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You Z, Yu M, Fu R, Nie X, Chen J. Synthesis and Properties of a Novel Levulinic Acid-Based Environmental Auxiliary Plasticizer for Poly(vinyl chloride). Polymers (Basel) 2024; 16:361. [PMID: 38337249 DOI: 10.3390/polym16030361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 12/26/2023] [Accepted: 12/29/2023] [Indexed: 02/12/2024] Open
Abstract
Herein, a bio-based plasticizer ketalized tung oil butyl levulinate (KTBL) was developed using methyl eleostearate, a derivative of tung oil, and butyl levulinate. KTBL can be used as an auxiliary plasticizer to partially replace traditional plasticizer. The plasticizer has a ketone structure, an ester base, and a long linear chain. It was mixed with dioctyl phthalate (DOP), and the effect of the plasticizer KTBL as an auxiliary plasticizer on the plasticization of poly(vinyl chloride) (PVC) was studied. Their compatibility and plasticizing effect were evaluated using dynamic-mechanical thermal analysis (DMA), mechanical property analysis, and thermogravimetric analysis (TGA). The results demonstrate that when the KTBL to DOP ratio is 1:1, the blended sample with KTBL exhibits superior mechanical performance compared to pure DOP, resulting in an increased elongation at break from 377.47% to 410.92%. Moreover, with the increase in KTBL content, the durability is also significantly improved. These findings suggest that KTBL can serve as an effective auxiliary plasticizer for PVC, thereby reducing the reliance on DOP.
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Affiliation(s)
- Zeyu You
- Key Laboratory of Biomass Energy and Material, Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing 210042, China
- College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
| | - Min Yu
- College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
| | - Renli Fu
- College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
| | - Xiaoan Nie
- Key Laboratory of Biomass Energy and Material, Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing 210042, China
| | - Jie Chen
- Key Laboratory of Biomass Energy and Material, Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing 210042, China
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2
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Hu Y, Sang R, Vroemans R, Mollaert G, Razzaq R, Neumann H, Junge H, Franke R, Jackstell R, Maes BUW, Beller M. Efficient Synthesis of Novel Plasticizers by Direct Palladium-Catalyzed Di- or Multi-carbonylations. Angew Chem Int Ed Engl 2023; 62:e202214706. [PMID: 36468459 PMCID: PMC10107635 DOI: 10.1002/anie.202214706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 12/02/2022] [Accepted: 12/02/2022] [Indexed: 12/09/2022]
Abstract
Diesters are of fundamental importance in the chemical industry and are used for many applications, e.g. as plasticizers, surfactants, emulsifiers, and lubricants. Herein, we present a straightforward and efficient method for the selective synthesis of diesters via palladium-catalyzed direct carbonylation of di- or polyols with readily available alkenes. Key-to-success is the use of a specific palladium catalyst with the "built-in-base" ligand L16 providing esterification of all alcohols and a high n/iso ratio. The synthesized diesters were evaluated as potential plasticizers in PVC films by measuring the glass transition temperature (Tg ) via differential scanning calorimetry (DSC).
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Affiliation(s)
- Yuya Hu
- Leibniz-Institut für Katalyse e.V., Albert-Einstein-Straße 29a, 18059, Rostock, Germany.,Organic Synthesis Division, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium
| | - Rui Sang
- Leibniz-Institut für Katalyse e.V., Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Robby Vroemans
- Organic Synthesis Division, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium
| | - Guillaume Mollaert
- Leibniz-Institut für Katalyse e.V., Albert-Einstein-Straße 29a, 18059, Rostock, Germany.,Organic Synthesis Division, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium
| | - Rauf Razzaq
- Leibniz-Institut für Katalyse e.V., Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Helfried Neumann
- Leibniz-Institut für Katalyse e.V., Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Henrik Junge
- Leibniz-Institut für Katalyse e.V., Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Robert Franke
- Evonik Performance Materials GmbH, Paul-Baumann-Straße 1, 45772, Marl, Germany.,Lehrstuhl für Theoretische Chemie, Ruhr-Universität Bochum, 44780, Bochum, Germany
| | - Ralf Jackstell
- Leibniz-Institut für Katalyse e.V., Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Bert U W Maes
- Organic Synthesis Division, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium
| | - Matthias Beller
- Leibniz-Institut für Katalyse e.V., Albert-Einstein-Straße 29a, 18059, Rostock, Germany
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3
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Nosal‐Kovalenko H, Krasuska A, Warzała M, Robaszkiewicz A, Ledniowska K, Stańczyk D, Hordyjewicz‐Baran Z, Bartoszewicz M, Semeniuk I, Zarębska M. Synthesis and characterization of new bio‐based nonmigrating poly(vinyl chloride) plasticizers. J Appl Polym Sci 2023. [DOI: 10.1002/app.53541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Hanna Nosal‐Kovalenko
- Łukasiewicz Research Network Institute of Heavy Organic Synthesis "Blachownia" Kędzierzyn‐Koźle Poland
| | - Agata Krasuska
- Łukasiewicz Research Network Institute of Heavy Organic Synthesis "Blachownia" Kędzierzyn‐Koźle Poland
| | - Marek Warzała
- Łukasiewicz Research Network Institute of Heavy Organic Synthesis "Blachownia" Kędzierzyn‐Koźle Poland
| | - Andrzej Robaszkiewicz
- Łukasiewicz Research Network Institute of Heavy Organic Synthesis "Blachownia" Kędzierzyn‐Koźle Poland
| | - Kerstin Ledniowska
- Łukasiewicz Research Network Institute of Heavy Organic Synthesis "Blachownia" Kędzierzyn‐Koźle Poland
| | - Dorota Stańczyk
- Łukasiewicz Research Network Institute of Heavy Organic Synthesis "Blachownia" Kędzierzyn‐Koźle Poland
| | - Zofia Hordyjewicz‐Baran
- Łukasiewicz Research Network Institute of Heavy Organic Synthesis "Blachownia" Kędzierzyn‐Koźle Poland
| | - Maria Bartoszewicz
- Łukasiewicz Research Network Institute of Heavy Organic Synthesis "Blachownia" Kędzierzyn‐Koźle Poland
| | - Izabela Semeniuk
- Łukasiewicz Research Network Institute of Heavy Organic Synthesis "Blachownia" Kędzierzyn‐Koźle Poland
| | - Magdalena Zarębska
- Łukasiewicz Research Network Institute of Heavy Organic Synthesis "Blachownia" Kędzierzyn‐Koźle Poland
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4
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Screening of Potential Plasticizer Alternatives for Their Toxic Effects on Male Germline Stem Cells. Biomedicines 2022; 10:biomedicines10123217. [PMID: 36551973 PMCID: PMC9776359 DOI: 10.3390/biomedicines10123217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 12/07/2022] [Accepted: 12/08/2022] [Indexed: 12/14/2022] Open
Abstract
Plasticizers give flexibility to a wide range of consumer and medical plastic products. Among them, phthalate esters are recognized as endocrine disruptors that target male reproductive functions. With this notion, past studies designed and produced alternative plasticizers that could replace phthalates with limited toxicity to the environment and to male reproductive functions. Here, we focused on one reproductive cell type that was not investigated in past studies-spermatogonial stem cells (SSCs)-and examined in vitro the effects on 22 compounds (seven plasticizers currently in use and 15 newly synthesized potential alternative plasticizers) for their effects on SSCs. Our in vitro compound screening analyses showed that a majority of the compounds examined had a limited level of toxicity to SSCs. Yet, some commercial plasticizers and their derivatives, such as DEHP (di-(2-ethylhexyl) phthalate) and MEHP (mono-(2-ethylhexyl) phthalate), were detrimental at 10-5 to 10-4 M. Among new compounds, some of maleate- and fumarate-derivatives showed toxic effects. In contrast, no detrimental effects were detected with two new compounds, BDDB (1,4 butanediol dibenzoate) and DOS (dioctyl succinate). Furthermore, SSCs that were exposed to BDDB and DOS in vitro successfully established spermatogenic colonies in testes of recipient mice after transplantation. These results demonstrate that SSC culture acts as an effective platform for toxicological tests on SSC function and provide novel information that two new compounds, BDDB and DOS, are alternative plasticizers that do not have significant negative impacts on SSC integrity.
