TECHNICAL AND ECONOMICAL ANALYSIS OF COAGULATION WITH FERRIC CHLORIDE TO ARSENIC REMOVAL OF GROUNDWATER
Coagulation using ferric chloride followed by flocculation, sedimentation and filtration is an excellent alternative treatment to remove arsenic from drinking water. This paper presents results of a pilot-scale study conducted with groundwater from a well in Torreon, Coahuila, Mexico. The concentration of arsenic in water was 67 μg/ L. At doses of 8.5 mg/L of iron (coagulant) and 0.2 mg/L of an anionic polymer it was possible to obtain an arsenic removal efficiency of 93% and 98% of added iron. The concentration of dissolved solids and pH value of treated water compared to raw water did not change significantly. The sludge generated in the process may be thickened and disposed of in a landfill as it is not a hazardous waste. The cost of treatment per cubic meter was 0.0942 USD, this price includes the cost of reagents and energy.Key Words: arsenic removal, coagulation, treatment cost
| Main Authors: | , , , , , |
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| Format: | Digital revista |
| Language: | spa |
| Published: |
Instituto de Ingeniería, Universidad Nacional Autónoma de México
2011
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| Online Access: | https://www.revistas.unam.mx/index.php/aidis/article/view/26011 |
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