151
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Pérez-Pantoja D, Nikel PI, Chavarría M, de Lorenzo V. Transcriptional control of 2,4-dinitrotoluene degradation in Burkholderia sp. R34 bears a regulatory patch that eases pathway evolution. Environ Microbiol 2021; 23:2522-2531. [PMID: 33734558 DOI: 10.1111/1462-2920.15472] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 02/27/2021] [Accepted: 03/16/2021] [Indexed: 11/26/2022]
Abstract
The dnt pathway of Burkholderia sp. R34 is in the midst of an evolutionary journey from its ancestral, natural substrate (naphthalene) towards a new xenobiotic one [2,4-dinitrotoluene (DNT)]. The gene cluster encoding the leading multicomponent ring dioxygenase (DntA) has activity on the old and the new substrate, but it is induced by neither. Instead, the transcriptional factor encoded by the adjacent gene (dntR) activates expression of the dnt cluster upon addition of salicylate, one degradation intermediate of the ancestral naphthalene route but not any longer a substrate/product of the evolved DntA enzyme. Fluorescence of cells bearing dntA-gfp fusions revealed that induction of the dnt genes by salicylate was enhanced upon exposure to bona fide DntA substrates, i.e., naphthalene or DNT. Such amplification was dependent on effective dioxygenation of these pathway-specific head compounds, which thereby fostered expression of the cognate catabolic operon. The phenomenon seems to happen not through direct binding to a cognate transcriptional factor but through the interplay of a non-specific regulator with a substrate-specific enzyme. This regulatory scenario may ease transition of complete catabolic operons (i.e. enzymes plus regulatory devices) from one substrate to another without loss of fitness during the evolutionary roadmap between two optimal specificities.
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Affiliation(s)
- Danilo Pérez-Pantoja
- Programa Institucional de Fomento a la Investigación, Desarrollo e Innovación (PIDi), Universidad Tecnológica Metropolitana, Santiago, 8940577, Chile
| | - Pablo I Nikel
- The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Kgs Lyngby, 2800, Denmark
| | - Max Chavarría
- Escuela de Química and CIPRONA, Universidad de Costa Rica, San José, 2060, Costa Rica
| | - Víctor de Lorenzo
- Systems and Synthetic Biology Department, Centro Nacional de Biotecnología (CNB-CSIC), Madrid, 28049, Spain
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152
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Kannigadu C, N'Da DD. Recent Advances in the Synthesis and Development of Nitroaromatics as Anti-Infective Drugs. Curr Pharm Des 2021; 26:4658-4674. [PMID: 32228417 DOI: 10.2174/1381612826666200331091853] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Accepted: 02/28/2020] [Indexed: 12/24/2022]
Abstract
Infectious diseases commonly occur in tropical and sub-tropical countries. The pathogens of such diseases are able to multiply in human hosts, warranting their continual survival. Infections that are commonplace include malaria, chagas, trypanosomiasis, giardiasis, amoebiasis, toxoplasmosis and leishmaniasis. Malaria is known to cause symptoms, such as high fever, chills, nausea and vomiting, whereas chagas disease causes enlarged lymph glands, muscle pain, swelling and chest pain. People suffering from African trypanosomiasis may experience severe headaches, irritability, extreme fatigue and swollen lymph nodes. As an infectious disease progresses, the human host may also experience personality changes and neurologic problems. If left untreated, most of these diseases can lead to death. Parasites, microbes and bacteria are increasingly adapting and generating strains that are resistant to current clinical drugs. Drug resistance creates an urgency for the development of new drugs to treat these infections. Nitro containing drugs, such as chloramphenicol, metronidazole, tinidazole and secnidazole had been banned for use as antiparasitic agents due to their toxicity. However, recent discoveries of nitrocontaining anti-tuberculosis drugs, i.e. delamanid and pretonamid, and the repurposing of flexinidazole for use in combination with eflornithine for the treatment of human trypanosomiasis, have ignited interest in nitroaromatic scaffolds as viable sources of potential anti-infective agents. This review highlights the differences between old and new nitration methodologies. It furthermore offers insights into recent advances in the development of nitroaromatics as anti-infective drugs.
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Affiliation(s)
- Christina Kannigadu
- Centre of Excellence for Pharmaceutical Sciences (PharmacenTM), North-West University, Potchefstroom, South Africa
| | - David D N'Da
- Centre of Excellence for Pharmaceutical Sciences (PharmacenTM), North-West University, Potchefstroom, South Africa
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153
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Green Synthesis of Ag-Au Bimetallic Nanocomposites Using Waste Tea Leaves Extract for Degradation Congo Red and 4-Nitrophenol. SUSTAINABILITY 2021. [DOI: 10.3390/su13063318] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A sustainable supply of pure water is a great challenge in most developing and third-world countries. Nanomaterial-based technology offers technological development for wastewater purification. Nanocatalysis hydrogenation of nitroarene and dye molecules is a hot model in many research fields. Herein, we report eco-friendly and facile technology to synthesize Ag-Au bimetallic nanocomposites. The synthesized nanocomposites are characterized by ultraviolet–visible spectroscopy, Fourier-transform infrared spectroscopy, X-ray diffraction, field emission scanning electron microscopy and high-resolution transmission electron microscopy. The synthesized nanocomposite can efficiently degrade Congo red and 4-nitrophenol in water and in the presence of sodium borohydride. The results show that it degrades Congo red and 4-nitrophenol entirely within 6 and 7 min, respectively. These results could be useful for the green synthesis of Ag-Au bimetallic nanocomposites and help to remove organic dye molecules and nitroaromatics from wastewater.
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154
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Yang F, Jian H, Wang C, Wang Y, Li E, Sun H. Effects of biochar on biodegradation of sulfamethoxazole and chloramphenicol by Pseudomonas stutzeri and Shewanella putrefaciens: Microbial growth, fatty acids, and the expression quantity of genes. JOURNAL OF HAZARDOUS MATERIALS 2021; 406:124311. [PMID: 33257131 DOI: 10.1016/j.jhazmat.2020.124311] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 09/27/2020] [Accepted: 10/15/2020] [Indexed: 06/12/2023]
Abstract
An incubation experiment was conducted to investigate whether different biochar could enhance the biodegradation of sulfamethoxazole (SMX) and chloramphenicol (CAP). During incubation in nutrient medium solution, the degradation efficiencies of SMX by P. stutzeri and S. putrefaciens obtained 61.79% and 68.67% respectively, while CAP was 85.75% and 85.70%. The biodegradation efficiencies of SMX and CAP increased for P. stutzeri cultured with biochar and increased for S. putrefaciens cultured with high-concentration biochar (500, 1,000, 2,000 mg L-1). Additionally, TOC and TN contents were significantly decreased during the biodegradation process. Hence, the effects of biochar on microbial growth, fatty acids and expression genes, biodegradation products were studied. The content of bacteria, saturated fatty acids and expression genes showed a positive correlation with the content of TOC released from biochar, while the biodegradation products would not change when bacteria was cultured with biochar. These indicated that biochar improved the antibiotics biodegradation efficiencies via involvement in the bacterial growth, changing the components of fatty acids, increasing the expression quantity of genes. This research suggests that micro-biological degradation with biochar is a promising technology to treat specific antibiotics in the environment.
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Affiliation(s)
- Fang Yang
- Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China
| | - Hongxian Jian
- Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China
| | - Cuiping Wang
- Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China.
| | - Yu Wang
- Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China
| | - Erhu Li
- Tianjin Agriculture Ecological Environment Monitoring and Agricultural Product Quality Testing Centre, Tianjin 300191, China
| | - Hongwen Sun
- Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China
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155
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Nóbile ML, Stricker AM, Marchesano L, Iribarren AM, Lewkowicz ES. N-oxygenation of amino compounds: Early stages in its application to the biocatalyzed preparation of bioactive compounds. Biotechnol Adv 2021; 51:107726. [PMID: 33675955 DOI: 10.1016/j.biotechadv.2021.107726] [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: 11/16/2020] [Revised: 02/25/2021] [Accepted: 02/26/2021] [Indexed: 10/22/2022]
Abstract
Among the compounds that contain unusual functional groups, nitro is perhaps one of the most interesting due to the valuable properties it confers on pharmaceuticals and explosives. Traditional chemistry has for many years used environmentally unfriendly strategies; in contrast, the biocatalyzed production of this type of products offers a promising alternative. The small family of enzymes formed by N-oxygenases allows the conversion of an amino group to a nitro through the sequential addition of oxygen. These enzymes also make it possible to obtain other less oxidized N-O functions, such as hydroxylamine or nitroso, present in intermediate or final products. The current substrates on which these enzymes are reported to work encompass a few aromatic molecules and sugars. The unique characteristics of N-oxygenases and the great economic value of the products that they could generate, place them in a position of very high scientific and industrial interest. The most important and best studied N-oxygenases will be presented here.
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Affiliation(s)
- Matías L Nóbile
- Universidad Nacional de Quilmes, CONICET, Departamento de Ciencia y Tecnología, Biocatalysis and Biotransformation Laboratory, Roque Sáenz Peña 352, Bernal 1876, Buenos Aires, Argentina.
