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Zhao Y, Gao J, Zhou X, Li Z, Zhao C, Jia X, Ji M. Bio-immobilization and recovery of chromium using a denitrifying biofilm system: Identification of reaction zone, binding forms and end products. J Environ Sci (China) 2023; 126:70-80. [PMID: 36503795 DOI: 10.1016/j.jes.2022.03.050] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Revised: 03/29/2022] [Accepted: 03/29/2022] [Indexed: 06/17/2023]
Abstract
Chromium is an important resource in strategic metals. Different from most studies focusing on the bio-reduction of hexavalent chromium [Cr(VI)], this study aims to achieve the immobilization and recovery of chromium using a sequencing batch biofilm reactor. Results showed that Cr(VI) removal efficiency remained more than 99%, and 97% of reduced Cr(III) was immobilized in the biofilm. Immobilization zone, chromium forms and extracellular polymeric substances composition changes were combined to reveal the mechanism of Cr(VI) reduction and immobilization. The chromium distribution in biofilm demonstrated that intercellular layer was the main active zone with an immobilization amount of 891.70±126.32 mg/g-VSS. The reduced products analysis confirmed that trivalent chromium [Cr(III)] chelated with carboxyl, amino and other functional groups and immobilized in the form of organic Cr(III). The digestion method realized a chromium recovery efficiency of 74.59%. This study provides an alternative method for the bioremediation and resources recovery in chromium polluted wastewater.
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Affiliation(s)
- Yingxin Zhao
- School of environment Science and Engineering, Tianjin University, Tianjin 300350, China.
| | - Junzhi Gao
- School of environment Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Xu Zhou
- School of environment Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Zhouran Li
- School of environment Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Cailian Zhao
- School of environment Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Xulong Jia
- School of environment Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Min Ji
- School of environment Science and Engineering, Tianjin University, Tianjin 300350, China
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Bhandari G, Bagheri AR, Bhatt P, Bilal M. Occurrence, potential ecological risks, and degradation of endocrine disrupter, nonylphenol, from the aqueous environment. CHEMOSPHERE 2021; 275:130013. [PMID: 33647677 DOI: 10.1016/j.chemosphere.2021.130013] [Citation(s) in RCA: 61] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Revised: 02/14/2021] [Accepted: 02/17/2021] [Indexed: 06/12/2023]
Abstract
Nonylphenol (NP) is considered a potential endocrine-disrupting chemical affecting humans and the environment. Due to widespread occurrence in the aquatic environment and neuro-, immuno, reproductive, and estrogenic effects, nonylphenol calls for considerable attention from the scientific community, researchers, government officials, and the public. It can persist in the environment, especially soil, for a long duration because of its high hydrophobic nature. Nonylphenol is incorporated into the water matrices via agricultural run-off, wastewater effluents, agricultural sources, and groundwater leakage from the soil. In this regard, assessment of the source, fate, toxic effect, and removal of nonylphenol seems a high-priority concern. Remediation of nonylphenol is possible through physicochemical and microbial methods. Microbial methods are widely used due to ecofriendly in nature. The microbial strains of the genera, Sphingomonas, Sphingobium, Pseudomonas, Pseudoxanthomonas, Thauera, Novosphingonium, Bacillus, Stenotrophomonas, Clostridium, Arthrobacter, Acidovorax, Maricurvus, Rhizobium, Corynebacterium, Rhodococcus, Burkholderia, Acinetobacter, Aspergillus, Pleurotus, Trametes, Clavariopsis, Candida, Phanerochaete, Bjerkandera, Mucor, Fusarium and Metarhizium have been reported for their potential role in the degradation of NP via its metabolic pathway. This study outlines the recent information on the occurrence, origin, and potential ecological and human-related risks of nonylphenol. The current development in the removal of nonylphenol from the environment using different methods is discussed. Despite the significant importance of nonylphenol and its effects on the environment, the number of studies in this area is limited. This review gives an in-depth understanding of NP occurrence, fate, toxicity, and remediation from the environments.
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Affiliation(s)
- Geeta Bhandari
- Department of Biotechnology, Sardar Bhagwan Singh University Dehradun, Uttarakhand, India
| | | | - Pankaj Bhatt
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China.
| | - Muhammad Bilal
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huai'an, 223003, China.
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3
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Current and Emerging Adsorbent Technologies for Wastewater Treatment: Trends, Limitations, and Environmental Implications. WATER 2021. [DOI: 10.3390/w13020215] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Wastewater generation and treatment is an ever-increasing concern in the current century due to increased urbanization and industrialization. To tackle the situation of increasing environmental hazards, numerous wastewater treatment approaches are used—i.e., physical, chemical, and biological (primary to tertiary treatment) methods. Various treatment techniques being used have the risks of producing secondary pollutants. The most promising technique is the use of different materials as adsorbents that have a higher efficacy in treating wastewater, with a minimal production of secondary pollutants. Biosorption is a key process that is highly efficient and cost-effective. This method majorly uses the adsorption process/mechanism for toxicant removal from wastewater. This review elaborates the major agricultural and non-agricultural materials-based sorbents that have been used with their possible mechanisms of pollutant removal. Moreover, this creates a better understanding of how the efficacy of these sorbents can be enhanced by modification or treatments with other substances. This review also explains the re-usability and mechanisms of the used adsorbents and/or their disposal in a safe and environmentally friendly way, along with highlighting the major research gaps and potential future research directions. Additionally, the cost benefit ratio of adsorbents is elucidated.
