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Zhao S, Wang J. Biodegradation of atrazine and nicosulfuron by Streptomyces nigra LM01: Performance, degradative pathway, and possible genes involved. JOURNAL OF HAZARDOUS MATERIALS 2024; 471:134336. [PMID: 38640665 DOI: 10.1016/j.jhazmat.2024.134336] [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: 01/13/2024] [Revised: 04/15/2024] [Accepted: 04/16/2024] [Indexed: 04/21/2024]
Abstract
Microbial herbicide degradation is an efficient bioremediation method. In this study, a strain of Streptomyces nigra, LM01, which efficiently degrades atrazine and nicosulfuron, was isolated from a corn field using a direct isolation method. The degradation effects of the identified strain on two herbicides were investigated and optimized using an artificial neural network. The maximum degradation rates of S. nigra LM01 were 58.09 % and 42.97 % for atrazine and nicosulfuron, respectively. The degradation rate of atrazine in the soil reached 67.94 % when the concentration was 108 CFU/g after 5 d and was less effective than that of nicosulfuron. Whole genome sequencing of strain LM01 helped elucidate the possible degradation pathways of atrazine and nicosulfuron. The protein sequences of strain LM01 were aligned with the sequences of the degraded proteins of the two herbicides by using the National Center for Biotechnology Information platform. The sequence (GE005358, GE001556, GE004212, GE005218, GE004846, GE002487) with the highest query cover was retained and docked with the small-molecule ligands of the herbicides. The results revealed a binding energy of - 6.23 kcal/mol between GE005358 and the atrazine ligand and - 6.66 kcal/mol between GE002487 and the nicosulfuron ligand.
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Affiliation(s)
- Shengchen Zhao
- College of Resource and Environmental Science, Jilin Agricultural University, Changchun 130118, Jilin, China
| | - Jihong Wang
- College of Resource and Environmental Science, Jilin Agricultural University, Changchun 130118, Jilin, China.
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2
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de Medeiros JF, Montagner CC. Multiple barriers as an efficient treatment for removing pesticides aiming direct potable reuse: A pilot scale study. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 350:124009. [PMID: 38670423 DOI: 10.1016/j.envpol.2024.124009] [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: 01/25/2024] [Revised: 04/14/2024] [Accepted: 04/16/2024] [Indexed: 04/28/2024]
Abstract
Water reuse for potable purposes can represent a realistic source supply of drinking water in areas with water scarcity. Therefore, combining conventional wastewater treatment technologies with advanced technologies is necessary to remove contaminants and obtain high-quality and safe water. In this study, the pesticides and degradation products, atrazine (ATZ), hydroxyatrazine (ATZOH), deethylatrazine (DEA), deisopropylatrazine (DIA), simazine (SMZ), ametryn (AMT), diuron (DIU), 2,4-D, fipronil (FIP), fipronil sulfide (FIP-SF) and fipronil sulfone (FIP-SN) were evaluated in effluent after membrane bioreactor (MBR), effluent after advanced treatment by multiple barriers (MBR, reverse osmosis, UV/H2O2 and activated carbon), in tap water collected in the urban region of Campinas and in the Atibaia River (water supply source from city of Campinas). The pesticide concentrations in the Atibaia River and the post-MBR effluent ranged between 1 and 434 ng L-1 and 1 and 470 ng L-1, respectively. Therefore, the Atibaia River and the post-MBR effluent had the same magnitude pesticide concentrations. In the production of potable water reuse, after the multiple barriers processes, only fipronil (1 ng L-1) and atrazine (3 ng L-1) were quantified in some of the samples. In tap water from Campinas, atrazine, ATZOH, DEA, diuron, and 2,4-D were quantified in concentrations ranging between 3 and 425 ng L-1. Therefore, when comparing drinking water obtained from conventional treatment with potable water reuse, according to the pesticides studied, it is possible to conclude that the advanced treatment used on a pilot scale is promising for use in a potable water reuse plant. However, studies involving more microbiological and chemical parameters should be conducted to classify potable water reuse as drinking water.
