1
|
Daniel D, Vieira M, da Costa JP, Girão AV, Nunes B. Effects of microplastics on key reproductive and biochemical endpoints of the freshwater microcrustacean Daphnia magna. Comp Biochem Physiol C Toxicol Pharmacol 2024; 281:109917. [PMID: 38583695 DOI: 10.1016/j.cbpc.2024.109917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 04/01/2024] [Accepted: 04/04/2024] [Indexed: 04/09/2024]
Abstract
Human activities have directly impacted the environment, causing significant ecological imbalances. From the different contaminants resulting from human activities, plastics are of major environmental concern. Due to their high use and consequent discharge, plastics tend to accumulate in aquatic environments. There, plastics can form smaller particles (microplastics, MPs), due to fragmentation and weathering, which are more prone to interact with aquatic organisms and cause deleterious effects, including at the basis of different food webs. This study assessed the effects of two microplastics (polyethylene terephthalate, PET; and polypropylene, PP; both of common domestic use) in the freshwater cladoceran species Daphnia magna. Toxic effects were assessed by measuring reproductive traits (first brood and total number of offspring), and activities of biomarkers involved in xenobiotic metabolism (phase I: cytochrome P-450 isoenzymes CYP1A1, 1A2 and 3A4; phase II/conjugation: glutathione S-transferases; and antioxidant defense (catalase)). Both MPs showed a potential to significantly reduce reproductive parameters in D. magna. Furthermore, PET caused a significant increase in some isoenzymes of CYP450 in acutely exposed organisms, but this effect was not observed in chronically exposed animals. Similarly, the activity of the antioxidant defense (CAT) was significantly increased in acutely exposed animals, but not in chronically exposed organisms. This pattern of effects suggests a possible mechanism of long-term adaptation to the presence of the tested MPs. In conclusion, the herein tested MPs have shown the potential to induce deleterious effects on D. magna mainly observed in terms of the reproductive outcomes. Changes at the biochemical level seems transient and are not likely to occur in long term, environmentally exposed crustaceans.
Collapse
Affiliation(s)
- David Daniel
- Centro de Estudos do Ambiente e do Mar (CESAM), Campus de Santiago, Universidade de Aveiro, 3810-193 Aveiro, Portugal; Departamento de Biologia, Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - Madalena Vieira
- Centro de Estudos do Ambiente e do Mar (CESAM), Campus de Santiago, Universidade de Aveiro, 3810-193 Aveiro, Portugal; Departamento de Biologia, Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - João Pinto da Costa
- Centro de Estudos do Ambiente e do Mar (CESAM), Campus de Santiago, Universidade de Aveiro, 3810-193 Aveiro, Portugal; Departamento de Química, Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - Ana Violeta Girão
- Departamento de Engenharia de Materiais e Cerâmica, CICECO, Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - Bruno Nunes
- Centro de Estudos do Ambiente e do Mar (CESAM), Campus de Santiago, Universidade de Aveiro, 3810-193 Aveiro, Portugal; Departamento de Biologia, Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal.
| |
Collapse
|
2
|
Wang M, Wang WX. Selective ingestion and response by Daphnia magna to environmental challenges of microplastics. JOURNAL OF HAZARDOUS MATERIALS 2023; 458:131864. [PMID: 37331056 DOI: 10.1016/j.jhazmat.2023.131864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 05/28/2023] [Accepted: 06/13/2023] [Indexed: 06/20/2023]
Abstract
Our current understandings of the effects of microplastics and nanoplastics (MNPs) on aquatic animals are predominantly based on the single types of plastic particles. In the present study, we employed the highly fluorescent MNPs that incorporated aggregation-induced emission fluorogens and investigated the selective ingestion and response of Daphnia exposed to different types of plastics at environmentally relevant concentrations simultaneously. When daphnids were exposed to a single MNP, D. magna ingested them instantly in significant amounts. However, even low concentrations of algae had a significant negative impact on the MNP uptake. Specifically, algae caused the MPs to pass through the gut faster, reduced acidification and esterase activity, and changed the distribution of MPs in the gut. In addition, we also quantified the influences of size and surface charge on the selectivity of D. magna. The daphnids selectively ingested larger and positively charged plastics. MPs effectively reduced the uptake of NP and increased its gut passage time. Aggregation of positively and negatively charged MNPs also influenced the gut distribution and increased the gut passage time. The positively charged MPs accumulated in the middle and posterior gut, while aggregation of MNPs also increased acidification and esterase activity. These findings provided fundamental knowledge on the selectivity of MNPs and the microenvironmental responses of zooplankton guts.
Collapse
Affiliation(s)
- Mengjing Wang
- School of Energy and Environment and State Key Laboratory of Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong, China; Research Centre for the Oceans and Human Health, City University of Hong Kong Shenzhen Research Institute, Shenzhen 518057, China
| | - Wen-Xiong Wang
- School of Energy and Environment and State Key Laboratory of Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong, China; Research Centre for the Oceans and Human Health, City University of Hong Kong Shenzhen Research Institute, Shenzhen 518057, China.