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5
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Halloran MW, Nicell JA, Leask RL, Marić M. Bio‐based glycerol plasticizers for flexible poly(vinyl chloride) blends. J Appl Polym Sci 2022. [DOI: 10.1002/app.52778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
| | - Jim A. Nicell
- Department of Civil Engineering McGill University Montréal Quebec Canada
| | - Richard L. Leask
- Department of Chemical Engineering McGill University Montréal Quebec Canada
| | - Milan Marić
- Department of Chemical Engineering McGill University Montréal Quebec Canada
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Vikhareva IN, Aminova GK, Mazitova AK. Development of a Highly Efficient Environmentally Friendly Plasticizer. Polymers (Basel) 2022; 14:polym14091888. [PMID: 35567061 PMCID: PMC9100690 DOI: 10.3390/polym14091888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Revised: 04/27/2022] [Accepted: 05/02/2022] [Indexed: 12/10/2022] Open
Abstract
The purpose of this work is the synthesis of adipic acid ester and the study of the possibility of its use as a PVC plasticizer. The resulting butyl phenoxyethyl adipate was characterized by Fourier-transform infrared spectrometry, thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The compatibility, effectiveness and plasticizing effect of butyl phenoxyethyl adipate in comparison with dioctylphthalate (DOP) were determined. The new environmentally friendly plasticizer has good compatibility with PVC and high thermal stability. The effectiveness of the plasticizing action of adipate based on the glass-transition temperature was 132.2 °C in relation to pure PVC and 7.7 °C in comparison to compounds based on DOP. An increase in the fluidity of the melt of polyvinyl chloride (PVC) compounds in the temperature range of 160–205 °C by 19–50% confirms a decrease in the energy intensity of the processes of manufacturing and the processing of polymer materials containing a new additive.
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7
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Ledniowska K, Nosal-Kovalenko H, Janik W, Krasuska A, Stańczyk D, Sabura E, Bartoszewicz M, Rybak A. Effective, Environmentally Friendly PVC Plasticizers Based on Succinic Acid. Polymers (Basel) 2022; 14:polym14071295. [PMID: 35406169 PMCID: PMC9002721 DOI: 10.3390/polym14071295] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 03/18/2022] [Accepted: 03/21/2022] [Indexed: 11/16/2022] Open
Abstract
The plasticizers used in this study were synthesized from renewable raw materials using succinic acid, oleic acid, and propylene glycol. Four environmentally friendly plasticizer samples were obtained; their chemical structures and compositions were confirmed by gas chromatography (GC) and infrared spectroscopy (FT–IR) analyses, and their physicochemical properties and thermal stability (TGA analysis) were investigated. The obtained ester mixtures were used as poly(vinyl chloride) (PVC) plasticizers and their plasticization efficiency was determined in comparison to traditional, commercially available phthalate plasticizers, such as DEHP (di(2-ethylhexyl phthalate) and DINP (diisononyl phthalate). Mechanical properties and migration resistance were determined for soft PVC with the use of three concentrations of plasticizers (40 PHR, 50 PHR, and 60 PHR). It was observed that the obtained plasticizers exhibited the same plasticization efficiency and were characterized with good mechanical and physical properties in comparison to commercial plasticizers. The tensile strength was approx. 19 MPa, while the elongation at break was approx. 250% for all tested plasticizers at a concentration of 50 PHR. Furthermore, plasticizer migration studies showed that the synthesized plasticizers had excellent resistance to plasticizer leaching. The best migration test result obtained was 70% lower than that for DEHP or DINP. The ester mixture that was found to be the most favorable plasticizer was characterized by good thermal and thermo-oxidative stability (5% weight loss temperature: 227.8 °C in air and 261.1 °C in nitrogen). The results of the research clearly indicate that the synthesized esters can provide a green alternative to toxic phthalate plasticizers.
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Affiliation(s)
- Kerstin Ledniowska
- Łukasiewicz Research Network—Institute of Heavy Organic Synthesis “Blachownia”, Energetyków 9, 47-225 Kędzierzyn-Koźle, Poland; (H.N.-K.); (W.J.); (A.K.); (D.S.); (E.S.); (M.B.)
- Department of Physical Chemistry and Technology of Polymers, PhD School, Silesian University of Technology, Akademicka 2a, 44-100 Gliwice, Poland
- Correspondence:
| | - Hanna Nosal-Kovalenko
- Łukasiewicz Research Network—Institute of Heavy Organic Synthesis “Blachownia”, Energetyków 9, 47-225 Kędzierzyn-Koźle, Poland; (H.N.-K.); (W.J.); (A.K.); (D.S.); (E.S.); (M.B.)
| | - Weronika Janik
- Łukasiewicz Research Network—Institute of Heavy Organic Synthesis “Blachownia”, Energetyków 9, 47-225 Kędzierzyn-Koźle, Poland; (H.N.-K.); (W.J.); (A.K.); (D.S.); (E.S.); (M.B.)
- Department of Physical Chemistry and Technology of Polymers, PhD School, Silesian University of Technology, Akademicka 2a, 44-100 Gliwice, Poland
| | - Agata Krasuska
- Łukasiewicz Research Network—Institute of Heavy Organic Synthesis “Blachownia”, Energetyków 9, 47-225 Kędzierzyn-Koźle, Poland; (H.N.-K.); (W.J.); (A.K.); (D.S.); (E.S.); (M.B.)
| | - Dorota Stańczyk
- Łukasiewicz Research Network—Institute of Heavy Organic Synthesis “Blachownia”, Energetyków 9, 47-225 Kędzierzyn-Koźle, Poland; (H.N.-K.); (W.J.); (A.K.); (D.S.); (E.S.); (M.B.)
| | - Ewa Sabura
- Łukasiewicz Research Network—Institute of Heavy Organic Synthesis “Blachownia”, Energetyków 9, 47-225 Kędzierzyn-Koźle, Poland; (H.N.-K.); (W.J.); (A.K.); (D.S.); (E.S.); (M.B.)
| | - Maria Bartoszewicz
- Łukasiewicz Research Network—Institute of Heavy Organic Synthesis “Blachownia”, Energetyków 9, 47-225 Kędzierzyn-Koźle, Poland; (H.N.-K.); (W.J.); (A.K.); (D.S.); (E.S.); (M.B.)
| | - Aleksandra Rybak
- Department of Physical Chemistry and Technology of Polymers, Faculty of Chemistry, Silesian University of Technology, Strzody 7, 44-100 Gliwice, Poland;
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8
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Effects of molecular design parameters on plasticizer performance in poly(vinyl chloride): A comprehensive molecular simulation study. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2021.117334] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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9
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Enangue Njembele AN, Tremblay JJ. Mechanisms of MEHP Inhibitory Action and Analysis of Potential Replacement Plasticizers on Leydig Cell Steroidogenesis. Int J Mol Sci 2021; 22:ijms222111456. [PMID: 34768887 PMCID: PMC8584274 DOI: 10.3390/ijms222111456] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 10/13/2021] [Accepted: 10/22/2021] [Indexed: 11/16/2022] Open
Abstract
Steroid production in Leydig cells is stimulated mainly by the pituitary luteinizing hormone, which leads to increased expression of genes involved in steroidogenesis, including the gene encoding the steroidogenic acute regulatory (STAR) protein. Mono(2-ethylhexyl)phthalate (MEHP), the active metabolite of the widely used plasticizer DEHP, is known to disrupt Leydig steroidogenesis but its mechanisms of action remain poorly understood. We found that MEHP caused a significant reduction in hormone-induced steroid hormone production in two Leydig cell lines, MA-10 and MLTC-1. Consistent with disrupted cholesterol transport, we found that MEHP represses cAMP-induced Star promoter activity. MEHP responsiveness was mapped to the proximal Star promoter, which contains multiple binding sites for several transcription factors. In addition to STAR, we found that MEHP also reduced the levels of ferredoxin reductase, a protein essential for electron transport during steroidogenesis. Finally, we tested new plasticizers as alternatives to phthalates. Two plasticizers, dioctyl succinate and 1,6-hexanediol dibenzoate, had no significant effect on hormone-induced steroidogenesis. Our current findings reveal that MEHP represses steroidogenesis by affecting cholesterol transport and its conversion into pregnenolone. We also found that two novel molecules with desirable plasticizer properties have no impact on Leydig cell steroidogenesis and could be suitable phthalate replacements.
