Submarine groundwater discharge: A previously undocumented source of contaminants of emerging concern to the coastal ocean (Sydney, Australia)
Submarine groundwater discharge: A previously undocumented source of contaminants of emerging concern to the coastal ocean (Sydney, Australia)
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海底地下水排放：以前未记录的污染物来源，引起了沿海海洋的新关注（澳大利亚悉尼）
DOI：
10.1016/j.marpolbul.2020.111519
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发表时间：
2020
影响因子：
5.8
通讯作者：
Santos Isaac R.
中科院分区：
文献类型：
--
作者：
McKenzie Trista;Holloway Ceylena;Dulai Henrietta;Tucker James P.;Sugimoto Ryo;Nakajima Toshimi;Harada Kana;Santos Isaac R.
海底地下水排放 (SGD) 很少被视为新兴关注污染物 (CEC) 的途径。在这里，我们调查了 SGD 作为澳大利亚悉尼港 CEC 的来源。对于咖啡因、卡马西平和二恶英，基于特定化合物是否存在的 CEC 检测频率 >90%，在五个研究的海湾中总体范围为 25% 至 100%。根据镭同位素估算的 SGD 率解释了五个海湾中有四个海湾中观察到的一种或多种化合物（咖啡因、卡马西平、二恶英、磺胺甲恶唑、氟喹诺酮类和布洛芬）CEC 库存的 80% 以上。镭产生的停留时间意味着混合也是推动这些持久性化学品沿海库存的一个重要过程。两种化合物（布洛芬和二恶英）的浓度被认为对生态系统构成高风险。总体而言，我们证明 SGD 可以作为 CEC 对沿海水质产生负面影响的载体。
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.