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3
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Toth J, Fugère V, Yargeau V. Relationship between stream size, watershed land use, and pesticide concentrations in headwater streams. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 349:123940. [PMID: 38599268 DOI: 10.1016/j.envpol.2024.123940] [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: 10/16/2023] [Revised: 03/30/2024] [Accepted: 04/07/2024] [Indexed: 04/12/2024]
Abstract
A quantitative multiresidue study of current-use pesticides in multiple matrices was undertaken with field sampling at 32 headwater streams near Lac Saint-Pierre in Québec, Canada. A total of 232 samples were collected in five campaigns of stream waters and streambed sediments from streams varying in size and watershed land use. Novel multiresidue analytical methods from previous work were successfully applied for the extraction of pesticide residues from sediments via pressurized liquid extraction (PLE) and quantitative analysis using ultra high-performance liquid chromatography tandem mass spectrometry (UHPLC-MS/MS) with online sample preparation on a hydrophilic-lipophilic balance (HLB) column. Of the 31 target compounds, including 29 pesticides and two degradation products of atrazine, 29 compounds were detected at least once. Consistent with other studies, atrazine and metolachlor were the most widely-detected herbicides. Detections were generally higher in water than sediment samples and the influence of land use on pesticide concentrations was only detectable in water samples. Small streams with a high proportion of agricultural land use in their watershed were generally found to have the highest pesticide concentrations. Corn and soybean monoculture crops, specifically, were found to cause the greatest impact on pesticide concentration in headwater streams and correlated strongly with many of the most frequently detected pesticides. This study highlights the importance of performing multiresidue pesticide monitoring programs in headwater streams in order to capture the impacts of agricultural intensification on freshwater ecosystems.
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Affiliation(s)
- Jonah Toth
- Department of Chemical Engineering, McGill University, 3610 rue University, Montréal, Québec, H3A 0C5, Canada
| | - Vincent Fugère
- Département des sciences de l'environnement, Université du Québec à Trois-Rivières, 3351 boulevard des Forges, Trois-Rivières, Québec, G9A 5H7, Canada
| | - Viviane Yargeau
- Department of Chemical Engineering, McGill University, 3610 rue University, Montréal, Québec, H3A 0C5, Canada.
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Wang R, Wang F, Lu Y, Zhang S, Cai M, Guo D, Zheng H. Spatial distribution and risk assessment of pyrethroid insecticides in surface waters of East China Sea estuaries. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 344:123302. [PMID: 38190875 DOI: 10.1016/j.envpol.2024.123302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 12/31/2023] [Accepted: 01/03/2024] [Indexed: 01/10/2024]
Abstract
Pyrethroid insecticides are the most commonly used household insecticides and pose substantial risks to marine aquatic organisms. many studies have detected pyrethroid insecticides in the waters and estuaries of the western United States, but their distributions within western Pacific estuaries have not been reported. Accordingly, we used high-throughput organic analyses combined with high volume solid-phase extraction to comprehensively assess 13 pyrethroid insecticides in East China Sea estuaries and the Huangpu River. The results demonstrated the presence of various ∑13pyrethroid insecticides in East China Sea estuaries (mean and median values of 8.45 ± 5.57 and 7.78 ng L-1, respectively), among which cypermethrin was the primary contaminant. The concentrations of ∑12pyrethroid insecticide detected in the surface waters at the Huangpu River (mean 6.7 ng L-1, outlet 16.4 ng L-1) were higher than those in the Shanghai estuary (4.7 ng L-1), suggesting that runoff from inland areas is a notable source of insecticides. Wetlands reduced the amount of runoff containing pyrethroid insecticides that reached the ocean. Several factors influenced pesticide distributions in East China Sea estuaries, and higher proportions were derived from agricultural sources than from urban sources, with a higher proportion of agricultural sources than urban sources, influenced by anthropogenic use in the region. Permethrin and cypermethrin were the main compounds contributing to the high ecological risk in the estuaries. Consequently, to prevent risks to marine aquatic life, policymakers should aim to reduce insecticide contaminants derived from urban and agricultural sources.
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Affiliation(s)
- Rui Wang
- Ministry of Natural Resources Key Laboratory for Polar Science, Polar Research Institute of China, 451 Jinqiao Road, Shanghai, 200136, China; State Key Laboratory of Marine Pollution, and Department of Chemistry, City University of Hong Kong, Hong Kong SAR, 999077, China; Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, School of Environment, Beijing Jiaotong University, Beijing, 100044, China
| | - Feng Wang
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Yintao Lu
- Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, School of Environment, Beijing Jiaotong University, Beijing, 100044, China
| | - Shengwei Zhang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, China
| | - Minghong Cai
- Ministry of Natural Resources Key Laboratory for Polar Science, Polar Research Institute of China, 451 Jinqiao Road, Shanghai, 200136, China; School of Oceanography, Shanghai Jiao Tong University, 1954 Huashan Road, Shanghai, 200030, China.
