Temperature and salinity jointly drive the toxicity of zinc oxide nanoparticles: A challenge to environmental risk assessment under global climate change

Lai，Racliffe Weng Seng1,2; Yung，Mana Man Na2; Zhou，Guang Jie1,2; He，Yan Ling3,4; Ng，Alan Man Ching3; Djurišić，Aleksandra B.4; Shih，Kaimin5; Leung，Kenneth Mei Yee1,2

2020-10-01

10.1039/d0en00467g

Environmental Science-Nano   影响因子和分区

2051-8153

2051-8161

The current hazard assessment of the emerging chemical contaminant, zinc oxide nanoparticles (ZnO-NPs), seldom considers the influence of environmental factors. However, under seasonal variation and global climate change, marine organisms are exposed to a changing environment with different regimes of temperature and salinity. This study, therefore, investigated the toxicity of ZnO-NPs, zinc oxide bulk-particles and zinc ions, to the marine copepod Tigriopus japonicus under the combined influence of temperature and salinity. The toxicity of ZnO-NPs generally increased with increasing temperature. At 15 °C, ZnO-NPs were less toxic because they generated fewer reactive oxygen species (ROS) and the copepods entered dormancy. At 35 °C, ZnO-NPs became more toxic because of their increased ROS production and potential physical impairments associated with the agglomerated particles, in addition to the thermal stress faced by the copepods. Their toxicity generally increased with decreasing salinity, due to their enhanced ion dissolution and osmotic pressure faced by the copepods at low salinity. Hence, ZnO-NPs were most toxic to the copepods at high temperature and low salinity, though temperature was a more influential factor than salinity. Based on the effect thresholds generated from the response surface model with consideration of the joint effect of temperature and salinity, the current marine water quality criteria may not provide adequate protection to marine organisms against ZnO-NPs. Our results provide new insights into the toxicity and modes of action of ZnO-NPs, and highlight the current deficiency of regulations under different regimes of temperature and salinity.

SCI ; EI

英语

其他

Research Grants Council of the Hong Kong Special Administrative Region Government via a General Research Fund[17305715] ; RGC via Theme-based Research Scheme[T21-711/16-R] ; RGC via Collaborative Research Fund[C7044-14G] ; Hong Kong Scholars Program[XJ2012050]

Chemistry ; Environmental Sciences & Ecology ; Science & Technology - Other Topics

Chemistry, Multidisciplinary ; Environmental Sciences ; Nanoscience & Nanotechnology

WOS:000579741600007

ROYAL SOC CHEMISTRY

20204409412811

Climate change ; Indicators (chemical) ; Marine biology ; Risk assessment ; Temperature ; Water quality ; II-VI semiconductors ; ZnO nanoparticles

Atmospheric Properties:443.1 ; Water Analysis:445.2 ; Health Care:461.7 ; Biology:461.9 ; Thermodynamics:641.1 ; Semiconducting Materials:712.1 ; Nanotechnology:761 ; Chemistry:801 ; Chemical Products Generally:804 ; Accidents and Accident Prevention:914.1

2-s2.0-85093928564

Scopus

1.State Key Laboratory of Marine Pollution,Department of Chemistry,City University of Hong Kong,Kowloon,Tat Chee Avenue,Hong Kong
2.Swire Institute of Marine Science,School of Biological Sciences,University of Hong Kong,Pokfulam,Hong Kong
3.Department of Physics,Southern University of Science and Technology,Shenzhen,China
4.Department of Physics,University of Hong Kong,Pokfulam,Hong Kong
5.Department of Civil Engineering,University of Hong Kong,Pokfulam,Hong Kong

Lai，Racliffe Weng Seng,Yung，Mana Man Na,Zhou，Guang Jie,et al. Temperature and salinity jointly drive the toxicity of zinc oxide nanoparticles: A challenge to environmental risk assessment under global climate change[J]. Environmental Science-Nano,2020,7(10):2995-3006.

Lai，Racliffe Weng Seng.,Yung，Mana Man Na.,Zhou，Guang Jie.,He，Yan Ling.,Ng，Alan Man Ching.,...&Leung，Kenneth Mei Yee.(2020).Temperature and salinity jointly drive the toxicity of zinc oxide nanoparticles: A challenge to environmental risk assessment under global climate change.Environmental Science-Nano,7(10),2995-3006.

Lai，Racliffe Weng Seng,et al."Temperature and salinity jointly drive the toxicity of zinc oxide nanoparticles: A challenge to environmental risk assessment under global climate change".Environmental Science-Nano 7.10(2020):2995-3006.