Al-Masri M S, Nashawati A, Amin Y, Al-Masri W, Al-Howary M A
Department of Protection and Safety, Atomic Energy Commission of Syria, P.O. Box 6091, Damascus, Syria.
Bull Environ Contam Toxicol. 2019 Feb;102(2):239-245. doi: 10.1007/s00128-018-2506-2. Epub 2018 Nov 24.
Speciation of U, Po and Pb in six different types of Syrian soil (Entisols, Inceptisol, Aridisol, Mollisols, Vertisols and Rock outcrops) was studied using a four-step sequential extraction procedure. The binding nature of U, Po and Pb was correlated with soil properties including soil particles, pH, EC, OM, sand, silt and clay. The results showed that the exchangeable and carbonate fractions of U did not exceed 10%. In addition, the U, Po and Pb fractions bonded to organic matter increased as the soil clay content decreased. The highest Po fraction was found to be bonded to soil Fe/Al/Mn-oxides for Entisols soils (56%) and silica for Aridisol soils (53%). Soil clay content showed a linear correlation with Po concentrations in soils ranging from 0.34 to 0.91. The results are considered useful in assessing the risks resulting from soils contaminated by naturally occurring radioactive material from the phosphate and oil industry.
采用四步连续提取法研究了叙利亚六种不同类型土壤（新成土、始成土、干旱土、软土、变性土和岩石露头）中铀、钋和铅的形态。铀、钋和铅的结合特性与土壤性质相关，包括土壤颗粒、pH值、电导率、有机质、砂、粉砂和黏土。结果表明，铀的可交换态和碳酸盐态含量不超过10%。此外，随着土壤黏土含量的降低，与有机质结合的铀、钋和铅的含量增加。对于新成土，发现与土壤铁/铝/锰氧化物结合的钋含量最高（56%）；对于干旱土，与二氧化硅结合的钋含量最高（53%）。土壤黏土含量与土壤中钋浓度在0.34至0.91之间呈线性相关。这些结果被认为有助于评估因磷酸盐和石油工业中天然放射性物质污染土壤而产生的风险。