| | - Dongdong Guo
- Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, School of Environment, Beijing Jiaotong University, Beijing, 100044, China
| | - Hongyuan Zheng
- Ministry of Natural Resources Key Laboratory for Polar Science, Polar Research Institute of China, 451 Jinqiao Road, Shanghai, 200136, China
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Maisto M, Ranauda MA, Zuzolo D, Tartaglia M, Postiglione A, Prigioniero A, Falzarano A, Scarano P, Castelvetro V, Corti A, Modugno F, La Nasa J, Biale G, Sciarrillo R, Guarino C. Effects of microplastics on microbial community dynamics in sediments from the Volturno River ecosystem, Italy. CHEMOSPHERE 2024; 349:140872. [PMID: 38056715 DOI: 10.1016/j.chemosphere.2023.140872] [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: 07/20/2023] [Revised: 11/27/2023] [Accepted: 11/30/2023] [Indexed: 12/08/2023]
Abstract
In this study, the sources, abundance, and ecological implications of microplastic (MP) pollution in Volturno, one of the main rivers in southern Italy, were explored by investigating the MP concentration levels in sediments collected along the watercourse. The samples were sieved through 5- and 2-mm sieves and treated with selective organic solvents. The polymer classes polystyrene (PS), polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polycarbonate (PC), nylon 6 (PA6), and nylon 6,6 (PA66) were quantified using pyrolysis-gas chromatography-mass spectrometry (Py-GC/MS) and high-performance liquid chromatography (HPLC). Furthermore, a 16S rRNA metagenomic analysis was performed using next-generation sequencing in Ion Torrent™ to explore the bacterial taxonomy and ecological dynamics of sediment samples. The MPs were detected in all samples collected from the study area. PP and PET were the most abundant and frequently detected polymer types in the analysed samples. The total MP concentration ranged from 1.05 to 14.55 ppm (parts per million), identifying two distinct data populations: high- and low-MP-contaminated sediments. According to the Polymer Hazard Index (PHI), MP pollution was categorised as hazard levels III and IV (corresponding to the danger category). Metagenomic data revealed that the presence of MPs significantly affected the abundance of bacterial taxa; Flavobacteraceae and Nocardiaceae, which are known to degrade polymeric substances, were present in high-MP-contaminated sediments. This study provides new insights into the ecological relevance of MP pollution and suggests that microorganisms may serve as biomarkers of MP pollution.
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Affiliation(s)
- Maria Maisto
- Department of Science and Technology, University of Sannio, Via de Sanctis Snc, 82100, Benevento, Italy
| | - Maria Antonietta Ranauda
- Department of Science and Technology, University of Sannio, Via de Sanctis Snc, 82100, Benevento, Italy
| | - Daniela Zuzolo
- Department of Science and Technology, University of Sannio, Via de Sanctis Snc, 82100, Benevento, Italy.
| | - Maria Tartaglia
- Department of Science and Technology, University of Sannio, Via de Sanctis Snc, 82100, Benevento, Italy
| | - Alessia Postiglione
- Department of Science and Technology, University of Sannio, Via de Sanctis Snc, 82100, Benevento, Italy
| | - Antonello Prigioniero
- Department of Science and Technology, University of Sannio, Via de Sanctis Snc, 82100, Benevento, Italy
| | - Alessandra Falzarano
- Department of Science and Technology, University of Sannio, Via de Sanctis Snc, 82100, Benevento, Italy
| | - Pierpaolo Scarano
- Department of Science and Technology, University of Sannio, Via de Sanctis Snc, 82100, Benevento, Italy
| | - Valter Castelvetro
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Giuseppe Moruzzi, 13, 56124, Pisa, Italy
| | - Andrea Corti
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Giuseppe Moruzzi, 13, 56124, Pisa, Italy
| | - Francesca Modugno
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Giuseppe Moruzzi, 13, 56124, Pisa, Italy
| | - Jacopo La Nasa
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Giuseppe Moruzzi, 13, 56124, Pisa, Italy
| | - Greta Biale
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Giuseppe Moruzzi, 13, 56124, Pisa, Italy
| | - Rosaria Sciarrillo
- Department of Science and Technology, University of Sannio, Via de Sanctis Snc, 82100, Benevento, Italy
| | - Carmine Guarino
- Department of Science and Technology, University of Sannio, Via de Sanctis Snc, 82100, Benevento, Italy
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Yang TN, Wang YX, Jian PA, Ma XY, Zhu SY, Li XN, Li JL. Exogenous Melatonin Alleviates Atrazine-Induced Glucose Metabolism Disorders in Mice Liver via Suppressing Endoplasmic Reticulum Stress. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:742-751. [PMID: 38111124 DOI: 10.1021/acs.jafc.3c06441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2023]
Abstract
Atrazine (ATZ) is a widely used herbicide that has toxic effects on animals. Melatonin (MLT) is a natural hormone with strong antioxidant properties. However, the effect of MLT on the glucose metabolism disorder caused by ATZ is still unclear. Mice were divided into four groups randomly and given 21 days of gavage: blank control group (Con), 5 mg/kg MLT group (MLT), 170 mg/kg ATZ group (ATZ), and 170 mg/kg ATZ and 5 mg/kg MLT group (ATZ + MLT). The results show that ATZ alters mRNA levels of metabolic enzymes related to glycogen synthesis and glycolysis and increased metabolites (glycogen, lactate, and pyruvate). ATZ causes abnormalities in glucose metabolism in mouse liver, interfering with glycemia regulation ability. MLT can regulate the endoplasmic reticulum to respond to disordered glucose metabolism in mice liver. This study suggested that MLT has the power to alleviate the ATZ-induced glycogen overdeposition and glycolytic deficit.
