Aluminum [Al, 27]

Aluminum (Al) is a metal of the group 13 in the periodic table of elements. Aluminum reveals lithophile properties, and is common in both igneous and sedimentary rocks. Due to its low content, but important functions in plants and humans, it is included in the trace elements group. Aluminum occurs mainly at 3+ oxidation stage and is a common component of several minerals, especially silicates. Aluminum concentration in drinking water is under the control, and its acceptable levels vary with different countries, from 50 to 200 g/L. Its content may vary highly, depending on both soil factors and plant species. Aluminum is a common constituent of all plants. Its content may vary highly, depending on both soil factors and plant species. Aluminum is a nonessential metal, to which humans are frequently exposed by systemic absorption of Al ingested from water, foods, drugs, and air. In lungs, it may be from environmental-derived particles, occupational exposure, and distribution from the blood.