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Shrestha P, Hughes CB, Camenzuli L, Lyon D, Meisterjahn B, Hennecke T, Griffiths M, Hennecke D. Improved closed test setup for biodegradation testing of slightly volatile substances in water-sediment systems (OECD 308). CHEMOSPHERE 2023; 324:138294. [PMID: 36878367 DOI: 10.1016/j.chemosphere.2023.138294] [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: 01/23/2023] [Revised: 03/01/2023] [Accepted: 03/02/2023] [Indexed: 06/18/2023]
Abstract
Standardized biodegradation testing methods, like the OECD 308 Aerobic and Anaerobic Transformation in Aquatic Sediment Systems, generate data on biodegradation required during environmental risk and hazard assessment of chemicals under different European and international regulations. However, difficulties arise when applying the OECD 308 guideline for testing hydrophobic volatile chemicals. Especially the use of a co-solvent (like acetone) as a measure to facilitate the application of the test chemical in combination with a closed setup to reduce losses due to volatilization tend to deplete/restrict the amount of oxygen in the test system. The result is a low oxygen or even anoxic water column in the water-sediment system. Thus, the degradation half-lives of the chemical generated from such tests are not directly comparable to the regulatory half-life values for Persistence assessment of the test chemical. The aim of this work was to further develop the closed setup to improve and maintain aerobic conditions in the water phase of the water-sediment systems for testing slightly volatile hydrophobic test chemicals. This improvement was attained by optimizing the test system geometry and agitation technique to maintain aerobic conditions in the water phase in a closed test setup, investigating appropriate co-solvent application strategy, and trialing the resulting test setup. This study shows that when using a closed test setup for OECD 308 tests, agitation of the water phase overlaying the sediment and the test item application using low co-solvent volume is critical for maintaining an aerobic water layer.
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Affiliation(s)
- Prasit Shrestha
- Fraunhofer IME-AE, Auf dem Aberg 1, 57392, Schmallenberg, Germany.
| | | | - Louise Camenzuli
- ExxonMobil Petroleum and Chemical B.V.B.A., Hermeslaan 2, 1831, Machelen, Belgium
| | - Delina Lyon
- CONCAWE, Boulevard du Souverain, 165B-1160, Brussels, Belgium.
| | | | - Thomas Hennecke
- Fraunhofer IME-AE, Auf dem Aberg 1, 57392, Schmallenberg, Germany
| | | | - Dieter Hennecke
- Fraunhofer IME-AE, Auf dem Aberg 1, 57392, Schmallenberg, Germany
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2
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Wittich RM, Haïdour A, Aguilar-Romero I, de la Torre-Zúñiga J, van Dillewijn P. Biodegradation of Microtoxic Phenylpropanoids (Phenylpropanoic Acid and Ibuprofen) by Bacteria and the Relevance for Their Removal from Wastewater Treatment Plants. Genes (Basel) 2023; 14:442. [PMID: 36833369 PMCID: PMC9956071 DOI: 10.3390/genes14020442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 02/05/2023] [Accepted: 02/07/2023] [Indexed: 02/11/2023] Open
Abstract
The NSAID ibuprofen (2-(4-isobutylphenyl)propanoic acid) and the structurally related 3-phenylpropanoic acid (3PPA), are widely used pharmaceutical and personal care products (PPCPs) which enter municipal waste streams but whose relatively low rates of elimination by wastewater treatment plants (WWTPs) are leading to the contamination of aquatic resources. Here, we report the isolation of three bacterial strains from a municipal WWTP, which as a consortium are capable of mineralizing ibuprofen. These were identified as the Pseudomonas citronellolis species, termed RW422, RW423 and RW424, in which the first two of these isolates were shown to contain the catabolic ipf operon responsible for the first steps of ibuprofen mineralization. These ipf genes which are associated with plasmids could, experimentally, only be transferred between other Sphingomonadaceae species, such as from the ibuprofen degrading Sphingopyxis granuli RW412 to the dioxins degrading Rhizorhabdus wittichii RW1, generating RW421, whilst a transfer from the P. citronellolis isolates to R. wittichii RW1 was not observed. RW412 and its derivative, RW421, as well as the two-species consortium RW422/RW424, can also mineralize 3PPA. We show that IpfF can convert 3PPA to 3PPA-CoA; however, the growth of RW412 with 3PPA produces a major intermediate that was identified by NMR to be cinnamic acid. This and the identification of other minor products from 3PPA allows us to propose the major pathway used by RW412 to mineralize 3PPA. Altogether, the findings in this study highlight the importance of ipf genes, horizontal gene transfer, and alternative catabolic pathways in the bacterial populations of WWTPs to eliminate ibuprofen and 3PPA.
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Affiliation(s)
- Regina-Michaela Wittich
- Department of Environmental Protection, Estación Experimental del Zaidín CSIC, Calle Profesor Albareda 1, 18008 Granada, Spain
| | - Ali Haïdour
- Unidad de Resonancia Magnética Nuclear, Centro de Instrumentación Científica, Universidad de Granada, Paseo Juan Osorio S/N, 18071 Granada, Spain
| | - Inés Aguilar-Romero
- Department of Environmental Protection, Estación Experimental del Zaidín CSIC, Calle Profesor Albareda 1, 18008 Granada, Spain
| | - Jesús de la Torre-Zúñiga
- Department of Environmental Protection, Estación Experimental del Zaidín CSIC, Calle Profesor Albareda 1, 18008 Granada, Spain
| | - Pieter van Dillewijn
- Department of Environmental Protection, Estación Experimental del Zaidín CSIC, Calle Profesor Albareda 1, 18008 Granada, Spain
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Davenport R, Curtis‐Jackson P, Dalkmann P, Davies J, Fenner K, Hand L, McDonough K, Ott A, Ortega‐Calvo JJ, Parsons JR, Schäffer A, Sweetlove C, Trapp S, Wang N, Redman A. Scientific concepts and methods for moving persistence assessments into the 21st century. INTEGRATED ENVIRONMENTAL ASSESSMENT AND MANAGEMENT 2022; 18:1454-1487. [PMID: 34989108 PMCID: PMC9790601 DOI: 10.1002/ieam.4575] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 09/29/2021] [Accepted: 12/06/2021] [Indexed: 05/19/2023]
Abstract
The evaluation of a chemical substance's persistence is key to understanding its environmental fate, exposure concentration, and, ultimately, environmental risk. Traditional biodegradation test methods were developed many years ago for soluble, nonvolatile, single-constituent test substances, which do not represent the wide range of manufactured chemical substances. In addition, the Organisation for Economic Co-operation and Development (OECD) screening and simulation test methods do not fully reflect the environmental conditions into which substances are released and, therefore, estimates of chemical degradation half-lives can be very uncertain and may misrepresent real environmental processes. In this paper, we address the challenges and limitations facing current test methods and the scientific advances that are helping to both understand and provide solutions to them. Some of these advancements include the following: (1) robust methods that provide a deeper understanding of microbial composition, diversity, and abundance to ensure consistency and/or interpret variability between tests; (2) benchmarking tools and reference substances that aid in persistence evaluations through comparison against substances with well-quantified degradation profiles; (3) analytical methods that allow quantification for parent and metabolites at environmentally relevant concentrations, and inform on test substance bioavailability, biochemical pathways, rates of primary versus overall degradation, and rates of metabolite formation and decay; (4) modeling tools that predict the likelihood of microbial biotransformation, as well as biochemical pathways; and (5) modeling approaches that allow for derivation of more generally applicable biotransformation rate constants, by accounting for physical and/or chemical processes and test system design when evaluating test data. We also identify that, while such advancements could improve the certainty and accuracy of persistence assessments, the mechanisms and processes by which they are translated into regulatory practice and development of new OECD test guidelines need improving and accelerating. Where uncertainty remains, holistic weight of evidence approaches may be required to accurately assess the persistence of chemicals. Integr Environ Assess Manag 2022;18:1454-1487. © 2022 The Authors. Integrated Environmental Assessment and Management published by Wiley Periodicals LLC on behalf of Society of Environmental Toxicology & Chemistry (SETAC).
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Affiliation(s)
| | | | - Philipp Dalkmann
- Bayer AG, Crop Science Division, Environmental SafetyMonheimGermany
| | | | - Kathrin Fenner
- Eawag, Swiss Federal Institute of Aquatic Science and TechnologyDübendorfSwitzerland
- Department of ChemistryUniversity of ZürichZürichSwitzerland
| | - Laurence Hand
- Syngenta, Product Safety, Jealott's Hill International Research CentreBracknellUK
| | | | - Amelie Ott
- School of EngineeringNewcastle UniversityNewcastle upon TyneUK
- European Centre for Ecotoxicology and Toxicology of Chemicals (ECETOC)BrusselsBelgium
| | - Jose Julio Ortega‐Calvo
- Instituto de Recursos Naturales y Agrobiología de SevillaConsejo Superior de Investigaciones CientíficasSevillaSpain
| | - John R. Parsons
- Institute for Biodiversity and Ecosystem DynamicsUniversity of AmsterdamAmsterdamThe Netherlands
| | - Andreas Schäffer
- RWTH Aachen University, Institute for Environmental ResearchAachenGermany
| | - Cyril Sweetlove
- L'Oréal Research & InnovationEnvironmental Research DepartmentAulnay‐sous‐BoisFrance
| | - Stefan Trapp
- Department of Environmental EngineeringTechnical University of DenmarkBygningstorvetLyngbyDenmark
| | - Neil Wang
- Total Marketing & ServicesParis la DéfenseFrance
| | - Aaron Redman
- ExxonMobil Petroleum and ChemicalMachelenBelgium
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Li Z, Wang J, Gu C, Guo Y, Wu S. Marine bacteria-mediated abiotic-biotic coupling degradation mechanism of ibuprofen. JOURNAL OF HAZARDOUS MATERIALS 2022; 435:128960. [PMID: 35472552 DOI: 10.1016/j.jhazmat.2022.128960] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 04/13/2022] [Accepted: 04/16/2022] [Indexed: 06/14/2023]
Abstract
Knowledge on the behavior and fate of pharmaceuticals and personal care products (PPCPs) is poorly explored in marine aphotic environment. In this study, the degradation mechanism of a typical PPCPs-ibuprofen (IBP) by a ubiquitous marine Pseudoalteromonas sp. was investigated based on transcriptome and key enzymes analysis. More importantly, a novel enzymatic-nonenzymatic coupling degradation mechanism was uncovered for the first time, namely, the degradation of IBP was firstly initiated by extracellular reactive oxygen species (ROS), then the intermediate (e.g.4-ethylresorcinol) was further degraded by intracellular enzymes. It was showed that biogenic •OH, O2•-and H2O2 were responsible for extracellular nonenzymatic degradation, in which IBP was degraded to 4-ethylresorcinol through hydrogenation, isobutyl moiety cleavage, oxidation and decarboxylation. 4-Hydroxyphenylpyruvate dioxygenase, homogentisate 1,2-dioxygenase, long-chain acyl-CoA synthetase, acetyl-CoA acyltransferase and enoyl-CoA hydratase were identified to be involved in intracellular degradation, leading 4-ethylresorcinol cracked and eventually mineralized. Ultimately, this novel degradation mechanism was demonstrated to be amino acids-driven through KEGG enrichment analysis and experimental data. Overall, our work uncovered a yet undiscovered abiotic-biotic coupling degradation mechanism in PPCPs biotransformation, thereby updating the conventional concept that contaminants transformation is solely accomplished by enzymes or non-enzymes, which can also provide new insights into PPCPs environmental behavior and fate.
