Assessment of radioactivity concentration in intertidal sediments from coastal provinces in Oman and estimation of hazard and radiation indices

Shaaibi, Mohammed Al; Ali, Juma; Duraman, Norazimah; Tsikouras, Basilios; Masri, Zarifi

doi:10.1016/j.marpolbul.2021.112442

Cited by 12 publications

(3 citation statements)

References 11 publications

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“…Table 2 showed that the mean values of 238 U in the Jeddah marine sediment were lower than that reported in Saudi Arabia and other countries except for the Arabian Gulf [48], Addurrah beach [49], Egyptian Gulf of Suez [23], Egyptian Mediterranean Sea [69], and Turkey [80]. The mean activity concentrations of 232 Th in Jeddah marine sediments were lower than all other locations in the world except for the Arabian Gulf [48], Farasan Island [46], Oman [81], and Turkey [80]. Conversely, the 40 K mean values were higher than all other locations in the world except Addurrah beach [49], Serbia [82], Cyprus [4], and Bangladesh [32].…”

Section: Activity Concentrationsmentioning

confidence: 76%

Radiation Hazard from Natural Radioactivity in the Marine Sediment of Jeddah Coast, Red Sea, Saudi Arabia

Al-Mur

Gad

2022

JMSE

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Marine sediment samples were collected along the Jeddah coast, Red Sea, Saudi Arabia, in order to assess radiation hazards and the exposure to human and marine living organisms. Using collaborative techniques, grain size, mineralogical characteristics, and natural radioactivity were investigated. To examine the influence of sediment characteristics over the distribution of the measured radionuclides, resulting data were statistically processed by using multivariate analyses. 238U, 232Th, and 40K levels were specified to be 19.50, 9.38, and 403.31 Bq kg−1, respectively. Radionuclides distributions were affected by sediment mud content, organic matter, and heavy minerals index. The calculated radiation risk parameters are within the safe range and lower than the global average. Natural radiation from these marine sediments is normal and poses no significant radiological risk to the public or marine living organisms. The natural radioactivity of the marine sediment in this Jeddah coastline will have to be monitored on a regular basis to avoid overexposure to the residents.

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Section: Activity Concentrationsmentioning

confidence: 76%

Radiation Hazard from Natural Radioactivity in the Marine Sediment of Jeddah Coast, Red Sea, Saudi Arabia

Al-Mur

Gad

2022

JMSE

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“…This index was estimated through Eq. ( 8b ) 57 , involving 226 R activity concentration (AC Ra ) in Bq/kg. It is noted that if the AC Ra in a building material exceeds 200 Bq/kg (I α > 1), it may result in indoor radon (Rn) concentrations surpassing the allowable level of 200 Bq/m 3 .…”

Section: Resultsmentioning

confidence: 99%

Geochemical characteristics, hazards impact assessment and radiogenic heat production of the alkaline rocks

Sidique,

Elhaddad,

Sami

et al. 2024

Sci Rep

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This study primarily investigates the natural radioactivity level in alkaline rocks collected from the Wadi El-Dib ring complex (WDRC) in North Eastern Desert of Egypt, and assesses potential health risks associated with their use as decorative building materials. The work was accomplished using a high-purity germanium detector as well as ICP-MS and ICP-AES techniques. The WDRC composed essentially of trachyte, quartz syenite, granite and syenite. Geochemically, these rocks contain high SiO2 and alkalis with metaluminous to slightly peraluminous features. All rocks contain high concentrations of rare earth elements (∑REEs = 109–1075 ppm), with clear enrichment in light REEs compared to heavy REEs [(La/Yb)N = 8.3–25.3. Radiometrically, the concentrations of the natural radioisotopes (238U, 232Th, and 40K) in the studied rock types surpassed the worldwide average values assigned for building materials by UNSCEAR. This elevation of the radioisotope concentration values is due to the presence of supplement minerals such as monazite, zircon, allanite, and rutile. Granites exhibit the highest mean concentrations of 238U (av. 164.24 ± 14.76 Bq/kg) and 232Th (av. 214.37 ± 23.33 Bq/kg), while trachytes demonstrate the highest 40K (av. 1352.56 ± 65.56 Bq/kg) concentrations. In contrast, syenites exhibite the lowest mean concentrations for 238U (av. 54.51 ± 6.81 Bq/kg) and 232Th (av. 56.76 ± 6.25 Bq/kg), while quartz syenites display the lowest mean concentration of 40K (av. 1144.78 ± 96.19 Bq/kg). The radiogenic heat production (RHP) associated with U, Th, and K range between 1.41 to 9.33 μW/m3, exceeding the typical crustal mean value of 0.8 to 1.2 μW/m3. The radiological parameters and indices evaluating risks of the outdoor and indoor radiation doses due to the investigated rocks were assessed. The results indicated that these rocks meet globally accepted values and safety standards (approved by UNSCEAR, ICRP, and EC) for surface building materials, as well as they underscore the importance of adhering to safety protocols to safeguard workers from radiation exposure within the WDRC area. Ultimately, the data herein provide a valuable database for assessing the compatibility of geochemical data and natural radioactivity level in WDRC rocks. Additionally, it reveals that from the radiological perspective, the investigated rocks are considered safe for use as decorative construction materials.