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4
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Fungal Secondary Metabolites for Bioremediation of Hazardous Heavy Metals. Fungal Biol 2021. [DOI: 10.1007/978-3-030-68260-6_4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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5
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Hatem H, El-Geundi MS, Tantawy H, Baraka A. Buffering-like cationic coordination polymer AgM-CP for adsorptive removal of chromate anions from aqueous solution: Isotherm and thermodynamics. J SOLID STATE CHEM 2020. [DOI: 10.1016/j.jssc.2020.121271] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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6
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Qurbani K, Hamzah H. Intimate communication between Comamonas aquatica and Fusarium solani in remediation of heavy metal-polluted environments. Arch Microbiol 2020; 202:1397-1406. [DOI: 10.1007/s00203-020-01853-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2020] [Revised: 02/26/2020] [Accepted: 03/01/2020] [Indexed: 12/28/2022]
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7
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Mtibaà R, Ezzanad A, Aranda E, Pozo C, Ghariani B, Moraga J, Nasri M, Manuel Cantoral J, Garrido C, Mechichi T. Biodegradation and toxicity reduction of nonylphenol, 4-tert-octylphenol and 2,4-dichlorophenol by the ascomycetous fungus Thielavia sp HJ22: Identification of fungal metabolites and proposal of a putative pathway. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 708:135129. [PMID: 31806325 DOI: 10.1016/j.scitotenv.2019.135129] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Revised: 09/17/2019] [Accepted: 10/21/2019] [Indexed: 06/10/2023]
Abstract
Research on the biodegradation of emerging pollutants is gained great focus regarding their detrimental effects on the environment and humans. The objective of the present study was to evaluate the ability of the ascomycetes Thielavia sp HJ22 to remove the phenolic xenobiotics nonylphenol (NP), 4-tert-octylphenol (4-tert-OP) and 2,4-dichlorophenol (2,4-DCP). The strain showed efficient degradation of NP and 4-tert-OP with 95% and 100% removal within 8 h of incubation, respectively. A removal rate of 80% was observed with 2,4-DCP within the same time. Under experimental conditions, the degradation of the tested pollutants concomitantly increased with the laccase production and cytochrome P450 monooxygenases inhibition. This study showed the involvement of laccase in pollutants removal together with biosorption mechanisms. Additionally, results demonstrated the participation of cytochrome P450 monooxygenase in the elimination of 2,4-DCP. Liquid chromatography-mass spectrometry analysis revealed several intermediates, mainly hydroxylated and oxidized compounds with less harmful effects compared to the parent compounds. A decrease in the toxicity of the identified metabolites was observed using Aliivibrio fischeri as bioindicator. The metabolic pathways of degradation were proposed based on the identified metabolites. The results point out the potential of Thielavia strains in the degradation and detoxification of phenolic xenobiotics.
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Affiliation(s)
- Rim Mtibaà
- Laboratory of Enzyme Engineering and Microbiology, Department of Biology, National School of Engineers of Sfax, University of Sfax, BP «1173», 3038 Sfax, Tunisia.
| | - Abdellah Ezzanad
- Department of Organic Chemistry, University of Sciences, University of Cádiz, Polígono Rio San Pedro 11510, Puerto Real, Cádiz, Spain
| | - Elisabet Aranda
- Institute of Water Research, Department of Microbiology, University of Granada, Ramón y Cajal 4, E-18071 Granada, Spain
| | - Clementina Pozo
- Institute of Water Research, Department of Microbiology, University of Granada, Ramón y Cajal 4, E-18071 Granada, Spain
| | - Bouthaina Ghariani
- Laboratory of Enzyme Engineering and Microbiology, Department of Biology, National School of Engineers of Sfax, University of Sfax, BP «1173», 3038 Sfax, Tunisia
| | - Javier Moraga
- Department of Organic Chemistry, University of Sciences, University of Cádiz, Polígono Rio San Pedro 11510, Puerto Real, Cádiz, Spain
| | - Moncef Nasri
- Laboratory of Enzyme Engineering and Microbiology, Department of Biology, National School of Engineers of Sfax, University of Sfax, BP «1173», 3038 Sfax, Tunisia
| | - Jesús Manuel Cantoral
- Department of Biomedicine, Biotechnology and Public Health, Facultad de Ciencias del Mar y Ambientales, University of Cádiz, Polígono Rio San Pedro 11510 Puerto Real, Cádiz, Spain
| | - Carlos Garrido
- Department of Biomedicine, Biotechnology and Public Health, Facultad de Ciencias del Mar y Ambientales, University of Cádiz, Polígono Rio San Pedro 11510 Puerto Real, Cádiz, Spain
| | - Tahar Mechichi
- Laboratory of Biochemistry and Enzymatic Engineering of Lipases, National School of Engineers of Sfax, University of Sfax, BP «1173», 3038 Sfax, Tunisia
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de Freitas GR, da Silva MGC, Vieira MGA. Biosorption technology for removal of toxic metals: a review of commercial biosorbents and patents. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:19097-19118. [PMID: 31104247 DOI: 10.1007/s11356-019-05330-8] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 04/30/2019] [Indexed: 06/09/2023]
Abstract
In last decades, the biosorption process has become one of the main alternative treatment technologies for the removal of pollutants from dilute aqueous solution. Among these pollutants, toxic metals have drawn attention due to their negative effects in human body and food chain. Even though biosorption is considered a cost-effective and eco-friendly technology to remove toxic metals from dilute wastewaters, there are still obstacles that restrain its commercialization. For this reason, various scientific articles and patents have been published each year to make more effective and economical this technology. This review reports an overview of past achievements, current research of biosorption studies, and future trends for the development of the biosorption as sustainable cleaner technology. Mechanisms of metal uptake, recovery and biosorbent regeneration, process design, commercial application of biosorbents, and patents registered are presented. Finally, future aspects in biosorption research and suggestions for its application will be discussed.
