scholarly journals Environmental study of natural radioactivity regime of the Ikaria island and the radiological impact

2020 ◽  
Vol 6 ◽  
pp. 322
Author(s):  
G. Trabidou ◽  
H. Florou ◽  
A. Angelopoulos ◽  
L. Sakelliou ◽  
I. Katsikis
Keyword(s):  
Natural Radioactivity ◽  
Sea Water ◽  
Natural Radionuclides ◽  
Sediment Surface ◽  
Environmental Study ◽  
The Public ◽  
Soil Sediment ◽  
Decay Series ◽  
Preliminary Study ◽  
Marine Flora

This is a preliminary study on the natural radioactivity of the spas in the Icaria island and the consequent impact to the public health. In order to carry out this research : a) Car-borne radiometry has been applied in the areas around the spas as well as in some reference areas in the island b) The activity concentrations of the natural radionuclides of the 238U-226Ra and 232Th decay series, as well as 40K, in spa water, soil, sediment, surface sea water and marine flora samples in the areas of the spas were measured, from the results derived one notes that elevated concentrations of the environmental abiotic materials are presented, which are reflected to the concentrations observed in marine flora. Consequently, higher population doses in comparison with other Greek regions are resulted.

scholarly journals Natural Radioactivity in Various Water Tasters Using y-Ray Measurement

2021 ◽  
pp. 26-30
Author(s):  
I. Hossain ◽  
N. M. Yussuf ◽  
M. A. Saeed ◽  
M. O. Alzanbaqi ◽  
H. Wagiran
Keyword(s):  
Natural Radioactivity ◽  
Water Samples ◽  
Mineral Water ◽  
Gamma Ray ◽  
Natural Radionuclides ◽  
Gamma Ray Spectrometry ◽  
Ecological Knowledge ◽  
The Public ◽  
Activity Concentrations ◽  
Effective Doses

This paper has explained the contamination of natural radionuclides in various water testers using gamma ray measurement which is very significant as part of health scrutiny programs to progress the ecological knowledge. Natural radioactivity was determined in five groups of water samples (rain, mine, tap, drinking and mineral) from different places at Johor, Malaysia by means of gamma-ray spectrometry tool. The annual cumulative effective doses were estimated 6.05 mSv /yr for rain, 9.49 mSv/ yr for mine, 6.39 mSv /yr for tap, 5.67 mSv /yr for drinking, and 6.01 mSv/yr for mineral water. Among the five samples, mine water gave the highest value in annual effective dose measurement. The measured data are compared with the reported value. The activity concentrations of five water samples provided that bottled drinking water was the lowest than other water samples. This research is useful to provide some information to the public about the amount of radionuclide content uranium, thorium and potassium that present in water.

scholarly journals Gamma spectroscopy studies of the underwater hydrothermal vent field of the Methana Peninsula

2019 ◽  
Vol 26 ◽  
pp. 183
Author(s):  
V. Papakosta ◽  
T. J. Mertzimekis ◽  
M. Triantafyllou
Keyword(s):  
Hydrothermal Vent ◽  
Gamma Ray ◽  
Gamma Spectroscopy ◽  
Natural Radionuclides ◽  
Naturally Occurring ◽  
Activity Concentrations ◽  
Decay Series ◽  
Preliminary Study ◽  
Spectroscopy Studies ◽  
The Impact

A preliminary study of natural radioactivity was conducted on the thermal spas in Methana Peninsula. To carry out this research, a collection of 17 water samples were taken from thermal springs around and underwater of the volcanogenic Peninsula at depths ranging 0–5 m. The Methana peninsula belongs to the Hellenic Volcanic Arc and is characterized by hydrothermal vent activity. A NaI(Tl) scintillator (AMESOS) was used to carry out gamma–ray counting of the samples to deduce the activity concentrations of the natural radionuclides of the 238U and 232Th decay series, as well as 40K in spa waters. Results are expected to provide information on the geological setting of the Methana peninsula. The impact of naturally occurring radioisotopes to human health has also been assessed in terms of the radiation dose risk corresponding to the measured activities.

The Combination Process between Disc-Mill and Distillation Evaporation in Producing Salt Diversification Products

2017 ◽  
Vol 862 ◽  
pp. 174-181
Author(s):  
Intan Baroroh ◽  
Bagiyo Suwasono ◽  
Ali Munazid
Keyword(s):  
Mineral Water ◽  
Solar Power ◽  
Sea Water ◽  
Coastal Communities ◽  
Combination Process ◽  
The Public ◽  
Salt Production ◽  
Liquid Salt ◽  
Disk Mill