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Affiliation(s)
- Zelong 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
| | - Jing 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.
| | - Chen Gu
- Power China Huadong Engineering Corporation Limited, Hangzhou 311122, China
| | - Yali Guo
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Shuo Wu
- 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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Rasool S, Rasool T, Gani KM. A review of interactions of pesticides within various interfaces of intrinsic and organic residue amended soil environment. CHEMICAL ENGINEERING JOURNAL ADVANCES 2022. [DOI: 10.1016/j.ceja.2022.100301] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Cueff S, Alletto L, Dumény V, Benoit P, Pot V. Adsorption and degradation of the herbicide nicosulfuron in a stagnic Luvisol and Vermic Umbrisol cultivated under conventional or conservation agriculture. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:15934-15946. [PMID: 33245539 DOI: 10.1007/s11356-020-11772-2] [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: 07/09/2020] [Accepted: 11/18/2020] [Indexed: 06/11/2023]
Abstract
The main goals of conservation agriculture are to enhance soil fertility and reduce soil degradation, especially through erosion. However, conservation agriculture practices can increase the risk of contamination by pesticides, mainly through vertical transfer via water flow. Better understanding of their sorption and degradation processes is thus needed in conservation agriculture as they control the amount of pesticide available for vertical transfer. The purpose of our study was to investigate the sorption and degradation processes of nicosulfuron in soil profiles (up to 90 cm deep) of a Vermic Umbrisol and a Stagnic Luvisol managed either in conventional or in conservation agriculture. Two laboratory sorption and incubation experiments were performed. Low sorption was observed regardless of the soil type, agricultural management or depth, with a maximum value of 1.3 ± 2.0 L kg-1. By the end of the experiment (91 days), nicosulfuron mineralisation in the Vermic Umbrisol was similar for the two types of agricultural management and rather depended on soil depth (29.0 ± 2.3% in the 0-60-cm layers against 7.5 ± 1.4% in the 60-90 cm). In the Stagnic Luvisol, nicosulfuron mineralisation reached similar value in every layer of the conservation agriculture plot (26.5% ± 0.7%). On the conventional tillage plot, mineralisation decreased in the deepest layer (25-60 cm) reaching only 18.4 ± 6.9% of the applied nicosulfuron. Regardless of the soil type or agricultural management, non-extractable residue formation was identified as the main dissipation process of nicosulfuron (45.1 ± 8.5% and 50.2 ± 7.0% under conventional and conservation agriculture respectively after 91 days). In our study, nicosulfuron behaved similarly in the Vermic Umbrisol regardless of the agricultural management, whereas the risk of transfer to groundwater seemed lower in the Stagnic Luvisol under conservation agriculture.
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Affiliation(s)
- Sixtine Cueff
- Université de Toulouse, INRAE, UMR AGIR, 31326, Castanet-Tolosan, France.
- Université Paris-Saclay, INRAE, AgroParisTech, UMR ECOSYS, 78850, Thiverval-Grignon, France.
| | - Lionel Alletto
- Université de Toulouse, INRAE, UMR AGIR, 31326, Castanet-Tolosan, France.
| | - Valérie Dumény
- Université Paris-Saclay, INRAE, AgroParisTech, UMR ECOSYS, 78850, Thiverval-Grignon, France
| | - Pierre Benoit
- Université Paris-Saclay, INRAE, AgroParisTech, UMR ECOSYS, 78850, Thiverval-Grignon, France
| | - Valérie Pot
- Université Paris-Saclay, INRAE, AgroParisTech, UMR ECOSYS, 78850, Thiverval-Grignon, France
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Effect of Pseudomonas moorei KB4 Cells' Immobilisation on Their Degradation Potential and Tolerance towards Paracetamol. Molecules 2021; 26:molecules26040820. [PMID: 33557429 PMCID: PMC7915102 DOI: 10.3390/molecules26040820] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 01/26/2021] [Accepted: 02/02/2021] [Indexed: 11/17/2022] Open
Abstract
Pseudomonas moorei KB4 is capable of degrading paracetamol, but high concentrations of this drug may cause an accumulation of toxic metabolites. It is known that immobilisation can have a protective effect on bacterial cells; therefore, the toxicity and degradation rate of paracetamol by the immobilised strain KB4 were assessed. Strain KB4 was immobilised on a plant sponge. A toxicity assessment was performed by measuring the concentration of ATP using the colony-forming unit (CFU) method. The kinetic parameters of paracetamol degradation were estimated using the Hill equation. Toxicity analysis showed a protective effect of the carrier at low concentrations of paracetamol. Moreover, a pronounced phenomenon of hormesis was observed in the immobilised systems. The obtained kinetic parameters and the course of the kinetic curves clearly indicate a decrease in the degradation activity of cells after their immobilisation. There was a delay in degradation in the systems with free cells without glucose and immobilised cells with glucose. However, it was demonstrated that the immobilised systems can degrade at least ten succeeding cycles of 20 mg/L paracetamol degradation. The obtained results indicate that the immobilised strain may become a useful tool in the process of paracetamol degradation.
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Holzmann H, Simeoni A, Schäffer A. Influence of chemical charge on the fate of organic chemicals in sediment particle size fractions. CHEMOSPHERE 2021; 265:129105. [PMID: 33261835 DOI: 10.1016/j.chemosphere.2020.129105] [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: 07/27/2020] [Revised: 11/17/2020] [Accepted: 11/22/2020] [Indexed: 06/12/2023]
Abstract
In order to investigate the influence of differently sized particle fractions on the fate of ionic chemicals in water-sediment systems, we performed simulation studies following OECD guideline 308. We used 14C-labelled anionic (4-n-dodecylbenzenesulfonic acid sodium salt, '14C-DS-'), cationic (4-n-dodecylbenzyltrimethyl ammonium chloride, '14C-DA+') and non-ionic (4-n-dodecylphenol, '14C-DP') organic chemicals. The sediment was subjected to particle size fractionation. For each particle fraction and test compound, water-sediment systems were prepared and incubated for 14 days. Across all particle fractions, higher amounts of applied radioactivity (AR) of 14C-DS- (in sand 60.1%, in silt 45.1%, in clay 57.0%) and of 14C-DP (sand: 31.8%, silt: 24.4%, clay: 29.2%) were mineralised compared to 14C-DA+ (sand: 5.1% AR, silt: 3.5% AR, clay: 2.4% AR). The highest bioavailability was observed for 14C-DS- followed by 14C-DP and 14C-DA+ across all particle fractions. Formation of non-extractable residues (NER) of 14C-DS- did not substantially differ between the particle fractions, whereas NER formation of 14C-DA+ was higher in the clay fraction (24.3% AR) than in silt (15.9% AR) and sand (8.4% AR). The same trend was observed for 14C-DP. We showed that differently sized particle fractions have an influence on the fate of ionic chemicals in water-sediment systems and conclude that this should be considered when simulation studies in soils and sediments with different textural compositions are performed. Since a positive charge of organic chemicals tends to form higher portions of NER in the clay fraction of sediments, these NER should be further investigated in terms of their nature and types of binding.
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Affiliation(s)
- Hannah Holzmann
- RWTH Aachen University, Institute for Environmental Research, Worringer Weg 1, 52074, Aachen, Germany.
| | - Andrea Simeoni
- RWTH Aachen University, Institute for Environmental Research, Worringer Weg 1, 52074, Aachen, Germany
| | - Andreas Schäffer
- RWTH Aachen University, Institute for Environmental Research, Worringer Weg 1, 52074, Aachen, Germany; State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing, 210093, PR China; Chongqing University, College of Resources and Environmental Science, Chongqing, PR China
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Tudi M, Daniel Ruan H, Wang L, Lyu J, Sadler R, Connell D, Chu C, Phung DT. Agriculture Development, Pesticide Application and Its Impact on the Environment. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:1112. [PMID: 33513796 PMCID: PMC7908628 DOI: 10.3390/ijerph18031112] [Citation(s) in RCA: 457] [Impact Index Per Article: 152.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 01/13/2021] [Accepted: 01/19/2021] [Indexed: 12/12/2022]
Abstract
Pesticides are indispensable in agricultural production. They have been used by farmers to control weeds and insects, and their remarkable increases in agricultural products have been reported. The increase in the world's population in the 20th century could not have been possible without a parallel increase in food production. About one-third of agricultural products are produced depending on the application of pesticides. Without the use of pesticides, there would be a 78% loss of fruit production, a 54% loss of vegetable production, and a 32% loss of cereal production. Therefore, pesticides play a critical role in reducing diseases and increasing crop yields worldwide. Thus, it is essential to discuss the agricultural development process; the historical perspective, types and specific uses of pesticides; and pesticide behavior, its contamination, and adverse effects on the natural environment. The review study indicates that agricultural development has a long history in many places around the world. The history of pesticide use can be divided into three periods of time. Pesticides are classified by different classification terms such as chemical classes, functional groups, modes of action, and toxicity. Pesticides are used to kill pests and control weeds using chemical ingredients; hence, they can also be toxic to other organisms, including birds, fish, beneficial insects, and non-target plants, as well as air, water, soil, and crops. Moreover, pesticide contamination moves away from the target plants, resulting in environmental pollution. Such chemical residues impact human health through environmental and food contamination. In addition, climate change-related factors also impact on pesticide application and result in increased pesticide usage and pesticide pollution. Therefore, this review will provide the scientific information necessary for pesticide application and management in the future.
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Affiliation(s)
- Muyesaier Tudi
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, No. 11 Datun Road, Beijing 100101, China; (M.T.); (J.L.)
- Centre for Environment and Population Health, School of Medicine, Griffith University, 170 Kessels Road, Nathan, QLD 4111, Australia; (H.D.R.); (R.S.); (C.C.); (D.T.P.)
| | - Huada Daniel Ruan
- Centre for Environment and Population Health, School of Medicine, Griffith University, 170 Kessels Road, Nathan, QLD 4111, Australia; (H.D.R.); (R.S.); (C.C.); (D.T.P.)
- Environmental Science Program, Beijing Normal University-Hong Kong Baptist University United International College, 2000 Jintong Road, Tangjiawan, Zhuhai 519080, China
| | - Li Wang
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, No. 11 Datun Road, Beijing 100101, China; (M.T.); (J.L.)
- Faculty of Health, Medicine and Life Sciences, Maastricht University, 6200 MD Maastricht, The Netherlands
| | - Jia Lyu
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, No. 11 Datun Road, Beijing 100101, China; (M.T.); (J.L.)
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, No. 29 Nanwei Road, Beijing 100050, China
| | - Ross Sadler
- Centre for Environment and Population Health, School of Medicine, Griffith University, 170 Kessels Road, Nathan, QLD 4111, Australia; (H.D.R.); (R.S.); (C.C.); (D.T.P.)
| | - Des Connell
- School of Environment and Science, Griffith University, 170 Kessel Road, Nathan, QLD 4111, Australia;
| | - Cordia Chu
- Centre for Environment and Population Health, School of Medicine, Griffith University, 170 Kessels Road, Nathan, QLD 4111, Australia; (H.D.R.); (R.S.); (C.C.); (D.T.P.)
| | - Dung Tri Phung
- Centre for Environment and Population Health, School of Medicine, Griffith University, 170 Kessels Road, Nathan, QLD 4111, Australia; (H.D.R.); (R.S.); (C.C.); (D.T.P.)
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Ding Y, Li L, Wania F, Zhang Y, Huang H, Liao T, Liu J, Qi S. Formation of non-extractable residues as a potentially dominant process in the fate of PAHs in soil: Insights from a combined field and modeling study on the eastern Tibetan Plateau. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 267:115383. [PMID: 32858438 DOI: 10.1016/j.envpol.2020.115383] [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: 04/26/2020] [Revised: 08/04/2020] [Accepted: 08/04/2020] [Indexed: 06/11/2023]
Abstract
Whereas non-extractable residue (NER) formation is recognized as an important process affecting the ecological risk of organic contaminants in soils, it is commonly neglected in regional-scale multi-media models assessing chemical environmental fate and risk. We used a combined field and modeling study to elucidate the relative importance of NER formation to the reduction in available organic contaminants compared with fate processes commonly considered in risk assessment models (volatilization, leaching, and biodegradation). Specifically, four polycyclic aromatic hydrocarbons (PAHs), i.e., phenanthrene (Phe), pyrene (Pyr), benzo[a]pyrene (BaP), and benzo[ghi]perylene (BghiP), were spiked and measured in a one-year field pot experiment at four sites with diverse environmental conditions on the eastern Tibetan Plateau. The rate of NER formation was derived as the difference between the overall rate of decline in total-extractable PAH concentrations, obtained by fitting a biphasic first-order model to the measured concentrations, and the sum of the calculated rates of volatilization, leaching, and biodegradation. Our work shows that the total-extractable PAH concentration undergoes a rapid decline and a slow decline, with shorter overall half-lives (especially for BaP and BghiP) than those observed in earlier studies. Generally, NER formation was assessed to be the dominant contributor (64 ± 33%) to the overall decline of PAHs, followed by biodegradation (35 ± 32%); volatilization and leaching were the smallest contributors. In particular, heavier PAHs (i.e. BaP and BghiP) tend to have shorter half-lives in the rapid and the overall decline phase, indicating that the erroneous estimation of environmental fate and risks might be more pronounced for organic contaminants with a large molecular size. The trend of overall decline rates of PAHs displayed a combined effect of NER formation and biodegradation. This work indicates the need to consider NER formation as a process in multi-media models of chemical fate and risk.