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Affiliation(s)
- Geovani Rocha de Freitas
- School of Chemical Engineering, Department of Process and Products Design, University of Campinas, Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-852, Brazil.
| | - Meuris Gurgel Carlos da Silva
- School of Chemical Engineering, Department of Process and Products Design, University of Campinas, Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-852, Brazil
| | - Melissa Gurgel Adeodato Vieira
- School of Chemical Engineering, Department of Process and Products Design, University of Campinas, Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-852, Brazil
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9
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Hydrometallurgical valorization of chromium, iron, and zinc from an electroplating effluent. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2018.09.050] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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10
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Janicki T, Długoński J, Krupiński M. Detoxification and simultaneous removal of phenolic xenobiotics and heavy metals with endocrine-disrupting activity by the non-ligninolytic fungus Umbelopsis isabellina. JOURNAL OF HAZARDOUS MATERIALS 2018; 360:661-669. [PMID: 30219529 DOI: 10.1016/j.jhazmat.2018.08.047] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Revised: 07/21/2018] [Accepted: 08/14/2018] [Indexed: 06/08/2023]
Abstract
Organic and inorganic pollutants well known to interfere with the major functions of the endocrine system co-occur widely in contaminated ecosystems. The aim of the study was to evaluate the ability of Umbelopsis isabellina fungus to simultaneously remove and detoxify multiple environmentally significant endocrine disruptors: the heavy metals Cd(II), Zn(II), Mn(II), Pb(II) and Ni(II) and the phenolic xenobiotics nonylphenol (t-NP), 4-cumylphenol (CP) and 4-tert-octylphenol (4-t-OP). The effects of the metals on fungal growth and efficiency of single-metal uptake were also investigated. U. isabellina exhibited considerable tolerance to Zn(II), Mn(II), Pb(II) and Ni(II), with IC50/24 values ranging from 5.08 for Ni(II) to 13.1 mM for Zn(II). In the presence of CP, the maximum efficiency of Pb(II) removal increased 25% relative to that of the control. Supplementation with Mn(II) or Zn(II) enhanced the 4-t-OP degradation by 18 or 9%, respectively, after 6 h of cultivation. Ecotoxicological assays monitoring bioindicators from different aquatic ecosystems revealed detoxification coinciding with the removal of metals and organic xenobiotics from binary mixtures. This work indicates the potential of a single microorganism, U. isabellina, to remove both heavy metals and organic xenobiotics from co-contaminated sites, making it a suitable candidate for the development of bioremediation strategies.
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Affiliation(s)
- Tomasz Janicki
- Department of Industrial Microbiology and Biotechnology, University of Lodz, Banacha 12/16, 90-237 Lodz, Poland
| | - Jerzy Długoński
- Department of Industrial Microbiology and Biotechnology, University of Lodz, Banacha 12/16, 90-237 Lodz, Poland
| | - Mariusz Krupiński
- Department of Industrial Microbiology and Biotechnology, University of Lodz, Banacha 12/16, 90-237 Lodz, Poland.
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Tigini V, Bevione F, Prigione V, Poli A, Ranieri L, Spennati F, Munz G, Varese GC. Tannery mixed liquors from an ecotoxicological and mycological point of view: Risks vs potential biodegradation application. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 627:835-843. [PMID: 29426208 DOI: 10.1016/j.scitotenv.2018.01.240] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 01/23/2018] [Accepted: 01/24/2018] [Indexed: 06/08/2023]
Abstract
Fungi are known to be present in the activated sludge of wastewater treatment plants (WWTP). Their study should be at the base of an overall vision of the plant effectiveness and of effluents sanitary impact. Moreover, it could be fundamental for the implementation of successful bioaugmentation strategies aimed at the removal of recalcitrant or toxic compounds. This is one of the first studies on the cultivable autochthonous mycoflora present in the mixed liquors of two WWTP treating either vegetable or chromium tannery effluents. All samples showed a risk associated with potential pathogens or toxigenic species and high ecotoxicity (Lepidium sativum and Raphidocelis subcapitata were the most sensitive organisms). Diverse fungal populations developed, depending on the origin of the samples (63% of the 102 identified taxa were sample-specific). The use of a fungistatic was determinant for the isolation and, thus, for the identification of sample-specific species with a lower growth rate. The incubation temperature also affected the mycoflora composition, even though at lower extent. A selective medium, consisting of agarised wastewater, allowed isolating fungi with a biodegradation potential. Pseudallescheria boydii/Scedosporium apiospermum species complex was ubiquitously dominant, indicating a possible role in the degradation of pollutants in both WWTP. Other species, i.e. Trichoderma spp., Trematosphaeria grisea, Geotrichum candidum, Lichtheimia corymbifera, Acremonium furcatum, Penicillium simplicissimum, Penicillium dangeardii, Fusarium solani, Scopulariopsis brevicaulis potentially could be involved in the degradation of specific pollutants of vegetable or chromium tannery wastewaters. However, several of these fungi are potential pathogens and their application, for an in situ treatment, must be carefully evaluated.
