151
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Bagheri S, Amini MM, Behbahani M, Rabiee G. Low cost thiol-functionalized mesoporous silica, KIT-6-SH, as a useful adsorbent for cadmium ions removal: A study on the adsorption isotherms and kinetics of KIT-6-SH. Microchem J 2019. [DOI: 10.1016/j.microc.2018.11.006] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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152
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Qiao W, Zhang Y, Xia H, Luo Y, Liu S, Wang S, Wang W. Bioimmobilization of lead by Bacillus subtilis X3 biomass isolated from lead mine soil under promotion of multiple adsorption mechanisms. ROYAL SOCIETY OPEN SCIENCE 2019; 6:181701. [PMID: 30891281 PMCID: PMC6408372 DOI: 10.1098/rsos.181701] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Accepted: 01/02/2019] [Indexed: 06/09/2023]
Abstract
In this study, a lead-resistant bacterium, Bacillus subtilis X3, was used to prepare a lead bioadsorbent for immobilization and removal of lead in lead solution. The lead shot precipitate was analysed by scanning electron microscopy combined with energy dispersive X-ray fluorescence microscopy, Fourier transform infrared spectroscopy, X-ray diffraction and X-ray photoelectron spectroscopy. The adsorbed lead was mainly mineralized to form Pb5(PO4)3OH, Pb10(PO4)6(OH)2 and Pb5(PO4)3Cl; however, other mechanisms that can also promote the mineralization of lead should not be ignored. For example, Na+ and Ca2+ on the cell wall surface were exchanged with Pb2+ in solution, which confirmed that the ion-exchange process occurred before mineralization. Moreover, adsorption bridging caused by extracellular polymeric substances also accelerated the further aggregation of lead, and the biomass was encapsulated by lead gradually. Hydroxyl, carbonyl, carboxyl and amine groups were not observed in lead mineral crystals, but the complexation between lead and these groups still benefited the mineralization of lead. The valence of Pb(II) was not changed after mineralization, which indicated that the biosorption process was not a redox reaction. Finally, biosorption occurred on the outer surface of the cell, but its specific surface area was relatively small, limiting the amount and efficiency of biosorption.
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153
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Metal ion adsorption from wastewater by g-C3N4 modified with hydroxyapatite: a case study from Sarcheshmeh Acid Mine Drainage. RESEARCH ON CHEMICAL INTERMEDIATES 2019. [DOI: 10.1007/s11164-018-03733-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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154
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Dias M, Gomes de Lacerda JTJ, Perdigão Cota de Almeida S, de Andrade LM, Oller do Nascimento CA, Rozas EE, Mendes MA. Response mechanism of mine-isolated fungus Aspergillus niger IOC 4687 to copper stress determined by proteomics. Metallomics 2019; 11:1558-1566. [DOI: 10.1039/c9mt00137a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Proteomic analysis of the fungus Aspergillus niger showed that its capacity to absorb metals was boosted by physiological modification under metal stress conditions.
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Affiliation(s)
- Meriellen Dias
- Dempster MS Lab – Chemical Engineering Department of Polytechnic School of University of São Paulo
- São Paulo-SP
- Brazil
| | | | | | - Lidiane Maria de Andrade
- Dempster MS Lab – Chemical Engineering Department of Polytechnic School of University of São Paulo
- São Paulo-SP
- Brazil
| | | | - Enrique Eduardo Rozas
- Dempster MS Lab – Chemical Engineering Department of Polytechnic School of University of São Paulo
- São Paulo-SP
- Brazil
| | - Maria Anita Mendes
- Dempster MS Lab – Chemical Engineering Department of Polytechnic School of University of São Paulo
- São Paulo-SP
- Brazil
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155
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Elimination of Toxic Heavy Metals from Aqueous Systems Using Potential Biosorbents: A Review. SPRINGER TRANSACTIONS IN CIVIL AND ENVIRONMENTAL ENGINEERING 2019. [DOI: 10.1007/978-981-13-1202-1_26] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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156
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Chen W, Zhang H, Liang Y, Ding H, Sun S. Adsorption Properties and Mechanism of Cd 2+ in Water by Zr-containing Silica Residue Purification. Front Chem 2018; 6:556. [PMID: 30533410 PMCID: PMC6265438 DOI: 10.3389/fchem.2018.00556] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 10/29/2018] [Indexed: 11/13/2022] Open
Abstract
Zirconium (Zr)-containing silica residue purification (ZSR-P) discharged from industrial production of ZrOCl2 was used as an adsorbent, and CdCl2 solution was used as the simulated wastewater containing cadmium ions (Cd2+). The properties and mechanisms of ZSR-P absorbing Cd2+ were studied. The results showed that ZSR-P had a good effect on the adsorption and removal of Cd2+ in water. The adsorption time, initial concentration of Cd2+, and pH of the solution had a significant effect on the adsorption behavior, whilst the pH value had the greatest effect amongst them. Under optimal conditions, the amount of Cd2+ adsorbed by ZSR-P was 43.1 mg/g. The isothermal adsorption conformed to the Langmuir adsorption model, and the adsorption kinetics conformed to the secondary adsorption rate model. In ZSR-P-Cd, Cd2+ was uniformly distributed on the surface of SiO2 particles and in the pores formed by the accumulation of particles. Adsorption of Cd2+ by ZSR-P was achieved through the reaction between Si-OH on the surface of SiO2 and Cd2+ hydroxyl compounds.
