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Wang W, Zhu S, Li N, Xie S, Wen C, Luo X. Enhanced Cd 2+ adsorption and toxicity for microbial biofilms in the presence of TiO 2 nanoparticles. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 314:120239. [PMID: 36152717 DOI: 10.1016/j.envpol.2022.120239] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 09/03/2022] [Accepted: 09/18/2022] [Indexed: 06/16/2023]
Abstract
Titanium dioxide nanoparticles (TiO2 NPs) easily combine with other pollutants such as heavy metals because of their excellent physiochemical properties. However, how such an interaction may affect the binding behavior of metals onto biofilms remains largely unclear. This study, examined the effects of TiO2 NPs on Cd2+ accumulation and toxicity for natural periphytic biofilms were examined. The adsorption kinetics showed that adding 0.1 and 1 mg/L TiO2-NPs increased the Cd2+ adsorption of biofilms at equilibrium by 23.5% and 35.8%, respectively. However, adding 10 mg/L TiO2 NPs increased the Cd2+ adsorption of biofilms at equilibrium by only 1.9%. The adsorption isotherms indicate that the presence of TiO2 NPs considerably increased the Cd2+ adsorption capacity of the biofilms; however, this effect became less prominent at high TiO2 NP concentrations. The optimum pH for Cd2+ adsorption increased with increasing Cd2+ and TiO2 NP contents. At low concentrations, the coexistence of Cd2+ and TiO2 NPs may facilitate their respective accumulation by stimulating the secretion of extracellular polymeric substances and enhancing the microbial activity of the biofilm. The presence of TiO2 NPs increases the surface binding energy between Cd2+ and functional groups such as carboxyl groups, enhancing the Cd2+ accumulation on the biofilm.
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Affiliation(s)
- Wenwen Wang
- Institute of International Rivers and Eco-Security, Yunnan University, Kunming, 650500, China; Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security, Kunming, 650500, China
| | - Shijun Zhu
- Institute of International Rivers and Eco-Security, Yunnan University, Kunming, 650500, China; Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security, Kunming, 650500, China
| | - Nihong Li
- Institute of International Rivers and Eco-Security, Yunnan University, Kunming, 650500, China; Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security, Kunming, 650500, China
| | - Shanshan Xie
- Institute of International Rivers and Eco-Security, Yunnan University, Kunming, 650500, China; Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security, Kunming, 650500, China
| | - Chen Wen
- Institute of International Rivers and Eco-Security, Yunnan University, Kunming, 650500, China; Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security, Kunming, 650500, China
| | - Xia Luo
- Institute of International Rivers and Eco-Security, Yunnan University, Kunming, 650500, China; Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security, Kunming, 650500, China.
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Li M, Slaveykova VI. Dual role of titanium dioxide nanoparticles in the accumulation of inorganic and methyl mercury by crustacean Daphnia magna through waterborne and dietary exposure. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 295:118619. [PMID: 34915094 DOI: 10.1016/j.envpol.2021.118619] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 11/20/2021] [Accepted: 12/01/2021] [Indexed: 06/14/2023]
Abstract
Titanium dioxide nanoparticles (nTiO2) are widely used in numerous products, yet their role in the accumulation and transfer of other contaminants in the aquatic food webs is not well understood. The influence of nTiO2 on inorganic (IHg) and monomethyl mercury (MeHg) accumulation in invertebrate Daphnia magna through waterborne and dietary exposure was thus thoroughly investigated. The results showed that nTiO2 led to a substantial decrease of the total mercury body burden (THg) in D. magna in direct waterborne exposure to IHg/MeHg. However, exposure to nTiO2 pre-treated with IHg/MeHg resulted in an increase of the THg body burden in daphnids. The presence of nTiO2 led to a substantial decrease of the THg in D. magna when exposed to IHg/MeHg via algal food. These effects were more pronounced for IHg than that for MeHg due to the higher adsorption capabilities of nTiO2 for IHg. In addition, high concentrations of nTiO2 favored the trophic transfer of IHg/MeHg through feeding on nTiO2 pre-treated with Hg, however lessened it when D. magna were fed on alga pre-treated with IHg/MeHg. Comparable assimilation efficiency (AE), determined as Hg retained in daphnids after depuration, was observed in D. magna when exposed to IHg/MeHg via algal food regardless the absence or presence of 20 mgL-1 nTiO2. By contrast, an increase of the AE of MeHg through feeding on nTiO2 and alga was found in the presence of higher concentration of 200 mgL-1 nTiO2. The present results will help to better understand the role of nTiO2 on bioavailability and trophic transfer of global contaminants, such as mercury, known to bioaccumulate and biomagnify in the aquatic environment.
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Affiliation(s)
- Mengting Li
- Environmental Biogeochemistry and Ecotoxicology, Department F.-A. Forel for Environmental and Aquatic Sciences, School of Earth and Environmental Sciences, Faculty of Science, University of Geneva, Uni Carl Vogt, 66, boulevard Carl-Vogt, CH-1211, Genève 4, Switzerland
| | - Vera I Slaveykova
- Environmental Biogeochemistry and Ecotoxicology, Department F.-A. Forel for Environmental and Aquatic Sciences, School of Earth and Environmental Sciences, Faculty of Science, University of Geneva, Uni Carl Vogt, 66, boulevard Carl-Vogt, CH-1211, Genève 4, Switzerland.
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Abd-Elhakim YM, Hashem MM, Abo-EL-Sooud K, Hassan BA, Elbohi KM, Al-Sagheer AA. Effects of Co-Exposure of Nanoparticles and Metals on Different Organisms: A Review. TOXICS 2021; 9:284. [PMID: 34822675 PMCID: PMC8623643 DOI: 10.3390/toxics9110284] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 10/18/2021] [Accepted: 10/22/2021] [Indexed: 11/24/2022]
Abstract
Wide nanotechnology applications and the commercialization of consumer products containing engineered nanomaterials (ENMs) have increased the release of nanoparticles (NPs) to the environment. Titanium dioxide, aluminum oxide, zinc oxide, and silica NPs are widely implicated NPs in industrial, medicinal, and food products. Different types of pollutants usually co-exist in the environment. Heavy metals (HMs) are widely distributed pollutants that could potentially co-occur with NPs in the environment. Similar to what occurs with NPs, HMs accumulation in the environment results from anthropogenic activities, in addition to some natural sources. These pollutants remain in the environment for long periods and have an impact on several organisms through different routes of exposure in soil, water, and air. The impact on complex systems results from the interactions between NPs and HMs and the organisms. This review describes the outcomes of simultaneous exposure to the most commonly found ENMs and HMs, particularly on soil and aquatic organisms.
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Affiliation(s)
- Yasmina M. Abd-Elhakim
- Department of Forensic Medicine and Toxicology, Faculty of Veterinary Medicine, Zagazig University, Zagazig 44511, Egypt;
| | - Mohamed M. Hashem
- Department of Pharmacology, Faculty of Veterinary Medicine, Cairo University, Giza 12211, Egypt; (M.M.H.); (K.A.-E.-S.)
| | - Khaled Abo-EL-Sooud
- Department of Pharmacology, Faculty of Veterinary Medicine, Cairo University, Giza 12211, Egypt; (M.M.H.); (K.A.-E.-S.)
| | - Bayan A. Hassan
- Pharmacology Department, Faculty of Pharmacy, Future University, Cairo 41639, Egypt;
| | - Khlood M. Elbohi
- Department of Forensic Medicine and Toxicology, Faculty of Veterinary Medicine, Zagazig University, Zagazig 44511, Egypt;
| | - Adham A. Al-Sagheer
- Department of Animal Production, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt
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Wang P, Zhao L, Huang Y, Qian W, Zhu X, Wang Z, Cai Z. Combined toxicity of nano-TiO 2 and Cd 2+ to Scenedesmus obliquus: Effects at different concentration ratios. JOURNAL OF HAZARDOUS MATERIALS 2021; 418:126354. [PMID: 34130160 DOI: 10.1016/j.jhazmat.2021.126354] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Revised: 05/28/2021] [Accepted: 06/06/2021] [Indexed: 06/12/2023]
Abstract
The continuous release of manufactured nanomaterials (MNMs) to environments raised concerns on their combined toxicological risks with co-existing contaminants, since MNMs might severely alter the environmental behavior and fate of the contaminants. In this study, the combined toxicity of nano-sized titanium dioxide (nTiO2) and cadmium (Cd2+) to the green alga Scenedesmus obliquus and the underlying physicochemical mechanisms were investigated for the first time at different concentration ratios of Cd2+ to nTiO2 to closely mimic the realistic environment scenarios where the concentration ratios of nTiO2 to other contaminants are constantly changing. Our results suggested that under the co-exposure to different concentration ratios of Cd2+ to nTiO2, the co-exposure contaminants exhibited three different combined toxicity modes (antagonistic, partially additive, and synergistic). Specifically, antagonistic combined toxicity was observed under co-exposure to a low concentration ratio of nTiO2 to Cd2+ as the absorption by nTiO2 decreased the bioavailability of Cd2+. However, the partially additive and synergistic combined toxicity occurred when the proportion of nTiO2 in the co-exposure system was relatively high, which would mechanically and/or oxidatively damage the alga cell structures. Even worse, as a carrier of Cd2+, nTiO2 enhanced the amount of Cd2+ entering cells, which significantly enhanced the toxicity of Cd2+ to algae. Overall, we demonstrated that concentration ratios of nTiO2 to Cd2+ play an important role in determining the combined toxicity mode, which would provide a novel reference to environmental and health risk assessment of co-exposure to conventional pollutants and MNMs.