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Affiliation(s)
- Valeria Tigini
- Department of Life Sciences and Systems Biology, University of Turin, viale Mattioli 25, 10125 Turin, Italy.
| | - Federico Bevione
- Department of Life Sciences and Systems Biology, University of Turin, viale Mattioli 25, 10125 Turin, Italy
| | - Valeria Prigione
- Department of Life Sciences and Systems Biology, University of Turin, viale Mattioli 25, 10125 Turin, Italy
| | - Anna Poli
- Department of Life Sciences and Systems Biology, University of Turin, viale Mattioli 25, 10125 Turin, Italy
| | - Lucrezia Ranieri
- Department of Life Sciences and Systems Biology, University of Turin, viale Mattioli 25, 10125 Turin, Italy
| | - Francesco Spennati
- Department of Environmental and Civil Engineering, University or Florence, via Santa Marta 3, 50139 Firenze, Italy
| | - Giulio Munz
- Department of Environmental and Civil Engineering, University or Florence, via Santa Marta 3, 50139 Firenze, Italy
| | - Giovanna Cristina Varese
- Department of Life Sciences and Systems Biology, University of Turin, viale Mattioli 25, 10125 Turin, Italy
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Prigione V, Trocini B, Spina F, Poli A, Romanisio D, Giovando S, Varese GC. Fungi from industrial tannins: potential application in biotransformation and bioremediation of tannery wastewaters. Appl Microbiol Biotechnol 2018; 102:4203-4216. [DOI: 10.1007/s00253-018-8876-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 01/23/2018] [Accepted: 02/10/2018] [Indexed: 11/28/2022]
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Sheikhmohammadi A, Mohseni SM, khodadadi R, Sardar M, Abtahi M, Mahdavi S, Keramati H, Dahaghin Z, Rezaei S, Almasian M, Sarkhosh M, Faraji M, Nazari S. Application of graphene oxide modified with 8-hydroxyquinoline for the adsorption of Cr (VI) from wastewater: Optimization, kinetic, thermodynamic and equilibrium studies. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.02.101] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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14
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Fathi MR, Noormohamadi HR, Ghaedi M, Ghezelbash GR. Optimizing the biosorption of Bi3+ ions by Streptomyces rimosus using experimental design and applicability in kinetics and isotherm modeling. RSC Adv 2016. [DOI: 10.1039/c6ra03513b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This investigation seeks to analyze bismuth biosorption onto Streptomyces rimosus in solutions following optimization using a Box–Behnken Design (BBD).
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Tekay E, Şen S, Aydınoğlu D, Nugay N. Biosorbent immobilized nanotube reinforced hydrogel carriers for heavy metal removal processes. E-POLYMERS 2016. [DOI: 10.1515/epoly-2015-0168] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
AbstractA series of natural composite hydrogels containing a “3-in-1” type triple adsorbent system are designed. For this purpose, Spirulina (Sp) biosorbent is immobilized on/in halloysite nanotubes in different loadings and then physically crosslinked chitosan composite hydrogels are prepared. The water absorbency and Cr (VI) adsorption capacity in neutral pH medium and wet mechanical strength as well as their morphologies are all reported as a function of Sp immobilized nanotube loadings. The use of Sp biosorbent results in composite hydrogels with high water absorbency, wet strength and thermal stability. Spirulina enlarges the metal adsorption windows efficiently and the Freundlich isotherm model can fit the fundamental metal adsorption data well. It is believed that with optimized special composite hydrogel morphologies, all positively charged receptors of the Sp and the nanotubes behave as collector domains for chromate anions.
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Affiliation(s)
- Emre Tekay
- 1Department of Polymer Engineering, Yalova University, Yalova 77100, Turkey
| | - Sinan Şen
- 1Department of Polymer Engineering, Yalova University, Yalova 77100, Turkey
| | - Demet Aydınoğlu
- 2Department of Food Process Technologies, Yalova University, Yalova 77500, Turkey
| | - Nihan Nugay
- 3Department of Chemistry, Polymer Research Center, Boğaziçi University, İstanbul 34342, Turkey
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Vijayaraghavan K, Balasubramanian R. Is biosorption suitable for decontamination of metal-bearing wastewaters? A critical review on the state-of-the-art of biosorption processes and future directions. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2015; 160:283-96. [PMID: 26143501 DOI: 10.1016/j.jenvman.2015.06.030] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Revised: 06/16/2015] [Accepted: 06/18/2015] [Indexed: 05/17/2023]
Abstract
For the past few decades, biosorption has been widely investigated for the removal of different contaminants in aqueous media. A number of biomasses of different genre have been identified to possess good biosorption capacity. Insights into biosorption mechanisms have been provided by various researchers in order to develop a fundamental scientific understanding of the biosorption process. However, biosorption has not been employed widely for its large-scale commercial applications. The key factors that affect the growth and evolution of biosorption as a practical technology for decontamination of wastewaters include, (1) lack of investigations on multi-component solutions and wastewaters with complex matrix effects, (2) incomplete understanding of physico-chemical characteristics of biomasses of different types, (3) lack of studies to improve the performance of biosorbents through surface functionalization, and (4) non-integration of biosorption in wastewater/water treatment plants. This critical review aims to identify and discuss the practical limitations of biosorption and provide future research directions to make biosorption a technologically viable process with emphasis on selection and modification of biomasses to suit desired treatment applications, identify appropriate operation modes for large-scale applications of biosorption, and perform techno-economic evaluation of overall biosorption processes.