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Affiliation(s)
- Annick N. Enangue Njembele
- Reproduction, Mother and Child Health, Room T3-67, Centre de Recherche du CHU de Québec–Université Laval CHUL 2705 Laurier Blvd., Québec City, QC G1V 4G2, Canada;
| | - Jacques J. Tremblay
- Reproduction, Mother and Child Health, Room T3-67, Centre de Recherche du CHU de Québec–Université Laval CHUL 2705 Laurier Blvd., Québec City, QC G1V 4G2, Canada;
- Centre for Research in Reproduction, Development and Intergenerational Health, Department of Obstetrics, Gynecology, and Reproduction, Faculty of Medicine, Université Laval, Québec City, QC G1V 0A6, Canada
- Correspondence: ; Tel.: +1-418-525-4444 (ext. 46254)
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Alhanish A, Abu Ghalia M. Developments of biobased plasticizers for compostable polymers in the green packaging applications: A review. Biotechnol Prog 2021; 37:e3210. [PMID: 34499430 DOI: 10.1002/btpr.3210] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 09/03/2021] [Accepted: 09/08/2021] [Indexed: 12/15/2022]
Abstract
The demand for biobased materials for various end-uses in the bioplastic industry is substantially growing due to increasing awareness of health and environmental concerns, along with the toxicity of synthetic plasticizers such as phthalates. This fact has stimulated new regulations requiring the replacement of synthetic conventional plasticizers, particularly for packaging applications. Biobased plasticizers have recently been considered as essential additives, which may be used during the processing of compostable polymers to enormously boost biobased packaging applications. The development and utilization of biobased plasticizers derived from epoxidized soybean oil, castor oil, cardanol, citrate, and isosorbide have been broadly investigated. The synthesis of biobased plasticizers derived from renewable feedstocks and their impact on packaging material performance have been emphasized. Moreover, the effect of biobased plasticizer concentration, interaction, and compatibility on the polymer properties has been examined. Recent developments have resulted in the replacement of synthetic plasticizers by biobased counterparts. Particularly, this has been the case for some biodegradable thermoplastics-based packaging applications.
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Affiliation(s)
- Atika Alhanish
- Department of Chemical Engineering, Faculty of Petroleum and Natural Gas Engineering, University of Zawia, Zawia, Libya
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11
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Jamarani R, Halloran MW, Panchal K, Garcia‐Valdez O, Mafi R, Nicell JA, Leask RL, Marić M. Additives to prevent the formation of surface defects during poly(vinyl chloride) calendering. POLYM ENG SCI 2021. [DOI: 10.1002/pen.25667] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Roya Jamarani
- Department of Chemical Engineering McGill University Montréal Quebec Canada
| | | | | | - Omar Garcia‐Valdez
- Department of Chemical Engineering McGill University Montréal Quebec Canada
- GreenCentre Canada Kingston Ontario Canada
| | - Roozbeh Mafi
- Canadian General‐Tower Ltd Cambridge Ontario Canada
- Department of Chemical Engineering McMaster University Hamilton Ontario Canada
| | - James A. Nicell
- Department of Civil Engineering & Applied Mechanics McGill University Montreal Quebec Canada
| | - Richard L. Leask
- Department of Chemical Engineering McGill University Montréal Quebec Canada
| | - Milan Marić
- Department of Chemical Engineering McGill University Montréal Quebec Canada
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12
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Llanes LC, Clasen SH, Pires AT, Gross IP. Mechanical and thermal properties of poly(lactic acid) plasticized with dibutyl maleate and fumarate isomers: Promising alternatives as biodegradable plasticizers. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2020.110112] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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13
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Farajzadeh MA, Pezhhanfar S, Zarei M, Mohebbi A. Simultaneous elimination of diethyl phthalate, butylated hydroxy toluene and butylated hydroxy anisole from aqueous medium by an adsorption process on pretreated waste material; investigation of isotherms and neural network modeling. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2020. [DOI: 10.1007/s13738-020-01863-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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14
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Hayes GC, Becer CR. Levulinic acid: a sustainable platform chemical for novel polymer architectures. Polym Chem 2020. [DOI: 10.1039/d0py00705f] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Levulinic acid is a multipurpose platform chemical that is currently used in a wide variety of applications.
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15
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Wang Z, Zhu X, Su Y, Xu W, Liu H, Liu Z, Chen W, Wang J. Dimethyl phthalate damaged the cell membrane of Escherichia coli K12. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 180:208-214. [PMID: 31096126 DOI: 10.1016/j.ecoenv.2019.05.009] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 04/25/2019] [Accepted: 05/02/2019] [Indexed: 05/22/2023]
Abstract
Dimethyl phthalate (DMP), a phthalate ester (PAE), is a ubiquitous and organic pollutant. In this study, the toxicity of DMP to Escherichia coli K12 and its underlying mechanism were investigated. The results showed that DMP inhibited the growth of E. coli K12 and induced cell inactivation and/or death. DMP caused serious damage to the cell membrane of E. coli K12, and the damage increased with higher DMP concentrations. DMP exposure disrupted cell membranes, as evidenced by dose-dependent variations of cell structures, surface properties, and membrane compositions. Increases in the malondialdehyde (MDA) content indicated an increase in oxidative stress induced by DMP in E. coli K12. The activity of succinic dehydrogenase (SDH) was changed by DMP, which could affect energy metabolism in the membrane of E. coli K12. The expression levels of OmpA and OmpX were increased, and the expression levels of OmpF and OmpW were decreased, in E. coli K12 exposed to DMP. The toxicities of DMP to E. coli K12 could be ascribed to membrane disruption and oxidative stress-induced cell inactivation and/or death. The outcomes will shed new light on the assessment of the ecological effects of DMP.
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Affiliation(s)
- Zhigang Wang
- School of Life Science and Agriculture and Forestry, Qiqihar University, Qiqihar, Heilongjiang, 161006, China
| | - Xiaohui Zhu
- School of Life Science and Agriculture and Forestry, Qiqihar University, Qiqihar, Heilongjiang, 161006, China
| | - Yunpeng Su
- School of Life Science and Agriculture and Forestry, Qiqihar University, Qiqihar, Heilongjiang, 161006, China
| | - Weihui Xu
- School of Life Science and Agriculture and Forestry, Qiqihar University, Qiqihar, Heilongjiang, 161006, China.
| | - Hong Liu
- School of Life Science and Agriculture and Forestry, Qiqihar University, Qiqihar, Heilongjiang, 161006, China
| | - Zeping Liu
- School of Life Science and Agriculture and Forestry, Qiqihar University, Qiqihar, Heilongjiang, 161006, China
| | - Wenjing Chen
- School of Life Science and Agriculture and Forestry, Qiqihar University, Qiqihar, Heilongjiang, 161006, China
| | - Junhe Wang
- Qiqihar Branch of Heilongjiang Academy of Agricultural Sciences, Qiqihar, Heilongjiang, 161006, China
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16
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Howell BA, Lazar ST. Biobased Plasticizers from Glycerol/Adipic Acid Hyperbranched Poly(ester)s. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b03869] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Bob A. Howell
- Center for Applications in Polymer Science, Department of Chemistry and Biochemistry, Central Michigan University, Mt. Pleasant, Michigan 48859-0001, United States
| | - Simone T. Lazar
- Center for Applications in Polymer Science, Department of Chemistry and Biochemistry, Central Michigan University, Mt. Pleasant, Michigan 48859-0001, United States
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17
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Albert O, Nardelli TC, Hales BF, Robaire B. Identifying Greener and Safer Plasticizers: A 4-Step Approach. Toxicol Sci 2019; 161:266-275. [PMID: 29036695 DOI: 10.1093/toxsci/kfx156] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The health and economic burden of endocrine disrupting chemicals, such as the plasticizer di(2-ethylhexyl) phthalate (DEHP), is prompting industry to develop alternatives. However, the absence of requirements for manufacturers to ensure the safety of these alternatives has led to the generation of replacements that may have similar or worse effects than the original chemicals. Consequently, there is increasing recognition by scientists, regulators and industry that proactive approaches are needed to develop safe chemical substitutes. We propose a 4-step approach for the design, characterization and toxicological testing of responsible alternative chemicals that we illustrate with our ongoing studies on DEHP replacements. Our approach is comprised of: (1) the design and characterization of alternative chemicals based on innovative chemical structures and environmental considerations; (2) large-scale in vitro cell-based high throughput and selective ex vivo studies to preselect the most innocuous alternatives; (3) an acute toxicity in vivo study to rule out overt toxicity of the selected candidates; and (4) an in utero and lactational exposure study comparing the effects of selected candidates to those currently in use, emphasizing commonly described phenotypes after exposure to the latter. Using this 4-step approach, we have identified 2 alternative chemicals displaying good plasticizing properties, better biodegradability, and less leaching than DEHP without any apparent toxicity in vivo. This process has thus far proven useful in the proactive identification of responsible chemical replacements for DEHP.