| |
Collapse
|
3
|
Reilly K, Ellis LJA, Davoudi HH, Supian S, Maia MT, Silva GH, Guo Z, Martinez DST, Lynch I. Daphnia as a model organism to probe biological responses to nanomaterials-from individual to population effects via adverse outcome pathways. FRONTIERS IN TOXICOLOGY 2023; 5:1178482. [PMID: 37124970 PMCID: PMC10140508 DOI: 10.3389/ftox.2023.1178482] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 04/06/2023] [Indexed: 05/02/2023] Open
Abstract
The importance of the cladoceran Daphnia as a model organism for ecotoxicity testing has been well-established since the 1980s. Daphnia have been increasingly used in standardised testing of chemicals as they are well characterised and show sensitivity to pollutants, making them an essential indicator species for environmental stress. The mapping of the genomes of D. pulex in 2012 and D. magna in 2017 further consolidated their utility for ecotoxicity testing, including demonstrating the responsiveness of the Daphnia genome to environmental stressors. The short lifecycle and parthenogenetic reproduction make Daphnia useful for assessment of developmental toxicity and adaption to stress. The emergence of nanomaterials (NMs) and their safety assessment has introduced some challenges to the use of standard toxicity tests which were developed for soluble chemicals. NMs have enormous reactive surface areas resulting in dynamic interactions with dissolved organic carbon, proteins and other biomolecules in their surroundings leading to a myriad of physical, chemical, biological, and macromolecular transformations of the NMs and thus changes in their bioavailability to, and impacts on, daphnids. However, NM safety assessments are also driving innovations in our approaches to toxicity testing, for both chemicals and other emerging contaminants such as microplastics (MPs). These advances include establishing more realistic environmental exposures via medium composition tuning including pre-conditioning by the organisms to provide relevant biomolecules as background, development of microfluidics approaches to mimic environmental flow conditions typical in streams, utilisation of field daphnids cultured in the lab to assess adaption and impacts of pre-exposure to pollution gradients, and of course development of mechanistic insights to connect the first encounter with NMs or MPs to an adverse outcome, via the key events in an adverse outcome pathway. Insights into these developments are presented below to inspire further advances and utilisation of these important organisms as part of an overall environmental risk assessment of NMs and MPs impacts, including in mixture exposure scenarios.
Collapse
Affiliation(s)
- Katie Reilly
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Laura-Jayne A. Ellis
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Hossein Hayat Davoudi
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Suffeiya Supian
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Marcella T. Maia
- Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil
| | - Gabriela H. Silva
- Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil
| | - Zhiling Guo
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom
- *Correspondence: Zhiling Guo, ; Iseult Lynch,
| | - Diego Stéfani T. Martinez
- Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil
| | - Iseult Lynch
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom
- *Correspondence: Zhiling Guo, ; Iseult Lynch,
| |
Collapse
|
4
|
Wang Z, Liu R, Zhang L, Yu S, Nie Y, Deng Y, Liu R, Zhu W, Zhou Z, Diao J. Thermoregulation of Eremias argus alters temperature-dependent toxicity of beta-cyfluthrin: Ecotoxicological effects considering ectotherm behavior traits. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 293:118461. [PMID: 34748886 DOI: 10.1016/j.envpol.2021.118461] [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: 06/17/2021] [Revised: 10/27/2021] [Accepted: 11/02/2021] [Indexed: 06/13/2023]
Abstract
Risk assessments of the ecotoxicological effects insecticides impose on ectotherms have increasingly considered temperature. However, the changes toxicants induce in thermoregulatory behavioral traits may lead to a divergence of thermal selection and temperature-dependent changes of contaminant toxicity. This study demonstrated the interaction of behavioral thermoregulation and temperature-dependent toxicity of beta-cyfluthrin (BC) in the lizard Eremias argus. Based on the negative relationship between temperature and BC toxicity, seeking a warming environment was assumed to represent a self-rescue behavior (and vice versa). The results showed that BC-treated lizards (0-20 μg/g body weight (bw)) showed such self-rescue behavior, while lizards exposed to an extremely high BC dose (200 μg/g bw) sought a cooler environment. Biochemical assays showed that BC affected neurotransmitter systems, caused oxidative stress, and interfered with ion-transport in the central nervous system. Biomarkers of the cholinergic and glutamatergic system, ion-transport function, and oxidative stress were identified as potential biochemical variables related to thermoregulatory behavior. Apparently, seeking a warmer environment is a survival strategy with the aim to neutralize BC toxicity, while seeking a cooler environment aims to attenuate the harmful effects of metabolic and oxidative stress, and to decelerate internal BC diffusion. This phenomenon could be also explained by the concept of the "cooling trap", i.e., a behavior where cooler temperatures are sought. This impairs survival after exposure to BC at it has a negative temperature coefficient, derived from a dysfunction of the central nervous system regarding thermoregulation caused by the high dosage of neurotoxicant and resulting temperature maladaptation. Implications of the interaction between thermoregulatory behavior and temperature-dependent toxicity are presented, which may aid further temperature-dependent risk assessments.
Collapse
Affiliation(s)
- Zikang Wang
- Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing, 100193, China
| | - Ran Liu
- Beijing Food Safety Monitoring and Risk Assessment Center (Beijing Food Inspection Institute), Beijing, China
| | - Luyao Zhang
- Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing, 100193, China
| | - Simin Yu
- Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing, 100193, China
| | - Yufan Nie
- Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing, 100193, China
| | - Yue Deng
- Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing, 100193, China
| | - Rui Liu
- Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing, 100193, China
| | - Wentao Zhu
- Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing, 100193, China
| | - Zhiqiang Zhou
- Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing, 100193, China
| | - Jinling Diao
- Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing, 100193, China.
