Arsenic removal from water with activated tin dioxide
Due to the enrichment of arsenic and other toxic heavy metals, the water quality is deteriorating day by day. In particular, arsenic may be consumed with drinking water, which is of great menace to human beings. Thus, it is necessary to find out an effective method to remove arsenic from water. Activated tin dioxide (ATD) is one of the promising methods for arsenic removal from drinking water.
ATD, a kind of oxide semiconductor, is an effective adsorbent for environmental remediations. Its large structure and high efficiency of arsenic removal make it popular for water treatment. It can remove a variety of trace metals, such as arsenic, copper, lead, cadmium and mercury, from drinking water.
ATD works by adsorption process, which is a surface phenomenon that relies on the forces between the adsorbent and the adsorbed material. It is usually done through the physical and chemical reactions. In the adsorption process, the ATD attracts and binds with the arsenic molecules, thus removing them from the water.
The most efficient use of ATD for arsenic removal from drinking water is in the sorption process of the modified ATD. In this process, the ATD is altered at the nano level, and then treated with specific chemicals to improve its adsorption capacity. This modified ATD is fitted with a large number of nanoparticles on its surface, which increase its surface area and thus, facilitate the adsorption process.
The modified ATD has a great capacity for arsenic removal, which is many times higher than the normal ATD. This is because the surface area of the ATD, when modified, is much larger than that of the normal ATD, thus allowing the maximum amount of adsorbed material onto its surface. This increase in adsorbed material effectively reduces the amount of arsenic present in the water.
Thus, ATD is an effective and affordable method for the removal of arsenic from drinking water. It is a cost effective option, as it requires no special setup for arsenic removal. Moreover, it can remove a variety of toxics from drinking water. The modified ATD also has a high capacity for arsenic removal and it can be used in a variety of ways. Therefore, ATD is a good option for arsenic removal from drinking water.