| | - Abigail M Stricker
- Universidad Nacional de Quilmes, CONICET, Departamento de Ciencia y Tecnología, Biocatalysis and Biotransformation Laboratory, Roque Sáenz Peña 352, Bernal 1876, Buenos Aires, Argentina
| | - Lucas Marchesano
- Universidad Nacional de Quilmes, CONICET, Departamento de Ciencia y Tecnología, Biocatalysis and Biotransformation Laboratory, Roque Sáenz Peña 352, Bernal 1876, Buenos Aires, Argentina
| | - Adolfo M Iribarren
- Universidad Nacional de Quilmes, CONICET, Departamento de Ciencia y Tecnología, Biocatalysis and Biotransformation Laboratory, Roque Sáenz Peña 352, Bernal 1876, Buenos Aires, Argentina
| | - Elizabeth S Lewkowicz
- Universidad Nacional de Quilmes, CONICET, Departamento de Ciencia y Tecnología, Biocatalysis and Biotransformation Laboratory, Roque Sáenz Peña 352, Bernal 1876, Buenos Aires, Argentina
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156
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Achilli S, Berthet N, Renaudet O. Antibody recruiting molecules (ARMs): synthetic immunotherapeutics to fight cancer. RSC Chem Biol 2021; 2:713-724. [PMID: 34212148 PMCID: PMC8190906 DOI: 10.1039/d1cb00007a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Antibody-recruiting molecules (ARMs) are one of the most promising tools to redirect the immune response towards cancer cells. In this review, we aim to highlight the recent advances in the field. We will illustrate the advantages of different ARM approaches and emphasize the importance of a multivalent presentation of the binding units. Antibody-recruiting molecules (ARMs) are one of the most promising tools to redirect the immune response towards cancer cells.![]()
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Affiliation(s)
- Silvia Achilli
- Univ. Grenoble Alpes, CNRS DCM UMR 5250 F-38000 Grenoble France
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157
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Interaction studies of nitrotoluene and toluidine molecules on novel square-octagon arsenene nanotubes based on DFT method. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.115260] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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158
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Veisi H, Karmakar B, Tamoradi T, Tayebee R, Sajjadifar S, Lotfi S, Maleki B, Hemmati S. Bio-inspired synthesis of palladium nanoparticles fabricated magnetic Fe 3O 4 nanocomposite over Fritillaria imperialis flower extract as an efficient recyclable catalyst for the reduction of nitroarenes. Sci Rep 2021; 11:4515. [PMID: 33633123 PMCID: PMC7907383 DOI: 10.1038/s41598-021-83854-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 02/04/2021] [Indexed: 11/14/2022] Open
Abstract
This current research is based on a bio-inspired procedure for the synthesis of biomolecule functionalized hybrid magnetic nanocomposite with the Fe3O4 NPs at core and Pd NPs at outer shell. The central idea was the initial modification of magnetic NP by the phytochemicals from Fritillaria imperialis flower extract, which was further exploited in the green reduction of Pd2+ ions into Pd NPs, in situ. The flower extract also acted as a capping agent for the obtained Pd/Fe3O4 composite without the need of additional toxic reagents. The as-synthesized Fe3O4@Fritillaria/Pd nanocomposite was methodically characterized over different physicochemical measures like FT-IR, ICP-AES, FESEM, EDX, TEM, XPS and VSM analysis. Thereafter, its catalytic potential was evaluated in the reduction of various nitrobenzenes to arylamines applying hydrazine hydrate as reductant in ethanol/water (1:2) medium under mild conditions. Furthermore, the nanocatalyst was retrieved using a bar magnet and recycled several times without considerable leaching or loss of activity. This green, bio-inspired ligand-free protocol has remarkable advantages like environmental friendliness, high yields, easy workup and reusability of the catalyst.
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Affiliation(s)
- Hojat Veisi
- Department of Chemistry, Payame Noor University, Tehran, Iran.
| | - Bikash Karmakar
- Department of Chemistry, Gobardanga Hindu College, North 24, Parganas, India.
| | | | - Reza Tayebee
- Department of Chemistry, Hakim Sabzevari University, 96179-76487, Sabzevar, Iran
| | - Sami Sajjadifar
- Department of Chemistry, Payame Noor University, Tehran, Iran
| | - Shahram Lotfi
- Department of Chemistry, Payame Noor University, Tehran, Iran
| | - Behrooz Maleki
- Department of Chemistry, Hakim Sabzevari University, 96179-76487, Sabzevar, Iran
| | - Saba Hemmati
- Department of Chemistry, Payame Noor University, Tehran, Iran
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159
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Highly selective detection of nitroaromatic explosive 2,4,6-trinitrophenol (TNP) using N-doped carbon dots. RESEARCH ON CHEMICAL INTERMEDIATES 2021. [DOI: 10.1007/s11164-021-04410-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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160
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Peng Y, Mu Y, Xue C, Chen A, Peng L, Wu H, Luo S. Cysteine-enhanced reductive degradation of nitrobenzene using nano-sized zero-valent iron by accelerated electron transfer. J Environ Sci (China) 2021; 100:110-116. [PMID: 33279024 DOI: 10.1016/j.jes.2020.07.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 07/17/2020] [Accepted: 07/17/2020] [Indexed: 06/12/2023]
Abstract
As an aliphatic amino acid, cysteine (CYS) is diffuse in the living cells of plants and animals. However, little is known of its role in the reactivity of nano-sized zero-valent iron (NZVI) in the degradation of pollutants. This study shows that the introduction of CYS to the NZVI system can help improve the efficiency of reduction, with 30% more efficient degradation and a reaction rate constant nine times higher when nitrobenzene (NB) is used as probe compound. The rates of degradation of NB were positively correlated with the range of concentrations of CYS from 0 to 10 mmol/L. The introduction of CYS increased the maximum concentration of Fe(III) by 12 times and that of Fe(II) by four times in this system. A comparison of systems featuring only CYS or Fe(II) showed that the direct reduction of NB was not the main factor influencing its CYS-stimulated removal. The reduction in the concentration of CYS was accompanied by the generation of cystine (CY, the oxidized form of cysteine), and both eventually became stable. The introduction of CY also enhanced NB degradation due to NZVI, accompanied by the regeneration of CYS. This supports the claim that CYS can accelerate electron transfer from NZVI to NB, thus enhancing the efficiency of degradation of NB.
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Affiliation(s)
- Yuanming Peng
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Yunsong Mu
- School of Environment & Natural Resources, Renmin University of China, Beijing 100872, China
| | - Chao Xue
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Anwei Chen
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Liang Peng
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Haiyong Wu
- Soil and Fertilizer Institute of Hunan Province, Hunan Academy of Agricultural Sciences, Changsha 401125, China.
| | - Si Luo
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China.
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161
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Lava R, Calore F, Mazzola M, Moretto CG, Pretto U, Salmaso P, Bizzotto A, Carvutto R, Acerbi M, Tommasi J, Marcomini A. Groundwater contamination by fluorinated aromatics: Benzotrifluoride and its derivatives. CHEMOSPHERE 2021; 265:129029. [PMID: 33277002 DOI: 10.1016/j.chemosphere.2020.129029] [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: 07/13/2020] [Revised: 10/27/2020] [Accepted: 11/15/2020] [Indexed: 06/12/2023]
Abstract
Benzotrifluoride (BTF) and its derivatives (BTFs) were found in the groundwater of the Veneto region (Italy) as a result of industrial contamination dating back to the 1970s. In the first survey, BTF and 6 BTFs were identified, out of which 4-chloro-3nitrobenzotrifluoride (3N4CBTF) was the only quantified analyte (concentration up to 1 mg L-1) and was used to trace the contamination plume. A survey carried out in 2008-2009 after the development of more suitable analytical procedures based on GC-MS, allowed to determine 4 new derivatives in addition to BTF and BTFs previously identified, with the most abundant compounds found at concentrations up to 11.9 μg L-1 and 7.2 μg L-1 respectively. A systematic monitoring program for the evaluation of persistence and distribution of fluorinated compounds was carried out in 2013-2018, and new data about the BTF and BTFs occurrence and distribution were gathered. Additional BTFs were identified and high concentrations of individual BTFs were recorded near the contamination source (e.g. 20.3 μg L-1 of 4-chloro-3-nitrobenzotrifluoride in 2017) as well as at large distance (e.g. 22.4 μg L-1 of 3N4CBTF and 12.5 μg L-1 of 4-chlorobenzotrifluoride in 2018). The results of BTFs monitoring campaigns carried out in 2008-2009 and 2017-2018 are compared and related to the historical data to assess the overall occurrence and distribution of BTFs contamination over a time range of ∼40 years. Remarkably, BTFs were still found (2018) at μg L-1 range. Spatial and temporal occurrence of BTF and BTFs in groundwater has been assessed for the first time.
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Affiliation(s)
- Roberto Lava
- Veneto East Regional Laboratory Department ARPAV (Environmental Prevention and Protection Agency of Veneto Region), Via Lissa 6, Mestre Venice, 30174, Italy; Department of Environmental Sciences, Informatics and Statistics, University Ca' Foscari of Venice, Via Torino 155, Mestre Venice, 30172, Italy
| | - Francesco Calore
- Department of Environmental Sciences, Informatics and Statistics, University Ca' Foscari of Venice, Via Torino 155, Mestre Venice, 30172, Italy
| | - Massimo Mazzola
- Regional Department for Safety of the Territory ARPAV (Environmental Prevention and Protection Agency of Veneto Region), Via Zamenhof 353, Vicenza, 36100, Italy
| | - Carlo Giovanni Moretto
- Inland Water Observatory ARPAV (Environmental Prevention and Protection Agency of Veneto Region), Via Rezzonico 41, Padua, 35131, Italy
| | - Ugo Pretto
- Provincial Department ARPAV (Environmental Prevention and Protection Agency of Veneto Region), Via Zamenhof 353, Vicenza, 36100, Italy
| | - Paola Salmaso
- Provincial Department ARPAV (Environmental Prevention and Protection Agency of Veneto Region), Via Zamenhof 353, Vicenza, 36100, Italy
| | - Alessandro Bizzotto
- Provincial Department ARPAV (Environmental Prevention and Protection Agency of Veneto Region), Via Zamenhof 353, Vicenza, 36100, Italy
| | - Rosi Carvutto
- Veneto West Regional Laboratory Department ARPAV (Environmental Prevention and Protection Agency of Veneto Region), Via Dominutti 8, Verona, 37135, Italy
| | - Mauro Acerbi
- Veneto West Regional Laboratory Department ARPAV (Environmental Prevention and Protection Agency of Veneto Region), Via Dominutti 8, Verona, 37135, Italy
| | - Jgor Tommasi
- Veneto West Regional Laboratory Department ARPAV (Environmental Prevention and Protection Agency of Veneto Region), Via Dominutti 8, Verona, 37135, Italy
| | - Antonio Marcomini
- Department of Environmental Sciences, Informatics and Statistics, University Ca' Foscari of Venice, Via Torino 155, Mestre Venice, 30172, Italy.
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162
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Green Synthesis of Reduced Graphene Oxide-Supported Palladium Nanoparticles by Coleus amboinicus and Its Enhanced Catalytic Efficiency and Antibacterial Activity. CRYSTALS 2021. [DOI: 10.3390/cryst11020134] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Novel reduced graphene oxide-supported palladium nanoparticles (RGO-PN) were synthesized under ultrasonication, a method that utilizes Coleus amboinicus as a bio-reduction agent. Green synthesized RGO-PN nanoparticles with a crystallite size in the range of 40–50 nm were confirmed in X-ray diffraction (XRD) spectra. RGO-PN show an absorption peak at 220 nm while reduced graphene oxide (RGO) shows its maximal absorbance at 210 nm. The scanning electron microscope image revealed that 40-nm-sized spherical-shaped palladium nanoparticles stick well to reduced graphene oxide sheets, which is consistent and correlated well with the XRD pattern. Moreover, a high-resolution morphological image of RGO-PN100 was obtained by TEM analysis, which shows the anchoring of palladium nanoparticles (PN) on RGO nanosheets. Green synthesized RGO-PN100 nanoparticles from Coleus amboinicus show better reduction kinetics for 4-nitrophenol at 40 min, suggesting that RGO-PN prepared from Coleus amboinicus serve as an excellent catalytic reducing agent. Furthermore, they show remarkable antibacterial activity against Escherichia coli (ATCC 25922). Thus, green synthesized RGO-supported palladium nanoparticles demonstrated that enhanced catalytic activity and antibacterial activity both play an important role in the environmental and medical disciplines.