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Affiliation(s)
- K Vijayaraghavan
- Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai 600036, India.
| | - R Balasubramanian
- Division of Civil and Environmental Engineering, National University of Singapore, Singapore 117576, Singapore.
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Gusain D, Bux F, Sharma YC. Abatement of chromium by adsorption on nanocrystalline zirconia using response surface methodology. J Mol Liq 2014. [DOI: 10.1016/j.molliq.2014.04.026] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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18
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Tigini V, Prigione V, Varese GC. Mycological and ecotoxicological characterisation of landfill leachate before and after traditional treatments. THE SCIENCE OF THE TOTAL ENVIRONMENT 2014; 487:335-341. [PMID: 24793330 DOI: 10.1016/j.scitotenv.2014.04.026] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Revised: 03/28/2014] [Accepted: 04/06/2014] [Indexed: 06/03/2023]
Abstract
Pollution caused by landfill leachates is one of the main problems of urbanised areas, on account of their chemical composition, which turn in an ineffective treatment. A characterisation of leachates, which takes into account chemical, ecotoxicological and mycological aspects, is basilar for the evaluation of environmental impact of leachate and the development of suitable treatment techniques. In this study, the toxicity of a raw leachate and an effluent coming from traditional wastewater treatment plant was assessed by means of 4 ecotoxicological assays. Both the samples exceed the legal threshold value according to all the tested organisms, indicating the ineffectiveness of activated sludge treatment in the reduction of toxicity. The autochthonous mycoflora of the two samples was evaluated by filtration. The fungal load was 73 CFU for leachate and 102 CFU for the effluent. Ascomycetes were the dominant fraction (81% and 61%, for leachate and effluent respectively), followed by basidiomycetes (19% and 39%, respectively). Most of them were potential emerging pathogens. A decolourisation screening with autochthonous fungi was set up towards both samples in the presence or absence of glucose. Eleven fungi (basidiomycetes and ascomycetes) achieved up to 38% decolourisation yields, showing to be promising fungi for the bioremediation of leachates. Further experiment will be aimed to the study of decolourisation mechanism and toxicity reduction.
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Affiliation(s)
- Valeria Tigini
- Department of Life Sciences and Systems Biology, University of Turin, viale Mattioli, 25, 10125 Turin, Italy.
| | - Valeria Prigione
- Department of Life Sciences and Systems Biology, University of Turin, viale Mattioli, 25, 10125 Turin, Italy
| | - Giovanna Cristina Varese
- Department of Life Sciences and Systems Biology, University of Turin, viale Mattioli, 25, 10125 Turin, Italy
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Pan X, Liu Z, Chen Z, Cheng Y, Pan D, Shao J, Lin Z, Guan X. Investigation of Cr(VI) reduction and Cr(III) immobilization mechanism by planktonic cells and biofilms of Bacillus subtilis ATCC-6633. WATER RESEARCH 2014; 55:21-9. [PMID: 24583840 DOI: 10.1016/j.watres.2014.01.066] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2013] [Revised: 12/10/2013] [Accepted: 01/31/2014] [Indexed: 05/14/2023]
Abstract
In this study, we investigated the Cr(VI) uptake mechanism of planktonic cells and biofilms of Bacillus subtilis (B. subtilis) ATCC-6633. Data showed that the effect of planktonic cells on the Cr(VI) uptake was quite different from that of biofilms. Planktonic cells had strong ability of Cr(VI) reduction, while biofilms possessed a great potential of Cr(III) immobilization. For planktonic cells, 100 mg/L Cr(VI) could be completely reduced. Both exopolymeric substances and cytoplasmic extracts contributed to high capacity of Cr(VI) reduction. After the reduction, noticeable Cr(III) precipitates were accumulated on bacterial surfaces, but 37.5% Cr(III) still remained in the supernatant. For biofilms, the biofilm debris became the main active ingredient of the Cr(VI) reduction. However, only 20 mg/L Cr(VI) could be reduced probably because of unavailability of reducing active sites during the biofilm formation. Further studies showed that biofilms had a better Cr(III) immobilization capacity than planktonic cells with 100% Cr(III) immobilized. Moreover, for the first time, we proposed a strategy combining the advantages of both planktonic cells and biofilms, and a successful Cr(VI) removal from typical Cr(VI)-containing plating wastewater was achieved through a 10-L pilot-scale experiment.
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Affiliation(s)
- Xiaohong Pan
- Key Lab of Biopesticide and Chemical Biology, Fujian Agriculture and Forestry University, Ministry of Education, Fuzhou, Fujian 350002, PR China; State Key Lab of Structural Chemistry, Fujian Institute of Research on The Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, PR China
| | - Zunjing Liu
- State Key Lab of Structural Chemistry, Fujian Institute of Research on The Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, PR China
| | - Zhi Chen
- Key Lab of Biopesticide and Chemical Biology, Fujian Agriculture and Forestry University, Ministry of Education, Fuzhou, Fujian 350002, PR China; State Key Lab of Structural Chemistry, Fujian Institute of Research on The Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, PR China
| | - Yangjian Cheng
- State Key Lab of Structural Chemistry, Fujian Institute of Research on The Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, PR China
| | - Danmei Pan
- State Key Lab of Structural Chemistry, Fujian Institute of Research on The Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, PR China
| | - Jiening Shao
- Fuzhou No. 3 Middle School, Fuzhou, Fujian 350003, PR China
| | - Zhang Lin
- State Key Lab of Structural Chemistry, Fujian Institute of Research on The Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, PR China.
| | - Xiong Guan
- Key Lab of Biopesticide and Chemical Biology, Fujian Agriculture and Forestry University, Ministry of Education, Fuzhou, Fujian 350002, PR China.
