Removing 17β-estradiol from drinking water in a biologically active carbon (BAC) reactor modified from a granular activated carbon (GAC) reactor

Zhongtian Li, Bruce Dvorak, Xu Li

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Estrogenic compounds in drinking water sources pose potential threats to human health. Treatment technologies are needed to effectively remove these compounds for the production of safe drinking water. In this study, GAC adsorption was first tested for its ability to remove a model estrogenic compound, 17β-estradiol (. E2). Although GAC showed a relatively high adsorption capacity for . E2 in isotherm experiments, it appeared to have a long mass transfer zone in a GAC column reactor, causing an early leakage of . E2 in the effluent. With an influent . E2 concentration of 20 μg/L, the GAC reactor was able to bring down effluent . E2 to ~200 ng/L. To further enhance . E2 removal, the GAC reactor was converted to a biologically active carbon (BAC) reactor by promoting biofilm growth in the reactor. Under optimal operating conditions, the BAC reactor had an effluent . E2 concentration of ~50 ng/L. With the empty bed contact times tested, the reactor exhibited more robust . E2 removal performance under the BAC operation than under the GAC operation. It is noted that estrone (. E1), an . E2 biodegradation intermediate, was frequently detected in reactor effluent during the BAC operation. Results from this study suggested that BAC could be an effective drinking water treatment process for . E2 removal and in the meantime . E1 accumulation needs to be addressed.

Original languageEnglish (US)
Pages (from-to)2828-2836
Number of pages9
JournalWater Research
Volume46
Issue number9
DOIs
StatePublished - Jun 1 2012

Fingerprint

Potable water
Activated carbon
activated carbon
drinking water
Carbon
Effluents
carbon
effluent
estrogenic compound
Adsorption
Biofilms
Biodegradation
adsorption
Water treatment
transfer zone
Isotherms
reactor
Mass transfer
Health
leakage

Keywords

  • 17β-estradiol
  • Biologically active carbon
  • Estrone
  • GAC adsorption

ASJC Scopus subject areas

  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution
  • Ecological Modeling

Cite this

Removing 17β-estradiol from drinking water in a biologically active carbon (BAC) reactor modified from a granular activated carbon (GAC) reactor. / Li, Zhongtian; Dvorak, Bruce; Li, Xu.

In: Water Research, Vol. 46, No. 9, 01.06.2012, p. 2828-2836.

Research output: Contribution to journalArticle

@article{f32efaf3b9ed490f969fa3daa4594bfa,
title = "Removing 17β-estradiol from drinking water in a biologically active carbon (BAC) reactor modified from a granular activated carbon (GAC) reactor",
abstract = "Estrogenic compounds in drinking water sources pose potential threats to human health. Treatment technologies are needed to effectively remove these compounds for the production of safe drinking water. In this study, GAC adsorption was first tested for its ability to remove a model estrogenic compound, 17β-estradiol (. E2). Although GAC showed a relatively high adsorption capacity for . E2 in isotherm experiments, it appeared to have a long mass transfer zone in a GAC column reactor, causing an early leakage of . E2 in the effluent. With an influent . E2 concentration of 20 μg/L, the GAC reactor was able to bring down effluent . E2 to ~200 ng/L. To further enhance . E2 removal, the GAC reactor was converted to a biologically active carbon (BAC) reactor by promoting biofilm growth in the reactor. Under optimal operating conditions, the BAC reactor had an effluent . E2 concentration of ~50 ng/L. With the empty bed contact times tested, the reactor exhibited more robust . E2 removal performance under the BAC operation than under the GAC operation. It is noted that estrone (. E1), an . E2 biodegradation intermediate, was frequently detected in reactor effluent during the BAC operation. Results from this study suggested that BAC could be an effective drinking water treatment process for . E2 removal and in the meantime . E1 accumulation needs to be addressed.",
keywords = "17β-estradiol, Biologically active carbon, Estrone, GAC adsorption",
author = "Zhongtian Li and Bruce Dvorak and Xu Li",
year = "2012",
month = "6",
day = "1",
doi = "10.1016/j.watres.2012.03.033",
language = "English (US)",
volume = "46",
pages = "2828--2836",
journal = "Water Research",
issn = "0043-1354",
publisher = "Elsevier Limited",
number = "9",

}

TY - JOUR

T1 - Removing 17β-estradiol from drinking water in a biologically active carbon (BAC) reactor modified from a granular activated carbon (GAC) reactor

AU - Li, Zhongtian

AU - Dvorak, Bruce

AU - Li, Xu

PY - 2012/6/1

Y1 - 2012/6/1

N2 - Estrogenic compounds in drinking water sources pose potential threats to human health. Treatment technologies are needed to effectively remove these compounds for the production of safe drinking water. In this study, GAC adsorption was first tested for its ability to remove a model estrogenic compound, 17β-estradiol (. E2). Although GAC showed a relatively high adsorption capacity for . E2 in isotherm experiments, it appeared to have a long mass transfer zone in a GAC column reactor, causing an early leakage of . E2 in the effluent. With an influent . E2 concentration of 20 μg/L, the GAC reactor was able to bring down effluent . E2 to ~200 ng/L. To further enhance . E2 removal, the GAC reactor was converted to a biologically active carbon (BAC) reactor by promoting biofilm growth in the reactor. Under optimal operating conditions, the BAC reactor had an effluent . E2 concentration of ~50 ng/L. With the empty bed contact times tested, the reactor exhibited more robust . E2 removal performance under the BAC operation than under the GAC operation. It is noted that estrone (. E1), an . E2 biodegradation intermediate, was frequently detected in reactor effluent during the BAC operation. Results from this study suggested that BAC could be an effective drinking water treatment process for . E2 removal and in the meantime . E1 accumulation needs to be addressed.

AB - Estrogenic compounds in drinking water sources pose potential threats to human health. Treatment technologies are needed to effectively remove these compounds for the production of safe drinking water. In this study, GAC adsorption was first tested for its ability to remove a model estrogenic compound, 17β-estradiol (. E2). Although GAC showed a relatively high adsorption capacity for . E2 in isotherm experiments, it appeared to have a long mass transfer zone in a GAC column reactor, causing an early leakage of . E2 in the effluent. With an influent . E2 concentration of 20 μg/L, the GAC reactor was able to bring down effluent . E2 to ~200 ng/L. To further enhance . E2 removal, the GAC reactor was converted to a biologically active carbon (BAC) reactor by promoting biofilm growth in the reactor. Under optimal operating conditions, the BAC reactor had an effluent . E2 concentration of ~50 ng/L. With the empty bed contact times tested, the reactor exhibited more robust . E2 removal performance under the BAC operation than under the GAC operation. It is noted that estrone (. E1), an . E2 biodegradation intermediate, was frequently detected in reactor effluent during the BAC operation. Results from this study suggested that BAC could be an effective drinking water treatment process for . E2 removal and in the meantime . E1 accumulation needs to be addressed.

KW - 17β-estradiol

KW - Biologically active carbon

KW - Estrone

KW - GAC adsorption

UR - http://www.scopus.com/inward/record.url?scp=84860498008&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84860498008&partnerID=8YFLogxK

U2 - 10.1016/j.watres.2012.03.033

DO - 10.1016/j.watres.2012.03.033

M3 - Article

VL - 46

SP - 2828

EP - 2836

JO - Water Research

JF - Water Research

SN - 0043-1354

IS - 9

ER -