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Jiang J, Liu M, Xu D, Jiang T, Zhang J. Quantitative detection of microcystin-LR in Bellamya aeruginosa by thin-layer chromatography coupled with surface-enhanced Raman spectroscopy based on in-situ ZIF-67/Ag NPs/Au NWs composite substrate. Food Chem 2024; 452:139481. [PMID: 38723565 DOI: 10.1016/j.foodchem.2024.139481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 04/15/2024] [Accepted: 04/23/2024] [Indexed: 06/01/2024]
Abstract
As a hypertoxic natural toxin, the risk of Microcystin-leucine-arginine (MC-LR) residues in Bellamya aeruginosa deserves more attention. Herein, employing the conventional thin-layer chromatography (TLC) technology and a novel surface-enhanced Raman scattering (SERS) substrate, a TLC-SERS chip was fabricated for the purification and quantitative detection of MC-LR in complex samples. The substrate exhibited excellent SERS performance with an enhancement factor of 6.6 × 107, a low detection limit of 2.27 × 10-9 mM for MC-LR, excellent uniformity and reproducibility, as well as a wide linear range. With the application of TLC, the MC-LR was efficiently purified and the concentration was increased to >3 times. Ultimately, recovery rates fluctuated between 93.28% and 101.66% were obtained from the TLC-SERS chip. On balance, the TLC-SERS chip has a robust capacity for achieving rapid and stable quantitative detection of MC-LR, which promises to improve the efficiency of food safety monitoring.
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Affiliation(s)
- Jing Jiang
- College of Food and Pharmaceutical Sciences, School of Physical Science and Technology, Ningbo University, Ningbo 315211, Zhejiang, PR China.
| | - Min Liu
- College of Food and Pharmaceutical Sciences, School of Physical Science and Technology, Ningbo University, Ningbo 315211, Zhejiang, PR China
| | - Dalun Xu
- College of Food and Pharmaceutical Sciences, School of Physical Science and Technology, Ningbo University, Ningbo 315211, Zhejiang, PR China.
| | - Tao Jiang
- College of Food and Pharmaceutical Sciences, School of Physical Science and Technology, Ningbo University, Ningbo 315211, Zhejiang, PR China.
| | - Jinjie Zhang
- College of Food and Pharmaceutical Sciences, School of Physical Science and Technology, Ningbo University, Ningbo 315211, Zhejiang, PR China.
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2
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Xu S, Wang P, Xie L, Du Y, Zhang W. Reverse Osmosis with Intermediate Chemical Demineralization: Scale Inhibitor Selection, Degradation, and Seeded Precipitation. Molecules 2024; 29:2163. [PMID: 38792025 PMCID: PMC11124285 DOI: 10.3390/molecules29102163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 04/25/2024] [Accepted: 05/02/2024] [Indexed: 05/26/2024] Open
Abstract
Two-stage reverse osmosis (RO) processes with intermediate concentrate demineralization (ICD) provide an efficient strategy to treat brines with high CaSO4 contents and reduce concentrate discharge. In this paper, an SRO concentrate is treated using ICD to remove CaSO4 and then mixed with a PRO concentrate for further desalination in SRO, thereby reducing the discharge of the concentrate. We investigate the selection and degradation of scale inhibitors, as well as seeded precipitation in the two-stage RO process with ICD, to achieve a high water recovery rate. A scale inhibitor is added to restrain CaSO4 crystallization on the membrane surface, and the optimized scale inhibitor, RO-400, is found to inhibit calcium sulfate scaling effectively across a wide range of the saturation index of gypsum (SIg) from 2.3 to 6. Under the optimized parameters of 40 W UV light and 70 mg/L H2O2, UV/H2O2 can degrade RO-400 completely in 15 min to destroy the scale inhibitor in the SRO concentrate. After scale inhibitor degradation, the SRO concentrate is desaturated by seeded precipitation, and the reaction degree of CaSO4 reaches 97.12%, leading to a concentrate with a low SIg (1.07) for cyclic desalination. Three UVD-GSP cycle tests show that the reused gypsum seeds can also ensure the effect of the CaSO4 precipitation process. This paper provides a combined UVD-GSP strategy in two-stage RO processes to improve the water recovery rate for CaSO4-contained concentrate.
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Affiliation(s)
- Shichang Xu
- Tianjin Key Laboratory of Membrane Science and Desalination Technology, State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China; (S.X.); (P.W.)
| | - Ping Wang
- Tianjin Key Laboratory of Membrane Science and Desalination Technology, State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China; (S.X.); (P.W.)
| | - Lixin Xie
- Tianjin Key Laboratory of Membrane Science and Desalination Technology, State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China; (S.X.); (P.W.)
| | - Yawei Du
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300401, China;
| | - Wen Zhang
- Tianjin Key Laboratory of Membrane Science and Desalination Technology, State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China; (S.X.); (P.W.)
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3
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Piel T, Sandrini G, Weenink EFJ, Qin H, Herk MJV, Morales-Grooters ML, Schuurmans JM, Slot PC, Wijn G, Arntz J, Zervou SK, Kaloudis T, Hiskia A, Huisman J, Visser PM. Shifts in phytoplankton and zooplankton communities in three cyanobacteria-dominated lakes after treatment with hydrogen peroxide. HARMFUL ALGAE 2024; 133:102585. [PMID: 38485435 DOI: 10.1016/j.hal.2024.102585] [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: 10/03/2023] [Revised: 12/22/2023] [Accepted: 01/18/2024] [Indexed: 03/19/2024]
Abstract
Cyanobacteria can reach high densities in eutrophic lakes, which may cause problems due to their potential toxin production. Several methods are in use to prevent, control or mitigate harmful cyanobacterial blooms. Treatment of blooms with low concentrations of hydrogen peroxide (H2O2) is a promising emergency method. However, effects of H2O2 on cyanobacteria, eukaryotic phytoplankton and zooplankton have mainly been studied in controlled cultures and mesocosm experiments, while much less is known about the effectiveness and potential side effects of H2O2 treatments on entire lake ecosystems. In this study, we report on three different lakes in the Netherlands that were treated with average H2O2 concentrations ranging from 2 to 5 mg L-1 to suppress cyanobacterial blooms. Effects on phytoplankton and zooplankton communities, on cyanotoxin concentrations, and on nutrient availability in the lakes were assessed. After every H2O2 treatment, cyanobacteria drastically declined, sometimes by more than 99%, although blooms of Dolichospermum sp., Aphanizomenon sp., and Planktothrix rubescens were more strongly suppressed than a Planktothrix agardhii bloom. Eukaryotic phytoplankton were not significantly affected by the H2O2 additions and had an initial advantage over cyanobacteria after the treatment, when ample nutrients and light were available. In all three lakes, a new cyanobacterial bloom developed within several weeks after the first H2O2 treatment, and in two lakes a second H2O2 treatment was therefore applied to again suppress the cyanobacterial population. Rotifers strongly declined after most H2O2 treatments except when the H2O2 concentration was ≤ 2 mg L-1, whereas cladocerans were only mildly affected and copepods were least impacted by the added H2O2. In response to the treatments, the cyanotoxins microcystins and anabaenopeptins were released from the cells into the water column, but disappeared after a few days. We conclude that lake treatments with low concentrations of H2O2 can be a successful tool to suppress harmful cyanobacterial blooms, but may negatively affect some of the zooplankton taxa in lakes. We advise pre-tests prior to the treatment of lakes to define optimal treatment concentrations that kill the majority of the cyanobacteria and to minimize potential side effects on non-target organisms. In some cases, the pre-tests may discourage treatment of the lake.
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Affiliation(s)
- Tim Piel
- Department of Freshwater and Marine Ecology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, P.O. Box 94240,1090 GE Amsterdam, The Netherlands; Agendia NV, 1043 NT Amsterdam, The Netherlands
| | - Giovanni Sandrini
- Department of Freshwater and Marine Ecology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, P.O. Box 94240,1090 GE Amsterdam, The Netherlands; Department of Technology & Sources, Evides Water Company, 3006 AL Rotterdam, The Netherlands
| | - Erik F J Weenink
- Department of Freshwater and Marine Ecology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, P.O. Box 94240,1090 GE Amsterdam, The Netherlands
| | - Hongjie Qin
- Department of Freshwater and Marine Ecology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, P.O. Box 94240,1090 GE Amsterdam, The Netherlands; Guangdong Provincial Key Lab of Ornamental Plant Germplasm Innovation and Utilization, Environmental Horticulture Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China; Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Maria J van Herk
- Department of Freshwater and Marine Ecology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, P.O. Box 94240,1090 GE Amsterdam, The Netherlands
| | - Mariël Léon Morales-Grooters
- Department of Freshwater and Marine Ecology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, P.O. Box 94240,1090 GE Amsterdam, The Netherlands; Department of Biomedical Engineering, Erasmus MC University Rotterdam, Office Ee2302, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands
| | - J Merijn Schuurmans
- Department of Freshwater and Marine Ecology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, P.O. Box 94240,1090 GE Amsterdam, The Netherlands
| | - Pieter C Slot
- Department of Freshwater and Marine Ecology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, P.O. Box 94240,1090 GE Amsterdam, The Netherlands
| | - Geert Wijn
- Arcadis Nederland B.V., P.O. Box 264, 6800 AG Arnhem, The Netherlands
| | - Jasper Arntz
- Arcadis Nederland B.V., P.O. Box 264, 6800 AG Arnhem, The Netherlands
| | - Sevasti-Kiriaki Zervou
- Photo-Catalytic Processes and Environmental Chemistry, Institute of Nanoscience and Nanotechnology, National Centre for Scientific Research, "Demokritos", Patriarchou Gregoriou E & 27 Neapoleos Str, 15341 Athens, Greece
| | - Triantafyllos Kaloudis
- Photo-Catalytic Processes and Environmental Chemistry, Institute of Nanoscience and Nanotechnology, National Centre for Scientific Research, "Demokritos", Patriarchou Gregoriou E & 27 Neapoleos Str, 15341 Athens, Greece; Laboratory of Organic Micropollutants, Water Quality Control Department, Athens Water Supply & Sewerage Company (EYDAP SA), Athens, Greece
| | - Anastasia Hiskia
- Photo-Catalytic Processes and Environmental Chemistry, Institute of Nanoscience and Nanotechnology, National Centre for Scientific Research, "Demokritos", Patriarchou Gregoriou E & 27 Neapoleos Str, 15341 Athens, Greece
| | - Jef Huisman
- Department of Freshwater and Marine Ecology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, P.O. Box 94240,1090 GE Amsterdam, The Netherlands
| | - Petra M Visser
- Department of Freshwater and Marine Ecology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, P.O. Box 94240,1090 GE Amsterdam, The Netherlands
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4
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Yu B, Zhang Y, Wu H, Yan W, Meng Y, Hu C, Liu Z, Ding J, Zhang H. Advanced oxidation processes for synchronizing harmful microcystis blooms control with algal metabolites removal: From the laboratory to practical applications. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 906:167650. [PMID: 37806585 DOI: 10.1016/j.scitotenv.2023.167650] [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: 07/30/2023] [Revised: 10/05/2023] [Accepted: 10/05/2023] [Indexed: 10/10/2023]
Abstract
Harmful algal blooms (HABs) in freshwater systems have become a global epidemic, leading to a series of problems related to cyanobacterial outbreaks and toxicity. Studies are needed to improve the technology used for the simultaneous removal of harmful cyanobacteria and algal metabolites. In this review, widely reported advanced oxidation processes (AOPs) strategies for removing major species Microcystis aeruginosa (M. aeruginosa) and microcystins (MCs) were screened through bibliometrics, such as photocatalysis, activated persulfate, H2O2, Ozone oxidation, ultrasonic oxidation, and electrochemical oxidation, etc. AOPs generate kinds of reactive oxygen species (ROS) to inactivate cyanobacteria and degrade cyanotoxins. A series of responses occurs in algal cells to resist the damaging effects of ROS generated by AOPs. Specifically, we reviewed laboratory research, mechanisms, practical applications, and challenges of HABs treatments in AOPs. Problems common to these technologies include the impact of algal response and metabolites, and environmental factors. This information provides guidance for future research on the removal of harmful cyanobacteria and treatment of algal metabolites using AOPs.
