A MSFD complementary approach for the assessment of pressures, knowledge and data gaps in Southern European Seas : the PERSEUS experience

PERSEUS project aims to identify the most relevant pressures exerted on the ecosystems of the Southern European Seas (SES), highlighting knowledge and data gaps that endanger the achievement of SES Good Environmental Status (GES) as mandated by the Marine Strategy Framework Directive (MSFD). A complementary approach has been adopted, by a meta-analysis of existing literature on pressure/impact/knowledge gaps summarized in tables related to the MSFD descriptors, discriminating open waters from coastal areas. A comparative assessment of the Initial Assessments (IAs) for five SES countries has been also independently performed. The comparison between meta-analysis results and IAs shows similarities for coastal areas only. Major knowledge gaps have been detected for the biodiversity, marine food web, marine litter and underwater noise descriptors. The meta-analysis also allowed the identification of additional research themes targeting research topics that are requested to the achievement of GES. 2015 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license.peer-reviewe

Investigation of anionic detergent and phosphate pollution in the coastal surface water of Gokceada

This study was conducted to determine the anionic detergent and phosphate pollution in the coastal area of Gokceada Island between December 2016 and November 2017. According to the results, the anionic detergent concentrations 0.020-0.051 mg/L and phosphate concentrations 0.008-0.451 mg/L were found between the values. The average concentrations of anionic detergent and phosphate in water samples collected from the island were evaluated according to Water Pollution and Control Regulation in water samples from Gokceada Island. The island waters were determined as I. class (uncontaminated water) in terms of anionic detergent parameter and II. class (less contaminated water) in terms of phosphate parameter

Assessment of polycyclic aromatic hydrocarbons (PAHs) in mussels (Mytilus galloprovincialis) of Prince Islands, Marmara Sea

In this study, PAH analyses have been conducted on indigenous mussels. Mussel samples (Mytilus galloprovincialis) have been collected from seven stations of Prince Islands during September 2015. Concentrations of total determined PAHs (sum of 16 compounds) ranged between 664 and 9083 ng g(-1). The origin of PAHs has been found to be pyrolytic according to the PHE/ANT and FA/PYR ratios in Buyukada. For other islands, PAH origins have been observed as pyrolytic and petrogenic together according to the PHE/ANT, FA/PYR and BaA/CHR ratios. (C) 2016 Elsevier Ltd. All rights reserved

Comparison of TPH Contamination in Coastal Surface of North Aegean and Marmara Seas: Prince Islands and Gokceada

In this study. throughout 2017, TPH values were determined in surface water samples taken seasonally from 15 different stations around Gokceada and monthly from the 4 resided islands (from one spot for each) of Princes' Islands. The water samples were extracted with dichloromethane and the extract was passed through the cleaning apparatus and absorbances were measured using the spectrophotometer. Concentrations were calculated using the standard curve. TPH levels ranged from 0.24 mu g L-1 to 8.94 mu g L-1 in Gokceada. The highest TPH levels was determined at. Kalekoy station located near to the port during the summer when the access to the island became more frequent.. The values in the Prince Islands ranged between 0.8 mu g L-1 and 8 mu g L-1. The highest value was also found in the summer period at Buyukada station where the highest population and most frequent transportation occurred in the island. With these findings. provided data were compared in two regions. It was found that, although the Princes' Islands sustained high values as a result of intensive polluting activities, Gokceada had a potential for high pollution due to its location (close to the exit of Turkish Straits System) and increasing preferability

Seasonal changes of LAS, phosphate, and chlorophyll-a concentrtions in coastal surface water of the Prince Islands, Marmara Sea

One-year monitoring study was performed on alkyl benzene sulphonate (LAS), phosphate, and chlorophyll-a concentrations in the Prince Islands between January and December of 2017. Surface water samples were collected monthly at one station at each island. The ranges of values of LAS, phosphate, and chlorophyll-a were found as 18.05-72.98 mu g/L, 18.32-31.18 mg/L, and 0.31-6.35 mu g/L, respectively, during all sampling periods throughout the islands. There were no significant differences in the concentrations of anionic detergent, phosphate, and chlorophyll-a within a year (p > 0.05), but a significant difference was observed between the stations (p < 0.05)

Kuzey Ege ve Marmara Denizleri Kıyısal Yüzey Suyunda TPH Kontaminasyonu Açısından Karşılaştırma: Prens Adaları ve Gökçeada

