Wyniki wyszukiwania - BazTech

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Development measures to enhance the ecological safety of ships and reduce operational pollution to the environment

Melnyk Oleksiy, Onyshchenko Svitlana, Onishchenko Oleg

Zeszyty Naukowe. Transport / Politechnika Śląska

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2023

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z. 118

195--206

EN

Reduction of ecological risks of shipping is a challenging task that requires methods of legislative and regulatory control, organizational measures, and technical and technological support. Furthermore, the matter concerns not only the reduction of possible risks but also the level of existing impact on the marine environment because of exhaust gas emissions by ships, discharge of waste and ballast water, as well as control of ecological consequences of accidents. The purpose of this study is to analyse possible sources of environmental impact during ship operation cycles, identify significant risks, review existing potentials to reduce the risk of ship accidents and their environmental consequences, and develop solutions to existing problems. This study offers results, which can serve as the initial basis for the formation of comprehensive measures on the reduction of environmental risks, and consequences of possible accidents for the environment caused by ships and international shipping.

2

Bioaccumulation of Heavy Metals in Mackerel and Red Hybrid Tilapia Collected From

Dabwan Ahmed H. A., Saluddin Ummu Asma’ Hafifah Bt. Mohmad, Isa Nursuhaili Bt. Mohd, Abdullah Abdul Hadi, Mohamed Amri Bin Hj., Ahmad Anuar Bin

Civil and Environmental Engineering Reports

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2022

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Vol. 32, no. 4

270--281

EN

The major goal of this study is to determine the bioaccumulation of heavy metals in the tissues and bones of Red Hybrid Tilapia (Oreochromis niloticus) and Mackerel (Rastrelliger kanagurta) taken from two distinct sites in Terengganu state, Malaysia, namely Kijal and Paka. Zinc (Zn), copper (Cu), nickel (Ni), and lead (Pb)were the metals examined. Soil analysis also was carried out for the same elements. The tissues and bones of the fishes were separated before further analysis was made. Drying process technique was used to determine the moisture content for all samples at 80°C for 24 hours. Water content ranged between 70 & 77%. Triplicate samples were evaluated by using Atomic Absorption Spectrophotometer (AAS) to find out heavy metals concentration. Oven and Teflon beakers were used to fully digest all solid samples at 120oC for 3 hours. Highest readings of Zn, Ni and Pb were found in the fish bone for the samples collected from both mentioned locations. However, different pattern was noticed for Cu where higher values were found in the tissues for the same samples. Values of Pb in the tissues were higher than the acceptable value in edible fish by Food and Agriculture Organization (FAO); 1 ppm and Malaysian Food Act (MFR) & World Health Organization (WHO); 2 ppm, whereas values of Cu, Zn were in the acceptable range set by the same organizations. No values recommended for Ni by MFR. In general heavy metals in the bones and tissues from both locations can be sorted in descending order as follows; Pb>Zn>Cu>Ni. Soil samples collected from both locations showed different pattern where high concentration was found for Zn followed by Pb then Cu and Ni. Moreover analysis for soil samples collected from Paka River showed higher content for all elements compared to Kijal. More investigation is needed to clarify whether this contamination is solely from industry or due to geology of the area.

3

Analiza porównawcza rozmieszczenia pierwiastków chemicznych w osadach dennych Zalewów Szczecińskiego i Wiślanego oraz Zatoki Gdańskiej

Szefer P., Gełdon J.

Przegląd Komunalny

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2006

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nr 9

80-82

PL

Osady denne wykazują zdolność akumulacji pierwiastków proporcjonalnie do ich zawartości w otaczającym ekosystemie morskim, dlatego są wysoce przydatnym materiałem w monitorowaniu wód w celu rozpoznania ich stopnia zanieczyszczenia. Metale ciężkie, zwłaszcza Hg, Cd, Pb oraz niektóre metaloidy (As, Se), wywierają istotny wpływ na stan środowiska morskiego, bowiem za pośrednictwem ogniw morskiego łańcucha pokarmowego (ryby, małże, ostrygi, krewetki itp.) mogą nagromadzać się na wyższych poziomach piramidy troficznej, przenikając tym samym do diety człowieka.

4

Polon w ekosystemie Bałtyku

Skwarzec B., Stepnowski P.

LAB Laboratoria, Aparatura, Badania

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1998

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R. 3, nr 2

9-10