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Affiliation(s)
- Pu Wang
- Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Lihong Zhao
- Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Yuxiong Huang
- Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Wei Qian
- Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Xiaoshan Zhu
- Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; Southern Laboratory of Ocean Science and Engineering (Guangdong, Zhuhai), Zhuhai 519000, China.
| | - Zhenyu Wang
- Institute of Environmental Processes and Pollution Control, School of Environmental and Civil Engineering, Jiangnan University, Wuxi 2141122, China
| | - Zhonghua Cai
- Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
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Trinh TX, Kim J. Status Quo in Data Availability and Predictive Models of Nano-Mixture Toxicity. NANOMATERIALS 2021; 11:nano11010124. [PMID: 33430414 PMCID: PMC7826902 DOI: 10.3390/nano11010124] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 12/29/2020] [Accepted: 01/04/2021] [Indexed: 11/16/2022]
Abstract
Co-exposure of nanomaterials and chemicals can cause mixture toxicity effects to living organisms. Predictive models might help to reduce the intensive laboratory experiments required for determining the toxicity of the mixtures. Previously, concentration addition (CA), independent action (IA), and quantitative structure–activity relationship (QSAR)-based models were successfully applied to mixtures of organic chemicals. However, there were few studies concerning predictive models for toxicity of nano-mixtures before June 2020. Previous reviews provided comprehensive knowledge of computational models and mechanisms for chemical mixture toxicity. There is a gap in the reviewing of datasets and predictive models, which might cause obstacles in the toxicity assessment of nano-mixtures by using in silico approach. In this review, we collected 183 studies of nano-mixture toxicity and curated data to investigate the current data and model availability and gap and to derive research challenges to facilitate further experimental studies for data gap filling and the development of predictive models.
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Affiliation(s)
- Tung X. Trinh
- Chemical Safety Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Korea;
- Department of Chemistry, College of Natural Sciences, Hanyang University, Seoul 04763, Korea
| | - Jongwoon Kim
- Chemical Safety Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Korea;
- Correspondence: ; Tel.: +82-(0)42-860-7482
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Li M, Liu W, Slaveykova VI. NanoTiO 2 materials mitigate mercury uptake and effects on green alga Chlamydomonas reinhardtii in mixture exposure. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2020; 224:105502. [PMID: 32480176 DOI: 10.1016/j.aquatox.2020.105502] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 04/17/2020] [Accepted: 04/28/2020] [Indexed: 06/11/2023]
Abstract
The present study examined the effect of titanium dioxide nanoparticles (nanoTiO2) and mercury (Hg) compounds on the green alga, Chlamydomonas reinhardtii. Mixtures containing nanoTiO2 of different primary sizes (5 nm, 15 nm and 20 nm), inorganic Hg (IHg) or monomethyl Hg (CH3Hg+, MeHg) were studied and compared with individual treatments. Oxidative stress and membrane damage were examined. Stability of nanoTiO2 materials in terms of hydrodynamic size and surface charge as well as Hg adsorption on different nanoTiO2 materials were characterized. The uptake of Hg compounds in the absence and presence of nanoTiO2 was also quantified. Results show that increasing concentrations of nanoTiO2 with different primary size diminished oxidative stress and membrane damage induced by high concentrations of IHg or MeHg, due to the adsorption of Hg on the nanoTiO2 aggregates and consequent decrease of cellular Hg concentrations. The observed alleviation effect of nanoTiO2 materials on Hg biouptake and toxicity was more pronounced for the materials with smaller primary size. IHg adsorbed onto the nanoTiO2 materials to a higher extent than MeHg. The present study highlights that the effects of contaminants are modulated by the co-existing engineered nanomaterials; therefore, it is essential to get a better understanding of their combined effect in the environment.
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Affiliation(s)
- Mengting Li
- Environmental Biogeochemistry and Ecotoxicology, Department F.-A. Forel for Environmental and Aquatic Sciences, School of Earth and Environmental Sciences, Faculty of Science, and Institute for Environmental Sciences, University of Geneva, Uni Carl Vogt, 66, Boulevard Carl-Vogt, CH-1211 Genève 4, Switzerland
| | - Wei Liu
- Environmental Biogeochemistry and Ecotoxicology, Department F.-A. Forel for Environmental and Aquatic Sciences, School of Earth and Environmental Sciences, Faculty of Science, and Institute for Environmental Sciences, University of Geneva, Uni Carl Vogt, 66, Boulevard Carl-Vogt, CH-1211 Genève 4, Switzerland
| | - Vera I Slaveykova
- Environmental Biogeochemistry and Ecotoxicology, Department F.-A. Forel for Environmental and Aquatic Sciences, School of Earth and Environmental Sciences, Faculty of Science, and Institute for Environmental Sciences, University of Geneva, Uni Carl Vogt, 66, Boulevard Carl-Vogt, CH-1211 Genève 4, Switzerland.
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In Vitro Effects of Titanium Dioxide Nanoparticles (TiO 2NPs) on Cadmium Chloride (CdCl 2) Genotoxicity in Human Sperm Cells. NANOMATERIALS 2020; 10:nano10061118. [PMID: 32517002 PMCID: PMC7353430 DOI: 10.3390/nano10061118] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 06/02/2020] [Accepted: 06/03/2020] [Indexed: 12/26/2022]
Abstract
The environmental release of titanium dioxide nanoparticles (TiO2NPs) associated with their intensive use has been reported to have a genotoxic effect on male fertility. TiO2NP is able to bind and transport environmental pollutants, such as cadmium (Cd), modifying their availability and/or toxicity. The aim of this work is to assess the in vitro effect of TiO2NPs and cadmium interaction in human sperm cells. Semen parameters, apoptotic cells, sperm DNA fragmentation, genomic stability and oxidative stress were investigated after sperm incubation in cadmium alone and in combination with TiO2NPs at different times (15, 30, 45 and 90 min). Our results showed that cadmium reduced sperm DNA integrity, and increased sperm DNA fragmentation and oxidative stress. The genotoxicity induced by TiO2NPs-cadmium co-exposure was lower compared to single cadmium exposure, suggesting an interaction of the substances to modulate their reactivity. The Quantitative Structure-Activity Relationship (QSAR) computational method showed that the interaction between TiO2NPs and cadmium leads to the formation of a sandwich-like structure, with cadmium in the middle, which results in the inhibition of its genotoxicity by TiO2NPs in human sperm cells.
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Impact of Titanium Dioxide Nanoparticles on Cd Phytotoxicity and Bioaccumulation in Rice ( Oryza sativa L.). INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17092979. [PMID: 32344831 PMCID: PMC7246507 DOI: 10.3390/ijerph17092979] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 04/20/2020] [Accepted: 04/23/2020] [Indexed: 11/30/2022]
Abstract
The impact of engineered nanoparticles (ENPs) on the migration and toxicity of coexisting pollutants is still unclear, especially in soil media. This study aims to evaluate the impact of titanium dioxide nanoparticles (TiO2 NPs) on the phytotoxicity of cadmium (Cd) to Oryza sativa L., and the migration of cadmium (Cd) in the soil-rice system. Three different Cd stress groups (C1 group: 1.0 mg kg−1, C2 group: 2.5 mg kg−1 and C3 group: 5.0 mg kg−1) were set in the pot experiment, and the target concentration of TiO2 NPs in each group were 0 mg kg−1 (T0), 50 mg kg−1 (T1), 100 mg kg−1 (T2) and 500 mg kg−1 (T3). Plant height and biomass decreased with the increasing of Cd content in paddy soil. TiO2 NPs could lower the phytotoxicity of Cd in terms of the changes in the morphological and biochemical characteristics, especially in the tillering and booting stage. In the tillering stage, TiO2 NPs addition caused a significant increase in plant height, biomass and the total chlorophyll content in the leaves of Oryza saliva L. In the booting stage, TiO2 NPs addition caused a 15% to 32% and 24% to 48% reduction of malondialdehyde (MDA) content for the C2 and C3 group, respectively, compared to that of the respective control treatment (T0). TiO2-NPs addition reduced the activity of peroxidase (POD) in the leaves in the booting and heading stage, and the activity of catalase (CAT) in the tillering stage. In the C1 and C2 group, the grain Cd content in the 100 and 500 mg kg−1 TiO2 NPs treatments reached 0.47–0.84 mg kg−1, obviously higher than that of the treatment without TiO2 NPs (0.27–0.32 mg kg−1), suggesting that TiO2-NPs could promote Cd migration in the soil-rice system.
