Acute effects of CH3NH3PbI3 perovskite on Scenedesmus obliquus and Daphnia magana in aquatic environment
Acute effects of CH3NH3PbI3 perovskite on Scenedesmus obliquus and Daphnia magana in aquatic environment
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DOI：
10.1016/j.ecoenv.2020.111677
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发表时间：
2021-01-15
影响因子：
6.8
通讯作者：
Yu, Xuan
中科院分区：
文献类型：
--
作者：
Liu, Jun-Zhi;Yang, Jia-Shun;Yu, Xuan
CH3NH3PbI3是研究最广泛、最有希望大规模应用的光电转换材料之一。然而，一旦排放到水生环境中，就会释放出多种对水生生物致命的物质。本文使用斜生栅藻（典型的浮游植物）和大型溞（典型的浮游动物）这两种典型的水生污染指标来评估CH3NH3PbI3钙钛矿对水生生物的急性影响。结果表明，当CH3NH3PbI3钙钛矿初始水平（CPL）为40 mg·L-1或更高时，斜生斜生藻的生长受到显着抑制，叶绿素含量和蛋白质含量显着降低。当CPL超过5 mg L-1时，D. magna的生存将受到显着威胁。具体而言，计算出CH3NH3PbI3钙钛矿对斜纹蝽的72 h EC-50为37.21 mg L-1，该钙钛矿对大蝽成虫和新生儿的24 h LC-50分别计算为37.53 mg L-1和18.55 mg L-1。此外，两次急性实验均观察到溶液pH值显着下降和大量铅的生物富集，这可能是造成上述急性效应的主要原因。考虑到这些CH3NH3PbI3钙钛矿材料的强烈急性效应及其诱人的应用前景，应更加关注其对环境的危害。
CH3NH3PbI3 is one of the most widely studied and most promising photoelectric conversion materials for largescale application. However, once it is discharged into the aquatic environment, it will release a variety of lethal substances to the aquatic organisms. Herein, two typical aquatic pollution indicators, Scenedesmus obliquus (a typical phytoplankton) and Daphnia magna (a typical zooplankton), were used to assess the acute effects of CH3NH3PbI3 perovskite on aquatic organisms. The results showed that, when the initial CH3NH3PbI3 perovskite level (CPL) was 40 mg L-1 or higher, the growth of S. obliquus would be remarkably inhibited with significant decreases of chlorophyll content and protein content. And when the CPL was over 5 mg L-1, the survival of D. magna would be notably threatened. Specifically, the 72 h EC-50 of CH3NH3PbI3 perovskite to S. obliquus was calculated as 37.21 mg L-1, and the 24 h LC-50 of this perovskite to D. magna adults and neonates were calculated as 37.53 mg L-1 and 18.55 mg L-1, respectively. Moreover, remarkably solution pH declination and large amounts of lead bio-accumulation was observed in the both acute experiments, which could be the main reasons causing the above acute effects. Considering the strong acute effects of these CH3NH3PbI3 perovskite materials and their attractive application prospect, more attentions should be paid on their harmness to the environment.