| |
Collapse
|
5
|
Butcherine P, Kelaher BP, Benkendorff K. Assessment of acetylcholinesterase, catalase, and glutathione S-transferase as biomarkers for imidacloprid exposure in penaeid shrimp. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2022; 242:106050. [PMID: 34915355 DOI: 10.1016/j.aquatox.2021.106050] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 11/18/2021] [Accepted: 12/02/2021] [Indexed: 06/14/2023]
Abstract
Shrimp aquaculture is a valuable source of quality seafood that can be impacted by exposure to insecticides, such as imidacloprid. Here, adult black tiger shrimp (Penaeus monodon) were used to evaluate the activity of acetylcholinesterase (AChE), catalase (CAT), and glutathione S-transferase (GST) in abdominal, head, gill, and hepatopancreas tissue as biomarkers for imidacloprid exposure. Adult P. monodon were continuously exposed to imidacloprid in water (5 μgL-1 and 30 μgL-1) or feed (12.5 μg g-1 and 75 μg g-1) for either 4 or 21 days. The imidacloprid concentration in shrimp tissues was determined using liquid chromatography-mass spectrometry after QuEChER extraction, and AChE, CAT, and GST activities were estimated by spectrophotometric assay. Imidacloprid exposure in shrimp elevated the activity of biomarkers, and the enzymatic activity was positively correlated to tissue imidacloprid accumulation, although the effects varied in a tissue-, dose- and time-dependent manner. AChE activity was correlated to imidacloprid concentration in the abdominal tissue of shrimp and was likely related to neural tissue distribution, while the activity of CAT and GST confirmed a generalised anti-oxidant stress response. AChE, CAT, and GST were valuable biomarkers for assessing shrimp response to imidacloprid exposure from dietary or water sources, and the abdominal tissue was the most reliable for exposure assessment. An elevated response in each of these biomarkers during routine monitoring could provide an early warning of shrimp stress, suggesting that investigating potential contamination by neonicotinoid pesticides would be worthwhile.
Collapse
Affiliation(s)
- Peter Butcherine
- Marine Ecology Research Centre, National Marine Science Centre, Southern Cross University, 2 Bay Drive Coffs Harbour, NSW 2450, Australia
| | - Brendan P Kelaher
- Marine Ecology Research Centre, National Marine Science Centre, Southern Cross University, 2 Bay Drive Coffs Harbour, NSW 2450, Australia
| | - Kirsten Benkendorff
- Marine Ecology Research Centre, National Marine Science Centre, Southern Cross University, 2 Bay Drive Coffs Harbour, NSW 2450, Australia.
| |
Collapse
|
6
|
Aljaibachi R, Laird WB, Stevens F, Callaghan A. Impacts of polystyrene microplastics on Daphnia magna: A laboratory and a mesocosm study. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 705:135800. [PMID: 31972940 DOI: 10.1016/j.scitotenv.2019.135800] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 11/25/2019] [Accepted: 11/25/2019] [Indexed: 06/10/2023]
Abstract
Most research into microplastics (MPs) in freshwaters has concentrated on measurements under controlled conditions without any link to the natural environment. Here we studied the effects of a 15 μm polystyrene MP on Daphnia magna survival, growth, and reproduction in the laboratory. We also exposed fifteen 25 L freshwater mesocosms to a high concentration of the same MPs. Five were controls seeded with five species found in all ponds (mosquito, water flea, midge, spire shell and water mite), five identical but treated with 15 μm polystyrene MPs and five seeded with only mosquitoes and water fleas. The laboratory chronic toxicity test for both adults and neonate Daphnia magna revealed that effects were more related to the availability of food rather than the toxicity of MPs. In the mesocosms most of the MPs settled in the sediment after the first week of exposure. After four weeks the D. magna population decreased significantly in the MP mesocosms compared to the control mesocosms, although it subsequently recovered. There was no impact on other organisms added to the mesocosms, other than a difference in timing of lesser water boatman (Corixa punctata) colonisation, which colonised the control mesocosms in week 4 and the treated 4 weeks later. The detrivorous, sediment sifting, mayfly Leptophlebia marginata appeared in mesocosms in the fourth week of sampling and with significantly higher numbers in the MP treated mesocosm. Their activity had no significant impact on MPs in the water column, although numbers did increase above zero. The significant decline of D. magna suggests that their effect in a natural situation is unpredictable where environmental conditions and invertebrate communities may add additional stresses.
Collapse
Affiliation(s)
- Rana Aljaibachi
- Ecology and Evolutionary Biology, School of Biological Sciences, University of Reading, Harborne Building, Whiteknights, Reading, Berkshire RG6 6AS, United Kingdom
| | - William Bruce Laird
- Ecology and Evolutionary Biology, School of Biological Sciences, University of Reading, Harborne Building, Whiteknights, Reading, Berkshire RG6 6AS, United Kingdom
| | - Freya Stevens
- Ecology and Evolutionary Biology, School of Biological Sciences, University of Reading, Harborne Building, Whiteknights, Reading, Berkshire RG6 6AS, United Kingdom
| | - Amanda Callaghan
- Ecology and Evolutionary Biology, School of Biological Sciences, University of Reading, Harborne Building, Whiteknights, Reading, Berkshire RG6 6AS, United Kingdom.