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Effects of Mixtures of Engineered Nanoparticles and Metallic Pollutants on Aquatic Organisms. ENVIRONMENTS 2020. [DOI: 10.3390/environments7040027] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
In aquatic environment, engineered nanoparticles (ENPs) are present as complex mixtures with other pollutants, such as trace metals, which could result in synergism, additivity or antagonism of their combined effects. Despite the fact that the toxicity and environmental risk of the ENPs have received extensive attention in the recent years, the interactions of ENPs with other pollutants and the consequent effects on aquatic organisms represent an important challenge in (nano)ecotoxicology. The present review provides an overview of the state-of-the-art and critically discusses the existing knowledge on combined effects of mixtures of ENPs and metallic pollutants on aquatic organisms. The specific emphasis is on the adsorption of metallic pollutants on metal-containing ENPs, transformation and bioavailability of ENPs and metallic pollutants in mixtures. Antagonistic, additive and synergistic effects observed in aquatic organisms co-exposed to ENPs and metallic pollutants are discussed in the case of “particle-proof” and “particle-ingestive” organisms. This knowledge is important in developing efficient strategies for sound environmental impact assessment of mixture exposure in complex environments.
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Kuang X, Shao J, Peng L, Song H, Wei X, Luo S, Gu JD. Nano-TiO 2 enhances the adsorption of Cd(II) on biological soil crusts under mildly acidic conditions. JOURNAL OF CONTAMINANT HYDROLOGY 2020; 229:103583. [PMID: 31818435 DOI: 10.1016/j.jconhyd.2019.103583] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 10/28/2019] [Accepted: 12/02/2019] [Indexed: 06/10/2023]
Abstract
Biological soil crusts (BSCs), which are ubiquitous in paddy fields, are known to remove pollutants from paddy fields systems. The Nano-TiO2 enhanced the removal of Cd(II) by BSC under acidic irrigation water was found, and its mechanism was investigated. After the addition of nano-TiO2, the Cd(II) removal efficiency of BSCS increased by 26.70% than that of pure BSCs, and the Nano-TiO2 induced faster removal velocity as well. Zeta potential and potentiometric titration results revealed that BSCs generated more negative charges and sites concentration after addition of Nano-TiO2 at acidic environment. The carboxyl and amino/hydroxyl groups were the main functional groups on BSC and the BSC + TiO2. The higher concentration of amino/hydroxyl groups in BSC + TiO2 (0.33 ± 0.08 mmol/g) was present than that of pristine BSCs (0.62 ± 0.02 mmol/g), and they were with similar concentration of phosphate groups and carboxyl groups. This result was attributed to the Nano-TiO2 stimulated the BSCs to produce more extracellular polysaccharides and proteins. Our findings would provide novel strategy for the removal of cadmium from acidic irrigation water.
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Affiliation(s)
- Xiaolin Kuang
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, PR China
| | - Jihai Shao
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, PR China
| | - Liang Peng
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, PR China.
| | - Huijuan Song
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, PR China
| | - Xiangdong Wei
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, PR China
| | - Si Luo
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, PR China
| | - Ji-Dong Gu
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, PR China; Laboratory of Environmental Microbiology and Toxicology, School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, PR China
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Li X, Ma Q, Liu T, Dong Z, Fan W. Effect of TiO2-nanoparticles on copper toxicity to bacteria: role of bacterial surface. RSC Adv 2020; 10:5058-5065. [PMID: 35498301 PMCID: PMC9049159 DOI: 10.1039/c9ra08270k] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Accepted: 01/04/2020] [Indexed: 11/21/2022] Open
Abstract
The impact of titanium dioxide nanoparticles (nano-TiO2) on the aquatic environment is an important issue due to their increasing application. Although nano-TiO2 was reported to show an effect on heavy metal toxicity to aquatic organisms, the underlying mechanism is not well understood. In this study, two bacterial species (Bacillus thuringiensis (B. thuringiensis) and Bacillus megaterium (B. megaterium)) from sediment were selected to study the effects of nano-TiO2 on copper toxicity. Nano-TiO2 was found to inhibit the growth of B. thuringiensis and enhance the oxidative stress damage caused by copper, whereas these effects were not observed for B. megaterium. Transmission electron microscopy and flow cytometry showed that B. thuringiensis has stronger association ability to nano-TiO2 than B. megaterium. The existence of the S-layer on the surface of B. thuringiensis might be the possible reason, leading to the difference in copper toxicity. This indicates that the characteristics of bacterial surfaces might be important to the toxicity responses of nanoparticles. Different surface characteristics of bacteria, for example, S-layer or exopolysaccharides, might lead to different effects of nanomaterials on metal toxicity.![]()
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Affiliation(s)
- Xiaomin Li
- School of Space and Environment
- Beihang University
- Beijing 100191
- P. R. China
| | - Qingquan Ma
- School of Space and Environment
- Beihang University
- Beijing 100191
- P. R. China
| | - Tong Liu
- School of Space and Environment
- Beihang University
- Beijing 100191
- P. R. China
| | - Zhaomin Dong
- School of Space and Environment
- Beihang University
- Beijing 100191
- P. R. China
- Beijing Advanced Innovation Center for Big Data-Based Precision Medicine
| | - Wenhong Fan
- School of Space and Environment
- Beihang University
- Beijing 100191
- P. R. China
- Beijing Advanced Innovation Center for Big Data-Based Precision Medicine
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12
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De Marchi L, Coppola F, Soares AMVM, Pretti C, Monserrat JM, Torre CD, Freitas R. Engineered nanomaterials: From their properties and applications, to their toxicity towards marine bivalves in a changing environment. ENVIRONMENTAL RESEARCH 2019; 178:108683. [PMID: 31539823 DOI: 10.1016/j.envres.2019.108683] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 07/18/2019] [Accepted: 08/20/2019] [Indexed: 05/05/2023]
Abstract
As a consequence of their unique characteristics, the use of Engineered Nanomaterials (ENMs) is rapidly increasing in industrial, agricultural products, as well as in environmental technology. However, this fast expansion and use make likely their release into the environment with particular concerns for the aquatic ecosystems, which tend to be the ultimate sink for this type of contaminants. Considering the settling behaviour of particulates, benthic organisms are more likely to be exposed to these compounds. In this way, the present review aims to summarise the most recent data available from the literature on ENMs behaviour and fate in aquatic ecosystems, focusing on their ecotoxicological impacts towards marine and estuarine bivalves. The selection of ENMs presented here was based on the OECD's Working Party on Manufactured Nanomaterials (WPMN), which involves the safety testing and risk assessment of ENMs. Physical-chemical characteristics and properties, applications, environmental relevant concentrations and behaviour in aquatic environment, as well as their toxic impacts towards marine bivalves are discussed. Moreover, it is also identified the impacts derived from the simultaneous exposure of marine organisms to ENMs and climate changes as an ecologically relevant scenario.
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Affiliation(s)
- Lucia De Marchi
- Department of Biology & Center for Environmental and Marine Studies (CESAM), University of Aveiro, 3810-193, Aveiro, Portugal; Department of Mechanical Engineering & Center for Mechanical Technology and Automation (TEMA), University of Aveiro, 3810-193, Aveiro, Portugal
| | - Francesca Coppola
- Department of Biology & Center for Environmental and Marine Studies (CESAM), University of Aveiro, 3810-193, Aveiro, Portugal
| | - Amadeu M V M Soares
- Department of Biology & Center for Environmental and Marine Studies (CESAM), University of Aveiro, 3810-193, Aveiro, Portugal
| | - Carlo Pretti
- Department of Veterinary Sciences, University of Pisa, San Piero a Grado, Pisa, 56122, Italy
| | - José M Monserrat
- Universidade Federal Do Rio Grande, FURG, Instituto de Ciências Biológicas (ICB), Av Itália km 8 s/n - Caixa Postal 474, 96200-970, Rio Grande, RS, Brazil
| | - Camilla Della Torre
- Department of Biosciences, University of Milan, Via Celoria 26, 20133, Milano, Italy
| | - Rosa Freitas
- Department of Biology & Center for Environmental and Marine Studies (CESAM), University of Aveiro, 3810-193, Aveiro, Portugal.