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“…The H ex and H in were calculated using Eqs (3) and ( 4), respectively, to account for the radiation exposure received by the samples under examination from 226 Ra, 232 Th, and 40 K, both internally and externally (Al Shaaibi et al, 2021).…”

Section: The Indexes Of External Hazards (H Ex ) and Interior Hazards...mentioning

confidence: 99%

The Assessment of Heavy Metals and Natural Radioactivity in the Phosphate Tailings at Minjingu Mines in Tanzania

Mdachi,

Rugaika,

Machunda

2024

J. Ecol. Eng.

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Extraction and processing of the phosphate rocks has produced a massive amount of waste and posed a significant environmental concern. The majority of wastes generated in the fertiliser industry are overburden or waste rocks from mining, and phosphate tailings (PTs) or phosphogyp-sum from the beneficiation process. Phosphate rock mining and beneficiation expose heavy metals and radionuclides into the environment, which are harmful to living things. The purpose of this study was to determine the concentration levels of heavy metals and radionuclides activity in the phosphate tailings at Minjingu mines in northen of Tanzania. Heavy metals content and radionu-clide activity concentration were determined using energy dispersive X-ray fluoresence spectroscopy (ED-XRF) and high pure garmin energy detector (HPGe), respectively. The concentra-tion of heavy metals investigated ranges: Cu -12.9-27.3 mg•kg -1 , Fe -7944.2-19052.2) mg•kg -1 , Mn -410.9-474) mg•kg -1 , Ni -1.9-13.2) mg•kg -1 , Al -3597-13129.2) mg•kg -1 , Zn -195.2-281.7) mg•kg -1 , Pb -0.7-4.5) mg•kg -1 and As -2.7-11.3) mg•kg -1 . The result revealed that, the concentration level of heavy metals (Cu, Fe, Ni, As, and Pb) are below the permissible level while concentration level for Zn has high concentration compared to permissible level limit. However, the activity concentration of radionuclides 226 Ra, 232 Th and 40 K were ranging from 311 to 7,606 Bqkg -1 , 207 to 654 Bqkg -1 and 131 to 762 Bqkg -1 , respectively. The reported results of activity concentration of radionuclides are found to be higher compared to the recommended world value. The study results will be used as a guide for decision making in addressing problems observed in phosphate tailings, including radiation safety standards for workers and environmental systems in phosphate mines.

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Assessment of radioactivity concentration in intertidal sediments from coastal provinces in Oman and estimation of hazard and radiation indices

Cited by 12 publications

References 11 publications

Radiation Hazard from Natural Radioactivity in the Marine Sediment of Jeddah Coast, Red Sea, Saudi Arabia

Radiation Hazard from Natural Radioactivity in the Marine Sediment of Jeddah Coast, Red Sea, Saudi Arabia

Geochemical characteristics, hazards impact assessment and radiogenic heat production of the alkaline rocks

The Assessment of Heavy Metals and Natural Radioactivity in the Phosphate Tailings at Minjingu Mines in Tanzania

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