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Affiliation(s)
- Océane Albert
- Department of Pharmacology and Therapeutics, McGill University, Montreal, Quebec H3G 1Y6, Canada
| | - Thomas C Nardelli
- Department of Pharmacology and Therapeutics, McGill University, Montreal, Quebec H3G 1Y6, Canada
| | - Barbara F Hales
- Department of Pharmacology and Therapeutics, McGill University, Montreal, Quebec H3G 1Y6, Canada
| | - Bernard Robaire
- Department of Pharmacology and Therapeutics, McGill University, Montreal, Quebec H3G 1Y6, Canada.,Department of Obstetrics and Gynecology, McGill University, Montreal, Quebec H4A 3J1, Canada
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Ji S, Gao C, Wang H, Liu Y, Zhang D, Zhang S, Lu X, Wu Y, Hu Z. Application of a bio-based polyester plasticizer modified by hydrosilicon-hydrogenation reaction in soft PVC films. POLYM ADVAN TECHNOL 2019. [DOI: 10.1002/pat.4546] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Shufang Ji
- College of Chemical Engineering; Qingdao University of Science & Technology; 266042 Qingdao China
| | - Chuanhui Gao
- College of Chemical Engineering; Qingdao University of Science & Technology; 266042 Qingdao China
| | - Huizi Wang
- College of Chemical Engineering; Qingdao University of Science & Technology; 266042 Qingdao China
| | - Yuetao Liu
- College of Chemical Engineering; Qingdao University of Science & Technology; 266042 Qingdao China
| | - Di Zhang
- College of Chemical Engineering; Qingdao University of Science & Technology; 266042 Qingdao China
| | - Shanfa Zhang
- Qingdao Haiwan Chemical Co. LTD; 266409 Qingdao China
| | - Xiaotong Lu
- College of Chemical; Qingdao University of Science & Technology; 266042 Qingdao China
| | - Yumin Wu
- College of Chemical Engineering; Qingdao University of Science & Technology; 266042 Qingdao China
| | - Zunfu Hu
- College of Materials Science and Engineering; Linyi University; 276000 Linyi China
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19
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Howell BA, Lazar ST. Biobased Plasticizers from Carbohydrate-Derived 2,5-Bis(hydroxymethyl)furan. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b05442] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Bob A. Howell
- Center for Applications in Polymer Science, Department of Chemistry and Biochemistry, Central Michigan University, Mt. Pleasant, Michigan 48859-0001, United States
| | - Simone T. Lazar
- Center for Applications in Polymer Science, Department of Chemistry and Biochemistry, Central Michigan University, Mt. Pleasant, Michigan 48859-0001, United States
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20
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Howell BA, Sun W. Biobased Plasticizers from Tartaric Acid, an Abundantly Available, Renewable Material. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b03486] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bob A. Howell
- Science of Advanced Materials Center for Applications in Polymer Science Department of Chemistry and Biochemistry, Central Michigan University Mt. Pleasant, Michigan 48859-0001, United States
| | - Wenxiao Sun
- Science of Advanced Materials Center for Applications in Polymer Science Department of Chemistry and Biochemistry, Central Michigan University Mt. Pleasant, Michigan 48859-0001, United States
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Jamarani R, Erythropel HC, Nicell JA, Leask RL, Marić M. How Green is Your Plasticizer? Polymers (Basel) 2018; 10:E834. [PMID: 30960759 PMCID: PMC6403783 DOI: 10.3390/polym10080834] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Revised: 07/24/2018] [Accepted: 07/25/2018] [Indexed: 01/16/2023] Open
Abstract
Plasticizers are additives that are used to impart flexibility to polymer blends and improve their processability. Plasticizers are typically not covalently bound to the polymers, allowing them to leach out over time, which results in human exposure and environmental contamination. Phthalates, in particular, have been the subject of increasing concern due to their established ubiquity in the environment and their suspected negative health effects, including endocrine disrupting and anti-androgenic effects. As there is mounting pressure to find safe replacement compounds, this review addresses the design and experimental elements that should be considered in order for a new or existing plasticizer to be considered green. Specifically, a multi-disciplinary and holistic approach should be taken which includes toxicity testing (both in vitro and in vivo), biodegradation testing (with attention to metabolites), as well as leaching studies. Special consideration should also be given to the design stages of producing a new molecule and the synthetic and scale-up processes should also be optimized. Only by taking a multi-faceted approach can a plasticizer be considered truly green.
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Affiliation(s)
- Roya Jamarani
- Department of Chemical Engineering, McGill University, 3610 University St, Montréal, QC H3A 0C5, Canada.
| | - Hanno C Erythropel
- Department of Chemical Engineering, McGill University, 3610 University St, Montréal, QC H3A 0C5, Canada.
- Center for Green Chemistry and Green Engineering, Yale University, 370 Prospect St, New Haven, CT 06511, USA.
| | - James A Nicell
- Department of Civil Engineering & Applied Mechanics, McGill University, 817 Sherbrooke Street West, Montreal, QC H3A 0C3, Canada.
| | - Richard L Leask
- Department of Chemical Engineering, McGill University, 3610 University St, Montréal, QC H3A 0C5, Canada.
| | - Milan Marić
- Department of Chemical Engineering, McGill University, 3610 University St, Montréal, QC H3A 0C5, Canada.
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22
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Rheology of Green Plasticizer/Poly(vinyl chloride) Blends via Time–Temperature Superposition. Processes (Basel) 2017. [DOI: 10.3390/pr5030043] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Abstract
Di(2-ethylhexyl) phthalate (DEHP) and other phthalates are ubiquitous environmental contaminants with endocrine disrupting properties. Two novel plasticizers, 1,4 butanediol dibenzoate (BDB) and dioctyl succinate (DOS), have been proposed as potential replacements. Both have desirable properties as plasticizers and minimal in vitro biological effects. Herein, we present an in utero and lactational exposure study comparing DEHP with BDB, DOS, and 1,2-cyclohexane dicarboxylic acid diisononyl ester (DINCH), a commercial alternative. Timed-pregnant Sprague-Dawley rats were gavaged with vehicle or one of these chemicals at 30 or 300 mg/kg/day from gestational day 8 until postnatal day (PND) 21. The offspring were examined for effects on developmental and endocrine markers until PND 46. DEHP treatment (300 mg/kg) decreased heart weights in dams and induced a significant decrease in anogenital index and an increase in hemorrhagic testes and multinucleated gonocytes in PND 3 male pups. An increase in the incidence of hemorrhagic testes was also observed on PND 8 after exposure to DINCH (30 and 300 mg/kg). The only other effects observed were decreases in serum alanine transaminase and magnesium in BDB 30 exposed dams. These data suggest that both BDB and DOS are viable alternative plasticizers.
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Boisvert A, Jones S, Issop L, Erythropel HC, Papadopoulos V, Culty M. In vitro functional screening as a means to identify new plasticizers devoid of reproductive toxicity. ENVIRONMENTAL RESEARCH 2016; 150:496-512. [PMID: 27423704 DOI: 10.1016/j.envres.2016.06.033] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2016] [Revised: 06/19/2016] [Accepted: 06/20/2016] [Indexed: 06/06/2023]
Abstract
Plasticizers are indispensable additives providing flexibility and malleability to plastics. Among them, several phthalates, including di (2-ethylhexyl) phthalate (DEHP), have emerged as endocrine disruptors, leading to their restriction in consumer products and creating a need for new, safer plasticizers. The goal of this project was to use in vitro functional screening tools to select novel non-toxic plasticizers suitable for further in vivo evaluation. A panel of novel compounds with satisfactory plasticizer properties and biodegradability were tested, along with several commercial plasticizers, such as diisononyl-cyclohexane-1,2-dicarboxylate (DINCH®). MEHP, the monoester metabolite of DEHP was also included as reference compound. Because phthalates target mainly testicular function, including androgen production and spermatogenesis, we used the mouse MA-10 Leydig and C18-4 spermatogonial cell lines as surrogates to examine cell survival, proliferation, steroidogenesis and mitochondrial integrity. The most promising compounds were further assessed on organ cultures of rat fetal and neonatal testes, corresponding to sensitive developmental windows. Dose-response studies revealed the toxicity of most maleates and fumarates, while identifying several dibenzoate and succinate plasticizers as innocuous on Leydig and germ cells. Interestingly, DINCH®, a plasticizer marketed as a safe alternative to phthalates, exerted a biphasic effect on steroid production in MA-10 and fetal Leydig cells. MEHP was the only plasticizer inducing the formation of multinucleated germ cells (MNG) in organ culture. Overall, organ cultures corroborated the cell line data, identifying one dibenzoate and one succinate as the most promising candidates. The adoption of such collaborative approaches for developing new chemicals should help prevent the development of compounds potentially harmful to human health.
