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Tools to Remove Arsenic






Arsenic contamination of the underground water is natural and has become one of the biggest reasons of water poisoning. Arsenic contamination of the groundwater is found in many countries of the world and needs serious treatments. Arsenic is carcinogen and a root cause of many diseases, including cancers of lungs, skin and bladder along with cardiovascular disease. There are different water purification solutions that can help in the removal of arsenic from water. These are generally divided in two categories.  

Small-scale water treatments

One of the simplest and cost effective methods of arsenic removal is done by Sono arsenic filters that use three pitchers with sand and cast iron turning in first pitcher, activated carbon, sand and wood in second. Plastic buckets are also used as the filter containers.  
Under the sinks, units are also used for the removal of arsenic from water by some countries. This is also known as the point of use treatment. Most popular kind of domestic treatment makes use of absorption technology or the reverse osmosis. Activated aluminia and ion exchange are also used for the same but not that often.  

Large-scale water treatments

Some countries have to meet the water standards before the water is supplied to residencies. This demands large-scale water treatment. Effectiveness of various methods of water purification used is dependent on chemical composition of water. Aqueous chemistry of the arsenic is complex and affects the removal rate achieved by the specific process only. 

Filtration or coagulation is used for the removal of arsenic by absorption and coprecipitation using iron coagulants. Coagulation using alum is already used by various utilities for removing suspended solids and arsenic. Iron oxide filters for absorption help in filtering the water through granular medium that contains ferric oxide, which has higher affinity for absorption of dissolved metals like arsenic. Iron oxide medium slowly becomes saturated and needs replacement.
  
Activated aluminum is another type of filter medium that can effectively remove the dissolved arsenic. It is also being used for the removal of undesirably high concentrations of the fluoride. Ion exchange has also been used for the removal of fluoride in high concentrations. It has been used as water softening processes on the single home basis too. With the net ionic charge, it helps in removing arsenic.  

Both electrolysis and reverse osmosis can be helpful in removing arsenic with the net ionic charge. One of the latest technologies used for pressing this problem is in the form of SAR process. In this process, groundwater is recharged into aquifer for creating an oxidation zone that helps in coprecipitating arsenic and iron. Oxidization zone is created by arsenic oxidizing the microorganisms that are helpful in enzymatically oxidizing arsenic. SAR is also considered waste free and chemical free solution for the low cost arsenic removal from the groundwater.  

The above-mentioned tools are successful in removing arsenic from water. Therefore, do not fear arsenic contamination as various processes successfully help in the removal of arsenic from the ground water while avoiding diseases and poisoning.

About Author Jaceline Peirrera :

Jaceline Peirrera is an executive for DynGlobal a leading global provider of <a href="http://dynglobal.com/index.php?page=water-purification" target="_blank">water purifiers</a> and <a href="http://dynglobal.com/index.php?page=water-purification" target="_blank">water treatment plants</a>. DynGlobal is committed to helping provide clean, safe drinking water and renewable energy solutions to those on our planet facing environmental challenges and disaster response.


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Article Added on Tuesday, May 4, 2010
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