| |
Collapse
|
7
|
Araujo GS, Abessa DMS, Soares AMVM, Loureiro S. Multi-generational effects under single and pulse exposure scenarios in two monophyletic Daphnia species. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 697:134031. [PMID: 31476498 DOI: 10.1016/j.scitotenv.2019.134031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 07/18/2019] [Accepted: 08/20/2019] [Indexed: 06/10/2023]
Abstract
Anthropogenic activities commonly relate to a set of diffuse and point contamination sources, from industrial, domestic or agricultural outputs, characterized by a chemical cocktail exposure and consequent disturbances of natural ecosystems. Different species may present different sensitivities to contaminants, even when phylogenetically close. This study used two monophyletic Daphnia species from tropical and temperate environments, Daphnia similis and Daphnia magna respectively, to evaluate the variation of their sensitivity to Pb (if any) and fitness during a multi-generational exposure and recovery. To accomplish that, standard acute immobilization tests were done on specific generations. Tests were carried out with exposures to 1) potassium dichromate (K2Cr2O7) to evaluate organisms' sensitivity/fitness, 2) Pb, to monitor variation on Pb sensitivity and 3) the fungicide mancozeb, providing a pulse toxicity approach on generational Pb acclimated daphnids. Since growth is an important trait related to organisms' fitness, organisms' size measurements were also monitored. In addition, organisms were maintained under two different dietary regimes. Our results indicate no variation on daphnids sensitivity to K2Cr2O7, except for D. similis from a recovery period under food restriction. However, a lower Pb sensitivity was seen for both species throughout generations. Both species also showed that under food restriction neonates' sizes were larger than those kept under regular food, while reproduction was considerably reduced. Food restriction also generated opposite outcomes on both species, such as D. magna epigenetic changes and D. similis phenotypic acclimation to Pb. Besides, D. magna pre-exposed to Pb presented lower sensitivity to mancozeb, while the contrary was shown by D. similis. This study indicates that daphnids are capable of acquiring a lower sensitivity to Pb across a long-term exposure, and that Pb pre-exposure can affect the sensitivity to other chemicals. Also, different patterns in multi-generational responses from monophyletic species (especially under oligotrophic media, common on natural habitats) acknowledge the use of representative or native species to assess the effect of contaminants, since monophyletic species can provide different toxicity outputs.
Collapse
Affiliation(s)
- G S Araujo
- Department of Biology & CESAM, University of Aveiro, 3810-193, Aveiro, Portugal.
| | - D M S Abessa
- NEPEA, Campus do Litoral Paulista, Universidade Estadual Paulista Júlio de Mesquita Filho, Praça Infante Dom Henrique, s/n, CP 11330-900 São Vicente, SP, Brazil
| | - A M V M Soares
- Department of Biology & CESAM, University of Aveiro, 3810-193, Aveiro, Portugal
| | - S Loureiro
- Department of Biology & CESAM, University of Aveiro, 3810-193, Aveiro, Portugal
| |
Collapse
|
8
|
Araujo GS, Pinheiro C, Pestana JLT, Soares AMVM, Abessa DMS, Loureiro S. Toxicity of lead and mancozeb differs in two monophyletic Daphnia species. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 178:230-238. [PMID: 31026744 DOI: 10.1016/j.ecoenv.2019.03.095] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 02/08/2019] [Accepted: 03/23/2019] [Indexed: 06/09/2023]
Abstract
Lead and mancozeb are two important chemicals used for different human purposes and activities worldwide. Hazard assessment in different areas of the world is carried out with different but phylogenetically similar species, adapted to different climatic conditions, in order to increase relevance. This study evaluated the sensitivity of two monophyletic species, the tropical species Daphnia similis and the temperate species Daphnia magna, to the two chemicals lead and mancozeb. Standard acute and chronic ecotoxicological tests (reproduction and growth), as well as other sublethal measurements such as the intrinsic rate of population increase (r), feeding rate (FR) and O2 consumption, were recorded along with the analysis of the AChE activity to determine the neurotoxicity of both contaminants. Albeit their similar evolutionary status, D. magna generally presented a lower sensitivity to Pb in comparison to D. similis. Despite the differences in sensitivity, both species presented similar patterns of response under Pb exposure, with diminished reproductive outputs, feeding impairment, reduced O2 consumption and no effect on AChE activity. Mancozeb decreased the reproduction, rate of population increase and feeding rate, increased the AChE activity in both species and increased O2 consumption only in D. magna. While D. magna increased O2 consumption under mancozeb exposure, no effects were observed for D. similis. Thus, species may present different responses and sensitivities to different pollutants, regardless of their phylogeny. Therefore, the use of ecotoxicological assays with native species is crucial for a better ecological risk assessment in contaminated areas.
Collapse
Affiliation(s)
- G S Araujo
- Department of Biology & CESAM, University of Aveiro, 3810-193, Portugal.
| | - C Pinheiro
- Department of Biology & CESAM, University of Aveiro, 3810-193, Portugal
| | - J L T Pestana
- Department of Biology & CESAM, University of Aveiro, 3810-193, Portugal
| | - A M V M Soares
- Department of Biology & CESAM, University of Aveiro, 3810-193, Portugal
| | - D M S Abessa
- NEPEA, Campus do Litoral Paulista, Universidade Estadual Paulista Júlio de Mesquita Filho, Praça Infante Dom Henrique, s/n, CP 11330-900, São Vicente, SP, Brazil
| | - S Loureiro
- Department of Biology & CESAM, University of Aveiro, 3810-193, Portugal
| |
Collapse
|
9
|
Butcherine P, Benkendorff K, Kelaher B, Barkla BJ. The risk of neonicotinoid exposure to shrimp aquaculture. CHEMOSPHERE 2019; 217:329-348. [PMID: 30419387 DOI: 10.1016/j.chemosphere.2018.10.197] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 10/26/2018] [Accepted: 10/29/2018] [Indexed: 06/09/2023]
Abstract
Widespread agricultural use of systemic neonicotinoid insecticides has resulted in the unintended contamination of aquatic environments. Water quality surveys regularly detect neonicotinoids in rivers and waterways at concentrations that could impact aquaculture stock. The toxicity of neonicotinoids to non-target aquatic insect and crustacean species has been recognised, however, there is a paucity of information on their effect on commercial shrimp aquaculture. Here, we show that commercially produced shrimp are likely to be exposed to dietary, sediment and waterborne sources of neonicotinoids; increasing the risks of disease and accidental human consumption. This review examines indicators of sublethal neonicotinoid exposure in non-target species and analyses their potential usefulness for ecotoxicology assessment in shrimp. The identification of rapid, reliable responses to neonicotinoid exposure in shrimp will result in better decision making in aquaculture management.
