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Yang Y, Jiang W, Wang Y, Wu C, Chen H, Lyu G, Ma J, Ni Y, Liu Y. Preparation of strong and tough conductive hydrogel based on Grafting, Fe 3+-Catechol complexations and salting out for triboelectric nanogenerators. J Colloid Interface Sci 2024; 661:450-459. [PMID: 38308885 DOI: 10.1016/j.jcis.2024.01.170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 01/16/2024] [Accepted: 01/24/2024] [Indexed: 02/05/2024]
Abstract
The development of a strong and tough conductive hydrogel capable of meeting the strict requirements of the electrode of a hydrogel-based triboelectric nanogenerator (H-TENG) remains an enormous challenge. Herein, a robust conductive polyvinyl alcohol (PVA) hydrogel is designed via a three-step method: (1) grafting with 3,4-dihydroxy benzaldehyde, (2) metal complexation using ferric chloride (FeCl3) and (3) salting-out using sodium citrate. The hydrogel contains robust crystalline PVA domains and reversible/high-density non-covalent interactions, such as hydrogen bonding, π-π interactions and Fe3+-catechol complexations. Benefiting from the crystalline domains, the hydrogel can resist external forces to the hydrogel network; meanwhile, the reversible/high-density of non-covalent interactions can impart gradual and persistent energy dissipation during deformation. The hydrogel possesses multiple cross-linked networks, with 6.47 MPa tensile stress, 1000 % strain, 35.24 MJ/m3 toughness and 37.59 kJ/m2 fracture energy. Furthermore, the inter-connected porous hydrogel has an ideal structure for ionic-conducing channels. The hydrogel is assembled into an H-TENG, which can generate open circuit voltage of ∼ 150 V, short-circuit current of ∼ 3.0 μA, with superb damage immunity. Subsequently, road traffic monitoring systems are innovatively developed and demonstrated by using the H-TENG. This study provides a novel strategy to prepare superiorly strong and tough hydrogels that can meet the high demand for H-TENGs.
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Affiliation(s)
- Yu Yang
- State Key Laboratory of Bio-based Material and Green Papermaking, Key Laboratory of Pulp & Paper Science and Technology of Shandong Province/Ministry of Education, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, PR China
| | - Weikun Jiang
- State Key Laboratory of Bio-based Material and Green Papermaking, Key Laboratory of Pulp & Paper Science and Technology of Shandong Province/Ministry of Education, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, PR China.
| | - Yang Wang
- State Key Laboratory of Bio-based Material and Green Papermaking, Key Laboratory of Pulp & Paper Science and Technology of Shandong Province/Ministry of Education, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, PR China
| | - Chen Wu
- State Key Laboratory of Bio-based Material and Green Papermaking, Key Laboratory of Pulp & Paper Science and Technology of Shandong Province/Ministry of Education, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, PR China
| | - Honglei Chen
- State Key Laboratory of Bio-based Material and Green Papermaking, Key Laboratory of Pulp & Paper Science and Technology of Shandong Province/Ministry of Education, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, PR China
| | - Gaojin Lyu
- State Key Laboratory of Bio-based Material and Green Papermaking, Key Laboratory of Pulp & Paper Science and Technology of Shandong Province/Ministry of Education, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, PR China
| | - Jiliang Ma
- Liaoning Key Laboratory of Lignocellulose Chemistry and Biomaterials, Dalian Polytechnic University, Dalian, Liaoning 116034, PR China
| | - Yonghao Ni
- Limerick Pulp & Paper Centre & Department of Chemical Engineering, University of New Brunswick, Fredericton, New Brunswick E3B5A3, Canada.
| | - Yu Liu
- State Key Laboratory of Bio-based Material and Green Papermaking, Key Laboratory of Pulp & Paper Science and Technology of Shandong Province/Ministry of Education, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, PR China; Liaoning Key Laboratory of Lignocellulose Chemistry and Biomaterials, Dalian Polytechnic University, Dalian, Liaoning 116034, PR China.
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Tu X, Xu P, Zhu Y, Mi W, Bi Y. Molecular complexation properties of Cd 2+ by algal organic matter from Scenedesmus obliquus. Ecotoxicol Environ Saf 2023; 263:115378. [PMID: 37598544 DOI: 10.1016/j.ecoenv.2023.115378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 07/21/2023] [Accepted: 08/13/2023] [Indexed: 08/22/2023]
Abstract
A detailed understanding the metals binding with algal organic matter (AOM) is essential to gain a deeper insight into the toxicity and migration of metals in algae cell. However, the molecular complexation mechanism of the metals binding with AOM remains unclear. In this study, cadmium ion (Cd2+) binding properties of AOMs from Scenedesmus obliquus, which included extracellular organic matter (EOM) and intracellular organic matter (IOM), were screened. When Cd2+ < 0.5 mg/L, the accumulation of Cd2+ could reach 40%, while Cd2+ > 0.5 mg/L, the accumulation of Cd2+ was only about 10%. EOM decreased gradually (from 8.51 to 3.98 mg/L), while IOM increased gradually (from 9.62 to 21.00 mg/L). The spectral characteristics revealed that IOM was richer in peptides/proteins and had more hydrophilic than EOM. Both EOM and IOM contained three protein-like components (containing tryptophan and tyrosine) and one humic-like component, and their contents in IOM were higher than that in EOM. The tryptophan protein-like substances changed greatly during Cd2+ binding, and that the tryptophan protein-like substances complexed to Cd2+ before tyrosine protein-like substances in IOM was identified. Moreover, the functional groups of N-H, O-H, and CO in AOM played an important role, and the N-H group was priority to interacts with Cd2+ in the complexing process. More functional groups (such as C-O and C-N) were involved in the metals complexing in EOM than in IOM. It could be concluded that Cd2+ stress promoted the secretion of AOM in Scenedesmus obliquus, and proteins in AOM could complex Cd2+ and alleviate its toxicity to algal cell. These findings provided deep insights into the interaction mechanism of AOM with Cd2+ in aquatic environments.
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Affiliation(s)
- Xiaojie Tu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Pingping Xu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yuxuan Zhu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wujuan Mi
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
| | - Yonghong Bi
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
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Melo LFMD, Aquino-Martins VGDQ, Silva APD, Oliveira Rocha HA, Scortecci KC. Biological and pharmacological aspects of tannins and potential biotechnological applications. Food Chem 2023; 414:135645. [PMID: 36821920 DOI: 10.1016/j.foodchem.2023.135645] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 01/29/2023] [Accepted: 02/04/2023] [Indexed: 02/09/2023]
Abstract
Secondary metabolites are divided into three classes: phenolic, terpenoid, and nitrogenous compounds. Phenolic compounds are also known as polyphenols and include tannins, classified as hydrolysable or condensed. Herein, we explored tannins for their ROS reduction characteristics and role in homeostasis. These activities are associated with the numbers and degree of polymerisation of reactive hydroxyl groups present in the phenolic rings of tannins. These characteristics are associated with anti-inflammatory, anti-aging, and anti-proliferative health benefits. Tannins can reduce the risk of cancer and neurodegenerative diseases, such as cardiovascular diseases and Alzheimer's, respectively. These biomolecules may be used as nutraceuticals to maintain good gut microbiota. Industrial applications include providing durability to leather, anti-corrosive properties to metals, and substrates for 3D printing and in bio-based foam manufacture. This review updates regarding tannin-based research and highlights its biological and pharmacological relevance and potential applications.
