Risk estimation of heavy metals from consumption of silver pomfret and tiger tooth croaker in Hormozagan Province

In the present study, accumulation of manganese, cadmium, zinc, iron and copper in the commercially fish species (silver pomfret and tiger tooth croaker) caught from Bandarabbas coasts at 2010 was measured and the risk of daily intake of them in Hormozagan urban population was estimated. The average concentrations (µ/g dry weight) of manganese, cadmium, zinc, iron, and copper in the muscle tissue of silver pomfret were 1.248, 0.217, 14.444, 2.397 and 3.300, respectively, while the concentration of them in tiger tooth croaker were 1.009, 0.403, 12.564, 4.467 and 2.366, respectively. According to fish consumption rate, urban populations of the province were divided into four groups; low, medium, high and very high. The target hazard quotient (THQ) in each group calculated separately. The THQ of all groups were much lower than 1 in the two fish. The results showed that urban populations of the province have not any risk due to accumulation of the studied heavy metals

HERA - Environmental Risk Assessment of a contaminated estuarine environment: a case study

Sado River estuary is located in the west coast of Portugal. Previous environmental studies identified industrial contamination, non-point anthropogenic sources and contamination coming from the river, all promoting accumulation of polluted sediments with known impacts on the ecological system. Surrounding human populations have intense economic fishery activities. Together with agriculture, estuary fishing products are available to local residents. Food usage previously characterized through ethnographic studies suggests exposure to estuarine products, farming products, and water in daily activities, as potential routes of contamination. It is well established that long term exposure to heavy metals are associated with renal and neurological diseases, most heavy metals are classified as carcinogenic and teratogenic.Instituição Financiadora: FCT; Instituições participantes: IMAR -Instituto do Mar (coord.)e PRÓ-INSA, Associação para a Promoção da Investigação em Saúde, Instituto Nacional de Saúde Doutor Ricardo Jorg

Heavy metal and Pb isotopic compositions of aquatic organisms in the Pearl River Estuary, South China

Author name used in this publication: C. C. M. IpAuthor name used in this publication: X. D. LiAuthor name used in this publication: G. ZhangAuthor name used in this publication: C. S. C. WongAuthor name used in this publication: W. L. Zhang2005-2006 > Academic research: refereed > Publication in refereed journalAccepted ManuscriptPublishe

Zn, Pb, Cr and Cd concentrations in fish, water and sediment from the Azuabie Creek, Port Harcourt

Gills, intestine and muscle samples of O niloticus, water and surface sediments of Azuabie Creek and a central station were collected and analysed for Zn, Pb, Cr and Cd using AAS model 210VGP Buck Scientific USA. Heavy metal concentrations in fish muscle show high concentration especially Pb which is far above the 0.5 mg/kg permissible limit of FAO. The bioaccumulation factor, estimated daily intake and hazard quotient were estimated. An hazard index of 7.56 was recorded in Azuabie Creek. The concentrations of metals in the fish organs assessed varied significantly (P < 0.05).Keywords: Heavy metals, Bioaccumulation factor, EDI, Oreochromis niloticus, Azuabie cree

Determination of the Concentration of Heavy Metals and Their Assessment of Related Potential Health Risk for Dry Black Teas in Kashan, Iran

Tea is one of the most popular beverages being widely used by all families, especially among Iranians. Thus, the presence of any contaminants in tea can be dangerous for the health of consumers. The present study aimed to evaluate the concentration of heavy metals and their potential health risk in the dry black teas available in Kashan shops. This cross-sectional study was carried out on 31 brands of dry black tea purchased randomly from shops in Kashan, Iran in 2019. After the preparation of samples, the concentration of some heavy metals was determined by ICP-OES (Inductively Coupled Plasma/Optical Emission Spectrophotometer)based on the procedure described in the Standard Method. The evaluation carcinogenic risk was performed using related formula. Based on results of this study, the mean concentration of Fe, Zn, Cu, Ni, Cr, Pb, As and Cd was 83.42, 21.47, 19.46, 4.04, 0.72, 0.66, 0.4 and 0.04 Mgkg-1 of dry black tea, respectively. According to their associated potential health risk assessment, THQ of some heavy metals including As, Cu, Cr, Ni, Pb, Fe, Zn and Cd was 0.064, 0.023, 0.011, 9.76×10-3, 9.11×10-3, 5.76×10-3, 3.46×10-3 and 1.88×10-3 Mgkg-1day-1 and HI was less than one (0.129). Regarding the findings, it can be concluded that, the concentration of Cu, Ni and Cr in all samples of dry black tea was compatible with the Iranian and WHO standard level, while for Cd, Pb, As, Zn and Fe in some samples were more than the Iranian and WHO standard level. In addition, risk assessment analysis indicated that the consumption of the studied black tea had no carcinogenic potential risk for consumers

DETERMINAYION OF SOME HEAVY METAL ELEMENTS IN DUSKY SPINEFOOT, Siganus luridus, FROM THE SYRIAN COAST (EASTERN MEDITERRANEAN) AND ITS RELATIVE RISK FOR HUMAN CONSUMPTION

