While trace amounts of fluorine are essential for life, its excessive intake leads to a disease known as fluorosis. It is a predominant ailment in majority of the countries inclusive of India. It is caused also by drinking fluoride containing water. Retention of fluorine in bones and teeth occurs through F−–(OH−) exchange on their inorganic component known as hydroxylapatite. Endeavour of the present study is to design a column using activated alumina as an adsorbent for continuous defluoridation ofwater for domestic purpose. As a part of it, operational defluoridation capacity of aluminawas determined by variation of different factors (amount of alumina, time, temperature, added salts). A family of four members was taken as a model. The initial and final fluoride concentrations were taken as 2.0 and 0.7 ppm, respectively. Dimension of the unit (adsorbent bed diameter and height) was determined.
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[v1] 2019-06-23 11:47:08
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