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Affiliation(s)
- Luciana Fentanes Moura de Melo
- Departamento de Biologia Celular e Genética - Centro de Biociências, Universidade Federal do Rio Grande do Norte, Campus Universitário UFRN, 59072-970, Bairro Lagoa Nova, Natal, RN, Brazil; Programa de Pós-Graduação em Bioquímica e Biologia Molecular, Centro de Biociências, Universidade Federal do Rio Grande do Norte, Campus Universitário UFRN, 59078-970, Bairro Lagoa Nova, Natal, RN, Brazil
| | - Verônica Giuliani de Queiroz Aquino-Martins
- Departamento de Biologia Celular e Genética - Centro de Biociências, Universidade Federal do Rio Grande do Norte, Campus Universitário UFRN, 59072-970, Bairro Lagoa Nova, Natal, RN, Brazil; Programa de Pós-Graduação em Bioquímica e Biologia Molecular, Centro de Biociências, Universidade Federal do Rio Grande do Norte, Campus Universitário UFRN, 59078-970, Bairro Lagoa Nova, Natal, RN, Brazil
| | - Ariana Pereira da Silva
- Departamento de Biologia Celular e Genética - Centro de Biociências, Universidade Federal do Rio Grande do Norte, Campus Universitário UFRN, 59072-970, Bairro Lagoa Nova, Natal, RN, Brazil; Programa de Pós-Graduação em Bioquímica e Biologia Molecular, Centro de Biociências, Universidade Federal do Rio Grande do Norte, Campus Universitário UFRN, 59078-970, Bairro Lagoa Nova, Natal, RN, Brazil
| | - Hugo Alexandre Oliveira Rocha
- Programa de Pós-Graduação em Bioquímica e Biologia Molecular, Centro de Biociências, Universidade Federal do Rio Grande do Norte, Campus Universitário UFRN, 59078-970, Bairro Lagoa Nova, Natal, RN, Brazil; Departamento de Bioquímica - Centro de Biociências, Universidade Federal do Rio Grande do Norte, Campus Universitário UFRN, 59078-970, Bairro Lagoa Nova, Natal, RN, Brazil
| | - Katia Castanho Scortecci
- Departamento de Biologia Celular e Genética - Centro de Biociências, Universidade Federal do Rio Grande do Norte, Campus Universitário UFRN, 59072-970, Bairro Lagoa Nova, Natal, RN, Brazil; Programa de Pós-Graduação em Bioquímica e Biologia Molecular, Centro de Biociências, Universidade Federal do Rio Grande do Norte, Campus Universitário UFRN, 59078-970, Bairro Lagoa Nova, Natal, RN, Brazil.
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Choi I, Choi H, Lee JS, Han J. Novel color stability and colorimetry-enhanced intelligent CO 2 indicators by metal complexation of anthocyanins for monitoring chicken freshness. Food Chem 2023; 404:134534. [PMID: 36242957 DOI: 10.1016/j.foodchem.2022.134534] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 09/22/2022] [Accepted: 10/04/2022] [Indexed: 11/22/2022]
Abstract
This study aims to improve the color stability of anthocyanins and develop a CO2-sensitive indicator based on black goji anthocyanin (BGA) extract. Although the BGA extracts showed distinct color changes, such as red-purple-blue, their intrinsic color diminished after 24 h. A metal complexation method was used for the high color stability of BGA. BGA extracts were chelated with various concentrations of Al3+ [0 - 20% (w/w)]. It showed high color stability and strong intensity in a dose-dependent manner. A CO2-sensitive indicator sachet was developed using hydroxypropyl methylcellulose hydrogel, based on 5% (w/w) Al3+-BGA complexes. The indicator was applied to the chicken breast and detected its spoilage after 3 days with its changing color to greyish blue, due to the microbial growth to 7.00 log CFU/g. These results demonstrated the possibility of chelated anthocyanin complexes as indicating dyes and the ability to monitor the food quality changes through noticeable color changes.
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Affiliation(s)
- Inyoung Choi
- Institute of Control Agents for Microorganisms, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Hyelin Choi
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Jung-Soo Lee
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Jaejoon Han
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea; Department of Food Biosciences and Technology, College of Life Sciences and Biotechnology, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea.
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Zhao Q, Saito T, Miyakawa K, Sasamoto H, Kobayashi T, Sasaki T. Sorption of Cs + and Eu 3+ ions onto sedimentary rock in the presence of gamma-irradiated humic acid. J Hazard Mater 2022; 428:128211. [PMID: 35032954 DOI: 10.1016/j.jhazmat.2021.128211] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 12/20/2021] [Accepted: 12/31/2021] [Indexed: 06/14/2023]
Abstract
The influence of humic acid (HA) and its radiological degradation on the sorption of Cs+ and Eu3+ by sedimentary rock (obtained from the Horonobe Underground Research Laboratory in Japan) was investigated to understand the sorption process of metal ions and humic substances. Aldrich HA solution was gamma-irradiated assuming a strong radiation from a highly radioactive waste to be disposed of in deep geological formations. Batch sorption experiments were performed to evaluate the effect of gamma-irradiated HA on the sorption of Cs+ and Eu3+ ions. The addition of non-irradiated HA weakened the Eu sorption because of the lower sorption of the negatively charged Eu-HA complexes compared with free Eu ions. The sorption of Cs ions was barely affected by the presence of HA and its gamma irradiation. The concentration ratio of metal complexed and non-complexed species in the solid and liquid phases was evaluated by sequential filtration and chemical equilibrium calculations. The ratios were low in both phases for Cs and supported the minimal contribution of HA to Cs sorption. However, the concentration ratio for Eu3+ in the liquid phase was high, indicating that the complexing ability of HA to Eu3+ was higher than that of HA to Cs+.
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Affiliation(s)
- Qi Zhao
- Department of Nuclear Engineering, Kyoto University, Kyoto, Japan
| | - Takeshi Saito
- Institute for Integrated Radiation and Nuclear Science (KURNS), Kyoto University, Osaka, Japan
| | - Kazuya Miyakawa
- Horonobe Underground Research Center, Japan Atomic Energy Agency (JAEA), Hokkaido, Japan
| | - Hiroshi Sasamoto
- Horonobe Underground Research Center, Japan Atomic Energy Agency (JAEA), Hokkaido, Japan
| | - Taishi Kobayashi
- Department of Nuclear Engineering, Kyoto University, Kyoto, Japan
| | - Takayuki Sasaki
- Department of Nuclear Engineering, Kyoto University, Kyoto, Japan.
