Human pharmaceuticals, antioxidants, and plasticizers in wastewater treatment plant and water reclamation plant effluents.
The primary objective of this study was to determine the presence of unregulated organic chemicals in reclaimed water using complementary targeted and broad spectrum approaches. Eleven of 12 targeted human pharmaceuticals, antioxidants, and plasticizers, and 27 tentatively identified non-target organic chemicals, were present in secondary effluent entering tertiary treatment trains at a wastewater treatment plant and two water reclamation facilities. The removal of these compounds by three different tertiary treatment trains was investigated: coagulant-assisted granular media filtration (California Title-22 water, 22 CCR 60301-60357; Barclay [2006]), lime clarification/reverse osmosis (lime/ RO), and microfiltration-reverse osmosis (MF/RO). Carbamazepine, clofibric acid, gemfibrozil, ibuprofen, p-toluenesulfonamide, caffeine, butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT), and N-butyl benzenesulfonamide (N-BBSA) were present at low to high nanogram-per-liter levels in Title 22 water. The lime/RO product waters contained lower concentrations of clofibric acid, ibuprofen, caffeine, BHA, and N-BBSA (<10 to 71 ng/L) than their Title 22 counterparts. The MF/RO treatment reduced concentrations to levels below their detection limits, although BHT was present in MF/RO product water from one facility. The presence of the target analytes in two surface waters used as raw drinking water sources and a recharged groundwater was also examined. Surface waters used as raw drinking water sources contained caffeine, BHA, BHT, and N-BBSA, while recharged groundwater contained BHT, BHA, and N-BBSA. Nontarget compounds in recharged groundwater appeared to be attenuated with increased residence time in the aquifer.
Soliman
Mary A
MA
Department of Environmental Health Sciences, University of California, Los Angeles, USA.
Pedersen
Joel A
JA
Park
Heesu
H
Castaneda-Jimenez
Angelica
A
Stenstrom
Michael K
MK
Suffet
I H Mel
IH
D000975:Antioxidants / Q000032:analysis; D017610:Calcium Compounds; D003247:Conservation of Natural Resources; D004203:Disinfection; D006801:Humans; D009995:Osmosis; D010087:Oxides; D004364:Pharmaceutical Preparations / Q000032:analysis; D010968:Plasticizers / Q000032:analysis; D014462:Ultrafiltration; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification / Q000379:methods*; D014881:Water Supply / Q000032:analysis*
D000975:Antioxidants; D017610:Calcium Compounds; D010087:Oxides; D004364:Pharmaceutical Preparations; D010968:Plasticizers; D014874:Water Pollutants, Chemical; C016538:lime