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Affiliation(s)
- Bingzhi Yu
- School of Life and Environmental Sciences, Hangzhou Normal University, 311121 Hangzhou, Zhejiang, China
| | - Yinan Zhang
- School of Life and Environmental Sciences, Hangzhou Normal University, 311121 Hangzhou, Zhejiang, China
| | - Huazhen Wu
- Hangzhou Huanke Environmental Consulting Co. LTD, 310010 Hangzhou, Zhejiang, China
| | - Wen Yan
- School of Life and Environmental Sciences, Hangzhou Normal University, 311121 Hangzhou, Zhejiang, China
| | - Yunjuan Meng
- School of Life and Environmental Sciences, Hangzhou Normal University, 311121 Hangzhou, Zhejiang, China
| | - Chao Hu
- School of Life and Environmental Sciences, Hangzhou Normal University, 311121 Hangzhou, Zhejiang, China
| | - Zhiquan Liu
- School of Engineering, Hangzhou Normal University, 310018 Hangzhou, Zhejiang, China; Zhejiang Provincial Key Laboratory of Urban Wetlands and Regional Change, 311121 Hangzhou, Zhejiang, China
| | - Jiafeng Ding
- School of Engineering, Hangzhou Normal University, 310018 Hangzhou, Zhejiang, China; Zhejiang Provincial Key Laboratory of Urban Wetlands and Regional Change, 311121 Hangzhou, Zhejiang, China.
| | - Hangjun Zhang
- School of Engineering, Hangzhou Normal University, 310018 Hangzhou, Zhejiang, China; Zhejiang Provincial Key Laboratory of Urban Wetlands and Regional Change, 311121 Hangzhou, Zhejiang, China
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5
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Wang X, Luo Y, Zhang S, Zhou L. Acetylacetone effectively controlled the secondary metabolites of Microcystis aeruginosa under simulated sunlight irradiation. J Environ Sci (China) 2024; 135:285-295. [PMID: 37778804 DOI: 10.1016/j.jes.2022.12.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 12/02/2022] [Accepted: 12/03/2022] [Indexed: 10/03/2023]
Abstract
Inactivation of cyanobacterial cells and simultaneous control of secondary metabolites is of significant necessity for the treatment of cyanobacteria-laden water. Acetylacetone (AcAc) has been reported a specific algicide to inactivate Microcystis aeruginosa (M. aeruginosa) and an effective light activator to degrade pollutants. This study systematically investigated the photodegradation ability of AcAc under xenon (Xe) irradiation on the secondary metabolites of M. aeruginosa, mainly algal organic matter (AOM), especially toxic microcystin-LR (MC-LR). Results showed that AcAc outperformed H2O2 in destructing the protein-like substances, humic acid-like matters, aromatic proteins and fulvic-like substances of AOM. For MC-LR (250 µg/L), 0.05 mmol/L AcAc attained the same degradation efficiency (87.0%) as 0.1 mmol/L H2O2. The degradation mechanism of Xe/AcAc might involve photo-induced energy/electron transfer and formation of carbon center radicals. Alkaline conditions (pH > 9.0) were detrimental to the photoactivity of AcAc, corresponding to the observed degradation rate constant (k1 value) of MC-LR drastically decreasing to 0.0013 min-1 as solution pH exceeded 9.0. The PO43- and HCO3- ions had obvious inhibition effects, whereas NO3- slightly improved k1 value from 0.0277 min-1 to 0.0321 min-1. The presence of AOM did not significantly inhibit MC-LR degradation in Xe/AcAc system. In addition, the biological toxicity of MC-LR was greatly reduced after photoreaction. These results demonstrated that AcAc was an alternative algicidal agent to effectively inactivate algal cells and simultaneously control the secondary metabolites after cell lysis. Nevertheless, the concentration and irradiation conditions should be further optimized in practical application.
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Affiliation(s)
- Xiaomeng Wang
- Department of Environmental Engineering, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China.
| | - Yixin Luo
- Department of Environmental Engineering, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Shujuan Zhang
- The State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Lixiang Zhou
- Department of Environmental Engineering, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
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6
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Samadi MT, Rezaie A, Ebrahimi AA, Hossein Panahi A, Kargarian K, Abdipour H. The utility of ultraviolet beam in advanced oxidation-reduction processes: a review on the mechanism of processes and possible production free radicals. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:6628-6648. [PMID: 38153574 DOI: 10.1007/s11356-023-31572-8] [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: 10/03/2023] [Accepted: 12/11/2023] [Indexed: 12/29/2023]
Abstract
Advanced oxidation processes (AOPs) and advanced reduction processes (ARPs) are a set of chemical treatment procedures designed to eliminate organic (sometimes inorganic) contamination in water and wastewater by producing free reactive radicals (FRR). UV irradiation is one of the factors that are effectively used in oxidation-reduction processes. Not only does the UV beam cause the photolysis of contamination, but it also leads to the product of FRR by affecting oxidants-reductant, and the pollutant decomposition occurs by FRR. UV rays produce active radical species indirectly in an advanced redox process by affecting an oxidant (O3, H2O2), persulfate (PS), or reducer (dithionite, sulfite, sulfide, iodide, ferrous). Produced FRR with high redox potential (including oxidized or reduced radicals) causes detoxification and degradation of target contaminants by attacking them. In this review, it was found that ultraviolet radiation is one of the important and practical parameters in redox processes, which can be used to control a wide range of impurities.
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Affiliation(s)
- Mohammad Taghi Samadi
- Research Center for Health Sciences, Department of Environmental Health Engineering, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Arezo Rezaie
- Student Research Committee, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Ali Asghar Ebrahimi
- Environmental Science and Technology Research Center, Department of Environmental Health, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Ayat Hossein Panahi
- Student Research Committee, Department of Environmental Health Engineering, Hamadan University of Medical Sciences, Hamadan, Iran.
| | - Kiana Kargarian
- Student Research Committee, Department of Environmental Health Engineering, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Hossein Abdipour
- Student Research Committee, Department of Environmental Health Engineering, Hamadan University of Medical Sciences, Hamadan, Iran
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7
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Qin H, Sandrini G, Piel T, Slot PC, Huisman J, Visser PM. The harmful cyanobacterium Microcystis aeruginosa PCC7806 is more resistant to hydrogen peroxide at elevated CO 2. HARMFUL ALGAE 2023; 128:102482. [PMID: 37714576 DOI: 10.1016/j.hal.2023.102482] [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: 03/01/2023] [Revised: 07/28/2023] [Accepted: 07/28/2023] [Indexed: 09/17/2023]
Abstract
Rising atmospheric CO2 can intensify harmful cyanobacterial blooms in eutrophic lakes. Worldwide, these blooms are an increasing environmental concern. Low concentrations of hydrogen peroxide (H2O2) have been proposed as a short-term but eco-friendly approach to selectively mitigate cyanobacterial blooms. However, sensitivity of cyanobacteria to H2O2 can vary depending on the available resources. To find out how cyanobacteria respond to H2O2 under elevated CO2, Microcystis aeruginosa PCC 7806 was cultured in chemostats with nutrient-replete medium under C-limiting and C-replete conditions (150 ppm and 1500 ppm CO2, respectively). Microcystis chemostats exposed to high CO2 showed higher cell densities, biovolumes, and microcystin contents, but a lower photosynthetic efficiency and pH compared to the cultures grown under low CO2. Subsamples of the chemostats were treated with different concentrations of H2O2 (0-10 mg·L-1 H2O2) in batch cultures under two different light intensities (15 and 100 μmol photons m-2·s-1) and the response in photosynthetic vitality was monitored during 24 h. Results showed that Microcystis was more resistant to H2O2 at elevated CO2 than under carbon-limited conditions. Both low and high CO2-adapted cells were more sensitive to H2O2 at high light than at low light. Microcystins (MCs) leaked out of the cells of cultures exposed to 2-10 mg·L-1 H2O2, while the sum of intra- and extracellular MCs decreased. Although both H2O2 and CO2 concentrations in lakes vary in response to many factors, these results imply that it may become more difficult to suppress cyanobacterial blooms in eutrophic lakes when atmospheric CO2 concentrations continue to rise.
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Affiliation(s)
- Hongjie Qin
- Guangdong Provincial Key Lab of Ornamental Plant Germplasm Innovation and Utilization, Environmental Horticulture Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China; Department of Freshwater and Marine Ecology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, PO Box 94240, 1090 GE Amsterdam, The Netherlands; Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China
| | - Giovanni Sandrini
- Department of Freshwater and Marine Ecology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, PO Box 94240, 1090 GE Amsterdam, The Netherlands; Department of Technology & Sources, Evides Water Company, Rotterdam, The Netherlands
| | - Tim Piel
- Department of Freshwater and Marine Ecology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, PO Box 94240, 1090 GE Amsterdam, The Netherlands
| | - Pieter C Slot
- Department of Freshwater and Marine Ecology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, PO Box 94240, 1090 GE Amsterdam, The Netherlands
| | - Jef Huisman
- Department of Freshwater and Marine Ecology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, PO Box 94240, 1090 GE Amsterdam, The Netherlands
| | - Petra M Visser
- Department of Freshwater and Marine Ecology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, PO Box 94240, 1090 GE Amsterdam, The Netherlands.
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8
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Zhang L, Tang S, Jiang S. Immobilization of Microcystin by the Hydrogel-Biochar Composite to Enhance Biodegradation during Drinking Water Treatment. ACS ES&T WATER 2023; 3:3044-3056. [PMID: 37705994 PMCID: PMC10496130 DOI: 10.1021/acsestwater.3c00240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Revised: 08/17/2023] [Accepted: 08/18/2023] [Indexed: 09/15/2023]
Abstract
Microcystin-LR (MC-LR), the most common algal toxin in freshwater, poses an escalating threat to safe drinking water. This study aims to develop an engineered biofiltration system for water treatment, employing a composite of poly(diallyldimethylammonium chloride)-biochar (PDDA-BC) as a filtration medium. The objective is to capture MC-LR selectively and quickly from water, enabling subsequent biodegradation of toxin by bacteria embedded on the composite. The results showed that PDDA-BC exhibited a high selectivity in adsorbing MC-LR, even in the presence of competing natural organic matter and anions. The adsorption kinetics of MC-LR was faster, and capacity was greater compared to traditional adsorbents, achieving a capture rate of 98% for MC-LR (200 μg/L) within minutes to tens of minutes. Notably, the efficient adsorption of MC-LR was also observed in natural lake waters, underscoring the substantial potential of PDDA-BC for immobilizing MC-LR during biofiltration. Density functional theory calculations revealed that the synergetic effects of electrostatic interaction and π-π stacking predominantly contribute to the adsorption selectivity of MC-LR. Furthermore, experimental results validated that the combination of PDDA-BC with MC-degrading bacteria offered a promising and effective approach to achieve a sustainable removal of MC-LR through an "adsorption-biodegradation" process.
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Affiliation(s)
- Lixun Zhang
- Department of Civil and Environmental
Engineering, University of California, Irvine, California 92697, United States
| | - Shengyin Tang
- Department of Civil and Environmental
Engineering, University of California, Irvine, California 92697, United States
| | - Sunny Jiang
- Department of Civil and Environmental
Engineering, University of California, Irvine, California 92697, United States
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9
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Folcik A, Ruggles SA, Pillai SD. Applicability of Electron Beam Technology for the Degradation of Microcystin-LR in Surface Waters. ACS OMEGA 2023; 8:12664-12670. [PMID: 37065074 PMCID: PMC10099444 DOI: 10.1021/acsomega.2c07448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 03/16/2023] [Indexed: 06/19/2023]
Abstract
Studies were performed to investigate the effects of surface water quality parameters on the degradation of microcystin-LR (MC-LR) using high-energy electron beam (eBeam) technology. Surface water samples were collected across different geographic locations in the United States. Water quality parameters including pH, alkalinity, TDS, and dissolved oxygen were measured in all samples. Degradation of MC-LR in all samples, regardless of parameter concentrations, was above 99%. The effect of natural organic matter (NOM) on MC-LR degradation was also investigated in the presence of fulvic acid. Similarly, the degradation efficiency of MC-LR exceeded 99% for all concentrations of fulvic acid at 5 kGy. This study suggests that surface water quality has a negligible effect on the degradation of MC-LR via eBeam treatment. The results indicate that eBeam technology is a promising technique for the treatment of water contaminated with microcystins.
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Affiliation(s)
- Alexandra
M. Folcik
- Interdisciplinary
Faculty of Toxicology, Texas A&M University, College Station, Texas 77843, United States
- Exponent, Maynard, Massachusetts 01754, United States
| | - Shelby A. Ruggles
- Department
of Food Science and Technology, Texas A&M
University, College Station, Texas 77843, United States
| | - Suresh D. Pillai
- Interdisciplinary
Faculty of Toxicology, Texas A&M University, College Station, Texas 77843, United States
- Department
of Food Science and Technology, Texas A&M
University, College Station, Texas 77843, United States
- National
Center for Electron Beam Research, an IAEA Collaborating Centre for
Electron Beam Technology, College
Station, Texas 77845, United States
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10
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Allabakshi SM, Srikar PSNSR, Gomosta S, Gangwar RK, Maliyekkal SM. UV-C photon integrated surface dielectric barrier discharge hybrid reactor: A novel and energy-efficient route for rapid mineralisation of aqueous azo dyes. JOURNAL OF HAZARDOUS MATERIALS 2023; 446:130639. [PMID: 36586337 DOI: 10.1016/j.jhazmat.2022.130639] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 12/05/2022] [Accepted: 12/18/2022] [Indexed: 06/17/2023]
Abstract
The study describes developing an energy-efficient and scalable alternative to conventional non-thermal plasma systems by integrating surface dielectric barrier discharge (SDBD) and UV-C radiation sources. The unprecedented enhancement in the mineralisation rate of an azo dye (brilliant red 5B) by the hybrid reactor (photo-SDBD) is demonstrated thoroughly as a function of dye concentrations, pH, and background salts. The photo-SDBD is 1.25 - 4.9 times more energy efficient than SDBD under similar experimental conditions. The photo-SDBD could overcome the problems such as the recombination of hydroxyl radicals and scavenging of radicals by salts (NaCl, Na2SO4, Na2CO3) observed in conventional non-thermal plasma systems. The TOC and HR-MS analysis establish the complete mineralisation potential and chemical mineralisation pathway. Besides, the phytotoxicity of the treated water is tested and demonstrated its utility as a liquid fertiliser for enhanced germination of mung bean seeds. The optical emission spectroscopy measurements were performed to estimate the plasma's electron temperature (1.6 ± 0.2 eV) and density (1021/m3). The emission line ratio (I763.5/I738.3) approach is used to compare the influence of UV-C on plasma parameters in the SDBD reactor. The study opens a new pathway for developing energy-efficient and scalable plasma-assisted mineralisation of complex and emerging organic pollutants.
