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Li X, Chen CC, Wu L, Zhou J, Huang Y, Zhu X. Neglected negative effect of carbon quantum dots (CQDs) entering the ocean on marine organisms living in different water layers. MARINE POLLUTION BULLETIN 2024; 199:115921. [PMID: 38150977 DOI: 10.1016/j.marpolbul.2023.115921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 12/06/2023] [Accepted: 12/10/2023] [Indexed: 12/29/2023]
Abstract
Carbon quantum dots (CQDs) are well dispersed in water, but their potential risks in the marine environment have not been described. This study characterized CQDs and investigated their biological effects (including growth, photosynthesis and behavioural changes) in three marine organisms living in different water layers (the surface phytoplankton Phaeodactylum tricornutum and zooplankton Artemia salina and the benthic coral Zoanthus sp. at the bottom). The results showed that over 78 % of CQDs were suspended in seawater after 96 h. The biomass and photosynthesis of P. tricornutum were significantly affected, with a maximum reduction of 89.49 % in algal cells. CQDs accumulated in the intestinal tract of A. salina, reducing grazing and filtration rates by up to 71.88 % and 89.46 %, respectively. In contrast, CQD exposure had irreversible effects on the tentacle expansion behaviour of Zoanthus sp. This study helps clarify the environmental effects and ecological risks associated with the release of CQDs into the ocean.
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Affiliation(s)
- Xinyang Li
- Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, PR China
| | - Ciara Chun Chen
- College of Chemistry and Chemical Engineering, Shantou University, Shantou 515063, PR China
| | - Lin Wu
- Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, PR China
| | - Jin Zhou
- Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, PR China
| | - Yuxiong Huang
- Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, PR China.
| | - Xiaoshan Zhu
- Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, PR China; College of Ecology and Environment, Hainan University, Haikou 570228, PR China.
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Liang J, Fan T, Lü JT, Guan T, Deng TT, Xiong B. Dual-mode luminescence anti-counterfeiting and white light emission of NaGdF 4:Ce,Eu,Tb/carbon dot hydrophilic nanocomposite ink. RSC Adv 2023; 13:25681-25690. [PMID: 37649662 PMCID: PMC10463238 DOI: 10.1039/d3ra04368a] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 08/05/2023] [Indexed: 09/01/2023] Open
Abstract
NaGdF4:Ce,Eu,Tb nanocrystals were successfully prepared by a one-step hydrothermal method with Ce3+ ions as sensitizers, Eu3+ and Tb3+ ions as activators, and polyethylenimine (PEI) as surfactants. Color-adjustable fluorescence emission was achieved by the energy transfer effect between rare earth ions. Blue fluorescent carbon quantum dots (CDs) with a double UV response under 254 nm and 365 nm excitation were synthesized by a one-step hydrothermal method. A hydrophilic NaGdF4:Ce,Eu,Tb/CD composite ink was prepared by an easy physical mixing method. Because of the electrostatic self-assembly effect, the color adjustable luminescence was achieved in a few seconds, and the white light emission with color coordinates of (0.32, 0.32) was obtained. A dual-mode luminescence anti-counterfeiting pattern was designed and achieved by excitation with ultraviolet light at 254 nm and 365 nm.
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Affiliation(s)
- Jie Liang
- School of Materials Science and Hydrogen Energy, Foshan University Foshan 528000 China
- Guangdong Key Laboratory for Hydrogen Energy Technologies Foshan 528000 China
- Foshan Inorganic Micro-Nano Luminescent Materials Engineering Technology Research Center Foshan 528000 China
| | - Ting Fan
- School of Materials Science and Hydrogen Energy, Foshan University Foshan 528000 China
- Guangdong Key Laboratory for Hydrogen Energy Technologies Foshan 528000 China
- Foshan Inorganic Micro-Nano Luminescent Materials Engineering Technology Research Center Foshan 528000 China
| | - Jian-Tao Lü
- School of Physics and Optoelectronic Engineering, Foshan University Foshan 528200 China
| | - Tianjie Guan
- School of Materials Science and Hydrogen Energy, Foshan University Foshan 528000 China
- Guangdong Key Laboratory for Hydrogen Energy Technologies Foshan 528000 China
- Foshan Inorganic Micro-Nano Luminescent Materials Engineering Technology Research Center Foshan 528000 China
| | - Ting-Ting Deng
- School of Physics and Optoelectronic Engineering, Foshan University Foshan 528200 China
| | - Bangyun Xiong
- School of Materials Science and Hydrogen Energy, Foshan University Foshan 528000 China
- Guangdong Key Laboratory for Hydrogen Energy Technologies Foshan 528000 China
- Foshan Inorganic Micro-Nano Luminescent Materials Engineering Technology Research Center Foshan 528000 China
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Liang L, Wong SC, Lisak G. Effects of plastic-derived carbon dots on germination and growth of pea (Pisum sativum) via seed nano-priming. CHEMOSPHERE 2023; 316:137868. [PMID: 36642132 DOI: 10.1016/j.chemosphere.2023.137868] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Revised: 01/11/2023] [Accepted: 01/12/2023] [Indexed: 06/17/2023]
Abstract
Seed nano-priming is a promising technology employed in the agronomic field to promote seed germination and plant growth. However, the effects of carbon dots (CDs) on plant development via seed nano-priming remain unclear. In the present study, CDs synthesized from non-biodegradable plastic wastes were adopted as a nano-priming agent for pea (Pisum sativum) seed treatment. The results demonstrated positive effects of seed priming at all CD concentrations (0.25-2 mg/mL), including accelerated seed germination rate, increased shoot and root elongation, biomass accumulation, and root moisture level compared to the control groups. Surface erosion of seed coat was observed after CD priming, which effectively promoted seed imbibition capability. CD penetration, internalization, and translocation were confirmed using transmission electron microscopy. Furthermore, the CD-plant interaction significantly enhanced seed antioxidant enzyme activity, as well as augmented root vigor, chlorophyll content, and carbohydrate content. These findings exhibit great potential of waste-derived CDs as nano-priming agents for seed germination and seedling development in a cost-effective and sustainable manner.