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Affiliation(s)
- Annie Boisvert
- The Research Institute of the McGill University Health Centre, McGill University, Montreal, Quebec, Canada H4A 3J1; Department of Medicine, McGill University, Montreal, Quebec, Canada H4A 3J1
| | - Steven Jones
- The Research Institute of the McGill University Health Centre, McGill University, Montreal, Quebec, Canada H4A 3J1; Department of Medicine, McGill University, Montreal, Quebec, Canada H4A 3J1
| | - Leeyah Issop
- The Research Institute of the McGill University Health Centre, McGill University, Montreal, Quebec, Canada H4A 3J1; Department of Medicine, McGill University, Montreal, Quebec, Canada H4A 3J1
| | - Hanno C Erythropel
- Department of Chemical Engineering, McGill University, Montreal, Quebec, Canada H4A 3J1
| | - Vassilios Papadopoulos
- The Research Institute of the McGill University Health Centre, McGill University, Montreal, Quebec, Canada H4A 3J1; Department of Medicine, McGill University, Montreal, Quebec, Canada H4A 3J1; Department of Pharmacology & Therapeutics, McGill University, Montreal, Quebec, Canada H4A 3J1
| | - Martine Culty
- The Research Institute of the McGill University Health Centre, McGill University, Montreal, Quebec, Canada H4A 3J1; Department of Medicine, McGill University, Montreal, Quebec, Canada H4A 3J1; Department of Pharmacology & Therapeutics, McGill University, Montreal, Quebec, Canada H4A 3J1.
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25
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Gui X, Chen S, Yun Z. Continuous production of biodiesel from cottonseed oil and methanol using a column reactor packed with calcined sodium silicate base catalyst. Chin J Chem Eng 2016. [DOI: 10.1016/j.cjche.2015.11.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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26
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Designing green plasticizers: Influence of molecule geometry and alkyl chain length on the plasticizing effectiveness of diester plasticizers in PVC blends. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.02.031] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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27
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Wen ZD, Wu WM, Ren NQ, Gao DW. Synergistic effect using vermiculite as media with a bacterial biofilm of Arthrobacter sp. for biodegradation of di-(2-ethylhexyl) phthalate. JOURNAL OF HAZARDOUS MATERIALS 2016; 304:118-125. [PMID: 26547620 DOI: 10.1016/j.jhazmat.2015.10.060] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Revised: 10/04/2015] [Accepted: 10/25/2015] [Indexed: 06/05/2023]
Abstract
Vermiculite is one of matrix material used for constructed wetland (CW) for the treatment of municipal wastewater. Arthrobacter sp. strain C21 (CGMCC No. 7671), isolated from a constructed wetland receiving municipal wastewater, forms biofilm on the surface of vermiculite. Di-(2-ethylhexyl) phthalate (DEHP), a typical phthalate pollutant in environment, can be degraded by the biofilm of strain C21 formed on vermiculite. Results of laboratory studies indicated that DEHP was removed from aqueous phase via biodegradation, adsorption by vermiculite, and adsorption by biofilm biomass. Synergistic effect of these three reactions enhanced the overall DEHP removal efficiency. During a batch incubation test with vermiculite and the cell suspension, bacterial adhesion to the media surface occurred within 5h and the phthalate esters (PEs) removal was due to both biodegradation and vermiculite adsorption. As the biofilm developed on surface of vermiculite (5-36 h), biodegradation became the predominance for PEs removal. As mature biofilm was formed (36-54 h), the adsorption of PEs by biofilm biomass became a main driving force for the removal of PEs from aqueous phase. The content of extracellular polymers (EPS) of the biofilm and DEHP removal performance showed a significant positive correlation (rp>0.86).
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Affiliation(s)
- Zhi-Dan Wen
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China; Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China
| | - Wei-Min Wu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China; Department of Civil and Environmental Engineering, William and Cloy Codiga Resource Recovery Research Center, Centre for Sustainable Development & Global Competitiveness, Stanford University, Stanford, CA 94305-4020, USA
| | - Nan-Qi Ren
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Da-Wen Gao
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
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28
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Gui X, Ding Y, Yun Z. Preparation of cottonseed-based epoxy fatty acid methyl esters by an integrated approach. CAN J CHEM ENG 2016. [DOI: 10.1002/cjce.22409] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Xia Gui
- College of Chemistry and Chemical Engineering; Nanjing University of Technology; Nanjing 210009 P. R. China
| | - Ying Ding
- College of Chemistry and Chemical Engineering; Nanjing University of Technology; Nanjing 210009 P. R. China
| | - Zhi Yun
- College of Chemistry and Chemical Engineering; Nanjing University of Technology; Nanjing 210009 P. R. China
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29
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Gao DW, Wen ZD. Phthalate esters in the environment: A critical review of their occurrence, biodegradation, and removal during wastewater treatment processes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 541:986-1001. [PMID: 26473701 DOI: 10.1016/j.scitotenv.2015.09.148] [Citation(s) in RCA: 466] [Impact Index Per Article: 58.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Revised: 09/28/2015] [Accepted: 09/28/2015] [Indexed: 05/05/2023]
Abstract
Phthalate esters are one of the most frequently detected persistent organic pollutants in the environment. A better understanding of their occurrence and degradation in the environment and during wastewater treatment processes will facilitate the development of strategies to reduce these pollutants and to bioremediate contaminated freshwater and soil. Phthalate esters occur at measurable levels in different environments worldwide. For example, the concentrations of dimethyl phthalate (DMP) in atmospheric particulate matter, fresh water and sediments, soil, and landfills are N.D.-10.4 ng/m(3), N.D.-31.7 μg/L, N.D.-316 μg/kg dry weight, and N.D.-200 μg/kg dry weight, N.D.-43.27 μg/L, respectively. Bis(2-ethylhexyl) phthalate (DEHP) and di-n-butyl phthalate (DBP) are primary phthalate ester pollutants. Urbanization has increased the discharge of phthalate esters to atmospheric and aquatic environments, and the use of agricultural plastics has exacerbated soil contamination by phthalate esters in rural areas. Aerobic biodegradation is the primary manner of phthalate ester mineralization in the environment, and this process has been widely studied. Phthalate esters can be removed during wastewater treatment processes. The combination of different wastewater treatment technologies showed greater efficiency in the removal of phthalate esters than individual treatment steps, such as the combination of anaerobic wastewater treatment with a membrane bioreactor would increase the efficiency of phthalate ester removal from 65%-71% to 95%-97%. This review provides a useful framework to identify future research objectives to achieve the mineralization and elimination of phthalate esters in the environment.
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Affiliation(s)
- Da-Wen Gao
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
| | - Zhi-Dan Wen
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
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30
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Toxicogenomic Screening of Replacements for Di(2-Ethylhexyl) Phthalate (DEHP) Using the Immortalized TM4 Sertoli Cell Line. PLoS One 2015; 10:e0138421. [PMID: 26445464 PMCID: PMC4596883 DOI: 10.1371/journal.pone.0138421] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Accepted: 08/29/2015] [Indexed: 12/04/2022] Open
Abstract
Phthalate plasticizers such as di(2-ethylhexyl) phthalate (DEHP) are being phased out of many consumer products because of their endocrine disrupting properties and their ubiquitous presence in the environment. The concerns raised from the use of phthalates have prompted consumers, government, and industry to find alternative plasticizers that are safe, biodegradable, and have the versatility for multiple commercial applications. We examined the toxicogenomic profile of mono(2-ethylhexyl) phthalate (MEHP, the active metabolite of DEHP), the commercial plasticizer diisononyl cyclohexane-1,2-dicarboxylate (DINCH), and three recently proposed plasticizers: 1,4-butanediol dibenzoate (BDB), dioctyl succinate (DOS), and dioctyl maleate (DOM), using the immortalized TM4 Sertoli cell line. Results of gene expression studies revealed that DOS and BDB clustered with control samples while MEHP, DINCH and DOM were distributed far away from the control-DOS-BDB cluster, as determined by principle component analysis. While no significant changes in gene expression were found after treatment with BDB and DOS, treatment with MEHP, DINCH and DOM resulted in many differentially expressed genes. MEHP upregulated genes downstream of PPAR and targeted pathways of cholesterol biosynthesis without modulating the expression of PPAR’s themselves. DOM upregulated genes involved in glutathione stress response, DNA repair, and cholesterol biosynthesis. Treatment with DINCH resulted in altered expression of a large number of genes involved in major signal transduction pathways including ERK/MAPK and Rho signalling. These data suggest DOS and BDB may be safer alternatives to DEHP/MEHP than DOM or the commercial alternative DINCH.
