Heavy Metals Composition of Indoor Dust in Nursery Schools Building

Analysis of Selected Heavy Metals in Indoor Dust in Khorramabad City, Iran: A Case Study

“…The obtained results are against the findings of Lin et al, (2015), who reported that the values of Cr in indoor dust samples collected from Anhui rural, China, was 113.68 mg/kg (30). Compared with indoor dust from other cities, Darus et al, (2012), reported that the content of Cr in indoor dust samples collected from Shah Alam, Malaysia with an average of 16.88 were lower than the MPC (7). Also Akhter and Madany (1993) reported that against the current study, the Cr content in the house dust collected from Bahrain with an average of 144.7 mg/kg was much higher than the MPC (42).…”

“…Nickel content in the literature has been found in the range of 17.06 mg/kg to 127.25 mg/kg in indoor dust in Anhui rural, China (12). Also, Ni concentrations (mg/kg) in indoor dust collected from an industrial area in China was detected in amounts ranging from 29.60 to 67.10 (36), while Darus et al, (2012), reported that the mean concentration of Ni in indoor dust was 9.0 mg/kg (7). A comparison of our findings with other studies is shown in Table 2.…”

“…Although, the geological structure of the study area (i.e. existence of calcareous stones and clayey limestone) (35) and use of metal-containing pesticides, especially chromated copper arsenate in agricultural activities, may have been leads to the analyzed dust samples contamination to Cr (7,15). The obtained results are against the findings of Lin et al, (2015), who reported that the values of Cr in indoor dust samples collected from Anhui rural, China, was 113.68 mg/kg (30).…”

“…Also, the Ni concentration, with an average of 60.19 mg/kg, was much higher than the MPC. As the literature shows, the source of Ni in dust is believed to be from lubricants corrosion of cars, tyre abrasion, brushing, engine wear, brake dust, and bearing metals (7,19). Although, due to the fact that the mean content of Ni was greatly higher than background value of this element in soils (31 mg/kg) (45), Ni in dust samples may originated from natural source such as soil erosion.…”

Exposure Assessment of Allergens and Metals in Settled Dust in French Nursery and Elementary Schools

“…However, some studies that focused on metal concentration in indoor dust in schools can be found. Darus et al [24] studied the indoor floor dust in three nursery schools in Malaysia and found that the heavy metal concentrations followed the order Fe > Al > Zn > Pb > Ba > Cu > Cr > Ni, with Fe reaching 7919 mg·kg defined by the French Committee of Public Health (HCSP) that motivates childhood Pb poisoning screening [27]. This recently established guideline is consistent with the threshold of 64-128 µg·m −2 defined by Dixon et al [28] for protecting children from high blood Pb levels (PbB ≥ 10 μg/dL).…”