Collapse
Affiliation(s)
- Peter Butcherine
- Marine Ecology Research Centre, Southern Cross University, PO Box 157, Lismore, NSW 2480, Australia.
| | - Kirsten Benkendorff
- Marine Ecology Research Centre, Southern Cross University, PO Box 157, Lismore, NSW 2480, Australia.
| | - Brendan Kelaher
- National Marine Science Centre, Southern Cross University, Coffs Harbour, NSW 2450, Australia.
| | - Bronwyn J Barkla
- Southern Cross Plant Science, Southern Cross University, PO Box 157, Lismore, NSW 2480, Australia.
| |
Collapse
|
10
|
Loureiro S, Gonçalves SF, Gonçalves G, Hortiguela MJ, Rebelo S, Ferro MC, Vila M. Eco-friendly profile of pegylated nano-graphene oxide at different levels of an aquatic trophic chain. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 162:192-200. [PMID: 29990731 DOI: 10.1016/j.ecoenv.2018.06.078] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 06/18/2018] [Accepted: 06/25/2018] [Indexed: 06/08/2023]
Abstract
Nanographene oxide (nGO) has been recently proposed as a new antitumoral therapeutic agent, drug delivery carrier and gene transfection vehicle, among others. Treatment is carried out by hyperthermia induced by infrared irradiation. After treatment, the nanosystems will be inevitably excreted and released to the environment. To understand the potential impacts of pegylated nGO (nGO-PEG), three key species from different trophic levels were used: the green micro-algae Raphidocelis subcapitata (growth inhibition test), the cladocera Daphnia magna (acute and chronic tests), and the fish Danio rerio (fish embryo test). Besides a regular standard procedure to assess toxicity, and considering the mode of action of nGO-PEG in cancer treatment, a simultaneous infrared lamp exposure was carried out for D. magna and D. rerio. Additionally, and taking advantage of the phenotypic transparency of D. magna, nGO-PEG was fluorescently tagged to evaluate the potential uptake of nGO-PEG. The R. subcapitata growth inhibition test showed effects during the first 48 h, recovering till the end of the test (96 h). No acute or chronic effects were observed for D. magna, under standard or infrared light exposures although confocal microscope images showed nGO-PEG uptake. Very small percentages of mortality and abnormalities were observed in D. rerio exposed with and without the infrared lamp. Although low hazard may be expected for nGO-PEG in aquatic ecosystems, further studies with species with different life traits should be accomplished, in order to derive more accurate conclusions.
Collapse
Affiliation(s)
- Susana Loureiro
- Department of Biology and CESAM, University of Aveiro, 3810-193 Aveiro, Portugal.
| | | | - Gil Gonçalves
- Department of Mechanical Engineering, TEMA-NRG, University of Aveiro, Portugal
| | | | - Sandra Rebelo
- Department of Medical Sciences, Institute of Biomedicine - iBiMED, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Marta Carmona Ferro
- Department of Materials and Ceramic Engineering, CICECO, University of Aveiro, Portugal
| | - Mercedes Vila
- Department of Mechanical Engineering, TEMA-NRG, University of Aveiro, Portugal
| |
Collapse
|
11
|
Aljaibachi R, Callaghan A. Impact of polystyrene microplastics on Daphnia magna mortality and reproduction in relation to food availability. PeerJ 2018; 6:e4601. [PMID: 29686944 PMCID: PMC5911131 DOI: 10.7717/peerj.4601] [Citation(s) in RCA: 87] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2017] [Accepted: 03/21/2018] [Indexed: 12/15/2022] Open
Abstract
Microplastics (MPs) in the environment continue to be a growing area of concern in terms of acute and chronic impacts on aquatic life. Whilst increasing numbers of studies are providing important insights into microparticle behaviour and impacts in the marine environment, a paucity of information exists regarding the freshwater environment. This study focusses on the uptake, retention and the impact of 2 µm polystyrene MPs in the freshwater cladoceran Daphnia magna in relation to food intake (algae Chlorella vulgaris), with MP size chosen to approximately match the cell size of the algae. Daphnia were exposed to varied concentrations of MPs and algae. When exposed to a single concentration of MPs Daphnia almost immediately ate them in large quantities. However, the presence of algae, even at low concentrations, had a significant negative impact on MP uptake that was not in proportion to relative availability. As MP concentrations increased, intake did not if algae were present, even at higher concentrations of MPs. This suggests that Daphnia are selectively avoiding eating plastics. Adult Daphnia exposed to MPs for 21 days showed mortality after seven days of exposure in all treatments compared to the control. However significant differences were all related to algal concentration rather than to MP concentration. This suggests that where ample food is present, MPs have little effect on adults. There was also no impact on their reproduction. The neonate toxicity test confirmed previous results that mortality and reproduction was linked to availability of food rather than MP concentrations. This would make sense in light of our suggestion that Daphnia are selectively avoiding eating microplastics.