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Affiliation(s)
- Wanting Chen
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing, China
| | - Han Zhang
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing, China
| | - Yu Liang
- School of Materials Science and Technology, Shenyang University of Chemical Technology, Shenyang, China
| | - Hao Ding
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing, China
| | - Sijia Sun
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing, China
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157
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Du M, Ye S, Tang J, Lv S, Chen J, Orava J, Tao G, Lan P, Hao J, Yang Z, Qiu J, Zhou S. Scalable In-Fiber Manufacture of Functional Composite Particles. ACS NANO 2018; 12:11130-11138. [PMID: 30265797 DOI: 10.1021/acsnano.8b05560] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Advanced fabrication methods must be developed for magnetic-polymeric particles, which are used in medical diagnostics, drug delivery, separation, and environmental remediation. The development of scalable fabrication processes that enables simultaneously tuning of diameters and compositions of magnetic-polymeric particles remains a major challenge. Here, we proposed the production of high-quality magnetic-composite particles through a universal method based on the in-fiber Plateau-Rayleigh instability of polymeric fibers. This method can simultaneously control the particle diameter, hybrid configuration, and functional properties. The diameter of magnetic-polymeric particles can be reproducibly tuned from ∼20 nm to 1.25 mm, a wide range unachievable by conventional solution methods. The final diameter was controlled by the inner/outer fiber diameter ratio. We further showed that the prepared magnetic-polymeric composite particles can be used for the highly efficient recovery of heavy metals (98.2% for Cd2+) and for the precise separation of immune cells (CD4+ T cells). Overall, the in-fiber manufacture method can become a universal technology for the scalable preparation of different types of magnetic-polymeric composite particles with diverse functionalities.
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Affiliation(s)
- Minghui Du
- State Key Laboratory of Luminescent Materials and Devices, School of Materials Science and Engineering , South China University of Technology , Guangzhou 510640 , China
- Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques , Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices , Guangzhou 510640 , China
| | - Shubiao Ye
- Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases , The Sixth Affiliated Hospital of Sun Yat-Sen University , Guangzhou 510655 , China
| | - Junzhou Tang
- State Key Laboratory of Luminescent Materials and Devices, School of Materials Science and Engineering , South China University of Technology , Guangzhou 510640 , China
- Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques , Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices , Guangzhou 510640 , China
| | - Shichao Lv
- State Key Laboratory of Luminescent Materials and Devices, School of Materials Science and Engineering , South China University of Technology , Guangzhou 510640 , China
- Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques , Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices , Guangzhou 510640 , China
| | - Jiejie Chen
- State Key Laboratory of Luminescent Materials and Devices, School of Materials Science and Engineering , South China University of Technology , Guangzhou 510640 , China
- Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques , Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices , Guangzhou 510640 , China
| | - Jiri Orava
- IFW Dresden , Institute for Complex Materials , Helmholtzstr. 20 , Dresden 010 69 , Germany
| | - Guangming Tao
- School of Optical and Electronic Information, Wuhan National Laboratory for Optoelectronics , Huazhong University of Science and Technology , Wuhan 430074 , China
| | - Ping Lan
- Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases , The Sixth Affiliated Hospital of Sun Yat-Sen University , Guangzhou 510655 , China
| | - Jianhua Hao
- Department of Applied Physics , The Hong Kong Polytechnic University , Hung Hom, Kowloon , Hong Kong China
| | - Zhongmin Yang
- State Key Laboratory of Luminescent Materials and Devices, School of Materials Science and Engineering , South China University of Technology , Guangzhou 510640 , China
- Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques , Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices , Guangzhou 510640 , China
| | - Jianrong Qiu
- State Key Laboratory of Modern Optical Instrumentation, School of Materials Science and Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Shifeng Zhou
- State Key Laboratory of Luminescent Materials and Devices, School of Materials Science and Engineering , South China University of Technology , Guangzhou 510640 , China
- Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques , Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices , Guangzhou 510640 , China
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158
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Abstract
This research describes the adsorption of Cu2+ onto a helical ribbon carbon nanofiber. The characterization of carbon nanofiber by zeta potential showed an isoelectronic pH of 1.9. The influence of different adsorption factors, such as stirring speed, temperature, pH, adsorbent concentration, etc., on the Cu2+ adsorption capacity have been evaluated. The pH has a great influence on Cu2+ adsorption, with the maximum adsorption capacity reached at a pH of 10. The experimental data fit well to pseudo-second order kinetic and Langmuir isotherm models (qm = 8.80 mg·g−1) at T = 298 K and pH = 4. The Cu2+ adsorption could be explained by the particle diffusion model. Results showed that carbon nanofiber could be successfully used for the elimination of Cu2+ from wastewater.
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159
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Diep P, Mahadevan R, Yakunin AF. Heavy Metal Removal by Bioaccumulation Using Genetically Engineered Microorganisms. Front Bioeng Biotechnol 2018; 6:157. [PMID: 30420950 PMCID: PMC6215804 DOI: 10.3389/fbioe.2018.00157] [Citation(s) in RCA: 100] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Accepted: 10/09/2018] [Indexed: 11/25/2022] Open
Abstract
Wastewater effluents from mines and metal refineries are often contaminated with heavy metal ions, so they pose hazards to human and environmental health. Conventional technologies to remove heavy metal ions are well-established, but the most popular methods have drawbacks: chemical precipitation generates sludge waste, and activated carbon and ion exchange resins are made from unsustainable non-renewable resources. Using microbial biomass as the platform for heavy metal ion removal is an alternative method. Specifically, bioaccumulation is a natural biological phenomenon where microorganisms use proteins to uptake and sequester metal ions in the intracellular space to utilize in cellular processes (e.g., enzyme catalysis, signaling, stabilizing charges on biomolecules). Recombinant expression of these import-storage systems in genetically engineered microorganisms allows for enhanced uptake and sequestration of heavy metal ions. This has been studied for over two decades for bioremediative applications, but successful translation to industrial-scale processes is virtually non-existent. Meanwhile, demands for metal resources are increasing while discovery rates to supply primary grade ores are not. This review re-thinks how bioaccumulation can be used and proposes that it can be developed for bioextractive applications-the removal and recovery of heavy metal ions for downstream purification and refining, rather than disposal. This review consolidates previously tested import-storage systems into a biochemical framework and highlights efforts to overcome obstacles that limit industrial feasibility, thereby identifying gaps in knowledge and potential avenues of research in bioaccumulation.