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163
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Khutorianskyi VV, Baris N, Beier P. Oxidative nucleophilic alkoxylation of nitrobenzenes. Org Chem Front 2021. [DOI: 10.1039/d0qo01291b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Oxidative nucleophilic aromatic substitution of hydrogen in nitroaromatics with potassium alkoxides is reported.
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Affiliation(s)
- Viktor V. Khutorianskyi
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences
- Czech Republic
| | - Norbert Baris
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences
- Czech Republic
| | - Petr Beier
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences
- Czech Republic
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164
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Geng TM, Liu M, Hu C, Zhu H. The synthesis of conjugated microporous polymers via nucleophilic substitution of hydroquinone with cyanuric chloride and hexachlorocyclotriphosphazene for sensing to 2,4-dinitrophenol and 2,4,6-trinitrophenol. NEW J CHEM 2021. [DOI: 10.1039/d0nj06099b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Hydroquinone is an electron-rich connector similar in structure to DNP and TNP. Two hydroquinone-based conjugated microporous polymers have excellent fluorescence sensing performance for DNP and TNP, respectively.
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Affiliation(s)
- Tong-Mou Geng
- AnHui Province Key Laboratory of Optoelectronic and Magnetism Functional Materials
- School of Chemistry and Chemical Engineering
- Anqing Normal University
- Anqing 246011
- P. R. China
| | - Min Liu
- AnHui Province Key Laboratory of Optoelectronic and Magnetism Functional Materials
- School of Chemistry and Chemical Engineering
- Anqing Normal University
- Anqing 246011
- P. R. China
| | - Chen Hu
- AnHui Province Key Laboratory of Optoelectronic and Magnetism Functional Materials
- School of Chemistry and Chemical Engineering
- Anqing Normal University
- Anqing 246011
- P. R. China
| | - Hai Zhu
- AnHui Province Key Laboratory of Optoelectronic and Magnetism Functional Materials
- School of Chemistry and Chemical Engineering
- Anqing Normal University
- Anqing 246011
- P. R. China
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165
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Liu R, Markley L, Miller PA, Franzblau S, Shetye G, Ma R, Savková K, Mikušová K, Lee BS, Pethe K, Moraski GC, Miller MJ. Hydride-induced Meisenheimer complex formation reflects activity of nitro aromatic anti-tuberculosis compounds. RSC Med Chem 2021; 12:62-72. [PMID: 34046598 PMCID: PMC8130608 DOI: 10.1039/d0md00390e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 12/13/2020] [Indexed: 11/21/2022] Open
Abstract
The formation efficiency of hydride-induced Meisenheimer complexes of nitroaromatic compounds is consistent with their anti-TB activities exemplied by MDL860 and benzothiazol N-oxide (BTO) analogs. Herein we report that nitro cyano phenoxybenzenes (MDL860 and analogs) reacted slowly and incompletely which reflected their moderate anti-TB activity, in contrast to the instantaneous reaction of BTO derivatives to quantitatively generate Meisenheimer complexes which corresponded to their enhanced anti-TB activity. These results were corroborated by mycobacterial and radiolabelling studies that confirmed inhibition of the DprE1 enzyme by BTO derivatives but not MDL860 analogs.
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Affiliation(s)
- Rui Liu
- Department of Chemistry and Biochemistry, University of Notre Dame Notre Dame IN 46556 USA
| | - Lowell Markley
- Department of Chemistry and Biochemistry, University of Notre Dame Notre Dame IN 46556 USA
| | - Patricia A Miller
- Department of Chemistry and Biochemistry, University of Notre Dame Notre Dame IN 46556 USA
| | - Scott Franzblau
- Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago 833 South Wood Street Chicago Il 60612 USA
| | - Gauri Shetye
- Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago 833 South Wood Street Chicago Il 60612 USA
| | - Rui Ma
- Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago 833 South Wood Street Chicago Il 60612 USA
| | - Karin Savková
- Department of Biochemistry, Faculty of Natural Sciences, Comenius University in Bratislava Ilkovičova 6 84215 Bratislava Slovakia
| | - Katarína Mikušová
- Department of Biochemistry, Faculty of Natural Sciences, Comenius University in Bratislava Ilkovičova 6 84215 Bratislava Slovakia
| | - Bei Shi Lee
- School of Biological Sciences, Nanyang Technological University Singapore 637551
| | - Kevin Pethe
- School of Biological Sciences, Nanyang Technological University Singapore 637551
- Lee Kong Chian School of Medicine, Nanyang Technological University Singapore 636921
| | - Garrett C Moraski
- Department of Chemistry and Biochemistry, Montana State University Bozeman MT 59717 USA
| | - Marvin J Miller
- Department of Chemistry and Biochemistry, University of Notre Dame Notre Dame IN 46556 USA
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166
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Gan YL, Huang KR, Li YG, Qin DP, Zhang DM, Zong ZA, Cui LS. Synthesis, structure and fluorescent sensing for nitrobenzene of a Zn-based MOF. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129217] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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167
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Radha G, Leelasree T, Muthukumar D, Pillai RS, Aggarwal H. Highly selective detection of TNP over other nitro compounds in water: the role of selective host–guest interactions in Zr-NDI MOF. NEW J CHEM 2021. [DOI: 10.1039/d1nj02343h] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A fluorescent Zr-NDI based MOF shows the selective sensing of TNP in water, over other classes of nitro compounds. DFT studies reveal favourable host–guest interactions behind this phenomenon.
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Affiliation(s)
- Govu Radha
- Department of Chemistry
- Birla Institute of Technology and Science
- Hyderabad Campus
- Hyderabad 500078
- India
| | - T. Leelasree
- Department of Chemistry
- Birla Institute of Technology and Science
- Hyderabad Campus
- Hyderabad 500078
- India
| | - D. Muthukumar
- Department of Chemistry
- SRM Institute of Science and Technology
- SRM Nagar
- Kattankulathur-603 203
- Chennai
| | - Renjith S. Pillai
- Department of Chemistry
- SRM Institute of Science and Technology
- SRM Nagar
- Kattankulathur-603 203
- Chennai
| | - Himanshu Aggarwal
- Department of Chemistry
- Birla Institute of Technology and Science
- Hyderabad Campus
- Hyderabad 500078
- India
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168
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Xiao X, Ma XL, Wang LG, Long F, Li TT, Zhou XT, Liu H, Wu LJ, Yu HQ. Anaerobic reduction of high-polarity nitroaromatic compounds by electrochemically active bacteria: Roles of Mtr respiratory pathway, molecular polarity, mediator and membrane permeability. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 268:115943. [PMID: 33158624 DOI: 10.1016/j.envpol.2020.115943] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 10/22/2020] [Accepted: 10/26/2020] [Indexed: 06/11/2023]
Abstract
Electrochemically active bacteria (EAB) are effective for the bioreduction of nitroaromatic compounds (NACs), but the exact reduction mechanisms are unclear yet. Therefore, 3-nitrobenzenesulfonate (NBS) was used to explore the biodegradation mechanism of NACs by EAB. Results show that NBS could be anaerobically degraded by Shewanella oneidensis MR-1. The generation of aminoaromatic compounds was accompanied with the NBS reduction, indicating that NBS was biodegraded via reductive approach by S. oneidensis MR-1. The impacts of NBS concentration and cell density on the NBS reduction were evaluated. The removal of NBS depends mainly on the transmembrane electron transfer of S. oneidensis MR-1. Impairment of Mtr respiratory pathway was found to mitigate the reduction of NBS, suggesting that the anaerobic biodegradation of NBS occurred extracellularly. Knocking out cymA severely impaired the extracellular reduction ability of S. oneidensis MR-1. However, the phenotype of ΔcymA mutant could be compensated by the exogenous electron mediators, implying the trans-outer membrane diffusion of mediators into the periplasmic space. This work provides a new insight into the anaerobic reduction of aromatic contaminants by EAB.
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Affiliation(s)
- Xiang Xiao
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, China; School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Xiao-Lin Ma
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Lu-Guang Wang
- Department of Biological and Ecological Engineering, Oregon State University, Corvallis, OR, 97333, USA
| | - Fei Long
- Department of Biological and Ecological Engineering, Oregon State University, Corvallis, OR, 97333, USA
| | - Ting-Ting Li
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Xiang-Tong Zhou
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Hong Liu
- Department of Biological and Ecological Engineering, Oregon State University, Corvallis, OR, 97333, USA
| | - Li-Jun Wu
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, China
| | - Han-Qing Yu
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, China; CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei, 230026, China.
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169
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Jamshidi M, Amani A, Khazalpour S, Torabi S, Nematollahi D. Progress and perspectives of electrochemical insights for C–H and N–H sulfonylation. NEW J CHEM 2021. [DOI: 10.1039/d1nj03574f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A comprehensive electrosulfonylation study has been carried out via cathodic and anodic approaches for the production of organosulfone and sulfonamide derivatives.
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Affiliation(s)
- Mahdi Jamshidi
- Faculty of Chemistry, Bu-Ali-Sina University, Hamedan 65174, Iran
| | - Ameneh Amani
- Nahavand Higher Education Complex, Bu-Ali Sina University, Hamedan, Iran
| | | | - Sara Torabi
- Faculty of Chemistry, Bu-Ali-Sina University, Hamedan 65174, Iran
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170
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Zhao H, Zhang Q. Performance of electro-Fenton process coupling with microbial fuel cell for simultaneous removal of herbicide mesotrione. BIORESOURCE TECHNOLOGY 2021; 319:124244. [PMID: 33254467 DOI: 10.1016/j.biortech.2020.124244] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Revised: 10/05/2020] [Accepted: 10/07/2020] [Indexed: 06/12/2023]
Abstract
The aim of this work was to investigate the performance of electro-Fenton process coupling with microbial fuel cell for removal of herbicide mesotrione. After a six months acclimation, the anodic biofilm exhibited stable degradation ability to herbicide mesotrione, and the bioelectricity generated by the anodic biofilm could be utilized to in-situ generate H2O2 in cathode. Under the optimized conditions, the mesotrione removal rates reached 0.83 mg L-1h-1 for anodic microbial degradation and 1.39 mg L-1h-1 for cathodic Fenton oxidation, respectively. The bacteria possessing functions of compounds degradation (e.g. Petrimonas, Desulfovibrio, and Mycobacterium) and electrons transfer (e.g. Petrimonas, Cloacibacillus, and Azospirillum) were selectively enriched in anodic biofilm. Therefore, with the advantages of pollutant removal by simultaneous microbial degradation and Fenton oxidation, the MFC-Fenton offer a promising and sustainable approach for wastewater treatment and refractory contaminants elimination.