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Affiliation(s)
- Shaik Mahamad Allabakshi
- Department of Civil and Environmental Engineering, Indian Institute of Technology Tirupati, Yerpedu 517619, India
| | - P S N S R Srikar
- Department of Physics & CAMOST, Indian Institute of Technology Tirupati, Yerpedu 517619, India
| | - Suman Gomosta
- Department of Civil and Environmental Engineering, Indian Institute of Technology Tirupati, Yerpedu 517619, India
| | - Reetesh Kumar Gangwar
- Department of Physics & CAMOST, Indian Institute of Technology Tirupati, Yerpedu 517619, India.
| | - Shihabudheen M Maliyekkal
- Department of Civil and Environmental Engineering, Indian Institute of Technology Tirupati, Yerpedu 517619, India.
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11
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Türk OK, Adalar G, Yazici Guvenc S, Can-Güven E, Varank G, Demir A. Photodegradation of oxytetracycline by UV-assisted persulfate and percarbonate processes: kinetics, influencing factors, anion effect, and radical species. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:869-883. [PMID: 35904739 DOI: 10.1007/s11356-022-22229-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 07/22/2022] [Indexed: 06/15/2023]
Abstract
In this study, the performance of ultraviolet (UV)-assisted persulfate (PS) and percarbonate (PC) oxidation processes in oxytetracycline (OTC) removal was investigated. UVC lamps were used for the photolysis process and the effect of operating parameters (initial pH, oxidant dose, initial OTC concentration, UV intensity) on OTC removal efficiency was determined. Control experiments were carried out at pH 5.5 and 32 W UV power for 60 min by adding a 4 mM oxidant with 10 mg/L initial OTC concentration. The OTC removal efficiency obtained as a result of only photolysis was 17.3% and the removal efficiency obtained by PS and PC oxidation alone was 18.3% and 12.7%, respectively. The OTC removal efficiencies increased in the combined processes and reached 58.1% and 69.9% for the UV-PS and UV-PC processes, respectively. The reaction rates of the processes were ranked as UV-PC > UV-PS > PS > UV > PC. In the UV-PS and UV-PC processes, the highest removal efficiencies were achieved at alkaline pH values. The OTC removal efficiency was increased with the increase in oxidant dose; however, the efficiency decreased after a certain dose due to the scavenging effect. The removal efficiency also increased as the initial OTC concentration decreased. The UV intensity had a positive effect on OTC removal efficiency. The effect of the water matrix on OTC removal efficiency was investigated while the dominant radical types were determined in UV-assisted processes. The EE/O values for the UV-PS and UV-PC processes were calculated as 211 kWh/m3 and 153 kWh/m3, respectively for 60 min of reaction time. Although similar removal efficiencies were obtained with both UV-assisted processes, the UV-PC process steps forward in terms of being a novel, environmentally friendly, more economic, and promising technology for OTC removal.
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Affiliation(s)
- Oruç Kaan Türk
- Faculty of Civil Engineering, Department of Environmental Engineering, Yildiz Technical University, Esenler, Instanbul, 34220, Turkey
| | - Gizem Adalar
- Faculty of Civil Engineering, Department of Environmental Engineering, Yildiz Technical University, Esenler, Instanbul, 34220, Turkey
| | - Senem Yazici Guvenc
- Faculty of Civil Engineering, Department of Environmental Engineering, Yildiz Technical University, Esenler, Instanbul, 34220, Turkey.
| | - Emine Can-Güven
- Faculty of Civil Engineering, Department of Environmental Engineering, Yildiz Technical University, Esenler, Instanbul, 34220, Turkey
| | - Gamze Varank
- Faculty of Civil Engineering, Department of Environmental Engineering, Yildiz Technical University, Esenler, Instanbul, 34220, Turkey
| | - Ahmet Demir
- Faculty of Civil Engineering, Department of Environmental Engineering, Yildiz Technical University, Esenler, Instanbul, 34220, Turkey
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12
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Naimi-Joubani M, Ayagh K, Tahergorabi M, Shirzad-Siboni M, Yang JK. Design and modeling of diazinon degradation in hydrous matrix by Ni-doped ZnO nanorods under ultrasonic irradiation: process optimization using RSM (CCD), kinetic study, reaction pathway, mineralization, and toxicity assessment. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:3527-3548. [PMID: 35947265 DOI: 10.1007/s11356-022-21861-z] [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: 01/04/2022] [Accepted: 07/01/2022] [Indexed: 06/15/2023]
Abstract
In first, the Ni-doped ZnO nanorods used as an appeal sonocatalyst was synthesized through co-precipitation method. Afterwards, the crystalline structure, functional groups, surface morphology, and elemental composition were characterized by a set of analysis. Removal of diazinon ((DZ) as a renowned pesticide) was investigated using sonocatalytic performance of US/Ni-doped ZnO system. In this empirical study, response surface methodology (RSM) based central composite design (CCD) was applied for optimization of operational factors. Under the optimum conditions such as initial pH = 5, initial DZ concentration = 15 mg L-1, sonocatalyst dosage = 1 g L-1, and in the presence of organic compounds (oxalic acid, humic acid, and folic acid) = 3 mg L-1, the sonocatalytic degradation of DZ after 15 min was 82.29%. The F-value (6.64) and P-value (< 0.0001) for DZ degradation in the quadratic model imply the proposed model was significant. A-factor (pH) considers as a prominent factor owing to having the highest F-value. In addition, the sonocatalytic data in this study exhibited valid fitting for the first order kinetic model (R2 > 0.98). After six consecutive cycles, the Ni-doped ZnO nanorods could be recyclable for sonocatalytic degradation of DZ. The five main compounds produced during the US/Ni-doped ZnO embracing 2-isopropyl-6-methyl-4-pyrimidinol (IMP), diethyl phosphonate, diazoxon, hydroxyldiazinon, and diazinon methyl ketone are formed in the path of DZ degradation. OFAT style also revealed 99.99% of DZ degradation with 73.26% of mineralization rate in optimum status. The Ni-doped ZnO presented agreeable sonocatalytic facility in the refinement of real water and wastewater matrix. Finally, the results of toxicity evaluation (Daphnia magna) in the sonocatalytic degradation of DZ (by US/Ni-doped ZnO system) showed that the toxicity of the DZ solution lessened under US waves (LC50 and TU 48 h equal to 36.472 and 2.741 volume percent, respectively).
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Affiliation(s)
- Mohammad Naimi-Joubani
- Research Center of Health and Environment, Guilan University of Medical Sciences, Rasht, Iran
- Department of Environmental Health Engineering, School of Health, Guilan University of Medical Sciences, Rasht, Iran
| | - Kobra Ayagh
- Department of Environmental Health Engineering, School of Health, Guilan University of Medical Sciences, Rasht, Iran
| | - Mahsa Tahergorabi
- Department of Environmental Health Engineering, Sirjan School of Medical Sciences, Sirjan, Iran
| | - Mehdi Shirzad-Siboni
- Research Center of Health and Environment, Guilan University of Medical Sciences, Rasht, Iran.
- Department of Environmental Health Engineering, School of Health, Guilan University of Medical Sciences, Rasht, Iran.
| | - Jae- Kyu Yang
- Department of Environmental Engineering, Kwangwoon University, Seoul, Korea
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13
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Ma X, Chen J, Liu B, Huang Y, Tang Y, Wei Q. Removal of Microcystis aeruginosa and microcystin-LR by UV/Fenton system: characteristics and degradation pathways. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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14
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Yan B, Wang S, Liu Z, Wang D, Shi W, Cui F. Degradation mechanisms of cyanobacteria neurotoxin β-N-methylamino-l-alanine (BMAA) during UV 254/H 2O 2 process: Kinetics and pathways. CHEMOSPHERE 2022; 302:134939. [PMID: 35561764 DOI: 10.1016/j.chemosphere.2022.134939] [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: 10/04/2021] [Revised: 05/03/2022] [Accepted: 05/08/2022] [Indexed: 06/15/2023]
Abstract
In this work, the UV254/H2O2 process was utilized to remove β-N-methylamino-l-alanine (BMAA), a kind of cyanobacteria neurotoxin, and the influence of reaction parameters and environmental factors on the degradation of BMAA has been systematically investigated. The results showed that BMAA could be effectively removed in the UV254/H2O2 system compared to UV or H2O2 alone and OH was confirmed as the main ROS to degrade BMAA. The degradation rate of BMAA increased first and then decreased with the increase of pH and the maximum kobs was 0.1545 min-1 obtained at pH 9. The removal of BMAA in the UV254/H2O2 system was inhibited in actual water, while the degradation rate of BMAA in actual water could still exceed 90% by appropriately extending the reaction time. The decrease in the degradation efficiency of BMAA in actual water was primarily due to the ultraviolet light absorption and competition effects of NOM, and anions (Cl- and HCO3-) would also inhibit the degradation of BMAA. Five by-products ([M - H]- = 118, 103, 88, 87 and 59) were identified in this study and the degradation pathways of BMAA were proposed. The production of by-products was attributed to the fracture of the C-N bond and hydroxylation reaction. This study is worthwhile to deepen the understanding of the degradation mechanism of BMAA in the UV254/H2O2 system.
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Affiliation(s)
- Boyin Yan
- College of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China
| | - Songxue Wang
- College of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China
| | - Zhiquan Liu
- Institute of Environmental Research at Greater Bay, Key Laboratory by Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou, 510006, China.
| | - Da Wang
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of an Environment, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Wenxin Shi
- School of Environment and Ecology, Chongqing University, Chongqing, 400044, China
| | - Fuyi Cui
- School of Environment and Ecology, Chongqing University, Chongqing, 400044, China
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15
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Song J, Zhao J, Yang C, Liu Y, Yang J, Qi X, Li Z, Shao Z, Wang S, Ji M, Zhai H, Chen Z, Liu W, Li X. Integrated estrogenic effects and semi-volatile organic pollutants profile in secondary and tertiary wastewater treatment effluents in North China. JOURNAL OF HAZARDOUS MATERIALS 2022; 435:128984. [PMID: 35483267 DOI: 10.1016/j.jhazmat.2022.128984] [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: 12/14/2021] [Revised: 04/16/2022] [Accepted: 04/18/2022] [Indexed: 06/14/2023]
Abstract
Endocrine-disrupting effects on aquatic organisms caused by wastewater discharging have raised extensive concerns. However, the efficiency of various wastewater treatment processes to remove estrogenic activity in effluents and the association with organic micropollutants was not well known. We evaluated the estrogenic activity using a well-characterized in vivo bioassay featuring the Chinese rare minnows (Gobiocypris rarus) and analyzed 886 semi-volatile organic compounds (SVOCs) in effluents from four secondary wastewater treatment plants (SWTP A-D) and a tertiary wastewater treatment plant (TTP E) that utilized various common treatment processes in northern China. The final effluents from SWTPs and TTP E all exhibited estrogenic effects, increasing male fish plasma vitellogenin (VTG) contents and estradiol/testosterone (E2/T) ratios. Key regulating genes in the male fish liver including vtg1, vtg3, era, erβ, and cyp19a were upregulated. TTP E demonstrated high performance in reducing estrogenic activity in the effluents, with a reduction of 64% in integrative biomarkers of estrogenic response (IBR). UV disinfection at SWTPs removed IBR by 14%- 33%, while ozone disinfection at TTP E did not reduce IBR. Several SVOCs including alkanes, chlorobenzenes, and phthalates, detected at ng/L to µg/L level, significantly correlated with effluent estrogenic activity. Our findings suggest the necessity and the potential means to improve the efficiency of current wastewater treatment approaches to achieve better protection for aquatic organisms against the joint effects of mixtures of various categories of micropollutants in effluents.
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Affiliation(s)
- Jingyang Song
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Jing Zhao
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Chen Yang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Yixin Liu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Jing Yang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Xiaojuan Qi
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Zechang Li
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Zheng Shao
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Siyu Wang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Min Ji
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Hongyan Zhai
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Zhiqiang Chen
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin 150090, China
| | - Wei Liu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
| | - Xuehua Li
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
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16
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Hou M, Li X, Fu Y, Wang L, Lin D, Wang Z. Degradation of iodinated X-ray contrast media by advanced oxidation processes: A literature review with a focus on degradation pathways. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.08.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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17
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Jafari N, Abdolahnejad A, Behnami A, Mohammadi A, Fanaei F, Ebrahimi A. Evaluation of microcystin-LR photocatalytic degradation in aqueous solutions by BiVO 4/NaY-Zeolite nanocomposite: determination of optimum conditions by response surface methodology (RSM). TOXIN REV 2022. [DOI: 10.1080/15569543.2021.1916951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Negar Jafari
- Environment Research Center, Research Institute for Primordial Prevention of Non-communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran
- Department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Ali Abdolahnejad
- Department of Environmental Health Engineering, Maragheh University of Medical Sciences, Maragheh, Iran
| | - Ali Behnami
- Department of Environmental Health Engineering, Maragheh University of Medical Sciences, Maragheh, Iran
| | - Amir Mohammadi
- Department of Environmental Health Engineering, Maragheh University of Medical Sciences, Maragheh, Iran
| | - Farzad Fanaei
- Department of Environmental Health Engineering, Iran University of Medical Sciences, Tehran, Iran
| | - Afshin Ebrahimi
- Environment Research Center, Research Institute for Primordial Prevention of Non-communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran
- Department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran
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18
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Huang J, Ghaly M, Hobson P, Chow CWK. Innovative method of utilising hydrogen peroxide for source water management of cyanobacteria. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:22651-22660. [PMID: 34792766 DOI: 10.1007/s11356-021-17511-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Accepted: 11/09/2021] [Indexed: 06/13/2023]
Abstract
The treatment and control of cyanobacterial blooms using copper-based algaecides in water reservoirs have historically been used; however, due to the adverse impact of copper on the environment, water authorities have been researching and studying new and innovative ways to control cyanobacterial blooms. Hydrogen peroxide has been investigated as an environmentally friendly alternative, and this research aims to determine the impact of water quality on its effectiveness based on the decay characteristics in different water samples. Natural water samples from South Australian reservoirs and river were used to evaluate hydrogen peroxide decomposition and provide a better strategy for water operators in using it as an algaecide. Our experiments show the dependency of hydrogen peroxide decomposition not only on water quality but also on the initial hydrogen peroxide dose. A higher initial hydrogen peroxide dose can trigger the increase of pH, leading to increased consumption of hydrogen peroxide. In addition, the hydrogen peroxide decomposition is significantly accelerated with the rise of copper concentration in water samples. Moreover, it is found that UV light can also affect the decomposition rate of hydrogen peroxide. The hydrogen peroxide decay is more significant under UV light for the samples with lower hydrogen peroxide concentrations. Our study also shows the impact of dissolved organic carbon (DOC) on hydrogen peroxide decomposition is not substantial. The study also presents a modelling method to optimise hydrogen peroxide application based on water quality characteristics. Our findings can provide knowledge for the water industry to produce a suitable model which can be used to optimise the application of hydrogen peroxide for the control of cyanobacteria.