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Shi J, Luo H, Hu J, Xiao D, TU Y, Lin B, Liang X. Removal of Cr6+Ions by Cross-Linked Cassava Xanthate from Aqueous Solution. ADVANCES IN POLYMER TECHNOLOGY 2014. [DOI: 10.1002/adv.21424] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jinheng Shi
- Guangzhou Institute of Chemistry; Chinese Academy of Sciences; Guangzhou People's Republic of China 510650
- Key Laboratory of Cellulose and Lignocellulosics Chemistry; Chinese Academy of Sciences; Guangzhou People's Republic of China 510650
- Chemistry Department; Guangxi University; Nanning People's Republic of China
| | - Hongsheng Luo
- Guangzhou Institute of Chemistry; Chinese Academy of Sciences; Guangzhou People's Republic of China 510650
- Key Laboratory of Cellulose and Lignocellulosics Chemistry; Chinese Academy of Sciences; Guangzhou People's Republic of China 510650
| | - Jiwen Hu
- Guangzhou Institute of Chemistry; Chinese Academy of Sciences; Guangzhou People's Republic of China 510650
- Key Laboratory of Cellulose and Lignocellulosics Chemistry; Chinese Academy of Sciences; Guangzhou People's Republic of China 510650
| | - Dingshu Xiao
- Guangzhou Institute of Chemistry; Chinese Academy of Sciences; Guangzhou People's Republic of China 510650
- Key Laboratory of Cellulose and Lignocellulosics Chemistry; Chinese Academy of Sciences; Guangzhou People's Republic of China 510650
| | - Yuanyuan TU
- Guangzhou Institute of Chemistry; Chinese Academy of Sciences; Guangzhou People's Republic of China 510650
- Key Laboratory of Cellulose and Lignocellulosics Chemistry; Chinese Academy of Sciences; Guangzhou People's Republic of China 510650
| | - Baofeng Lin
- College of Chemistry and Chemical Engineering; Guangxi University; Nanning People's Republic of China
| | - Xingquan Liang
- College of Chemistry and Chemical Engineering; Guangxi University; Nanning People's Republic of China
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21
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Palumbo AJ, Daughney CJ, Slade AH, Glover CN. Influence of pH and natural organic matter on zinc biosorption in a model lignocellulosic biofuel biorefinery effluent. BIORESOURCE TECHNOLOGY 2013; 146:169-175. [PMID: 23933024 DOI: 10.1016/j.biortech.2013.07.053] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Revised: 07/10/2013] [Accepted: 07/13/2013] [Indexed: 06/02/2023]
Abstract
The effect of dissolved natural organic matter (NOM) and pH on microbial biosorption of Zn was evaluated in a model lignocellulosic biofuel refinery effluent rich in NOM. Batch culture experiments conducted with two model microorganisms (yeast, Candida tropicalis; bacteria Novosphingobium nitrogenifigens Y88(T)), showed an inhibitory effect of NOM, and an optimum pH for Zn removal at 7.5-8.0. Membrane bioreactors with mixed autochthonous organisms were operated at pH 6.5 and pH 8.0 to better simulate real-world remediation scenarios. More Zn was removed at the high (91%) than at the low (26%) pH, presumably because the higher pH freed negatively-charged functional groups on the cellular biomass for passive Zn binding. Manipulating the pH of bioreactors can significantly improve metal removal in NOM rich wastewater. Such reactors could maintain water quality for closed-cycle biorefineries, leading to reduced water consumption, and a more sustainable biofuel.
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Affiliation(s)
| | - Christopher J Daughney
- Institute of Geological and Nuclear Sciences, PO Box 30-368, Lower Hutt 5040, New Zealand.
| | | | - Chris N Glover
- School of Biological Sciences, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand.
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22
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Wu Z, McGrouther K, Chen D, Wu W, Wang H. Subcellular distribution of metals within Brassica chinensis L. in response to elevated lead and Chromium Stress. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:4715-22. [PMID: 23621278 DOI: 10.1021/jf4005725] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Differential centrifugation and synchrotron radiation X-ray fluorescence spectroscopy (SRXRF) microprobe were used to study the distribution of the elements in tissue cross sections of pakchoi ( Brassica chinensis L.) under stress of elevated Pb and Cr. Subcellular fractionation of the different tissues grown in a nutrient solution containing 200 mg L(-1) Pb or 5 mg L(-1) Cr showed that 86.7 and 76.3% of the Pb that accumulated in the roots and shoots, respectively, was contained in the cell wall and vacuoles in those areas. Whereas 75.0% of the Cr that accumulated in the root was contained in the cell wall, 63.1% of the Cr that accumulated in the shoot was found in the vacuoles and cell wall. SRXRF analysis revealed that, when pakchoi seedlings were placed under excess Pb stress, the Pb, Ca, Cu, and Zn were concentrated in the cortex and vascular bundle of the root and mixed Fe-Mn plaques were seen on the surface of the pakchoi root. In the Cr treatment group, Cr, Ca, Mn, and Zn were mainly located in the cortex of the root, whereas in the stem, only Ca, Cu, and Zn were detected at higher levels in the cortex area. Thus, this study provides evidence that, in response to Pb and Cr stress, pakchoi uses cell walls and vacuoles to reduce the transport of these heavy metals through the plant, as well as restrict transport from the root to the stem.