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Li M, Pei J, Tang X, Guo X. Effects of surfactants on the combined toxicity of TiO 2 nanoparticles and cadmium to Escherichia coli. J Environ Sci (China) 2018; 74:126-133. [PMID: 30340666 DOI: 10.1016/j.jes.2018.02.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 02/26/2018] [Accepted: 02/26/2018] [Indexed: 06/08/2023]
Abstract
The combined ecological toxicity of TiO2 nanoparticles (nano-TiO2) and heavy metals has been paid more attention. As the common pollutants in water environment, surfactants could affect the properties of nanoparticles and heavy metals, and thus further influence the combined toxicity of nano-TiO2 and heavy metals. In this study, the effects of sodium dodecyl benzene sulfonate (SDBS) and Tween 80 on the single and combined toxicities of Cd2+ and nano-TiO2 to Escherichia coli (E. coli) were examined, and the underlying influence mechanism was further discussed. The results showed both SDBS and Tween 80 enhanced the toxicity of Cd2+ to E. coli in varying degrees. The reaction of SDBS and Cd2+ could increase the outer membrane permeability and the bioavailability of Cd, while Tween 80 itself could enhance the outer membrane permeability. The combined toxicity of nano-TiO2 and Cd2+ to E. coli in absence of surfactant was antagonistic because of the adsorption of Cd2+ to nano-TiO2 particles. However, in the presence of SDBS, both SDBS and nano-TiO2 influenced the toxicity of Cd2+, and also SDBS could adsorb to nano-TiO2 by binding to Cd2+. The combined toxicity was reduced at Cd2+ lower than 4mg/L and enhanced at Cd2+ higher than 4mg/L under multiple interactions. Tween 80 enhanced the combined toxicity of nano-TiO2 and Cd2+ by increasing the outer membrane permeability. Our study firstly elucidated the effects of surfactants on the combined toxicity of nano-TiO2 and Cd2+ to bacteria, and the underlying influencing mechanism was proposed.
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Affiliation(s)
- Mei Li
- School of Environmental and Resource Sciences, Zhejiang A & F University, Hangzhou 311300, China.
| | - Jianchuan Pei
- School of Environmental and Resource Sciences, Zhejiang A & F University, Hangzhou 311300, China
| | - Xiaomeng Tang
- School of Environmental and Resource Sciences, Zhejiang A & F University, Hangzhou 311300, China
| | - Xiaoli Guo
- School of Environmental and Resource Sciences, Zhejiang A & F University, Hangzhou 311300, China
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14
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Wang J, Dai H, Nie Y, Wang M, Yang Z, Cheng L, Liu Y, Chen S, Zhao G, Wu L, Guang S, Xu A. TiO 2 nanoparticles enhance bioaccumulation and toxicity of heavy metals in Caenorhabditis elegans via modification of local concentrations during the sedimentation process. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 162:160-169. [PMID: 29990727 DOI: 10.1016/j.ecoenv.2018.06.051] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Revised: 06/13/2018] [Accepted: 06/15/2018] [Indexed: 06/08/2023]
Abstract
Unintentionally released titanium dioxide nanoparticles (TiO2 NPs) may co-occur with pre-existing heavy metal pollutants in aquatic environments. However, the interactions between NPs and heavy metals (HMs) and their co-effects in living organisms are largely unknown. The aim of this investigation was to illustrate the influence of TiO2 NPs (5 and 15 nm) on the bioaccumulation and toxicity of cadmium (Cd), arsenate (As(III)), and nickel (Ni) in Caenorhabditis elegans (C. elegans) during the process of sedimentation in aquatic environment. Our data showed that HMs accelerated the aggregation of TiO2 NPs. The rapid aggregation and sedimentation of TiO2 NPs changed the vertical distribution of HMs through adsorption and induced increased and prolonged exposure of benthic species. Aggregate particle size along with ionic strength were the major factors affecting the rate of sedimentation. TiO2 NPs at non-toxic concentrations efficiently enhanced the bioaccumulation and reproductive toxicity of HMs to C. elegans in a dose- and size-dependent manner; however, the effect of TiO2 NPs on As(III) was obviously lower than that on two valence metals. These data provided clear evidence that TiO2 NPs could serve as environmental regulators to significantly facilitate the toxicity and the accumulation of HMs in C. elegans, indicating that the interaction and fate of TiO2 NPs and HMs on their co-toxic responses during the sedimentation should be considered as a necessary and integral part of risk assessment in the ecological system.
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Affiliation(s)
- Jingjing Wang
- School of Environmental Science and Optoelectronic Technology, University of Science and Technology of China, Hefei, Anhui 230026, PR China; Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Chinese Academy of Sciences, Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China
| | - Hui Dai
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Chinese Academy of Sciences, Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China
| | - Yaguang Nie
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Chinese Academy of Sciences, Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China
| | - Mudi Wang
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Chinese Academy of Sciences, Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China
| | - Zhen Yang
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Chinese Academy of Sciences, Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China
| | - Lei Cheng
- School of Environmental Science and Optoelectronic Technology, University of Science and Technology of China, Hefei, Anhui 230026, PR China; Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Chinese Academy of Sciences, Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China
| | - Yun Liu
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Chinese Academy of Sciences, Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China
| | - Shaopeng Chen
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Chinese Academy of Sciences, Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China
| | - Guoping Zhao
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Chinese Academy of Sciences, Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China
| | - Lijun Wu
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Chinese Academy of Sciences, Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China; Institutes of Physical Science and Information Technology, Anhui University, Hefei, Anhui, 230601, PR China
| | - Shouhong Guang
- School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230027, PR China
| | - An Xu
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Chinese Academy of Sciences, Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China; Institutes of Physical Science and Information Technology, Anhui University, Hefei, Anhui, 230601, PR China.
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15
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Liu Y, Nie Y, Wang J, Wang J, Wang X, Chen S, Zhao G, Wu L, Xu A. Mechanisms involved in the impact of engineered nanomaterials on the joint toxicity with environmental pollutants. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 162:92-102. [PMID: 29990744 DOI: 10.1016/j.ecoenv.2018.06.079] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 06/21/2018] [Accepted: 06/25/2018] [Indexed: 06/08/2023]
Abstract
Emerging nanoscience and nanotechnology inevitably facilitate discharge of engineered nanomaterials (ENMs) into the environment. Owing to their versatile physicochemical properties, ENMs invariably come across and interact with various pollutants already existing in the environment, leading to considerable uncertainty regarding the risk assessment of pollutants. Nevertheless, the underlying mechanisms of the complicated joint toxicity are still largely unexplored. This review aims to aid in understanding the interaction of ENMs and pollutants from the perspective of ecological and environmental health risk assessment. Based on related research published from 2005 to 2018, this review focuses on summarizing the effect of ENMs on the toxicity of pollutants both in vivo and in vitro. Physicochemical interaction appears as a main factor affecting ENMs-pollutants joint toxicity, with the mechanisms and the resultants for ENM-pollutant adsorption been illustrated. Cellular and molecular mechanisms involved in the joint toxicity of ENMs and pollutants are discussed, including the effect of ENMs on the bioaccumulation, biodistribution, and metabolism of pollutants, as well as the defense responses of organisms against such pollutants. Future in-depth investigation are suggested to focus on further exploring biological mechanisms (especially for the antagonized effect of ENMs against pollutants), using more advanced mammalian models, and paying more attention to the realistic exposure scenarios.
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Affiliation(s)
- Yun Liu
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Chinese Academy of Sciences; Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China
| | - Yaguang Nie
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Chinese Academy of Sciences; Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China
| | - Jingjing Wang
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Chinese Academy of Sciences; Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China; School of Environmental Science and Optoelectronic Technology, University of Science and Technology of China, Hefei, Anhui 230026, PR China
| | - Juan Wang
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Chinese Academy of Sciences; Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China; University of Science and Technology of China, Hefei, Anhui 230026, PR China
| | - Xue Wang
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Chinese Academy of Sciences; Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China; School of Environmental Science and Optoelectronic Technology, University of Science and Technology of China, Hefei, Anhui 230026, PR China
| | - Shaopeng Chen
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Chinese Academy of Sciences; Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China
| | - Guoping Zhao
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Chinese Academy of Sciences; Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China
| | - Lijun Wu
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Chinese Academy of Sciences; Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China; Institutes of Physical Science and Information Technology, Anhui University, Hefei, Anhui, 230601, PR China
| | - An Xu
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Chinese Academy of Sciences; Anhui Province Key Laboratory of Environmental Toxicology and Pollution Control Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, PR China; Institutes of Physical Science and Information Technology, Anhui University, Hefei, Anhui, 230601, PR China.