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Erythropel HC, Brown T, Maric M, Nicell JA, Cooper DG, Leask RL. Designing greener plasticizers: Effects of alkyl chain length and branching on the biodegradation of maleate based plasticizers. CHEMOSPHERE 2015; 134:106-112. [PMID: 25917507 DOI: 10.1016/j.chemosphere.2015.04.014] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Revised: 04/03/2015] [Accepted: 04/07/2015] [Indexed: 06/04/2023]
Abstract
The ubiquitous presence of the plasticizer di (2-ethylhexyl) phthalate (DEHP) in the environment is of concern due to negative biological effects associated with it and its metabolites. In particular, the metabolite mono (2-ethylhexyl) phthalate (MEHP) is a potential endocrine disruptor. Earlier work had identified the diester di (2-ethylhexyl) maleate (DEHM) as a potential greener candidate plasticizer to replace DEHP, yet its biodegradation rate was reported to be slow. In this study, we modified the side chains of maleate diesters to be linear (i.e., unbranched) alkyl chains that varied in length from ethyl to n-octyl. The plasticization efficiency of these compounds blended into PVC at 29 wt.% increased with the overall length of the molecule, but all compounds performed as well as or better than comparable samples with DEHP. Tests conducted with the equally long DEHM and dihexyl maleate (DHM) showed that branching has no effect on glass transition temperature (Tg) reduction efficiency. Biodegradation experiments with the common soil bacterium Rhodococcus rhodocrous in the presence of the plasticizer showed acceptable hydrolysis rates of maleates with unbranched side chains, while the branched DEHM showed almost no degradation. The addition of hexadecane as auxiliary carbon source improved hydrolysis rates. Temporary buildup of the respective monoester of the compounds were observed, but only in the case of the longest molecule, dioctyl maleate (DOM), did this buildup lead to growth inhibition of the bacteria. Maleates with linear side chains, if designed and tested properly, show promise as potential candidate plasticizers as replacements for DEHP.
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Affiliation(s)
- Hanno C Erythropel
- Department of Chemical Engineering, McGill University, Montréal, Québec, Canada
| | - Tobin Brown
- Department of Chemical Engineering, McGill University, Montréal, Québec, Canada
| | - Milan Maric
- Department of Chemical Engineering, McGill University, Montréal, Québec, Canada
| | - Jim A Nicell
- Department of Civil Engineering & Applied Mechanics, McGill University, Montréal, Québec, Canada
| | - David G Cooper
- Department of Chemical Engineering, McGill University, Montréal, Québec, Canada
| | - Richard L Leask
- Department of Chemical Engineering, McGill University, Montréal, Québec, Canada.
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Pruvost R, Boulanger J, Léger B, Ponchel A, Monflier E, Ibert M, Mortreux A, Sauthier M. Biphasic Palladium-Catalyzed Hydroesterification in a Polyol Phase: Selective Synthesis of Derived Monoesters. CHEMSUSCHEM 2015; 8:2133-2137. [PMID: 26040260 DOI: 10.1002/cssc.201403397] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Revised: 03/16/2015] [Indexed: 06/04/2023]
Abstract
The palladium-catalyzed hydroesterification reaction was performed with polyols and olefins in a liquid/liquid biphasic system composed of unreacted polyol on the one hand and apolar reaction products/organic solvents on the other hand. The palladium-based catalyst was immobilized in the polyol phase thanks to the use of cationic triarylphosphines possessing pendent protonated amino groups in the acidic reaction medium or to the sulfonated phosphine TPPTS (trisodium triphenylphosphine-3,3',3''-trisulfonate). Owing to the insolubility of the products in the catalytic phase, this approach allowed the synthesis of monoesters of polyols with high selectivities as well as the easy separation of the catalyst through simple decantation.
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Affiliation(s)
- Romain Pruvost
- Unité de Catalyse et Chimie du Solide, UMR CNRS 8181, Université de Lille 1, ENSCL Bât C7 59650 Villeneuve D'Ascq (France)
| | - Jérôme Boulanger
- UMR 8181 Université d'Artois, Faculté des Sciences Jean Perrin, Rue Jean Souvraz, SP 18-F-62307 Lens (France)
| | - Bastien Léger
- UMR 8181 Université d'Artois, Faculté des Sciences Jean Perrin, Rue Jean Souvraz, SP 18-F-62307 Lens (France)
| | - Anne Ponchel
- UMR 8181 Université d'Artois, Faculté des Sciences Jean Perrin, Rue Jean Souvraz, SP 18-F-62307 Lens (France)
| | - Eric Monflier
- UMR 8181 Université d'Artois, Faculté des Sciences Jean Perrin, Rue Jean Souvraz, SP 18-F-62307 Lens (France)
| | - Mathias Ibert
- Roquette Frères, 1 rue de la Haute Loge F-62136 Lestrem (France)
| | - André Mortreux
- Unité de Catalyse et Chimie du Solide, UMR CNRS 8181, Université de Lille 1, ENSCL Bât C7 59650 Villeneuve D'Ascq (France)
| | - Mathieu Sauthier
- Unité de Catalyse et Chimie du Solide, UMR CNRS 8181, Université de Lille 1, ENSCL Bât C7 59650 Villeneuve D'Ascq (France).
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Wang ZG, Hu YL, Xu WH, Liu S, Hu Y, Zhang Y. Impacts of dimethyl phthalate on the bacterial community and functions in black soils. Front Microbiol 2015; 6:405. [PMID: 25999932 PMCID: PMC4419729 DOI: 10.3389/fmicb.2015.00405] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Accepted: 04/18/2015] [Indexed: 11/13/2022] Open
Abstract
Dimethyl phthalate (DMP), a known endocrine disruptor and one of the phthalate esters (PAEs), is a ubiquitous pollutant. Its impacts on living organisms have aroused great concern. In this study, the impacts of DMP contamination on bacterial communities and functions were tested by using microcosm model in black soils. The results showed that the operational taxonomic unit (OTUs) richness and bacterial diversity were reduced by DMP contamination. The relative percentages of some genera associated with nitrogen metabolism were increased by DMP contamination, while the relative percentages of some other genera that were extremely beneficial to soil health were decreased by DMP contamination. Further, the relative percentages of some genera that possessed the capability to degrade DMP were increased by the DMP treatment at low concentrations (5, 10, and 20 mg/kg), but were decreased by the high concentration DMP treatment (40 mg/kg). Clearly, DMP contamination changed the bacterial community structure and disturbed the metabolic activity and functional diversity of the microbes in black soils. Our results suggest that DMP pollution can alter the metabolism and biodiversity of black soil microorganisms, thereby directly impact fertility and ecosystem functions.