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Affiliation(s)
- Yang Ding
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, 430074, China; School of Environmental Studies, China University of Geosciences, Wuhan, 430074, China; Department of Physical and Environmental Sciences, University of Toronto Scarborough, Toronto, ON M1C 1A4, Canada.
| | - Li Li
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, Toronto, ON M1C 1A4, Canada; School of Community Health Sciences, University of Nevada, Reno, Reno, NV, 89557, USA
| | - Frank Wania
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, Toronto, ON M1C 1A4, Canada
| | - Yuan Zhang
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, 430074, China
| | - Huanfang Huang
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, 430074, China; School of Environmental Studies, China University of Geosciences, Wuhan, 430074, China; State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China
| | - Ting Liao
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, 430074, China; School of Environmental Studies, China University of Geosciences, Wuhan, 430074, China
| | - Jinhong Liu
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, 430074, China
| | - Shihua Qi
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, 430074, China; School of Environmental Studies, China University of Geosciences, Wuhan, 430074, China.
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Muskus AM, Krauss M, Miltner A, Hamer U, Nowak KM. Degradation of glyphosate in a Colombian soil is influenced by temperature, total organic carbon content and pH. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 259:113767. [PMID: 31887598 DOI: 10.1016/j.envpol.2019.113767] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 12/06/2019] [Accepted: 12/07/2019] [Indexed: 06/10/2023]
Abstract
Glyphosate is one of the most used herbicides in the world. The fate of glyphosate in tropical soils may be different from that in soils from temperate regions. In particular, the amounts and types of non-extractable residues (NER) may differ considerably, resulting in different relative contributions of xenoNER (sorbed and sequestered parent compound) and bioNER (biomass residues of degraders). In addition, environmental conditions and agricultural practices leading to total organic carbon (TOC) or pH variation can alter the degradation of glyphosate. The aim of this study is thus to investigate how the glyphosate degradation and turnover are influenced by varying temperature, pH and TOC of sandy loam soil from Colombia. The pH or TOC of a Colombian soil was modified to yield five treatments: control (pH 7.0, TOC 3%), 4% TOC, 5% TOC, pH 6.5, and pH 5.5. Each treatment received 50 mg kg-1 of 13C315N-glyphosate and was incubated at 10 °C, 20 °C and 30 °C for 40 days. Rising temperature increased the mineralization of 13C315N-glyphosate from 13 to 20% (10 °C) to 32-39% (20 °C) and 41-51% (30 °C) and decreased the amounts of extractable 13C315N-glyphosate after 40 days of incubation from 13 to 26% (10 °C) to 4.6-12% (20 °C) and 1.2-3.2% (30 °C). Extractable 13C315N-glyphosate increased with higher TOC and higher pH. Total 13C-NER were similar in all treatments and at all temperatures (47%-60%), indicating that none of the factors studied affected the amount of total 13C-NER. However, 13C-bioNER dominated within the 13C-NER pool in the control and the 4% TOC treatment (76-88% of total 13C-NER at 20 °C and 30 °C), whereas in soil with 5% TOC and pH 6.5 or 5.5 13C-bioNER were lower (47-61% at 20 °C and 30 °C). In contrast, the 15N-bioNER pool was small (between 14 and 39% of the 15N-NER). Thus, more than 60% of 15N-NER is potentially hazardous xenobiotic NER which need careful attention in the future.
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Affiliation(s)
- Angelica M Muskus
- UFZ - Helmholtz-Centre for Environmental Research, Department of Environmental Biotechnology, Permoserstr. 15, 04318, Leipzig, Germany; Institute of Landscape Ecology, University of Münster, Heisenbergstr. 2, 48149, Münster, Germany; Pontifical Bolivarian University, Environmental Engineering Faculty, Km 7 Vía Piedecuesta, Bucaramanga, Colombia
| | - Martin Krauss
- UFZ - Helmholtz-Centre for Environmental Research, Department of Effect-Directed Analysis, Permoserstr. 15, 04318, Leipzig, Germany
| | - Anja Miltner
- UFZ - Helmholtz-Centre for Environmental Research, Department of Environmental Biotechnology, Permoserstr. 15, 04318, Leipzig, Germany
| | - Ute Hamer
- Institute of Landscape Ecology, University of Münster, Heisenbergstr. 2, 48149, Münster, Germany
| | - Karolina M Nowak
- Chair of Geobiotechnology, Technische Universität Berlin, Ackerstraße 76, 13355, Berlin, Germany.
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12
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Zhu X, Dsikowitzky L, Ricking M, Schwarzbauer J. Molecular insights into the formation and remobilization potential of nonextractable anthropogenic organohalogens in heterogeneous environmental matrices. JOURNAL OF HAZARDOUS MATERIALS 2020; 381:120959. [PMID: 31401459 DOI: 10.1016/j.jhazmat.2019.120959] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 07/31/2019] [Accepted: 08/02/2019] [Indexed: 06/10/2023]
Abstract
Anthropogenic organohalogens (AOHs) are toxic and persistent pollutants that occur ubiquitously in the environment. An unneglectable portion of them can convert into nonextractable residues (NER) in the natural solid substances. NER-AOHs are not detectable by conventional solvent-extraction, and will get remobilized through changes of surrounding environment. Consequently, the formation and fate of NER-AOHs should be investigated comprehensively. In this study, solvent extraction, sequential chemical degradation and thermochemolysis were applied on different sample matrices (sediments, soils and groundwater sludge, collected from industrial areas) to release extractable and nonextractable AOHs. Covalent linkages were observed most favorable for the hydrophilic-group-containing monocyclic aromatic AOHs (HiMcAr-AOHs) (e.g. halogenated phenols, benzoic acids and anilines) incorporating into the natural organic matter (NOM) as NER. Physical entrapment mainly contributed to the NER formation of hydrophobic monocyclic aromatic AOHs (HoMcAr-AOHs) and polycyclic aromatic AOHs (PcAr-AOHs). The hypothesized remobilization potential of these NER-AOHs follow the order HiMcAr-AOHs > HoMcAr-AOHs/ aliphatic AOHs > PcAr-AOHs. In addition, the NOM macromolecular structures of the studied samples were analyzed. Based on the derived results, a conceptual model of the formation mechanisms of NER-AOHs is proposed. This model provides basic molecular insights that are of high value for risk assessment and remediation of AOHs.
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Affiliation(s)
- Xiaojing Zhu
- Institute of Geology and Geochemistry of Petroleum and Coal, RWTH Aachen University, Lochnerstr. 4-20, 52064 Aachen, Germany
| | - Larissa Dsikowitzky
- Institute of Geology and Geochemistry of Petroleum and Coal, RWTH Aachen University, Lochnerstr. 4-20, 52064 Aachen, Germany
| | - Mathias Ricking
- Dpt Wastewater Technology Research, German Environment Agency, Corrensplatz 1, 14195 Berlin, Germany
| | - Jan Schwarzbauer
- Institute of Geology and Geochemistry of Petroleum and Coal, RWTH Aachen University, Lochnerstr. 4-20, 52064 Aachen, Germany.
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13
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Claßen D, Siedt M, Nguyen KT, Ackermann J, Schaeffer A. Formation, classification and identification of non-extractable residues of 14C-labelled ionic compounds in soil. CHEMOSPHERE 2019; 232:164-170. [PMID: 31154176 DOI: 10.1016/j.chemosphere.2019.05.038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 05/03/2019] [Accepted: 05/04/2019] [Indexed: 06/09/2023]
Abstract
The influence of an ionic functional group on the fate of chemicals in the environment, especially the formation of non-extractable residues (NER), has not been systematically investigated. Using 4-n-dodecylphenol[phenylring-14C(U)], 4-n-dodecylbenzenesulfonicacid[phenylring-14C(U)] sodiumsalt (14C-DS-) and 4-n-dodecylbenzyltrimethylammoniumchloride[phenylring-14C(U)] (14C-DA+) all with a high structural similarity, the formation, classification and identification of NER of negatively (14C-DS-), positively (14C-DA+) and uncharged (14C-DP) chemicals were investigated in a sterilized and non-sterilized soil. After 84 days of incubation in non-sterile soil, 40.6%, 21.7% and 33.5% of the applied radioactivity (AR) of 14C-DP, 14C-DS- and 14C-DA+, respectively, were converted to NER. In contrast, in sterile soil NER formation was markedly lower. The NER were further investigated with respect to sequestered, covalently bound and biogenic residues (i.e. NER types I, II, and III). Silylation of 14C-DP, 14C-DS- and 14C-DA+ derived NER released 3.0-23.2% AR, indicating that these were sequestered, whereas the residual NER (12.9-33.1% AR) was covalently bound to the soil. Analysis of extracts derived by silylation showed that 14C-DP, but neither 14C-DS- nor 14C-DA+, were released by silylation, suggesting that DP might be part of the sequestered NER. Acid hydrolysis of the NER containing soil and subsequent analysis of soil extracts for 14C-aminoacids indicated that 2.5-23.8% AR were biogenic residues. Most DP and DS- derived NER were biogenically or covalently bound, whereas DA+ predominantly forms sequestered NER in soil. From these results we propose that chemicals forming high amounts of NER should be investigated regarding types I-III NER because sequestered parent compounds should be considered in persistence assessments.
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Affiliation(s)
- Daniela Claßen
- RWTH Aachen University, Institute for Environmental Research, Worringer Weg 1, 52074, Aachen, Germany; German Environment Agency (UBA), Section Chemicals, Wörlitzer Platz 1, 06844, Dessau-Roßlau, Germany
| | - Martin Siedt
- RWTH Aachen University, Institute for Environmental Research, Worringer Weg 1, 52074, Aachen, Germany
| | - Kim Thu Nguyen
- RWTH Aachen University, Institute for Environmental Research, Worringer Weg 1, 52074, Aachen, Germany
| | - Juliane Ackermann
- German Environment Agency (UBA), Section Chemicals, Wörlitzer Platz 1, 06844, Dessau-Roßlau, Germany
| | - Andreas Schaeffer
- RWTH Aachen University, Institute for Environmental Research, Worringer Weg 1, 52074, Aachen, Germany; State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210093, PR China; Chongqing University, College of Resources and Environmental Science, Chongqing, PR China.
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14
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Brock AL, Rein A, Polesel F, Nowak KM, Kästner M, Trapp S. Microbial Turnover of Glyphosate to Biomass: Utilization as Nutrient Source and Formation of AMPA and Biogenic NER in an OECD 308 Test. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:5838-5847. [PMID: 30994338 DOI: 10.1021/acs.est.9b01259] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Environmental fate assessment of chemicals involves standardized simulation tests with isotope-labeled molecules to balance transformation, mineralization, and formation of nonextractable residues (NER). Methods to predict microbial turnover and biogenic NER have been developed, having limited use when metabolites accumulate, the chemicals are not the only C source, or provide for other macroelements. To improve predictive capability, we extended a recently developed method for microbial growth yield estimation to account for incomplete degradation and multiple-element assimilation and combined it with a dynamic model for fate description in soils and sediments. We evaluated the results against the unique experimental data of 13C3-15N co-labeled glyphosate turnover with AMPA formation in water-sediment systems (OECD 308). Balancing 13C- and 15N- fluxes to biomass showed a pronounced shift of glyphosate transformation from full mineralization to AMPA formation. This may be explained by various hypotheses, for example, the limited substrate turnover inherent to the batch conditions of the test system causing microbial starvation or inhibition by P release. Modeling results indicate initial N overload due to the lower C/N ratio in glyphosate compared to average cell composition leading to subsequent C demand and accumulation of AMPA.