ABSTRACT.Blue Economy concept began with the farming of Artemia salt. The industry of farmer’s salt was one of the pillars that supported the economy of coastal communities. At present, the perspectives of the public on an industrial salt production is less profitable and conducted by unskilled laborers. Nowadays, the farmer still used evaporation total method of sea water by solar power, where NaClwas ≤ 90% and residual brine. It is necessary to improve the salt production through combination between disk-mill and distillation evaporation technology to produce salt diversification product. The result of the combination process were refined salt with NaClthat was ≥ 90%, liquid salt with NaClthat was ± 60% and mineral water.

scholarly journals Preliminary Study on Abundance of Microplastic in Sediments and Water Samples Along the Coast of Pakistan (Sindh and Balochistan)-Northern Arabian Sea

2021 ◽  
Vol 22 (Special Issue) ◽  
Author(s):  
Quratulan Ahmed ◽  
Qadeer Mohammad Ali ◽  
Levent Bat ◽  
Aysah Oztekin ◽  
Sehrish Memon ◽  
...  
Keyword(s):  
Arabian Sea ◽  
Sea Water ◽  
Plastic Material ◽  
Plastic Pollution ◽  
Sediment Samples ◽  
Water And Sediment ◽  
Northern Arabian Sea ◽  
Pollution Problem ◽  
High Pollution ◽  
Preliminary Study

Plastic material dominates our life and accordingly, it dominates the environment as a pollutant. Pakistan coasts are facing with plastic pollution problem like the rest of the world. The number and types of microplastics found in sea water and sediment samples from 25 locations along the Arabian Sea coast of Pakistan were explored in this study. The results of the present study show that the region is under a high pollution from microplastics. Microplastic abundance in seawater was found as mean 582.12±246.14 particle. L-1 and in sediment samples was mean 987.40±617.06 particle.kg-1 dry sediment. Microplastic concentration was maximum in Manora both seawater and sediment samples. Fibers were major contribution to total microplastics, up to 99% of all samples both seawater and sediment samples.

scholarly journals VZTAH MEZI PŘIROZENOU RADIOAKTIVITOU HORNIN A PŮD NA NICH VYTVOŘENÝCH – ZÁKLADNÍ PROBLÉM INTERPRETACE DAT ZÍSKANÝCH LETECKOU A TERÉNNÍ GAMASPEKTROMETRIÍ

2016 ◽  
Vol 22 (1-2) ◽  
Author(s):  
Jiří Zimák
Keyword(s):  
Natural Radioactivity ◽  
Gamma Ray ◽  
Natural Radionuclides ◽  
Size Fraction ◽  
Mineralogical Composition ◽  
Gamma Ray Spectrometry ◽  
Spectrometric Analysis ◽  
Radiation Dose Rate ◽  
Parent Rocks ◽  
Mass Activity

The objective of this study was to assess the amount of natural radionuclides in fresh parent rocks and their effect on natural radioactivity of soils developed from them. Forty-five fresh rocks consisting mainly of granitoids, syenitoids, acid to basic metavolcanites, mica schists, gneisses, quartzites, serpentinites, sandstones, graywackes, and limestones and their corresponding overlying soils were sampled for laboratory gamma-ray spectrometric analysis. Contents of potassium, uranium and thorium were converted to mass activity of 226Ra equivalent (am) and terrestrial gamma radiation dose rate (D). Data are tabled and discussed. The highest am values occured in syenitoids (386–441 Bq·kg-1) followed by granitoids, mica schists, greywackes and gneisses, whereas the lowest am values were found in quartzose sandstones (15–36 Bq·kg-1) followed by limestones (less than 15 Bq·kg-1) and serpentinites (less than 6 Bq·kg-1). The natural radioactivity of soils is usually slightly lower than that of parent rocks due to the lower content of potassium, uranium and thorium in soils. This is typical for granitoids, syenitoids and rocks of similar mineralogical composition. In soils developed on granitoids and syenitoids were found increased concentrations of all three elements in the grain size fraction below 0.063 mm. Soils developed on rocks with low natural radioactivity (such as limestones and serpentinites) tend to have significantly higher natural radioactivity than their parent rocks. This may complicate the interpretation of data obtained by airborne gamma-ray spectrometry.

scholarly journals EKSEKUSI NAFKAH PERCERAIAN DI PENGADILAN AGAMA KOTA MALANG

Ulumuddin ◽  
2018 ◽  
Vol 11 (1) ◽  
pp. 116
Author(s):  
Rendra Widyakso
Keyword(s):  
Rule Of Law ◽  
Islamic Law ◽  
Public Order ◽  
Scholarly Journals ◽  
Financial Responsibility ◽  
The Public ◽  
Legal Studies ◽  
Preliminary Study ◽  
The Law