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Affiliation(s)
| | | | - Alexander F. Yakunin
- BioZone - Centre for Applied Biosciences and Bioengineering, Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, ON, Canada
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160
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Deshmukh S, Sankaran KJ, Korneychuk S, Verbeeck J, Mclaughlin J, Haenen K, Roy SS. Nanostructured nitrogen doped diamond for the detection of toxic metal ions. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.07.067] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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161
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Mirzaee SS, Salahi E, Khanlarkhani A. Kinetics, isotherms and thermodynamic modeling of Mn 2+ and Zn 2+ single and binary removal using mercapto functionalized silica aerogel. J DISPER SCI TECHNOL 2018. [DOI: 10.1080/01932691.2018.1478301] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
| | - Esmaeil Salahi
- Department of Ceramic, Materials and Energy Research Center, Karaj, Iran
| | - Ali Khanlarkhani
- Nano-Technology and Advanced Materials Department, Materials and Energy Research Center, Karaj, Iran
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162
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Wang Y, Liu R. H 2O 2 treatment enhanced the heavy metals removal by manure biochar in aqueous solutions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 628-629:1139-1148. [PMID: 30045537 DOI: 10.1016/j.scitotenv.2018.02.137] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Revised: 01/14/2018] [Accepted: 02/12/2018] [Indexed: 05/12/2023]
Abstract
The physicochemical properties and adsorption capacities of yak manure biochar (SP350-YMB) and modified yak manure biochar by H2O2 (AC-YMB) were investigated. Results showed the oxygen content and the carboxyl group content of manure biochar increased by 63.4% and 101%, and the ash content decreased 42% after modification, respectively. Compared to SP350-YMB, the adsorption capacities of heavy metal ions (Pb2+, Cu2+, Cd2+ and Zn2+) were enhanced by AC-YMB in single-metal and multi-metal solutions. The maximum adsorption capacity of Pb2+ increased from 76.41mgg-1 by SP350-YMB to 169.57mgg-1 by AC-YMB based on Langmuir-Freundlich model in single-metal solutions. Pseudo-first and Pseudo-second-order model were used to predict the Pb2+ adsorption kinetics by AC-YMB. H2O2 modification reduced ash content and increased carboxyl content resulting in the major mechanism of heavy metal sorption shifting from precipitation with carbonate/phosphate to complexation with carboxyl. Results from this study indicated that H2O2 modified biochar could act as effective surface sorbent to remove heavy metals, but its ability to remove multi-metal ions needs to be carefully evaluated on an individual basis.
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Affiliation(s)
- Yan Wang
- Biomass Energy Engineering Research Centre, School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People's Republic of China; Key Laboratory of Urban Agriculture (South), Ministry of Agriculture, 800 Dongchuan Road, Shanghai 200240, People's Republic of China
| | - Ronghou Liu
- Biomass Energy Engineering Research Centre, School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People's Republic of China; Key Laboratory of Urban Agriculture (South), Ministry of Agriculture, 800 Dongchuan Road, Shanghai 200240, People's Republic of China.
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163
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Zare EN, Motahari A, Sillanpää M. Nanoadsorbents based on conducting polymer nanocomposites with main focus on polyaniline and its derivatives for removal of heavy metal ions/dyes: A review. ENVIRONMENTAL RESEARCH 2018; 162:173-195. [PMID: 29329014 DOI: 10.1016/j.envres.2017.12.025] [Citation(s) in RCA: 217] [Impact Index Per Article: 36.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 12/07/2017] [Accepted: 12/28/2017] [Indexed: 05/04/2023]
Abstract
Water contamination by toxic heavy metal ions and dyes remains a serious public health problem for humans, so attention on specific methods and technologies to remove heavy metal ions and dyes from wastewaters/aqueous solutions are desired. Numerous adsorbents have been reported for the removal of heavy metal ions/dyes from wastewaters/aqueous solutions. Polyaniline (PANI) and its derivatives, as conducting polymers, are good adsorbents to remove various kinds of heavy metal ions and dyes from wastewaters/aqueous solutions. The nanoadsorbents based on PANI and its derivatives have received much consideration, and are extensively reported in literature. This review focuses on the PANI and its derivatives based on nanoadsorbents for water purification. Various types of these nanoadsorbents used for the removal of heavy metal ions/dyes from wastewaters/aqueous solutions are also briefly compared in this review.
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Affiliation(s)
| | - Ahmad Motahari
- Young Researchers and Elite Club, Jahrom Branch, Islamic Azad University, Jahrom 74147-85318, Iran
| | - Mika Sillanpää
- Laboratory of Green Chemistry, Lappeenranta University of Technology, Sammonkatu 12, Mikkeli 50130, Finland
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164
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165
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Davarnejad R, Moraveji MK, Havaie M. Integral technique for evaluation and optimization of Ni (II) ions adsorption onto regenerated cellulose using response surface methodology. ARAB J CHEM 2018. [DOI: 10.1016/j.arabjc.2015.05.022] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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166
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Khalid R, Aslam Z, Abbas A, Ahmad W, Ramzan N, Shawabkeh R. Adsorptive potential of Acacia nilotica based adsorbent for chromium(VI) from an aqueous phase. Chin J Chem Eng 2018. [DOI: 10.1016/j.cjche.2017.08.017] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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167
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Eco-Friendly Treatment Strategies for Wastewater Containing Dyes and Heavy Metals. ENERGY, ENVIRONMENT, AND SUSTAINABILITY 2018. [DOI: 10.1007/978-981-10-7332-8_14] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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168
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Ince M, Kaplan İnce O. An Overview of Adsorption Technique for Heavy Metal Removal from Water/Wastewater: A Critical Review. ACTA ACUST UNITED AC 2017. [DOI: 10.29132/ijpas.358199] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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169
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Zhao R, Li X, Li Y, Li Y, Sun B, Zhang N, Chao S, Wang C. Functionalized magnetic iron oxide/polyacrylonitrile composite electrospun fibers as effective chromium (VI) adsorbents for water purification. J Colloid Interface Sci 2017; 505:1018-1030. [DOI: 10.1016/j.jcis.2017.06.094] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Revised: 06/27/2017] [Accepted: 06/28/2017] [Indexed: 12/15/2022]
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170
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Zhu Q, Wang Y, Li M, Liu K, Hu C, Yan K, Sun G, Wang D. Activable carboxylic acid functionalized crystalline nanocellulose/PVA- co -PE composite nanofibrous membrane with enhanced adsorption for heavy metal ions. Sep Purif Technol 2017. [DOI: 10.1016/j.seppur.2017.05.050] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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171
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Synthesis of a recyclable mesoporous nanocomposite for efficient removal of toxic Hg 2+ from aqueous medium. J IND ENG CHEM 2017. [DOI: 10.1016/j.jiec.2017.04.035] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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172
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Mahmoud ME, Abdou AEH, Sobhy ME, Fekry NA. Solid-solid crosslinking of carboxymethyl cellulose nanolayer on titanium oxide nanoparticles as a novel biocomposite for efficient removal of toxic heavy metals from water. Int J Biol Macromol 2017; 105:1269-1278. [PMID: 28757423 DOI: 10.1016/j.ijbiomac.2017.07.156] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 07/24/2017] [Accepted: 07/26/2017] [Indexed: 11/30/2022]
Abstract
Nano titanium oxide (Nano-TiO2) was used in this work as a solid support to solid-solid immobilize carboxymethyl cellulose via glutaraldehyde as an efficient cross linking reagent to produce a novel nanosized biocomposite (Nano-TiO2-glu-CMC). The synthesized materials were characterized by FT-IR to confirm crosslinking reaction between the two species as well as by HR-TEM, SEM, TGA and surface area analysis. The particle size was found to correspond to 22.2-44.4nm for Nano-TiO2-glu-CMC. The designed nanosized biocomposite was used and compared with Nano-TiO2 for separation and extraction of heavy metal ions such as Cd(II), Pb(II) and Hg(II) from aqueous solution by using batch experiment and microcolumn technique. The maximum metal sorption capacity values of Cd(II), Pb(II) and Hg(II) were established as 2440μmolg-1 (pH 7), 2880μmolg-1 (pH 6) and 1160μmolg-1 (pH 3), respectively. Optimization of the extraction experiments confirmed the maximum adsorption upon using 0.025g biocomposite dosage and 30min contact time.