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Affiliation(s)
- Jianyin Huang
- Scarce Resources and Circular Economy (ScaRCE), UniSA STEM, University of South Australia, Mawson Lakes, SA, 5095, Australia
- Future Industries Institute, University of South Australia, Adelaide, SA, 5095, Australia
| | - Maximus Ghaly
- Scarce Resources and Circular Economy (ScaRCE), UniSA STEM, University of South Australia, Mawson Lakes, SA, 5095, Australia
| | - Peter Hobson
- South Australian Water Corporation, Adelaide, SA, 5000, Australia
| | - Christopher W K Chow
- Scarce Resources and Circular Economy (ScaRCE), UniSA STEM, University of South Australia, Mawson Lakes, SA, 5095, Australia.
- Future Industries Institute, University of South Australia, Adelaide, SA, 5095, Australia.
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19
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Almuhtaram H, Hofmann R. Evaluation of ultraviolet/peracetic acid to degrade M. aeruginosa and microcystins -LR and -RR. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127357. [PMID: 34687995 DOI: 10.1016/j.jhazmat.2021.127357] [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: 07/12/2021] [Revised: 09/23/2021] [Accepted: 09/24/2021] [Indexed: 06/13/2023]
Abstract
The reactivity of peracetic acid (PAA) alone, and PAA exposed to ultraviolet radiation (UV), was investigated on Microcystis aeruginosa cells, and on microcystin-LR and -RR. Reaction rates between PAA and MC-LR (k = 3.46 M-1 s-1) and MC-RR (k = 2.67 M-1 s-1) were determined in an unbuffered acidic solution, and they are approximately 35-45 times lower than a previously reported reaction rate between MC-LR and chlorine at pH 6. Peracetic acid reacted with M. aeruginosa cells as a function of PAA and cell concentrations, with 10 mg/L PAA resulting in 1-log reduction of total MC-LR within 15 min. Advanced oxidation by UV/PAA readily degraded MC-LR and MC-RR, outperforming UV/H2O2 at pH 7.7 by > 50% on an equimolar basis. Indirect photolysis at this pH is due to •OH and organic radicals, as determined by trials in the presence of excess tert-butanol to scavenge •OH. The process is less effective when the pH departs from neutral conditions (5.9 or 10.6) due to the decreased effects of both radicals. These findings suggest that PAA alone might be a viable option for cyanobacteria and microcystins control in preoxidation applications and that UV/PAA is an effective process for degrading MC-LR and MC-RR at neutral pH.
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Affiliation(s)
- Husein Almuhtaram
- Department of Civil and Mineral Engineering, University of Toronto, Toronto, ON M5S 1A4, Canada.
| | - Ron Hofmann
- Department of Civil and Mineral Engineering, University of Toronto, Toronto, ON M5S 1A4, Canada
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20
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TiCl3 coagulation for algae-laden water treatment: Performance, control of algal organic matters release and mechanism. KOREAN J CHEM ENG 2022. [DOI: 10.1007/s11814-021-0993-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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21
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Abdallah MF, Van Hassel WHR, Andjelkovic M, Wilmotte A, Rajkovic A. Cyanotoxins and Food Contamination in Developing Countries: Review of Their Types, Toxicity, Analysis, Occurrence and Mitigation Strategies. Toxins (Basel) 2021; 13:786. [PMID: 34822570 PMCID: PMC8619289 DOI: 10.3390/toxins13110786] [Citation(s) in RCA: 8] [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: 10/14/2021] [Revised: 10/29/2021] [Accepted: 11/02/2021] [Indexed: 12/27/2022] Open
Abstract
Cyanotoxins have gained global public interest due to their potential to bioaccumulate in food, which threatens human health. Bloom formation is usually enhanced under Mediterranean, subtropical and tropical climates which are the dominant climate types in developing countries. In this context, we present an up-to-date overview of cyanotoxins (types, toxic effects, analysis, occurrence, and mitigation) with a special focus on their contamination in (sea)food from all the developing countries in Africa, Asia, and Latin America as this has received less attention. A total of 65 publications have been found (from 2000 until October 2021) reporting the contamination by one or more cyanotoxins in seafood and edible plants (five papers). Only Brazil and China conducted more research on cyanotoxin contamination in food in comparison to other countries. The majority of research focused on the detection of microcystins using different analytical methods. The detected levels mostly surpassed the provisional tolerable daily intake limit set by the World Health Organization, indicating a real risk to the exposed population. Assessment of cyanotoxin contamination in foods from developing countries still requires further investigations by conducting more survey studies, especially the simultaneous detection of multiple categories of cyanotoxins in food.
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Affiliation(s)
- Mohamed F. Abdallah
- Department of Food Technology, Safety and Health, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium;
| | - Wannes H. R. Van Hassel
- Sciensano, Chemical and Physical Health Risks, Organic Contaminants and Additives, Leuvensesteenweg 17, 3080 Tervuren, Belgium;
| | - Mirjana Andjelkovic
- Sciensano Research Institute, Chemical and Physical Health Risks, Risk and Health Impact Assessment, Ju-liette Wytsmanstreet 14, 1050 Brussels, Belgium;
| | - Annick Wilmotte
- BCCM/ULC Cyanobacteria Collection, InBios-Centre for Protein Engineering, Université de Liège, 4000 Liège, Belgium;
| | - Andreja Rajkovic
- Department of Food Technology, Safety and Health, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium;
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22
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Wang S, Jiao Y, Rao Z. Selective removal of common cyanotoxins: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:28865-28875. [PMID: 33842999 DOI: 10.1007/s11356-021-13798-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Accepted: 03/31/2021] [Indexed: 06/12/2023]
Abstract
The development of cyanobacterial blooms can have adverse effects on water bodies and may produce cyanotoxins. Several physical and chemical methods have been applied to remove cyanotoxins, but they have been significantly challenged due to extensive energy footprint and over-used chemicals, which limits practical application on a large scale. Selective removal has been regarded as the most promising approach recently for the elimination of prevalent and major bloom-forming cyanotoxins (e.g., microcystins and cylindrospermopsin) as natural organic matters and radical scavengers are ineluctably present in real scenarios. This paper reviews current advancements in research on selective oxidation and adsorption of cyanotoxins. Its goal is to provide comprehensive information on the treatment mechanism and the process feasibility involved in the cyanotoxin removal from real-world waters. Moreover, perspectives of cyanotoxin control and in situ selective elimination approaches are also reviewed. It is expected that the information gathered and discussed in this review can provide a useful and novel reference and direction for future pilot-scale applications.
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Affiliation(s)
- Shulian Wang
- Hubei Key Laboratory of Ecological Remediation for Rivers-Lakes and Algal Utilization, School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, 430068, China
| | - Yiying Jiao
- Hubei Key Laboratory of Ecological Remediation for Rivers-Lakes and Algal Utilization, School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, 430068, China
| | - Zhi Rao
- Hubei Key Laboratory of Ecological Remediation for Rivers-Lakes and Algal Utilization, School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, 430068, China.
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23
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Zeng S, Kan E. Adsorption and regeneration on iron-activated biochar for removal of microcystin-LR. CHEMOSPHERE 2021; 273:129649. [PMID: 33497982 DOI: 10.1016/j.chemosphere.2021.129649] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Revised: 01/08/2021] [Accepted: 01/12/2021] [Indexed: 06/12/2023]
Abstract
Novel iron activated biochars (FA-BCs) were prepared via simultaneous pyrolysis and activation of FeCl3-pretreated bermudagrass (BG) for removing microcystin-LR (MC-LR) in aqueous solution. Compared to the raw BC (without activation), the surface area and adsorption capacity of FA-BC at iron impregnation ratio of 2 (2 g FeCl3/g BG) were enhanced from 86 m2/g and 0.76 mg/g to 835 m2/g and 9.00 mg/g. Moreover, FA-BC possessed various iron oxides at its surface which provided the catalytic capacity for regeneration of MC-LR spent FA-BC and magnetic separation after the MC-LR adsorption. Possible mechanisms for the MC-LR adsorption onto FA-BC would include electrostatic attraction, π+-π, hydrogen bond, and hydrophobic interactions. The detailed adsorption studies indicated mainly chemisorption and intra-particle diffusion limitation would participate in the adsorption process. The thermal regeneration at 300 °C kept high regeneration efficiency (99-100%) for the MC-LR spent FA-BC during four cycles of adsorption-regeneration. In addition, the high regeneration efficiency (close to 100%) was also achieved by persulfate oxidation-driven regeneration. FA-BC also exhibited high adsorption capacity for the MC-LR from the real lake water to meet the MC-LR concentration below 1 μg/L as a safe guideline suggested by WHO.
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Affiliation(s)
- Shengquan Zeng
- Department of Biological and Agricultural Engineering & Texas A&M AgriLife Research Center, Texas A&M University, TX, 77843, USA
| | - Eunsung Kan
- Department of Biological and Agricultural Engineering & Texas A&M AgriLife Research Center, Texas A&M University, TX, 77843, USA; Department of Wildlife, Sustainability, and Ecosystem Sciences, Tarleton State University, TX, 76401, USA.
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24
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Sun Q, Wu S, Yin R, Bai X, Bhunia AK, Liu C, Zheng Y, Wang F, Blatchley ER. Effects of fulvic acid size on microcystin-LR photodegradation and detoxification in the chlorine/UV process. WATER RESEARCH 2021; 193:116893. [PMID: 33582494 DOI: 10.1016/j.watres.2021.116893] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Revised: 01/29/2021] [Accepted: 01/31/2021] [Indexed: 06/12/2023]
Abstract
Microcystin-LR (MC-LR), a polypeptide toxin generated by cyanobacteria, threatens the safety of drinking water supplies. In this study, fulvic acid (FA) was separated into two molecular weight (MW) ranges to evaluate the effects of FA size on MC-LR degradation in the chlorine/UV process. The rates of MC-LR degradation were significantly reduced in FA-containing water (3.7 × 10-3 s-1 for small MW FA; 4.3 × 10-3 s-1 for large MW FA) as compared with FA free water (4.9 × 10-3 s-1). The contributions of ClO• to MC-LR degradation were dramatically lower in small MW FA water (0.4%) than large MW FA (13.9%) and FA free water (17.4%), suggesting inhibition by lignin-like substances in FA in the transformation of Cl• to ClO• and scavenging ClO•. Monochlorination and hydroxylation occurred in the first step of the MC-LR degradation process. The accumulation of intermediate products in the chlorine/UV process indicated that small MW FA inhibited further degradation of MC-LR. Small MW FA, rather than MC-LR degradation, was the dominant factor in minimizing MC-LR cytotoxicity toward a human intestinal epithelial cell line.
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Affiliation(s)
- Qiyuan Sun
- College of Environmental Science and Engineering, Fujian Normal University, Fuzhou, Fujian, 350007, China; Lyles School of Civil Engineering, Purdue University, West Lafayette, IN, 47907, United States; Fujian Key Laboratory of Pollution Control & Resource Reuse, Fuzhou, Fujian, 350007, China
| | - Shanbin Wu
- College of Environmental Science and Engineering, Fujian Normal University, Fuzhou, Fujian, 350007, China
| | - Ran Yin
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Xingjian Bai
- Molecular Food Microbiology Laboratory, Department of Food Science, Purdue University, West Lafayette, IN, 47907, United States
| | - Arun K Bhunia
- Molecular Food Microbiology Laboratory, Department of Food Science, Purdue University, West Lafayette, IN, 47907, United States
| | - Changqing Liu
- College of Environmental Science and Engineering, Fujian Normal University, Fuzhou, Fujian, 350007, China; Fujian Key Laboratory of Pollution Control & Resource Reuse, Fuzhou, Fujian, 350007, China
| | - Yuyi Zheng
- College of Environmental Science and Engineering, Fujian Normal University, Fuzhou, Fujian, 350007, China; Fujian Key Laboratory of Pollution Control & Resource Reuse, Fuzhou, Fujian, 350007, China
| | - Feifeng Wang
- College of Environmental Science and Engineering, Fujian Normal University, Fuzhou, Fujian, 350007, China; Fujian Key Laboratory of Pollution Control & Resource Reuse, Fuzhou, Fujian, 350007, China.
| | - Ernest R Blatchley
- Lyles School of Civil Engineering, Purdue University, West Lafayette, IN, 47907, United States; Division of Environmental & Ecological Engineering, Purdue University, West Lafayette, IN, 47907, United States.