Collapse
Affiliation(s)
- Rana Aljaibachi
- Ecology and Evolutionary Biology Section, School of Biological Sciences, University of Reading, Reading, United Kingdom
| | - Amanda Callaghan
- Ecology and Evolutionary Biology Section, School of Biological Sciences, University of Reading, Reading, United Kingdom
| |
Collapse
|
12
|
Xiao P, Liu F, Liu Y, Yao S, Zhu G. Effects of Pesticide Mixtures on Zooplankton Assemblages in Aquatic Microcosms Simulating Rice Paddy Fields. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2017; 99:27-32. [PMID: 28508304 DOI: 10.1007/s00128-017-2105-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2016] [Accepted: 05/03/2017] [Indexed: 06/07/2023]
Abstract
The individual and combined effects of pesticides (chlorpyrifos, triadimefon and butachlor) on the zooplankton assemblages of microcosms were investigated. Laboratory microcosms were constructed with water and sediment to simulate aquatic conditions in China's rice paddy fields. Results from principal response curves analysis showed that butachlor and triadimefon had no significant impact individually on the population level in zooplankton assemblages. The deleterious effects of pesticide mixtures on the zooplankton were mainly caused by chlorpyrifos. In fact, assemblage succession only occurred in the treatments containing chlorpyrifos. There was no synergy effect on the microcosm from combinations of pesticides on the assemblages. The zooplankton assemblages affected by chlorpyrifos did not recover at the termination of the experiment, i.e., after 56 days.
Collapse
Affiliation(s)
- Pengfei Xiao
- Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou, 310000, China
| | - Fuguang Liu
- Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou, 310000, China
| | - Yihua Liu
- Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou, 310000, China.
- Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang, 311400, China.
| | - Sumei Yao
- Jiyang College of Zhejiang Agriculture and Forestry University, Zhuji, 311800, China
| | - Guonian Zhu
- Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou, 310000, China
| |
Collapse
|
13
|
Barata C, Campos B, Rivetti C, LeBlanc GA, Eytcheson S, McKnight S, Tobor-Kaplon M, de Vries Buitenweg S, Choi S, Choi J, Sarapultseva EI, Coutellec MA, Coke M, Pandard P, Chaumot A, Quéau H, Delorme N, Geffard O, Martínez-Jerónimo F, Watanabe H, Tatarazako N, Lopes I, Pestana JLT, Soares AMVM, Pereira CM, De Schamphelaere K. Validation of a two-generational reproduction test in Daphnia magna: An interlaboratory exercise. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 579:1073-1083. [PMID: 27908627 PMCID: PMC5488698 DOI: 10.1016/j.scitotenv.2016.11.066] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Revised: 11/10/2016] [Accepted: 11/11/2016] [Indexed: 06/01/2023]
Abstract
Effects observed within one generation disregard potential detrimental effects that may appear across generations. Previously we have developed a two generation Daphnia magna reproduction test using the OECD TG 211 protocol with a few amendments, including initiating the second generation with third brood neonates produced from first generation individuals. Here we showed the results of an inter-laboratory calibration exercise among 12 partners that aimed to test the robustness and consistency of a two generation Daphnia magna reproduction test. Pyperonyl butoxide (PBO) was used as a test compound. Following experiments, PBO residues were determined by TQD-LC/MS/MS. Chemical analysis denoted minor deviations of measured PBO concentrations in freshly prepared and old test solutions and between real and nominal concentrations in all labs. Other test conditions (water, food, D. magna clone, type of test vessel) varied across partners as allowed in the OECD test guidelines. Cumulative fecundity and intrinsic population growth rates (r) were used to estimate "No observed effect concentrations "NOEC using the solvent control as the control treatment. EC10 and EC-50 values were obtained regression analyses. Eleven of the twelve labs succeeded in meeting the OECD criteria of producing >60 offspring per female in control treatments during 21days in each of the two consecutive generations. Analysis of variance partitioning of cumulative fecundity indicated a relatively good performance of most labs with most of the variance accounted for by PBO (56.4%) and PBO by interlaboratory interactions (20.2%), with multigenerational effects within and across PBO concentrations explaining about 6% of the variance. EC50 values for reproduction and population growth rates were on average 16.6 and 20.8% lower among second generation individuals, respectively. In summary these results suggest that the proposed assay is reproducible but cumulative toxicity in the second generation cannot reliably be detected with this assay.
Collapse
Affiliation(s)
- Carlos Barata
- Department of Environmental chemistry, Institute of Environmental Assessment and Water Research (IDAEA, CSIC), Jordi Girona 18, 08017, Barcelona, Spain.
