Beryllium in contaminated soils: Implication of beryllium bioaccessibility by different exposure pathways

Desorption and Migration Behavior of Beryllium from Contaminated Soils: Insights for Risk-Based Management

“…The untreated (spiked) soil showed two distinct FTIR peaks at 1092 and 1034 cm –1 , which could be attributed to the presence of Be–O/OH bonds (i.e., associated with oxyhydroxides of metals or organic functional groups in soils), as similar information was also reported in the literature. ,, A significant flattening of the FTIR peaks (at 1092 and 1034 cm –1 ) was found after the desorption (using sequential leaching) of Be from the spiked soil to F1 to F4 (Figure C), which could be attributed to the splitting of Be–O/OH bonds in soils during the leaching experiment. Islam et al reported that the addition of Be in the LFLS soil resulted in developing two FTIR peaks at 1092 and 1034 cm –1 , which disappeared after the desorption of Be using bioaccessibility extraction, which is consistent with this study for the sequential leaching process. However, Fe–O–H, Al–O–Si, Si–O–Si, and Si/Al–O bonds are also present at around 450–1200 cm –1 , as reported in the literature. ,, Specifically, Krivoshein et al reported Si–O stretching vibration (quartz and clay minerals) at 1020–950 cm –1 ; (Mg/Al)–OH vibration (illite and smectite minerals) at 950–600 cm –1 ; and iron oxides at 700–600 cm –1 , and minor shifts of the peaks at around 916, 796, 692, and 536 cm –1 were found after Be desorption, which suggests the dissolution of Be with other elements during sequential leaching.…”

“…At present, the concentration of Be in the soils investigated is low (0.39–0.66 mg/kg), but there is the potential for it to be increased in the future through the release of Be from the waste trenches. To represent a potential moderate increase of Be in soils, the soil samples were spiked with 10 mg of Be/L solution (0.6 mL/g soil) and incubated for 20, 50, and 150 days at 60% water holding capacity (field capacity) . The total amounts of Be in the soils (spiked Be and pre-existing Be in the natural/field soil) were determined using microwave acid digestion, followed by inductively coupled plasma mass spectroscopy (ICP–MS, PerkinElmer, USA).…”

“…The untreated (spiked) soil showed two distinct FTIR peaks at 1092 and 1034 cm −1 , which could be attributed to the presence of Be−O/OH bonds (i.e., associated with oxyhydroxides of metals or organic functional groups in soils), as similar information was also reported in the literature. 13,63,64 A significant flattening of the FTIR peaks (at 1092 and 1034 cm −1 ) was found after the desorption (using sequential leaching) of Be from the spiked soil to F1 to F4 (Figure 7C), which could be attributed to the splitting of Be−O/OH bonds in soils during the leaching experiment. Islam et al 64 reported that the addition of Be in the LFLS soil resulted in developing two FTIR peaks at 1092 and 1034 cm −1 , which disappeared after the desorption of Be using bioaccessibility extraction, which is consistent with this study for the sequential leaching process.…”

“…13,63,64 A significant flattening of the FTIR peaks (at 1092 and 1034 cm −1 ) was found after the desorption (using sequential leaching) of Be from the spiked soil to F1 to F4 (Figure 7C), which could be attributed to the splitting of Be−O/OH bonds in soils during the leaching experiment. Islam et al 64 reported that the addition of Be in the LFLS soil resulted in developing two FTIR peaks at 1092 and 1034 cm −1 , which disappeared after the desorption of Be using bioaccessibility extraction, which is consistent with this study for the sequential leaching process. However, Fe−O−H, Al−O−Si, Si−O−Si, and Si/Al−O bonds are also present at around 450−1200 cm −1 , as reported in the literature.…”

“…To represent a potential moderate increase of Be in soils, the soil samples were spiked with 10 mg of Be/L solution (0.6 mL/g soil) and incubated for 20, 50, and 150 days at 60% water holding capacity (field capacity). 64 The total amounts of Be in the soils (spiked Be and pre-existing Be in the natural/field soil) were determined using microwave acid digestion, 70 followed by inductively coupled plasma mass spectroscopy (ICP−MS, PerkinElmer, USA). All reagents and chemicals used in this study were of analytical grade (see Supporting Information).…”