Department of Oceanography, Faculty of Earth Systems and Environmental Sciences, Chonnam National University, Gwangju 61186, Republic of Korea.
Department of Environmental Engineering, Kyung Hee University, Suwon 17104, Republic of Korea.
Mar Pollut Bull. 2022 Dec;185(Pt A):114280. doi: 10.1016/j.marpolbul.2022.114280. Epub 2022 Nov 1.
The spatiotemporal distributions of nutrients in coastal waters surrounding eight wastewater treatment plants (WWTPs) in four seasons were investigated to determine the effects of WWTP effluents on seawater off Jeju Island, Korea. The highest concentrations of nutrients were observed in the outlets of WWTPs with relatively high ammonium concentrations among dissolved inorganic nitrogen (DIN). The reduced DIN (NO and NH)/total DIN ratios are used as a potential short-term index for marine environmental conditions. In seawater surrounding the WWTPs, relatively low nutrient concentrations were observed in spring and fall, due to enhanced biological production, which is closely linked to decreased N/P ratios. Because the highest WWTP effluent fluxes of ammonium in this study were similar to the fluxes of nutrients from submarine groundwater discharge, diffusion from bottom sediments, and discharge from land-based fish farm wastewater, WWTP effluent-derived nutrients are potentially important in oligotrophic environments and can be readily utilized by phytoplankton.
本研究调查了韩国济州岛周边八个污水处理厂（WWTP）四季海水中营养物质的时空分布，以确定 WWTP 污水对海水的影响。在溶解无机氮（DIN）中，具有相对较高氨浓度的 WWTP 出口处观察到最高浓度的营养物质。降低的 DIN（NO 和 NH）/总 DIN 比值可用作海洋环境条件的潜在短期指标。在 WWTP 周围的海水中，由于生物生产力增强，春季和秋季观察到相对较低的营养浓度，这与 N/P 比值降低密切相关。由于本研究中 WWTP 中铵的最高污水通量与海底地下水排放、底泥扩散和陆基养殖场污水排放的通量相似，因此 WWTP 污水衍生的营养物质在贫营养环境中可能很重要，并且很容易被浮游植物利用。