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Affiliation(s)
- Huanhuan Zhao
- College of Plant Protection, Hainan University, Haikou 570228, China; China Agricultural University, Beijing 100094, China
| | - Qinghua Zhang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
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171
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Nóbile ML, Stricker AM, Iribarren AM, Lewkowicz ES. Streptomyces griseus: A new biocatalyst with N-oxygenase activity. J Biotechnol 2020; 327:36-42. [PMID: 33373628 DOI: 10.1016/j.jbiotec.2020.12.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 12/10/2020] [Accepted: 12/11/2020] [Indexed: 12/21/2022]
Abstract
Aromatic nitro compounds are key building blocks for many industrial syntheses and are also components of explosives, drugs and pesticides. Due to the environmentally unfriendly experimental conditions involved in their chemical syntheses, industrial processes would benefit from the use of biocatalysts. Among potentially useful enzymes, N-oxygenases, whose role is to oxygenate primary amines, are becoming relevant. These enzymes are involved in different secondary metabolic pathways in Streptomyces and in few other bacteria, forming part of the enzyme pools implicated in antibiotic synthesis. In this work, a group of Streptomyces strains, whose biomass was obtained from simple and novel culture media, were identified as new sources of N-oxygenase activity. Furthermore, the use of unspecific metabolic stimulation strategies allowed substantial improvements in the activity of whole cells as biocatalysts. It is remarkable the 6 to 50-fold increase in nitro compound yields compared to the biotransformation under standard conditions when Streptomyces griseus was the biocatalyst. In addition, biocatalyst substrate acceptance was studied in order to determine the biocatalytic potential of this enzyme.
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Affiliation(s)
- Matías L Nóbile
- Universidad Nacional de Quilmes, CONICET, Departamento de Ciencia y Tecnología, LBB, Roque Sáenz Peña 352, Quilmes, 1876, Argentina.
| | - Abigail M Stricker
- Universidad Nacional de Quilmes, CONICET, Departamento de Ciencia y Tecnología, LBB, Roque Sáenz Peña 352, Quilmes, 1876, Argentina
| | - Adolfo M Iribarren
- Universidad Nacional de Quilmes, CONICET, Departamento de Ciencia y Tecnología, LBB, Roque Sáenz Peña 352, Quilmes, 1876, Argentina
| | - Elizabeth S Lewkowicz
- Universidad Nacional de Quilmes, CONICET, Departamento de Ciencia y Tecnología, LBB, Roque Sáenz Peña 352, Quilmes, 1876, Argentina
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172
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Chen J, Rosen BP. The Pseudomonas putida NfnB nitroreductase confers resistance to roxarsone. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 748:141339. [PMID: 32810805 PMCID: PMC7606800 DOI: 10.1016/j.scitotenv.2020.141339] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 07/07/2020] [Accepted: 07/27/2020] [Indexed: 05/04/2023]
Abstract
Roxarsone (3-nitro-4-hydroxyphenylarsonic acid, Rox) has been used for decades as an antimicrobial growth promoter for poultry and swine. Roxarsone is excreted in chicken manure unchanged and can be microbially transformed into a variety of arsenic-containing compounds such as 3-amino-4-hydroxyphenylarsonic acid (HAPA(V)) that contaminate the environment and present a potential health hazard. To cope with arsenic toxicity, nearly every prokaryote has an ars (arsenic resistance) operon, some of which confer resistance to roxarsone. Pseudomonas putida KT2440 is a robust environmental isolate capable of metabolizing many aromatic compounds and is used as a model organism for biodegradation of aromatic compounds. Here we report that P. putida KT2440 (ΔΔars) in which the two ars operons had been deleted retains resistance to highly toxic trivalent Rox(III), the likely active form of roxarsone. In this study, a genomic library constructed from P. putida KT2440 (ΔΔars) was used to screen for resistance to Rox(III) in Escherichia coli. One gene, termed, PpnfnB, was identified that encodes a putative 6,7-dihydropteridine reductase. Cells expressing PpnfnB reduce the nitro group of Rox(III), and purified NfnB catalyzes FMN-NADPH-dependent nitroreduction of Rox(III) to less toxic HAPA(III). This identifies a key step in the breakdown of synthetic aromatic arsenicals.
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Affiliation(s)
- Jian Chen
- Department of Cellular Biology and Pharmacology, Herbert Wertheim College of Medicine, Florida International University, Miami, FL 33199, United States; Research Center for Soil Contamination and Environmental Remediation, Southwest Forestry University, Kunming, Yunnan 650224, China
| | - Barry P Rosen
- Department of Cellular Biology and Pharmacology, Herbert Wertheim College of Medicine, Florida International University, Miami, FL 33199, United States.
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173
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Tiwari J, Gandhi D, Sivanesan S, Naoghare P, Bafana A. Remediation of different nitroaromatic pollutants by a promising agent of Cupriavidus sp. strain a3. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 205:111138. [PMID: 32836156 DOI: 10.1016/j.ecoenv.2020.111138] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 08/01/2020] [Accepted: 08/04/2020] [Indexed: 06/11/2023]
Abstract
Nitrobenzene, nitrotoluenes and nitrobenzoic acid are toxic and mutagenic. Their removal from the environment is necessary to avoid health and environmental damage. In this study, Cupriavidus strain a3 was found to utilize 2-nitrotoluene (2NT), 3-nitrotoluene (3NT), 4-nitrotoluene (4NT), nitrobenzene (NB) and 2-nitrobenzoic acid (2NBA) as carbon and nitrogen source, resulting in their detoxification. The metabolism involved reductive transformation of nitroaromatics to the corresponding amines followed by cleavage of amino group to release ammonia. Cell free extract showed nitroreductase activity in the range of 310-389 units/mg. NB was reduced to form benzamine and 4-aminophenol, 2NT was reduced to 2-aminotoluene, whereas 2NBA was reduced to form 2-aminobenzoic acid. Similarly, 3NT was metabolized to 3-aminotoluene and 2-amino-4-methylphenol, while 4NT was reduced to 4-nitrosotoluene and 4-aminotoluene. Cytotoxicity and apoptosis assays using Jurkat cell line, and Ames test were used to evaluate the detoxification of nitroaromatics during biodegradation. Biodegradation with Cupriavidus resulted in 2.6-11 fold increase in cell viability, 1.3-2.3 fold reduction in apoptosis, 1.6-55 fold reduction in caspase-3 activation, and complete disappearance of mutagenic activity. In soil microcosm, bioaugmentation with Cupriavidus resulted in 16-59% degradation of various nitroaromatics, as against <14% degradation without bioaugmentation. Thus, the present study reflects promising capability of Cupriavidus strain a3 in degradation and detoxification of multiple nitroaromatics.
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Affiliation(s)
- Jyoti Tiwari
- AcSIR (Academy of Scientific and Innovative Research), Ghaziabad, 201002, India; Director's Research Cell, CSIR-NEERI (National Environmental Engineering Research Institute), Nagpur, 440020, India
| | - Deepa Gandhi
- Biochemistry Division, CSIR-CDRI (Central Drug Research Institute), Lucknow, 226031, India
| | - Saravanadevi Sivanesan
- Health and Toxicity Cell, CSIR-NEERI (National Environmental Engineering Research Institute), Nagpur, 440020, India
| | - Pravin Naoghare
- Environmental Impact and Sustainability Division, CSIR-NEERI (National Environmental Engineering Research Institute), Nagpur, 440020, India
| | - Amit Bafana
- Director's Research Cell, CSIR-NEERI (National Environmental Engineering Research Institute), Nagpur, 440020, India.
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174
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Hickey KP, Di Toro DM, Allen HE, Carbonaro RF, Chiu PC. A Unified Linear Free Energy Relationship for Abiotic Reduction Rate of Nitroaromatics and Hydroquinones Using Quantum Chemically Estimated Energies. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2020; 39:2389-2395. [PMID: 32897583 DOI: 10.1002/etc.4867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 02/16/2020] [Accepted: 08/31/2020] [Indexed: 06/11/2023]
Abstract
Determining the fate of nitroaromatic compounds (NACs) in the environment requires the use of predictive models for compounds and conditions for which experimental data are insufficient. Previous studies have developed linear free energy relationships (LFERs) that relate the thermodynamic energy of NAC reduction to its corresponding rate constant. We present a comprehensive LFER that incorporates both the reduction and oxidation half-reactions through quantum chemically calculated energies. Environ Toxicol Chem 2020;39:2389-2395. © 2020 SETAC.