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Affiliation(s)
- Mohamed E Mahmoud
- Faculty of Sciences, Chemistry Department, Alexandria University, P.O. Box 426, Alexandria 21321, Egypt.
| | - Azza E H Abdou
- Faculty of Sciences, Chemistry Department, Alexandria University, P.O. Box 426, Alexandria 21321, Egypt
| | - Mostafa E Sobhy
- Faculty of Sciences, Chemistry Department, Alexandria University, P.O. Box 426, Alexandria 21321, Egypt
| | - Nesma A Fekry
- Faculty of Sciences, Chemistry Department, Alexandria University, P.O. Box 426, Alexandria 21321, Egypt
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173
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Ur Rehman S, Khan AR, Sahiner M, Sengel SB, Aktas N, Siddiq M, Sahiner N. Removal of arsenate and dichromate ions from different aqueous media by amine based p(TAEA-co-GDE) microgels. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2017; 197:631-641. [PMID: 28432888 DOI: 10.1016/j.jenvman.2017.04.053] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Revised: 04/13/2017] [Accepted: 04/16/2017] [Indexed: 06/07/2023]
Abstract
In this work, microgels based on tris(2-aminoethyl) amine (TAEA) and glycerol diglycidyl ether (GDE) via simple microemulsion polymerization was prepared as p(TAEA-co-GDE) microgels were used as adsorbent for removal of dichromate (Cr (VI)) and arsenate (As (V)) ions from different aqueous environments. The p(TAEA-co-GDE) microgels were demonstrated very efficient adsorption capacity for Cr (VI), and As (V) that are 164.98 mg/g, and 123.64 mg/g from distilled (DI) water, respectively. The effect of the medium pH on the adsorption capacity of p(TAEA-co-GDE) microgels for Cr (VI) and As (V) ions were investigated. The maximum adsorption capacity was obtained at pH 4.0 for both ions with maximum adsorbed amounts of 160.62, and 98.72 mg/g, respectively. In addition, the microgels were also shown moderate adsorption capacity for Cr (VI) and As (V) from other water sources; tap water with 115.18 mg/g and 82.86 mg/g, sea water with 64.24 mg/g and 46.88 mg/g and creek water with 73.52 mg/g and 59.33 mg/g, respectively. Moreover, the increase in adsorbent dose from 0.025 to 0.125 g enhanced % adsorption of Cr (VI) from 54.13 to 98.03, and As (V) from % 26.72-98.70, respectively. For the adsorption process Langmuir and Freundlich adsorption isotherms were applied and found that Langmuir adsorption isotherm with R2 value of 0.99 for both the metal ions are suitable. Moreover, the experimental adsorption capacities of Cr (VI) and As (V) were found very close to the theoretical values calculated from Langmuir adsorption isotherm. More importantly, the microgels were made magnetic responsive to recover them easily from adsorption medium for reuse studies by applying external magnetic field with little decrease in adsorption capacity. Additionally, reusability of p(TAEA-co-GDE) microgels was also evaluated for adsorption of Cr (VI) and As (V) from DI water.
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Affiliation(s)
- Saif Ur Rehman
- Department of Chemistry, COMSATS Institute of Information Technology, Kyber Pakhtunkhwa, Abbottabad, 22060, Pakistan
| | - Abdur Rahman Khan
- Department of Chemistry, COMSATS Institute of Information Technology, Kyber Pakhtunkhwa, Abbottabad, 22060, Pakistan
| | - Mehtap Sahiner
- Ege University Leather Engineering, Bornova, Izmir, 35100, Turkey
| | - Sultan B Sengel
- Department of Chemistry, Faculty of Science & Arts, And Nanoscience and Technology Research and Application Center (NTRAC), Canakkale Onsekiz Mart University, Terzioglu Campus, 17100, Canakkale, Turkey
| | - Nahit Aktas
- Chemical Engineering Department, Yuzuncu Yil University, Campus, Van, 65080, Turkey
| | - Muhammad Siddiq
- Department of Chemistry, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - Nurettin Sahiner
- Department of Chemistry, Faculty of Science & Arts, And Nanoscience and Technology Research and Application Center (NTRAC), Canakkale Onsekiz Mart University, Terzioglu Campus, 17100, Canakkale, Turkey.