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25
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Munoz M, Cirés S, de Pedro ZM, Colina JÁ, Velásquez-Figueroa Y, Carmona-Jiménez J, Caro-Borrero A, Salazar A, Santa María Fuster MC, Contreras D, Perona E, Quesada A, Casas JA. Overview of toxic cyanobacteria and cyanotoxins in Ibero-American freshwaters: Challenges for risk management and opportunities for removal by advanced technologies. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 761:143197. [PMID: 33160675 DOI: 10.1016/j.scitotenv.2020.143197] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 09/04/2020] [Accepted: 10/16/2020] [Indexed: 06/11/2023]
Abstract
The increasing occurrence of cyanobacterial blooms worldwide represents an important threat for both the environment and public health. In this context, the development of risk analysis and management tools as well as sustainable and cost-effective treatment processes is essential. The research project TALGENTOX, funded by the Ibero-American Science and Technology Program for Development (CYTED-2019), aims to address this ambitious challenge in countries with different environmental and social conditions within the Ibero-American context. It is based on a multidisciplinary approach that combines ecology, water management and technology fields, and includes research groups from Chile, Colombia, Mexico, Peru and Spain. In this review, the occurrence of toxic cyanobacteria and cyanotoxins in freshwaters from these countries are summarized. The presence of cyanotoxins has been confirmed in all countries but the information is still scarce and further monitoring is required. In this regard, remote sensing or metagenomics are good alternatives at reasonable cost. The risk management of freshwaters from those countries considering the most frequent uses (consumption and recreation) has been also evaluated. Only Spain and Peru include cyanotoxins in its drinking water legislation (only MC-LR) and thus, there is a need for regulatory improvements. The development of preventive strategies like diminishing nutrient loads to aquatic systems is also required. In the same line, corrective measures are urgently needed especially in drinking waters. Advanced Oxidation Processes (AOPs) have the potential to play a major role in this scenario as they are effective for the elimination of most cyanotoxins classes. The research on the field of AOPs is herein summarized considering the cost-effectiveness, environmental character and technical applicability of such technologies. Fenton-based processes and photocatalysis using solar irradiation or LED light represent very promising alternatives given their high cost-efficiency. Further research should focus on developing stable long-term operation systems, addressing their scale-up.
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Affiliation(s)
- Macarena Munoz
- Departamento de Ingeniería Química, Universidad Autónoma de Madrid, Madrid, Spain.
| | - Samuel Cirés
- Departamento de Biología, Universidad Autónoma de Madrid, Madrid, Spain.
| | - Zahara M de Pedro
- Departamento de Ingeniería Química, Universidad Autónoma de Madrid, Madrid, Spain
| | - José Ángel Colina
- Departamento de Ingeniería Química, Universidad de Cartagena, Cartagena de Indias, Colombia
| | | | - Javier Carmona-Jiménez
- Departamento de Ecología y Recursos Naturales, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - Angela Caro-Borrero
- Departamento de Ecología y Recursos Naturales, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - Anthony Salazar
- Centro de Investigación y Tecnología de Agua - CITA, Universidad de Ingeniería y Tecnología - UTEC, Lima, Peru
| | | | - David Contreras
- Centro de Biotecnología, Universidad de Concepción, Concepción, Chile
| | - Elvira Perona
- Departamento de Biología, Universidad Autónoma de Madrid, Madrid, Spain
| | - Antonio Quesada
- Departamento de Biología, Universidad Autónoma de Madrid, Madrid, Spain
| | - Jose A Casas
- Departamento de Ingeniería Química, Universidad Autónoma de Madrid, Madrid, Spain
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26
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Kurtz T, Zeng T, Rosario-Ortiz FL. Photodegradation of cyanotoxins in surface waters. WATER RESEARCH 2021; 192:116804. [PMID: 33494040 DOI: 10.1016/j.watres.2021.116804] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 12/15/2020] [Accepted: 12/31/2020] [Indexed: 06/12/2023]
Abstract
Cyanotoxin-producing harmful algal blooms (HABs) are a global occurrence and pose ecotoxicological threats to humans and animals alike. The presence of cyanotoxins can seriously harm or kill nearby wildlife and restrict a body of water's use as a drinking water supply and recreational site, making it imperative to fully understand their fate and transport in natural waters. Photodegradation contributes to the overall degradation of cyanotoxins in environmental systems, especially for those present in the photic zone of surface waters. This makes photochemical transformation mechanisms important factors to account for when assessing the persistence of cyanotoxins in environmental systems. This paper reviews current knowledge on the photodegradation rates and pathways of cyanotoxins that can occur over the course of HABs. Sensitized, or indirect, photolysis contributes to the degradation of all cyanotoxins addressed in this paper (anatoxins, cylindrospermopsins, domoic acids, microcystins, and nodularins), with hydroxyl radicals (•OH), excited triplet states formed from the absorption of light by dissolved organic matter (3DOM*), and photosynthetic pigment sensitized pathways being of primary interest. Direct photolysis pathways play a less significant role, but are still relevant for most of the cyanotoxins discussed in this paper.
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Affiliation(s)
- Tyler Kurtz
- Department of Civil, Environmental, and Architectural Engineering, University of Colorado Boulder, Colorado 80309, United States; Environmental Engineering Program, University of Colorado Boulder, Colorado 80309, United States
| | - Teng Zeng
- Department of Civil and Environmental Engineering, 151 Link Hall, Syracuse University, Syracuse, NY 13244, United States
| | - Fernando L Rosario-Ortiz
- Department of Civil, Environmental, and Architectural Engineering, University of Colorado Boulder, Colorado 80309, United States; Environmental Engineering Program, University of Colorado Boulder, Colorado 80309, United States.
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27
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Improving the degradation of low concentration of microcystin-LR with PEM electrolyzers and photo-electrolyzers. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.118189] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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28
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Liang D, Li N, An J, Ma J, Wu Y, Liu H. Fenton-based technologies as efficient advanced oxidation processes for microcystin-LR degradation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 753:141809. [PMID: 33207450 DOI: 10.1016/j.scitotenv.2020.141809] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 08/17/2020] [Accepted: 08/17/2020] [Indexed: 06/11/2023]
Abstract
In recent years, the safety and ecology threat of cyanobacterial burst has drawn wide concern, especially the release of toxic microcystin-LR (MC-LR). To break through the bottleneck of uncomplete MC-LR degradation by conventional physical-chemistry methods, Fenton-based advanced oxidation processes (AOPs) developed rapidly due to striking degradation efficiency through the potent hydroxyl radicals (HO·) oxidation. Herein, a comprehensive overview is presented on the recent achievements of the various Fenton-based technologies (including conventional Fenton, photo-Fenton, electro-Fenton, ozone-Fenton and sono-Fenton) for MC-LR degradation. In particular, the comparisons between various Fenton-based technologies about advantages and drawbacks are discussed. Based on analyzing the degradation intermediates and pathways, the destruction of Adda chain via hydroxylation was confirmed to be essential for detoxification of MC-LR. Roles of influencing factors such as MC-LR initial concentration, dosages of the catalyst and oxidant, environment alkalinity, natural organic matters (NOMs) as well as other inorganic ions are specifically summarized. This Review also gave special emphasis on technique optimization trends for Fenton application of MC-LR degradation, as well as key challenges and future opportunities in this fast developing field.
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Affiliation(s)
- Danhui Liang
- Tianjin Key Lab of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, China
| | - Nan Li
- Tianjin Key Lab of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, China
| | - Jingkun An
- Tianjin Key Lab of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, China
| | - Jian Ma
- Institute of Applied Ecology, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, Liaoning 110016, China
| | - Yu Wu
- Tianjin Key Lab of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, China
| | - Hongbo Liu
- Tianjin Key Lab of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, China.
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29
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Sorlini S, Collivignarelli C, Carnevale Miino M, Caccamo FM, Collivignarelli MC. Kinetics of Microcystin-LR Removal in a Real Lake Water by UV/H 2O 2 Treatment and Analysis of Specific Energy Consumption. Toxins (Basel) 2020; 12:toxins12120810. [PMID: 33371280 PMCID: PMC7766062 DOI: 10.3390/toxins12120810] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 12/16/2020] [Accepted: 12/18/2020] [Indexed: 01/27/2023] Open
Abstract
The hepatotoxin microcystin-LR (MC-LR) represents one of the most toxic cyanotoxins for human health. Considering its harmful effect, the World Health Organization recommended a limit in drinking water (DW) of 1 µg L−1. Due to the ineffectiveness of conventional treatments present in DW treatment plants against MC-LR, advanced oxidation processes (AOPs) are gaining interest due to the high redox potential of the OH• radicals. In this work UV/H2O2 was applied to a real lake water to remove MC-LR. The kinetics of the UV/H2O2 were compared with those of UV and H2O2 showing the following result: UV/H2O2 > UV > H2O2. Within the range of H2O2 tested (0–0.9 mM), the results showed that H2O2 concentration and the removal kinetics followed an increasing quadratic relation. By increasing the initial concentration of H2O2, the consumption of oxidant also increased but, in terms of MC-LR degraded for H2O2 dosed, the removal efficiency decreased. As the initial MC-LR initial concentration increased, the removal kinetics increased up to a limit concentration (80 µg L−1) in which the presence of high amounts of the toxin slowed down the process. Operating with UV fluence lower than 950 mJ cm−2, UV alone minimized the specific energy consumption required. UV/H2O2 (0.3 mM) and UV/H2O2 (0.9 mM) were the most advantageous combination when operating with UV fluence of 950–1400 mJ cm−2 and higher than 1400 mJ cm−2, respectively.
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Affiliation(s)
- Sabrina Sorlini
- Department of Civil, Environmental, Architectural Engineering and Mathematics, University of Brescia, 25123 Brescia, Italy;
- Correspondence:
| | - Carlo Collivignarelli
- Department of Civil, Environmental, Architectural Engineering and Mathematics, University of Brescia, 25123 Brescia, Italy;
| | - Marco Carnevale Miino
- Department of Civil Engineering and Architecture, University of Pavia, 27100 Pavia, Italy; (M.C.M.); (F.M.C.); (M.C.C.)
| | - Francesca Maria Caccamo
- Department of Civil Engineering and Architecture, University of Pavia, 27100 Pavia, Italy; (M.C.M.); (F.M.C.); (M.C.C.)
| | - Maria Cristina Collivignarelli
- Department of Civil Engineering and Architecture, University of Pavia, 27100 Pavia, Italy; (M.C.M.); (F.M.C.); (M.C.C.)
- Interdepartmental Centre for Water Research, University of Pavia, 27100 Pavia, Italy
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30
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Camacho-Muñoz D, Fervers AS, Pestana CJ, Edwards C, Lawton LA. Degradation of microcystin-LR and cylindrospermopsin by continuous flow UV-A photocatalysis over immobilised TiO 2. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 276:111368. [PMID: 32942219 DOI: 10.1016/j.jenvman.2020.111368] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 08/13/2020] [Accepted: 09/07/2020] [Indexed: 06/11/2023]
Abstract
The increasing presence of freshwater toxins have brought new challenges to preserve water quality due to their potential impact on the environment and human health. Two commonly occurring cyanotoxins, microcystin-LR and cylindrospermopsin, with different physico-chemical properties were used to evaluate the efficiency of photocatalysis using a continuous-flow reactor with immobilized TiO2 on glass tubes and UV-A light. The effect of flow rate and hydrogen peroxide addition on the efficiency of cyanotoxin removal were evaluated. An analysis of the effects on microcystin-LR removal efficiency showed that low flow rates (1 mL/min) and high H2O2 concentrations (120 mg/L) were needed to provide effective degradation. Up to 27.9% and 39.1% removal of MC-LR and CYN, respectively were achieved by UV-A/TiO2 after a single pass through the reactor. A slight increase of the removal of both cyanotoxins was observed when they were in a mixture (35.5% of MC-LR and 51.3% of CYN). The addition of H2O2 to the UV/TiO2 system led to an average removal enhancement of 92.6% of MC-LR and of 29.5% of CYN compared to the UV/TiO2 system. Photolysis assisted by H2O2 degraded MC-LR by up to 77.7%. No significant removal (<10%) was observed by photolysis alone or physical adsorption. This study presents a proof-of-principle that demonstrates the feasibility for this technology to be integrated in large-scale applications.
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Affiliation(s)
- Dolores Camacho-Muñoz
- School of Pharmacy and Life Sciences, Robert Gordon University, Aberdeen, AB10 7GJ, UK.
| | - Anne-Sophie Fervers
- School of Pharmacy and Life Sciences, Robert Gordon University, Aberdeen, AB10 7GJ, UK
| | - Carlos J Pestana
- School of Pharmacy and Life Sciences, Robert Gordon University, Aberdeen, AB10 7GJ, UK
| | - Christine Edwards
- School of Pharmacy and Life Sciences, Robert Gordon University, Aberdeen, AB10 7GJ, UK
| | - Linda A Lawton
- School of Pharmacy and Life Sciences, Robert Gordon University, Aberdeen, AB10 7GJ, UK
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31
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He X, Wang A, Wu P, Tang S, Zhang Y, Li L, Ding P. Photocatalytic degradation of microcystin-LR by modified TiO 2 photocatalysis: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 743:140694. [PMID: 32673915 DOI: 10.1016/j.scitotenv.2020.140694] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 06/30/2020] [Accepted: 06/30/2020] [Indexed: 05/23/2023]
Abstract
Microcystin-LR (MC-LR), the most toxic and commonly encountered cyanotoxin, is produced by harmful cyanobacterial blooms and potentially threatens human and ecosystems health. Titanium dioxide (TiO2) photocatalysis is attracting growing attention and has been considered as an efficient, environmentally friendly and promising solution to eliminate MC-LR in the aquatic ecosystems. Over recent decades, scientific efforts have been directed towards the understanding of fundamentals, modification strategies, and application potentials of TiO2 photocatalysis in degrading MC-LR. In this article, recent reports have been reviewed and progress has been summarized in the development of heterogeneous TiO2-based photocatalysts for MC-LR photodegradation under visible, UV, or solar light. The proposed photocatalytic principles of TiO2 and destruction of MC-LR have been thoroughly discussed. Specifically, some main modification methods for improving the drawbacks and performance of TiO2 nanoparticle were highlighted, including element doping, semiconductor coupling, immobilization, floatability amelioration and magnetic separation. Moreover, the performance evaluation metrics quantum yield (QY) and figure of merit (FOM) were used to compare different photocatalysts in MC-LR degradation. The best performance was seen in N-TiO2 with QY and FOM values of 2.20E-07 molecules/photon and 1.00E-11 mol·L/(g·J·h). N-TiO2 or N-TiO2-based materials may be excellent options for photocatalyst design in terms of MC-LR degradation. Finally, a summary of the remaining challenges and perspectives on new tendencies in this exciting frontier and still an emerging area of research were addressed accordingly. Overall, the present review will offer a deep insight for understanding the photodegradation of MC-LR with modified TiO2 to further inspire researchers that work in associated fields.