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Affiliation(s)
- Zhi-Gang Wang
- Department of Biotechnology, Institute of Life Science and Agriculture and Forestry, Qiqihar University Qiqihar, China ; Department of Environmental Science and Engineering, Institute of Municipal Environment and Engineering, Harbin Industry University Harbin, China
| | - Yun-Long Hu
- Department of Biotechnology, Institute of Life Science and Agriculture and Forestry, Qiqihar University Qiqihar, China
| | - Wei-Hui Xu
- Department of Biotechnology, Institute of Life Science and Agriculture and Forestry, Qiqihar University Qiqihar, China
| | - Shuai Liu
- Department of Biotechnology, Institute of Life Science and Agriculture and Forestry, Qiqihar University Qiqihar, China
| | - Ying Hu
- Department of Biotechnology, Institute of Life Science and Agriculture and Forestry, Qiqihar University Qiqihar, China
| | - Ying Zhang
- Department of Environmental Science, Institute of Resources and Environment, Northeast Agricultural University Harbin, China
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34
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Ahmadi E, Gholami M, Farzadkia M, Nabizadeh R, Azari A. Study of moving bed biofilm reactor in diethyl phthalate and diallyl phthalate removal from synthetic wastewater. BIORESOURCE TECHNOLOGY 2015; 183:129-35. [PMID: 25727760 DOI: 10.1016/j.biortech.2015.01.122] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Revised: 01/22/2015] [Accepted: 01/28/2015] [Indexed: 05/06/2023]
Abstract
Phthalic acid esters have received significant attention over the last few years since they are considered as priority pollutants. In this study, effects of different operation conditions including hydraulic retention time, phthalates loading rates and aeration rate on process performance of moving bed biofilm reactor (MBBR) for removing diethyl phthalate (DEP) and diallyl phthalate (DAP) from synthetic wastewater was evaluated. In optimum conditions, 94.96% and 93.85% removal efficiency were achieved for DEP and DAP, respectively. Moreover, MBBR achieved to remove more than 92% of COD for both phthalates. The results showed that DEP had a higher biodegradation rate compared to DAP, according to the selected parameters such as half saturation constant, overall reaction rate and maximum specific growth rate. The Grau second order model found as the best model for predicting MBBR performance due to its high correlation coefficients and more conformity of its kinetic coefficients to the results.
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Affiliation(s)
- Ehsan Ahmadi
- Center for Water Quality Research (CWQR), Institute for Environmental Research (IER), Tehran University of Medical Sciences, Tehran, Iran; Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Mitra Gholami
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran.
| | - Mahdi Farzadkia
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Ramin Nabizadeh
- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Ali Azari
- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
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35
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Huang Y, Cui C, Zhang D, Li L, Pan D. Heterogeneous catalytic ozonation of dibutyl phthalate in aqueous solution in the presence of iron-loaded activated carbon. CHEMOSPHERE 2015; 119:295-301. [PMID: 25036944 DOI: 10.1016/j.chemosphere.2014.06.060] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Revised: 06/18/2014] [Accepted: 06/21/2014] [Indexed: 05/27/2023]
Abstract
Iron-loaded activated carbon was prepared and used as catalyst in heterogeneous catalytic ozonation of dibutyl phthalate (DBP). The catalytic activity of iron-loaded activated carbon was investigated under various conditions and the mechanisms of DBP removal were deduced. Characterization of catalyst indicated that the iron loaded on activated carbon was mainly in the form of goethite, which reduced its surface area, pore volume and pore diameter. The presence of metals on activated carbon positively contributed to its catalytic activity in ozonation of DBP. Iron loading content of 15% and initial water pH of 8 achieved highest DBP removal among all the tried conditions. Catalyst dosage of 10 mg L(-1) led to approximately 25% of increase in DBP (initial concentration 2 mg L(-1)) removal in 60 min as compared with ozone alone, and when catalyst dosage increased to 100 mg L(-1), the DBP removal was further improved by 46%. Based on a comparison of reaction rates for direct and indirect transformation of DBP, the increased removal of DBP in this study likely occurred via transformation of ozone into hydroxyl radicals on the catalyst surface.
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Affiliation(s)
- Yuanxing Huang
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Chenchen Cui
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Daofang Zhang
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Liang Li
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China.
| | - Ding Pan
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
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36
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Leaching of the plasticizer di(2-ethylhexyl)phthalate (DEHP) from plastic containers and the question of human exposure. Appl Microbiol Biotechnol 2014; 98:9967-81. [PMID: 25376446 DOI: 10.1007/s00253-014-6183-8] [Citation(s) in RCA: 265] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Revised: 10/20/2014] [Accepted: 10/24/2014] [Indexed: 01/19/2023]
Abstract
Di(2-ethylhexyl)phthalate (DEHP) is a widely used plasticizer to render poly(vinyl chloride) (PVC) soft and malleable. Plasticized PVC is used in hospital equipment, food wrapping, and numerous other commercial and industrial products. Unfortunately, plasticizers can migrate within the material and leach out of it over time, ending up in the environment and, frequently, the human body. DEHP has come under increased scrutiny as its breakdown products are believed to be endocrine disruptors and more toxic than DEHP itself. DEHP and its breakdown products have been identified as ubiquitous environmental contaminants, and daily human exposure is estimated to be in the microgram per kilogram level. The objective of this review is to summarize and comment on published sources of DEHP exposure and to give an overview of its environmental fate. Exposure through bottled water was examined specifically, as this concern is raised frequently, yet only little exposure to DEHP occurs through bottled water, and DEHP exposure is unlikely to stem from the packaging material itself. Packaged food was also examined and showed higher levels of DEHP contamination compared to bottled water. Exposure to DEHP also occurs in hospital environments, where DEHP leaches directly into liquids that passed through PVC/DEHP tubing and equipment. The latter exposure is at considerably higher levels compared to food and bottled water, specifically putting patients with chronic illnesses at risk. Overall, levels of DEHP in food and bottled water were below current tolerable daily intake (TDI) values. However, our understanding of the risks of DEHP exposure is still evolving. Given the prevalence of DEHP in our atmosphere and environment, and the uncertainty revolving around it, the precautionary principle would suggest its phaseout and replacement. Increased efforts to develop viable replacement compounds, which necessarily includes rigorous leaching, toxicity, and impact assessment studies, are needed before alternative plasticizers can be adopted as viable replacements.
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37
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Marceneiro S, Hu Q, Dias AMA, Lobo I, Dias I, de Pinho E, Rasteiro MG, de Sousa HC. Effects of Two Phosphonium-Type Ionic Liquids on the Rheological and Thermomechanical Properties of Emulsion Poly(vinyl chloride)-Based Formulations Plasticized with DINP and CITROFOL. Ind Eng Chem Res 2014. [DOI: 10.1021/ie502382a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sofia Marceneiro
- CIEPQPF,
Chemical Engineering Department, FCTUC, University of Coimbra, Rua Sílvio Lima, Pólo II—Pinhal de Marrocos, 3030-790 Coimbra, Portugal
- TMG Automotive, Apartado
14, São Cosme do Vale, 4761-912 Vila Nova de Famalicão, Portugal
| | - Qingyun Hu
- CIEPQPF,
Chemical Engineering Department, FCTUC, University of Coimbra, Rua Sílvio Lima, Pólo II—Pinhal de Marrocos, 3030-790 Coimbra, Portugal
| | - Ana M. A. Dias
- CIEPQPF,
Chemical Engineering Department, FCTUC, University of Coimbra, Rua Sílvio Lima, Pólo II—Pinhal de Marrocos, 3030-790 Coimbra, Portugal
| | - Irene Lobo
- TMG Automotive, Apartado
14, São Cosme do Vale, 4761-912 Vila Nova de Famalicão, Portugal
| | - Isabel Dias
- TMG Automotive, Apartado
14, São Cosme do Vale, 4761-912 Vila Nova de Famalicão, Portugal
| | - Elizabete de Pinho
- TMG Automotive, Apartado
14, São Cosme do Vale, 4761-912 Vila Nova de Famalicão, Portugal
| | - M. Graça Rasteiro
- CIEPQPF,
Chemical Engineering Department, FCTUC, University of Coimbra, Rua Sílvio Lima, Pólo II—Pinhal de Marrocos, 3030-790 Coimbra, Portugal
| | - Hermínio C. de Sousa
- CIEPQPF,
Chemical Engineering Department, FCTUC, University of Coimbra, Rua Sílvio Lima, Pólo II—Pinhal de Marrocos, 3030-790 Coimbra, Portugal
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38
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Dutta K, Das S, Kundu PP. Epoxidized Esters of Palm Kernel Oil as an Effective Plasticizer for PVC: A Study of Mechanical Properties and Effect of Processing Conditions. INT POLYM PROC 2014. [DOI: 10.3139/217.2922] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
One of the most commonly used vegetable oil plasticizer in polyvinyl chloride (PVC) is epoxidized soybean oil (ESBO). On the contrary, epoxidized palm oil is among the least used, because of its low compatibility with PVC. This work reports that epoxidized and esterified palm kernel oil (EEPKO) has the potential to be used as a plasticizer for PVC. In this study, it was found that a maximum of 65 phr of EEPKO could be incorporated within the PVC resin. In addition, subjecting this EEPKO plasticized PVC (p-PVC) at a processing temperature of 200 °C resulted in much reduced plasticizer loss. EEPKO lowers the glass transition temperature of PVC from 79 °C to −23 °C. The optimum mechanical properties, namely tensile strength, elongation at break and hardness, were obtained for p-PVC processed at 200 °C.
