Organic contaminants of emerging concern in sediments and flatfish collected near outfalls discharging treated wastewater effluent to the Southern California Bight

2012 ◽  
Vol 31 (12) ◽  
pp. 2683-2688 ◽  
Author(s):  
Keith A. Maruya ◽  
Doris E. Vidal-Dorsch ◽  
Steven M. Bay ◽  
Jeong W. Kwon ◽  
Kang Xia ◽  
...  
Keyword(s):  
Organic Contaminants ◽  
Southern California ◽  
Wastewater Effluent ◽  
Southern California Bight ◽  
Treated Wastewater ◽  
Contaminants Of Emerging Concern

scholarly journals Influence of anthropogenic nutrient inputs on rates of coastal ocean nitrogen and carbon cycling in the Southern California Bight, United States

Elem Sci Anth ◽  
2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Karen McLaughlin ◽  
Meredith D. A. Howard ◽  
George Robertson ◽  
Carly D. A. Beck ◽  
Minna Ho ◽  
...  
Keyword(s):  
Primary Production ◽  
Chlorophyll A ◽  
Southern California ◽  
Regional Scale ◽  
Nitrogen Loading ◽  
Southern California Bight ◽  
Treated Wastewater ◽  
Nutrient Concentrations ◽  
Reference Area ◽  
Nutrient Inputs

Coastal nitrogen enrichment is a global environmental problem that can influence acidification, deoxygenation, and subsequent habitat loss in ways that can be synergistic with global climate change impacts. In the Southern California Bight, an eastern boundary upwelling system, modeling of wastewater discharged through ocean outfalls has shown that it effectively doubles nitrogen loading to urban coastal waters. However, effects of wastewater outfalls on rates of primary production and respiration, key processes through which coastal acidification and deoxygenation are manifested, have not been directly linked to observed trends in ambient chlorophyll a, oxygen, or pH. Here, we follow a “reference-area” approach and compare nutrient concentrations and rates of nitrification, primary production, and respiration observed in areas within treated wastewater effluent plumes to areas spatially distant from ocean outfalls where we expected minimal plume influence. We document that wastewater nutrient inputs had an immediate, local effect on nutrient stoichiometry, elevating ammonium and nitrite concentrations by 4 µM and 0.2 µM (on average), respectively, and increasing dissolved nitrogen-to-phosphorus ratios 7-fold within the plume. Chlorophyll a increased slightly by 1 µg L–1 in the upper 60 m of the water column (on average), and δ13C and δ15 N of suspended particulate matter, an integrated measure of primary production, increased by 1.3% and 1%, respectively (on average). Nitrification rates within the plume increased by 17 nmol L–1 day–1 (on average). We did not observe a significant near-plume effect on δ18O and δ15 N of dissolved nitrate + nitrite, an indicator of nitrogen assimilation into biomass, on rates of primary production and respiration or on dissolved oxygen concentration, suggesting that any potential impact from wastewater on these key features is moderated by other factors, notably water mass mixing. These results indicate that a “reference-area” approach may be insufficient to document regional-scale impacts of nutrients.

Evaluation of a recirculating hydroponic bed bioreactor for removal of contaminants of emerging concern from tertiary-treated wastewater effluent

Chemosphere ◽  
2021 ◽  
Vol 262 ◽  
pp. 128121
Author(s):  
Matthew S. Recsetar ◽  
Kevin M. Fitzsimmons ◽  
Joel L. Cuello ◽  
Christiane Hoppe-Jones ◽  
Shane A. Snyder
Keyword(s):  
Wastewater Effluent ◽  
Treated Wastewater ◽  
Contaminants Of Emerging Concern ◽  
Removal Of Contaminants

Municipal wastewater contamination in the southern california bight: Part I—metal and organic contaminants in sediments and organisms

1986 ◽  
Vol 18 (4) ◽  
pp. 291-310 ◽  
Author(s):  
David A Brown ◽  
Richard W Gossett ◽  
G Patrick Hershelman ◽  
Charles F Ward ◽  
Alvin M Westcott ◽  
...  
Keyword(s):  
Organic Contaminants ◽  
Southern California ◽  
Municipal Wastewater ◽  
Southern California Bight

Modeling of Habitat and Foraging Behavior of Beaked Whales in the Southern California Bight

2014 ◽  
Author(s):  
Simone Baumann-Pickering ◽  
John A. Hildebrand ◽  
Tina Yack ◽  
Jeffrey E. Moore
Keyword(s):  
Foraging Behavior ◽  
Southern California ◽  
Southern California Bight ◽  
Beaked Whales
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