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Affiliation(s)
- Lili Liang
- School of Civil and Environmental Engineering, Nanyang Technological University, Singapore, 639798, Singapore; Residues and Resource Reclamation Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, CleanTech One, Singapore, 637141, Singapore; Interdisciplinary Graduate Program, Nanyang Technological University, 61 Nanyang Drive, Singapore, 637335, Singapore
| | - Siew Cheong Wong
- Residues and Resource Reclamation Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, CleanTech One, Singapore, 637141, Singapore
| | - Grzegorz Lisak
- School of Civil and Environmental Engineering, Nanyang Technological University, Singapore, 639798, Singapore; Residues and Resource Reclamation Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, CleanTech One, Singapore, 637141, Singapore.
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Ünlü C, Budak E, Kestir SM. Altering natural photosynthesis through quantum dots: effect of quantum dots on viability, light harvesting capacity and growth of photosynthetic organisms. FUNCTIONAL PLANT BIOLOGY : FPB 2022; 49:444-451. [PMID: 35184797 DOI: 10.1071/fp21136] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 01/28/2022] [Indexed: 06/14/2023]
Abstract
Quantum dots are versatile fluorescent semiconductor nanocrystals with unique photophysical properties. They have been used in various research fields of biotechnology effectively for almost three decades including cell imaging, protein tracking, energy transfer, etc. With their great potential as energy donors or acceptors, quantum dots have also been used in many studies about altering growth rate and photosynthetic activity of photosynthetic organisms by manipulating their light harvesting capacity. In this review, effect of quantum dots on growth rate of photosynthetic organisms and light harvesting capacity of photosynthetic organisms were discussed in details together with toxic effects of cadmium-based and carbon-based quantum dots on photosynthetic organisms. In short, as one of the promising materials of nanotechnology, quantum dots have become one of the essential research topics in photosynthesis research area and will help researchers to manipulate natural photosynthesis in future.
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Affiliation(s)
- Caner Ünlü
- Istanbul Technical University, Department of Nanoscience and Nanoengineering, Maslak, 34469 Istanbul, Turkey; and Istanbul Technical University, Faculty of Science and Letters, Department of Chemistry, Maslak, 34469 Istanbul, Turkey; and Istanbul Technical University Nanotechnology Research and Application Centre (ITUNano), Istanbul, Turkey
| | - Esranur Budak
- Istanbul Technical University, Department of Nanoscience and Nanoengineering, Maslak, 34469 Istanbul, Turkey
| | - Sacide Melek Kestir
- Istanbul Technical University, Department of Nanoscience and Nanoengineering, Maslak, 34469 Istanbul, Turkey
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Yao K, Lv X, Zheng G, Chen Z, Jiang Y, Zhu X, Wang Z, Cai Z. Effects of Carbon Quantum Dots on Aquatic Environments: Comparison of Toxicity to Organisms at Different Trophic Levels. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:14445-14451. [PMID: 30486644 DOI: 10.1021/acs.est.8b04235] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Carbon quantum dots (CQDs) have high hydrophilicity, high cell permeability, and are frequently used in water-based and biorelated applications, yet studies concerning the ecological risks of CQDs in aquatic environments are largely insufficient. In the present study, the toxicity of CQDs to zebrafish ( Danio rerio), zooplankton ( Daphnia magna), and phytoplankton ( Scenedesmus obliquus) were assessed for the first time. The results indicated that CQDs (up to 200 mg/L) could be depurated by D. rerio with negligible toxicity. In comparison, CQDs induced mortality and immobility in D. magna with a 48-h EC50 value and LC50 value of 97.5 and 160.3 mg/L, respectively. In S. obliquus, CQDs inhibited photosynthesis and nutrition absorption in a dose- and time-dependent manner, and the growth of algae was also inhibited with a 96-h EC50 value of 74.8 mg/L, suggesting that S. obliquus, the lowest trophic level in this study, was most sensitive to CQDs exposure. Further investigations revealed that CQDs induced an increase in oxidative stress in algae cells and a decrease in pH value of an algae medium, indicating that oxidative stress and water acidification may be the mechanisms underlying the toxicity of CQDs to S. obliquus.