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Affiliation(s)
- Tian-Ning Yang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, P. R. China
| | - Yu-Xiang Wang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, P. R. China
| | - Ping-An Jian
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, P. R. China
| | - Xiang-Yu Ma
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, P. R. China
| | - Shi-Yong Zhu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, P. R. China
| | - Xue-Nan Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, P. R. China
- Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment, Northeast Agricultural University, Harbin 150030, P. R. China
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Northeast Agricultural University, Harbin 150030, P. R. China
| | - Jin-Long Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, P. R. China
- Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment, Northeast Agricultural University, Harbin 150030, P. R. China
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Northeast Agricultural University, Harbin 150030, P. R. China
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7
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Interino N, Comito R, Simoni P, Franzellitti S, Palladino G, Rampelli S, Mosendz A, Gotti R, Roda A, Candela M, Porru E, Fiori J. Extraction method for the multiresidue analysis of legacy and emerging pollutants in marine mussels from the Adriatic Sea. Food Chem 2023:136453. [PMID: 37271683 DOI: 10.1016/j.foodchem.2023.136453] [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: 02/22/2023] [Revised: 05/11/2023] [Accepted: 05/22/2023] [Indexed: 06/06/2023]
Abstract
The release of hazardous chemicals into aquatic environments has long been a known problem, but its full impact has only recently been realized. This study presents a validated liquid chromatography-mass spectrometry (HPLC-MS/MS) method for detecting pharmaceutical and pesticide residues in mussels (Mytilus galloprovincialis). An innovative MS-compatible extraction method was developed and validated, demonstrating successful recovery rates for analytes at three different concentration levels (25-95%). The method detected the target analytes at ng/g concentrations with high accuracy (-7% to 11%) and low relative standard deviation (<10%) for both intra-day and inter-day analyses. After validation, the method was applied to mussel samples collected from a commercial farm near Senigallia, Adriatic Sea, detecting different contaminants in the range of 2-40 ng/g (dry weight). The study provides a valuable tool for investigating the potential threats posed by diverse contaminant classes with high annual tonnage, including analytes with known persistence and/or illegal status.
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Affiliation(s)
- Nicolò Interino
- Department of Chemistry "G. Ciamician", University of Bologna, Via Selmi 2, 40126 Bologna, Italy
| | - Rossana Comito
- Department of Chemistry "G. Ciamician", University of Bologna, Via Selmi 2, 40126 Bologna, Italy
| | - Patrizia Simoni
- Department of Medical and Surgical Sciences, University of Bologna, 40138 Bologna, Italy
| | - Silvia Franzellitti
- Animal and Environmental Physiology Laboratory, Department of Biological, Geological and Environmental Sciences (BiGeA), University of Bologna, Via S. Alberto 163, 48123 Ravenna, Italy
| | - Giorgia Palladino
- Department of Pharmacy and Biotechnology (FaBiT), University of Bologna, Via Belmeloro 6, 40126 Bologna, Italy
| | - Simone Rampelli
- Department of Pharmacy and Biotechnology (FaBiT), University of Bologna, Via Belmeloro 6, 40126 Bologna, Italy
| | - Anastasiia Mosendz
- Department of Chemistry, Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
| | - Roberto Gotti
- Department of Pharmacy and Biotechnology (FaBiT), University of Bologna, Via Belmeloro 6, 40126 Bologna, Italy
| | - Aldo Roda
- Department of Chemistry "G. Ciamician", University of Bologna, Via Selmi 2, 40126 Bologna, Italy; INBB, National Institute of Biostructure and Biosystems, Viale delle Medaglie d'Oro, Rome, Italy
| | - Marco Candela
- Department of Pharmacy and Biotechnology (FaBiT), University of Bologna, Via Belmeloro 6, 40126 Bologna, Italy
| | - Emanuele Porru
- Department of Medical and Surgical Sciences, University of Bologna, 40138 Bologna, Italy.
