Natural radionuclide concentrations in two phosphate ores of east Algeria

Lakehal, C H; Ramdhane, M.; Boucenna, A.

doi:10.1016/j.jenvrad.2010.02.008

Cited by 28 publications

(8 citation statements)

References 4 publications

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“…The activity concentrations of the radionuclides in the measured samples (A s ) were computed using the following equation (Lakehal et al, 2010),…”

Section: Activity Concentrationsmentioning

confidence: 99%

“…Currently, there is not much information on radioactivity levels in the agricultural environment in Algeria, there is only a limited number of studies which evaluate soil radioactivity, including the Mila region. The basic studies of radioactivity in the agricultural environment are: a measure of natural radionuclide concentrations in two phosphate ores of east Algeria (Lakehal, Ramdhane, & Boucenna, 2010) and evaluate of radioactivity level of virgin and fertilized soils which were collected from outlying Setif region (Algeria) and of phosphate fertilizers used in these areas (Boukhenfouf & boucenna, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Natural radioelement concentrations in fertilizers and the soil of the Mila region of Algeria

Bramki

Ramdhane

Benrachi

2018

Journal of Radiation Research and Applied Sciences

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The addition of inorganic fertilizers to treat crop soil and increase its production has become a necessity and a tool used around the world. These fertilizers contain different quantities of uranium and thorium. Therefore, tons of radionuclides from natural radioactive series 238 U, 235 U and 232 Th are dispersed in the environment due to a high use of fertilizer in agriculture. In this work, the radioactivity levels were determined in two fertilizers and in fertilized and unfertilized soil samples collected at various depths from the Algerian agricultural region of El-Athmania Mila, using high resolution gamma ray spectroscopy. The activity concentrations of 226 Ra, 232 Th and 40 K for fertilized and unfertilized soil samples were found unchanged as a function of depth and ranged from 23.72

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“…The activity concentrations of the radionuclides in the measured samples (A s ) were computed using the following equation (Lakehal et al, 2010),…”

Section: Activity Concentrationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Natural radioelement concentrations in fertilizers and the soil of the Mila region of Algeria

Bramki

Ramdhane

Benrachi

2018

Journal of Radiation Research and Applied Sciences

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“…These indices must be less than unity in order to keep the radiation hazard insignificant (Lakehal et al, 2010;Baykara et al, 2010).…”

Section: Hin = Au/185 +Ath/259 + Ak/4810 (4)mentioning

confidence: 99%

Environmental radioactivity of pegmatites associating younger granite of Ras Baroud area, Central Eastern Desert, Egypt.

2020

The Egyptian Journal of Environmental Change

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Ras Baroud pluton is one of the well exposed granitic batholiths in the Central Eastern Desert of Egypt. The granites occure as isolated plutons of high relief circular and semicircular outlines. They are cut by zoned pegmatites and dikes of different types. The pegmatites are found as lenticular pockets and sheet-like bodies along the southern periphery of Ras Baroud pluton. The zonal sequence of the pegmatites is formed of an outer blocky feldspar zone. The intermediate mica zone (muscovite and/or biotite) and an inner zone of massive quartz might present in some pockets and absent in others. In some pegmatite pockets, the intermediate zone of mica occurs with some distinct dark alteration parts that record the highest radioactivity levels. The geochemical studies revealed that these pegmatites are attributed to low temperature late differentiated magmatic fluids enriched in volatiles.Field radiometric survey was used to evaluate the suitability of mineral resources at the different pegmatite zones to industrial use. The environmental radioactive parameters showed that the radioactivity of all four zones of the pegmatites is higher than the safety limit which indicate hazardous effects on human lives if used as indore building and/or ornamental stones. Also, the uranium migration rates and directions showed that uranium migrates from the radioactive altered zone which has the higher uranium content towards the other three pegmatite zones (outer, intermediate and inner zones).From a paragenetic point of view, zones in pegmatite are developed from the wall inward within a restricted pegmatitic stage. In the early stage, zoned pegmatites of simple mineralogy are produced. In the later stage, residual fluids rich in soda, silica, alumina and significant quantities of Nb, Ta, U, Th and F travel along fractures, react with the previously formed pegmatitic minerals forming new minerals of replacement origin.The zoned pegmatites host U-minerals (betafite and kasolite) as well as Nb-Ta mineral (columbite) as invisible disseminations in the intermediate alteration zone, that confines their formation in a temperature range between 300 and 500 o C. The hydrothermal activity and the alteration processes are responsible for the deposition of the uranium minerals.

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“…These indices must be less than unity in order to keep the radiation hazard insignificant (Lakehal, et al, 2010 andBaykara et al, 2010).…”

Section: External and Internal Hazard Index (H Ex And H In )mentioning

confidence: 99%

Radioactivity and Environmental Impacts of Some Carboniferous and Cretaceous Kaolin Deposits in Southwestern-Sinai, Egypt

El-Kammar¹,

El-Feky²,

Zied³

et al. 2018

Nuclear Sciences Scientific Journal

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Kaolin deposits are among the world's most important and useful industrial materials. In southwestern Sinai, kaolin occurs interbedded with sandstones in east and northeast Abu Zenima area and in southern Cliff of El Tih plateau. The present work is concerned with the natural radioactivity of these kaolin deposits. Naturally occurring radionuclides are measured radiometrically as well as chemically on the representative kaolin samples from Wadi El Iseila, Wadi El Khaboba and Wadi Abansakar. The main target is to discuss the behavior of the naturally occurring radionuclides and to assess their possible environmental hazards and economic importance. The present work characterizes the main radiometric signatures of the Carboniferous and Cretaceous kaolin resources in the studied areas. Calculated environmental parameters indicate that some kaolin types cannot be used as building or decorative material of dwelling.

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Natural radionuclide concentrations in two phosphate ores of east Algeria

Cited by 28 publications

References 4 publications

Natural radioelement concentrations in fertilizers and the soil of the Mila region of Algeria

Natural radioelement concentrations in fertilizers and the soil of the Mila region of Algeria

Environmental radioactivity of pegmatites associating younger granite of Ras Baroud area, Central Eastern Desert, Egypt.

Radioactivity and Environmental Impacts of Some Carboniferous and Cretaceous Kaolin Deposits in Southwestern-Sinai, Egypt

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