{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/83309"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/83309","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Impacts of Source Zone Architecture on Nonaqueous Phase Liquid Dissolution and Cleanup: A Magnetic Resonance Imaging Study","abstract":"Alternate flushing with water and two surfactant pulses (5∼6 pore volumes) resulted in 63% of NAPL mass removal from both aquifers. However, NAPL mass flux reduction was lower from aquifer 2 (68%) with a shorter correlation length than from aquifer 1 (82%). Local effluent concentrations from aquifer 2 increased by as high as 34 times after surfactant flushing. 3D MR images of NAPL revealed that NAPL migrated downward and created additional pools in previously uncontaminated areas at the bottom of the aquifers. The additional NAPL pools were created in the direction transverse to the flow in aquifer 2, which explains the higher mass flux relative to aquifer 1.","abstract_html":"Alternate flushing with water and two surfactant pulses (5∼6 pore volumes) resulted in 63% of NAPL mass removal from both aquifers. However, NAPL mass flux reduction was lower from aquifer 2 (68%) with a shorter correlation length than from aquifer 1 (82%). Local effluent concentrations from aquifer 2 increased by as high as 34 times after surfactant flushing. 3D MR images of NAPL revealed that NAPL migrated downward and created additional pools in previously uncontaminated areas at the bottom of the aquifers. The additional NAPL pools were created in the direction transverse to the flow in aquifer 2, which explains the higher mass flux relative to aquifer 1.","abstract_has_math":false,"creators":["Zhang, Changyong"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Civil and Environmental Engineering","degree_department":null,"school":null,"contributors":["Werth, Charles J."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-09-25T21:04:12Z","date_published":"2015-09-25T21:04:12Z","updated_at":"2026-07-22T22:26:21Z","subjects":["Engineering, Civil"],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(MiAaPQ)AAI3243041"],"render_values":[{"text":"(MiAaPQ)AAI3243041","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/83309","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Werth, Charles J."]},{"key":"dc:creator","label":"Author","values":["Zhang, Changyong"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015-09-25T21:04:12Z","10000-01-01","2006"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Civil and Environmental Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Engineering, Civil"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/83309","(MiAaPQ)AAI3243041"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Alternate flushing with water and two surfactant pulses (5∼6 pore volumes) resulted in 63% of NAPL mass removal from both aquifers. 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However, NAPL mass flux reduction was lower from aquifer 2 (68%) with a shorter correlation length than from aquifer 1 (82%). Local effluent concentrations from aquifer 2 increased by as high as 34 times after surfactant flushing. 3D MR images of NAPL revealed that NAPL migrated downward and created additional pools in previously uncontaminated areas at the bottom of the aquifers. The additional NAPL pools were created in the direction transverse to the flow in aquifer 2, which explains the higher mass flux relative to aquifer 1.","Made available in DSpace on 2015-09-25T21:04:12Z (GMT). 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