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16
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Naasz S, Altenburger R, Kühnel D. Environmental mixtures of nanomaterials and chemicals: The Trojan-horse phenomenon and its relevance for ecotoxicity. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 635:1170-1181. [PMID: 29710572 DOI: 10.1016/j.scitotenv.2018.04.180] [Citation(s) in RCA: 108] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 04/13/2018] [Accepted: 04/13/2018] [Indexed: 06/08/2023]
Abstract
The usage of engineered nanomaterials (NM) offers many novel products and applications with advanced features, but at the same time raises concerns with regard to potential adverse biological effects. Upon release and emission, NM may interact with chemicals in the environment, potentially leading to a co-exposure of organisms and the occurrence of mixture effects. A prominent idea is that NM may act as carriers of chemicals, facilitating and enhancing the entry of substances into cells or organisms, subsequently leading to an increased toxicity. In the literature, the term 'Trojan-horse effect' describes this hypothesis. The relevance of this mechanism for organisms is, however, unclear as yet. Here, a review has been performed to provide a more systematic picture on existing evidence. It includes 151 experimental studies investigating the exposure of various NM and chemical mixtures in ecotoxicological in vitro and in vivo model systems. The papers retrieved comprised studies investigating (i) uptake, (ii) toxicity and (iii) investigations considering both, changes in substance uptake and toxicity upon joint exposure of a chemical with an NM. A closer inspection of the studies demonstrated that the existing evidence for interference of NM-chemical mixture exposure with uptake and toxicity points into different directions compared to the original Trojan-horse hypothesis. We could discriminate at least 7 different categories to capture the evidence ranging from no changes in uptake and toxicity to an increase in uptake and toxicity upon mixture exposure. Concluding recommendations for the consideration of relevant processes are given, including a proposal for a nomenclature to describe NM-chemical mixture interactions in consistent terms.
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Affiliation(s)
- Steffi Naasz
- Helmholtz Centre for Environmental Research - UFZ, Department Bioanalytical Ecotoxicology, Permoserstr. 15, 04318 Leipzig, Germany
| | - Rolf Altenburger
- Helmholtz Centre for Environmental Research - UFZ, Department Bioanalytical Ecotoxicology, Permoserstr. 15, 04318 Leipzig, Germany
| | - Dana Kühnel
- Helmholtz Centre for Environmental Research - UFZ, Department Bioanalytical Ecotoxicology, Permoserstr. 15, 04318 Leipzig, Germany.
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17
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Deng R, Lin D, Zhu L, Majumdar S, White JC, Gardea-Torresdey JL, Xing B. Nanoparticle interactions with co-existing contaminants: joint toxicity, bioaccumulation and risk. Nanotoxicology 2017. [DOI: 10.1080/17435390.2017.1343404] [Citation(s) in RCA: 156] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Rui Deng
- Department of Environmental Science, Zhejiang University, Hangzhou, China
| | - Daohui Lin
- Department of Environmental Science, Zhejiang University, Hangzhou, China
- Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Zhejiang University, Hangzhou, China
| | - Lizhong Zhu
- Department of Environmental Science, Zhejiang University, Hangzhou, China
- Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Zhejiang University, Hangzhou, China
| | | | - Jason C. White
- The Connecticut Agricultural Experiment Station, New Haven, CT, USA
| | - Jorge L. Gardea-Torresdey
- Department of Chemistry, The University of Texas at El Paso, El Paso, TX, USA
- University of California Center for Environmental Implications of Nanotechnology (UC CEIN), The University of Texas at El Paso, El Paso, TX, USA
| | - Baoshan Xing
- Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA, USA
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18
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Jośko I, Oleszczuk P, Skwarek E. Toxicity of combined mixtures of nanoparticles to plants. JOURNAL OF HAZARDOUS MATERIALS 2017; 331:200-209. [PMID: 28273569 DOI: 10.1016/j.jhazmat.2017.02.028] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 02/15/2017] [Accepted: 02/16/2017] [Indexed: 05/25/2023]
Abstract
An increasing production and using of nanoproducts results in releasing and dispersing nanoparticles (NPs) in the environment. Being released into various environment components, NPs may interact with numerous pollutants, including other NPs. This research aimed at assessing toxicity of combined binary mixtures of NPs. The study focused on assessing mixtures of NPs believed to be toxic (nano-ZnO+nano-CuO) and nano-ZnO/nano-CuO with the ones that are insignificantly toxic or non-toxic NPs (nano-TiO2/nano-Cr2O3/nano-Fe2O3). Toxicity of combined mixtures proved comparable to toxicity of individual mixtures of NPs (the sum of effects triggered by individual types of NPs comprising respective mixtures). Toxicity evaluation was based on two parameters: seed germination and inhibition of root growth with respect to four plant species: Lepidium sativum, Linum utisassimmum, Cucumis sativus and Triticum aestivum. The findings showed combined mixtures of NPs to be significantly less toxic in comparison to individual mixtures, irrespective of their components. Within the scope of concentrations used, greatest differences between the toxicity of mixtures were reported at the 100mgL-1 concentration. Toxicity levels of combined and individual mixtures might have been determined by a lower total concentration of Zn and Cu metals and a greater aggregation of particles in combined mixtures than in individual mixtures.
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Affiliation(s)
- Izabela Jośko
- Institute of Plant Genetics, Breeding and Biotechnology, Faculty of Agrobioengineering, University of Life Sciences in Lublin, Poland; Department of Environmental Chemistry, Faculty of Chemistry, University of Marie Skłodowska-Curie, Lublin, Poland.
| | - Patryk Oleszczuk
- Department of Environmental Chemistry, Faculty of Chemistry, University of Marie Skłodowska-Curie, Lublin, Poland.
| | - Ewa Skwarek
- Department of Radiochemistry and Colloid Chemistry, Faculty of Chemistry, University of Marie Skłodowska-Curie, Lublin, Poland.
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19
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Fan W, Peng R, Li X, Ren J, Liu T, Wang X. Effect of titanium dioxide nanoparticles on copper toxicity to Daphnia magna in water: Role of organic matter. WATER RESEARCH 2016; 105:129-137. [PMID: 27611640 DOI: 10.1016/j.watres.2016.08.060] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Revised: 08/16/2016] [Accepted: 08/28/2016] [Indexed: 05/29/2023]
Abstract
Inevitably released into natural water, titanium dioxide nanoparticles (nano-TiO2) may affect the toxicity of other contaminants. Ubiquitous organic matter (OM) may influence their combined toxicity, which has been rarely reported. This study investigated the effect of nano-TiO2 on Cu toxicity to Daphnia magna and the role of OM (dissolved or particle surface bound) in inducing combined effects. The effect of nano-TiO2 on heavy metal accumulation depended on the adsorption capacity for heavy metals of nano-TiO2 and the uptake of nano-TiO2-metal complexes by organisms. Nano-TiO2 significantly decreased Cu accumulation in D. magna, but the reducing effect of nano-TiO2 was eliminated in the presence of humic acid (HA, a model OM). In the Cu and HA solution, nano-TiO2 slightly affected the bioavailability of Cu2+ and Cu-HA complexes and thus slightly influenced Cu toxicity. The nanoparticle surface-bound HA reduced the effect of nano-TiO2 on the speciation of the accumulated Cu; therefore, the combined effects of nano-TiO2 and Cu on biomarkers similarly weakened. HA-altered Cu speciation may be the main factor responsible for the influence of HA on the combined effects of nano-TiO2 and Cu. This study provides insights into the combined effects of nano-TiO2 and heavy metals in natural water.
