The effects of pH on U(VI)/Th(IV) and Ra(II)/Ba(II) adsorption by polystyrene-nano manganese dioxide composites: Fourier Transform Infra-Red spectroscopic analysis.

Fourier Transform Infra-Red (FTIR) spectroscopy provides structural information of prime importance to understand ions coordination to adsorbents. This consequently aids in the design of improved ion exchange materials and help in deriving the optimum adsorption conditions. In the present work, the adsorption mechanism of both U(VI)/Th(IV) and Ra(II)/Ba(II) radionuclides couples onto polystyrene-nano manganese dioxide (PS-NMO) composite is reported in relation to the effect of working solution pH.

A Styrofoam-nano manganese oxide based composite: Preparation and application for the treatment of wastewater.

Nano-composites were synthesized by the reaction of waste polystyrene (PS) and KMnO. The structure of the composite was controlled by the solvent/non-solvent system and the concentration of KMnO. The FTIR spectra indicated the functionalization of PS and the attachment of NMO with the polymer chains.

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.

Chemical fractionation of radium-226 in NORM contaminated soil from oilfields.

Contamination of soil with Ra is a common problem in the oilfields, leading to costly remediation and disposal programmes. The present study focuses on the chemical fractionation and mobility of Ra in contaminated soils collected from an oilfield using a three-step sequential extraction procedure (BCR). The total activity concentrations of Ra in contaminated soils were measured and found to be in the range from 1030 ± 90 to 7780 ± 530 Bq kg, with a mean activity concentration of 2840 ± 1840 Bq kg.

Dissolution of [²²⁶Ra]BaSO₄ and partial separation of ²²⁶Ra from radium/barium sulfate: A new treatment method for NORM waste from petroleum industry.

Complete dissolution of [(226)Ra]BaSO4 precipitate was successfully performed using NaNO2 as a reducing agent in acidic solution at room temperature. Results showed a significant effect of acid and NaNO2 concentrations and temperature on the dissolution efficiency. The method was successfully used for separation of radium from NORM scale samples from the petroleum industry; sufficient volume reduction of NORM waste was achieved.