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Affiliation(s)
- K. Dutta
- Advanced Polymer Laboratory , Department of Polymer Science and Technology, University of Calcutta , India
| | - S. Das
- Advanced Polymer Laboratory , Department of Polymer Science and Technology, University of Calcutta , India
| | - P. P. Kundu
- Advanced Polymer Laboratory , Department of Polymer Science and Technology, University of Calcutta , India
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39
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Saltos JA, Shi W, Mancuso A, Sun C, Park T, Averick N, Punia K, Fata J, Raja K. Curcumin-derived green plasticizers for poly(vinyl) chloride. RSC Adv 2014. [DOI: 10.1039/c4ra10581h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Environmentally friendly, highly effective, and non-cytotoxic curcumin-derived plasticizer for poly(vinyl chloride) was synthesized via a high atom economic route.
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Affiliation(s)
- José A. Saltos
- College of Staten Island
- Department of Chemistry
- Staten Island, USA
| | - Wei Shi
- College of Staten Island
- Department of Chemistry
- Staten Island, USA
| | - Andrew Mancuso
- College of Staten Island
- Department of Chemistry
- Staten Island, USA
| | - Chong Sun
- College of Staten Island
- Department of Chemistry
- Staten Island, USA
| | - Tai Park
- College of Staten Island
- Department of Chemistry
- Staten Island, USA
| | - Nechama Averick
- College of Staten Island
- Department of Chemistry
- Staten Island, USA
| | - Kamia Punia
- College of Staten Island
- Department of Chemistry
- Staten Island, USA
| | - Jimmie Fata
- College of Staten Island
- Department of Biology
- Staten Island, USA
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40
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Wagner M, Schlüsener MP, Ternes TA, Oehlmann J. Identification of putative steroid receptor antagonists in bottled water: combining bioassays and high-resolution mass spectrometry. PLoS One 2013; 8:e72472. [PMID: 24015248 PMCID: PMC3756062 DOI: 10.1371/journal.pone.0072472] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Accepted: 07/11/2013] [Indexed: 12/15/2022] Open
Abstract
Endocrine disrupting chemicals (EDCs) are man-made compounds interfering with hormone signaling and thereby adversely affecting human health. Recent reports provide evidence for the presence of EDCs in commercially available bottled water, including steroid receptor agonists and antagonists. However, since these findings are based on biological data the causative chemicals remain unidentified and, therefore, inaccessible for toxicological evaluation. Thus, the aim of this study is to assess the antiestrogenic and antiandrogenic activity of bottled water and to identify the causative steroid receptor antagonists. We evaluated the antiestrogenic and antiandrogenic activity of 18 bottled water products in reporter gene assays for human estrogen receptor alpha and androgen receptor. Using nontarget high-resolution mass spectrometry (LTQ-Orbitrap Velos), we acquired corresponding analytical data. We combined the biological and chemical information to determine the exact mass of the tentative steroid receptor antagonist. Further MSn experiments elucidated the molecule’s structure and enabled its identification. We detected significant antiestrogenicity in 13 of 18 products. 16 samples were antiandrogenic inhibiting the androgen receptor by up to 90%. Nontarget chemical analysis revealed that out of 24520 candidates present in bottled water one was consistently correlated with the antagonistic activity. By combining experimental and in silico MSn data we identified this compound as di(2-ethylhexyl) fumarate (DEHF). We confirmed the identity and biological activity of DEHF and additional isomers of dioctyl fumarate and maleate using authentic standards. Since DEHF is antiestrogenic but not antiandrogenic we conclude that additional, yet unidentified EDCs must contribute to the antagonistic effect of bottled water. Applying a novel approach to combine biological and chemical analysis this is the first study to identify so far unknown EDCs in bottled water. Notably, dioctyl fumarates and maleates have been overlooked by science and regulation to date. This illustrates the need to identify novel toxicologically relevant compounds to establish a more holistic picture of the human exposome.
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Affiliation(s)
- Martin Wagner
- Department Aquatic Ecotoxicology, Faculty of Biological Sciences, Goethe University Frankfurt, Frankfurt am Main, Germany
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41
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Erythropel HC, Dodd P, Leask RL, Maric M, Cooper DG. Designing green plasticizers: influence of alkyl chain length on biodegradation and plasticization properties of succinate based plasticizers. CHEMOSPHERE 2013; 91:358-365. [PMID: 23340052 DOI: 10.1016/j.chemosphere.2012.11.061] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2012] [Revised: 11/07/2012] [Accepted: 11/22/2012] [Indexed: 06/01/2023]
Abstract
Phthalate diesters such as di (2-ethylhexyl) phthalate (DEHP) are considered ubiquitous contaminants and are poorly biodegraded in the environment. Moreover, both the parent compound and stable metabolites such as mono (2-ethylhexyl) phthalate (MEHP) are linked to several negative impacts on the environment and human health. Earlier work established that saturated diester compounds, such as succinates, showed better biodegradation characteristics and comparable plasticizer properties compared to DEHP. In this work we examine the effect of alkyl chain length of succinate molecules on plasticizer and biodegradation properties. This included both the side chains (n-ethyl to n-octyl) as well as substituents on the middle part of the succinate molecule. We showed that the common soil bacterium Rhodococcus rhodocrous could rapidly break down all unsubstituted succinates, without the appearance of stable metabolites. Furthermore, the organisms used the plasticizer metabolites as carbon source. The introduction of a large cyclohexyl substituent on the succinate resulted in a poorer degradation rate. Glass Transition Temperature (Tg) measurements were performed to evaluate plasticizer properties and showed that longer side chains reduced the Tg more efficiently, while large cyclohexyl substituents on the succinate decreased this effect. However, all compounds performed better or equal to DEHP at reducing the Tg.
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Affiliation(s)
- Hanno C Erythropel
- McGill University, Department of Chemical Engineering, Wong Building, 3610 Rue University, Montréal, Québec, Canada H3A 2B2.
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42
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Segura PA, Kaplan P, Erythropel HC, Yargeau V. Comparative Rapid Toxicity Screening of Commercial and Potential “Green” Plasticizers Using Bioluminescent Bacteria. Ind Eng Chem Res 2012. [DOI: 10.1021/ie300875g] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Pedro A. Segura
- Department of Chemical Engineering, McGill University, 3610 University, Montreal, QC H3A 2B2, Canada
| | - Pearl Kaplan
- Department of Chemical Engineering, McGill University, 3610 University, Montreal, QC H3A 2B2, Canada
| | - Hanno C. Erythropel
- Department of Chemical Engineering, McGill University, 3610 University, Montreal, QC H3A 2B2, Canada
| | - Viviane Yargeau
- Department of Chemical Engineering, McGill University, 3610 University, Montreal, QC H3A 2B2, Canada
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43
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Kastner J, Cooper DG, Marić M, Dodd P, Yargeau V. Aqueous leaching of di-2-ethylhexyl phthalate and "green" plasticizers from poly(vinyl chloride). THE SCIENCE OF THE TOTAL ENVIRONMENT 2012; 432:357-64. [PMID: 22750182 DOI: 10.1016/j.scitotenv.2012.06.014] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2012] [Revised: 05/23/2012] [Accepted: 06/05/2012] [Indexed: 05/21/2023]
Abstract
A method was developed to assess leaching of several poly(vinyl chloride) (PVC) plasticizers in aqueous media using gas chromatography (GC), and compared to a gravimetric standard test method (ASTM Method D1239). The GC method was a more direct measurement of plasticizer concentration in the aqueous phase. The leaching of commercial plasticizers, as well as several series of "green" candidate plasticizers, were assessed as a function of their molecular characteristics and compared to the industry standard PVC plasticizer, di-2-ethylhexyl phthalate (DEHP). It was found that plasticizers containing longer alkyl chains or non-polar branching emanating from polar structural units, increased the hydrophobicity of the molecule and reduced its aqueous leaching rate. Several "green" plasticizer candidates were found to minimize aqueous leaching to rates ten times below that of DEHP; notably dioctyl succinate (DOS), dihexyl maleate (DHM), methyl cyclohexyl diester (MCDE), diethylhexyl succinate (DEHS), hexanediol dibenzoate (C6), and the commercially available Hexamoll® DINCH.
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Affiliation(s)
- Joshua Kastner
- McGill University, Department of Chemical Engineering, 3610 University, Montreal, Quebec, Canada H3A 2B2
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