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Affiliation(s)
- Andreas Libonati Brock
- Department of Environmental Engineering , Technical University of Denmark , Bygningstorvet 115 , 2800 Kgs . Lyngby , Denmark
| | - Arno Rein
- Chair of Hydrogeology , Technical University of Munich , Arcisstrasse 21 , Munich 80333 , Germany
| | - Fabio Polesel
- Department of Environmental Engineering , Technical University of Denmark , Bygningstorvet 115 , 2800 Kgs . Lyngby , Denmark
| | - Karolina M Nowak
- Department of Environmental Biotechnology , Helmholtz-Centre for Environmental Research-UFZ , Permoserstrasse 15 , 04318 Leipzig , Germany
| | - Matthias Kästner
- Department of Environmental Biotechnology , Helmholtz-Centre for Environmental Research-UFZ , Permoserstrasse 15 , 04318 Leipzig , Germany
| | - Stefan Trapp
- Department of Environmental Engineering , Technical University of Denmark , Bygningstorvet 115 , 2800 Kgs . Lyngby , Denmark
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15
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Zhu Q, Wu Y, Zeng J, Wang X, Zhang T, Lin X. Influence of bacterial community composition and soil factors on the fate of phenanthrene and benzo[a]pyrene in three contrasting farmland soils. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 247:229-237. [PMID: 30677667 DOI: 10.1016/j.envpol.2018.12.079] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 12/24/2018] [Accepted: 12/25/2018] [Indexed: 06/09/2023]
Abstract
The fate of polycyclic aromatic hydrocarbons (PAHs) determines their potential risk in soil, which may be directly affected by abiotic conditions and indirectly through the changes in decomposer communities. In comparison, the indirect effects on the fate remain largely elusive. In this study, the fate of phenanthrene and benzo[a]pyrene and the corresponding bacterial changes were investigated in three contaminated farmland soils using a 14C tracer method and Miseq sequencing. The results showed that most benzo[a]pyrene was consistently extractable with dichloromethane (DCM) after the 60-day incubation (60.4%-78.2%), while phenanthrene was mainly mineralized to CO2 during the 30-day incubation (40.4%-58.7%). Soils from Guangzhou (GZ) showed a different distribution pattern of 14C-PAHs exemplified by low mineralization and disparate bound residue formation. The PAH fate in the Shenyang (SY) and Nanjing (NJ) soils were similar to each other than to that in the GZ soil. The fate in the GZ soil seemed to be linked to the distinct edaphic properties, such as organic matter content, however soil microbial community could have influenced the distribution pattern of PAHs. This potential role of microorganisms was reflected by the unique changes in the copy numbers of Gram positive RHDα gene, and by the distinct shifts in bacterial community composition during the incubation. A quite different shift in bacterial communities was found in the GZ microcosms which may influence PAH mineralization and non-extractable residue (NER) formation.
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Affiliation(s)
- Qinghe Zhu
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yucheng Wu
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jun Zeng
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Xingxiang Wang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Taolin Zhang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiangui Lin
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
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16
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Muskus AM, Krauss M, Miltner A, Hamer U, Nowak KM. Effect of temperature, pH and total organic carbon variations on microbial turnover of 13C 315N-glyphosate in agricultural soil. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 658:697-707. [PMID: 30580222 DOI: 10.1016/j.scitotenv.2018.12.195] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2018] [Revised: 12/12/2018] [Accepted: 12/13/2018] [Indexed: 06/09/2023]
Abstract
Glyphosate is the best-selling and the most-used broad-spectrum herbicide worldwide. Microbial conversion of glyphosate to CO2 and biogenic non-extractable residues (bioNER) leads to its complete degradation. The degradation of glyphosate may vary in different soils and it depends on environmental conditions and soil properties. To date, the influence of temperature, soil pH and total organic carbon (TOC) on microbial conversion of glyphosate to bioNER has not been investigated yet. The pH or TOC of an agricultural original soil (pH 6.6, TOC 2.1%) was modified using sulfuric acid or farmyard manure (FYM), respectively. Each treatment: original (I), 3% TOC (II), 4% TOC (III), pH 6.0 (IV) and pH 5.5 (V) was amended with 13C315N-glyphosate and incubated at 10 °C, 20 °C and 30 °C for 39 days. The temperature was the main factor controlling the mineralization and the extractable 13C315N-glyphosate, whereas higher TOC content and lower pH resulted in enhanced formation of 13C-bioNER. After 39 days the cumulative mineralization of 13C-glyphosate was in the range of 12-22% (10 °C), 37-47% (20 °C) and 43-54% (30 °C). Extractable residues of 13C-glyphosate were in the range of 10-21% (10 °C) and 4-10% (20 °C and 30 °C); whereas those of 15N-glyphosate were as follows 20-32% (10 °C) and 12-25% (20 °C and 30 °C). The 13C-NER comprised about 53-69% of 13C-mass balance in soils incubated at 10 °C, but 40-50% in soils incubated at 20 °C and 30 °C. The 15N-NER were higher than the 13C-NER and varied between 62% and 74% at 10 °C, between 53% and 81% at 20 °C and 30 °C. A major formation of 13C-bioNER (72-88% of 13C-NER) at 20 °C and 30 °C was noted in soil amended with FYM. An increased formation of 15N-bioNER (14-17% of 15N-NER) was also observed in FYM-amended soil. The xenobiotic 15N-NER had a major share within the 15N-NER and thus need to be considered when assessing the environmental risk of glyphosate-NER.
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Affiliation(s)
- Angelica M Muskus
- Helmholtz-Centre for Environmental Research - UFZ, Department of Environmental Biotechnology, Permoserstr. 15, 04318 Leipzig, Germany; Institute of Landscape Ecology, University of Münster, Heisenbergstr. 2, 48149 Münster, Germany; Pontifical Bolivarian University, Environmental Engineering Faculty, Km 7 Vía Piedecuesta, Bucaramanga, Colombia
| | - Martin Krauss
- Helmholtz-Centre for Environmental Research - UFZ, Department of Effect-Directed Analysis, Permoserstr. 15, 04318 Leipzig, Germany
| | - Anja Miltner
- Helmholtz-Centre for Environmental Research - UFZ, Department of Environmental Biotechnology, Permoserstr. 15, 04318 Leipzig, Germany
| | - Ute Hamer
- Institute of Landscape Ecology, University of Münster, Heisenbergstr. 2, 48149 Münster, Germany
| | - Karolina M Nowak
- Chair of Geobiotechnology, Technische Universität Berlin, Ackerstraße 76, 13355 Berlin, Germany.
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17
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Goulas A, Sertillanges N, Brimo K, Garnier P, Bergheaud V, Dumény V, Benoit P, Haudin CS. Environmental availability of sulfamethoxazole and its acetylated metabolite added to soils via sludge compost or bovine manure. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 651:506-515. [PMID: 30243170 DOI: 10.1016/j.scitotenv.2018.09.100] [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: 05/10/2018] [Revised: 09/07/2018] [Accepted: 09/08/2018] [Indexed: 06/08/2023]
Abstract
The fate of antibiotics and their metabolites in soils after application of organic waste depends on their environmental availability, which depends on the quality and biodegradability of the added exogenous organic matter (EOM). This study aimed at better understanding the fate of sulfamethoxazole (SMX) and N-acetyl-sulfamethoxazole (AcSMX) metabolite added to soils via sludge compost or cow manure application, during a 28-day incubation. Experimental results obtained for mineralized, extractable, and non-extractable fractions as well as EOM mineralization were used to couple SMX and AcSMX dynamics to the EOM evolution using the COP-Soil model. According to various mechanisms of extraction, CaCl2, EDTA and cyclodextrin solutions extracted contrasted available fractions (31-96% on day 0), resulting in different sets of parameter values in the model. CaCl2 extraction was the best method to assess the sulfonamide availability, leading to low relative root mean squared errors and best simulations of SMX and AcSMX dynamics. The decrease of SMX and AcSMX availability over time went with the formation of non-extractable residues, mostly of physicochemical origin. Using the COP-Soil model, the co-metabolism was assumed to be responsible for the formation of biogenic non-extractable residues and the low mineralization of SMX and AcSMX.
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Affiliation(s)
- Anaïs Goulas
- UMR ECOSYS, INRA, AgroParisTech, Université Paris-Saclay, 78850 Thiverval-Grignon, France
| | - Nicolas Sertillanges
- UMR ECOSYS, INRA, AgroParisTech, Université Paris-Saclay, 78850 Thiverval-Grignon, France
| | - Khaled Brimo
- UMR ECOSYS, INRA, AgroParisTech, Université Paris-Saclay, 78850 Thiverval-Grignon, France
| | - Patricia Garnier
- UMR ECOSYS, INRA, AgroParisTech, Université Paris-Saclay, 78850 Thiverval-Grignon, France
| | - Valérie Bergheaud
- UMR ECOSYS, INRA, AgroParisTech, Université Paris-Saclay, 78850 Thiverval-Grignon, France
| | - Valérie Dumény
- UMR ECOSYS, INRA, AgroParisTech, Université Paris-Saclay, 78850 Thiverval-Grignon, France
| | - Pierre Benoit
- UMR ECOSYS, INRA, AgroParisTech, Université Paris-Saclay, 78850 Thiverval-Grignon, France
| | - Claire-Sophie Haudin
- UMR ECOSYS, INRA, AgroParisTech, Université Paris-Saclay, 78850 Thiverval-Grignon, France.
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18
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Shrestha P, Meisterjahn B, Klein M, Mayer P, Birch H, Hughes CB, Hennecke D. Biodegradation of Volatile Chemicals in Soil: Separating Volatilization and Degradation in an Improved Test Setup (OECD 307). ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:20-28. [PMID: 30507175 DOI: 10.1021/acs.est.8b05079] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
During environmental risk assessments of chemicals, higher-tier biodegradation tests in soil, sediment, and surface-water systems are required using OECD standards 307, 308, and 309 guidelines, respectively. These guidelines are not suitable for testing highly volatile chemicals, and a biometer closed-incubation setup is recommended for testing slightly volatile chemicals. In this setup, the degradation kinetics of highly volatile chemicals can largely be influenced by volatilization. Additionally, guidelines lack sufficient information on test-system geometry and guidance on how to measure and maintain aerobic conditions during the test. Our objectives were (1) to design a closed test setup for biodegradation tests in soil in which the maintaining and measuring of aerobic conditions was possible without the loss of volatile test chemicals and (2) to suggest data-treatment measures for evaluating the degradation kinetics of volatile test chemicals. With the new setup, full-scale OECD 307 tests were performed using the volatile 14C-labeled chemicals decane and tetralin. For both test chemicals, reproducible complete mass balances were observed, and the new setup ensured that the volatilization losses were kept below the mineralized fraction. Based on the obtained data, an extended model was developed that enabled consideration of the volatilization in the modeling of degradation kinetics.