| | - Bruno Campos
- Department of Environmental chemistry, Institute of Environmental Assessment and Water Research (IDAEA, CSIC), Jordi Girona 18, 08017, Barcelona, Spain
| | - Claudia Rivetti
- Department of Environmental chemistry, Institute of Environmental Assessment and Water Research (IDAEA, CSIC), Jordi Girona 18, 08017, Barcelona, Spain
| | - Gerald A LeBlanc
- Toxicology Program, Department of Biological Sciences, North Carolina State University, Box 7633, Raleigh NC 27695-7633, 850 Main Campus Drive, Raleigh, NC 27606, USA
| | - Stephanie Eytcheson
- Toxicology Program, Department of Biological Sciences, North Carolina State University, Box 7633, Raleigh NC 27695-7633, 850 Main Campus Drive, Raleigh, NC 27606, USA
| | - Stephanie McKnight
- Toxicology Program, Department of Biological Sciences, North Carolina State University, Box 7633, Raleigh NC 27695-7633, 850 Main Campus Drive, Raleigh, NC 27606, USA
| | - Marysia Tobor-Kaplon
- Charles River Laboratories Den Bosch B.V., Dept. of Discovery and Environmental Sciences, Hambakenwetering 7, 5231, DD's-Hertogenbosch, Netherlands
| | - Selinda de Vries Buitenweg
- Charles River Laboratories Den Bosch B.V., Dept. of Discovery and Environmental Sciences, Hambakenwetering 7, 5231, DD's-Hertogenbosch, Netherlands
| | - Suhyon Choi
- Environmental Systems Toxicology Lab., School of Environmental Engineering, University of Seoul, 163, Seoulsiripdae-ro, Dondaemun-gu, Seoul, 02504, Republic of Korea
| | - Jinhee Choi
- Environmental Systems Toxicology Lab., School of Environmental Engineering, University of Seoul, 163, Seoulsiripdae-ro, Dondaemun-gu, Seoul, 02504, Republic of Korea
| | - Elena I Sarapultseva
- National Research Nuclear University "MEPhI", Kashirskoe Highway, 31, Moscow 115409, Russian Federation
| | | | - Maïra Coke
- U3E, Unité d'Ecologie et d'Ecotoxicologie Aquatique, INRA, 35042 Rennes, France
| | - Pascal Pandard
- INERIS, Direction des Risques Chroniques, Unité EXES, Parc technologique ALATA, BP, 2, 60 550 Verneuil en Halatte, France
| | - Arnaud Chaumot
- IRSTEA, UR MALY, Laboratoire d'écotoxicologie, F-69616 Villeurbanne, France
| | - Hervé Quéau
- IRSTEA, UR MALY, Laboratoire d'écotoxicologie, F-69616 Villeurbanne, France
| | - Nicolas Delorme
- IRSTEA, UR MALY, Laboratoire d'écotoxicologie, F-69616 Villeurbanne, France
| | - Olivier Geffard
- IRSTEA, UR MALY, Laboratoire d'écotoxicologie, F-69616 Villeurbanne, France
| | - Fernando Martínez-Jerónimo
- Instituto Politécnico Nacional, Escuela Nacional de Ciencias Biológicas, Lab. de Hidrobiología Experimental, Prol. Carpio esq. Plan de Ayala S/N, Col. Santo Tomas, México, D. F. 11340, Mexico
| | - Haruna Watanabe
- National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - Norihisa Tatarazako
- National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - Isabel Lopes
- Department of Biology & CESAM, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - João L T Pestana
- Department of Biology & CESAM, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Amadeu M V M Soares
- Department of Biology & CESAM, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Cecilia Manuela Pereira
- Ghent University (UGent), Laboratory of Environmental Toxicology (GhEnToxLab), Coupure Links 653, B9000 Gent, Belgium
| | - Karel De Schamphelaere
- Ghent University (UGent), Laboratory of Environmental Toxicology (GhEnToxLab), Coupure Links 653, B9000 Gent, Belgium
| |
Collapse
|
14
|
Fischer F, Böhm L, Höss S, Möhlenkamp C, Claus E, Düring RA, Schäfer S. Passive Dosing in Chronic Toxicity Tests with the Nematode Caenorhabditis elegans. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:9708-9716. [PMID: 27494096 DOI: 10.1021/acs.est.6b02956] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In chronic toxicity tests with Caenorhabditis elegans, it is necessary to feed the nematode with bacteria, which reduces the freely dissolved concentration (Cfree) of hydrophobic organic chemicals (HOCs), leading to poorly defined exposure with conventional dosing procedures. We examined the efficacy of passive dosing of polycyclic aromatic hydrocarbons (PAHs) using silicone O-rings to control exposure during C. elegans toxicity testing and compared the results to those obtained with solvent spiking. Solid-phase microextraction and liquid-liquid extraction were used to measure Cfree and the chemicals taken up via ingestion. During toxicity testing, Cfree decreased by up to 89% after solvent spiking but remained constant with passive dosing. This led to a higher apparent toxicity on C. elegans exposed by passive dosing than by solvent spiking. With increasing bacterial cell densities, Cfree of solvent-spiked PAHs decreased while being maintained constant with passive dosing. This resulted in lower apparent toxicity under solvent spiking but an increased apparent toxicity with passive dosing, probably as a result of the higher chemical uptake rate via food (CUfood). Our results demonstrate the utility of passive dosing to control Cfree in routine chronic toxicity testing of HOCs. Moreover, both chemical uptake from water or via food ingestion can be controlled, thus enabling the discrimination of different uptake routes in chronic toxicity studies.