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Affiliation(s)
- Kun Yao
- School of Environmental Science and Engineering , Guangdong University of Technology , Guangzhou 510000 , P.R. China
- Graduate School at Shenzhen , Tsinghua University , Shenzhen 518055 , P.R. China
| | - Xiaohui Lv
- Graduate School at Shenzhen , Tsinghua University , Shenzhen 518055 , P.R. China
| | - Guangqiang Zheng
- School of Environmental Science and Engineering , Guangdong University of Technology , Guangzhou 510000 , P.R. China
- Graduate School at Shenzhen , Tsinghua University , Shenzhen 518055 , P.R. China
| | - Zuohong Chen
- Graduate School at Shenzhen , Tsinghua University , Shenzhen 518055 , P.R. China
| | - Yuelu Jiang
- Graduate School at Shenzhen , Tsinghua University , Shenzhen 518055 , P.R. China
| | - Xiaoshan Zhu
- Graduate School at Shenzhen , Tsinghua University , Shenzhen 518055 , P.R. China
| | - Zhenyu Wang
- College of Environmental Science and Engineering and Qingdao Collaborative Innovation Center of Marine Science and Technology , Ocean University of China , Qingdao 266100 , China
- Institute of Environmental Processes and Pollution Control and the School of Environmental and Civil Engineering , Jiangnan University , Wuxi 214122 , China
| | - Zhonghua Cai
- Graduate School at Shenzhen , Tsinghua University , Shenzhen 518055 , P.R. China
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Xiao A, Wang C, Chen J, Guo R, Yan Z, Chen J. Carbon and Metal Quantum Dots toxicity on the microalgae Chlorella pyrenoidosa. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2016; 133:211-7. [PMID: 27467021 DOI: 10.1016/j.ecoenv.2016.07.026] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2016] [Revised: 07/13/2016] [Accepted: 07/20/2016] [Indexed: 05/07/2023]
Abstract
In this report, we investigated the cytotoxicity of two types of quantum dots(QDs) (carbon quantum dots(CQDs): N, S doped CQDs, N doped CQDs, no doped CQDs; metal QDs(MQDs): CdTe QDs, CdS QDs, CuInS2/ZnS QDs) on Chlorella pyrenoidosa(C. Pyrenoidosa) at different concentrations. We compared the toxicity of different QDs on C. Pyrenoidosa through determination of the algal growth inhibition, acute toxicity tests (EC50), Chlorophyll a(Chla) contents, protein contents, the activity of enzymatic and metabolites contents. When C. Pyrenoidosa was treated by various concentrations of QDs, the Chla contents were consistent to the number of algae cells, showing a good dose-response relationship. At the 96h, the EC50 of N, S doped CQDs, N doped CQDs, no doped CQDs and CdTe QDs, CdS QDs, CuInS2/ZnS QDs were 38.56, 185.83, 232.47, 0.015, 4.88, 459.5mg/l, respectively. The toxicity order of them was: CuInS2/ZnS QDs<no doped CQDs<N doped CQDs<N,S doped CQDs<CdS QDs<CdTe QDs. The activity of antioxidant enzymatic superoxide dismutase (SOD) was enhanced and the non-enzymatic antioxidant glutathion (GSH) level was decreased with the increasing of QDs concentration, respectively. The accumulation of Malondialdehyde (MDA), a product of lipid peroxidation caused by reactive oxygen species(ROS), was enhanced when algae were exposed to QDs. In conclusion, the toxicity of CQDs was smaller than MQDs, but the toxicity of CuInS2/ZnS QDs was the smallest.
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Affiliation(s)
- An Xiao
- School of Science, China Pharmaceutical University, Nanjing 210009, China; School of Science, Nanjing University of Science and Technology, Nanjing 211000, China
| | - Chao Wang
- School of Life Science and Technology, China Pharmaceutical University, Nanjing 210009, China
| | - Jiao Chen
- School of Science, China Pharmaceutical University, Nanjing 210009, China
| | - Ruixin Guo
- School of Science, China Pharmaceutical University, Nanjing 210009, China
| | - Zhengyu Yan
- School of Science, China Pharmaceutical University, Nanjing 210009, China.
| | - Jianqiu Chen
- School of Science, China Pharmaceutical University, Nanjing 210009, China.
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