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Affiliation(s)
- Zhipeng Wu
- Ministry of Education Key Laboratory of Protection and Development Utilization of Tropical Crop Germplasm Resources, Hainan University, Haikou 570228, China
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23
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Fungal Waste-Biomasses as Potential Low-Cost Biosorbents for Decolorization of Textile Wastewaters. WATER 2012. [DOI: 10.3390/w4040770] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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24
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Palumbo AJ, Taylor SC, Addison SL, Slade AH, Glover CN. Metal biosorption in lignocellulosic biofuel biorefinery effluent: an initial step towards sustainability of water resources. ACTA ACUST UNITED AC 2012; 39:1345-56. [DOI: 10.1007/s10295-012-1129-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2011] [Accepted: 04/07/2012] [Indexed: 10/28/2022]
Abstract
Abstract
Biosorption of metals by microorganisms is a promising technology to remove accumulated non-process elements in highly recycled biorefinery process water. Removal of these elements would enable greater water reuse and reduce the environmental impact of effluent discharge. A model lignocellulosic ethanol biorefinery wastewater was created based on pulp mill effluent. This generated a wastewater with an environmentally realistic high loading of dissolved natural organic matter (900 mg/l), a potentially important factor influencing metal biosorption. Analysis of feedstock and pulp mill effluent indicated that Mn and Zn are likely to be problematic in highly recycled lignocellulosic ethanol biorefinery process water. Therefore, the growth of several bacteria and fungi from existing collections, and some isolated from pulp mill effluent were tested in the model wastewater spiked with Mn and Zn (0.2 mM). Wastewater isolates grew the best in the wastewater. Metal uptake varied by species and was much greater for Zn than Mn. A bacterium, Novosphingobium nitrogenifigens Y88T, removed the most metal per unit biomass, 35 and 17 mg Mn/g. No other organism tested decreased the Mn concentration. A yeast, Candida tropicalis, produced the most biomass and removed the most total metal (38 % of Zn), while uptake per unit biomass was 24 mg Zn/g. These results indicate that microorganisms can remove significant amounts of metals in wastewater with high concentrations of dissolved natural organic matter. Metal sorption by autochthonous microorganisms in an anaerobic bioreactor may be able to extend water reuse and therefore lower the water consumption of future biorefineries.
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Affiliation(s)
- Amanda J Palumbo
- grid.457328.f 0000000419369203 Scion 49 Sala street 3010 Rotorua New Zealand
| | - Sean C Taylor
- grid.457328.f 0000000419369203 Scion 49 Sala street 3010 Rotorua New Zealand
| | - Sarah L Addison
- grid.457328.f 0000000419369203 Scion 49 Sala street 3010 Rotorua New Zealand
| | - Alison H Slade
- grid.457328.f 0000000419369203 Scion 49 Sala street 3010 Rotorua New Zealand
| | - Chris N Glover
- grid.21006.35 0000000121791970 School of Biological Sciences University of Canterbury Private Bag 4800 8140 Christchurch New Zealand
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25
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Chen Z, Huang Z, Cheng Y, Pan D, Pan X, Yu M, Pan Z, Lin Z, Guan X, Wu Z. Cr(VI) uptake mechanism of Bacillus cereus. CHEMOSPHERE 2012; 87:211-6. [PMID: 22225704 DOI: 10.1016/j.chemosphere.2011.12.050] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2011] [Revised: 12/19/2011] [Accepted: 12/19/2011] [Indexed: 05/17/2023]
Abstract
In this study, we investigated the Cr(VI) uptake mechanism in an indigenous Cr(VI)-tolerant bacterial strain -Bacillus cereus through batch and microscopic experiments. We found that both the cells and the supernatant collected from B. cereus cultivation could reduce Cr(VI). The valence state analysis revealed the complete transformation from Cr(VI) into Cr(III) by living B. cereus. Further X-ray absorption fine structure and Fourier transform infrared analyses showed that the reduced Cr(III) was coordinated with carboxyl and amido functional groups from either the cells or supernatant. Scanning electron microscopy and atomic force microscopy observation showed that noticeable Cr(III) precipitates were accumulated on bacterial surfaces. However, Cr(III) could also be detected in bacterial inner portions by using transmission electron microscopy thin section analysis coupled with energy dispersive X-ray spectroscopy. Through quantitative analysis of chromium distribution, we determined the binding ratio of Cr(III) in supernatant, cell debris and cytoplasm as 22%, 54% and 24%, respectively. Finally, we further discussed the role of bacterium-origin soluble organic molecules to the remediation of Cr(VI) pollutants.
