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Frontiers of Environmental Science & Engineering

ISSN 2095-2201

ISSN 2095-221X(Online)

CN 10-1013/X

Postal Subscription Code 80-973

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Front Envir Sci Eng Chin    2009, Vol. 3 Issue (1) : 98-105    https://doi.org/10.1007/s11783-009-0006-7
RESEARCH ARTICLE
Controlling various contaminants in wastewater effluent through membranes and engineered wetland
Sarper SARP, Sungyun LEE, Noeon PARK, Nguyen Thi HANH, Jaeweon CHO()
Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 500-712, Korea
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Abstract

For effective wastewater reclamation and water recovery, the treatment of natural and effluent organic matters (NOM and EfOM), toxic anions, and micropollutants was considered in this work. Two different NOM (humic acid of the Suwannee River, and NOM of US and Youngsan River, Korea), and one EfOM from the Damyang wastewater treatment plant, Korea, were selected for investigating the removal efficiencies of tight nanofiltration (NF) and ultrafiltration (UF) membranes with different properties. Nitrate, bromate, and perchlorate were selected as target toxic anions due to their well known high toxicities. Tri-(2-chloroethyl)-phosphate (TCEP), oxybenzone, and caffeine, due to their different Kow and pKa values, were selected as target micropollutants. As expected, the NF membranes provided high removal efficiencies in terms of all the tested contaminants, and the UF membrane provided fairly high removal efficiencies for anions (except for nitrate) and the relatively hydrophobic micropollutant, oxybenzon
Keywords wastewater reclamation      natural organic matter (NOM)      effluent organic matter (EfOM)      membranes      wetlands     
Corresponding Author(s): CHO Jaeweon,Email:jwcho@gist.ac.kr   
Issue Date: 05 March 2009
 Cite this article:   
Sarper SARP,Sungyun LEE,Noeon PARK, et al. Controlling various contaminants in wastewater effluent through membranes and engineered wetland[J]. Front Envir Sci Eng Chin, 2009, 3(1): 98-105.
 URL:  
https://academic.hep.com.cn/fese/EN/10.1007/s11783-009-0006-7
https://academic.hep.com.cn/fese/EN/Y2009/V3/I1/98
membranetype and materialsMWCO/Dacontact angle, as measured by sessile drop methodpure water permeability/(L?m-2?d-1)
FL (RO)thin film composite,polyamide~7021.5±1.681.1 at 896—965 kPa
NE90 (tight NF)thin film composite,polyamide~11038.7±1.851.1 at 482—552 kPa
GM (tight UF)thin film composite,polyamide~370037.2±1.831.1 at 276—345 kPa
Tab.1  Properties of the tested membranes
Fig.1  Zeta potential values for tested membranes
Fig.2  MWCO results for selected membranes
micropollutantsmolecular weight/Dachemical structurepKalogKow
caffeine194.26.1<0
TCEP285.5—1.44
oxybenzone228.1—3.79
Tab.2  Characteristics of tested micropollutants
pollutant solutionFL (RO)/(mg?L-1) or (μg?L-1)NE90 (tight-NF)/ (mg?L-1) or (μg?L-1)GM (tight-UF)/ (mg?L-1) or (μg?L-1)pHconductivity/(μS?cm-1)
Suwannee River NOMa)3.2 of TOCa)2.2 of TOCa)2.2 and a)2.4 of TOC8.13.2
Youngsan River NOMa)3.9 of TOCa)3.2 of TOCa)3.4 and a)2.6 of TOC7.0210
Damyang WWTP EfOMa)7.5 of TOCa)7.8 of TOCa)7.3 and a)6.6 of TOC7.0472
nitratea)40a)40 and a)250a)40**
bromateb)100b)100b)100**
perchlorateb)100b)100b)100**
TCEPb)1.0b)1.0b)1.0 and b)3.5**
oxybenzoneb)1.0b)1.0b)1.0 and b)3.5**
caffeineb)3.5b)3.5b)3.5**
Tab.3  Initial conditions of pollutant solutions for membrane filtration experiments
Fig.3  XAD 4/8 separation results for selected EfOM and NOMs
Fig.4  NOM and EfOM removal efficiencies by selected membranes
Fig.5  Nitrate, bromate, and perchlorate removal efficiencies by selected membranes
Fig.6  Caffeine, oxybenzone, and TCEP removal efficiencies by tested membranes
Fig.7  Effect of initial concentration and presence of humic acid (HA, 10 mg/L) on nitrate and perchlorate removals by the NE90 membrane
Fig.8  Removals of nitrate and selected micropollutants in the wetlands
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