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Affiliation(s)
- Prasit Shrestha
- Fraunhofer IME-AE , Auf dem Aberg 1 , 57392 Schmallenberg Germany
- Department of Environmental Engineering , Technical University Denmark , 2800 Kongens Lyngby , Denmark
| | | | - Michael Klein
- Fraunhofer IME-AE , Auf dem Aberg 1 , 57392 Schmallenberg Germany
| | - Philipp Mayer
- Department of Environmental Engineering , Technical University Denmark , 2800 Kongens Lyngby , Denmark
| | - Heidi Birch
- Department of Environmental Engineering , Technical University Denmark , 2800 Kongens Lyngby , Denmark
| | | | - Dieter Hennecke
- Fraunhofer IME-AE , Auf dem Aberg 1 , 57392 Schmallenberg Germany
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19
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Zeng H, Gao M, Shen T, Ding F. Organo silica nanosheets with gemini surfactants for rapid adsorption of ibuprofen from aqueous solutions. J Taiwan Inst Chem Eng 2018. [DOI: 10.1016/j.jtice.2018.07.038] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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20
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Nowak KM, Telscher M, Seidel E, Miltner A. Unraveling microbial turnover and non-extractable residues of bromoxynil in soil microcosms with 13C-isotope probing. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 242:769-777. [PMID: 30031310 DOI: 10.1016/j.envpol.2018.07.049] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Revised: 07/01/2018] [Accepted: 07/11/2018] [Indexed: 06/08/2023]
Abstract
Bromoxynil is a widely used nitrile herbicide applied to maize and other cereals in many countries. To date, still little is known about bromoxynil turnover and the structural identity of bromoxynil non-extractable residues (NER) which are reported to occur in high amounts. Therefore, we investigated the microbial turnover of 13C-labeled bromoxynil for 32 days. A focus was laid on the estimation of biogenic NER based on the turnover of 13C into amino acids (AA). At the end, 25% of 13C6-bromoxynil equivalents were mineralized, 2% assigned to extractable residues and 72.5% to NER. Based on 12% in the 13C-total AA and an assumed share of AA of 50% in microbial biomass we arrived at 24% of total 13C-biogenic NER. About 33% of the total 13C-NER could thus be explained by 13C-biogenic NER; 67% was unknown and by definition xenobiotic NER with potential for toxicity. The 13C label from 13C6-bromoxynil was mainly detected in the humic acids (28.5%), but significant amounts were also found in non-humics (17.6%), fulvic acids (13.2%) and humins (12.7%). The 13C-total amino acids hydrolyzed from humic acids, humins and fulvic acids amounted to 5.2%, 6.1% and 1.2% of 13C6-bromoxynil equivalents, respectively, corresponding to total 13C-biogenic NER amounts of 10.4%, 12.2% and 2.4%. The humins contained mostly 13C-biogenic NER, whereas the humic and fulvic acids may be dominated by the xenobiotic NER. Due to the high proportion of unknown 13C-NER and particularly in the humic and fulvic acids, future studies should focus on the detailed characterization of these fractions.
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Affiliation(s)
- Karolina M Nowak
- Chair of Geobiotechnology, Technische Universität Berlin, Ackerstraße 76, 13355 Berlin, Germany; Helmholtz-Centre for Environmental Research - UFZ, Department of Environmental Biotechnology, Permoserstr. 15, 04318 Leipzig, Germany.
| | - Markus Telscher
- Bayer CropScience AG, Alfred-Nobel-Str. 50, 40789 Monheim am Rhein, Germany
| | - Erika Seidel
- Bayer CropScience AG, Alfred-Nobel-Str. 50, 40789 Monheim am Rhein, Germany
| | - Anja Miltner
- Helmholtz-Centre for Environmental Research - UFZ, Department of Environmental Biotechnology, Permoserstr. 15, 04318 Leipzig, Germany
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21
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Brimo K, Ouvrard S, Houot S, Lafolie F, Garnier P. Modelling the fate of PAH added with composts in amended soil according to the origin of the exogenous organic matter. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 616-617:658-668. [PMID: 29100691 DOI: 10.1016/j.scitotenv.2017.10.269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 10/25/2017] [Accepted: 10/26/2017] [Indexed: 06/07/2023]
Abstract
A new model that was able to simulate the behaviours of polycyclic aromatic hydrocarbons (PAH) during composting and after the addition of the composts to agricultural soil is presented here. This model associates modules that describe the physical, biological and biochemical processes involved in PAH dynamics in soils, along with a module describing the compost degradation resulting in PAH release. The model was calibrated from laboratory incubations using three 14C-PAHs, phenanthrene, fluoranthene and benzo(a)pyrene, and three different composts consisting of two mature and one non-mature composts. First, the labelled PAHs were added to the compost over 28days, and spiked composts were then added to the soil over 55days. The model calculates the proportion of biogenic and physically bound residues in the non-extractable compartment of PAHs at the end of the compost incubation to feed the initial conditions of the model for soil amended with composts. For most of the treatments, a single parameter set enabled to simulate the observed dynamics of PAHs adequately for all the amended soil treatments using a Bayesian approach. However, for fluoranthene, different parameters that were able to simulate the growth of a specific microbial biomass had to be considered for mature compost. Processes that occurred before the compost application to the soil strongly influenced the fate of PAHs in the soil. Our results showed that the PAH dissipation during compost incubation was higher in mature composts because of the higher specific microbial activity, while the PAH dissipation in amended soil was higher in the non-mature compost because of the higher availability of PAHs and the higher co-metabolic microbial activity.
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Affiliation(s)
- Khaled Brimo
- UMR EcoSys, INRA, AgroParisTech, Université Paris-Saclay, 78850 Thiverval-Grignon, France; UMR Laboratoire Sols et Environnement, INRA, Université de Lorraine, 54518 Vandoeuvre-lès-Nancy, France; Agence de l'Environnement et de la Maîtrise de l'Energie, 20 avenue du Grésillé, BP 90406, F-49004 Angers Cedex 01, France
| | - Stéphanie Ouvrard
- UMR Laboratoire Sols et Environnement, INRA, Université de Lorraine, 54518 Vandoeuvre-lès-Nancy, France
| | - Sabine Houot
- UMR EcoSys, INRA, AgroParisTech, Université Paris-Saclay, 78850 Thiverval-Grignon, France
| | | | - Patricia Garnier
- UMR EcoSys, INRA, AgroParisTech, Université Paris-Saclay, 78850 Thiverval-Grignon, France.
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Trapp S, Brock AL, Nowak K, Kästner M. Prediction of the Formation of Biogenic Nonextractable Residues during Degradation of Environmental Chemicals from Biomass Yields. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:663-672. [PMID: 29214805 DOI: 10.1021/acs.est.7b04275] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Degradation tests with radio or stable isotope labeled compounds enable the detection of the formation of nonextractable residues (NER). In PBT and vPvB assessment, remobilisable NER are considered as a potential risk while biogenic NER from incorporation of labeled carbon into microbial biomass are treated as degradation products. Relationships between yield, released CO2 (as indicator of microbial activity and mineralization) and microbial growth can be used to estimate the formation of biogenic NER. We provide a new approach for calculation of potential substrate transformation to microbial biomass (theoretical yield) based on Gibbs free energy and microbially available electrons. We compare estimated theoretical yields of biotechnological substrates and of chemicals of environmental concern with experimentally determined yields for validation of the presented approach. A five-compartment dynamic model is applied to simulate experiments of 13C-labeled 2,4-D and ibuprofen turnover. The results show that bioNER increases with time, and that most bioNER originates from microbial proteins. Simulations with precalculated input data demonstrate that precalculation of yields reduces the number of fit parameters considerably, increases confidence in fitted kinetic data, and reduces the uncertainty of the simulation results.
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Affiliation(s)
- Stefan Trapp
- Department of Environmental Engineering, Technical University of Denmark , Bygningstorvet bd. 115, DK-2800 Kgs. Lyngby, Denmark
| | - Andreas Libonati Brock
- Department of Environmental Engineering, Technical University of Denmark , Bygningstorvet bd. 115, DK-2800 Kgs. Lyngby, Denmark
| | - Karolina Nowak
- Helmholtz-Centre for Environmental Research - UFZ , Department of Environmental Biotechnology, Permoserstrasse 15, 04318 Leipzig, Germany
| | - Matthias Kästner
- Helmholtz-Centre for Environmental Research - UFZ , Department of Environmental Biotechnology, Permoserstrasse 15, 04318 Leipzig, Germany
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Schäffer A, Kästner M, Trapp S. A unified approach for including non-extractable residues (NER) of chemicals and pesticides in the assessment of persistence. ENVIRONMENTAL SCIENCES EUROPE 2018; 30:51. [PMID: 30613459 PMCID: PMC6297198 DOI: 10.1186/s12302-018-0181-x] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2018] [Accepted: 12/04/2018] [Indexed: 05/18/2023]
Abstract
All chemicals form non-extractable residues (NER) to various extents in environmental media like soil, sediment, plants and animals. NER can be quantified in environmental fate studies using isotope-labeled (such as 14C or 13C) tracer compounds. Previous NER definitions have led to a mismatch of legislation and state of knowledge in research: the residues are assumed to be either irreversibly bound degradation products or at least parts of these residues can be released. In the latter assumption, soils and sediments are a long-term source of slowly released residues. We here present a conceptual experimental and modeling approach to characterize non-extractable residues and provide guidance how they should be considered in the persistence assessment of chemicals and pesticides. Three types of NER can be experimentally discriminated: sequestered and entrapped residues (type I), containing either the parent substance or xenobiotic transformation products or both and having the potential to be released, which has indeed been observed. Type II NER are residues that are covalently bound to organic matter in soils or sediments or to biological tissue in organisms and that are considered being strongly bound with very low remobilization rates like that of humic matter degradation rates. Type III NER comprises biogenic NER (bioNER) after degradation of the xenobiotic chemical and anabolic formation of natural biomolecules like amino acids and phospholipids, and other biomass compounds. We developed the microbial turnover to biomass (MTB) model to predict the formation of bioNER based on the structural properties of chemicals. Further, we proposed an extraction sequence to obtain a matrix containing only NER. Finally, we summarized experimental methods to distinguish the three NER types. Type I NER and type II NER should be considered as potentially remobilizable residues in persistence assessment but the probability of type II release is much lower than that of type I NER, i.e., type II NER in soil are "operationally spoken" irreversibly bound and can be released only in minute amounts and at very slow rates, if at all. The potential of remobilization can be evaluated by chemical, physical and biological methods. BioNER are of no environmental concern and, therefore, can be assessed as such in persistence assessment. The general concept presented is to consider the total amount of NER minus potential bioNER as the amount of xenoNER, type I + II. If a clear differentiation of type I and type II is possible, for the calculation of half-life type I NER are considered as not degraded parent substance or transformation product(s). On the contrary, type II NER may generally be considered as (at least temporarily) removed. Providing proof for type II NER is the most critical issue in NER assessment and requires additional research. If no characterization and additional information on NER are available, it is recommended to assess the total amount as potentially remobilizable. We propose our unified approach of NER characterization and evaluation to be implemented into the persistence and environmental hazard assessment strategies for REACH chemicals and biocides, human and veterinary pharmaceuticals, and pesticides, irrespective of the different regulatory frameworks.
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Affiliation(s)
- Andreas Schäffer
- Institute for Environmental Research, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
| | - Matthias Kästner
- Department Environmental Biotechnology, Helmholtz Centre for Environmental Research, UFZ, Permoserstraße15, 04318 Leipzig, Germany
| | - Stefan Trapp
- Department of Environmental Engineering, Technical University of Denmark, Bygningstorvet bd. 115, 2800 Kongens Lyngby, Denmark
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24
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Zhang M, Whiting SA, Clark BJ. Application of kinetic modeling to predict the fate of two indoxacarb metabolites and their bound residues in soil. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 607-608:829-837. [PMID: 28711844 DOI: 10.1016/j.scitotenv.2017.07.024] [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: 03/22/2017] [Revised: 06/03/2017] [Accepted: 07/03/2017] [Indexed: 06/07/2023]
Abstract
Insecticide indoxacarb metabolites JT333 and MP819 were used as model compounds to assess the utilization of kinetic modeling to elucidate metabolic pathways, determine degradation kinetics of non-extractable residues (NER) and predict the accumulation potential of the released NER in soil. Soil adsorption coefficients and degradation product formation were determined in different soils in laboratory. Inverse kinetic modeling was applied to explore the dynamics of dissipation of parent (P), formation of extractable metabolites (MET), NER and CO2, and to identify their routes of degradation in soil. These two compounds share similar structural characteristics, have high affinity to soil (Koc>5000L/kg), short half-life (DT50 of 4-9days), and significant CO2 formation in soil. However, kinetic modeling showed that they degraded via different pathways. The P-MET-CO2 conversion route was the major degradation pathway for JT333 in aerobic soil. Multiple pathways were involved in MP819 degradation, while the formation of NER was predominant. The time-exposure area under the curves (AUC) for the MET or NER in soils were derived from the time-%concentration plots for the evaluation of rate limiting steps in their degradation pathways. In P-MET-CO2 pathway the MET-CO2 conversion is the rate limiting step for both compounds. Higher P-MET conversion/MET-CO2 conversion rate constant ratio resulted in larger MET AUC. The rate of NER degradation appeared much slower compared to the rates of P-MET and MET-CO2 conversions, likely due to the rate-limiting step of NER release from the bound-state, indicating that in this situation the free-state NER would be unlikely to accumulate in soil. The study reported here demonstrates the utility of kinetic modeling to quantify the dynamics of NER formation/dissipation vs. P-MET-CO2 conversion, and the application of kinetic modeling to predict the possibility of free-sate NER accumulation in soil, therefore, reveals the potential for the quantitative NER environmental risk assessment.