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Affiliation(s)
- Wenhong Fan
- Department of Environmental Science and Engineering, School of Space and Environment, Beihang University, Beijing 100191, PR China.
| | - Ruishuang Peng
- Department of Environmental Science and Engineering, School of Space and Environment, Beihang University, Beijing 100191, PR China
| | - Xiaomin Li
- Department of Environmental Science and Engineering, School of Space and Environment, Beihang University, Beijing 100191, PR China
| | - Jinqian Ren
- Department of Environmental Science and Engineering, School of Space and Environment, Beihang University, Beijing 100191, PR China
| | - Tong Liu
- Department of Environmental Science and Engineering, School of Space and Environment, Beihang University, Beijing 100191, PR China
| | - Xiangrui Wang
- Department of Environmental Science and Engineering, School of Space and Environment, Beihang University, Beijing 100191, PR China
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20
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Fan W, Liu T, Li X, Peng R, Zhang Y. Nano-TiO 2 affects Cu speciation, extracellular enzyme activity, and bacterial communities in sediments. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2016; 218:77-85. [PMID: 27552040 DOI: 10.1016/j.envpol.2016.08.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 08/01/2016] [Accepted: 08/04/2016] [Indexed: 06/06/2023]
Abstract
In aquatic ecosystems, titanium dioxide nanoparticles (nano-TiO2) coexist with heavy metals and influence the existing forms and toxicities of the metal in water. However, limited information is available regarding the ecological risk of this coexistence in sediments. In this study, the effect of nano-TiO2 on Cu speciation in sediments was investigated using sequential extraction. The microcosm approach was also employed to analyze the effects of the coexistence of nano-TiO2 and Cu on extracellular enzyme activity and bacterial communities in sediments. Results showed that nano-TiO2 decreased the organic matter-bound fraction of Cu and increased the corresponding residual fraction Cu. As a result, speciation of exogenous Cu in sediments changed. During the course of the 30-day experiment, the presence of nano-TiO2 did not affect Cu-induced changes in bacterial community structure. However, the coexistence of nano-TiO2 and Cu restrained the activity of bacterial extracellular enzymes, such as alkaline phosphatase and β-glucosidase. The degree of inhibition also varied because of the different properties of extracellular enzymes. This research highlighted the importance of understanding and predicting the effects of the coexistence of nanomaterials and other pollutants in sediments.
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Affiliation(s)
- Wenhong Fan
- Department of Environmental Science and Engineering, School of Space and Environment, Beihang University, Beijing 100191, PR China.
| | - Tong Liu
- Department of Environmental Science and Engineering, School of Space and Environment, Beihang University, Beijing 100191, PR China
| | - Xiaomin Li
- Department of Environmental Science and Engineering, School of Space and Environment, Beihang University, Beijing 100191, PR China
| | - Ruishuang Peng
- Department of Environmental Science and Engineering, School of Space and Environment, Beihang University, Beijing 100191, PR China
| | - Yilin Zhang
- Department of Environmental Science and Engineering, School of Space and Environment, Beihang University, Beijing 100191, PR China
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21
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Effect of Nano-Al₂O₃ on the Toxicity and Oxidative Stress of Copper towards Scenedesmus obliquus. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2016; 13:ijerph13060575. [PMID: 27294942 PMCID: PMC4924032 DOI: 10.3390/ijerph13060575] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Revised: 05/25/2016] [Accepted: 05/26/2016] [Indexed: 01/31/2023]
Abstract
Nano-Al2O3 has been widely used in various industries; unfortunately, it can be released into the aquatic environment. Although nano-Al2O3 is believed to be of low toxicity, it can interact with other pollutants in water, such as heavy metals. However, the interactions between nano-Al2O3 and heavy metals as well as the effect of nano-Al2O3 on the toxicity of the metals have been rarely investigated. The current study investigated copper toxicity in the presence of nano-Al2O3 towards Scenedesmus obliquus. Superoxide dismutase activity and concentration of glutathione and malondialdehyde in cells were determined in order to quantify oxidative stress in this study. Results showed that the presence of nano-Al2O3 reduced the toxicity of Cu towards S. obliquus. The existence of nano-Al2O3 decreased the growth inhibition of S. obliquus. The accumulation of copper and the level of oxidative stress in algae were reduced in the presence of nano-Al2O3. Furthermore, lower copper accumulation was the main factor that mitigated copper toxicity with the addition of nano-Al2O3. The decreased copper uptake could be attributed to the adsorption of copper onto nanoparticles and the subsequent decrease of available copper in water.
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22
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Hazeem LJ, Bououdina M, Rashdan S, Brunet L, Slomianny C, Boukherroub R. Cumulative effect of zinc oxide and titanium oxide nanoparticles on growth and chlorophyll a content of Picochlorum sp. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:2821-2830. [PMID: 26452656 DOI: 10.1007/s11356-015-5493-4] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2015] [Accepted: 09/21/2015] [Indexed: 06/05/2023]
Abstract
The use of nanoparticles (NPs) is of increasing significance due to their large potential for various applications. Great attention should be paid on the possible impacts of nanoparticles on the environment as large amounts of them may reach the environment by accident or voluntarily. Marine algae are potential organisms for usage in nanopollution bioremediation in aquatic system, because of their ability to adapt to long exposure to NPs. Thus, it is of prime importance to study the possible interactions of different NPs with microalgae in assessing their potential environmental risks. Most studies on potential environmental effects of ZnO and TiO2 NPs have been performed independently and following the widely accepted, standardized test systems, which had been developed for the characterization of chemicals. In this study, we have examined the cumulative effect of ZnO and TiO2 NPs on Picochlorum sp. in addition to the individual effects of these NPs over 32 days. Our results indicate that the toxicity and availability of NPs to marine algae are reduced by their aggregation and sedimentation. NPs are found to have a negative effect on algal growth and chlorophyll a concentration during the early growth stages. In contrast, the case is reversed during the late growth stages. There is no significant difference between the effect of the NPs when they are used separately and when both ZnO and TiO2 are used together in the test (P > 0.05).
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Affiliation(s)
- Layla J Hazeem
- Department of Biology, College of Science, University of Bahrain, PO Box 32038, Manama, Kingdom of Bahrain.
| | - Mohammed Bououdina
- Nanotechnology Centre, University of Bahrain, PO Box 32038, Manama, Kingdom of Bahrain
- Department of Physics, College of Science, University of Bahrain, PO Box 32038, Manama, Kingdom of Bahrain
| | - Suad Rashdan
- Department of Chemistry, College of Science, University of Bahrain, PO Box 32038, Manama, Kingdom of Bahrain
| | - Loïc Brunet
- BioImaging Center of Lille, Université Lille 1, 59655, Villeneuve d'Ascq Cedex, France
| | - Christian Slomianny
- Inserm U1003, Laboratoire de Physiologie Cellulaire, Université Lille 1, 59655, Villeneuve d'Ascq Cedex, France
| | - Rabah Boukherroub
- Institut d'Electronique, de Microélectronique et de Nanotechnologie (IEMN), CNRS UMR 8520, Université Lille 1, Avenue Poincaré, BP 60069, 59652, Villeneuve d'Ascq Cedex, France
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23
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Kim I, Lee BT, Kim HA, Kim KW, Kim SD, Hwang YS. Citrate coated silver nanoparticles change heavy metal toxicities and bioaccumulation of Daphnia magna. CHEMOSPHERE 2016; 143:99-105. [PMID: 26188498 DOI: 10.1016/j.chemosphere.2015.06.046] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2015] [Revised: 05/29/2015] [Accepted: 06/18/2015] [Indexed: 06/04/2023]
Abstract
Citrate-coated AgNPs (c-AgNPs) have negatively charged surfaces and their surface interactions with heavy metals can affect metal toxicity in aquatic environments. This study used Daphnia magna to compare the acute toxicities and bioaccumulation of As(V), Cd, and Cu when they interact with c-AgNPs. The 24-h acute toxicities of As(V) and Cu were not affected by the addition of c-AgNPs, while bioaccumulation significantly decreased in the presence of c-AgNPs. In contrast, both the 24-h acute toxicity and bioaccumulation of Cd increased in the presence of c-AgNPs. These toxicity and bioaccumulation trends can be attributed to the interactions between the AgNP surface and the heavy metals. As(V) and c-AgNPs compete by negative charge, decreasing As(V) toxicity. Copper adheres readily to c-AgNP citrate, decreasing Cu bioavailability, and thus reducing Cu toxicity and bioaccumulation. Citrate complexes with divalent cations such as Ca and Mg reduce the competition between divalent cations and Cd on biotic ligand, increasing toxicity and bioaccumulation of Cd. This study shows that surface properties determine the effect of c-AgNPs on heavy metal toxicities and bioaccumulations; hence, further studies on the effect of nanoparticle by it surface properties are warranted.
