近几十年来沿海水产养殖业的迅速发展,导致向周围水域排放过多的有机物和营养物质,这可能导致富营养化并可能影响金属循环。在我们的研究中,研究了三个取自热带地区的沿海沉积物岩心中藻类有机质对金属积累的影响,海南岛,中国。总的来说,沿海水产养殖池塘附近的金属污染仍然很低,除了锌,Cd,东郊沉积物中锡富集到高度富集。δ13C值和原子C/N比表明浮游植物对东郊站点沉积有机质的主要贡献。此外,藻类来源的有机物和排放的氮都与富集的锌显著相关,Cd,还有Sn,这表明营养诱导的浮游植物生长及其有机物可能充当“生物泵”,以增强金属的积累。水产养殖池塘的废水处理应包括对藻类有机物的控制。
The rapid development of coastal aquaculture in recent decades has led to excessive discharge of organic matter and nutrients into surrounding waters, which could result in eutrophication and potentially affect metal cycling. In our study, the influence of algal organic matter on metal accumulation was examined in three coastal sediment cores taken from a tropical region, Hainan Island, China. Overall, metal pollution adjacent to aquaculture ponds remained at low levels on the coast, except Zn, Cd, and Sn were moderately to highly enriched in the Dongjiao sediments. The δ13C values and the atomic C/N ratios indicated a major contribution of phytoplankton to sedimentary organic matter at the Dongjiao site. Moreover, both the algae-derived organic matter and effluent nitrogen were significantly associated with the enriched Zn, Cd, and Sn, suggesting that nutrient-induced phytoplankton growth and its organic matter may act as a \"biological pump\" to enhance the accumulation of metals. Wastewater treatment for aquaculture ponds should include the control of algal organic matter.