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174
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Artificial Neural Network Modeling and Genetic Algorithm Optimization for Cadmium Removal from Aqueous Solutions by Reduced Graphene Oxide-Supported Nanoscale Zero-Valent Iron (nZVI/rGO) Composites. MATERIALS 2017; 10:ma10050544. [PMID: 28772901 PMCID: PMC5459019 DOI: 10.3390/ma10050544] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/09/2017] [Revised: 05/07/2017] [Accepted: 05/12/2017] [Indexed: 11/17/2022]
Abstract
Reduced graphene oxide-supported nanoscale zero-valent iron (nZVI/rGO) composites were synthesized in the present study by chemical deposition method and were then characterized by various methods, such as Fourier-transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The nZVI/rGO composites prepared were utilized for Cd(II) removal from aqueous solutions in batch mode at different initial Cd(II) concentrations, initial pH values, contact times, and operating temperatures. Response surface methodology (RSM) and artificial neural network hybridized with genetic algorithm (ANN-GA) were used for modeling the removal efficiency of Cd(II) and optimizing the four removal process variables. The average values of prediction errors for the RSM and ANN-GA models were 6.47% and 1.08%. Although both models were proven to be reliable in terms of predicting the removal efficiency of Cd(II), the ANN-GA model was found to be more accurate than the RSM model. In addition, experimental data were fitted to the Langmuir, Freundlich, and Dubinin-Radushkevich (D-R) isotherms. It was found that the Cd(II) adsorption was best fitted to the Langmuir isotherm. Examination on thermodynamic parameters revealed that the removal process was spontaneous and exothermic in nature. Furthermore, the pseudo-second-order model can better describe the kinetics of Cd(II) removal with a good R2 value than the pseudo-first-order model.
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175
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Hase H, Nishiuchi T, Sato T, Otake T, Yaita T, Kobayashi T, Yoneda T. A novel method for remediation of nickel containing wastewater at neutral conditions. JOURNAL OF HAZARDOUS MATERIALS 2017; 329:49-56. [PMID: 28122277 DOI: 10.1016/j.jhazmat.2017.01.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Revised: 12/18/2016] [Accepted: 01/11/2017] [Indexed: 06/06/2023]
Abstract
Heavy metals contained in wastewater are generally removed by adding antalkaline to increase the pH, and Ni is commonly precipitated as Ni-hydroxides at pH 10. However, a more sustainable remediation method of treatment at neutral conditions would be attractive due to the high cost of chemical reagents and inefficient treatment at present. Based on natural attenuation, the method of adding Al ions has been used in wastewater treatment to precipitate layered double hydroxides (LDH). Here, we investigated the use of Al ion addition in the Ni containing wastewater treatment, experimentally and thermodynamically. By co-precipitation experiments adding Al ions to Ni-containing water, Ni was selectively incorporated into the structure of LDH, and the removal efficiency of Ni was close to 100% even in pH 7 and 8 samples (lower pH than conventional methods) with initial Ni concentrations of 200-10,000mg/L. Geochemical modeling results replicate the experimental results well when the Al/Ni ratio of LDH is assumed to be 0.33. This model makes it possible to estimate the amount of Al ions and additive agents necessary for use in treatment of wastewater containing different Ni concentrations.
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Affiliation(s)
- Haruko Hase
- Graduate School of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo 060-8628, Japan
| | - Toru Nishiuchi
- Graduate School of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo 060-8628, Japan
| | - Tsutomu Sato
- Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo 060-8628, Japan.
| | - Tsubasa Otake
- Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo 060-8628, Japan
| | - Tsuyoshi Yaita
- Materials Sciences Research Center, Japan Atomic Energy Agency, 1-1-1 Koto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - Tohru Kobayashi
- Materials Sciences Research Center, Japan Atomic Energy Agency, 1-1-1 Koto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - Tetsuro Yoneda
- Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo 060-8628, Japan
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176
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Muñoz AJ, Espínola F, Ruiz E. Biosorption of Ag(I) from aqueous solutions by Klebsiella sp. 3S1. JOURNAL OF HAZARDOUS MATERIALS 2017; 329:166-177. [PMID: 28131973 DOI: 10.1016/j.jhazmat.2017.01.044] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 01/18/2017] [Accepted: 01/23/2017] [Indexed: 06/06/2023]
Abstract
This study investigated the potential ability of Klebsiella sp. 3S1 to remove silver cations from aqueous solutions. The selected strain is a ubiquitous bacterium selected from among several microorganisms that had been isolated from wastewaters. To optimise the operating conditions in the biosorption process, a Rotatable Central Composite Experimental Design was developed establishing pH, temperature and biomass concentration as independent variables. Interaction mechanisms involved were analysed through kinetic and equilibrium studies. The experimental results suit pseudo-second order kinetics with two biosorption stages, being the first almost instantly. The Langmuir equilibrium model predicted a maximum capacity of biosorption (q) of 114.1mg Ag/g biomass. The study of the mechanisms involved in the biosorption was completed by employing advanced techniques which revealed that both bacterium-surface interactions and intracellular bioaccumulation participate in silver removal from aqueous solutions. The ability of Klebsiella sp. 3S1 to form silver chloride nanoparticles with interesting potential applications was also discussed.
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Affiliation(s)
- Antonio Jesús Muñoz
- Department of Chemical, Environmental and Materials Engineering, University of Jaén, 23071 Jaén, Spain
| | - Francisco Espínola
- Department of Chemical, Environmental and Materials Engineering, University of Jaén, 23071 Jaén, Spain
| | - Encarnación Ruiz
- Department of Chemical, Environmental and Materials Engineering, University of Jaén, 23071 Jaén, Spain.
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177
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Henderson L, Lilje E, Robinson K, Gleason FH, Lilje O. Chapter 30 Effects of Toxic Metals on Chytrids, Fungal-Like Organisms, and Higher Fungi. Mycology 2017. [DOI: 10.1201/9781315119496-31] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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178
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Removal of Zinc from Aqueous Solution by Optimized Oil Palm Empty Fruit Bunches Biochar as Low Cost Adsorbent. Bioinorg Chem Appl 2017; 2017:7914714. [PMID: 28420949 PMCID: PMC5379131 DOI: 10.1155/2017/7914714] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Accepted: 02/19/2017] [Indexed: 11/18/2022] Open
Abstract
This study aims to produce optimized biochar from oil palm empty fruit bunches (OPEFB), as a green, low cost adsorbent for uptake of zinc from aqueous solution. The impact of pyrolysis conditions, namely, highest treatment temperature (HTT), heating rate (HR), and residence time (RT) on biochar yield and adsorption capacity towards zinc, was investigated. Mathematical modeling and optimization of independent variables were performed employing response surface methodology (RSM). HTT was found to be the most influential variable, followed by residence time and heating rate. Based on the central composite design (CCD), two quadratic models were developed to correlate three independent variables to responses. The optimum production condition for OPEFB biochar was found as follows: HTT of 615°C, HR of 8°C/min, and RT of 128 minutes. The optimum biochar showed 15.18 mg/g adsorption capacity for zinc and 25.49% of yield which was in agreement with the predicted values, satisfactory. Results of the characterization of optimum product illustrated well-developed BET surface area and porous structure in optimum product which favored its sorptive ability.
