Submarine groundwater discharge: A previously undocumented source of contaminants of emerging concern to the coastal ocean (Sydney, Australia)

MARINE POLLUTION BULLETIN

卷:160

Article

McKenzie, Tristan¹  Holloway, Ceylena²  Dulai, Henrietta¹  Tucker, James P.²  Sugimoto, Ryo³  Nakajima, Toshimi³  Harada, Kana³  Santos, Isaac R.^2,4 

[1] Univ Hawaii Manoa, Dept Earth Sci, Sch Ocean & Earth Sci & Technol, Honolulu, HI 96822 USA

[2] Southern Cross Univ, Natl Marine Sci Ctr, Sch Environm Sci & Engn, Coffs Harbour, NSW, Australia

[3] Fukui Prefectural Univ, Res Ctr Marine Bioresources, Fukui, Japan

[4] Univ Gothenburg, Dept Marine Sci, Gothenburg, Sweden

关键词: Submarine groundwater discharge;    Contaminants of emerging concern;    Pharmaceuticals;    Micropollutant;    Radium;    Risk assessment;   

DOI  :  10.1016/j.marpolbul.2020.111519

来源: Elsevier

【 摘 要 】

Submarine groundwater discharge (SGD) is rarely considered as a pathway for contaminants of emerging concern (CECs). Here, we investigated SGD as a source of CECs in Sydney Harbour, Australia. CEC detection frequencies based on presence/absence of a specific compound were > 90% for caffeine, carbamazepine, and dioxins, and overall ranged from 25 to 100% in five studied embayments. SGD rates estimated from radium isotopes explained > 80% of observed CEC inventories for one or more compounds (caffeine, carbamazepine, dioxins, sulfamethoxazole, fluoroquinolones and ibuprofen) in four out of the five embayments. Radium-derived residence times imply mixing is also an important process for driving coastal inventories of these persistent chemicals. Two compounds (ibuprofen and dioxins) were in concentrations deemed a high risk to the ecosystem. Overall, we demonstrate that SGD can act as a vector for CECs negatively impacting coastal water quality.

【 授权许可】

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