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Affiliation(s)
- Xinghou He
- Central South University Xiangya School of Public Health, Changsha, Hunan 410078, China
| | - Anzhi Wang
- University School of South China Hengyang Medical School, Hengyang, Hunan 421001, China
| | - Pian Wu
- Central South University Xiangya School of Public Health, Changsha, Hunan 410078, China
| | - Shibiao Tang
- Central South University School of Minerals Processing and Bioengineering, Changsha, Hunan 410083, China
| | - Yong Zhang
- Central South University Xiangya School of Public Health, Changsha, Hunan 410078, China
| | - Lei Li
- Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu 211166, China
| | - Ping Ding
- Central South University Xiangya School of Public Health, Changsha, Hunan 410078, China.
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32
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Hwang TM, Nam SH, Lee J, Koo JW, Kim E, Kwon M. Hydroxyl radical scavenging factor measurement using a fluorescence excitation-emission matrix and parallel factor analysis in ultraviolet advanced oxidation processes. CHEMOSPHERE 2020; 259:127396. [PMID: 32645596 DOI: 10.1016/j.chemosphere.2020.127396] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 06/01/2020] [Accepted: 06/10/2020] [Indexed: 06/11/2023]
Abstract
The performance of the UV/H2O2 advanced oxidation process (AOP) is dependent on water quality parameters, including the UV absorbance coefficient at 254 nm and hydroxyl radical (•OH) water background demand (scavenging factor, s-1). The •OH scavenging factor represents the •OH scavenging rate of the background substances in the water matrix, and it is known to be one of the key parameters to predict the performance of the UV/H2O2 process. The •OH scavenging factor has been determined experimentally by using a probe compound such as pCBA and rhodamine B. The experimental method has been validated to accurately predict the micropollutants removal in the UV/H2O2 process, but there is a need for an easier and simple method of determining the OH scavenging factor. We evaluated the alternative method to analyze the •OH scavenging factor using fluorescence excitation-emission matrix and parallel factor analysis (F-EEM/PARAFAC). The correlation between •OH scavenging factor and the spectroscopic characteristics and structure of different organic matter types was evaluated. Organic matter was characterized using a fluorescence excitation-emission matrix, parallel factor analysis, and liquid chromatography-organic carbon detection. Second-order reaction rates of humic acid sodium salt, sodium alginate, Suwannee River humic acid and bovine serum albumin were calculated as 1.30 × 108 M-1 s-1, 1.39 × 108 M-1 s-1, 1.03 × 108 M-1 s-1, and 3.17 × 107 M-1 s-1, respectively. Results of PARAFAC analysis, the ratio of humic and fulvic fluorescence component 2 to terrestrial humic-like fluorescence component 1 (C2/C1), and •OH scavenging factor showed high linearity. A predictive model, which combines with the F-EEM/PARAFAC method, predicted the optimal UV and H2O2 dose to achieve target compound removal.
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Affiliation(s)
- Tae-Mun Hwang
- Korea Institute of Civil Engineering and Building Technology, 283 Goyangdar-Ro, Ilsan-Gu, Goyang-Si, Gyeonggi-Do, 411-712, Republic of Korea; Korea University of Science & Technology, 217 Gajung-ro Yuseong-gu, Daejeon, 305-333, Republic of Korea.
| | - Sook-Hyun Nam
- Korea Institute of Civil Engineering and Building Technology, 283 Goyangdar-Ro, Ilsan-Gu, Goyang-Si, Gyeonggi-Do, 411-712, Republic of Korea
| | - Juwon Lee
- Korea Institute of Civil Engineering and Building Technology, 283 Goyangdar-Ro, Ilsan-Gu, Goyang-Si, Gyeonggi-Do, 411-712, Republic of Korea; Korea University of Science & Technology, 217 Gajung-ro Yuseong-gu, Daejeon, 305-333, Republic of Korea
| | - Jae-Wuk Koo
- Korea Institute of Civil Engineering and Building Technology, 283 Goyangdar-Ro, Ilsan-Gu, Goyang-Si, Gyeonggi-Do, 411-712, Republic of Korea
| | - Eunju Kim
- Korea Institute of Civil Engineering and Building Technology, 283 Goyangdar-Ro, Ilsan-Gu, Goyang-Si, Gyeonggi-Do, 411-712, Republic of Korea
| | - Minhwan Kwon
- Department of Environmental Engineering (YIEST), Yonsei University, Republic of Korea
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33
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Kim HS, Park YH, Kim S, Choi YE. Application of a polyethylenimine-modified polyacrylonitrile-biomass waste composite fiber sorbent for the removal of a harmful cyanobacterial species from an aqueous solution. ENVIRONMENTAL RESEARCH 2020; 190:109997. [PMID: 32739269 DOI: 10.1016/j.envres.2020.109997] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 07/03/2020] [Accepted: 07/23/2020] [Indexed: 05/27/2023]
Abstract
Cyanobacterial harmful algal blooms (Cyano-HABs) in water resources involving algal species such as Microcystis aeruginosa have become a serious environmental issue due to their severely negative effects. In the present study, an adsorption-based strategy was employed to control M. aeruginosa, with industrial waste-derived Escherichia coli biomass valorized to produce polyethylenimine-modified polyacrylonitrile-E. coli biomass composite fiber (PEI-PANBF). PEI-PANBF removed approximately 80% of M. aeruginosa cells from an aqueous solution without causing any cell damage. Interestingly, the thickness of PEI-PANBF had a strong influence on the efficiency of M. aeruginosa cell removal. In addition, PEI-PANBF simultaneously removed M. aeruginosa cells and their toxic secondary metabolite, microcystin-LR, from aqueous media. Thus, our proposed fiber represents a feasible utilization method of industrial waste biomass as a biosorbent for the control of Cyano-HABs.
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Affiliation(s)
- Ho Seon Kim
- Division of Environmental Science & Ecological Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Yun Hwan Park
- Division of Environmental Science & Ecological Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Sok Kim
- Division of Environmental Science & Ecological Engineering, Korea University, Seoul, 02841, Republic of Korea; BK21 Plus Eco-Leader Education Center, Korea University, Seoul, 02841, Republic of Korea.
| | - Yoon-E Choi
- Division of Environmental Science & Ecological Engineering, Korea University, Seoul, 02841, Republic of Korea.
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Zhou T, Cao H, Zheng J, Teng F, Wang X, Lou K, Zhang X, Tao Y. Suppression of water-bloom cyanobacterium Microcystis aeruginosa by algaecide hydrogen peroxide maximized through programmed cell death. JOURNAL OF HAZARDOUS MATERIALS 2020; 393:122394. [PMID: 32114135 DOI: 10.1016/j.jhazmat.2020.122394] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Revised: 02/22/2020] [Accepted: 02/22/2020] [Indexed: 06/10/2023]
Abstract
The global expansion and intensification of toxic cyanobacterial blooms require effective algaecides. Algaecides should be selective, effective, fast-acting, and ideally suppress cyanotoxin production. In this study, whether both maximum growth suppression and minimal toxin production can be simultaneously achieved was tested with a selective algaecide H2O2, through its ability to induce apoptosis-like programmed cell death (AL PCD) in a common bloom species Microcystis aeruginosa. Under doses of 1-15 mg L-1, non-monotonic dose-response suppression of H2O2 on M. aeruginosa were observed, where maximal cell death and minimal microcystin production both occurred at a moderate dose of 10 mg L-1 H2O2. Maximal cell death was indeed achieved through AL PCD, as revealed by integrated biochemical, structural, physiological and transcriptional evidence; transcriptional profile suggested AL PCD was mediated by mazEF and lexA systems. Higher H2O2 doses directly led to necrosis in M. aeruginosa, while lower doses only caused recoverable stress. The integrated data showed the choice between the two modes of cell death is determined by the intracellular energy state under stress. A model was proposed for suppressing M. aeruginosa with AL PCD or necrosis. H2O2 was demonstrated to simultaneously maximize the suppression of both growth and microcystin production through triggering AL PCD.
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Affiliation(s)
- Tingru Zhou
- Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, PR China; Key Laboratory of Microorganism Application and Risk Control (MARC) of Shenzhen, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, PR China
| | - Huansheng Cao
- Biodesign Center for Fundamental and Applied Microbiomics, Arizona State University, Tempe, AZ, 85287, USA.
| | - Jie Zheng
- Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, PR China; Shenzhen Engineering Research Laboratory for Sludge and Food Waste Treatment and Resource Recovery, Tsinghua Shenzhen International Graduate School, Tsinghua University, PR China
| | - Fei Teng
- Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, PR China; Key Laboratory of Microorganism Application and Risk Control (MARC) of Shenzhen, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, PR China
| | - Xuejian Wang
- Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, PR China; Key Laboratory of Microorganism Application and Risk Control (MARC) of Shenzhen, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, PR China
| | - Kai Lou
- Shenzhen Engineering Research Laboratory for Sludge and Food Waste Treatment and Resource Recovery, Tsinghua Shenzhen International Graduate School, Tsinghua University, PR China
| | - Xihui Zhang
- Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, PR China
| | - Yi Tao
- Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, PR China; Key Laboratory of Microorganism Application and Risk Control (MARC) of Shenzhen, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, PR China.
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Gao J, Luo C, Gan L, Wu D, Tan F, Cheng X, Zhou W, Wang S, Zhang F, Ma J. A comparative study of UV/H 2O 2 and UV/PDS for the degradation of micro-pollutants: kinetics and effect of water matrix. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:24531-24541. [PMID: 32306270 DOI: 10.1007/s11356-020-08794-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 04/06/2020] [Indexed: 06/11/2023]
Abstract
Organic micro-pollutants such as pesticides and endocrine disruptors cause serious harm to human health and aquatic ecosystem. In this study, the potential degradation of atrazine (ATZ), triclosan (TCS), and 2,4,6-trichloroanisole (TCA) by UV-activated peroxydisulfate (UV/PDS) and UV-activated H2O2 (UV/H2O2) processes were evaluated under different conditions. Results showed that UV/PDS process was more effective than UV/H2O2 under the same conditions. Increasing oxidant dosage or decreasing the initial ATZ, TCS, and TCA concentrations promoted the degradation rates of these three compounds. The presence of natural organic matter (NOM) could effectively scavenge sulfate radical (SO4•-) and hydroxyl radical (HO•) and reduced the removal rates of target compounds. Degradation rates of ATZ and TCA decreased with pH increasing from 5.0 to 9.0 in UV/PDS process, while in UV/H2O2 process, the increase of solution pH had little effect on ATZ and TCA degradation. In the UV/PDS and UV/H2O2 oxidation process, when the solution pH increased from 5 to 8, the removal rates of TCS decreased by 19% and 1%, while when the solution pH increased to 9, the degradation rates of TCS increased by 23% and 17%. CO32-/HCO3- had a small inhibitory effect on ATZ and TCA degradation by UV/H2O2 and UV/PDS processes but promoted the degradation of TCS significantly (> 2 mM). Cl- had little effect on the degradation of ATZ, TCA, and TCS in UV/H2O2 process. Cl- significant inhibited on the degradation of ATZ and TCS, but the influence of Cl- on the degradation of TCA was weak in UV/PDS process. Based on these experimental results, the various contributions of those secondary radicals (i.e., carbonate radical, chlorine radical) were discussed. This study can contribute to better understand the reactivities when UV/PDS and UV/H2O2 are applied for the treatment of micro-pollutant-containing waters.
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Affiliation(s)
- Jing Gao
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, 250010, China
| | - Congwei Luo
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, 250010, China.
| | - Lu Gan
- Shandong Electric Power Engineering Consulting Institute Corp., LTD., Jinan, 250010, China
| | - Daoji Wu
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, 250010, China.
| | - Fengxun Tan
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, 250010, China
| | - Xiaoxiang Cheng
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, 250010, China
| | - Weiwei Zhou
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, 250010, China
| | - Shishun Wang
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, 250010, China
| | - Fumiao Zhang
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, 250010, China
| | - Jun Ma
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China
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Sun B, Wang Y, Xiang Y, Shang C. Influence of pre-ozonation of DOM on micropollutant abatement by UV-based advanced oxidation processes. JOURNAL OF HAZARDOUS MATERIALS 2020; 391:122201. [PMID: 32045804 DOI: 10.1016/j.jhazmat.2020.122201] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Revised: 01/08/2020] [Accepted: 01/28/2020] [Indexed: 06/10/2023]
Abstract
Dissolved organic matter (DOM), ubiquitously co-present in micropollutant-impaired water, significantly decreases micropollutant removal in UV-based AOPs through consuming radicals and filtering UV light. In this study, pre-ozonation was proposed to alleviate the negative effects of DOM on UV-based AOPs. After ozone treatment of DOM-containing water at ozone dosages of 0.1-1 mg O3/mg DOC, the degradation rate of benzoic acid (BA) in UV/H2O2 process increased by 7-34% mainly due to the enhanced transmission of UV light. The degradation rate of BA in UV/S2O82- process varied from -11% to 25% at ozone dosages of 0.1-1 mg O3/mg DOC because of the increased photolysis rate of S2O82- and the altered reactivity of DOM towards SO4-. Pre-ozonation of DOM at ozone dosage of 1 mg O3/mg DOC enhanced the oxidation rate of BA in UV/chlorine process by 35% due to the increased rate of chlorine photolysis and the decreased reactivity of DOM towards Cl. The influence of pre-ozonation on the formation potential of disinfection by-products (DBPs) depends on the kind of AOPs and the species of DBPs. The energy cost analysis suggests that pre-ozonation of DOM is an economic process for enhancing pollutant abatement by UV-based AOPs.
