A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Pesticide and Pharmaceutical Abatement within Nonpotable and Potable Reuse Treatment Trains
https://orcid.org/0000-0001-9082-7324
https://orcid.org/0000-0002-4917-0938
Organisms can be exposed to sewage-derived contaminants via stormwater runoff when nonpotable reuse effluents are used for irrigation and when reverse osmosis (RO) concentrates from potable reuse systems are discharged. To characterize mitigation of ecotoxic potentials, we measured 11 pesticides and 6 pharmaceuticals in samples collected along 6 nonpotable and 5 potable reuse trains. While previous research focused on pharmaceuticals, our results indicated that the pesticides diuron, fipronil, and imidacloprid have high potential to cause ecological hazards. Anaerobic secondary effluents featured lower concentrations for most contaminants. The filtration and disinfection processes used in nonpotable reuse trains each reduced diuron, fipronil, imidacloprid, and metoprolol concentrations by <25%, although higher reductions were observed for sulfamethoxazole by media filtration (93%) and for clothianidin (80%) and diclofenac (65%) by disinfection. RO treatment in potable reuse trains rendered contaminants nondetectable in all cases except for one unusually high clothianidin concentration measured during one event, although subsequent advanced oxidation process (AOP) treatment removed the clothianidin. However, RO treatment produced concentrates with contaminant concentrations 4.4-fold higher than in secondary effluents. Ozonation/biological activated carbon (O3/BAC) filtration upstream of RO reduced contaminants in RO concentrates by >87% relative to secondary effluents for most contaminants except imidacloprid (∼20–40%).
Nonpotable reuse treatment processes reduced the concentrations of several of the measured pesticides and pharmaceuticals by <25%, while incorporation of ozone into reverse osmosis (RO)-based potable reuse treatment trains reduced ecotoxic hazard indices from RO concentrates.
Pesticide and Pharmaceutical Abatement within Nonpotable and Potable Reuse Treatment Trains
https://orcid.org/0000-0001-9082-7324
https://orcid.org/0000-0002-4917-0938
Organisms can be exposed to sewage-derived contaminants via stormwater runoff when nonpotable reuse effluents are used for irrigation and when reverse osmosis (RO) concentrates from potable reuse systems are discharged. To characterize mitigation of ecotoxic potentials, we measured 11 pesticides and 6 pharmaceuticals in samples collected along 6 nonpotable and 5 potable reuse trains. While previous research focused on pharmaceuticals, our results indicated that the pesticides diuron, fipronil, and imidacloprid have high potential to cause ecological hazards. Anaerobic secondary effluents featured lower concentrations for most contaminants. The filtration and disinfection processes used in nonpotable reuse trains each reduced diuron, fipronil, imidacloprid, and metoprolol concentrations by <25%, although higher reductions were observed for sulfamethoxazole by media filtration (93%) and for clothianidin (80%) and diclofenac (65%) by disinfection. RO treatment in potable reuse trains rendered contaminants nondetectable in all cases except for one unusually high clothianidin concentration measured during one event, although subsequent advanced oxidation process (AOP) treatment removed the clothianidin. However, RO treatment produced concentrates with contaminant concentrations 4.4-fold higher than in secondary effluents. Ozonation/biological activated carbon (O3/BAC) filtration upstream of RO reduced contaminants in RO concentrates by >87% relative to secondary effluents for most contaminants except imidacloprid (∼20–40%).
Nonpotable reuse treatment processes reduced the concentrations of several of the measured pesticides and pharmaceuticals by <25%, while incorporation of ozone into reverse osmosis (RO)-based potable reuse treatment trains reduced ecotoxic hazard indices from RO concentrates.
Pesticide and Pharmaceutical Abatement within Nonpotable and Potable Reuse Treatment Trains
https://orcid.org/0000-0001-9082-7324
https://orcid.org/0000-0002-4917-0938
Organisms can be exposed to sewage-derived contaminants via stormwater runoff when nonpotable reuse effluents are used for irrigation and when reverse osmosis (RO) concentrates from potable reuse systems are discharged. To characterize mitigation of ecotoxic potentials, we measured 11 pesticides and 6 pharmaceuticals in samples collected along 6 nonpotable and 5 potable reuse trains. While previous research focused on pharmaceuticals, our results indicated that the pesticides diuron, fipronil, and imidacloprid have high potential to cause ecological hazards. Anaerobic secondary effluents featured lower concentrations for most contaminants. The filtration and disinfection processes used in nonpotable reuse trains each reduced diuron, fipronil, imidacloprid, and metoprolol concentrations by <25%, although higher reductions were observed for sulfamethoxazole by media filtration (93%) and for clothianidin (80%) and diclofenac (65%) by disinfection. RO treatment in potable reuse trains rendered contaminants nondetectable in all cases except for one unusually high clothianidin concentration measured during one event, although subsequent advanced oxidation process (AOP) treatment removed the clothianidin. However, RO treatment produced concentrates with contaminant concentrations 4.4-fold higher than in secondary effluents. Ozonation/biological activated carbon (O3/BAC) filtration upstream of RO reduced contaminants in RO concentrates by >87% relative to secondary effluents for most contaminants except imidacloprid (∼20–40%).
Nonpotable reuse treatment processes reduced the concentrations of several of the measured pesticides and pharmaceuticals by <25%, while incorporation of ozone into reverse osmosis (RO)-based potable reuse treatment trains reduced ecotoxic hazard indices from RO concentrates.
Pesticide and Pharmaceutical Abatement within Nonpotable and Potable Reuse Treatment Trains
Lau, Stephanie S. (author) / Mitch, William A. (author)
ACS ES&T Water ; 4 ; 5531-5542
2024-12-13
Article (Journal)
Electronic Resource
English
Potable reuse treatment trains throughout the world
| Online Contents | 2013
Potable reuse treatment trains throughout the world
| British Library Online Contents | 2013
| American Chemical Society | 2023
Occurrence of Legionella in Nonpotable Reclaimed Water
| Wiley | 2018