi amacıyla üç ayrı istasyonda toplanan yağış örnek-lerinde sülfat, nitrat, nitrit, kalsiyum, magnezyum, toplam sertlik, karbondioksit ve ... -
Ultra-Trace Determination of Arsenic by Platinum-Coated Tungsten Coil Hydride Generation (HG) Atomic Absorption Spectrometry (AAS)
Yıldız, Dilek; Atasoy, Muhammet; Demirak, Ahmet (TAYLOR & FRANCIS INC, 2022)A simple, rapid, and sensitive method for the determination of ultra-trace arsenic (III) is reported based on in situ trapping and revolatilization on a platinum (Pt) coated tungsten (W) coil atom trap. First, the analyte ... -
Wild mushrooms from Ilgaz Mountain National Park (Western Black Sea, Turkey): element concentrations and their health risk assessment
Keskin, Feyyaz; Sarıkürkçü, Cengiz; Demirak, Ahmet; Akata, Ilgaz; Sıhoğlu Tepe, Arzuhan (Springer, 2022)The purpose of this study was to determine Fe, Cd, Cr, Se, P, Cu, Mn, Zn, Al, Ca, Mg, and K contents of some edible (Chlorophyllum rhacodes, Clavariadelphus truncatus, Clitocybe nebularis, Hydnum repandum, Hygrophorus ...