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Märcher A, Gothelf KV. Affinity-Guided Site-Selective Labeling of Nanobodies with Aldehyde Handles. Methods Mol Biol 2022; 2446:345-356. [PMID: 35157282 DOI: 10.1007/978-1-0716-2075-5_17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Antigen-binding proteins such as nanobodies are extensively used in biomedicine, diagnostics, and as tools for molecular biology. Often such applications require modification of the nanobodies with fluorophores or drugs. Here, we describe a robust method for introduction of aldehyde handles into His-tagged nanobodies and further derivatization of these proteins with hydroxylamine functionalized compounds of interest. The method allows for isolation of nanobodies containing one or more labels.
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Affiliation(s)
- Anders Märcher
- Department of Chemistry and Interdisciplinary Nanoscience Centre (iNANO), Aarhus University, Aarhus, Denmark
| | - Kurt V Gothelf
- Department of Chemistry and Interdisciplinary Nanoscience Centre (iNANO), Aarhus University, Aarhus, Denmark.
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Santo KP, Neimark AV. Effects of metal-polymer complexation on structure and transport properties of metal-substituted polyelectrolyte membranes. J Colloid Interface Sci 2021; 602:654-668. [PMID: 34147755 DOI: 10.1016/j.jcis.2021.06.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 06/01/2021] [Accepted: 06/02/2021] [Indexed: 11/30/2022]
Abstract
Morphological and transport properties of hydrated metal-substituted Nafion membranes doped with metal ions of different valency and coordination strength are explored using coarse-grained dissipative particle dynamics simulations. To incorporate the effects of metal-polymer complexation, we introduce a novel metal ion complexation model, in which the charged central metal ion is surrounded by dummy sites that coordinate with ligands. The model parameters are determined by matching the metal-ligand running coordination numbers and the diffusion coefficients obtained from atomistic simulations and/or experiments. The increase of valency and coordination strength is found to strongly influence both the morphology and transport characteristics of the membrane at all hydration levels. The membrane segregation into hydrophobic and hydrophilic sub-phases is affected by metal-sulphonate coordination induced crosslinking at the hydrophilic/hydrophobic interface. The simulation results indicate that the interfacial crosslinking influences the interfacial tension and thereby affect the growth and coalescence of water clusters upon the increase of hydration. Multivalent complexation hinders water and ion mobility and causes anomalous sub-diffusion and dramatic decrease of the water permeability and ionic conductivity. Our DPD model is found efficient in elucidating the mechanisms of coordination-induced cross-linking and complexation and predicting on a semi-quantitative level the morphological and transport properties of metal-substituted Nafion membranes depending on the ion valency and coordination strength. The proposed model can be further advanced and adopted for other polyelectrolyte systems, such as sulfonated block-copolymers, polysaccharide solutions and composites, and biopolymer assemblies.
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Affiliation(s)
- Kolattukudy P Santo
- Department of Chemical and Biochemical Engineering, Rutgers, The State University of New Jersey, 98 Brett Rd, Piscataway, NJ 08854, USA
| | - Alexander V Neimark
- Department of Chemical and Biochemical Engineering, Rutgers, The State University of New Jersey, 98 Brett Rd, Piscataway, NJ 08854, USA.
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Medigue NEH, Bouakouk-Chitti Z, Bechohra LL, Kellou-Taïri S. Theoretical study of the impact of metal complexation on the reactivity properties of Curcumin and its diacetylated derivative as antioxidant agents. J Mol Model 2021; 27:192. [PMID: 34057657 DOI: 10.1007/s00894-021-04768-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Accepted: 04/20/2021] [Indexed: 10/21/2022]
Abstract
The chemical behavior of Curcumin and its derivatives as antioxidant and metal chelator has become the subject of intense experimental research. In this work, a theoretical study was conducted with the aim to investigate whether the acetylation of the aromatic group in Curcumin, which makes it more lipophilic, will alter its biological activities. Also, we selected from the literature metal complexes of Curcumin and its diacetylated derivative with Ga(III) and In(III), in order to discriminate the molecular active sites of the investigated molecules in which the oxidative process occurs and to obtain information about their antioxidation mechanisms. The geometrical structures and electronic properties of these compounds have been obtained using the density functional theory (DFT) method, known for its accurate results. As our other objective is to understand the factors driving biological behavior of all the studied compounds as well as the impact of the metal complexation of Curcumin and its diacetylated derivative, we provided here evidences to explain experimental observations from a molecular reactivity perspective.
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Dos Santos JV, Fregolente LG, Mounier S, Hajjoul H, Ferreira OP, Moreira AB, Bisinoti MC. Fulvic acids from Amazonian anthropogenic soils: Insight into the molecular composition and copper binding properties using fluorescence techniques. Ecotoxicol Environ Saf 2020; 205:111173. [PMID: 32853866 DOI: 10.1016/j.ecoenv.2020.111173] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 08/08/2020] [Accepted: 08/11/2020] [Indexed: 06/11/2023]
Abstract
Fulvic acids (FA) are one of the components of humic substances and play an important role in the interaction with metallic species and, consequently, the bioavailability, distribution and toxicity of metals. However, only a few studies have investigated these FA properties in specific environment, such as anthropogenic soils. Therefore, knowledge about FA molecular composition as well as the FA-metal interaction is essential to predict their behavior in the soil. For this reason, the aim of this study was to investigate the molecular composition of FA extracted from two sites in an anthropogenic soil (Terra Mulata), from the Amazon region, as well as their interactions with Cu(II) ions as a model. Results from 13C NMR, infrared and elemental analysis showed that these FA are composed mostly by alkyl structures and oxygen-functional groups, e.g., hydroxyl, carbonyl and carboxyl. The interaction with Cu(II) ions was evaluated by fluorescence quenching, in which the FA showed both high quantity of complexing sites per gram of carbon and good affinity to interact with the metal when compared with other soil FA. The results showed that the complexation capacity was highly correlated by the content of functional groups, while the binding affinity was largely influenced by structural factors. In addition, through the lifetime decay given by time-resolved fluorescence, it was concluded that static quenching took place in FA and Cu(II) interaction with the formation of a non-fluorescent ground-state complex. Therefore, this fraction of soil organic matter will fully participate in complexation reactions, thereby influencing the mobility and bioavailability of metal in soils. Hence, the importance of the study, and the role of FA in the environment, can be seen especially in the Amazon, which is one of the most important biomes in the world.
