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Black Carbon Amended Engineered Media Filters for Improved Treatment of Dissolved Trace Organic Contaminants in Stormwater Runoff- [electronic resource]
Black Carbon Amended Engineered Media Filters for Improved Treatment of Dissolved Trace Organic Contaminants in Stormwater Runoff- [electronic resource]

상세정보

자료유형  
 학위논문
Control Number  
0016934433
International Standard Book Number  
9798380276030
Dewey Decimal Classification Number  
628
Main Entry-Personal Name  
Pritchard, James Conrad.
Publication, Distribution, etc. (Imprint  
[S.l.] : Stanford University., 2022
Publication, Distribution, etc. (Imprint  
Ann Arbor : ProQuest Dissertations & Theses, 2022
Physical Description  
1 online resource(280 p.)
General Note  
Source: Dissertations Abstracts International, Volume: 85-03, Section: A.
General Note  
Advisor: Luthy, Richard.
Dissertation Note  
Thesis (Ph.D.)--Stanford University, 2022.
Restrictions on Access Note  
This item must not be sold to any third party vendors.
Summary, Etc.  
요약Urban stormwater runoff, historically seen as a flooding risk and known to contribute to surface water impairment, is now viewed as one of the few untapped sources of freshwater in water-stressed regions. However, improved treatment is needed to realize stormwater beneficial use, as current stormwater control measures (SCMs) inadequately remove mobile dissolved pollutants including metal and trace organic contaminants (TrOCs). This dissertation investigates black carbon (BC) amended engineered media filters for improved treatment of metals and TrOCs from stormwater runoff. Long-term column experiments and contaminant transport modeling are used to elucidate the kinetic limitations of TrOCs removal for a high-temperature gasification biochar and regenerated activated carbon and push the boundaries of what is possible for stormwater treatment.Six engineered media mixtures are evaluated for both hydraulic performance and TrOCs removal using a novel approach to generate reproducible synthetic stormwater with natural dissolved organic carbon, realistic flow (20 cm hr-1 ) and media sizes (0.42 mm - 1.68 mm), and downflow configuration with outlet controls. These parameters increase the relevance of this study and facilitate transfer to the field. BC amended engineered media are shown to remove nearly all of the TrOCs in the effluent over the course of three-months (480 empty bed volumes) while sample ports spaced along the depth of the filter provide windows to observe contaminant transport.An intraparticle pore diffusion-limited sorption contaminant transport model is then modified and used to describe TrOCs transport within BC amended engineered media filters. Sorption and tortuosity parameters derived from fitting the model to observed contaminant transport are validated by predicting contaminant transport further down the column and are compared to parameters derived from batch isotherms. The model is used to predict the lifetime of a hypothetical filter in Seal Beach, CA and offers insights into the kinetic differences of biochar and regenerated activated carbon.BC amended engineered media filter performance is then assessed at higher flow rates of 40 and 60 cm hr-1 in order to better understand the kinetic limitations of TrOCs removal and to validate the transport model for higher flow conditions. The TrOCs removal is reduced at higher flow rates and the transport model accurately predicts the contaminant breakthrough using parameters derived from the 20 cm hr-1column experiments. Filter performance tables are developed to demonstrate the impacts of the kinetic limitations of TrOCs removal and to disseminate the model results to stormwater practitioners.Lastly, the impacts of dynamic flow and influent loading and variable background dissolved organic carbon conditions on the performance of BC amended engineered media filters are investigated. Changing the flow rates and influent loading concentrations affect TrOCs removal and breakthrough and is well predicted by the transport model. Changing the background dissolved organic carbon concentrations significantly impacts TrOCs removal. The transport model is used to elucidate how high background dissolved organic carbon reduces TrOCs removal by deriving sorption and tortuosity parameters from the observed TrOCs breakthrough curves and comparing these parameters with those from batch isotherms conducted at various dissolved organic carbon concentrations.This research advances our understanding of the performance and modeling of BC amended SCMs at elevated flow rates and offers insights into the kinetic limitations of TrOCs removal. This work makes a tangible contribution to the field of stormwater management in the form of TrOCs transport modeling and filter performance tables that may be used to replace rudimentary assumptions about performance of BC amended SCMs.
Subject Added Entry-Topical Term  
Water quality.
Subject Added Entry-Topical Term  
Zinc.
Subject Added Entry-Topical Term  
Stormwater management.
Subject Added Entry-Topical Term  
Carbon.
Subject Added Entry-Topical Term  
Cadmium.
Subject Added Entry-Topical Term  
Runoff.
Subject Added Entry-Topical Term  
Grain size.
Subject Added Entry-Topical Term  
Pore size.
Subject Added Entry-Topical Term  
Effluents.
Subject Added Entry-Topical Term  
Zeolites.
Subject Added Entry-Topical Term  
Nitrogen.
Subject Added Entry-Topical Term  
Civil engineering.
Subject Added Entry-Topical Term  
Hydraulic engineering.
Subject Added Entry-Topical Term  
Water resources management.
Added Entry-Corporate Name  
Stanford University.
Host Item Entry  
Dissertations Abstracts International. 85-03A.
Host Item Entry  
Dissertation Abstract International
Electronic Location and Access  
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Control Number  
joongbu:642076