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Affiliation(s)
- Minli Zhang
- E. I. du Pont de Nemours and Company, 1090 Elkton Road, Newark, DE 19711, USA.
| | - Sara A Whiting
- EAG Laboratories, Inc., 4780 Discovery Drive, Columbia, MO 65201, USA
| | - Brett J Clark
- EAG Laboratories, Inc., 4780 Discovery Drive, Columbia, MO 65201, USA
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Marchlewicz A, Guzik U, Smułek W, Wojcieszyńska D. Exploring the Degradation of Ibuprofen by Bacillus thuringiensis B1(2015b): The New Pathway and Factors Affecting Degradation. Molecules 2017; 22:molecules22101676. [PMID: 28991215 PMCID: PMC6151734 DOI: 10.3390/molecules22101676] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 10/06/2017] [Indexed: 11/29/2022] Open
Abstract
Ibuprofen is one of the most often detected pollutants in the environment, particularly at landfill sites and in wastewaters. Contamination with pharmaceuticals is often accompanied by the presence of other compounds which may influence their degradation. This work describes the new degradation pathway of ibuprofen by Bacillus thuringiensis B1(2015b), focusing on enzymes engaged in this process. It is known that the key intermediate which transformation limits the velocity of the degradation process is hydroxyibuprofen. As the degradation rate also depends on various factors, the influence of selected heavy metals and aromatic compounds on ibuprofen degradation by the B1(2015b) strain was examined. Based on the values of non-observed effect concentration (NOEC) it was found that the toxicity of tested metals increases from Hg(II) < Cu(II) < Cd(II) < Co(II) < Cr(VI). Despite the toxic effect of metals, the biodegradation of ibuprofen was observed. The addition of Co2+ ions into the medium significantly extended the time necessary for the complete removal of ibuprofen. It was shown that Bacillus thuringiensis B1(2015b) was able to degrade ibuprofen in the presence of phenol, benzoate, and 2-chlorophenol. Moreover, along with the removal of ibuprofen, degradation of phenol and benzoate was observed. Introduction of 4-chlorophenol into the culture completely inhibits degradation of ibuprofen.
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Affiliation(s)
- Ariel Marchlewicz
- Department of Biochemistry, Faculty of Biology and Environmental Protection, University of Silesia in Katowice, Jagiellońska 28, 40-032 Katowice, Poland.
| | - Urszula Guzik
- Department of Biochemistry, Faculty of Biology and Environmental Protection, University of Silesia in Katowice, Jagiellońska 28, 40-032 Katowice, Poland.
| | - Wojciech Smułek
- Institute of Chemical Technology and Engineering, Poznan University of Technology, Berdychowo 4, 60-965 Poznan, Poland.
| | - Danuta Wojcieszyńska
- Department of Biochemistry, Faculty of Biology and Environmental Protection, University of Silesia in Katowice, Jagiellońska 28, 40-032 Katowice, Poland.
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Wang Y, Xu J, Shan J, Ma Y, Ji R. Fate of phenanthrene and mineralization of its non-extractable residues in an oxic soil. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 224:377-383. [PMID: 28216135 DOI: 10.1016/j.envpol.2017.02.017] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 02/06/2017] [Accepted: 02/07/2017] [Indexed: 06/06/2023]
Abstract
The fate of organic pollutants in the environment, especially the formation and stability of non-extractable (i.e., bound) residues (NERs) determines their environmental risk. Using 14C-tracers, we studied the fate of the carcinogen phenanthrene in active or sterilized oxic loamy soil in the absence and presence of the geophagous earthworm Metaphire guillelmi and characterized the NERs derived from phenanthrene. After incubation of 14C-phenanthrene in active soil for 28 days, 40 ± 3.1% of the initial amount was mineralized and 70.1 ± 1.9% was converted to NERs. Most of the NERs (>92%) were bound to soil humin. Silylation of the humin-bound residues released 45.3 ± 5.3% of these residues, which indicated that they were physically entrapped, whereas the remainder of the residues were chemically bound or biogenic. By contrast, in sterilized soil, only 43.4 ± 12.6% of the phenanthrene was converted to NERs and all of these residues were completely released upon silylation, which underlines the essential role of microbial activity in NER formation. The presence of M. guillelmi in active soil significantly inhibited phenanthrene mineralization (24.4 ± 2.6% mineralized), but NER formation was not significantly affected. Only a small amount of phenanthrene-derived residues (1.9-5.3% of the initial amount) accumulated in the earthworm body. When humin-bound residues were mixed with fresh soil, 33.9% (humin recovered from active soils) and 12.4% (humin recovered from sterilized soils) of the residues were mineralized after 75 days of incubation, respectively, which indicated a high bioavailability of NERs, albeit lower than the initial addition of phenanthrene. Our results indicated that many phenanthrene-derived NERs, especially those physically entrapped, are still bioavailable and may pose a toxic threat to soil organisms.
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Affiliation(s)
- Yongfeng Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, 210023 Nanjing, China
| | - Jun Xu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, 210023 Nanjing, China
| | - Jun Shan
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, 210023 Nanjing, China; State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, 210008 Nanjing, China
| | - Yini Ma
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, 210023 Nanjing, China.
| | - Rong Ji
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, 210023 Nanjing, China; Institute for Marine Science, Nanjing University, 163 Xianlin Avenue, 210023 Nanjing, China
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27
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Botero LR, Mougin C, Peñuela G, Barriuso E. Formation of 2,4-D bound residues in soils: New insights into microbial metabolism. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 584-585:715-722. [PMID: 28131449 DOI: 10.1016/j.scitotenv.2017.01.105] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Revised: 01/16/2017] [Accepted: 01/16/2017] [Indexed: 06/06/2023]
Abstract
The microbial contribution to the formation of bound residues in soils is studied by characterizing the metabolic activity of three microorganisms (Trametes versicolor, Fusarium solani and Ralstonia eutropha) on 14C-2,4-dichlorophenoxyacetic acid (2,4-D) during incubation in synthetic liquid media and soil. A fractionation protocol was applied to quantify the 14C-2,4-D that was incorporated into the biomass among biomolecular-like fractions. Successive fractionation of microbial biomass was implemented to break up and quantify the methanol/dichloromethane fraction (corresponding to the 14C-lipid-like fraction), the trichloroacetic acid fraction (or hydrolysed 14C-polysaccharide-like fraction) and the acid hydrolysable fraction (or the hydrolysed 14C-protein-like fraction). Relevant differences in the 2,4-D degradation and biomass radioactivity distribution among the three microorganisms were found. The 14C-protein-like fraction was the most consistent biomass fraction for reflecting the pesticide use capacity of the microorganisms under liquid and soil conditions. 2,4-D and its metabolite 4-chlorophenol were detected in methanol/dichloromethane and trichloroacetic acid fractions of the biomass of microorganisms exhibiting a low capacity to mineralize 2,4-D, thus proving that the microbial participation in the formation of bound residues while conserving the initial pesticide structure under natural soil conditions may be intimately associated with the lipid- and polysaccharide-like constituents. The fractionation protocol differentiates between 14C that is incorporated into biomass as a biomolecular constituent and the pesticide or its metabolites that accumulate in the biomass and thus correspond to the stricto sensu definition of bound residues.
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Affiliation(s)
- Liliana Rocío Botero
- Grupo de Investigaciones y Mediciones Ambientales, Universidad de Medellín, Carrera 87 No. 30-65, Medellín, Colombia
| | - Chistian Mougin
- UMR ECOSYS, INRA, AgroParisTech, Université Paris-Saclay, 78026 Versailles, France
| | - Gustavo Peñuela
- Grupo Diagnóstico y Control de la Contaminación, Sede de Investigación Universitaria, Universidad de Antioquia, Calle 62 No. 52-59, Medellín, Colombia
| | - Enrique Barriuso
- UMR ECOSYS, INRA, AgroParisTech, Université Paris-Saclay, 78850 Thiverval-Grignon, France.
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Wang S, Miltner A, Kästner M, Schäffer A, Nowak KM. Transformation of metamitron in water-sediment systems: Detailed insight into the biodegradation processes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 578:100-108. [PMID: 27839759 DOI: 10.1016/j.scitotenv.2016.10.125] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 10/16/2016] [Accepted: 10/17/2016] [Indexed: 05/22/2023]
Abstract
Metamitron and its main metabolite desamino-metamitron are frequently detected in surface waters. To date, there are no studies targeting metamitron degradation in water-sediment systems. Therefore, the aim of this study was to trace the fate of metamitron in a water-sediment system using 13C-isotope labeling. Mineralization of metamitron was high and accounted for 49% of 13C6-metamitron equivalents at the end. In contrast, only 8.7% of 13C6-metamitron equivalents were mineralized in the water only system demonstrating the key role of sediment for biodegradation. Metamitron disappeared from the water on day 40 and was completely removed from the sediment on day 80. This agrochemical was utilized as carbon source by microorganisms as shown by the incorporation of the 13C label into microbial amino acids and finally into biogenic residues. The latter amounted to 24% of 13C6-metamitron equivalents at the end. However, 17% of 13C6-metamitron equivalents were detected in xenobiotic non-extractable residues (NER) with a release potential and delayed risk for the environment. Metamitron was degraded via two pathways, initially via 4-(dimethylimino)-3-methyl-6-phenyl-1,2,4-triazin-5(4H)-one, which might be related to growth, and later via desamino-metamitron, which can be attributed to starvation.
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Affiliation(s)
- Shizong Wang
- Helmholtz-Centre for Environmental Research - UFZ, Department of Environmental Biotechnology, Permoserstr, 15, 04318 Leipzig, Germany; School of Water Resources and Environment, China University of Geosciences, Beijing, Beijing 100083, PR China
| | - Anja Miltner
- Helmholtz-Centre for Environmental Research - UFZ, Department of Environmental Biotechnology, Permoserstr, 15, 04318 Leipzig, Germany
| | - Matthias Kästner
- Helmholtz-Centre for Environmental Research - UFZ, Department of Environmental Biotechnology, Permoserstr, 15, 04318 Leipzig, Germany
| | - Andreas Schäffer
- RWTH Aachen University, Institute for Environmental Research, Worringerweg 1, 52074 Aachen, Germany
| | - Karolina M Nowak
- Helmholtz-Centre for Environmental Research - UFZ, Department of Environmental Biotechnology, Permoserstr, 15, 04318 Leipzig, Germany; RWTH Aachen University, Institute for Environmental Research, Worringerweg 1, 52074 Aachen, Germany.
