The Impact of Inoculation of Two Strains of Rhizobacteria on Radionuclide Transfer in Sesbania Grandiflora.

Transfer factors of some naturally-occurring and artificial radionuclides from an agricultural soil to rhizobacteria-treated Sesbania grandiflora, a small leguminous tree, were studied. Two plant growth promoting rhizobacteria (PGPR) strains (SCR17 and PCE2) were used to carry out an agricultural experiment in pots in semi-arid region (Syria). The results showed the bacterial strain (SCR17) increased the transfer and accumulation of U and K in Sesbania grandiflora, while both bacterial strains showed no effect on the accumulation of Th, Ra, Po and Pb in the treated plants.

Assessment of natural radionuclide transfer factors and partition coefficients in some Syrian soils.

Transfer factors of radium 226(Ra), lead 210(Pb), polonium 210 (Po), uranium 238 (U) and thorium 234(Th) from five different agricultural soils in Syria to coriander, parsley and mint were investigated in a pot culture experiment. Geometric means of transfer factors (TF)wereRa (0.13),Pb(0.

An innovative procedure for NORM scales treatment and radionuclides separation.

The present study focuses on the development of a new chemical treatment method for naturally occurring radioactive materials (NORM) scale wastes from the oil industry. The method consists of three-stages, including the separation of oil using the Fenton oxidation process at room temperature, the complete dissolution of soluble and slightly soluble salts and separation of Ra and Pb isotopes. The proposed method can be considered as an innovative procedure for NORM scales treatment and radionuclides separation, which in turn support the radioactive waste management with economic benefits.

A Study on Sorption of (226)Ra on Different Clay Matrices.

The sorption of radium 226 ((226)Ra) on different clay materials (bentonite, illite and a mixture of bentonite-illite) was studied. Clay materials are used in the construction of disposal pits for technically enhanced naturally occurring radioactive materials (TENORM) wastes (i.e.

Characterization of NORM solid waste produced from the petroleum industry.

The accumulation of scales in the production pipe lines is a common problem in the oil industry, reducing fluid flow and leading to costly remediation and disposal programmes. Thus, an accurate determination of the activity of the radionuclides in scale samples is essential for environmental protection. The present study focuses on the characterization of naturally occurring radioactive materials (NORM) in scales generated from the petroleum industry to develop a suitable NORM waste management plan.

Monitoring of ¹³⁷Cs fallout in Syrian environment.

This paper presents measurements of cesium 137 ((137)Cs) in the Syrian environment during the period between 2006 and 2010. More than 1,000 samples of soil, water, plants and aquatic life were collected from different locations. The measurements were realized using gamma spectroscopy, and the results showed that radioactivity concentrations were low overall.

Radiological impacts of phosphogypsum.

This study was carried out to assess the radiological impact of Syrian phosphogypsum (PG) piles in the compartments of the surrounding ecosystem. Estimating the distribution of naturally occurring radionuclides (i.e.

Hepatic perfusion scintigraphy. Relationship of liver perfusion and ascites in patients with liver cirrhosis.

Radionuclide studies were performed on 38 patients with biopsy proven liver cirrhosis in an attempt to evaluate the interrelationship between liver perfusion and ascites in cirrhotic patients. Quantitative hepatic scintigraphy was used to evaluate the relative contribution of hepatic arterial and portal venous blood flow to the hepatic circulation. Using a gamma camera and on-line computer system, a bolus of 370 MBq Tc-99m pertechnetate was injected intravenously.