Efficacy of removal of CCL viruses under enhanced coagulation conditions

Morteza Abbaszadegan, Brooke K. Mayer, Hodon Ryu, Nena Nwachuku

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

The focus of coagulation as a water treatment process is shifting to accommodate recent regulatory additions that strive to balance the risks between microbial and chemical contamination of drinking water. In this work, enhanced coagulation using increased ferric chloride dose and/or pH adjustment was evaluated for removal efficacy of viruses on the United States Environmental Protection Agency (USEPA) Contaminant Candidate List (CCL), their surrogates, and dissolved organic carbon (DOC). Jar tests demonstrated that optimal DOC removal was achieved using 40 mg/L FeCl3 at a pH between 5 and 6. Under these conditions, bench-scale testing resulted in a maximum removal of 2.58 log units of adenovirus type 4, 2.50 log units of feline calicivirus, 2.32 log units of MS2, 1.75 log units of PRD1, 1.52 log units of phi-X174, 2.49 log units of fr, and 56% of DOC. The trend in virus removals (MS2 and fr > PRD1 and phi-X174) was consistent between bench- and pilot-scale testing; however, pilot-plant removals exceeded bench-scale removals. Feline calicivirus was more efficiently removed than the bacteriophages, thereby suggesting potential for the bacteriophages as suitable surrogates, with MS2 and fr being more representative and PRD1 and phi-X174 (which were removed to a lesser extent) more conservative. The bacteriophages do not appear to be appropriate surrogates for adenovirus.

Original languageEnglish (US)
Pages (from-to)971-977
Number of pages7
JournalEnvironmental Science and Technology
Volume41
Issue number3
DOIs
StatePublished - Feb 1 2007

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Coagulation
Viruses
coagulation
virus
Bacteriophages
Impurities
Organic carbon
pollutant
bacteriophage
dissolved organic carbon
Chemical contamination
Descaling
Environmental Protection Agency
Testing
Pilot plants
Water treatment
Potable water
Drinking Water
removal
water treatment

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Science(all)
  • Environmental Chemistry

Cite this

Efficacy of removal of CCL viruses under enhanced coagulation conditions. / Abbaszadegan, Morteza; Mayer, Brooke K.; Ryu, Hodon; Nwachuku, Nena.

In: Environmental Science and Technology, Vol. 41, No. 3, 01.02.2007, p. 971-977.

Research output: Contribution to journalArticle

Abbaszadegan, Morteza ; Mayer, Brooke K. ; Ryu, Hodon ; Nwachuku, Nena. / Efficacy of removal of CCL viruses under enhanced coagulation conditions. In: Environmental Science and Technology. 2007 ; Vol. 41, No. 3. pp. 971-977.
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