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179
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Zhu Y, Bai Z, Wang B, Zhai L, Luo W. Microfluidic synthesis of renewable biosorbent with highly comprehensive adsorption performance for copper (II). Front Chem Sci Eng 2017. [DOI: 10.1007/s11705-017-1627-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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180
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Zanacic E, McMartin DW, Stavrinides J. From source to filter: changes in bacterial community composition during potable water treatment. Can J Microbiol 2017; 63:546-558. [PMID: 28264165 DOI: 10.1139/cjm-2017-0077] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Rural communities rely on surface water reservoirs for potable water. Effective removal of chemical contaminants and bacterial pathogens from these reservoirs requires an understanding of the bacterial community diversity that is present. In this study, we carried out a 16S rRNA-based profiling approach to describe the bacterial consortia in the raw surface water entering the water treatment plants of 2 rural communities. Our results show that source water is dominated by the Proteobacteria, Bacteroidetes, and Cyanobacteria, with some evidence of seasonal effects altering the predominant groups at each location. A subsequent community analysis of transects of a biological carbon filter in the water treatment plant revealed a significant increase in the proportion of Proteobacteria, Acidobacteria, Planctomycetes, and Nitrospirae relative to raw water. Also, very few enteric coliforms were identified in either the source water or within the filter, although Mycobacterium was of high abundance and was found throughout the filter along with Aeromonas, Legionella, and Pseudomonas. This study provides valuable insight into bacterial community composition within drinking water treatment facilities, and the importance of implementing appropriate disinfection practices to ensure safe potable water for rural communities.
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Affiliation(s)
- Enisa Zanacic
- a Engineering Support & Research, SaskWater, Moose Jaw, Regina, SK S6H 1C8, Canada
| | - Dena W McMartin
- b Faculty of Engineering and Applied Science, University of Regina, Regina, SK S4S 0A2, Canada
| | - John Stavrinides
- c Department of Biology, University of Regina, Regina, SK S4S 0A2, Canada
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181
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Badawi MA, Negm NA, Abou Kana MTH, Hefni HH, Abdel Moneem MM. Adsorption of aluminum and lead from wastewater by chitosan-tannic acid modified biopolymers: Isotherms, kinetics, thermodynamics and process mechanism. Int J Biol Macromol 2017; 99:465-476. [PMID: 28267611 DOI: 10.1016/j.ijbiomac.2017.03.003] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Revised: 02/23/2017] [Accepted: 03/01/2017] [Indexed: 12/07/2022]
Abstract
Chitosan was reacted by tannic acid to obtain three modified chitosan biopolymer. Their chemical structures were characterized by FTIR and elemental analysis. The prepared biopolymers were used to adsorb Al(III) and Pb(II) metal ions from industrial wastewater. The factors affecting the adsorption process were biosorbent amount, initial concentration of metal ion and pH of the medium. The adsorption efficiency increased considerably with the increase of the biosorbent amount and pH of the medium. The adsorption process of biosorbent on different metal ions was fitted by Freundlich adsorption model. The adsorption kinetics was followed Pseudo-second-order kinetic model. The adsorption process occurred according to diffusion mechanism which was confirmed by the interparticle diffusion model. The modified biopolymers were efficient biosorbents for removal of Pb(II) and Al(III) metal ions from the medium.
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Affiliation(s)
- M A Badawi
- Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt
| | - N A Negm
- Petrochemicals Department, Egyptian Petroleum Research Institute, Nasr City, Cairo, Egypt.
| | - M T H Abou Kana
- National Institute of Laser Enhanced Sciences, Cairo University, Giza, Egypt
| | - H H Hefni
- Petrochemicals Department, Egyptian Petroleum Research Institute, Nasr City, Cairo, Egypt
| | - M M Abdel Moneem
- Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt
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182
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Zhu Y, Bai ZS, Wang HL. Microfluidic synthesis of thiourea modified chitosan microsphere of high specific surface area for heavy metal wastewater treatment. CHINESE CHEM LETT 2017. [DOI: 10.1016/j.cclet.2016.10.031] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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183
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Verma S, Daverey A, Sharma A. Slow sand filtration for water and wastewater treatment – a review. ACTA ACUST UNITED AC 2017. [DOI: 10.1080/21622515.2016.1278278] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Srishti Verma
- School of Environment and Natural Resources, Doon University, Dehradun, Uttarakhand, India
| | - Achlesh Daverey
- School of Environment and Natural Resources, Doon University, Dehradun, Uttarakhand, India
| | - Archana Sharma
- School of Environment and Natural Resources, Doon University, Dehradun, Uttarakhand, India
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184
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Microbial strategy for potential lead remediation: a review study. World J Microbiol Biotechnol 2017; 33:35. [PMID: 28120310 DOI: 10.1007/s11274-017-2211-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Accepted: 01/16/2017] [Indexed: 10/20/2022]
Abstract
The extensive exploitation and usage of lead compounds result in severe lead(II) pollution in water and soil environments, even in agricultural land, threatening the health of animals and humans via food chains. The recovery and remediation of lead(II) from water and soil environments have been intensively concerned in recent years. Compared with the traditional physic-chemistry treatment, microbial remediation strategy is a promising alternative to remediate lead(II)-contaminated environments due to its cost-effective and environmentally-friendly properties. Various microorganisms are capable of removing or immobilizing lead(II) from water and soil environments through bioaccumulation, precipitation or accelerated transformation of lead(II) into a very stable mineral, resulting in significant effects on lead(II) mobility and bioavailability. In the present review, we investigated a wide diversity of lead(II) bioremediation induced by different microbes and its multi-mechanisms. Moreover, we also discussed the progress and limitations, summarized the common rules of lead(II)-microbe interaction, and evaluated the environmental significance of microbes in lead biogeochemistry process. In addition, we further deliberated the feasibility and potential application of microbes in developing cost-effective, eco-friendly bioremediation or long-term management strategy for lead(II) contaminated repositories.