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Affiliation(s)
- Injeong Kim
- School of Environmental Science and Engineering, Gwangju Institute of Science and Technology, 123 Chemdangwagi-ro, Buk-gu, Gwangju, Republic of Korea
| | - Byung-Tae Lee
- School of Environmental Science and Engineering, Gwangju Institute of Science and Technology, 123 Chemdangwagi-ro, Buk-gu, Gwangju, Republic of Korea.
| | - Hyun-A Kim
- School of Environmental Science and Engineering, Gwangju Institute of Science and Technology, 123 Chemdangwagi-ro, Buk-gu, Gwangju, Republic of Korea
| | - Kyoung-Woong Kim
- School of Environmental Science and Engineering, Gwangju Institute of Science and Technology, 123 Chemdangwagi-ro, Buk-gu, Gwangju, Republic of Korea
| | - Sang Don Kim
- School of Environmental Science and Engineering, Gwangju Institute of Science and Technology, 123 Chemdangwagi-ro, Buk-gu, Gwangju, Republic of Korea
| | - Yu-Sik Hwang
- Future Environmental Research Center, Korea Institute of Toxicology, Jinju 660-844, Republic of Korea; Human and Environmental Toxicology Program, University of Science and Technology (UST), Daejeon 305-350, Republic of Korea
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Della Torre C, Balbi T, Grassi G, Frenzilli G, Bernardeschi M, Smerilli A, Guidi P, Canesi L, Nigro M, Monaci F, Scarcelli V, Rocco L, Focardi S, Monopoli M, Corsi I. Titanium dioxide nanoparticles modulate the toxicological response to cadmium in the gills of Mytilus galloprovincialis. JOURNAL OF HAZARDOUS MATERIALS 2015; 297:92-100. [PMID: 25956639 DOI: 10.1016/j.jhazmat.2015.04.072] [Citation(s) in RCA: 94] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Revised: 04/22/2015] [Accepted: 04/25/2015] [Indexed: 05/29/2023]
Abstract
We investigated the influence of titanium dioxide nanoparticles (nano-TiO2) on the response to cadmium in the gills of the marine mussel Mytilus galloprovincialis in terms of accumulation and toxicity. Mussels were in vivo exposed to nano-TiO2, CdCl2, alone and in combination. Several cellular biomarkers were investigated in gills: ABC transport proteins and metallothioneins at gene/protein (abcb1, abcc-like and mt-20) and functional level, GST activity, NO production and DNA damage (Comet assay). Accumulation of total Cd and titanium in gills as in whole soft tissue was also investigated. Significant responses to Cd exposure were observed in mussel gills as up-regulation of abcb1 and mt-20 gene transcription, increases in total MT content, P-gp efflux and GST activity, DNA damage and NO production. Nano-TiO2 alone increased P-gp efflux activity and NO production. When combined with Cd, nano-TiO2 reduced the metal-induced effects by significantly lowering abcb1 gene transcription, GST activity, and DNA damage, whereas, additive effects were observed on NO production. A lower concentration of Cd was observed in the gills upon co-exposure, whereas, Ti levels were unaffected. A competitive effect in uptake/accumulation of nano-TiO2 and Cd seems to occur in gills. A confirmation is given by the observed absence of adsorption of Cd onto nano-TiO2 in sea water media.
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Affiliation(s)
- Camilla Della Torre
- Department of Physical, Earth and Environmental Sciences, University of Siena, Italy
| | - Teresa Balbi
- Department of Earth, Environmental and Life Sciences-DISTAV, University of Genoa, Italy
| | - Giacomo Grassi
- Department of Physical, Earth and Environmental Sciences, University of Siena, Italy
| | - Giada Frenzilli
- Department of Clinical and Experimental Medicine, University of Pisa, Italy
| | | | - Arianna Smerilli
- Department of Environmental, Biological and Pharmaceutical Sciences and Technologies (DiSTABiF), Seconda Università di Napoli, Caserta, Italy
| | - Patrizia Guidi
- Department of Clinical and Experimental Medicine, University of Pisa, Italy
| | - Laura Canesi
- Department of Earth, Environmental and Life Sciences-DISTAV, University of Genoa, Italy
| | - Marco Nigro
- Department of Clinical and Experimental Medicine, University of Pisa, Italy
| | - Fabrizio Monaci
- Department of Physical, Earth and Environmental Sciences, University of Siena, Italy
| | - Vittoria Scarcelli
- Department of Clinical and Experimental Medicine, University of Pisa, Italy
| | - Lucia Rocco
- Department of Environmental, Biological and Pharmaceutical Sciences and Technologies (DiSTABiF), Seconda Università di Napoli, Caserta, Italy
| | - Silvano Focardi
- Department of Physical, Earth and Environmental Sciences, University of Siena, Italy
| | - Marco Monopoli
- Centre for BioNanoInteractions, School of Chemistry and Chemical Biology, University College Dublin, Ireland
| | - Ilaria Corsi
- Department of Physical, Earth and Environmental Sciences, University of Siena, Italy.
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Liu L, Fan W, Lu H, Xiao W. Effects of the interaction between TiO2 with different percentages of exposed {001} facets and Cu(2+) on biotoxicity in Daphnia magna. Sci Rep 2015; 5:11121. [PMID: 26242603 PMCID: PMC4525146 DOI: 10.1038/srep11121] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Accepted: 04/29/2015] [Indexed: 11/09/2022] Open
Abstract
Anatase TiO2 nanosheets (NSs) with exposed {001} facets have been widely used because of their high activity and particular surface atomic configuration. However, investigations on their biotoxicity are rare. In this study, bioaccumulation of five different TiO2 (with 10%, 61%, 71%, 74% and 78% exposed {001} facets), as well as copper and enzyme activities in Daphnia magna, are systematically investigated and rationalized. The results indicated that the addition of Cu2+ enhanced agglomeration–sedimentation of TiO2, resulting in the reduction of TiO2 bioaccumulation by 10% to 26%. TiO2 nanoparticles (NPs) increased copper bioaccumulation by 9.8%, whereas the other four TiO2 nanosheets (NSs) decreased it by 43% to 53%, which depended on TiO2 variant adsorption and free Cu2+ concentrations in the supernatant. The levels of superoxide dismutase (SOD) enzyme and Na+/K+-ATPase activities suggested that oxidative stress, instead of membrane damage, was the main toxicity in D. magna. Meanwhile, the SOD enzyme activities increased with decreasing Cu accumulation and increasing Ti accumulation because of the different functions of Cu and Ti in organisms. This research highlighted the important role of the percentage of exposed {001} facets in nanostructured TiO2 on bioaccumulation and biotoxicity of TiO2 and Cu2+ in Daphnia magna.
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Affiliation(s)
- Lingling Liu
- Department of Environmental Science and Engineering, School of Chemistry and Environment, Beihang University, Beijing 100191, Beijing, P. R.China
| | - Wenhong Fan
- Department of Environmental Science and Engineering, School of Chemistry and Environment, Beihang University, Beijing 100191, Beijing, P. R.China
| | - Huiting Lu
- Department of Environmental Science and Engineering, School of Chemistry and Environment, Beihang University, Beijing 100191, Beijing, P. R.China
| | - Wei Xiao
- Department of Environmental Engineering, School of Resource &Environmental Sciences, Wuhan University, Wuhan 430072, Hubei, P. R. China
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Wang Y, Peng C, Fang H, Sun L, Zhang H, Feng J, Duan D, Liu T, Shi J. MITIGATION OF Cu(II) PHYTOTOXICITY TO RICE (ORYZA SATIVA) IN THE PRESENCE OF TiO₂ AND CeO₂ NANOPARTICLES COMBINED WITH HUMIC ACID. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2015; 34:1588-96. [PMID: 25771918 DOI: 10.1002/etc.2953] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Revised: 10/28/2014] [Accepted: 02/20/2015] [Indexed: 05/12/2023]
Abstract
Engineered nanoparticles (NPs) and natural organic matter (NOM) in the environment may interact with background contaminants such as heavy metals and modify their bioavailability and toxicity. In the present study, the combined influences of 2 common NPs (TiO2 and CeO2 ) and humic acid (HA; as a model NOM) on Cu(II) phytotoxicity to rice were investigated by a 3-d root elongation assay performed on filter paper media. The results showed that the adsorption coefficients of bare TiO2 and CeO2 NPs (100 mg/L) toward Cu(2+) are 2.65 and 4.37, respectively, at an initial concentration of 10 mg/L, suggesting that Cu(II) could be strongly adsorbed by NPs, whereas HA-coated TiO2 and CeO2 NPs further enhanced the adsorption coefficients to 4.37 and 6.85, respectively. In addition, compared with Cu-alone treatment, the addition of bare TiO2 and CeO2 NPs (1000 mg/L) increased the length of rice root by 32.5% and 39.0%, respectively; however, the presence of HA-coated TiO2 and CeO2 NPs increased the root length by 90.2% and 100.1%, respectively, which indicated that the mitigation effect of HA-coated NPs on Cu(II) phytotoxicity was more visible than that of bare NPs. The results demonstrated that coexistence of NPs and HA significantly alleviated Cu(II) phytotoxicity as a result of a decrease in bioavailable soluble Cu(II) concentration, which contributes to an understanding of the potential behavior of NPs in the environment.
