No silver bullet for arsenic in groundwater
Arsenic contamination areas.
Four of these technologies were developed in India: using an electro-chemical arsenic remediation (ECAR) reactor; activated laterite; a combination of sodium bicarbonate, potassium manganite and ferrous chloride; and one that uses ferric hydroxide as arsenic absorbent.
“From a policy perspective, incorporating these recommendations would provide more realistic estimates of cost-effectiveness of alternative technologies,” adds Balasubramanya.
About half achieved the WHO standard, and their efficiencies ranged from 50 to 100 per cent.
“The authors recommend assessing effective arsenic-removal technologies beyond the laboratory in field settings; and expanding the components of costs to include those of fabrication, installation, repair and maintenance,” she notes.