| | - Jessica Fiori
- Department of Chemistry "G. Ciamician", University of Bologna, Via Selmi 2, 40126 Bologna, Italy.
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Sahoo MM, Swain JB. Investigation and comparative analysis of ecological risk for heavy metals in sediment and surface water in east coast estuaries of India. MARINE POLLUTION BULLETIN 2023; 190:114894. [PMID: 37018906 DOI: 10.1016/j.marpolbul.2023.114894] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 03/09/2023] [Accepted: 03/25/2023] [Indexed: 06/19/2023]
Abstract
The sediments and surface water from 8 stations each from Dhamara and Paradeep estuarine areas were sampled for investigation of heavy metals, Cd, Cu, Pb, Mn, Ni, Zn, Fe, and Cr contamination. The objective of the sediment and surface water characterization is to find the existing spatial and temporal intercorrelation. The sediment accumulation index (Ised), enrichment index (IEn), ecological risk index (IEcR) and probability heavy metals (p-HMI) reveal the contamination status with Mn, Ni, Zn, Cr, and Cu showing permissible (0 ≤ Ised ≤ 1, IEn ˂ 2, IEcR ≤ 150) to moderate (1 ≤ Ised ≤ 2, 40 ≤ Rf ≤ 80) contamination. The p-HMI reflects the range from excellent (p-HMI = 14.89-14.54) to fair (p-HMI = 22.31-26.56) in off shore stations of the estuary. The spatial patterns of the heavy metals load index (IHMc) along the coast lines indicate that the pollution hotspots are progressively divulged to trace metals pollution over time. Heavy metal source analysis coupled with correlation analysis and principal component analysis (PCA) was used as a data reduction technique, which reveals that the heavy metal pollution in marine coastline might originate from redox reactions (FeMn coupling) and anthropogenic sources.
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Hwang JI, Wilson PC. Absorption, translocation, and metabolism of atrazine, carbamazepine, and sulfamethoxazole by the macrophyte Orange King Humbert canna lily (Canna × generalis L.H. Bailey (pro sp.) [glauca × indica]). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:46282-46294. [PMID: 36719575 DOI: 10.1007/s11356-023-25400-2] [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: 05/26/2022] [Accepted: 01/14/2023] [Indexed: 06/18/2023]
Abstract
Canna × generalis L.H. Bailey (pro sp.) [glauca × indica] (common name: Orange King Humbert canna lily) has been reported as a promising plant species that can effectively remove contaminants of emerging concern (CECs), such as atrazine (ATZ), carbamazepine (CBZ), and sulfamethoxazole (SMX), from contaminated surface water. In the present study, absorption, translocation, and metabolism of such CECs in canna were examined using carbon-14-labeled ([14C]) analogues of each contaminant to understand the removal of each. Uptake/adsorption of the [14C]-CECs increased over time and was > 47.5% at the end of the 14-day study. The root-shoot translocation of [14C]-ATZ in canna was the greatest at 49.9-78.8%, followed by [14C]-CBZ (1.9-44.7%) and [14C]-SMX (3.3-6.0%). The cumulative transpiration of canna was correlated with absorption (R2 > 0.95) and root-shoot translocation (R2 > 0.97) magnitudes of [14C]-CECs in canna. Radiographic results revealed significant conversion of parent [14C]-CECs into other metabolites during the 14-day study. Metabolism of [14C]-ATZ and [14C]-CBZ occurred mainly in the shoots, whereas metabolism of [14C]-SMX occurred in the roots. Taken together, root-shoot redistribution and metabolism of CECs absorbed into canna can vary by transpiration volume as well as chemical properties.
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Affiliation(s)
- Jeong-In Hwang
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, 72701, USA
| | - P Chris Wilson
- Soil, Water, and Ecosystem Sciences Department, University of Florida, Gainesville, FL, 32611, USA.
