The Use of Reverse Osmosis for the Removal of As(III) and As(V) in Drinking Water
Garcia Ortiz, Christian Adriana (2012)
Garcia Ortiz, Christian Adriana
Metropolia Ammattikorkeakoulu
2012
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2012120317983
https://urn.fi/URN:NBN:fi:amk-2012120317983
Tiivistelmä
The following thesis project was designed to collect data on the use of reverse osmosis for arsenic removal in drinking water and to explore economic methods for sample analysis with emphasis on the use of an ion exchange resin for arsenic speciation. The data collected was meant for verification of existing results, finding an optimal operating point for the reverse osmosis unit provided by Malthe Winje DWS, and to determine whether double filtration by reverse osmosis increases the removal efficiency of As(III). Testing and analysis was conducted at the Norwegian University of Life Sciences, UMB (Ås, Norway).
After analysis of results, it was determined that filtration by reverse osmosis can remove As(V) more efficiently than As(III). Operating the reverse osmosis unit at higher filtrate flows also results in higher removal rates of As. Lastly, while it was verified that reverse osmosis is an advanced treatment option for As removal, it was also determined that double filtration by reverse osmosis may not be a practical option for removal of As in drinking water.
After analysis of results, it was determined that filtration by reverse osmosis can remove As(V) more efficiently than As(III). Operating the reverse osmosis unit at higher filtrate flows also results in higher removal rates of As. Lastly, while it was verified that reverse osmosis is an advanced treatment option for As removal, it was also determined that double filtration by reverse osmosis may not be a practical option for removal of As in drinking water.