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185
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186
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Korotta-Gamage SM, Sathasivan A. A review: Potential and challenges of biologically activated carbon to remove natural organic matter in drinking water purification process. CHEMOSPHERE 2017; 167:120-138. [PMID: 27716585 DOI: 10.1016/j.chemosphere.2016.09.097] [Citation(s) in RCA: 102] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Revised: 09/12/2016] [Accepted: 09/21/2016] [Indexed: 06/06/2023]
Abstract
The use of biologically activated carbon (BAC) in drinking water purification is reviewed. In the past BAC is seen mostly as a polishing treatment. However, BAC has the potential to provide solution to recent challenges faced by water utilities arising from change in natural organic matter (NOM) composition in drinking water sources - increased NOM concentration with a larger fraction of hydrophilic compounds and ever increasing trace level organic pollutants. Hydrophilic NOM is not removed by traditional coagulation process and causes bacterial regrowth and increases disinfection by-products (DBPs) formation during disinfection. BAC can offer many advantages by removing hydrophilic fraction and many toxic and endocrine compounds which are not otherwise removed. BAC can also aid the other downstream processes if used as a pre-treatment. Major drawback of BAC was longer empty bed contact time (EBCT) required for an effective NOM removal. This critical review analyses the strategies that have been adopted to enhance the biological activity of the carbon by operational means and summarises the surface modification methods. To maximize the benefit of the BAC, a rethink of current treatment plant configuration is proposed. If the process can be expedited and adopted appropriately, BAC can solve many of the current problems.
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Affiliation(s)
| | - Arumugam Sathasivan
- School of Computing, Engineering and Mathematics, Western Sydney University, NSW 2747, Australia.
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187
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Pan X, Wu W, Lü J, Chen Z, Li L, Rao W, Guan X. Biosorption and extraction of europium by Bacillus thuringiensis strain. INORG CHEM COMMUN 2017. [DOI: 10.1016/j.inoche.2016.11.012] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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188
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Nanofiber Ion-Exchange Membranes for the Rapid Uptake and Recovery of Heavy Metals from Water. MEMBRANES 2016; 6:membranes6040059. [PMID: 27999394 PMCID: PMC5192415 DOI: 10.3390/membranes6040059] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Revised: 12/12/2016] [Accepted: 12/15/2016] [Indexed: 11/17/2022]
Abstract
An evaluation of the performance of polyelectrolyte-modified nanofiber membranes was undertaken to determine their efficacy in the rapid uptake and recovery of heavy metals from impaired waters. The membranes were prepared by grafting poly(acrylic acid) (PAA) and poly(itaconic acid) (PIA) to cellulose nanofiber mats. Performance measurements quantified the dynamic ion-exchange capacity for cadmium (Cd), productivity, and recovery of Cd(II) from the membranes by regeneration. The dynamic binding capacities of Cd(II) on both types of nanofiber membrane were independent of the linear flow velocity, with a residence time of as low as 2 s. Analysis of breakthrough curves indicated that the mass flow rate increased rapidly at constant applied pressure after membranes approached equilibrium load capacity for Cd(II), apparently due to a collapse of the polymer chains on the membrane surface, leading to an increased porosity. This mechanism is supported by hydrodynamic radius (Rh) measurements for PAA and PIA obtained from dynamic light scattering, which show that Rh values decrease upon Cd(II) binding. Volumetric productivity was high for the nanofiber membranes, and reached 0.55 mg Cd/g/min. The use of ethylenediaminetetraacetic acid as regeneration reagent was effective in fully recovering Cd(II) from the membranes. Ion-exchange capacities were constant over five cycles of binding-regeneration.
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189
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Khan Z, Rehman A, Hussain SZ, Nisar MA, Zulfiqar S, Shakoori AR. Cadmium resistance and uptake by bacterium, Salmonella enterica 43C, isolated from industrial effluent. AMB Express 2016; 6:54. [PMID: 27491862 PMCID: PMC4974214 DOI: 10.1186/s13568-016-0225-9] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Accepted: 07/26/2016] [Indexed: 11/10/2022] Open
Abstract
Cadmium resistant bacterium, isolated from industrial wastewater, was characterized as Salmonella enterica 43C on the basis of biochemical and 16S rRNA ribotyping. It is first ever reported S. enterica 43C bared extreme resistance against heavy metal consortia in order of Pb(2+)>Cd(2+)>As(3+)>Zn(2+)>Cr(6+)>Cu(2+)>Hg(2+). Cd(2+) stress altered growth pattern of the bacterium in time dependent manner. It could remove nearly 57 % Cd(2+) from the medium over a period of 8 days. Kinetic and thermodynamic studies based on various adsorption isotherm models (Langmuir and Freundlich) depicted the Cd(2+) biosorption as spontaneous, feasible and endothermic in nature. Interestingly, the bacterium followed pseudo first order kinetics, making it a good biosorbent for heavy metal ions. The S. enterica 43C Cd(2+) processivity was significantly influenced by temperature, pH, initial Cd(2+) concentration, biomass dosage and co-metal ions. FTIR analysis of the bacterium revealed the active participation of amide and carbonyl moieties in Cd(2+) adsorption confirmed by EDX analysis. Electron micrographs beckoned further surface adsorption and increased bacterial size due to intracellular Cd(2+) accumulation. An overwhelming increase in glutathione and other non-protein thiols levels played a significant role in thriving oxidative stress generated by metal cations. Presence of metallothionein clearly depicted the role of such proteins in bacterial metal resistance mechanism. The present study results clearly declare S. enterica 43C a suitable candidate for green chemistry to bioremediate environmental Cd(2+).