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Affiliation(s)
- João Vitor Dos Santos
- Laboratório de Estudos em Ciências Ambientais, Departamento de Química e Ciências Ambientais, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista "Júlio de Mesquita Filho", 15054-000, São José do Rio Preto, São Paulo, Brazil; Université de Toulon, Aix Marseille Univ., CNRS/INSU, IRD, MIO UM 110, Mediterranean Institute of Oceanography, CS 60584, 83041, Toulon, France
| | - Laís Gomes Fregolente
- Laboratório de Estudos em Ciências Ambientais, Departamento de Química e Ciências Ambientais, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista "Júlio de Mesquita Filho", 15054-000, São José do Rio Preto, São Paulo, Brazil; Laboratório de Materiais Funcionais Avançados, Departamento de Física, Universidade Federal do Ceará, 60455-900, Fortaleza, Ceará, Brazil
| | - Stéphane Mounier
- Université de Toulon, Aix Marseille Univ., CNRS/INSU, IRD, MIO UM 110, Mediterranean Institute of Oceanography, CS 60584, 83041, Toulon, France
| | - Houssam Hajjoul
- Université de Toulon, Aix Marseille Univ., CNRS/INSU, IRD, MIO UM 110, Mediterranean Institute of Oceanography, CS 60584, 83041, Toulon, France
| | - Odair Pastor Ferreira
- Laboratório de Materiais Funcionais Avançados, Departamento de Física, Universidade Federal do Ceará, 60455-900, Fortaleza, Ceará, Brazil
| | - Altair Benedito Moreira
- Laboratório de Estudos em Ciências Ambientais, Departamento de Química e Ciências Ambientais, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista "Júlio de Mesquita Filho", 15054-000, São José do Rio Preto, São Paulo, Brazil
| | - Márcia Cristina Bisinoti
- Laboratório de Estudos em Ciências Ambientais, Departamento de Química e Ciências Ambientais, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista "Júlio de Mesquita Filho", 15054-000, São José do Rio Preto, São Paulo, Brazil.
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10
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Islas-Valdez S, López-Rayo S, Hristov-Emilov H, Hernández-Apaolaza L, Lucena JJ. Assessing metal-lignosulfonates as fertilizers using gel filtration chromatography and high-performance size exclusion chromatography. Int J Biol Macromol 2020; 142:163-71. [PMID: 31525412 DOI: 10.1016/j.ijbiomac.2019.09.088] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 09/03/2019] [Accepted: 09/11/2019] [Indexed: 11/24/2022]
Abstract
Lignosulfonates (LSs) are by-products from the paper industry used as biodegradable fertilizers. However, metal-LS ability to provide micronutrients to crops is related to the stability of the complex and the amount of metal complexed. This work evaluated these parameters using ultraviolet-visible (UV-Vis), Fourier-transform infrared (FTIR), and 13C-nuclear magnetic resonance (NMR), along with gel filtration chromatography (GFC) and high-performance size exclusion chromatography (HPSEC), for different spruce, eucalyptus, and pine LSs. GFC and HPSEC pointed out that the amount and type of complexed metal in the LS depends on the molecular weight, pH, and sulphite pulping processes. Both techniques indicated that the low molecular weight LS enriched with phenolic groups has the highest Fe(III) complexing capacity. Also, Fe(III)/LS showed the formation of high molecular weight compounds, whereas Zn(II)/LS and Mn(II)/LS complexes did not form aggregates. Metal-LS fractionation provided considerable information to identify LSs with potential fertilizer capacity and to assess the effectiveness of their complexes.
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Huang KZ, Tang HL, Xie YF. Impacts of shale gas production wastewater on disinfection byproduct formation: An investigation from a non-bromide perspective. Water Res 2018; 144:656-664. [PMID: 30096691 DOI: 10.1016/j.watres.2018.07.048] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Revised: 07/17/2018] [Accepted: 07/18/2018] [Indexed: 06/08/2023]
Abstract
The rapid rise of shale gas development has triggered environmental and human health concerns due to its impacts on water resources, especially on disinfection byproduct (DBP) formation upon chlorination. Despite the recently reported results on bromide, the effects of non-bromide ions in production wastewater at extremely high levels are vaguely defined. In this study, we investigated the effects of production wastewater, with bromide and non-bromide species, on the formation of DBPs when production wastewater was spiked into surface waters at various percentages. Results showed that the introduction of debrominated production wastewater led to increased formation of some chlorinated DBP species in selected surface water and wastewater. As the spiking percentage of debrominated production wastewater increased, the chlorinated DBP species increased. The contributions of individual cations to DBP formation followed a sequence of magnesium > calcium > barium at 0.10% spiking percentage due to the different catalytic effects of their chelates with organic precursors. The study of anions suggested that the discharge of treated production wastewater containing elevated sulfate may further enhance DBP formation. The significance of this study lies in the fact that in addition to bromide concerns from production wastewater, non-bromide species also contributed to DBP formation. The gas production wastewater management decision should consider the negative impacts from both bromide and non-bromide species to better protect the receiving water resources.
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Affiliation(s)
- Kuan Z Huang
- Environmental Programs, The Pennsylvania State University, Middletown, PA, 17057, USA
| | - Hao L Tang
- Department of Chemistry, Indiana University of Pennsylvania, Indiana, PA, 15705, USA
| | - Yuefeng F Xie
- Environmental Programs, The Pennsylvania State University, Middletown, PA, 17057, USA.
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12
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Pulicharla R, Drouinaud R, Brar SK, Drogui P, Proulx F, Verma M, Surampalli RY. Activation of persulfate by homogeneous and heterogeneous iron catalyst to degrade chlortetracycline in aqueous solution. Chemosphere 2018; 207:543-551. [PMID: 29843031 DOI: 10.1016/j.chemosphere.2018.05.134] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 04/03/2018] [Accepted: 05/23/2018] [Indexed: 06/08/2023]
Abstract
This study investigates the removal of chlortetracycline (CTC) antibiotic using sulfate radical-based oxidation process. Sodium persulfate (PS) was used as a source to generate sulfate radicals by homogeneous (Fe2+) and heterogeneous (zero valent iron, ZVI) iron as a catalyst. Increased EDTA concentration was used to break the CTC-Fe metal complexes during CTC estimation. The influence of various parameters, such as PS concentration, iron (Fe2+ and ZVI) concentration, PS/iron molar ratio, and pH were studied and optimum conditions were reported. CTC removal was increased with increasing concentration of PS and iron at an equal molar ratio of PS/Fe2+ and PS/ZVI processes. PS/Fe2+ and PS/ZVI oxidation processes at 1:2 (500 μM PS and 1000 μM) molar ratio showed 76% and 94% of 1 μM CTC removal in 2 h. Further increased molar ratio 1:2 onwards, PS/Fe2+ process showed a slight increase in CTC degradation whereas in PS/ZVI process showed similar degradation to 1:2 (PS/Fe) ratio at constant PS 500 μM concentration. Slower activation of persulfate which indirectly indicates the slower generation of sulfate radicals in PS/ZVI process showed higher degradation efficiency of CTC. The detected transformation products and their estrogenicity results stated that sulfate radicals seem to be efficient in forming stable and non-toxic end products.