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Affiliation(s)
- Zhi Chen
- State Key Lab of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, PR China
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Yahya SK, Zakaria ZA, Samin J, Raj ASS, Ahmad WA. Isotherm kinetics of Cr(III) removal by non-viable cells of Acinetobacter haemolyticus. Colloids Surf B Biointerfaces 2012; 94:362-8. [PMID: 22398363 DOI: 10.1016/j.colsurfb.2012.02.016] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2011] [Revised: 01/27/2012] [Accepted: 02/14/2012] [Indexed: 11/19/2022]
Abstract
The potential use of non-viable biomass of a Gram negative bacterium i.e. Acinetobacter haemolyticus to remove Cr(III) species from aqueous environment was investigated. Highest Cr(III) removal of 198.80 mg g(-1) was obtained at pH 5, biomass dosage of 15 mg cell dry weight, initial Cr(III) of 100 mg L(-1) and 30 min of contact time. The Langmuir and Freundlich models fit the experimental data (R(2)>0.95) while the kinetic data was best described using the pseudo second-order kinetic model (R(2)>0.99). Cr(III) was successfully recovered from the bacterial biomass using either 1M of CH(3)COOH, HNO(3) or H(2)SO(4) with 90% recovery. TEM and FTIR suggested the involvement of amine, carboxyl, hydroxyl and phosphate groups during the biosorption of Cr(III) onto the cell surface of A. haemolyticus. A. haemolyticus was also capable to remove 79.87 mg g(-1) Cr(III) (around 22.75%) from raw leather tanning wastewater. This study demonstrates the potential of using A. haemolyticus as biosorbent to remove Cr(III) from both synthetic and industrial wastewater.
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Affiliation(s)
- Siti Khairunnisa Yahya
- Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia
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Tigini V, Prigione V, Donelli I, Freddi G, Varese GC. Influence of Culture Medium on Fungal Biomass Composition and Biosorption Effectiveness. Curr Microbiol 2011; 64:50-9. [DOI: 10.1007/s00284-011-0017-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2011] [Accepted: 09/12/2011] [Indexed: 11/29/2022]
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28
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Ou H, Song Y, Huang W, Pan J, Xue Y, Yi C, Yan Y. Biosorption of Silver Ions by Paecilomyces Lilacinus Biomass: Equilibrium, Kinetics and Thermodynamics. ADSORPT SCI TECHNOL 2011. [DOI: 10.1260/0263-6174.29.9.887] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Affiliation(s)
- Hongxiang Ou
- School of the Environment, Jiangsu University, Zhenjiang, Jiangsu, 212013, P. R. China
| | - Yujun Song
- School of the Environment, Jiangsu University, Zhenjiang, Jiangsu, 212013, P. R. China
| | - Weihong Huang
- School of the Environment, Jiangsu University, Zhenjiang, Jiangsu, 212013, P. R. China
| | - Jianming Pan
- School of the Environment, Jiangsu University, Zhenjiang, Jiangsu, 212013, P. R. China
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, P. R. China
| | - Yonglai Xue
- School of the Environment, Jiangsu University, Zhenjiang, Jiangsu, 212013, P. R. China
| | - Chengwu Yi
- School of the Environment, Jiangsu University, Zhenjiang, Jiangsu, 212013, P. R. China
| | - Yongsheng Yan
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, P. R. China
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Fungal Biosorption, An Innovative Treatment for the Decolourisation and Detoxification of Textile Effluents. WATER 2010. [DOI: 10.3390/w2030550] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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31
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Poljsak B, Pócsi I, Raspor P, Pesti M. Interference of chromium with biological systems in yeasts and fungi: a review. J Basic Microbiol 2010; 50:21-36. [PMID: 19810050 DOI: 10.1002/jobm.200900170] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
This paper deals with the interactions of chromium (Cr) with biological systems, focusing in particular on yeasts and fungi. These interactions are analysed with primarily regard to biochemical functions, but higher levels of organization are also considered. Thus, the morphological and cytological characteristics of selected microorganisms in response to exposure to chromium ions are evaluated. The different oxidation states of chromium and reactive oxygen species (ROS) generated in redox reactions with chromium ions are presented and characterized. The interactions of the most exposed subcellular structures, including the cell wall, plasma membrane and nuclei, have been deeply investigated in recent years, for two major reasons. The first is the toxicity of chromium ions and their strong impact on the metabolism of many species, ranging from microbes to humans. The second is the still disputed usefulness of chromium ions, and in particular trivalent chromium, in the glucose and fat metabolisms. Chromium pollution is still an important issue in many regions of the world, and various solutions have been proposed for the bioremediation of soil and water with selected microbial species. Yeasts and especially moulds have been most widely investigated from this aspect, and the biosorption and bioaccumulation of chromium for bioremediation purposes have been demonstrated. Accordingly, the mechanisms of chromium tolerance or resistance of selected microbes are of particular importance in both bioremediation and waste water treatment technologies. The mechanisms of chromium toxicity and detoxification have been studied extensively in yeasts and fungi, and some promising results have emerged in this area.
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Affiliation(s)
- Borut Poljsak
- Chair of Environmental Health, Faculty of Health Studies, University of Ljubljana, Slovenia
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Hexavalent chromium removal by waste mycelium of Aspergillus awamori. JOURNAL OF THE SERBIAN CHEMICAL SOCIETY 2010. [DOI: 10.2298/jsc090331008g] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
In this study, the Cr(VI) removal potential of waste mycelium from the industrial xylanase-producing strain Aspergillus awamori was evaluated. It was determined by FTIR analysis that amino groups from the major fungal wall constituents, chitin and chitosan, played a key role in the metal binding process. The effect of pH, initial ion concentration, temperature and amount of biomass on the removal was also studied. The removal efficiency increased with decreasing pH and increasing temperature and amount of biomass. The mechanism of Cr(VI) removal by A. awamori can be explained by a two-stage process involving an initial adsorption stage followed by a reducing stage. The removal process was described by a second-order polynomial and the optimal process parameters for attaining Rmax 94.4 % in 48 h were predicted, i.e., pH 1.5 and T 40?C. From both economic and ecological points of view, a promising possibility for the utilization of waste industrial mycelium of A. awamori as a low-cost Cr(VI) removal agent was proposed.
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