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Affiliation(s)
- Kevin P Hickey
- Department of Civil and Environmental Engineering, University of Delaware, Newark, Delaware, USA
| | - Dominic M Di Toro
- Department of Civil and Environmental Engineering, University of Delaware, Newark, Delaware, USA
| | - Herbert E Allen
- Department of Civil and Environmental Engineering, University of Delaware, Newark, Delaware, USA
| | - Richard F Carbonaro
- Department of Chemical Engineering, Manhattan College, Riverdale, New York, USA
| | - Pei C Chiu
- Department of Civil and Environmental Engineering, University of Delaware, Newark, Delaware, USA
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175
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Zhang Q, Hou B, Li Y, Zhang W, Liu J. DNA interactive and selective anticancer activity studies of copper(II) complexes decorated water‐soluble porphyrin. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.6094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Qian Zhang
- Key Laboratory of Eco‐functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco‐environmental Polymer Materials of Gansu Province, Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou 730070 People's Republic of China
| | - Bing‐jie Hou
- Key Laboratory of Eco‐functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco‐environmental Polymer Materials of Gansu Province, Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou 730070 People's Republic of China
| | - Yan‐yan Li
- Key Laboratory of Eco‐functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco‐environmental Polymer Materials of Gansu Province, Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou 730070 People's Republic of China
| | - Wen‐yuan Zhang
- Key Laboratory of Eco‐functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco‐environmental Polymer Materials of Gansu Province, Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou 730070 People's Republic of China
| | - Jia‐cheng Liu
- Key Laboratory of Eco‐functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco‐environmental Polymer Materials of Gansu Province, Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou 730070 People's Republic of China
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176
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All‐in‐One: Sensing, Adsorptive Removal, and Photocatalytic Degradation of Nitro‐Explosive Contaminants by Microporous Polycarbazole Polymer. Macromol Rapid Commun 2020; 42:e2000469. [DOI: 10.1002/marc.202000469] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 10/08/2020] [Indexed: 01/07/2023]
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177
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Zhan D, Saeed A, Li Z, Wang C, Yu Z, Wang J, Zhao N, Xu W, Liu J. Highly fluorescent scandium-tetracarboxylate frameworks: selective detection of nitro-aromatic compounds, sensing mechanism, and their application. Dalton Trans 2020; 49:17737-17744. [PMID: 33237063 DOI: 10.1039/d0dt03781h] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Recently, exploring new luminescent metal-organic frameworks (LMOFs) to selectively detect nitro-aromatic compounds (NACs) has been a hot topic of research. Simultaneously, it is still a challenging issue to understand the sensing mechanism of luminescent MOFs interacting with NACs at the molecular level. In this work, highly fluorescent Sc-tetracarboxylate frameworks (Sc-EBTC) have been successfully synthesized through a solvothermal method. The as-prepared Sc-EBTC crystals have good thermal stability, chemical stability as well as strong fluorescence (λex = 320 nm and λem = 400 nm), and they can detect various NACs rapidly (as short as 30 s), selectively and efficiently by the "turn-off" fluorescence mechanism. The detection limits of Sc-EBTC toward 2,4-DNP and 4-NP are quantified to be 5.71 ppb and 6.26 ppb, respectively. Furthermore, to better understand the sensing mechanism, we attempt to use solid-state NMR and X-ray photoelectron spectroscopy to vividly characterize the charge transfer caused by the interaction between NAC molecules and the MOF at the molecular level. Additionally, test strips were made successfully for the practical detection of the NACs. This study demonstrates that the MOF constructed from the H4EBTC ligands might be a promising candidate for the detection of trace NACs.
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Affiliation(s)
- Deyi Zhan
- State Key Laboratory of Sensor Technology, and Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, P. R. China.
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178
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Pramanik B, Das S, Das D. Aggregation-directed High Fidelity Sensing of Picric Acid by a Perylenediimide-based Luminogen. Chem Asian J 2020; 15:4291-4296. [PMID: 33137228 DOI: 10.1002/asia.202001184] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Indexed: 11/09/2022]
Abstract
Widespread use of picric acid (PA) in chemical industries and deadly explosives poses dreadful impact on all living creatures as well as the natural environment and has raised global concerns that necessitate the development of fast and efficient sensing platforms. To address this issue, herein, we report a perylenediimide-peptide conjugate, PDI-1, for detection of PA in methanol. The probe displays typical aggregation caused quenching (ACQ) behaviour and exhibits a fluorescence "turn-off" sensory response towards PA which is unaffected by the presence of other interfering nitroaromatic compounds. The sensing mechanism involves PA induced aggregation of the probe into higher order tape like structures which leads to quenching of emission. The probe possesses a low detection limit of 5.6 nM or 1.28 ppb and a significantly high Stern-Volmer constant of 6.87×104 M-1 . It also exhibits conducting properties in the presence of PA vapours and thus represents a prospective candidate for vapour phase detection of PA. This is, to the best of our knowledge, the first example of a perylenediimide based probe that demonstrates extremely specific, selective and sensitive detection of PA and thus grasps the potential for application in practical scenarios.
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Affiliation(s)
- Bapan Pramanik
- Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati, Kamrup, Assam, 781039, India.,Present address: Department of Chemistry, Ben-Gurion University of Negev, Beer Sheva, 84105, Israel
| | - Saurav Das
- Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati, Kamrup, Assam, 781039, India
| | - Debapratim Das
- Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati, Kamrup, Assam, 781039, India
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179
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Gao YZ, Palatucci ML, Waidner LA, Li T, Guo Y, Spain JC, Zhou NY. A Nag-like dioxygenase initiates 3,4-dichloronitrobenzene degradation via 4,5-dichlorocatechol in Diaphorobacter sp. strain JS3050. Environ Microbiol 2020; 23:1053-1065. [PMID: 33103811 DOI: 10.1111/1462-2920.15295] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 10/20/2020] [Accepted: 10/23/2020] [Indexed: 11/30/2022]
Abstract
The chemical synthesis intermediate 3,4-dichloronitrobenzene (3,4-DCNB) is an environmental pollutant. Diaphorobacter sp. strain JS3050 utilizes 3,4-DCNB as a sole source of carbon, nitrogen and energy. However, the molecular determinants of its catabolism are poorly understood. Here, the complete genome of strain JS3050 was sequenced and key genes were expressed heterologously to establish the details of its degradation pathway. A chromosome-encoded three-component nitroarene dioxygenase (DcnAaAbAcAd) converted 3,4-DCNB stoichiometrically to 4,5-dichlorocatechol, which was transformed to 3,4-dichloromuconate by a plasmid-borne ring-cleavage chlorocatechol 1,2-dioxygenase (DcnC). On the chromosome, there are also genes encoding enzymes (DcnDEF) responsible for the subsequent transformation of 3,4-dichloromuconate to β-ketoadipic acid. The fact that the genes responsible for the catabolic pathway are separately located on plasmid and chromosome indicates that recent assembly and ongoing evolution of the genes encoding the pathway is likely. The regiospecificity of 4,5-dichlorocatechol formation from 3,4-DCNB by DcnAaAbAcAd represents a sophisticated evolution of the nitroarene dioxygenase that avoids misrouting of toxic intermediates. The findings enhance the understanding of microbial catabolic diversity during adaptive evolution in response to xenobiotics released into the environment.
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Affiliation(s)
- Yi-Zhou Gao
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Mallory L Palatucci
- Center for Environmental Diagnostics and Bioremediation, University of West Florida, 11000 University Parkway, Pensacola, FL, 32514-5751, USA
| | - Lisa A Waidner
- Center for Environmental Diagnostics and Bioremediation, University of West Florida, 11000 University Parkway, Pensacola, FL, 32514-5751, USA
| | - Tao Li
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Yuan Guo
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Jim C Spain
- Center for Environmental Diagnostics and Bioremediation, University of West Florida, 11000 University Parkway, Pensacola, FL, 32514-5751, USA
| | - Ning-Yi Zhou
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
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180
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Uvyn A, De Geest BG. Multivalent Antibody-Recruiting Macromolecules: Linking Increased Binding Affinity with Enhanced Innate Immune Killing. Chembiochem 2020; 21:3036-3043. [PMID: 32497371 PMCID: PMC7116353 DOI: 10.1002/cbic.202000261] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 06/02/2020] [Indexed: 12/17/2022]
Abstract
Antibody-recruiting molecules (ARMs) are a novel class of immunotherapeutics. They are capable of introducing antibodies onto disease-relevant targets such as cancer cells, bacterial cells or viruses. This can induce antibody-mediated immune responses such as antibody-dependent cellular cytotoxicity (ADCC), complement-dependent cytotoxicity (CDC) and antibody-dependent phagocytosis (ADCP), which can kill the pathogen. In contrast to the classic ARMs, multivalent ARMs could offer the advantage of increasing the efficiency of antibody recruitment and subsequent innate immune killing. Such compounds consist of multiple target-binding termini (TBT) and/or antibody-binding termini (ABT). Those multivalent interactions are able to convert low binding affinities into increased binding avidities. This minireview summarizes the current status of multivalent ARMs and gives insight into possible benefits, hurdles still to be overcome and future perspectives.
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Affiliation(s)
- Annemiek Uvyn
- A. Uvyn, Prof. Dr. B. G. De Geest, Department of Pharmaceutics, Ghent University, Ottergemsesteenweg 460, Ghent, Belgium
| | - Bruno G. De Geest
- A. Uvyn, Prof. Dr. B. G. De Geest, Department of Pharmaceutics, Ghent University, Ottergemsesteenweg 460, Ghent, Belgium
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181
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Wei C, Yin S, Zhu D. Mechanisms for sulfide-induced nitrobenzene reduction mediated by a variety of different carbonaceous materials: Graphitized carbon-facilitated electron transfer versus quinone-facilitated formation of reactive sulfur species. JOURNAL OF ENVIRONMENTAL QUALITY 2020; 49:1564-1574. [PMID: 33111365 DOI: 10.1002/jeq2.20146] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Revised: 07/30/2020] [Accepted: 08/19/2020] [Indexed: 06/11/2023]
Abstract
Although it has long been known that carbonaceous materials (CMs) can facilitate the reduction of organic contaminants by sulfide, the underlying mechanisms and controlling factors, particularly the surface property dependence, are not well understood. Here, sulfide-induced nitrobenzene reduction was explored as a model reaction to compare the mediation efficiency of a variety of CMs, including rice straw-derived black carbon (R-BC) and pine wood-derived black carbon (P-BC), a commercial activated carbon (AC), multi-walled carbon nanotube (MCNT), and graphite. Given the same load (250 mg L-1 ), the observed pseudo-first-order rate constant (kobs ) of nitrobenzene reduction was ordered as AC > R-BC > MCNT > P-BC > graphite. The surface area-normalized rate constant (kSN ) was ordered as R-BC > graphite > MCNT > AC > P-BC. Neither the kobs nor the kSN followed the order of mediator's electron conductivity (graphite > MCNT > AC > P-BC > R-BC). For the low-graphitized R-BC and P-BC, increasing surface oxygen content by HNO3 oxidation enhanced nitrobenzene reduction, whereas decreasing the content by NaBH4 reduction impeded the reaction. Opposite trends were observed with the high-graphitized AC, MCNT, and graphite. The quinone moieties of low-graphitized CMs were found to facilitate nitrobenzene reduction by serving as one-electron acceptors to generate reactive reducing sulfur species (polysulfides and polysulfide free radicals) from sulfide. In contrast, the surface oxygen groups of high-graphitized CMs suppressed the reaction by lowering the electron conductivity. These results demonstrate that the types of CMs and their surface chemistry properties are key determinants in mediating redox transformation of organic contaminants.