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Affiliation(s)
- Yi Wang
- Department of Environmental Engineering, Zhejiang University, Hangzhou, People's Republic of China
| | - Cheng Peng
- Department of Environmental Engineering, Zhejiang University, Hangzhou, People's Republic of China
| | - Huaxiang Fang
- Department of Environmental Engineering, Zhejiang University, Hangzhou, People's Republic of China
| | - Lijuan Sun
- Department of Environmental Engineering, Zhejiang University, Hangzhou, People's Republic of China
| | - Hai Zhang
- Department of Environmental Engineering, Zhejiang University, Hangzhou, People's Republic of China
| | - Jiabei Feng
- Department of Environmental Engineering, Zhejiang University, Hangzhou, People's Republic of China
| | - Dechao Duan
- Department of Environmental Engineering, Zhejiang University, Hangzhou, People's Republic of China
| | - Tingting Liu
- Department of Environmental Engineering, Zhejiang University, Hangzhou, People's Republic of China
| | - Jiyan Shi
- Department of Environmental Engineering, Zhejiang University, Hangzhou, People's Republic of China
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27
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Yang WW, Wang Y, Huang B, Wang NX, Wei ZB, Luo J, Miao AJ, Yang LY. TiO2 nanoparticles act as a carrier of Cd bioaccumulation in the ciliate Tetrahymena thermophila. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:7568-7575. [PMID: 24912115 DOI: 10.1021/es500694t] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
When nanoparticles can enter a unicellular organism directly, how may they affect the bioaccumulation and toxicity of other pollutants already present in the environment? To answer this question, we conducted experiments with a protozoan Tetrahymena thermophila. The well-dispersed polyacrylate-coated TiO2 nanoparticles (PAA-TiO2-NPs) were used as a representative nanomaterial, and Cd as a conventional pollutant. We found that PAA-TiO2-NPs could get into Tetrahymena cells directly. Such internalization was first induced by low concentrations of Cd, but later suppressed when Cd concentrations were higher than 1 μg/L. Considering its significant adsorption on PAA-TiO2-NPs, Cd could be taken up by T. thermophila in the form of free ion or metal-nanoparticle complexes. The latter route accounted for 46.3% of Cd internalization. During the 5 h depuration period, 4.34-22.1% of Cd was excreted out, which was independent of the concentrations of intracellular Cd and PAA-TiO2-NPs. On the other hand, both free and intracellular Cd concentrations only partly predicted its toxicity at different levels of PAA-TiO2-NPs. This may have resulted from PAA-TiO2-NPs' synergistic effects and the distinct subcellular distribution of Cd taken up via the two routes above. Overall, we should pay attention to the carrier effects of nanoparticles when assessing their environmental risks.
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Affiliation(s)
- Wei-Wan Yang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University , Nanjing, Jiangsu Province 210046, China
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28
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Sun H, Ruan Y, Zhu H, Zhang Z, Zhang Y, Yu L. Enhanced bioaccumulation of pentachlorophenol in carp in the presence of multi-walled carbon nanotubes. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:2865-2875. [PMID: 24151027 DOI: 10.1007/s11356-013-2234-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2013] [Accepted: 10/09/2013] [Indexed: 06/02/2023]
Abstract
The impact of suspended particles on the bioavailability of pollutants has long been a controversial topic. In this study, adsorption of pentachlorophenol (PCP) onto a natural suspended particulate matter (SPM) and multi-walled carbon nanotubes (MWCNTs) was studied. Facilitated transports of PCP into carp by SPM and MWCNTs were evaluated by bioaccumulation tests exposing carp (Carassius auratus red var.) to PCP-contaminated water in the presence of SPM and MWCNTs, respectively. Desorption of PCP on SPM and MWCNTs in simulated digested fluids was also investigated. The results demonstrate that MWCNTs (K F = 7.99 × 10(4)) had a significantly stronger adsorption capacity for PCP than the SPM (K F = 19.0). The presence of SPM and MWCNTs both improved PCP accumulation in the carp during the 21 days of exposure, and the 21 days PCP concentration in the carp was enhanced by 25.9 and 12.8 % than that without particles, respectively. The enhancement in bioaccumulation by MWCNTs was less than that by the SPM. Considerably more PCP was accumulated in the viscera of the fish (BCF = 519495 for SPM and 148955 for MWCNTs), and the difference in PCP concentrations between different tissues became greater with particles. PCP desorption in the simulated digestive fluids was faster than that in the background solution. Compared to MWCNTs-bound PCP, more SPM-bound PCP was desorbed, and K F of desorption for SPM was at least 4 orders of magnitude higher than that for MWCNTs, which can explain the greater enhancement in bioaccumulation in the presence of SPM. Particle-bound pollutants might pose more risk than pollutants alone.
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Affiliation(s)
- Hongwen Sun
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin, 300071, China,
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29
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Tang Y, Li S, Qiao J, Wang H, Li L. Synergistic effects of nano-sized titanium dioxide and zinc on the photosynthetic capacity and survival of Anabaena sp. Int J Mol Sci 2013; 14:14395-407. [PMID: 23852017 PMCID: PMC3742250 DOI: 10.3390/ijms140714395] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2013] [Revised: 06/24/2013] [Accepted: 06/24/2013] [Indexed: 12/15/2022] Open
Abstract
Anabaena sp. was used to examine the toxicity of exposure to a nano-TiO2 suspension, Zn2+ solution, and mixtures of nano-TiO2 and Zn2+ suspensions. Typical chlorophyll fluorescence parameters, including effective quantum yield, photosynthetic efficiency and maximal electron transport rate, were measured by a pulse-amplitude modulated fluorometer. Nano-TiO2 particles exhibited no significant toxicity at concentrations lower than 10.0 mg/L. The 96 h concentration for the 50% maximal effect (EC50) of Zn2+ alone to Anabaena sp. was 0.38 ± 0.004 mg/L. The presence of nano-TiO2 at low concentrations (<1.0 mg/L) significantly enhanced the toxicity of Zn2+ and consequently reduced the EC50 value to 0.29 ± 0.003 mg/L. However, the toxicity of the Zn2+/TiO2 system decreased with increasing nano-TiO2 concentration because of the substantial adsorption of Zn2+ by nano-TiO2. The toxicity curve of the Zn2+/TiO2 system as a function of incremental nano-TiO2 concentrations was parabolic. The toxicity significantly increased at the initial stage, reached its maximum, and then decreased with increasing nano-TiO2 concentration. Hydrodynamic sizes, concentration of nano-TiO2 and Zn2+ loaded nano-TiO2 were the main parameters for synergistic toxicity.
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Affiliation(s)
- Yulin Tang
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai 200092, China; E-Mails: (S.L.); (J.Q.); (H.W.); (L.L.)
| | - Shuyan Li
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai 200092, China; E-Mails: (S.L.); (J.Q.); (H.W.); (L.L.)
| | - Junlian Qiao
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai 200092, China; E-Mails: (S.L.); (J.Q.); (H.W.); (L.L.)
| | - Hongtao Wang
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai 200092, China; E-Mails: (S.L.); (J.Q.); (H.W.); (L.L.)
| | - Lei Li
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai 200092, China; E-Mails: (S.L.); (J.Q.); (H.W.); (L.L.)
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30
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Li K, Xu Y, He Y, Yang C, Wang Y, Jia J. Photocatalytic fuel cell (PFC) and dye self-photosensitization photocatalytic fuel cell (DSPFC) with BiOCl/Ti photoanode under UV and visible light irradiation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:3490-3497. [PMID: 23472666 DOI: 10.1021/es303968n] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A fuel cell that functioned as a photo fuel cell (PFC) when irradiated with UV light and as a dye self-photosensitization photo fuel cell (DSPFC) when irradiated with visible light was proposed and investigated in this study. The system included a BiOCl/Ti plate photoanode and a Pt cathode, and dye solutions were employed as fuel. Electricity was generated at the same time as the dyes were degraded. 26.2% and 24.4% Coulombic efficiency were obtained when 20 mL of 10 mg · L(-1) Rhodamine B solution was treated with UV for 2 h and visible light for 3 h, respectively. Irradiation with natural and artificial sunlight was also evaluated. UV and visible light could be utilized at the same time and the photogenerated current was observed. The mechanism of electricity generation in BiOCl/Ti PFC and DSPFC was studied through degradation of the colorless salicylic acid solution. Factors that affect the electricity generation and dye degradation performance, such as solution pH and cathode material, were also investigated and optimized.
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Affiliation(s)
- Kan Li
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China
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