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Affiliation(s)
- Rama Pulicharla
- INRS-ETE, Université du Québec, 490, Rue de la Couronne, Québec, Canada G1K 9A9
| | - Roggy Drouinaud
- Service du traitement des eaux, 214, Avenue St-Sacrement, Suite 210, Québec, Canada G1N 3X6
| | - Satinder Kaur Brar
- INRS-ETE, Université du Québec, 490, Rue de la Couronne, Québec, Canada G1K 9A9.
| | - Patrick Drogui
- INRS-ETE, Université du Québec, 490, Rue de la Couronne, Québec, Canada G1K 9A9
| | - Francois Proulx
- Service du traitement des eaux, 214, Avenue St-Sacrement, Suite 210, Québec, Canada G1N 3X6
| | - Mausam Verma
- CO2 Solutions Inc., 2300, Rue Jean-Perrin, Québec, Québec G2C 1T9 Canada
| | - Rao Y Surampalli
- Department of Civil Engineering, University of Nebraska-Lincoln, N104 SEC PO Box 886105, Lincoln, NE 68588-6105, USA
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13
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Isarankura-Na-Ayudhya P, Thippakorn C, Pannengpetch S, Roytrakul S, Isarankura-Na-Ayudhya C, Bunmee N, Sawangnual S, Prachayasittikul V. Metal complexation by histidine-rich peptides confers protective roles against cadmium stress in Escherichia coli as revealed by proteomics analysis. PeerJ 2018; 6:e5245. [PMID: 30065864 PMCID: PMC6064632 DOI: 10.7717/peerj.5245] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Accepted: 06/26/2018] [Indexed: 11/25/2022] Open
Abstract
The underlying mechanism and cellular responses of bacteria against toxic cadmium ions is still not fully understood. Herein, Escherichia coli TG1 expressing hexahistidine-green fluorescent protein (His6GFP) and cells expressing polyhistidine-fused to the outer membrane protein A (His-OmpA) were applied as models to investigate roles of cytoplasmic metal complexation and metal chelation at the surface membrane, respectively, upon exposure to cadmium stress. Two-dimensional gel electrophoresis (2-DE) and two-dimensional difference in gel electrophoresis (2D-DIGE) in conjunction with mass spectrometry-based protein identification had successfully revealed the low level expression of antioxidative enzymes and stress-responsive proteins such as manganese-superoxide dismutase (MnSOD; +1.65 fold), alkyl hydroperoxide reductase subunit C (AhpC; +1.03 fold) and DNA starvation/stationary phase protection protein (Dps; −1.02 fold) in cells expressing His6GFP in the presence of 0.2 mM cadmium ions. By contrarily, cadmium exposure led to the up-regulation of MnSOD of up to +7.20 and +3.08 fold in TG1-carrying pUC19 control plasmid and TG1 expressing native GFP, respectively, for defensive purposes against Cd-induced oxidative cell damage. Our findings strongly support the idea that complex formation between cadmium ions and His6GFP could prevent reactive oxygen species (ROS) caused by interaction between Cd2+ and electron transport chain. This coincided with the evidence that cells expressing His6GFP could maintain their growth pattern in a similar fashion as that of the control cells even in the presence of harmful cadmium. Interestingly, overexpression of either OmpA or His-OmpA in E. coli cells has also been proven to confer protection against cadmium toxicity as comparable to that observed in cells expressing His6GFP. Blockage of metal uptake as a consequence of anchored polyhistidine residues on surface membrane limited certain amount of cadmium ions in which some portion could pass through and exert their toxic effects to cells as observed by the increased expression of MnSOD of up to +9.91 and +3.31 fold in case of TG1 expressing only OmpA and His-OmpA, respectively. Plausible mechanisms of cellular responses and protein mapping in the presence of cadmium ions were discussed. Taken together, we propose that the intracellular complexation of cadmium ions by metal-binding regions provides more efficiency to cope with cadmium stress than the blockage of metal uptake at the surface membrane. Such findings provide insights into the molecular mechanism and cellular adaptation against cadmium toxicity in bacteria.
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Affiliation(s)
| | - Chadinee Thippakorn
- Center for Research and Innovation, Faculty of Medical Technology, Mahidol University, Bangkok, Thailand
| | - Supitcha Pannengpetch
- Center for Research and Innovation, Faculty of Medical Technology, Mahidol University, Bangkok, Thailand
| | - Sittiruk Roytrakul
- Genome Institute, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, Pathumthani, Thailand
| | | | - Nipawan Bunmee
- Department of Medical Technology, Faculty of Allied Health Science, Thammasat University, Pathumthani, Thailand
| | - Suchitra Sawangnual
- Department of Medical Technology, Faculty of Allied Health Science, Thammasat University, Pathumthani, Thailand
| | - Virapong Prachayasittikul
- Department of Clinical Microbiology and Applied Technology, Faculty of Medical Technology, Mahidol University, Bangkok, Thailand
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14
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Burek K, Eidner S, Kuke S, Kumke MU. Intramolecular deactivation processes of electronically excited Lanthanide(III) complexes with organic acids of low molecular weight. Spectrochim Acta A Mol Biomol Spectrosc 2018; 191:36-49. [PMID: 28982067 DOI: 10.1016/j.saa.2017.09.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Revised: 08/16/2017] [Accepted: 09/08/2017] [Indexed: 06/07/2023]
Abstract
The luminescence of Lanthanide(III) complexes with different model ligands was studied under direct as well as sensitized excitation conditions. The research was performed in the context of studies dealing with deep-underground storages for high-level nuclear waste. Here, Lanthanide(III) ions served as natural analogues for Actinide(III) ions and the low-molecular weight organic ligands are present in clay minerals and furthermore, they were employed as proxies for building blocks of humic substances, which are important complexing molecules in the natural environment, e.g., in the far field of a repository site. Time-resolved luminescence spectroscopy was applied for a detailed characterization of Eu(III), Tb(III), Sm(III) and Dy(III) complexes in aqueous solutions. Based on the observed luminescence the ligands were tentatively divided into two groups (A, B). The luminescence of Lanthanide(III) complexes of group A was mainly influenced by an energy transfer to OH-vibrations. Lanthanide(III) complexes of group B showed ligand-related luminescence quenching, which was further investigated. To gain more information on the underlying quenching processes of group A and B ligands, measurements at different temperatures (77K≤T≤353K) were performed and activation energies were determined based on an Arrhenius analysis. Moreover, the influence of the ionic strength between 0M≤I≤4M on the Lanthanide(III) luminescence was monitored for different complexes, in order to evaluate the influence of specific conditions encountered in host rocks foreseen as potential repository sites.
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Affiliation(s)
- Katja Burek
- University of Potsdam, Institute of Chemistry (Physical Chemistry), Karl-Liebknecht-Str.24-25, 14476 Potsdam-Golm, Germany.
| | - Sascha Eidner
- University of Potsdam, Institute of Chemistry (Physical Chemistry), Karl-Liebknecht-Str.24-25, 14476 Potsdam-Golm, Germany
| | - Stefanie Kuke
- KNAUER Wissenschaftliche Geräte GmbH, Hegauer Weg 38, 14163 Berlin, Germany
| | - Michael U Kumke
- University of Potsdam, Institute of Chemistry (Physical Chemistry), Karl-Liebknecht-Str.24-25, 14476 Potsdam-Golm, Germany.