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Affiliation(s)
- Chenhui Wei
- School of Urban and Environmental Sciences, Key Lab. of the Ministry of Education for Earth Surface Processes, Peking Univ., Beijing, 100871, China
| | - Shujun Yin
- School of Urban and Environmental Sciences, Key Lab. of the Ministry of Education for Earth Surface Processes, Peking Univ., Beijing, 100871, China
| | - Dongqiang Zhu
- School of Urban and Environmental Sciences, Key Lab. of the Ministry of Education for Earth Surface Processes, Peking Univ., Beijing, 100871, China
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182
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Murphy M, Manoj D, Saravanakumar D, Thenmozhi K, Senthilkumar S. Water insoluble, self-binding viologen functionalized ionic liquid for simultaneous electrochemical detection of nitrophenol isomers. Anal Chim Acta 2020; 1138:89-98. [DOI: 10.1016/j.aca.2020.09.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 08/19/2020] [Accepted: 09/08/2020] [Indexed: 12/16/2022]
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183
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Aboelnaga A, Amer N, Zakaria N. Polyaniline/Aza-Bicyclo Composites Containing P, S, and Si Atoms: Synthesis, Characterization, Molecular Orbital Calculations, Electrical Conductivity, and Biocidal Activities against Some Biofouling-Causing Organisms. Polycycl Aromat Compd 2020. [DOI: 10.1080/10406638.2020.1833053] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Asmaa Aboelnaga
- Faculty of Women for Arts, Science and Education, Chemistry Department, Ain Shams University, Cairo, Egypt
| | - Nesreen Amer
- Petroleum Biotechnology Lab, Processes Design and Development Department, Egyptian Petroleum Research Institute (EPRI), Cairo, Egypt
| | - Nada Zakaria
- Faculty of Women for Arts, Science and Education, Chemistry Department, Ain Shams University, Cairo, Egypt
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184
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Chen MC, Chen DG, Chou PT. Fluorescent Chromophores Containing the Nitro Group: Relatively Unexplored Emissive Properties. Chempluschem 2020; 86:11-27. [PMID: 33094565 DOI: 10.1002/cplu.202000592] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 10/05/2020] [Indexed: 12/13/2022]
Abstract
Apart from numerous applications, for example in azo dye precursors, explosives, and industrial processes, the nitro group (-NO2 ) appears on countless molecules in photochemical research owing to its unique characteristics such as a strong electron-withdrawing ability and facile conversion to the reduced substituent. Although it is well known as a fluorescence quencher, fluorescent chromophores that contain the nitro group have also emerged, with 3-nitrophenothiazine being recently reported to have 100 % emission quantum yield in nonpolar solvents. The diverse characters of nitro-containing chromophores motivated us to systematically review those chromophores with nitro substituents, their associated photophysical properties, and applications. In this Review, we succinctly elaborate the advance of the fluorescent nitro chromophores in fields of intramolecular charge transfer, fluorescent probes and nonlinear properties. Special attention is paid to the rationalization of the associated emission spectroscopy, so that the readers can gain insights into the structure-photophysics relationship and hence gain insights for the strategic design of nitro chromophores.
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Affiliation(s)
- Meng-Chi Chen
- Department of Chemistry, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei, 10617, Taiwan
| | - Deng-Gao Chen
- Department of Chemistry, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei, 10617, Taiwan
| | - Pi-Tai Chou
- Department of Chemistry, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei, 10617, Taiwan
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185
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Liu Y, Zheng X, Yin S, Wei C, Zhu D. A significant correlation between kinetics of nitrobenzene reduction by sulfide and electron transfer capacity of mediating dissolved humic substances. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 740:139911. [PMID: 32927563 DOI: 10.1016/j.scitotenv.2020.139911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 05/27/2020] [Accepted: 06/01/2020] [Indexed: 06/11/2023]
Abstract
Dissolved humic substances (DHS) are ubiquitous in surface and subsurface aquatic environments and greatly affect the redox transformation of organic contaminants as reactants and/or electron transfer mediators. However, little is known about the quantitative relationship between the mediation efficiency of DHS and the physicochemical properties of DHS. Using sulfide-induced nitrobenzene reduction as a model system, we measured the reduction rate of nitrobenzene in the presence of 12 different DHS (20 mgC·L-1), including 4 commercial humic substances (Suwannee River humic and fulvic acids and Pahokee Peat humic and fulvic acids) and 8 soil humic substances collected as leachates from a wide variety of soils. In addition to the UV-vis absorption and fluorescence spectra, the electron donating/accepting capacities (EDC/EAC) of the tested DHS were measured using an electrochemical approach. A significant linear correlation (r = 0.99, P < .0001) was observed between the observed pseudo-first-order rate constant (kobs) of nitrobenzene reduction and the sum of EDC and EAC which is defined as electron transfer capacity (ETC) of DHS. A relatively good positive correlation (r = 0.69, P < .2) was shown between the kobs and the specific UV-absorbance at 254 nm (SUVA254), whereas no good correlation was shown between the kobs and the fluorescence of the C1-C4 components identified by the excitation emission matrices and parallel factor (EEM-PARAFAC) analysis. This study provides a new framework for accurate prediction of the capability of DHS in mediating the redox transformation of organic contaminants. CAPSULE: A significant linear correlation exists between the kinetics of nitrobenzene reduction by sulfide and electron transfer capacity of mediating dissolved humic substances.
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Affiliation(s)
- Yafang Liu
- School of Urban and Environmental Sciences, Key Laboratory of the Ministry of Education for Earth Surface Processes, Peking University, Beijing 100871, China
| | - Xiaojian Zheng
- School of Urban and Environmental Sciences, Key Laboratory of the Ministry of Education for Earth Surface Processes, Peking University, Beijing 100871, China
| | - Shujun Yin
- School of Urban and Environmental Sciences, Key Laboratory of the Ministry of Education for Earth Surface Processes, Peking University, Beijing 100871, China
| | - Chenhui Wei
- School of Urban and Environmental Sciences, Key Laboratory of the Ministry of Education for Earth Surface Processes, Peking University, Beijing 100871, China
| | - Dongqiang Zhu
- School of Urban and Environmental Sciences, Key Laboratory of the Ministry of Education for Earth Surface Processes, Peking University, Beijing 100871, China.
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186
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Rocha RP, Pereira MFR, Figueiredo JL. Metal-free carbon materials as catalysts for wet air oxidation. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.04.047] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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187
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Synthesis and biological evaluation of 2,4,6-trinitroaniline derivatives as potent antitumor agents. MONATSHEFTE FUR CHEMIE 2020. [DOI: 10.1007/s00706-020-02690-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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188
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Yin S, Wei C, Zhu D. Surface quinone-induced formation of aqueous reactive sulfur species controls pine wood biochar-mediated reductive dechlorination of hexachloroethane by sulfide. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2020; 22:1898-1907. [PMID: 32856031 DOI: 10.1039/d0em00307g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Understanding the mechanisms controlling the redox transformation of organic contaminants mediated by biochar is of great significance for application of biochar in remediation of contaminated soils and sediments. Here we investigated the mediation effect of a pine wood-derived biochar (P-char) in comparison with multiwalled carbon nanotubes (MCNTs) and graphite on the reductive dechlorination of hexachloroethane by sulfide. Upon normalization of the mediator's surface area, the reduction rate of hexachloroethane follows an order of P-char < MCNTs < graphite. Aqueous polysulfides and polysulfide free radicals were readily produced by reacting sulfide only with P-char, and the supernatant separated from the reaction system could account for 83.4% of the pseudo-kinetic rate constant of hexachloroethane mediated by P-char. In contrast, MCNTs and graphite had weak abilities to produce reactive sulfur species, and the supernatant exhibited very low reduction capability (<20.7%) of hexachloroethane. Electron paramagnetic resonance (EPR) analysis demonstrated that the surface quinone moieties on P-char induced the formation of polysulfides and polysulfide free radicals from sulfide by serving as one-electron acceptors. Consistently, polysulfides prepared by reacting elemental sulfur with sulfide showed much stronger reducing capability compared to sulfide. Thus, the mediation effect of P-char was dominantly attributed to the surface quinone-induced formation of reactive reducing sulfur species, whereas the mediation effect of MCNTs and graphite mainly stemmed from the enhanced electron transfer by the graphitized carbon. These results showed for the first time that surface quinone-induced formation of aqueous reactive sulfur species could control biochar-mediated reductive dechlorination of chloroorganic contaminants by sulfides.
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Affiliation(s)
- Shujun Yin
- School of Urban and Environmental Sciences, Key Laboratory of the Ministry of Education for Earth Surface Processes, Peking University, Beijing 100871, China.
| | - Chenhui Wei
- School of Urban and Environmental Sciences, Key Laboratory of the Ministry of Education for Earth Surface Processes, Peking University, Beijing 100871, China.
| | - Dongqiang Zhu
- School of Urban and Environmental Sciences, Key Laboratory of the Ministry of Education for Earth Surface Processes, Peking University, Beijing 100871, China.
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189
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Pratibha, Rajput JK. Autocombustion‐Promoted Synthesis of Lanthanum Iron Oxide: Application as Heterogeneous Catalyst for Synthesis of Piperidines, Substituted Amines and Light‐Assisted Degradations. ChemistrySelect 2020. [DOI: 10.1002/slct.202002656] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Pratibha
- Department of Chemistry Dr. B.R Ambedkar National Institute of Technology Jalandhar Punjab 144011 India
| | - Jaspreet K. Rajput
- Department of Chemistry Dr. B.R Ambedkar National Institute of Technology Jalandhar Punjab 144011 India
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190
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Shamsa K, Rajaitha PSM, Vinoth S, Murugan C, Rameshkumar P, Pandikumar A. In situ formed zinc oxide/graphitic carbon nitride nanohybrid for the electrochemical determination of 4-nitrophenol. Mikrochim Acta 2020; 187:552. [PMID: 32897435 DOI: 10.1007/s00604-020-04525-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Accepted: 08/19/2020] [Indexed: 12/20/2022]
Abstract
The electrochemical determination of 4-nitrophenol using a nanohybrid consisting of glassy carbon (GC) and zinc oxide/graphitic carbon nitride (ZnO/g-CN nanosheet), is described. The ZnO/g-CN nanohybrid was in situ synthesized by chemical method and well characterized using absorption spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy and transmission electron microscopic analysis. It was observed that the nanosized ZnO particles were present inside the sheet-like g-CN nanostructure. The nanohybrid-modified electrode showed an enhanced electrocatalytic response for 4-nitrophenol reduction compared with the bare GC electrode. The assay exhibited linear ranges of 13.4-100 μM and 100-1000 μM for 4-NP determination. The limit of detection and limit of quantification were 4.0 and 13.4 μM, respectively, at the working potential of - 0.85 V. An appreciable precision was found towards the stability of the assay in the determination. It provides selectivity against inorganic and organic substances such as calcium chloride, potassium chloride, nitrobenzene, uric acid, 1-chloro,2,4-dinitrobenzene, 1-bromo,2-nitrobenzene and 1-iodo,2-nitrobenzene. The practical applicability of the assay was also checked in the analysis of real water samples and satisfactory recovery of 4-NP was found. Schematic representation of the synthesis of zinc oxide (ZnO) nanostructures incorporated graphitic carbon nitride nanosheets (g-C3N4 NSs) and its application in the voltammetric determination of 4-nitrophenol (4-NP) is presented. The nanohybrid assay showed selectivity among coexisting compounds and good recovery in real sample analysis.
