Spotlights are papers selected by editors published in peer‐reviewed journals that may be more regionally specific or appearing in languages other than English
Spotlights are papers selected by editors published in peer‐reviewed journals that may be more regionally specific or appearing in languages other than English
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焦点论文是由编辑选出的发表在同行评审期刊上的论文，这些论文可能更具区域性或以英语以外的语言出现
DOI：
10.1002/etc.4641
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发表时间：
2020
影响因子：
4.1
通讯作者：
J. Lascelles
中科院分区：
文献类型：
--
作者：
M. McIllmurray;J. Lascelles
聚苯乙烯微塑料和重金属对丰年虾（单性生殖卤虫）的综合毒性微塑料由于其稳定和不可降解的特性，对海洋生态系统具有潜在危害。微塑料由于粒径小、比表面积大，很容易吸收海洋中的重金属和其他污染物，从而带来额外的生态风险（图1）。因此，研究微塑料与重金属的混合物毒性对其生态风险评估具有重要意义。研究了 10 μm 聚苯乙烯、Cu 和 Cd 的单独和混合物对无节幼体丰年虾孤雌生殖卤虫的急性毒性。采用电感耦合等离子体质谱法测定无节幼体中Cu和Cd的浓度，探讨聚苯乙烯颗粒的存在对无节幼体中重金属积累的影响。结果表明，Cu和Cd的24小时半数致死浓度（LC50）分别为（1.26±0.15）mg·L和（164.5±27.3）mg·L。相比之下，Cu和Cd与聚苯乙烯结合的24 h-LC50分别为（1.38±0.23）mg·L和（178.3±36.4）mg·L。此外，无节幼体中重金属浓度随时间的变化表明，聚苯乙烯微球的存在显着促进了单性生殖无节幼体对 Cu 和 Cd 的吸收和排泄率。然而，与不存在微塑料相比，这种促进并没有影响铜和镉的急性毒性。研究结果可为海洋环境中微塑料和重金属的生态风险评估提供理论依据。
Combined Toxicity of Polystyrene Microplastics and Heavy Metals to Brine Shrimp (Artemia parthenogenetica) Microplastics are potentially harmful to the marine ecosystem because of their stable and non‐degradable properties. Microplastics can easily absorb heavy metals and other pollutants in the ocean due to their small particle size and large specific surface area, which would result in additional ecological risks (Figure 1). Therefore, it is of great significance to study the mixture toxicity of microplastics and heavy metals for their ecological risk assessment. The individual and mixture acute toxicities of 10 μm polystyrene, Cu, and Cd on nauplii brine shrimp, Artemia parthenogenetica, were investigated. The concentrations of Cu and Cd in nauplii were measured by inductively coupled plasma mass spectrometry, and then the effects of the presence of polystyrene particles on the accumulation of heavy metals in nauplii were explored. The results showed that the 24‐h median lethal concentration (LC50) of Cu and Cd were (1.26± 0.15) mg · L and (164.5± 27.3) mg · L, respectively. In contrast, the 24 h‐LC50 of Cu and Cd combined with polystyrene were (1.38± 0.23) mg · L and (178.3± 36.4) mg · L, respectively. Furthermore, the time‐dependent concentrations of heavy metals in nauplii showed that the presence of polystyrene microspheres significantly promoted the uptake and excretion rates of Cu and Cd by nauplii of A. parthenogenetica. However, this promotion did not affect the acute toxicities of Cu and Cd compared with the absence of microplastics. The results could provide a theoretical basis for ecological risk assessment of microplastics and heavy metals in the marine environment.