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Hogan DE, Curry JE, Pemberton JE, Maier RM. Rhamnolipid biosurfactant complexation of rare earth elements. J Hazard Mater 2017; 340:171-178. [PMID: 28715740 DOI: 10.1016/j.jhazmat.2017.06.056] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Revised: 06/07/2017] [Accepted: 06/23/2017] [Indexed: 06/07/2023]
Abstract
Rare earth elements (REE) are vital for modern technologies and considered critical materials. This study investigated monorhamnolipid biosurfactant interactions with REE as the basis for REE recovery technology. Conditional stability constants (log β), measured using a resin-based ion exchange method, are reported for 16 REE and metals. These results were combined with existing data for 10 other metals to assess comparative strength and determinants of binding. The stability constants could be divided into three groups: weakly, moderately, and strongly bound. The REE were all in the strongly bound group (UO22+, Eu3+, Nd3+, Tb3+, Dy3+, La3+, Cu2+, Al3+, Pb2+, Y3+, Pr3+, and Lu3+) with log β ranging from 9.82 to 8.20. The elements Cd2+, In3+, Zn2+, Fe3+, Hg2+, and Ca2+ were moderately bound with log β=7.17-4.10. Finally, Sr2+, Co2+, Ni2+, UO22+, Ba2+, Mn2+, Mg2+, Rb+, and K+ were weakly bound with log β=3.95-0.96. Two log β values are reported for the uranyl ion due to two distinct binding regions. A mixed metals study and associated selectivity coefficients confirmed monorhamnolipids preferentially remove metals with large log β values over those with smaller values. Preferential complexation by monorhamnolipids may constitute a green pathway for recovery of REE from alternative, non-traditional sources.
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Affiliation(s)
- David E Hogan
- Department of Soil, Water and Environmental Science, University of Arizona, P.O. Box 210038, Tucson, AZ 85721, USA
| | - Joan E Curry
- Department of Soil, Water and Environmental Science, University of Arizona, P.O. Box 210038, Tucson, AZ 85721, USA
| | - Jeanne E Pemberton
- Department of Chemistry and Biochemistry, University of Arizona, P.O. Box 210041, Tucson, AZ 85721, USA
| | - Raina M Maier
- Department of Soil, Water and Environmental Science, University of Arizona, P.O. Box 210038, Tucson, AZ 85721, USA.
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16
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Ciccone L, Policar C, Stura EA, Shepard W. Human TTR conformation altered by rhenium tris-carbonyl derivatives. J Struct Biol 2016; 195:353-364. [PMID: 27402536 DOI: 10.1016/j.jsb.2016.07.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Revised: 07/07/2016] [Accepted: 07/08/2016] [Indexed: 01/13/2023]
Abstract
Transthyretin (TTR) is a 54 kDa homotetrameric serum protein that transports thyroxine (T4) and retinol. TTR is potentially amyloidogenic due to homotetramer dissociation into monomeric intermediates that self-assemble as amyloid deposits and insoluble fibrils. Most crystallographic structures, including those of amyloidogenic variants show the same tetramer without major variations in the monomer-monomer interface nor in the volume of the interdimeric cavity. Soaking TTR crystals in a solution containing rhenium tris-carbonyl derivatives yields a TTR conformer never observed before. Only one of the two monomers of the crystallographic dimer is significantly altered, and the inner part of the T4 binding cavity is expanded at one end and shrunk at the other. The result redefines the mechanism of allosteric communication between the two sites, suggesting that negative cooperativity is a function of dimer asymmetry, which can be induced through internal or external binding. An aspect that remains unexplained is why the conformational changes are ubiquitous throughout the crystal although the heavy metal content of the derivatized crystals is relatively low. The conformational changes observed, which include Leu(82), may represent a form of TTR better at scavenging β-Amyloid. At a resolution of 1.69Å, with excellent refinement statistics and well defined electron density for all parts of the structure, it is possible to envisage answering important questions that range from protein cooperative behavior to heavy atom induced protein conformational modifications that can result in crystallographic non-isomorphism.
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Affiliation(s)
- Lidia Ciccone
- Synchrotron SOLEIL, l'Orme des Merisiers, Saint Aubin, BP 48, 91192 Gif-sur-Yvette, France; CEA, iBiTec-S, Service d'Ingénierie Moléculaire des Protéines (SIMOPRO), Gif-sur-Yvette F-91191, France
| | - Clotilde Policar
- Ecole Normale Supérieure, Département de chimie, 24, rue Lhomond, 75005 Paris, France; Université Pierre et Marie Curie Paris 6, 4, Place Jussieu, 75005 Paris, France; CNRS, UMR7203, 75005 Paris, France
| | - Enrico A Stura
- Synchrotron SOLEIL, l'Orme des Merisiers, Saint Aubin, BP 48, 91192 Gif-sur-Yvette, France; CEA, iBiTec-S, Service d'Ingénierie Moléculaire des Protéines (SIMOPRO), Gif-sur-Yvette F-91191, France.
| | - William Shepard
- Synchrotron SOLEIL, l'Orme des Merisiers, Saint Aubin, BP 48, 91192 Gif-sur-Yvette, France
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17
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Traudt EM, Ranville JF, Smith SA, Meyer JS. A test of the additivity of acute toxicity of binary-metal mixtures of ni with Cd, Cu, and Zn to Daphnia magna, using the inflection point of the concentration-response curves. Environ Toxicol Chem 2016; 35:1843-51. [PMID: 26681657 PMCID: PMC5764768 DOI: 10.1002/etc.3342] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Revised: 09/17/2015] [Accepted: 12/12/2015] [Indexed: 05/06/2023]
Abstract
Mixtures of metals are often present in surface waters, leading to toxicity that is difficult to predict. To provide data for development of multimetal toxicity models, Daphnia magna neonates were exposed to individual metals (Cd, Cu, Ni, Zn) and to binary combinations of those metals in standard 48-h lethality tests conducted in US Environmental Protection Agency moderately hard reconstituted water with 3 mg dissolved organic carbon (DOC)/L added as Suwannee River fulvic acid. Toxicity tests were performed with mixtures of Ni and 1) Cd, which is considerably more toxic than Ni; 2) Cu, which is less toxic than Cd but more toxic than Ni; and 3) Zn, which has a toxicity threshold similar to Ni. For each combination of metals in the binary mixtures, the concentration of 1 metal was held constant while the second metal was varied through a series that ranged from nonlethal to lethal concentrations; then the roles of the metals were reversed. Inflection points of the concentration-response curves were compared to test for additivity of toxicity. Sublethal concentrations of Ni caused less-than-additive toxicity with Cd, slightly less-than-additive toxicity with Zn, and greater-than-additive toxicity with Cu. One explanation of these results might be competition among the metals for binding to biological ligands and/or dissolved organic matter. Therefore, models might have to incorporate sometimes competing chemical interactions to accurately predict metal-mixture toxicity. Environ Toxicol Chem 2016;35:1843-1851. © 2015 SETAC.