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Affiliation(s)
- Bo Sun
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong; Institute for Advanced Study, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong.
| | - Yu Wang
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong.
| | - Yingying Xiang
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong.
| | - Chii Shang
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong.
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37
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Adsorption Strategy for Removal of Harmful Cyanobacterial Species Microcystis aeruginosa Using Chitosan Fiber. SUSTAINABILITY 2020. [DOI: 10.3390/su12114587] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Microcystis aeruginosa is one of the predominant species responsible for cyanobacterial-harmful algal blooms (Cyano-HABs) in water bodies. Cyano-HABs pose a growing number of serious threats to the environment and public health. Therefore, the demand for developing safe and eco-friendly solutions to control Cyano-HABs is increasing. In the present study, the adsorptive strategy using chitosan was applied to remove M. aeruginosa cells from aqueous phases. Using a simple immobilization process, chitosan could be fabricated as a fiber sorbent (chitosan fiber, CF). By application of CF, almost 89% of cyanobacterial cells were eliminated, as compared to those in the control group. Field emission scanning electron microscopy proved that the M. aeruginosa cells were mainly attached to the surface of the sorbent, which was correlated well with the measurement of the surface area of the fiber. We tested the hypothesis that massive applications of the fabricated CF to control Cyano-HABs might cause environmental damage. However, the manufactured CF displayed negligible toxicity. Moreover, we observed that the release of cyanotoxins and microcystins (MCs), during the removal process using CF, could be efficiently prevented by a firm attachment of the M. aeruginosa cells without cell lysis. Our results suggest the possibility of controlling Cyano-HABs using a fabricated CF as a non-toxic and eco-friendly agent for scaled-up applications.
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38
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Huang Y, Kong M, Coffin S, Cochran KH, Westerman DC, Schlenk D, Richardson SD, Lei L, Dionysiou DD. Degradation of contaminants of emerging concern by UV/H 2O 2 for water reuse: Kinetics, mechanisms, and cytotoxicity analysis. WATER RESEARCH 2020; 174:115587. [PMID: 32097806 DOI: 10.1016/j.watres.2020.115587] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2019] [Revised: 01/31/2020] [Accepted: 02/02/2020] [Indexed: 06/10/2023]
Abstract
Advanced oxidation using UV and hydrogen peroxide (UV/H2O2) has been widely applied to degrade contaminants of emerging concern (CECs) in wastewater for water reuse. This study investigated the degradation kinetics of mixed CECs by UV/H2O2 under variable H2O2 doses, including bisphenol A, estrone, diclofenac, ibuprofen, and triclosan. Reverse osmosis (RO) treated water samples from Orange County Water District's Groundwater Replenishment System (GWRS) potable reuse project were collected on different dates and utilized as reaction matrices with spiked additions of chemicals (CECs and H2O2) to assess the application of UV/H2O2. Possible degradation pathways of selected CECs were proposed based on high resolution mass spectrometry identification of transformation products (TPs). Toxicity assessments included cytotoxicity, aryl hydrocarbon receptor-binding activity, and estrogen receptor-binding activity, in order to evaluate potential environmental impacts resulting from CEC degradation by UV/H2O2. Cytotoxicity and estrogenic activity were significantly reduced during the degradation of mixed CECs in Milli-Q water by UV/H2O2 with high UV fluence (3200 mJ cm-2). However, in GWRS RO-treated water samples collected in April 2017, the cytotoxicity and estrogen activity of spiked CEC-mixture after UV/H2O2 treatment were not significantly eliminated; this might be due to the high concentration of target CEC and their TPs, which was possibly affected by the varied quality of the secondary treatment influent at this facility such as sewer-shed and wastewater discharges. This study aimed to provide insight on the impacts of post-UV/H2O2 CECs and TPs on human and ecological health at cellular level.
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Affiliation(s)
- Ying Huang
- Department of Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, OH, 45221, United States; College of Chemical and Biological Engineering, Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Zhejiang University, Zhejiang, 310012, China
| | - Minghao Kong
- Department of Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, OH, 45221, United States
| | - Scott Coffin
- Department of Environmental Sciences, University of California, Riverside, CA, 92521, United States; California State Water Resources Control Board, Sacramento, CA, 95814, United States
| | - Kristin H Cochran
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, 29208, United States
| | - Danielle C Westerman
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, 29208, United States
| | - Daniel Schlenk
- Department of Environmental Sciences, University of California, Riverside, CA, 92521, United States; Institute of Environmental Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Susan D Richardson
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, 29208, United States
| | - Lecheng Lei
- College of Chemical and Biological Engineering, Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Zhejiang University, Zhejiang, 310012, China
| | - Dionysios D Dionysiou
- Department of Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, OH, 45221, United States.
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Chen G, Qiao Y, Liu F, Zhang X, Liao H, Zhang R, Dong J. Effects of fertilization on the triafamone photodegradation in aqueous solution: Kinetic, identification of photoproducts and degradation pathway. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 194:110363. [PMID: 32120175 DOI: 10.1016/j.ecoenv.2020.110363] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 02/01/2020] [Accepted: 02/20/2020] [Indexed: 06/10/2023]
Abstract
Triafamone is a highly effective, low toxicity sulfonamide herbicide widely used for weeding paddy fields. The triafamone photodegradation in water environment must be explored for its ecological risk assessment. In this work, the effects of chemical fertilizer (urea, diammonium phosphate, potassium chloride, and potassium sulfate), urea metabolites (CO32- and HCO3-), and organic fertilizers (unfermented organic fertilizer [UOF] and fermented organic fertilizer [FOF]) on the triafamone photodegradation in aqueous solution under simulated sunlight were evaluated. Results showed that the triafamone photodegradation rate was unaffected by urea. The half-life of triafamone decreased from 106.8 h to 68.4 h with increasing diammonium phosphate concentration. Potassium chloride, potassium sulfate, CO32-, and HCO3- could accelerate the triafamone photodegradation at all concentrations, whereas the degradation rate of triafamone decreased when the concentration of potassium sulfate or CO32- was 2000 mg/L. Triafamone photodegradation was promoted by 20-200 mg/L UOF and FOF but decreased to 236.6 and 142.3 h when the concentration reached 2000 mg/L. Twenty-three transformation products were isolated and identified from triafamone by using ultra-performance liquid chromatography with quadrupole time-of-flight mass spectrometry under simulated sunlight irradiation, and the kinetic evolution of these products was explored. Five possible degradation pathways were inferred, including the cleavage of C-N, C-C, and C-O bonds; CO bond hydrogenation; the cleavage of triazine ring; the cleavage of the sulfonamide bridge; hydroxylation; hydroxyl substitution; methylation; demethylation; amination; and rearrangement. In summary, these results are important for elucidating the environmental fate of triafamone in aquatic systems and further assessing environmental risks.
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Affiliation(s)
- Guofeng Chen
- Safety and Quality Institute of Agricultural Products, Heilongjiang Academy of Agricultural Sciences, Harbin, 150086, China.
| | - Yuxin Qiao
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Feng Liu
- Safety and Quality Institute of Agricultural Products, Heilongjiang Academy of Agricultural Sciences, Harbin, 150086, China
| | - Xiaobo Zhang
- Safety and Quality Institute of Agricultural Products, Heilongjiang Academy of Agricultural Sciences, Harbin, 150086, China
| | - Hui Liao
- Safety and Quality Institute of Agricultural Products, Heilongjiang Academy of Agricultural Sciences, Harbin, 150086, China
| | - Ruiying Zhang
- Safety and Quality Institute of Agricultural Products, Heilongjiang Academy of Agricultural Sciences, Harbin, 150086, China
| | - Jiannan Dong
- Safety and Quality Institute of Agricultural Products, Heilongjiang Academy of Agricultural Sciences, Harbin, 150086, China
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40
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Song C, Liu HY, Guo S, Wang SG. Photolysis mechanisms of tetracycline under UV irradiation in simulated aquatic environment surrounding limestone. CHEMOSPHERE 2020; 244:125582. [PMID: 32050352 DOI: 10.1016/j.chemosphere.2019.125582] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 11/30/2019] [Accepted: 12/07/2019] [Indexed: 06/10/2023]
Abstract
As the most typical geological environment, limestone landforms are widespreading in the world and affect the waters that flow around them, which may also change the fate of organic contaminants in these waters. In this study, aquatic environment surrounding limestone was simulated with calcium carbonate, and the photolysis of tetracycline was evaluated under UV irradiation (30 μW/cm2). More tetracycline (up to 98%) was removed in 4 h in the presence of calcium carbonate while only 50% of tetracycline was eliminated in control experiment. The removal of tetracycline was greatly enhanced due to the major roles of alkaline pH and minor roles of Ca2+ and HCO3-/CO32-. In alkaline pH, tetracycline existed as TCs- with higher electronic density in the ring structures, which was more easily attacked by OH. Besides, it could also change the bond orbital energy to facilitate tetracycline absorbing more photon. Moreover, alkaline pH was beneficial to generate more OH and thus promote the indirect photolysis. In addition, alkaline pH also changed the degradation path of tetracycline and rapidly convert tetracycline to the byproducts with m/z 457 via hydroxylation and hydrogen abstraction. This work provides not only better understanding about the fate of tetracycline in aquatic environments but also new insights into the treatment of antibiotic-contaminated water.
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Affiliation(s)
- Chao Song
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China
| | - Hua-Yu Liu
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China
| | - Shuang Guo
- Jinzhou Inspection, Examination and Certification Centre, Jinzhou, 121000, China
| | - Shu-Guang Wang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China.
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41
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Pestana CJ, Hobson P, Robertson PKJ, Lawton LA, Newcombe G. Removal of microcystins from a waste stabilisation lagoon: Evaluation of a packed-bed continuous flow TiO 2 reactor. CHEMOSPHERE 2020; 245:125575. [PMID: 31846787 DOI: 10.1016/j.chemosphere.2019.125575] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 10/26/2019] [Accepted: 12/07/2019] [Indexed: 06/10/2023]
Abstract
Photocatalysis has been shown to successfully remove microcystins (MC) in laboratory experiments. Most research to date has been performed under ideal conditions in pure or ultrapure water. In this investigation the efficiency of photocatalysis using titanium dioxide was examined in a complex matrix (waste stabilisation lagoon water). A flow-through photocatalytic reactor was used for the photocatalytic removal of four commonly occurring microcystin analogues (MC-YR, MC-RR, MC-LR, and MC-LA). Up to 51% removal for single MC analogues in waste lagoon water was observed. Similar removal rates were observed when a mixture of all four MC analogues was treated. Although treatment of MC-containing cyanobacterial cells of Microcystis aeruginosa resulted in no decline in cell numbers or viability with the current reactor design and treatment regime, the photocatalytic treatment did improve the overall quality of waste lagoon water. This study demonstrates that despite the presence of natural organic matter the microcystins could be successfully degraded in a complex environmental matrix.
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Affiliation(s)
- Carlos J Pestana
- Australian Water Quality Centre, South Australian Water Corporation, 250 Victoria Square, Adelaide, SA, 5000, Australia; School of Pharmacy and Life Sciences, Robert Gordon University, Sir Ian Wood Building, Garthdee Road, AB10 7GJ, Aberdeen, UK.
| | - Peter Hobson
- Australian Water Quality Centre, South Australian Water Corporation, 250 Victoria Square, Adelaide, SA, 5000, Australia
| | - Peter K J Robertson
- School of Chemistry and Chemical Engineering, Queen's University, David Keir Building, 39 Stranmillis Road, BT9 5 AG, Belfast, UK
| | - Linda A Lawton
- School of Pharmacy and Life Sciences, Robert Gordon University, Sir Ian Wood Building, Garthdee Road, AB10 7GJ, Aberdeen, UK
| | - Gayle Newcombe
- Australian Water Quality Centre, South Australian Water Corporation, 250 Victoria Square, Adelaide, SA, 5000, Australia
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42
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Souza F, Sáez C, Cañizares P, Rodrigo M. Improving photolytic treatments with electrochemical technology. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2019.116229] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Jing C, Shaopo W, Yaxue Z, Yibo W, Wenjuan Z, Jinfeng L, Zhe W. Oxidation of salicylic acid in water by the O 3 and UV/O 3 processes: removal and reaction byproducts. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2020; 81:753-762. [PMID: 32460278 DOI: 10.2166/wst.2020.155] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In this study, the removal of salicylic acid (SA) in water by ozone (O3) and ultraviolet/ozone (UV/O3) processes was investigated. Results showed that more than 50% of SA (10 mg/L) could be effectively removed after 1 min during these two processes. However, the UV/O3 process was much more effective than the O3 process for SA mineralization, and the total organic carbon reduction after 30 min was 69.5% and 28.1%, respectively. In the two processes, the optimum pH value for SA removal was 4.3, while that for SA mineralization was 10.0. Both bicarbonate and dissolved organic carbon significantly inhibited SA removal during the two processes. Eleven oxidation byproducts were detected in O3 process, but only four byproducts were observed in UV/O3 process. Three hydroxylation aromatic products were identified as the initial byproducts during SA degradation. Glyoxylic acid monohydrate, glycolic acid, and oxalic acid were accumulated in O3 process but not observed in UV/O3 process. Oxalic acid was the only detected small molecular byproduct in UV/O3 process, and it could be further mineralized, thereby indicating that UV/O3 had a greater potential for degrading both SA and its reaction byproducts.
