藻类食物通过下调大型蚤（Daphnia magna）中的水过滤来减少赤铁矿纳米颗粒的吸收,Environmental Science & Technology

当前位置： X-MOL 学术 › Environ. Sci. Technol. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

藻类食物通过下调大型蚤（Daphnia magna）中的水过滤来减少赤铁矿纳米颗粒的吸收
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2019-06-19 , DOI: 10.1021/acs.est.9b01090
Yue-Yue Liu ₁ , Wen-Bo Guo ₁ , Ya-Tong Zhao ₁ , Shen Xu ₁ , Liu-Yan Yang ₁ , Ai-Jun Miao ₁

Affiliation

纳米技术的飞速发展导致大量纳米颗粒（NPs）释放到水生环境中，那里存在许多类型的生物颗粒，并可能与NPs相互作用。尽管如此，生物颗粒如何影响NP的生物积累和毒性仍是未知之数。在本研究中，我们研究了绿藻衣藻（Chlamydomonas reinhardtii）对大衣蚤（Daphnia magna）作为被测生物体对聚丙烯酸酯包被的赤铁矿NP（HemNPs）的累积动力学（吸收，同化，外排）和毒性的影响。作为一种生物颗粒和水蚤食品，莱茵衣藻减少了大麦蝇中HemNPs的积累和毒性。。HemNPs分散良好，几乎没有吸附到藻类上。因此，它们减少的积累可以部分地由它们从藻类到水蚤的低营养转移以及藻类对HemNP外排的诱导作用来解释。然而，主要的原因是HemNP摄取从水相中直接抑制作为还原水过滤活动的结果D.蚤中的存在莱茵衣藻。总体而言，在生物蓄积研究中，应注意生物颗粒对水相吸收NP的抑制作用。

"点击查看英文标题和摘要"

Algal Foods Reduce the Uptake of Hematite Nanoparticles by Downregulating Water Filtration in Daphnia magna

Rapid developments in nanotechnology have led to the release of substantial amounts of nanoparticles (NPs) into aquatic environments, where many types of biotic particles are present and could potentially interact with the NPs. Nevertheless, how biotic particles may affect the bioaccumulation and toxicity of NPs remains largely unknown. In the present study, we investigated the effects of the green alga Chlamydomonas reinhardtii on the accumulation kinetics (uptake, assimilation, efflux) and toxicity of polyacrylate-coated hematite NPs (HemNPs), using Daphnia magna as the test organism. As a biotic particle and daphnid food, C. reinhardtii reduced the accumulation and toxicity of HemNPs in D. magna. The HemNPs were well-dispersed with little adsorption to the alga. Their decreased accumulation could thus be partly explained by their low trophic transfer from the alga to the daphnid and by the inductive effects of the alga on HemNP efflux. However, the main cause was the direct inhibition of HemNP uptake from the water phase as a result of the reduced water-filtration activity of D. magna in the presence of C. reinhardtii. Overall, in bioaccumulation studies, the inhibitory effects of biotic particles on NP uptake from the water phase should be paid attention.

更新日期：2019-06-20

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南