Iranian Journal of

Background and Objective: Heavy metal (HM) pollution of settled dust on the interior surfaces of elementary schools may affect the health of young students; hence, the health risk of such pollution should be assessed. Therefore, the aims of this study were to measure the content of heavy metals in the settled dust in the indoor of elementary schools in Bandar Abbas and to assess the attributed health risks.
Materials and Methods: In this study, dust samples were collected from the interior surfaces of elementary schools in Bandar Abbas. Settled dust samples were digested using aqua regia solution and then their metals contents were measured using ICP-OES. To assess the health risk attributed to this pollution, daily intake doses through ingestion, inhalation and skin absorption routes were estimated. Then, non-carcinogenic and carcinogenic risks were calculated considering the daily intake doses and toxicity factors.
Results: The average concentrations of arsenic, cadmium, cobalt, chromium, nickel and lead in settled dust were 5.45, 0.58, 11.44, 69.72, 83.95 and 66.72 mg/kg, respectively. The non-carcinogenic risk level for all metals was below threshold, while the carcinogenic risk level for arsenic (2.18×10^-6) exceeded the threshold.
Conclusion: This study showed that the settled dust in elementary schools of Bandar Abbas is polluted with various levels of heavy metals. Health risk assessment showed that the exposure to dust containing heavy metals in the elementary schools of Bandar Abbas does not pose significant non-carcinogenic risk, but the carcinogenic risk of As exceeded the threshold limit and should be considered.

Background and Objective: One of the basic strategies to reduce the prevalence of diseases among people in society, especially children and adolescents, during the epidemic of COVID-19 disease, is to observe hygiene and personal protection behaviors. The present study was conducted to determine the level of compliance with health protocols in primary schools of Ilam city during the outbreak of the SARS-CoV-2 in 1400-1401.
Materials and Methods: This descriptive-cross-sectional study was conducted in primary schools of Ilam city with a statistical sample of 49 schools (25 girls' schools and 24 boys' schools). In this study, the 2019 new coronavirus disease care and control checklist was used in schools, which has 15 questions with a total score of 100. Data with Kolmogorov-Smirnov and T-Test statistical tests using SPSS software. V21 was analyzed.
Results: The results of this study showed that the highest and lowest scores are respectively related to the parameters of school health assessment before reopening (100 percent) and screening of people in terms of vaccination by PCR test (zero percent). The average score of compliance with the checklist was 74.3 in girls' schools and 74.38 in boys' schools. Also, the results of the T-Test showed that there is no significant relationship between the mean scores of girls' and boys' schools (p<0.05).
Conclusion: The results of the present study showed that the score obtained for compliance with the checklist parameters of all schools in Ilam city is less than 85 points, and the main reason for this is the non-compliance of the screening parameter of people in terms of vaccination/PCR test in schools.