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Affiliation(s)
- Kizhepat Shamsa
- Electro Organic and Materials Electrochemistry (EME) Division, CSIR-Central Electrochemical Research Institute, Karaikudi, Tamil Nadu, 630 003, India
| | - Peter Selvaraj Mary Rajaitha
- Electro Organic and Materials Electrochemistry (EME) Division, CSIR-Central Electrochemical Research Institute, Karaikudi, Tamil Nadu, 630 003, India
| | - Selvaraj Vinoth
- Electro Organic and Materials Electrochemistry (EME) Division, CSIR-Central Electrochemical Research Institute, Karaikudi, Tamil Nadu, 630 003, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Chinnan Murugan
- Electro Organic and Materials Electrochemistry (EME) Division, CSIR-Central Electrochemical Research Institute, Karaikudi, Tamil Nadu, 630 003, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Perumal Rameshkumar
- Department of Chemistry, School of Advanced Sciences, Kalasalingam Academy of Research and Education, Krishnankoil, Tamil Nadu, 626 126, India.
| | - Alagarsamy Pandikumar
- Electro Organic and Materials Electrochemistry (EME) Division, CSIR-Central Electrochemical Research Institute, Karaikudi, Tamil Nadu, 630 003, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
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191
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Coleman NV, Rich DJ, Tang FHM, Vervoort RW, Maggi F. Biodegradation and Abiotic Degradation of Trifluralin: A Commonly Used Herbicide with a Poorly Understood Environmental Fate. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:10399-10410. [PMID: 32786599 DOI: 10.1021/acs.est.0c02070] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Trifluralin is a widely used dinitroaniline herbicide, which can persist in the environment and has substantial ecotoxicity, especially to aquatic organisms. Trifluralin is very insoluble in water (0.22 mg/L at 20 °C) and highly volatile (vapor pressure of 6.7 mPa at 20 °C); these physicochemical properties determine a large part of its environmental fate, which includes rapid loss from soils if surface-applied, strong binding to soil organic matter, and negligible leaching into water. The trifluralin structure contains a tertiary amino group, two nitro-groups and a trifluoromethyl- group. Despite the strongly xenobiotic character of some of these substituents, biodegradation of trifluralin does occur, and pure cultures of bacteria and fungi capable of partially degrading the molecule either by dealkylation or nitro-group reduction have been identified. There are many unanswered questions about the environmental fate and metabolism of this herbicide; the genes and enzymes responsible for biodegradation are largely unknown, the relative roles of abiotic processes vs growth-linked biodegradation vs cometabolism are unresolved, and the impact of different environmental factors on the rates and extents of biodegradation are not clear. Here, we summarize the relevant literature on the persistence and environmental fate of trifluralin with a focus on biodegradation pathways and mechanisms, and we identify the current major knowledge gaps for future research.
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Affiliation(s)
- Nicholas V Coleman
- School of Life and Environmental Sciences, Building F22, University of Sydney, Sydney, New South Wales, Australia, 2006
| | - Deborah J Rich
- School of Life and Environmental Sciences, Building F22, University of Sydney, Sydney, New South Wales, Australia, 2006
| | - Fiona H M Tang
- Laboratory for Advanced Environmental Engineering Research, School of Civil Engineering, Building J05, University of Sydney, Sydney, New South Wales, Australia, 2006
| | - R Willem Vervoort
- School of Life and Environmental Sciences, Building C81, University of Sydney, Sydney, New South Wales, Australia 2006
| | - Federico Maggi
- Laboratory for Advanced Environmental Engineering Research, School of Civil Engineering, Building J05, University of Sydney, Sydney, New South Wales, Australia, 2006
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192
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Mashentseva AA, Barsbay M, Zdorovets MV, Zheltov DA, Güven O. Cu/CuO Composite Track-Etched Membranes for Catalytic Decomposition of Nitrophenols and Removal of As(III). NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E1552. [PMID: 32784726 PMCID: PMC7466412 DOI: 10.3390/nano10081552] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 08/01/2020] [Accepted: 08/05/2020] [Indexed: 11/17/2022]
Abstract
One of the promising applications of nanomaterials is to use them as catalysts and sorbents to remove toxic pollutants such as nitroaromatic compounds and heavy metal ions for environmental protection. This work reports the synthesis of Cu/CuO-deposited composite track-etched membranes through low-temperature annealing and their application in catalysis and sorption. The synthesized Cu/CuO/poly(ethylene terephthalate) (PET) composites presented efficient catalytic activity with high conversion yield in the reduction of nitro aryl compounds to their corresponding amino derivatives. It has been found that increasing the time of annealing raises the ratio of the copper(II) oxide (CuO) tenorite phase in the structure, which leads to a significant increase in the catalytic activity of the composites. The samples presented maximum catalytic activity after 5 h of annealing, where the ratio of CuO phase and the degree of crystallinity were 64.3% and 62.7%, respectively. The catalytic activity of pristine and annealed composites was tested in the reduction of 4-nitroaniline and was shown to remain practically unchanged for five consecutive test cycles. Composites annealed at 140 °C were also tested for their capacity to absorb arsenic(III) ions in cross-flow mode. It was observed that the sorption capacity of composite membranes increased by 48.7% compared to the pristine sample and reached its maximum after 10 h of annealing, then gradually decreased by 24% with further annealing.
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Affiliation(s)
- Anastassiya A. Mashentseva
- The Institute of Nuclear Physics of the Republic of Kazakhstan, Ibragimov str., 1, Almaty 050032, Kazakhstan; (M.V.Z.); (D.A.Z.)
- Engineering Profile Laboratory, L.N. Gumilyov Eurasian National University, Satpaev str., 5, Nur-Sultan 010008, Kazakhstan
| | - Murat Barsbay
- Department of Chemistry, Hacettepe University, 06800 Ankara, Turkey; (M.B.); (O.G.)
| | - Maxim V. Zdorovets
- The Institute of Nuclear Physics of the Republic of Kazakhstan, Ibragimov str., 1, Almaty 050032, Kazakhstan; (M.V.Z.); (D.A.Z.)
- Engineering Profile Laboratory, L.N. Gumilyov Eurasian National University, Satpaev str., 5, Nur-Sultan 010008, Kazakhstan
- Department of Intelligent Information Technologies, Ural Federal University Named after the First President of Russia B. N. Yeltsin, Mira str. 19, 620002 Yekaterinburg, Russia
| | - Dmitriy A. Zheltov
- The Institute of Nuclear Physics of the Republic of Kazakhstan, Ibragimov str., 1, Almaty 050032, Kazakhstan; (M.V.Z.); (D.A.Z.)
| | - Olgun Güven
- Department of Chemistry, Hacettepe University, 06800 Ankara, Turkey; (M.B.); (O.G.)
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193
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Lee HJ, Jana J, Chung JS, Hur SH. Uncovering the actual inner-filter effect between highly efficient carbon dots and nitroaromatics. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 236:118342. [PMID: 32305836 DOI: 10.1016/j.saa.2020.118342] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 03/31/2020] [Accepted: 04/03/2020] [Indexed: 06/11/2023]
Abstract
High performance sensors can be produced by adequately designing the chemical structure and uncovering the actual detection mechanism. In this study, a fluorescent probe was synthesized for various nitroaromatic molecules, including stereochemically varied nitrophenols and nitroaniline. A systematic investigation of the influence of various analytes on the luminescence behavior of the as-synthesized carbon dot (CDs) revealed the inner-filter effect to be the major detection mechanism. The extinction coefficient and spectral overlap were found to be the critical parameters for high sensitivity and good selectivity rather than the functional groups of the CDs and analytes.
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Affiliation(s)
- Hye Jin Lee
- School of Chemical Engineering and Bioengineering, University of Ulsan, Daehak-ro 93, Nam-gu, Ulsan 44610, South Korea
| | - Jayasmita Jana
- School of Chemical Engineering and Bioengineering, University of Ulsan, Daehak-ro 93, Nam-gu, Ulsan 44610, South Korea
| | - Jin Suk Chung
- School of Chemical Engineering and Bioengineering, University of Ulsan, Daehak-ro 93, Nam-gu, Ulsan 44610, South Korea
| | - Seung Hyun Hur
- School of Chemical Engineering and Bioengineering, University of Ulsan, Daehak-ro 93, Nam-gu, Ulsan 44610, South Korea.
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194
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Shultz LR, Hu L, Feng X, Jurca T. Using a Nitrophenol Cocktail Screen to Improve Catalyst Down-selection. Chemphyschem 2020; 21:1627-1631. [PMID: 32529796 DOI: 10.1002/cphc.202000400] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 06/09/2020] [Indexed: 11/05/2022]
Abstract
The catalytic reduction of 4-nitrophenol (4NP) with excess NaBH4 is the benchmark model for quantifying catalytic activity of nanoparticles. Although broadly useful, the reaction can be very selective. This can lead to false positives and negatives when utilized for catalyst down-selection from a broader materials candidate pool. We report a multi-nitrophenol cocktail screening methodology incorporating 4NP and other amino-nitrophenols, utilizing Ag, Au, Pt, and Pd nanoparticles on carbon support. The reduction of the cocktail proceeds with no deleterious side reactions on the time-scale tested. The resulting kinetic rates provide an improved correlation of relative catalyst activity when compared to performance with other reducible moieties (e. g. azo bonds), or when compared to solely 4NP screening.