MARC

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■1001  ▼aPritchard,  James  Conrad.
■24510▼aBlack  Carbon  Amended  Engineered  Media  Filters  for  Improved  Treatment  of  Dissolved  Trace  Organic  Contaminants  in  Stormwater  Runoff▼h[electronic  resource]
■260    ▼a[S.l.]▼bStanford  University.  ▼c2022
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2022
■300    ▼a1  online  resource(280  p.)
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  85-03,  Section:  A.
■500    ▼aAdvisor:  Luthy,  Richard.
■5021  ▼aThesis  (Ph.D.)--Stanford  University,  2022.
■506    ▼aThis  item  must  not  be  sold  to  any  third  party  vendors.
■520    ▼aUrban  stormwater  runoff,  historically  seen  as  a  flooding  risk  and  known  to  contribute  to  surface  water  impairment,  is  now  viewed  as  one  of  the  few  untapped  sources  of  freshwater  in  water-stressed  regions.  However,  improved  treatment  is  needed  to  realize  stormwater  beneficial  use,  as  current  stormwater  control  measures  (SCMs)  inadequately  remove  mobile  dissolved  pollutants  including  metal  and  trace  organic  contaminants  (TrOCs).  This  dissertation  investigates  black  carbon  (BC)  amended  engineered  media  filters  for  improved  treatment  of  metals  and  TrOCs  from  stormwater  runoff.  Long-term  column  experiments  and  contaminant  transport  modeling  are  used  to  elucidate  the  kinetic  limitations  of  TrOCs  removal  for  a  high-temperature  gasification  biochar  and  regenerated  activated  carbon  and  push  the  boundaries  of  what  is  possible  for  stormwater  treatment.Six  engineered  media  mixtures  are  evaluated  for  both  hydraulic  performance  and  TrOCs  removal  using  a  novel  approach  to  generate  reproducible  synthetic  stormwater  with  natural  dissolved  organic  carbon,  realistic  flow  (20  cm  hr-1  )  and  media  sizes  (0.42  mm  -  1.68  mm),  and  downflow  configuration  with  outlet  controls.  These  parameters  increase  the  relevance  of  this  study  and  facilitate  transfer  to  the  field.  BC  amended  engineered  media  are  shown  to  remove  nearly  all  of  the  TrOCs  in  the  effluent  over  the  course  of  three-months  (480  empty  bed  volumes)  while  sample  ports  spaced  along  the  depth  of  the  filter  provide  windows  to  observe  contaminant  transport.An  intraparticle  pore  diffusion-limited  sorption  contaminant  transport  model  is  then  modified  and  used  to  describe  TrOCs  transport  within  BC  amended  engineered  media  filters.  Sorption  and  tortuosity  parameters  derived  from  fitting  the  model  to  observed  contaminant  transport  are  validated  by  predicting  contaminant  transport  further  down  the  column  and  are  compared  to  parameters  derived  from  batch  isotherms.  The  model  is  used  to  predict  the  lifetime  of  a  hypothetical  filter  in  Seal  Beach,  CA  and  offers  insights  into  the  kinetic  differences  of  biochar  and  regenerated  activated  carbon.BC  amended  engineered  media  filter  performance  is  then  assessed  at  higher  flow  rates  of  40  and  60  cm  hr-1  in  order  to  better  understand  the  kinetic  limitations  of  TrOCs  removal  and  to  validate  the  transport  model  for  higher  flow  conditions.  The  TrOCs  removal  is  reduced  at  higher  flow  rates  and  the  transport  model  accurately  predicts  the  contaminant  breakthrough  using  parameters  derived  from  the  20  cm  hr-1column  experiments.  Filter  performance  tables  are  developed  to  demonstrate  the  impacts  of  the  kinetic  limitations  of  TrOCs  removal  and  to  disseminate  the  model  results  to  stormwater  practitioners.Lastly,  the  impacts  of  dynamic  flow  and  influent  loading  and  variable  background  dissolved  organic  carbon  conditions  on  the  performance  of  BC  amended  engineered  media  filters  are  investigated.  Changing  the  flow  rates  and  influent  loading  concentrations  affect  TrOCs  removal  and  breakthrough  and  is  well  predicted  by  the  transport  model.  Changing  the  background  dissolved  organic  carbon  concentrations  significantly  impacts  TrOCs  removal.  The  transport  model  is  used  to  elucidate  how  high  background  dissolved  organic  carbon  reduces  TrOCs  removal  by  deriving  sorption  and  tortuosity  parameters  from  the  observed  TrOCs  breakthrough  curves  and  comparing  these  parameters  with  those  from  batch  isotherms  conducted  at  various  dissolved  organic  carbon  concentrations.This  research  advances  our  understanding  of  the  performance  and  modeling  of  BC  amended  SCMs  at  elevated  flow  rates  and  offers  insights  into  the  kinetic  limitations  of  TrOCs  removal.  This  work  makes  a  tangible  contribution  to  the  field  of  stormwater  management  in  the  form  of  TrOCs  transport  modeling  and  filter  performance  tables  that  may  be  used  to  replace  rudimentary  assumptions  about  performance  of  BC  amended  SCMs.
■590    ▼aSchool  code:  0212.
■650  4▼aWater  quality.
■650  4▼aZinc.
■650  4▼aStormwater  management.
■650  4▼aCarbon.
■650  4▼aCadmium.
■650  4▼aRunoff.
■650  4▼aGrain  size.
■650  4▼aPore  size.
■650  4▼aEffluents.
■650  4▼aZeolites.
■650  4▼aNitrogen.
■650  4▼aCivil  engineering.
■650  4▼aHydraulic  engineering.
■650  4▼aWater  resources  management.
■690    ▼a0543
■690    ▼a0218
■690    ▼a0454
■690    ▼a0595
■71020▼aStanford  University.
■7730  ▼tDissertations  Abstracts  International▼g85-03A.
■773    ▼tDissertation  Abstract  International
■790    ▼a0212
■791    ▼aPh.D.
■792    ▼a2022
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T16934433▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.
■980    ▼a202402▼f2024

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