In this study. throughout 2017, TPH values were determined in surface water samples taken seasonally from 15 different stations around Gokceada and monthly from the 4 resided islands (from one spot for each) of Princes' Islands. The water samples were extracted with dichloromethane and the extract was passed through the cleaning apparatus and absorbances were measured using the spectrophotometer. Concentrations were calculated using the standard curve. TPH levels ranged from 0.24 mu g L-1 to 8.94 mu g L-1 in Gokceada. The highest TPH levels was determined at. Kalekoy station located near to the port during the summer when the access to the island became more frequent.. The values in the Prince Islands ranged between 0.8 mu g L-1 and 8 mu g L-1. The highest value was also found in the summer period at Buyukada station where the highest population and most frequent transportation occurred in the island. With these findings. provided data were compared in two regions. It was found that, although the Princes' Islands sustained high values as a result of intensive polluting activities, Gokceada had a potential for high pollution due to its location (close to the exit of Turkish Straits System) and increasing preferability

Potential effects of polycyclic aromatic hydrocarbons (PAHs) in marine foods on human health: a critical review

Marine pollution particularly oil pollution is a major threat to human and environmental health. Commercial species being suitable for consumption of marine environment such as fish, mollusks, invertebrates, etc. are demanded by consumers all around the world. Polycyclic aromatic hydrocarbons (PAHs) are one of the most widespread organic environmental pollutants that pose a potential risk to human health via marine biota. Toxic, carcinogenic and mutagenic properties of PAHs are studied in several researches. This paper reviews thoroughly the sources, potential risks and harmful health effects of PAHs in marine food according to the findings of published research studies

INVESTIGATION OF THE REMOVAL OF CRYSTAL VIOLET DYE BY ELECTROCOAGULATION METHOD

In this study, the removal of crystal violet from water by using the electrocoagulation method was investigated. The effects of operational parameters such as time of electrolysis, initial pH of solution, solution conductivity, current density and the initial dye concentration were examined during color removal. The results showed that color removal efficiency increased with time. Initial pH of dye solution had no considerable effect on color removal efficiency. The color removal efficiency reached 99% for all pH values. The highest color removal efficiency was seen at pH 6 with 10 min electrolysis time. The efficiency increased with the increase in solution conductivity and applied current density. As the current density increased from 5.8 to 17.36 mA/cm(2), the color removal efficiency rose from 55 to 95%. A decrease in the color removal efficiency was observed when initial dye concentration increased. At 30 min of electrolysis time, color removal efficiencies were 95 and 55% for initial dye concentration of 90 and 570 mg/L. The results of this study showed that electrocoagulation using aluminum electrodes could be applied for the treatment of wastewater containing crystal violet dye

The Effects of Sulphate, Nitrate, and Humic Substances on Mn(II) Oxidation with Atmospheric Oxygen in Drinking Water

Manganese removal is an important problem. Mn cannot be removed by membrane filtration without being oxidized to manganese dioxide, and oxidation is one of the conventional methods for removing manganese from water. The aim of this study is to find out the effects of SO42- (sulphate), NO3- (nitrate), and humic substances on oxidation of Mn(II) with atmospheric oxygen in drinking water when drinking water obtained from ground water and surface water includes many humic substances, SO42- and NO3-, due to soil. In this paper we studied the oxidation in four-stage batch systems. First, Mn(II) concentrations used different initial concentrations, pH values and filter papers having different pore diameters. Then we investigated the effects of SO42-, NO3-, and humic acids following determination of optimum initial concentration, pH and filter paper. According to statistical analysis, there are significant effects of additional substances on Mn(II) oxidation with atmospheric oxygen (p<0.001)

Source Determination and Seasonal Distribution of Polycyclic Aromatic Hydrocarbons (PAHs) in Urban Soil of the Megacity Istanbul

A total of 62 topsoil samples (0-10 cm) were gathered from Istanbul's urban town and investigated for 8 polycyclic aromatic hydrocarbons (PAHs). The main aim of the study was to assess the origins of PAHs using diagnostic ratios of selected pairs of PAH congeners in soil of Istanbul. The range of total of 8 PAHs (sigma(8)PAH) concentrations was found as 0.001-5.941 mu g g(-1). Generally higher concentrations were determined at locations being crowded towns and close to busy traffic. Most stations have both pyrolytic and petrogenic origins of PAHs. This study is the first research on the origin of PAHs in Istanbul urban soils and will be database for further studies