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29
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Li R, Dörfler U, Munch JC, Schroll R. Enhanced degradation of isoproturon in an agricultural soil by a Sphingomonas sp. strain and a microbial consortium. CHEMOSPHERE 2017; 168:1169-1176. [PMID: 27817898 DOI: 10.1016/j.chemosphere.2016.10.084] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Revised: 10/05/2016] [Accepted: 10/22/2016] [Indexed: 06/06/2023]
Abstract
Isoproturon (IPU) degradation in an agricultural soil inoculated with an isolated IPU-degrader strain (Sphingomonas sp. strain AK1, IS) or a microbial consortium (MC) harboring this strain, with or without carrier material, were investigated in soil microcosm experiments during 46 days. Effect of the carrier material and inoculation size on IPU-degradation efficacy of the inoculants were studied. Mineralization, extractable residues and non-extractable residues of 14C-labeled IPU were analyzed. The low IPU mineralization in untreated soil (7.0%) was enhanced to different extents by inoculation of IS (17.4%-46.0%) or MC (58.9%-67.5%). Concentrations of IPU residues in soils amended with MC (0.002-0.095 μg g dry soil-1) were significantly lower than in soils amended with IS (0.02-0.67 μg g dry soil-1) and approximately 10 times lower than in the uninoculated soil (0.06-0.80 μg g dry soil-1). Less extractable residues and non-extractable residues were detected in soil with higher IPU mineralization. Inoculation size (as indicated by the volume of liquid cultures or by the number of carrier particles) determined the IPU-removal efficacy of IS in soil, but this effect was less pronounced for MC. The low sorption of IPU to soil and the decreasing IPU-mineralizing rates suggested incapability of IS to establish the IPU-mineralizing function in the soil. The thorough removal of IPU and persistent IPU-mineralizing activity of soil inoculated with MC indicated a high persistence of IPU-metabolic trait. Our results showed that microbial consortia might be more efficient than single degrader strains to enhance clean-up of organic chemicals in soil.
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Affiliation(s)
- Renyi Li
- Research Unit Microbe-Plant Interactions, Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH), 85764 Neuherberg, Germany.
| | - Ulrike Dörfler
- Research Unit Microbe-Plant Interactions, Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH), 85764 Neuherberg, Germany
| | - Jean Charles Munch
- Lehrstuhl für Grünlandlehre, Technische Universität München, 85764 Neuherberg, Germany
| | - Reiner Schroll
- Research Unit Microbe-Plant Interactions, Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH), 85764 Neuherberg, Germany.
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30
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Wang S, Miltner A, Nowak KM. Identification of degradation routes of metamitron in soil microcosms using 13C-isotope labeling. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 220:927-935. [PMID: 27823863 DOI: 10.1016/j.envpol.2016.10.078] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Revised: 10/20/2016] [Accepted: 10/26/2016] [Indexed: 06/06/2023]
Abstract
Metamitron is one of the most commonly used herbicide in sugar beet and flower bulb cultures. Numerous laboratory and field studies on sorption and degradation of metamitron were performed. Detailed biodegradation studies in soil using 13C-isotope labeling are still missing. Therefore, we aimed at providing a detailed turnover mass balance of 13C6-metamitron in soil microcosms over 80 days. In the biotic system, metamitron mineralized rapidly, and 13CO2 finally constituted 60% of the initial 13C6-metamitron equivalents. In abiotic control experiments CO2 rose to only 7.4% of the initial 13C6-metamitron equivalents. The 13C label from 13C6-metamitron was incorporated into microbial amino acids that were ultimately stabilized in the soil organic matter forming presumably harmless biogenic residues. Finally, 13C label from 13C6-metamitron was distributed between the 13CO2 and the 13C-biogenic residues indicating nearly complete biodegradation. The parallel increase of 13C-alanine, 13C-glutamate and 13CO2 indicates that metamitron was initially biodegraded via the desamino-metamitron route suggesting its relevance in the growth metabolism. In later phases of biodegradation, the "Rhodococcus route" was indicated by the low 13CO2 evolution and the high relevance of the pyruvate pathway, which aims at biomolecule synthesis and seems to be related to starvation. This is a first report on the detailed degradation route of metamitron in soil.
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Affiliation(s)
- Shizong Wang
- Helmholtz-Centre for Environmental Research - UFZ, Department of Environmental Biotechnology, Permoserstr. 15, 04318 Leipzig, Germany; School of Water Resources and Environment, China University of Geosciences, Beijing 100083, PR China
| | - Anja Miltner
- Helmholtz-Centre for Environmental Research - UFZ, Department of Environmental Biotechnology, Permoserstr. 15, 04318 Leipzig, Germany
| | - Karolina M Nowak
- Helmholtz-Centre for Environmental Research - UFZ, Department of Environmental Biotechnology, Permoserstr. 15, 04318 Leipzig, Germany; RWTH Aachen University, Institute for Environmental Research, Worringerweg 1, 52074 Aachen, Germany.
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31
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Cycoń M, Borymski S, Żołnierczyk B, Piotrowska-Seget Z. Variable Effects of Non-steroidal Anti-inflammatory Drugs (NSAIDs) on Selected Biochemical Processes Mediated by Soil Microorganisms. Front Microbiol 2016; 7:1969. [PMID: 28018307 PMCID: PMC5147054 DOI: 10.3389/fmicb.2016.01969] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Accepted: 11/24/2016] [Indexed: 12/20/2022] Open
Abstract
Non-steroidal anti-inflammatory drugs (NSAIDs) are the most frequently used group of pharmaceuticals. The high consumption and the uncontrolled disposal of unused drugs into municipal waste or their deposit in landfills can result in an increased concentration of these compounds in soils. Moreover, these drugs can affect the microbial activity. However, there is a lack of knowledge about these effects or it is very limited. Therefore, the objective of this study was to compare the impact of selected commercially available NSAIDs, i.e., diclofenac (DCF), naproxen (NPX), ibuprofen (IBF) and ketoprofen (KTP), applied at concentrations of 1 and 10 mg/kg soil, on the activity of soil microorganisms during the 90-day experiment. To ascertain this impact, substrate-induced respiration (SIR), soil enzyme activities, i.e., dehydrogenase (DHA), acid and alkaline phosphatases (PHOS-H and PHOS-OH) and urease (URE) as well as changes in the rates of nitrification and ammonification processes were determined. In addition, the number of culturable bacteria and fungi were enumerated. In general, the obtained data showed a significant stimulatory effect of NSAIDs on the microbial activity. Higher concentrations of NSAIDs caused a greater effect, which was observed for SIR, PHOS-H, PHOS-OH, URE, N-NO3- and N-NH4+, even during the whole incubation period. Moreover, the number of heterotrophic bacteria and fungi increased significantly during the experiment, which was probably a consequence of the evolution of specific microorganisms that were capable of degrading NSAIDs and used them as an additional source of carbon and energy. However, an inhibitory effect of NPX, IBF or KTP for SIR, DHA, on both phosphatases and culturable bacteria and fungi was observed at the beginning of the experiment. At lower concentrations of NSAIDs, in turn, the effects were negligible or transient. In conclusion, the application of NSAIDs altered the biochemical and microbial activity of soil what may cause the disturbance in soil functioning. It is reasonable to assume that some components of the NSAID formulations could stimulate soil microorganisms, thus resulting in an increase in biochemical activities of the soil.
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Affiliation(s)
- Mariusz Cycoń
- Department of Microbiology and Virology, School of Pharmacy with the Division of Laboratory Medicine, Medical University of SilesiaSosnowiec, Poland
| | | | - Bartłomiej Żołnierczyk
- Department of Microbiology and Virology, School of Pharmacy with the Division of Laboratory Medicine, Medical University of SilesiaSosnowiec, Poland
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Kästner M, Nowak KM, Miltner A, Schäffer A. (Multiple) Isotope probing approaches to trace the fate of environmental chemicals and the formation of non-extractable ‘bound’ residues. Curr Opin Biotechnol 2016; 41:73-82. [DOI: 10.1016/j.copbio.2016.05.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Revised: 05/12/2016] [Accepted: 05/16/2016] [Indexed: 10/21/2022]
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Wang S, Seiwert B, Kästner M, Miltner A, Schäffer A, Reemtsma T, Yang Q, Nowak KM. (Bio)degradation of glyphosate in water-sediment microcosms - A stable isotope co-labeling approach. WATER RESEARCH 2016; 99:91-100. [PMID: 27140906 DOI: 10.1016/j.watres.2016.04.041] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 04/15/2016] [Accepted: 04/16/2016] [Indexed: 06/05/2023]
Abstract
Glyphosate and its metabolite aminomethylphosphonic acid (AMPA) are frequently detected in water and sediments. Up to date, there are no comprehensive studies on the fate of glyphosate in water-sediment microcosms according to OECD 308 guideline. Stable isotope co-labeled (13)C3(15)N-glyphosate was used to determine the turnover mass balance, formation of metabolites, and formation of residues over a period of 80 days. In the water-sediment system, 56% of the initial (13)C3-glyphosate equivalents was ultimately mineralized, whereas the mineralization in the water system (without sediment) was low, reaching only 2% of (13)C-glyphosate equivalents. This finding demonstrates the key role of sediments in its degradation. Glyphosate was detected below detection limit in the water compartment on day 40, but could still be detected in the sediments, ultimately reaching 5% of (13)C3(15)N-glyphosate equivalents. A rapid increase in (13)C(15)N-AMPA was noted after 10 days, and these transformation products ultimately constituted 26% of the (13)C3-glyphosate equivalents and 79% of the (15)N-glyphosate equivalents. In total, 10% of the (13)C label and 12% of the (15)N label were incorporated into amino acids, indicating no risk bearing biogenic residue formation from (13)C3(15)N-glyphosate. Initially, glyphosate was biodegraded via the sarcosine pathway related to microbial growth, as shown by co-labeled (13)C(15)N-glycine and biogenic residue formation. Later, degradation via AMPA dominated under starvation conditions, as shown by the contents of (13)C-glycine. The presented data provide the first evidence of the speciation of the non-extractable residues as well as the utilization of glyphosate as a carbon and nitrogen source in the water-sediment system. This study also highlights the contribution of both the sarcosine and the AMPA degradation pathways under these conditions.
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Affiliation(s)
- Shizong Wang
- School of Water Resources and Environment, China University of Geosciences, Beijing 100083, PR China; Helmholtz-Centre for Environmental Research - UFZ, Department of Environmental Biotechnology, Permoserstrasse 15, 04318 Leipzig, Germany
| | - Bettina Seiwert
- Helmholtz-Centre for Environmental Research - UFZ, Department of Analytical Chemistry, Permoserstrasse 15, 04318 Leipzig, Germany
| | - Matthias Kästner
- Helmholtz-Centre for Environmental Research - UFZ, Department of Environmental Biotechnology, Permoserstrasse 15, 04318 Leipzig, Germany
| | - Anja Miltner
- Helmholtz-Centre for Environmental Research - UFZ, Department of Environmental Biotechnology, Permoserstrasse 15, 04318 Leipzig, Germany
| | - Andreas Schäffer
- RWTH Aachen University, Institute for Environmental Research, Worringerweg 1, 52074 Aachen, Germany
| | - Thorsten Reemtsma
- Helmholtz-Centre for Environmental Research - UFZ, Department of Analytical Chemistry, Permoserstrasse 15, 04318 Leipzig, Germany
| | - Qi Yang
- School of Water Resources and Environment, China University of Geosciences, Beijing 100083, PR China
| | - Karolina M Nowak
- Helmholtz-Centre for Environmental Research - UFZ, Department of Environmental Biotechnology, Permoserstrasse 15, 04318 Leipzig, Germany; RWTH Aachen University, Institute for Environmental Research, Worringerweg 1, 52074 Aachen, Germany.
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Dodgen LK, Zheng W. Effects of reclaimed water matrix on fate of pharmaceuticals and personal care products in soil. CHEMOSPHERE 2016; 156:286-293. [PMID: 27179428 DOI: 10.1016/j.chemosphere.2016.04.109] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 03/22/2016] [Accepted: 04/25/2016] [Indexed: 06/05/2023]
Abstract
Reclaimed water is increasingly used to supplement water resources. However, reclaimed water has a complex matrix, which includes emerging chemical contaminants, that is introduced to the soil when this water is used for irrigation. The effects of microbial activity, dissolved matter, nutrients, and particulate matter in reclaimed water on half-life of 11 pharmaceutical and personal care products (PPCPs) in soil were investigated with 7 treatment waters, namely swine lagoon effluent (either unaltered, sterilized, or filtered and sterilized) and nanopure water (either unaltered or with added nitrogen, phosphorus, or potassium). The extractable residues of the parent PPCPs were measured over 35 d. Lagoon microbial activity was significantly (p ≤ 0.05) related to increased half-life of 4 PPCPs (carbamazepine, fluoxetine, ibuprofen, sulfamethoxazole) by 14-74%, and to decreased half-life of 3 others (caffeine, gemfibrozil, naproxen) by 13-25%. The presence of lagoon dissolved matter was significantly correlated with a 20-110% increase in half-life for 6 PPCPs (caffeine, estrone, gemfibrozil, ibuprofen, naproxen, triclocarban). However, lagoon particulate matter was significantly correlated with 9-52% decrease in half-life for these same compounds, as well as trimethoprim. The levels of nitrogen, phosphorous, and potassium in the lagoon effluent were not significantly related to half-life for most PPCPs, except caffeine. Overall, specific components of reclaimed water matrix had different effects on the soil half-lives of PPCPs, suggesting that the composition of reclaimed water needs to be considered when evaluating PPCP fate after land application.
