Nanomagnetite enhances sand filtration for removal of arsenic from drinking water

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dc.contributor.advisorTomson, Mason B.
dc.creatorFarrell, Jesse Walter
dc.date.accessioned2011-07-25T02:07:23Z
dc.date.available2011-07-25T02:07:23Z
dc.date.issued2010
dc.description.abstractArsenic in drinking water affects millions globally causing skin disease and cancers of the liver, stomach, and bladder. Large-scale treatment removes arsenic effectively; however, community- and home-scale treatments are typically less effective, more costly, or labor intensive. Nanomagnetite would enable effective, economical arsenic removal in low maintenance, household sand filters. Adsorption isotherms were used to display the As(V) capacity of nanomagnetite in a variety of natural waters and pH conditions. Column design and operating conditions were assessed for optimal removal. Breakthrough was most affected by nanomagnetite percentage, residence time, inlet concentration, and nanomagnetite aggregate size. NH4OH regenerated the nanomagnetite, allowing for repeated use. No detectable nanomagnetite escaped the column; however, permanent magnets were shown to capture >98% of nanomagnetite aggregates from a fluid stream. A case study proposes the use of nanomagnetite to treat arsenic contaminated groundwater in Guanajuato, Mexico to below the Mexican EPA drinking water standard for $0.23/m3.
dc.format.mimetypeapplication/pdf
dc.identifier.callnoTHESIS C.E. 2010 FARRELL
dc.identifier.citationFarrell, Jesse Walter. "Nanomagnetite enhances sand filtration for removal of arsenic from drinking water." (2010) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/62196">https://hdl.handle.net/1911/62196</a>.
dc.identifier.urihttps://hdl.handle.net/1911/62196
dc.language.isoeng
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.
dc.subjectSanitary and municipal engineering
dc.subjectEnvironmental science
dc.subjectEnvironmental engineering
dc.titleNanomagnetite enhances sand filtration for removal of arsenic from drinking water
dc.typeThesis
dc.type.materialText
thesis.degree.departmentChemical and Biomolecular Engineering
thesis.degree.disciplineEngineering
thesis.degree.grantorRice University
thesis.degree.levelMasters
thesis.degree.nameMaster of Science
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