What are the treatment options for removing Arsenic?
POU/POE Treatment options Adsorption: Advantages 1. No wasted water 2. Removal of both As (III) and (V) 3. Removal of other heavy metals such as flouride, copper, etc. 4. Safe handling and disposal. 5. Spent media meets EPA TCLP 6. Low cost option 7. No chemicals or regeneration required Challenges 1. Requires certain contact time for optimal effectiveness 2. Competing ions in water can reduce capacity 3. Performance decreases with higher pH Reverse Osmosis: Advantages 1. Effectively reduces arsenic (V) 2. Provides high quality drinking water, removing other dissolved contaminants 3. Improves taste/odor, aesthetics 4. Arsenic (V) removal efficiency Challenges 1. Not effective for As (III) without preoxidation 2. High cost if arsenic is primary target contaminant 3. Not suitable for POE systems due to corrosion and affordability 4. Requires proper attention and routine maintenance 5. Wastes 3-5 gallons of water for every treated gallon Treatment options for central treatment systems Coa