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Affiliation(s)
- L K Dodgen
- Illinois Sustainable Technology Center, Prairie Research Institute, University of Illinois, Urbana-Champaign, IL 61820, USA.
| | - W Zheng
- Illinois Sustainable Technology Center, Prairie Research Institute, University of Illinois, Urbana-Champaign, IL 61820, USA
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Shrestha P, Junker T, Fenner K, Hahn S, Honti M, Bakkour R, Diaz C, Hennecke D. Simulation Studies to Explore Biodegradation in Water-Sediment Systems: From OECD 308 to OECD 309. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:6856-64. [PMID: 27337495 DOI: 10.1021/acs.est.6b01095] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Studies according to OECD 308 and OECD 309 are performed to simulate the biodegradation of chemicals in water-sediment systems in support of persistence assessment and exposure modeling. However, several shortcomings of OECD 308 have been identified that hamper data evaluation and interpretation, and its relation to OECD 309 is still unclear. The present study systematically compares OECD 308 and OECD 309 and two variants thereof to derive recommendations on how to experimentally address any shortcomings and improve data for persistence and risk assessment. To this end, four (14)C-labeled compounds with different biodegradation and sorption behavior were tested across standard OECD 308 and 309 test systems and two modified versions thereof. The well-degradable compounds showed slow equilibration and the least mineralization in OECD 308, whereas the modified systems provided the highest degree of mineralization. Different lines of evidence suggest that this was due to increased oxygenation of the sediment in the modified systems. Particularly for rapidly degrading compounds, non-extractable residue formation was in line with degradation and did not follow the sediment-water ratio. For the two more slowly degrading compounds, sorption in OECD 309 (standard and modified) increased with time beyond levels proposed by equilibrium partitioning, which could be attributed to the grinding of the sediment through the stirring of the sediment suspension. Overall, the large differences in degradation observed across the four test systems suggest that refined specifications in test guidelines are required to reduce variability in test outcomes. At the same time, the amount of sediment and its degree of oxygenation emerged as drivers across all test systems. This suggests that a unified description of the systems was possible and would pave the way toward a more consistent consideration of degradation in the water-sediment systems across different exposure situations and regulatory frameworks.
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Affiliation(s)
- Prasit Shrestha
- Fraunhofer IME-AE , Auf dem Aberg 1, 57392 Schmallenberg, Germany
| | - Thomas Junker
- ECT Oekotoxikologie GmbH , Böttgerstrasse 2-14, 65439 Flörsheim am Main, Germany
| | - Kathrin Fenner
- Eawag, Swiss Federal Institute of Aquatic Science and Technology , Überlandstrasse 133, 8600 Dübendorf, Switzerland
| | - Stefan Hahn
- Fraunhofer ITEM , Nikolai-Fuchs-Strasse 1, 30625 Hannover, Germany
| | - Mark Honti
- MTA-BME Water Research Group, Hungarian Academy of Sciences , Mügyetem rkp. 3, 1111 Budapest, Hungary
| | - Rani Bakkour
- Eawag, Swiss Federal Institute of Aquatic Science and Technology , Überlandstrasse 133, 8600 Dübendorf, Switzerland
| | - Cecilia Diaz
- Fraunhofer IME-AE , Auf dem Aberg 1, 57392 Schmallenberg, Germany
| | - Dieter Hennecke
- Fraunhofer IME-AE , Auf dem Aberg 1, 57392 Schmallenberg, Germany
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Poßberg C, Schmidt B, Nowak K, Telscher M, Lagojda A, Schaeffer A. Quantitative Identification of Biogenic Nonextractable Pesticide Residues in Soil by (14)C-Analysis. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:6415-6422. [PMID: 27192605 DOI: 10.1021/acs.est.6b00689] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Quantification of nonextractable residues (NER) of pesticides in soil is feasible by use of radioactively labeled compounds, but structural information on these long-term stabilized residues is usually lacking. Microorganisms incorporate parts of the radiolabeled ((14)C-) carbon from contaminants into microbial biomass, which after cell death enters soil organic matter, thus forming biogenic nonextractable residues (bioNER). The formation of bioNER is not yet determinable in environmental fate studies due to a lack of methodology. This paper focuses on the development of a feasible analytical method to quantify proteinaceous carbon, since proteins make up the largest mass portion of bacterial cells. The test substance (14)C-bromoxynil after 56 days forms more than 70% of NER in soil. For further characterization of NER the amino acids were extracted, purified, and separated by two-dimensional thin-layer chromatography (TLC). Visualization of the (14)C-amino acids was performed by bioimaging, unambiguous identification by GC-MS and LC-MS/MS. Our analysis revealed that after 56 days of incubation about 14.5% of the (14)C-label of bromoxynil was incorporated in amino acids. Extrapolating this content based on the amount of proteins in the biomass (55%), in total about 26% of the NER is accounted for by bioNER and thus is not environmentally relevant.
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Affiliation(s)
- Claudia Poßberg
- RWTH Aachen University , Institute for Environmental Research (Biology 5), Worringer Weg 1, 52074 Aachen, Germany
| | - Burkhard Schmidt
- RWTH Aachen University , Institute for Environmental Research (Biology 5), Worringer Weg 1, 52074 Aachen, Germany
| | - Karolina Nowak
- RWTH Aachen University , Institute for Environmental Research (Biology 5), Worringer Weg 1, 52074 Aachen, Germany
- Helmholtz-Centre for Environmental Research - UFZ , Department of Environmental Biotechnology, 04318 Leipzig, Germany
| | - Markus Telscher
- Bayer CropScience AG, Alfred-Nobel-Str. 50, 40789 Monheim am Rhein, Germany
| | - Andreas Lagojda
- Bayer CropScience AG, Alfred-Nobel-Str. 50, 40789 Monheim am Rhein, Germany
| | - Andreas Schaeffer
- RWTH Aachen University , Institute for Environmental Research (Biology 5), Worringer Weg 1, 52074 Aachen, Germany
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University , Nanjing 210093, P. R. China
- College of Resources and Environmental Science, Chongqing University , Chongqing 400030, P. R. China
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Mukherjee S, Tappe W, Weihermueller L, Hofmann D, Köppchen S, Laabs V, Schroeder T, Vereecken H, Burauel P. Dissipation of bentazone, pyrimethanil and boscalid in biochar and digestate based soil mixtures for biopurification systems. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 544:192-202. [PMID: 26657365 DOI: 10.1016/j.scitotenv.2015.11.111] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Revised: 11/09/2015] [Accepted: 11/23/2015] [Indexed: 06/05/2023]
Abstract
Biopurification systems, such as biofilters, are biotechnological tools to prevent point sources of pesticide pollution stemming from on-farm operations. For the purification processes pesticide sorption and mineralization and/or dissipation are essential and both largely depend on the type of filling materials and the pesticide in use. In this paper the mineralization and dissipation of three contrasting (14)C-labeled pesticides (bentazone, boscalid, and pyrimethanil) were investigated in laboratory incubation experiments using sandy soil, biochar produced from Pine woodchips, and/or digestate obtained from anaerobic digestion process using maize silage, chicken manure, beef and pig urine as feedstock. The results indicate that the addition of digestate increased pesticide mineralization, whereby the mineralization was not proportional to the digestate loads in the mixture, indicating a saturation effect in the turnover rate of pesticides. This effect was in correlation with the amount of water extractable DOC, obtained from the digestate based mixtures. Mixing biochar into the soil generally reduced total mineralization and led to larger sorption/sequestration of the pesticides, resulting in faster decrease of the extractable fraction. Also the addition of biochar to the soil/digestate mixtures reduced mineralization compared to the digestate alone mixture but mineralization rates were still higher as for the biochar/soil alone. In consequence, the addition of biochar to the soil generally decreased pesticide dissipation times and larger amounts of biochar led to high amounts of non-extractable residues of pesticide in the substrates. Among the mixtures tested, a mixture of digestate (5%) and biochar (5%) gave optimal results with respect to mineralization and simultaneous sorption for all three pesticides.
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Affiliation(s)
- Santanu Mukherjee
- Institute of Bio- and Geosciences (IBG-3), Agrosphere Institute, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany.
| | - Wolfgang Tappe
- Institute of Bio- and Geosciences (IBG-3), Agrosphere Institute, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Lutz Weihermueller
- Institute of Bio- and Geosciences (IBG-3), Agrosphere Institute, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Diana Hofmann
- Institute of Bio- and Geosciences (IBG-3), Agrosphere Institute, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Stephan Köppchen
- Institute of Bio- and Geosciences (IBG-3), Agrosphere Institute, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Volker Laabs
- BASF SE, Crop Protection, 67117, Limburgerhof, Germany
| | - Tom Schroeder
- BASF SE, Crop Protection, 67117, Limburgerhof, Germany
| | - Harry Vereecken
- Institute of Bio- and Geosciences (IBG-3), Agrosphere Institute, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Peter Burauel
- Sustainable Campus, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
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Degradation of 13C-labeled pyrene in soil-compost mixtures and fertilized soil. Appl Microbiol Biotechnol 2015. [DOI: 10.1007/s00253-015-6822-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Redmile-Gordon MA, Armenise E, Hirsch PR, Brookes PC. Biodiesel Co-Product (BCP) Decreases Soil Nitrogen (N) Losses to Groundwater. WATER, AIR, AND SOIL POLLUTION 2014; 225:1831. [PMID: 24578584 PMCID: PMC3928511 DOI: 10.1007/s11270-013-1831-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Accepted: 11/28/2013] [Indexed: 05/31/2023]
Abstract
This study compares a traditional agricultural approach to minimise N pollution of groundwater (incorporation of crop residues) with applications of small amounts of biodiesel co-product (BCP) to arable soils. Loss of N from soil to the aqueous phase was shown to be greatly reduced in the laboratory, mainly by decreasing concentrations of dissolved nitrate-N. Increases in soil microbial biomass occurred within 4 days of BCP application-indicating rapid adaptation of the soil microbial community. Increases in biomass-N suggest that microbes were partly mechanistic in the immobilisation of N in soil. Straw, meadow-grass and BCP were subsequently incorporated into experimental soil mesocosms of depth equal to plough layer (23 cm), and placed in an exposed netted tunnel to simulate field conditions. Leachate was collected after rainfall between the autumn of 2009 and spring of 2010. Treatment with BCP resulted in less total-N transferred from soil to water over the entire period, with 32.1, 18.9, 13.2 and 4.2 mg N kg-1 soil leached cumulatively from the control, grass, straw and BCP treatments, respectively. More than 99 % of nitrate leaching was prevented using BCP. Accordingly, soils provided with crop residues or BCP showed statistically significant increases in soil N and C compared to the control (no incorporation). Microbial biomass, indicated by soil ATP concentration, was also highest for soils given BCP (p < 0.05). These results indicate that field-scale incorporation of BCP may be an effective method to reduce nitrogen loss from agricultural soils, prevent nitrate pollution of groundwater and augment the soil microbial biomass.
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Affiliation(s)
- M. A. Redmile-Gordon
- Rothamsted Research, Harpenden, Herts AL5 2JQ UK
- Sustainable Soils and Grassland Systems, Rothamsted Research, Harpenden, Herts AL5 2JQ UK
| | - E. Armenise
- Rothamsted Research, Harpenden, Herts AL5 2JQ UK
| | - P. R. Hirsch
- Rothamsted Research, Harpenden, Herts AL5 2JQ UK
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