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Affiliation(s)
- Elizabeth M. Traudt
- Colorado School of Mines, Department of Chemistry and Geochemistry, Golden, Colorado, USA
- Address correspondence to
| | - James F. Ranville
- Colorado School of Mines, Department of Chemistry and Geochemistry, Golden, Colorado, USA
| | - Samantha A. Smith
- Colorado School of Mines, Department of Chemistry and Geochemistry, Golden, Colorado, USA
| | - Joseph S. Meyer
- Colorado School of Mines, Department of Chemistry and Geochemistry, Golden, Colorado, USA
- ARCADIS US, Lakewood, Colorado, USA
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18
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Gangopadhyay D, Singh SK, Sharma P, Mishra H, Unnikrishnan VK, Singh B, Singh RK. Spectroscopic and structural study of the newly synthesized heteroligand complex of copper with creatinine and urea. Spectrochim Acta A Mol Biomol Spectrosc 2016; 154:200-206. [PMID: 26529636 DOI: 10.1016/j.saa.2015.10.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 08/12/2015] [Accepted: 10/22/2015] [Indexed: 06/05/2023]
Abstract
Study of copper complex of creatinine and urea is very important in life science and medicine. In this paper, spectroscopic and structural study of a newly synthesized heteroligand complex of copper with creatinine and urea has been discussed. Structural studies have been carried out using DFT calculations and spectroscopic analyses were carried out by FT-IR, Raman, UV-vis absorption and fluorescence techniques. The copper complex of creatinine and the heteroligand complex were found to have much increased water solubility as compared to pure creatinine. The analysis of FT-IR and Raman spectra helps to understand the coordination properties of the two ligands and to determine the probable structure of the heteroligand complex. The LIBS spectra of the heteroligand complex reveal that the complex is free from other metal impurities. UV-visible absorption spectra and the fluorescence emission spectra of the aqueous solution of Cu-Crn-urea heteroligand complex at different solute concentrations have been analyzed and the complex is found to be rigid and stable in its monomeric form at very low concentrations.
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Affiliation(s)
| | - Sachin Kumar Singh
- Department of Chemistry, Banaras Hindu University, Varanasi 221005, India
| | - Poornima Sharma
- Department of Physics, Banaras Hindu University, Varanasi 221005, India
| | - Hirdyesh Mishra
- Physics Department, MMV, Banaras Hindu University, Varanasi 221005, India
| | - V K Unnikrishnan
- Centre for Atomic and Molecular Physics, Manipal University, Manipal 576 104, India
| | - Bachcha Singh
- Department of Chemistry, Banaras Hindu University, Varanasi 221005, India
| | - Ranjan K Singh
- Department of Physics, Banaras Hindu University, Varanasi 221005, India.
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19
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Pulicharla R, Das RK, Brar SK, Drogui P, Sarma SJ, Verma M, Surampalli RY, Valero JR. Toxicity of chlortetracycline and its metal complexes to model microorganisms in wastewater sludge. Sci Total Environ 2015; 532:669-675. [PMID: 26119381 DOI: 10.1016/j.scitotenv.2015.05.140] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2015] [Revised: 05/26/2015] [Accepted: 05/27/2015] [Indexed: 06/04/2023]
Abstract
Complexation of antibiotics with metals is a well-known phenomenon. Wastewater treatment plants contain metals and antibiotics, thus it is essential to know the effect of these complexes on toxicity towards microorganisms, typically present in secondary treatment processes. In this study, stability constants and toxicity of chlortetracycline (CTC) and metal (Ca, Mg, Cu and Cr) complexes were investigated. The calculated stability constants of CTC-metal complexes followed the order: Mg-CTC>Ca-CTC>Cu-CTC>Cr-CTC. Gram positive Bacillus thuringiensis (Bt) and Gram negative Enterobacter aerogenes (Ea) bacteria were used as model microorganisms to evaluate the toxicity of CTC and its metal complexes. CTC-metal complexes were more toxic than the CTC itself for Bt whereas for Ea, CTC and its metal complexes showed similar toxicity. In contrast, CTC spiked wastewater sludge (WWS) did not show any toxic effect compared to synthetic sewage. This study provides evidence that CTC and its metal complexes are toxic to bacteria when they are biologically available. As for WWS, CTC was adsorbed to solid part and was not biologically available to show measurable toxic effects.
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Affiliation(s)
- Rama Pulicharla
- INRS-ETE, Université du Québec, 490, Rue de la Couronne, Québec, G1K 9A9, Canada
| | - Ratul Kumar Das
- INRS-ETE, Université du Québec, 490, Rue de la Couronne, Québec, G1K 9A9, Canada
| | - Satinder Kaur Brar
- INRS-ETE, Université du Québec, 490, Rue de la Couronne, Québec, G1K 9A9, Canada.
| | - Patrick Drogui
- INRS-ETE, Université du Québec, 490, Rue de la Couronne, Québec, G1K 9A9, Canada
| | - Saurabh Jyoti Sarma
- INRS-ETE, Université du Québec, 490, Rue de la Couronne, Québec, G1K 9A9, Canada
| | - Mausam Verma
- CO2 Solutions Inc., 2300, Rue Jean-Perrin, Québec, Québec G2C 1T9, Canada
| | - Rao Y Surampalli
- Department of Civil Engineering, University of Nebraska-Lincoln, N104 SEC PO Box 886105, Lincoln, NE 68588-6105, USA
| | - Jose R Valero
- INRS-ETE, Université du Québec, 490, Rue de la Couronne, Québec, G1K 9A9, Canada
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20
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Michael-Kordatou I, Michael C, Duan X, He X, Dionysiou DD, Mills MA, Fatta-Kassinos D. Dissolved effluent organic matter: Characteristics and potential implications in wastewater treatment and reuse applications. Water Res 2015; 77:213-248. [PMID: 25917290 DOI: 10.1016/j.watres.2015.03.011] [Citation(s) in RCA: 234] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Revised: 02/19/2015] [Accepted: 03/16/2015] [Indexed: 06/04/2023]
Abstract
Wastewater reuse is currently considered globally as the most critical element of sustainable water management. The dissolved effluent organic matter (dEfOM) present in biologically treated urban wastewater, consists of a heterogeneous mixture of refractory organic compounds with diverse structures and varying origin, including dissolved natural organic matter, soluble microbial products, endocrine disrupting compounds, pharmaceuticals and personal care products residues, disinfection by-products, metabolites/transformation products and others, which can reach the aquatic environment through discharge and reuse applications. dEfOM constitutes the major fraction of the effluent organic matter (EfOM) and due to its chemical complexity, it is necessary to utilize a battery of complementary techniques to adequately describe its structural and functional character. dEfOM has been shown to exhibit contrasting effects towards various aquatic organisms. It decreases metal uptake, thus potentially reducing their bioavailability to exposed organisms. On the other hand, dEfOM can be adsorbed on cell membranes inducing toxic effects. This review paper evaluates the performance of various advanced treatment processes (i.e., membrane filtration and separation processes, activated carbon adsorption, ion-exchange resin process, and advanced chemical oxidation processes) in removing dEfOM from wastewater effluents. In general, the literature findings reveal that dEfOM removal by advanced treatment processes depends on the type and the amount of organic compounds present in the aqueous matrix, as well as the operational parameters and the removal mechanisms taking place during the application of each treatment technology.