This article aims to answer to important questions in legal studies that how to implement the legal execution of earning the expenses caused by divorce based on Indonesian law? And, how do the perspective of Islamic legal schools deal with the execution? There are numbers of scholarly journals studying this specific issue. However, the preliminary study that specifically focuses on the Legal Verdict of the Religious Court of Malang No. 0957/Pdt.G/2014/PA.MLG is offered by this article. It finds that legally, the judge has authority to order the ex-husband to pay the expences of the divorce compensation (mut’ah), financial responsibility due to divorce (iddah) and financial claim (madiyah) and financial childcare (hadhanah) before the divorce pledge is pronounced. If the expences cannot be paid, the ex-wife has right to purpose the legal execution to the court. Due to the purpose the chief of justice is responsible for and has authority to remind the ex-husband (aanmaning) and doing the legal execution if he disrespectly avoided the court’s order. The concept of legal expenses due to divorce is ruled by the fiqh of Islamic legal schools, in spite of the fact that the details of execution remain no any explanation. This article argues that the execution has been done referring to the law. It purposes to fulfil justice, expediency and rule of law. Furthermore, these purposes are the beginning step in order to achieve the public order (mashlahah) and the higher objective of Islamic law (maqashid al-syari’ah).

NATURAL RADIATION EXPOSURE TO THE PUBLIC IN MINING AND ORE BEARING REGIONS OF CAMEROON

2019 ◽  
Vol 184 (3-4) ◽  
pp. 391-396 ◽  
Author(s):  
Saïdou ◽  
Shinji Tokonami ◽  
Masahiro Hosoda ◽  
Ndjana Nkoulou II Joseph Emmanuel ◽  
Naofumi Akata ◽  
...  
Keyword(s):  
Radiation Exposure ◽  
Indoor Radon ◽  
Natural Radionuclides ◽  
Survey Method ◽  
Natural Radiation ◽  
Joint Research ◽  
The Public ◽  
Activity Concentrations ◽  
Joint Research Project ◽  
Thoron Progeny

Abstract Within the framework of a joint research project on natural radiation exposure and its health effects in Cameroon from 2014 to 2017, the Institute of Geological and Mining Research and the Hirosaki University worked together to carry out natural radiation survey in mining and ore bearing regions of Cameroon. Air kerma rates were measured using car-borne survey method. In-situ gamma spectrometry was used to determine activity concentrations of 238U, 232Th and 40K in soil. A total of 450 RADUET detectors and 350 thoron progeny monitors were deployed in dwellings of the study areas for 2–3 months, collected and analysed. Although natural radioactivity level seems to be normal in most of the surveyed areas, there are many points where activity concentrations of natural radionuclides are largely above the world average values. Indoor radon, thoron and thoron progeny results show the importance to put in place the national radon plan in Cameroon. It was also pointed out that thoron cannot be neglected when assessing inhalation dose.

scholarly journals Characterization of the Siderurgy Slags as the Presence of Natural Radionuclides

Proceedings ◽  
2018 ◽  
Vol 2 (20) ◽  
pp. 1296
Author(s):  
Diogo T. Moreira ◽  
Arno H. Oliveira ◽  
Adriana S. M. Batista
Keyword(s):  
Construction Material ◽  
Natural Radionuclides ◽  
Steel Slag ◽  
Building Industry ◽  
High Quality ◽  
Mineral Aggregate ◽  
Steelmaking Slags ◽  
Preliminary Study ◽  
Metallurgical Processes

Present day steelmaking slags are being successfully used as a high quality mineral aggregate for the building industry. With this, it is of vital importance to be familiar with the technical significance of the secondary application of steel slag, because some steel slag might contain increased concentration of substances harmful to human health. In terms of steel slag impact on the environment, radionuclides are the least researched of all pollutants emitted from the metallurgical processes. This work presents the preliminary study about the presence of the uranium in siderurgy slag aggregates for the purpose of its use in the production of construction material. The results showed that this slag is free of uranium which brings greater security in its use as building material.

The Sea-Water Well System at the Fisheries Laboratory, Lowestoft and the Methods in Use for Keeping Marine Fish

1980 ◽  
Vol 60 (1) ◽  
pp. 215-225 ◽  
Author(s):  
P. Scholes
Keyword(s):  
Marine Fish ◽  
Open System ◽  
Ad Hoc ◽  
Sea Water ◽  
International Council ◽  
The Public ◽  
Practical Operation ◽  
Water Well ◽  
Pros And Cons ◽  
Methods Of Operation

Facilities for keeping marine fish for experimental purposes or for display to the public are usually run on either an open system with direct supplies of water from the sea, as in the Bergen Aquarium (Rollefsen, 1962), or on a mainly closed system in which the sea water is continually recirculated (Saeki, 1958). The pros and cons of each system are well known and have been discussed in the published papers of the 1960 1st International Congress of Aquarology held in Monaco (Comité Scientifique et Technique du Congrés International d'Aquariologie, 1962–63) and in the report of the ad hoc meeting in 1975 on design and practical operation of research aquarium systems held at Texel, The Netherlands (International Council for the Exploration of the Sea, 1975). A combination of the two types of system is often used in research institutions and series of papers on sea-water aquarium designs and methods of operation have been collected by Clark & Clark (1964).

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