Heavy metal pollution is a serious problem for the environment due to its toxicity, persistency, bioaccumulation. In this study, the concentration of four heavy metals (Zn, Cu, Pb, Cd) in muscle of Siganus luridus from the Syrian marine waters (Eastern Mediterranean) were assessed, to evaluate the potential role of domestic and industrial effluents released without treatment on the quality of the marine environment with consequences to fish resources. Samples were collected from six different areas during two consecutive years, from March 2019 to February 2021. Determination of these metals was carried out using atomic absorption spectroscopy, according to the techniques of electrothermal and flame ablation. Health risk was assessed using estimated daily intake and target hazard quotient. Heavy metal levels were higher in the site relatively close to industrial pollution sources, tourism and agricultural activities. The results showed high concentrations of zinc in the muscle compared to the other metals studied, it ranged between (3.5-6.1 μg/g wet weight), followed by copper with average ranging between (0.4-0.5μg/g wet weight), then lead with concentration (0.016-0.025 μg/g wet weight), while cadmium was the least concentrated (0.005-0.008 μg/g wet weight). All of these concentrations were within the limits allowed by the World Food and Agriculture Organization. The averages of EDI and THQ values for children were higher than adults. However, both of them were below the harmful and hazardous levels, indicating that consumption of S. luridus in the Syrian coast will not lead to health risks from the four heavy metals studied

Türkiye'nin karadeniz kıyılarında yakalanan sarda sarda'da (bloch, 1793) ağır metal konsantrasyonları ve sağlık riski değerlendirmesi

In this study, it was aimed to determine heavy metal levels in muscle tissues of Atlantic bonito samples caught in the Eastern Black Sea Region and to determine their potential to pose a risk to human health. The concentrations of Fe, Zn, Cu, Pb, Mn, and Al have been measured in the edible muscle of Atlantic bonito (Sarda sarda Bloch, 1793) from the Trabzon and Rize coasts of the southern Black Sea from September 2020 to December 2020. Cd, Cr, Co, and Ni were not detected in the edible part of S. sarda in both coastal areas. These concentrations are lower than the maximum permissible values in European and Turkish regulations. The average weekly intake of heavy metals per body weight value not exceeded the Provisional Tolerable Weekly Intake (PTWI) established. Therefore, it may be concluded that these ten metals should not pose any health threat to the consumers resulting from the consumption of S. sarda.Bu çalışmada, Doğu Karadeniz Bölgesinde yakalanan palamut örneklerinin kas dokularındaki ağır metal seviyelerinin belirlenmesi ve insan sağlığı açısından risk oluşturma potansiyellerinin belirlenmesi amaçlanmıştır. Karadeniz'in Trabzon ve Rize kıyılarında avlanan palamutun (Sarda sarda Bloch, 1793) yenilebilir kaslarında Fe, Zn, Cu, Pb, Mn ve Al konsantrasyonları ölçülmüştür. Eylül 2020'den Aralık 2020'ye kadar deniz. Her iki kıyı bölgesinde de S. sarda'nın yenilebilir kısmında Cd, Cr, Co ve Ni tespit edilmedi. Bu konsantrasyonlar, Avrupa ve Türkiye yönetmeliklerinde izin verilen maksimum değerlerden daha düşüktür. Vücut ağırlığı değerleri başına haftalık ortalama ağır metal alımı, belirlenen Geçici Tolere Edilebilir Haftalık Alım (PTWI) değerini aşmadı. Bu nedenle, S. sarda tüketiminden kaynaklanan bu 6 metalin tüketiciler için herhangi bir sağlık tehdidi oluşturmaması gerektiği sonucuna varılabilir

Heavy metal concentration and potential health risk assessment for the European eel (Anguilla anguilla, Linnaeus 1758) from the Gediz Delta (Eastern Aegean, Türkiye)

The present paper is the first document on heavy metal levels in the European eel (Anguilla anguilla) collected from the Gediz Delta in the Eastern Aegean (Türkiye). In this study, concentrations of Cd, Cu, Zn and Pb were determined in the liver, gills, and muscle tissues of A. anguilla eels. Sixty dead eels were obtained between June 2015 and January 2016, and their total size and weight were measured. Heavy metal accumulation levels in edible muscle tissue of the eels were compared with national and international standards, and Estimated Weekly Intake (EWI), Target Hazard Quotient (THQ), and Total Target Hazard Quotient (Σ THQ) were calculated. It was determined that metal concentration levels in A. anguilla follow the sequence of Zn > Cu > Pb > Cd. Zn has the highest concentration in all sampling periods and in all tissue types. It was found that Σ THQ was below 1 and amounted to 0.41. This result shows that there is no carcinogenic risk associated with the consumption of A. anguilla in adults.The present paper is the first document on heavy metal levels in the European eel (Anguilla anguilla) collected from the Gediz Delta in the Eastern Aegean (Türkiye). In this study, concentrations of Cd, Cu, Zn and Pb were determined in the liver, gills, and muscle tissues of A. anguilla eels. Sixty dead eels were obtained between June 2015 and January 2016, and their total size and weight were measured. Heavy metal accumulation levels in edible muscle tissue of the eels were compared with national and international standards, and Estimated Weekly Intake (EWI), Target Hazard Quotient (THQ), and Total Target Hazard Quotient (Σ THQ) were calculated. It was determined that metal concentration levels in A. anguilla follow the sequence of Zn > Cu > Pb > Cd. Zn has the highest concentration in all sampling periods and in all tissue types. It was found that Σ THQ was below 1 and amounted to 0.41. This result shows that there is no carcinogenic risk associated with the consumption of A. anguilla in adults