College of Geography and Environmental Science, Guizhou Normal University, Guiyang 550025, China; Cultivation Base of Guizhou State Key Laboratory of Karst Mountain Ecological Environment, Guiyang 550025, China.
College of Geography and Environmental Science, Guizhou Normal University, Guiyang 550025, China; Cultivation Base of Guizhou State Key Laboratory of Karst Mountain Ecological Environment, Guiyang 550025, China.
Aquat Toxicol. 2023 Apr;257:106442. doi: 10.1016/j.aquatox.2023.106442. Epub 2023 Feb 25.
With the discharge of nanoparticles (NPs) into the environment, NPs can interact with coexisting organic pollutants, resulting in combined toxic effects. In order to more realistically evaluate the potential toxic effects of NPs and coexisting pollutants on aquatic organisms. We evaluated the combined toxicities of TiO nanoparticles (TiO NPs) and three different organochlorines(OCs)-pentachlorobenzene (PeCB), 3,3',4,4'-tetrachlorobiphenyl (PCB-77) and atrazine to algae (Chlorella pyrenoidosa) in three karst natural waters. The results indicate that the individual toxicities of TiO NPs and OCs in natural waters were less than those of OECD medium, and the combined toxicities were different from but generally similar to those of OECD medium. The individual and combined toxicities were the largest in UW. The correlation analysis showed that the toxicities of TiO NPs and OCs were mainly related to TOC, ionic strength, Ca and Mg in natural water. The binary combined toxicities of PeCB and atrazine with TiO NPs to algae were synergistic. The binary combined toxicity of TiO NPs and PCB-77 to algae was antagonistic. The presence of TiO NPs increased the algae-accumulations of OCs. PeCB and atrazine all increased the algae-accumulations of TiO NPs, while PCB-77 showed the opposite result. The above results indicated that due to the influence of different hydrochemical properties in karst natural waters, there were differences between TiO NPs and OCs in their toxic effects, structural and functional damage, and bioaccumulation.
随着纳米颗粒（NPs）排放到环境中，它们可以与共存的有机污染物相互作用，导致联合毒性效应。为了更真实地评估 NPs 和共存污染物对水生生物的潜在毒性效应，我们评估了 TiO2 纳米颗粒（TiO2 NPs）和三种不同的有机氯农药（OCs）-五氯苯（PeCB）、3,3',4,4'-四氯联苯（PCB-77）和莠去津在三种喀斯特天然水中对藻类（栅藻）的联合毒性。结果表明，TiO2 NPs 和 OCs 在天然水中的个体毒性小于 OECD 介质中的毒性，联合毒性与 OECD 介质中的毒性不同，但通常相似。UW 中的个体和联合毒性最大。相关性分析表明，TiO2 NPs 和 OCs 的毒性主要与天然水中的 TOC、离子强度、Ca 和 Mg 有关。PeCB 和莠去津与 TiO2 NPs 对藻类的二元联合毒性具有协同作用，TiO2 NPs 和 PCB-77 对藻类的二元联合毒性具有拮抗作用。TiO2 NPs 的存在增加了 OCs 的藻类积累。PeCB 和莠去津均增加了 TiO2 NPs 的藻类积累，而 PCB-77 则表现出相反的结果。上述结果表明，由于喀斯特天然水中不同水化学性质的影响，TiO2 NPs 和 OCs 在毒性效应、结构和功能损伤以及生物积累方面存在差异。