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Affiliation(s)
- Lorianne R Shultz
- Department of Chemistry, University of Central Florida, Orlando, Florida, 32816, USA.,Renewable Energy and Chemical Transformations Cluster, University of Central Florida, Orlando, Florida, 32816, USA
| | - Lin Hu
- Renewable Energy and Chemical Transformations Cluster, University of Central Florida, Orlando, Florida, 32816, USA.,Department of Materials Science and Engineering, University of Central Florida, Orlando, Florida, 32816, USA
| | - Xiaofeng Feng
- Renewable Energy and Chemical Transformations Cluster, University of Central Florida, Orlando, Florida, 32816, USA.,Department of Physics, University of Central Florida, Orlando, Florida, 32816, USA
| | - Titel Jurca
- Department of Chemistry, University of Central Florida, Orlando, Florida, 32816, USA.,Renewable Energy and Chemical Transformations Cluster, University of Central Florida, Orlando, Florida, 32816, USA.,NanoScience Technology Center, University of Central Florida, Orlando, Florida, 32826, USA
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195
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Reddy Depa M, Potla S, Narkhede UC, Jadhav VD, Vidavalur S. Copper-mediated regioselective efficient direct ortho-nitration of anilide derivatives. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152223] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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196
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Kayıhan DS, Kayıhan C, Özden Çiftçi Y. Transgenic tobacco plants overexpressing a cold-adaptive nitroreductase gene exhibited enhanced 2,4-dinitrotoluene detoxification rate at low temperature. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2020; 23:1-9. [PMID: 32643388 DOI: 10.1080/15226514.2020.1786795] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Plants encounter many environmental factors such as low and high temperatures during phytoremediation processes. In this study, our aim was to produce the transgenic tobacco plants by using a newly characterized bacterial nitroreductase, Ntr, which was active at a broad range temperature in order to detoxify 2,4-dinitrotoluene (2,4-DNT) at lower temperature. The presence of Ntr and its heterologous expression was verified in T1 transgenic plants and their growing ability were determined under toxic amount of 2,4-DNT (35 µM). Fresh weight and dry weight of transgenic plants were significantly higher than wild type (WT) under toxic 2,4-DNT at 22 °C, indicating higher growth capacity of the transgenics. Transgenic plants also showed a higher tolerance than WT when exposed to 2,4-DNT at 15 °C. Moreover, transformation rate of 2,4-DNT was gradually decreased through decreasing temperatures in WT media, however, it was increased through decreasing temperatures in transgenic plant TR3-25 media and it had the highest transformation rate (54%) of 2,4-DNT at 4 °C. Correlatively, 2,4-DNT treatment at 4 °C led to a significant decrease in H2O2 level in transgenic plants. Thus, transgenic plants overexpressing nitroreductase might have an important advantage for phytoremediation of toxic nitroaromatic compounds in field applications at low temperatures.
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Affiliation(s)
- Doğa Selin Kayıhan
- Department of Molecular Biology and Genetics, Gebze Technical University, Kocaeli, Turkey
| | - Ceyhun Kayıhan
- Department of Molecular Biology and Genetics, Başkent University, Ankara, Turkey
| | - Yelda Özden Çiftçi
- Department of Molecular Biology and Genetics, Gebze Technical University, Kocaeli, Turkey
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197
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Wang Y, Shan J, Zhao Y, Li F, Corvini PFX, Ji R. Degradation and transformation of nitrated nonylphenol isomers in activated sludge under nitrifying and heterotrophic conditions. JOURNAL OF HAZARDOUS MATERIALS 2020; 393:122438. [PMID: 32151935 DOI: 10.1016/j.jhazmat.2020.122438] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Revised: 02/08/2020] [Accepted: 02/29/2020] [Indexed: 06/10/2023]
Abstract
Nitrated nonylphenols (2-nitro-nonylphenols, NNPs) are metabolites of the endocrine-disrupter nonylphenols (NPs). While they have been detected in the environment, their fate in activated sludge has yet to be determined. In this study, we used synthesized NNP isomers and a 14C-tracer technique to study the degradation and transformation of four NNP isomers (NNP111, NNP112, NNP38, and NNP65) in nitrifying activated sludge (NAS) and heterotrophic bacteria-enhanced activated sludge (HAS). Our results showed that the degradation of NNPs in both NAS and HAS was isomer-specific. The half-lives of the NNPs decreased in the order: NNP111 > NNP112 > NNP38 > NNP65. After 36 days of incubation, 9.48 % and 4.01 % of the 14C-NNP111 was mineralized in NAS and HAS, respectively. In addition to mineralization, five metabolites of NNPs containing hydroxyl, carbonyl, and carboxyl substituents on the alkyl chains were formed in NAS but not in HAS. The transformation of NNPs differed in NAS and HAS, mainly due to the differences in their microbial communities and the activities thereof in NAS and HAS. This is the first study of the isomer-specific fate of NNP isomers in activated sludge. Future studies should assess the toxicity, stability and potential risks of NNP metabolites in the environment.
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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; Quanzhou Institute for Environment Protection Industry, Nanjing University, Beifeng Road, 362000, Quanzhou, China
| | - Jun Shan
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, 210008, Nanjing, China; Changshu National Agro-Ecosystem Observation and Research Station, Institute of Soil Science, Chinese Academy of Sciences, 210008, Nanjing, China.
| | - Yingying Zhao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, 210023, Nanjing, China
| | - Fangjie Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, 210023, Nanjing, China
| | - Philippe F-X Corvini
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, 210023, Nanjing, China; Institute for Ecopreneurship, School of Life Sciences, University of Applied Sciences and Arts Northwestern Switzerland, 4132, Muttenz, Switzerland
| | - Rong Ji
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, 210023, Nanjing, China; Quanzhou Institute for Environment Protection Industry, Nanjing University, Beifeng Road, 362000, Quanzhou, China.
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198
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Fedeson DT, Saake P, Calero P, Nikel PI, Ducat DC. Biotransformation of 2,4-dinitrotoluene in a phototrophic co-culture of engineered Synechococcus elongatus and Pseudomonas putida. Microb Biotechnol 2020; 13:997-1011. [PMID: 32064751 PMCID: PMC7264894 DOI: 10.1111/1751-7915.13544] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 01/27/2020] [Accepted: 01/28/2020] [Indexed: 12/28/2022] Open
Abstract
In contrast to the current paradigm of using microbial mono-cultures in most biotechnological applications, increasing efforts are being directed towards engineering mixed-species consortia to perform functions that are difficult to programme into individual strains. In this work, we developed a synthetic microbial consortium composed of two genetically engineered microbes, a cyanobacterium (Synechococcus elongatus PCC 7942) and a heterotrophic bacterium (Pseudomonas putida EM173). These microbial species specialize in the co-culture: cyanobacteria fix CO2 through photosynthetic metabolism and secrete sufficient carbohydrates to support the growth and active metabolism of P. putida, which has been engineered to consume sucrose and to degrade the environmental pollutant 2,4-dinitrotoluene (2,4-DNT). By encapsulating S. elongatus within a barium-alginate hydrogel, cyanobacterial cells were protected from the toxic effects of 2,4-DNT, enhancing the performance of the co-culture. The synthetic consortium was able to convert 2,4-DNT with light and CO2 as key inputs, and its catalytic performance was stable over time. Furthermore, cycling this synthetic consortium through low nitrogen medium promoted the sucrose-dependent accumulation of polyhydroxyalkanoate, an added-value biopolymer, in the engineered P. putida strain. Altogether, the synthetic consortium displayed the capacity to remediate the industrial pollutant 2,4-DNT while simultaneously synthesizing biopolymers using light and CO2 as the primary inputs.
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Affiliation(s)
- Derek T. Fedeson
- DOE‐MSU Plant Research LaboratoriesMichigan State UniversityEast LansingMIUSA
- Genetics ProgramMichigan State UniversityEast LansingMIUSA
| | - Pia Saake
- Heinrich‐Heine UniversitätDüsseldorfGermany
| | - Patricia Calero
- The Novo Nordisk Foundation Center for BiosustainabilityTechnical University of DenmarkKgs LyngbyDenmark
| | - Pablo Iván Nikel
- The Novo Nordisk Foundation Center for BiosustainabilityTechnical University of DenmarkKgs LyngbyDenmark
| | - Daniel C. Ducat
- DOE‐MSU Plant Research LaboratoriesMichigan State UniversityEast LansingMIUSA
- Genetics ProgramMichigan State UniversityEast LansingMIUSA
- Department of Biochemistry and Molecular BiologyMichigan State UniversityEast LansingMIUSA
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199
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Intermediate formation enabled regioselective access to amide in the Pd-catalyzed reductive aminocarbonylation of olefin with nitroarene. CHINESE JOURNAL OF CATALYSIS 2020. [DOI: 10.1016/s1872-2067(20)63561-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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200
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Liu G, Dong B, Zhou J, Li J, Jin R, Wang J. Facilitated bioreduction of nitrobenzene by lignite acting as low-cost and efficient electron shuttle. CHEMOSPHERE 2020; 248:125978. [PMID: 31995734 DOI: 10.1016/j.chemosphere.2020.125978] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 10/26/2019] [Accepted: 01/19/2020] [Indexed: 06/10/2023]
Abstract
The searching for efficient and economical redox mediators to promote the treatment of wastewater containing recalcitrant organic compounds is greatly needed. In this study, the redox mediator activities of four different lignite samples to facilitate the bioreduction of nitrobenzene by Shewanella oneidensis MR-1 were tested for the first time. The initial nitrobenzene reduction rate was increased by 40.4%-90.3% in the presence of 50 mg/L of different lignite samples. Lignite collected from Xinjiang (XJL) having more oxygenated groups performed better in enhancing nitrobenzene bioreduction. The stimulating effects increased with the increase of lignite dosage (0-200 mg/L) and the decrease of lignite particle size (150-0.1 μm). However, the pristine XJL samples with assorted sizes of particles exhibited better stimulating effects than size-fractionated ones, implying that different-sized XJL particles might have synergetic effects on the bioreduction process. When humic acid or iron was removed from XJL, its promoting effects were decreased, demonstrating the crucial roles of both components in lignite-enhanced nitrobenzene bioreduction. Nitric acid treatment could form more oxygenated moieties on lignite surface, which played vital roles in promoting nitrobenzene bioreduction. The initial nitrobenzene bioreduction rate in the presence of HNO3-treated XJL was 80.8% higher than that obtained with pristine XJL. This study proposed an effective and readily available redox mediator that could be applied to promote the bioreduction of recalcitrant electrophilic pollutants.
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Affiliation(s)
- Guangfei Liu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China
| | - Bin Dong
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China
| | - Jiti Zhou
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China.
| | - Juanjuan Li
- Shanxi Academy for Environmental Planning, Taiyuan 030002, PR China
| | - Ruofei Jin
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China
| | - Jing Wang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China
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