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10
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Guo Z, Ouyang W, Tulcan RXS, Lin C, He M, Wang B, Xin M. Spatiotemporal partition dynamics of typical herbicides at a turbid river estuary. MARINE POLLUTION BULLETIN 2022; 182:113946. [PMID: 35870360 DOI: 10.1016/j.marpolbul.2022.113946] [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: 04/22/2022] [Revised: 07/08/2022] [Accepted: 07/09/2022] [Indexed: 06/15/2023]
Abstract
Organic pollutants are ubiquitous in estuarine areas, nonetheless, the transport mechanisms of herbicides in such areas are limited. Atrazine and acetochlor were analyzed in suspended particle matter (SPM), surface sediment, and surface water from the Yellow River estuary and the surrounding rivers and sea. Among these rivers, the Yellow River contributes the most herbicide flux to the sea annually. The herbicide concentrations in water and sediment decreased from the estuarine areas to the deep sea. The fugacity fraction values of atrazine exceeded 0.5 in the Yellow River estuary, which supported that the herbicides in sediment desorbed at the estuarine areas. The herbicide in the SPM showed high concentration in the outer sea and increased as a power function with decreasing SPM content. The increasing partition capacity indicated that the herbicides tended to sink into sediment, increasing the ecological risk posed by herbicides. The ecological risk of acetochlor deserves continuous attention.
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Affiliation(s)
- Zewei Guo
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Wei Ouyang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China; Advanced Interdisciplinary Institute of Environment and Ecology, Beijing Normal University, Zhuhai 519087, China.
| | - Roberto Xavier Supe Tulcan
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Chunye Lin
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Mengchang He
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Baodong Wang
- The First Institute of Oceanography, Ministry of Natural Resources, 6 Xianxialing Road, Qingdao 266061, China
| | - Ming Xin
- The First Institute of Oceanography, Ministry of Natural Resources, 6 Xianxialing Road, Qingdao 266061, China
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Santos VS, Anjos JSX, de Medeiros JF, Montagner CC. Impact of agricultural runoff and domestic sewage discharge on the spatial-temporal occurrence of emerging contaminants in an urban stream in São Paulo, Brazil. ENVIRONMENTAL MONITORING AND ASSESSMENT 2022; 194:637. [PMID: 35922699 DOI: 10.1007/s10661-022-10288-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 07/11/2022] [Indexed: 06/15/2023]
Abstract
Ribeirão das Pedras, a 10-km-long stream from the source to mouth, is part of a predominantly urban catchment located in Campinas metropolitan area in the state of São Paulo, Brazil, and it is also surrounded by sugarcane farms. Monthly sampling of 31 selected emerging contaminants (ECs) was conducted for 1 year (October 2018 to October 2019) in five points, including the spring, agricultural, and urban areas, to assess the dynamics and impact of ECs on the stream. The ECs were quantified using LC-MS/MS analysis. Out of the 31 ECs monitored in this study, 13 were detected in the Ribeirão das Pedras catchment, which were mainly pesticides and caffeine. Eight ECs (hexazinone, malathion, desethylatrazine (DEA), desisopropylatrazine (DIA), fipronil, ametryn, 2-hidroxyatrazine, and diuron) were detected with risk quotients higher than 1, indicating some level of environmental concern. Statistical analyses showed that caffeine, hexazinone, atrazine, DEA, and DIA were the most statistically important contaminants in temporal analysis, with caffeine concentrations varying randomly. Hexazinone, atrazine, DIA, and DEA concentrations increased from November 2018 to January 2019, and atrazine, hexazinone, and DEA concentrations increased from June 2019 to September 2019. Spatial analysis indicates that the spring of Ribeirão das Pedras is the only statistically different sampling point, with lower concentrations of EC. Points 3 and 5, both located in urban areas next to the stream's mouth, differ from each other due to the possible dilution of caffeine downstream of point 3 and domestic sewage discharge upstream of point 5.
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Affiliation(s)
- Vinicius S Santos
- Institute of Chemistry, University of Campinas, Campinas, São Paulo, CP, 6154, 13083-970, Brazil
| | - Juliana S X Anjos
- Institute of Chemistry, University of Campinas, Campinas, São Paulo, CP, 6154, 13083-970, Brazil
| | - Jéssyca F de Medeiros
- Institute of Chemistry, University of Campinas, Campinas, São Paulo, CP, 6154, 13083-970, Brazil
| | - Cassiana C Montagner
- Institute of Chemistry, University of Campinas, Campinas, São Paulo, CP, 6154, 13083-970, Brazil.
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