Collapse
Affiliation(s)
- Fabian Fischer
- German Federal Institute of Hydrology (BfG) , Am Mainzer Tor 1, 56068 Koblenz, Germany
- Institute of Soil Science and Soil Conservation, Research Center for BioSystems, Land Use, and Nutrition (iFZ), Justus Liebig University Giessen , Heinrich-Buff-Ring 26-32, 35392 Giessen, Germany
| | - Leonard Böhm
- Institute of Soil Science and Soil Conservation, Research Center for BioSystems, Land Use, and Nutrition (iFZ), Justus Liebig University Giessen , Heinrich-Buff-Ring 26-32, 35392 Giessen, Germany
| | | | - Christel Möhlenkamp
- German Federal Institute of Hydrology (BfG) , Am Mainzer Tor 1, 56068 Koblenz, Germany
| | - Evelyn Claus
- German Federal Institute of Hydrology (BfG) , Am Mainzer Tor 1, 56068 Koblenz, Germany
| | - Rolf-Alexander Düring
- Institute of Soil Science and Soil Conservation, Research Center for BioSystems, Land Use, and Nutrition (iFZ), Justus Liebig University Giessen , Heinrich-Buff-Ring 26-32, 35392 Giessen, Germany
| | - Sabine Schäfer
- German Federal Institute of Hydrology (BfG) , Am Mainzer Tor 1, 56068 Koblenz, Germany
| |
Collapse
|
15
|
Sengupta N, Gerard PD, Baldwin WS. Perturbations in polar lipids, starvation survival and reproduction following exposure to unsaturated fatty acids or environmental toxicants in Daphnia magna. CHEMOSPHERE 2016; 144:2302-11. [PMID: 26606184 PMCID: PMC4695249 DOI: 10.1016/j.chemosphere.2015.11.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Revised: 11/03/2015] [Accepted: 11/04/2015] [Indexed: 05/04/2023]
Abstract
Acclimating to toxicant stress is energy expensive. In laboratory toxicology tests dietary conditions are ideal, but not in natural environments where nutrient resources vary in quality and quantity. We compared the effects of additional lipid resources, docosahexaenoic acid (n-3; DHA) or linoleic acid (n-6; LA), or the effects of the toxicants, atrazine or triclosan on post-treatment starvation survival, reproduction, and lipid profiles. Chemical exposure prior to starvation had chemical-specific effects as DHA showed moderately beneficial effects on starvation survival and all of the other chemicals showed adverse effects on either survival or reproduction. Surprisingly, pre-exposure to triclosan inhibits adult maturation and in turn completely blocks reproduction during the starvation phase. The two HR96 activators tested, atrazine and LA adversely reduce post-reproduction survival 70% during starvation and in turn show poor fecundity. DHA and LA show distinctly different lipid profiles as DHA primarily increases the percentage of large (>37 carbon) phosphatidylcholine (PC) species and LA primarily increases the percentage of smaller (<37 carbon) PC species. The toxicants atrazine and triclosan moderately perturb a large number of different phospholipids including several phosphatidylethanolamine species. Some of these polar lipid species may be biomarkers for diets rich in specific fatty acids or toxicant classes. Overall our data demonstrates that toxicants can perturb lipid utilization and storage in daphnids in a chemical specific manner, and different chemicals can produce distinct polar lipid profiles. In summary, biological effects caused by fatty acids and toxicants are associated with changes in the production and use of lipids.
Collapse
Affiliation(s)
- Namrata Sengupta
- Environmental Toxicology Program, Clemson University, Clemson SC, 29634, USA
| | - Patrick D Gerard
- Mathematical Sciences, Clemson University, Clemson SC, 29634, USA
| | - William S Baldwin
- Environmental Toxicology Program, Clemson University, Clemson SC, 29634, USA; Biological Sciences, Clemson University, Clemson SC, 29634, USA.
| |
Collapse
|
16
|
Hou B, Lin T, Chen W. Evaluation of a drinking water treatment process involving directly recycling filter backwash water using physico-chemical analysis and toxicity assay. RSC Adv 2016. [DOI: 10.1039/c6ra14912j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Recycling the filter backwash water of a drinking water treatment plant (DWTP) was considered as a feasible method to enhance the efficiencies of pollutant removal and water conservation.
Collapse
Affiliation(s)
- Bingwei Hou
- Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes
- Hohai University
- Nanjing 210098
- PR China
- College of Environment
| | - Tao Lin
- Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes
- Hohai University
- Nanjing 210098
- PR China
- College of Environment
| | - Wei Chen
- Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes
- Hohai University
- Nanjing 210098
- PR China
- College of Environment
| |
Collapse
|
17
|
Chen T, Xu Y, Zhu S, Cui F. Combining physico-chemical analysis with a Daphnia magna bioassay to evaluate a recycling technology for drinking water treatment plant waste residuals. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2015; 122:368-376. [PMID: 26318972 DOI: 10.1016/j.ecoenv.2015.08.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Revised: 08/04/2015] [Accepted: 08/18/2015] [Indexed: 06/04/2023]
Abstract
Recycling water treatment plant (WTP) waste residuals is considered to be a feasible method to enhance the efficiency of pollutant removal. This study also evaluated the safety and water quality of a pilot-DWTP waste residuals recycling technology by combining physical-chemistry analysis with a Daphnia magna assay. The water samples taken from each treatment step were extracted and concentrated by XAD-2 resin and were then analyzed for immobilization and enzyme activity with D. magna. The measured parameters, such as the dissolve organic carbon (DOC), UV254 and THM formation potential (THMFPs) of the recycling process, did not obviously increase over 15 days of continuous operation and were even lower than typical values from a conventional process. The extract concentration ranged from 0 to 2 Leq/ml as measured on the 7th and 15th days and the immobilization of D. magna exposed to water treated by the recycling process was nearly equivalent to that of the conventional process. Both the superoxide dismutase (SOD) and the catalase (CAT) activity assay indicated that a lower dose of water extract (0.5, 1, 1.5 Leq/ml) could stimulate the enzyme activity of D. magna, whereas a higher dose (2 Leq/ml at the sampling point C3, R3, R4 ) inhibits the activity. Moreover, the SOD and CAT activity of D. magna with DOC and UV254 showed a strong concentration-effect relationship, where the concentration range of DOC and UV254 were 4.1-16.2 mg/L and 0.071-4.382 cm(-1), respectively. The results showed that there was no statistically significant difference (p>0.05) between the conventional and recycling treatment processes and the toxicity of water samples in the recycling process did not increase during the 15-day continuous recycling trial.
Collapse
Affiliation(s)
- Ting Chen
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China; School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China
| | - Yongpeng Xu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China; School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
| | - Shijun Zhu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China; School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China
| | - Fuyi Cui
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China; School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
| |
Collapse
|