Concerns about dust contamination with potentially toxic elements are especially important in environments such as schools (particularly elementary schools) because children are more vulnerable to contaminants than adults. Therefore, due to the diversity of air pollution sources in Tehran, the present study was conducted to determine the severity of pollution, origin and health risk assessment ...

Cadmium (Cd) is a heavy metal which is toxic to human, plants and all other organisms. Among heavy metals, Cd mobility and phytoavailability in soils is of great concern due to the fact that even at low concentrations may cause toxicity. Thus its behavior in soils needs further investigation. A greenhouse experiment was carried out to examine the effect of Cd and two zinc (Zn) sources (sulfate ...

  One of the most significant characteristics of Shia heritage is said to be the fact that it is provided in written discourse. From their outset, Hadiths that are attributed to Prophet and Imams have always been conveyed to the next generation through books and Shia’s principles. Then, Authors of Hadith bookss, especially writers of The Four Books, gathered them together and provided a written...

Background and Objective: Street dust is considered as one of the important sources of particulate matters and heavy metals in the atmosphere. The goal of this study was to assess the heavy metals pollution in street dust of Tehran and evaluate their ecological risk. Materials and Methods: The sampling of street dust was carried out in two areas at the east and west of Tehran. After preparatio...