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Affiliation(s)
- I Michael-Kordatou
- Department of Civil and Environmental Engineering and Nireas-International Water Research Centre, School of Engineering, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus
| | - C Michael
- Department of Civil and Environmental Engineering and Nireas-International Water Research Centre, School of Engineering, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus
| | - X Duan
- Department of Civil and Environmental Engineering and Nireas-International Water Research Centre, School of Engineering, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus; Environmental Engineering and Science Program, University of Cincinnati, Cincinnati, OH 45221-0071, USA
| | - X He
- Department of Civil and Environmental Engineering and Nireas-International Water Research Centre, School of Engineering, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus; Environmental Engineering and Science Program, University of Cincinnati, Cincinnati, OH 45221-0071, USA
| | - D D Dionysiou
- Department of Civil and Environmental Engineering and Nireas-International Water Research Centre, School of Engineering, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus; Environmental Engineering and Science Program, University of Cincinnati, Cincinnati, OH 45221-0071, USA
| | - M A Mills
- US EPA, Office of Research and Development, 26 W, Martin Luther King Drive, Cincinnati, OH 45268, USA
| | - D Fatta-Kassinos
- Department of Civil and Environmental Engineering and Nireas-International Water Research Centre, School of Engineering, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus.
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21
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Pornsunthorntawee O, Katepetch C, Vanichvattanadecha C, Saito N, Rujiravanit R. Depolymerization of chitosan-metal complexes via a solution plasma technique. Carbohydr Polym 2013; 102:504-12. [PMID: 24507312 DOI: 10.1016/j.carbpol.2013.11.025] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2013] [Revised: 11/17/2013] [Accepted: 11/19/2013] [Indexed: 10/26/2022]
Abstract
Chitosan-metal complexes were depolymerized under acidic conditions using a solution plasma system. Four different types of metal ions, including Ag(+), Zn(2+), Cu(2+), and Fe(3+) ions, were added to the chitosan solution at a metal-to-chitosan molar ratio of 1:8. The depolymerization rate was affected by the types of metal ions that form complexes with chitosan. The complexation of chitosan with Cu(2+) or Fe(3+) ions strongly promoted the depolymerization rate of chitosan using a solution plasma treatment. However, chitosan-Ag(+) and chitosan-Zn(2+) complexes exhibited no change in the depolymerization rate compared to chitosan. After plasma treatment of the chitosan-metal complexes, the depolymerized chitosan products were separated into water-insoluble and water-soluble fractions. The water-soluble fraction containing low-molecular-weight chitosan was obtained in a yield of less than 57% for the depolymerization of chitosan-Fe(3+) complex with the plasma treatment time of 180 min.
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Affiliation(s)
| | - Chaiyapruk Katepetch
- The Petroleum and Petrochemical College, Chulalongkorn University, Bangkok 10330, Thailand
| | | | - Nagahiro Saito
- Department of Materials, Physics and Energy Engineering, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - Ratana Rujiravanit
- The Petroleum and Petrochemical College, Chulalongkorn University, Bangkok 10330, Thailand; Center of Excellence on Petrochemical and Materials Technology, Chulalongkorn University, Bangkok 10330, Thailand.
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Al-Reasi HA, Wood CM, Smith DS. Characterization of freshwater natural dissolved organic matter (DOM): mechanistic explanations for protective effects against metal toxicity and direct effects on organisms. Environ Int 2013; 59:201-207. [PMID: 23831545 DOI: 10.1016/j.envint.2013.06.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2012] [Revised: 06/06/2013] [Accepted: 06/07/2013] [Indexed: 06/02/2023]
Abstract
Dissolved organic matter (DOM) exerts direct and indirect influences on aquatic organisms. In order to better understand how DOM causes these effects, potentiometric titration was carried out for a wide range of autochthonous and terrigenous freshwater DOM isolates. The isolates were previously characterized by absorbance and fluorescence spectroscopy. Proton binding constants (pKa) were grouped into three classes: acidic (pKa≤5), intermediate (5<pKa≤8.5) and basic (pKa>8.5). Generally, the proton site densities (LT) showed maximum peaks at the acidic and basic ends around pKa values of 3.5 and 10, respectively. More variably positioned peaks occurred in the intermediate pKa range. The acid-base titrations revealed the dominance of carboxylic and phenolic ligands with a trend for more autochthonous sources to have higher total LT. A summary parameter, referred to as the Proton Binding Index (PBI), was introduced to summarize chemical reactivity of DOMs based on the data of pKa and LT. Then, the already published spectroscopic data were explored and the specific absorbance coefficient at 340nm (i.e. SAC340), an index of DOM aromaticity, was found to exhibit a strong correlation with PBI. Thus, the tendencies observed in the literature that darker organic matter is more protective against metal toxicity and more effective in altering physiological processes in aquatic organisms can now be rationalized on a basis of chemical reactivity to protons.
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Affiliation(s)
- Hassan A Al-Reasi
- Department of Biology, McMaster University, Hamilton, ON L8S 4K1, Canada
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Branham ML, Moyo T, Abdallah HMI, Masina P. Tetracycline-ferrite nanocomposites formed via high-energy ball milling and the influence of milling conditions. Eur J Pharm Biopharm 2012; 83:184-92. [PMID: 23085583 DOI: 10.1016/j.ejpb.2012.09.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2011] [Revised: 09/20/2012] [Accepted: 09/24/2012] [Indexed: 11/26/2022]
Abstract
High-energy ball milling was used to mediate the formation of nanocomposites containing tetracycline and magnetic nanoparticles. Tetracycline-HCl was ball milled for 1, 3, 5, 15, and 30 h under argon or air atmosphere with preformed Mg 0.5 Zn 0.5 Fe2O4 nanoferrites prepared by glycolthermal method. The structural, thermal, and magnetic properties of these novel materials and the effect of milling atmosphere on composition, crystallinity and cation distribution were then characterized by ICP-OES, DSC/TGA, XRPD, ATR-IR, UV-Vis and Mössbauer spectroscopy. Tetracycline underwent rapid and consecutive metal coordination events in the milling process to yield complexes characterized by bathochromic shifts in its electronic spectra and suppression of electronic absorbance at 365 nm. Changes in stretching vibrations due to the A-ring carbonyl (1616 cm(-1)), amide II nitrogen (1602 cm(-1)), and CO bond (1039 cm(-1)) indicate Mg-type interactions imposed on the metals. Exothermic oxidation of the drug at 235°C disappeared after 5h milling with the nanoferrites, and the composites formed remained thermostable up to 500°C. Tetracycline-nanoferrites (Tet-NF) are magnetic-ordered materials with a well-defined spinel-type structure. Analysis of the Mössbauer data suggests that the milling time and atmosphere have significant influence on cation distributions in Tet-NF composites.
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Affiliation(s)
- Michael Lee Branham
- School of Pharmacy and Pharmacology, University of KwaZulu-Natal, Durban, South Africa
| | - Thomas Moyo
- School of Chemistry and Physics, University of KwaZulu-Natal, Durban, South Africa.
| | - Hafiz M I Abdallah
- School of Chemistry and Physics, University of KwaZulu-Natal, Durban, South Africa
| | - Patrick Masina
- School of Chemistry and Physics, University of KwaZulu-Natal, Durban, South Africa
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