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Affiliation(s)
- Chang Jing
- School of Environmental and Municipal Engineering, Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin Chengjian University, Tianjin 300384, China
| | - Wang Shaopo
- School of Environmental and Municipal Engineering, Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin Chengjian University, Tianjin 300384, China
| | - Zhang Yaxue
- Shenzhen Water Planning and Design Institute Company Limited, Shenzhen 518000, China
| | - Wang Yibo
- School of Environmental and Municipal Engineering, Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin Chengjian University, Tianjin 300384, China
| | - Zhang Wenjuan
- School of Environmental and Municipal Engineering, Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin Chengjian University, Tianjin 300384, China
| | - Lu Jinfeng
- College of Environmental Science and Engineering, NanKai University, Tianjin 300071, China
| | - Wang Zhe
- School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China E-mail:
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44
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Chintalapati P, Mohseni M. Degradation of cyanotoxin microcystin-LR in synthetic and natural waters by chemical-free UV/VUV radiation. JOURNAL OF HAZARDOUS MATERIALS 2020; 381:120921. [PMID: 31374374 DOI: 10.1016/j.jhazmat.2019.120921] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 07/23/2019] [Accepted: 07/24/2019] [Indexed: 06/10/2023]
Abstract
This study investigated the capability of ultraviolet radiation at 254 nm and 185 nm (UV/VUV) to degrade cyanotoxin microcystin-LR (MC-LR). Results showed 70% toxin reduction solely by 254 nm direct photolysis (ε254 = 13,225 ± 814 M-1cm-1; Φ254 = 0.29 ± 0.03 mol/Einstein). The addition of 185 nm increased MC-LR degradation through advanced oxidation by •OH (k•OH,MC-LR = 2.25 ± 0.39 × 1010 M-1s-1). Alkalinity and organics (DOC) reduced MC-LR degradation by scavenging •OH (kobs,MilliQ = 0.117 cm2/mJ; kobs,50ppmAlk. = 0.0497 cm2/mJ; kobs,6ppmDOC = 0.019 cm2/mJ). Chloride absorbed 185 nm, impacting •OH formation and generating Cl•, while also scavenging •OH. However, Cl• is reactive and •OH scavenging is reversible, resulting in relatively low impact on MC-LR degradation (kobs,50ppmCl = 0.0939 cm2/mJ). In natural water, MC-LR could be degraded from a typical concentration (˜15 μg/L) to below detection (<0.5 μg/L) with a UV254 fluence of 200 mJ/cm2 using UV/VUV. The presence of cyanobacterial cells impeded MC-LR degradation; however, 90% MC-LR degradation could still be achieved. UV/VUV is a promising chemical-free technology capable of MC-LR degradation in a variety of water conditions, and a potentially suitable treatment option for small, remote communities.
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Affiliation(s)
- Pranav Chintalapati
- Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, BC V6T 1Z3, Canada.
| | - Madjid Mohseni
- Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, BC V6T 1Z3, Canada.
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Khan NA, Khan SU, Ahmed S, Farooqi IH, Yousefi M, Mohammadi AA, Changani F. Recent trends in disposal and treatment technologies of emerging-pollutants- A critical review. Trends Analyt Chem 2020. [DOI: 10.1016/j.trac.2019.115744] [Citation(s) in RCA: 122] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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46
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Zhang L, Liu Y, Fu Y. Degradation kinetics and mechanism of diclofenac by UV/peracetic acid. RSC Adv 2020; 10:9907-9916. [PMID: 35498603 PMCID: PMC9050214 DOI: 10.1039/d0ra00363h] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Accepted: 02/29/2020] [Indexed: 11/21/2022] Open
Abstract
In this work, the degradation kinetics and mechanism of diclofenac (DCF) by UV/peracetic acid (PAA) was investigated.
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Affiliation(s)
- Li Zhang
- Faculty of Geosciences and Environmental Engineering
- Southwest Jiaotong University
- Chengdu 611756
- China
| | - Yiqing Liu
- Faculty of Geosciences and Environmental Engineering
- Southwest Jiaotong University
- Chengdu 611756
- China
| | - Yongsheng Fu
- Faculty of Geosciences and Environmental Engineering
- Southwest Jiaotong University
- Chengdu 611756
- China
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Jafari N, Ebrahimpour K, Abdolahnejad A, Karimi M, Ebrahimi A. Efficient degradation of microcystin-LR by BiVO 4/TiO 2 photocatalytic nanocomposite under visible light. JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE & ENGINEERING 2019; 17:1171-1183. [PMID: 32030183 PMCID: PMC6985378 DOI: 10.1007/s40201-019-00432-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 12/23/2019] [Indexed: 05/23/2023]
Abstract
Microcystin-Leucine Arginine (MC-LR) is one of the most studied cyanotoxins due to its toxicity and abundant that cause health hazards for humans through of the drinking water. In this study, BiVO4/TiO2 nanocomposite was synthesized by hydrothermal method and employed for the removal of MC-LR. The characteristics of the catalysts were determined by FESEM, XRD and FTIR spectra. Response surface methodology (RSM) was applied to assess the effects of operating variables (pH, contact time, and catalyst dose) on the MC-LR removal. The coefficient of determination (R2) was calculated 98.7% for the response. The residual concentration of MC-LR was measured by high-performance liquid chromatography (HPLC). The results show that the highest removal efficiency of MC-LR was 98% under the optimum conditions (pH = 5, contact time = 90 min, and catalyst dose = 0.5 g/l). MC-LR decomposition efficiency by BiVO4/TiO2 nanocomposite was enhanced by pH reduction and increasing of contact time and catalyst dose. The prepared BiVO4/TiO2 nanocomposite with technological potential can be used directly in environmental preservation, specifically in the decontamination of MC-LR from aqueous solutions.
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Affiliation(s)
- Negar Jafari
- Student Research Committee, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Karim Ebrahimpour
- Environment Research Center, Research Institute for Primordial Prevention of Non-communicable disease, Isfahan University of Medical Sciences, Isfahan, Iran
- Department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Ali Abdolahnejad
- Environment Research Center, Research Institute for Primordial Prevention of Non-communicable disease, Isfahan University of Medical Sciences, Isfahan, Iran
- Department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mahbobe Karimi
- Department of Chemistry, University of Isfahan, Isfahan, Iran
| | - Afshin Ebrahimi
- Environment Research Center, Research Institute for Primordial Prevention of Non-communicable disease, Isfahan University of Medical Sciences, Isfahan, Iran
- Department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran
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A Comparative Study of Microcystin-LR Degradation by UV-A, Solar and Visible Light Irradiation Using Bare and C/N/S-Modified Titania. Catalysts 2019. [DOI: 10.3390/catal9110877] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
In an endeavor to tackle environmental problems, the photodegradation of microcystin-LR (MC-LR), one of the most common and toxic cyanotoxins, produced by the cyanobacteria blooms, was examined using nanostructured TiO2 photocatalysts (anatase, brookite, anatase–brookite, and C/N/S co-modified anatase–brookite) under UV-A, solar and visible light irradiation. The tailoring of TiO2 properties to hinder the electron–hole recombination and improve MC-LR adsorption on TiO2 surface was achieved by altering the preparation pH value. The highest photocatalytic efficiency was 97% and 99% with degradation rate of 0.002 mmol L−1 min−1 and 0.0007 mmol L−1 min−1 under UV and solar irradiation, respectively, using a bare TiO2 photocatalyst prepared at pH 10 with anatase to brookite ratio of ca. 1:2.5. However, the bare TiO2 samples were hardly active under visible light irradiation (25%) due to a large band gap. Upon UV, solar and vis irradiation, the complete MC-LR degradation (100%) was obtained in the presence of C/N/S co-modified TiO2 with a degradation rate constant of 0.26 min−1, 0.11 min−1 and 0.04 min−1, respectively. It was proposed that the remarkable activity of co-modified TiO2 might originate from its mixed-phase composition, mesoporous structure, and non-metal co-modification.
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León C, Boix C, Beltrán E, Peñuela G, López F, Sancho JV, Hernández F. Study of cyanotoxin degradation and evaluation of their transformation products in surface waters by LC-QTOF MS. CHEMOSPHERE 2019; 229:538-548. [PMID: 31100625 DOI: 10.1016/j.chemosphere.2019.04.219] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Revised: 04/26/2019] [Accepted: 04/30/2019] [Indexed: 06/09/2023]
Abstract
In the present work, the degradation of three cyanotoxins from the hepatotoxins group was investigated under laboratory-controlled experiments in water samples. Surface waters spiked with microcystin-LR (MC-LR), nodularin (NOD) and cylindrospermopsin (CYN) were subjected to hydrolysis, chlorination and photo-degradation, under both sunlight (SL) and ultraviolet (UV) radiation. A total of 12 transformation products (TPs) were detected and tentatively identified by liquid chromatography coupled to quadrupole time-of-flight mass spectrometry (LC-QTOF MS). These comprised: 6 chlorination TPs (3 from CYN and 3 from MC-LR, 2 isomers); 4 UV TPs (all from CYN); and 2 sunlight TPs (one isomer from MC-LR and another from NOD). No TPs were observed under hydrolysis conditions. The chemical structures for all TPs were tentatively proposed based on the accurate-mass QTOF MS full-spectra. Analysis of real-world samples collected from the Peñol reservoir (Antioquia, Colombia) revealed the presence of MC-LR and CYN as well as a sunlight TP identified in the laboratory experiments. Data presented in this article will assist further research on TPs potentially formed in future tertiary degradation processes applied for the removal of organic micro-pollutants in water; as well as improving available knowledge on the toxic implications of cyanobacterial toxins TPs in surface waters.
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Affiliation(s)
- Cristina León
- Grupo Diagnóstico y Control de La Contaminación (GDCON), Facultad de Ingeniería Universidad de Antioquia, Medellín, Colombia.
| | - Clara Boix
- Research Institute for Pesticides and Water (IUPA), University Jaume I. Avda, Sos Baynat, E-12071 Castellon, Spain
| | - Eduardo Beltrán
- Research Institute for Pesticides and Water (IUPA), University Jaume I. Avda, Sos Baynat, E-12071 Castellon, Spain
| | - Gustavo Peñuela
- Grupo Diagnóstico y Control de La Contaminación (GDCON), Facultad de Ingeniería Universidad de Antioquia, Medellín, Colombia
| | - Francisco López
- Research Institute for Pesticides and Water (IUPA), University Jaume I. Avda, Sos Baynat, E-12071 Castellon, Spain
| | - Juan V Sancho
- Research Institute for Pesticides and Water (IUPA), University Jaume I. Avda, Sos Baynat, E-12071 Castellon, Spain
| | - Félix Hernández
- Research Institute for Pesticides and Water (IUPA), University Jaume I. Avda, Sos Baynat, E-12071 Castellon, Spain.
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Chen G, Liu F, Qiao Y, Tao B. Photodegradation of tefuryltrione in water under UV irradiation: Identification of transformation products and elucidation of photodegradation pathway. CHEMOSPHERE 2019; 227:133-141. [PMID: 30986595 DOI: 10.1016/j.chemosphere.2019.03.174] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 03/10/2019] [Accepted: 03/26/2019] [Indexed: 06/09/2023]
Abstract
Photodegradation is an important abiotic degradation process in the aquatic environment. In this study, the photodegradation of tefuryltrione in aqueous solution was investigated under UV-Visible irradiation. Effects of carbonate (CO32-), bicarbonate (HCO3-), nitrate (NO3-), hydrogen phosphate (HPO42-), potassium (K+), and ammonium (NH4+) on the photodegradation kinetics of tefuryltrione were evaluated. Results showed that tefuryltrione photodegradation was increased by HCO3-, CO32-, and NO3- in the range of 0.1-10 mmol L-1; decreased by HPO42-; and insignificantly affected by K+ and NH4+. Twelve main transformation products (TPs) were separated and identified on the basis of mass spectrum data assigned by elemental-composition calculations, comparison of structural analogs, and available literature. A tentative photodegradation pathway was further proposed depending on the identified TPs and their kinetic evolutions. Results indicated that TP 1 was generated by the hydroxyl that substituted for chlorine, TP 2 was formed by the cleavage of the ether bond of tefuryltrione, and TPs 3-6 were formed by the breakage of the CC bond of the keto moiety of tefuryltrione. Further, TPs 9-12 were formed by the rearrangement of tefuryltrione-photodegradation products. These findings are highly important for elucidating the environmental fate of tefuryltrione in aquatic ecosystems.
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Affiliation(s)
- Guofeng Chen
- College of Agriculture, Northeast Agricultural University, Harbin, 150030, Heilongjiang, China; Safety and Quality Institute of Agricultural Products, Heilongjiang Academy of Agricultural Sciences, Harbin, 150086, China
| | - Feng Liu
- Safety and Quality Institute of Agricultural Products, Heilongjiang Academy of Agricultural Sciences, Harbin, 150086, China
| | - Yuxin Qiao
- College of Agriculture, Northeast Agricultural University, Harbin, 150030, Heilongjiang, China
| | - Bo Tao
- College of Agriculture, Northeast Agricultural University, Harbin, 150030, Heilongjiang, China.
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