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Affiliation(s)
- Zaman Khan
- Department of Microbiology and Molecular Genetics, University of the Punjab, New Campus, Lahore, 54590 Pakistan
| | - Abdul Rehman
- Department of Microbiology and Molecular Genetics, University of the Punjab, New Campus, Lahore, 54590 Pakistan
| | - Syed Z. Hussain
- Department of Chemistry, SBA School of Science and Engineering (SBASSE), Lahore University of Management Sciences (LUMS), DHA, Lahore Cantt, 54792 Pakistan
| | - Muhammad A. Nisar
- Department of Microbiology, Govt. College University Faislabad, Faislabad, Pakistan
| | - Soumble Zulfiqar
- School of Biological Sciences, University of the Punjab, New Campus, Lahore, 54590 Pakistan
| | - Abdul R. Shakoori
- School of Biological Sciences, University of the Punjab, New Campus, Lahore, 54590 Pakistan
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190
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Genetic analysis of arsenic metabolism in Micrococcus luteus BPB1, isolated from the Bengal basin. ANN MICROBIOL 2016. [DOI: 10.1007/s13213-016-1239-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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191
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Chowdhury S, Mazumder MAJ, Al-Attas O, Husain T. Heavy metals in drinking water: Occurrences, implications, and future needs in developing countries. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 569-570:476-488. [PMID: 27355520 DOI: 10.1016/j.scitotenv.2016.06.166] [Citation(s) in RCA: 355] [Impact Index Per Article: 44.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Revised: 06/18/2016] [Accepted: 06/20/2016] [Indexed: 05/27/2023]
Abstract
Heavy metals in drinking water pose a threat to human health. Populations are exposed to heavy metals primarily through water consumption, but few heavy metals can bioaccumulate in the human body (e.g., in lipids and the gastrointestinal system) and may induce cancer and other risks. To date, few thousand publications have reported various aspects of heavy metals in drinking water, including the types and quantities of metals in drinking water, their sources, factors affecting their concentrations at exposure points, human exposure, potential risks, and their removal from drinking water. Many developing countries are faced with the challenge of reducing human exposure to heavy metals, mainly due to their limited economic capacities to use advanced technologies for heavy metal removal. This paper aims to review the state of research on heavy metals in drinking water in developing countries; understand their types and variability, sources, exposure, possible health effects, and removal; and analyze the factors contributing to heavy metals in drinking water. This study identifies the current challenges in developing countries, and future research needs to reduce the levels of heavy metals in drinking water.
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Affiliation(s)
- Shakhawat Chowdhury
- Department of Civil and Environmental Engineering, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.
| | - M A Jafar Mazumder
- Department of Chemistry, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
| | - Omar Al-Attas
- Department of Civil and Environmental Engineering, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
| | - Tahir Husain
- Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, NL, Canada
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192
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Pandey SK, Singh P, Singh J, Sachan S, Srivastava S, Singh SK. Nanocarbon-based Electrochemical Detection of Heavy Metals. ELECTROANAL 2016. [DOI: 10.1002/elan.201600173] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Shailendra Kumar Pandey
- Department of Chemical Engineering; Motilal Nehru National Institute of Technology Allahabad; Allahabad- 211004 India
| | - Priti Singh
- Department of Biotechnology; Motilal Nehru National Institute of Technology Allahabad; Allahabad- 211004 India
| | - Jyoti Singh
- Department of Biotechnology; Motilal Nehru National Institute of Technology Allahabad; Allahabad- 211004 India
| | - Sadhana Sachan
- Department of Chemical Engineering; Motilal Nehru National Institute of Technology Allahabad; Allahabad- 211004 India
| | - Sameer Srivastava
- Department of Biotechnology; Motilal Nehru National Institute of Technology Allahabad; Allahabad- 211004 India
| | - Sunil Kumar Singh
- Department of Biotechnology; Motilal Nehru National Institute of Technology Allahabad; Allahabad- 211004 India
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193
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Xu H, Zhu B, Ren X, Shao D, Tan X, Chen C. Controlled synthesized natroalunite microtubes applied for cadmium(II) and phosphate co-removal. JOURNAL OF HAZARDOUS MATERIALS 2016; 314:249-259. [PMID: 27136730 DOI: 10.1016/j.jhazmat.2016.04.044] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Revised: 04/07/2016] [Accepted: 04/18/2016] [Indexed: 06/05/2023]
Abstract
Treatment of wastewater containing several kinds of contaminants poses great challenges, because heavy metal and inorganic anion contaminants possess different fate and transport mechanisms. Individual adsorption of Cd(II)/phosphate on clay or metallic oxides has been extensively investigated, but the mutual effects of these two species in co-existing systems have received little attention. In this study, five natroalunite samples with different morphologies were synthesized by a simple hydrothermal method with appropriate volume ratio of ethylene glycol (EG) to water. The volume ratio of EG to water plays a key role in the formation of natroalunite samples, and dramatically affects their adsorption capacities. The mutual effects of Cd(II) and phosphate on their interaction with natroalunite microtubes (NMs) were investigated by varying experimental conditions, such as pH, temperature and addition sequences. The results demonstrate that highly efficient co-removal of Cd(II) and phosphate can be accomplished using NMs, and the process is strongly dependent on solution pH and temperature via the formation of ternary surface complexes. This study implies that the hydrothermally synthesized NMs can be regarded as a potential promising material for the co-removal of Cd(II) and phosphate from large volumes of aqueous solutions in pollution management.
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Affiliation(s)
- Huan Xu
- School of Physics and Materials Science, Anhui University, Hefei 230601, PR China; Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei 230031, PR China
| | - Baisheng Zhu
- University of Science and Technology of China, Hefei 230026, PR China
| | - Xuemei Ren
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei 230031, PR China.
| | - Dadong Shao
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei 230031, PR China
| | - Xiaoli Tan
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei 230031, PR China
| | - Changlun Chen
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei 230031, PR China
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194
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Zahabi SR, Hosseini Ravandi SA, Allafchian A. Removal of nickel and cadmium heavy metals using nanofiber membranes functionalized with (3-mercaptopropyl)trimethoxysilane (TMPTMS). JOURNAL OF WATER AND HEALTH 2016; 14:630-639. [PMID: 27441858 DOI: 10.2166/wh.2016.267] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Functionalized nanofibrous membranes have been produced via electrospinning with a polymer solution of 19% (w/w) of nylon 66 prepared in a formic acid/chloroform mixture (75:25 v/v). The optimum parameters of electrospinning, like voltage, flow rate, tip and collector distances, were achieved and produced nanofiber membranes with a thickness of 287 nm. Then the nanofiber membranes were functionalized by (3-mercaptopropyl)trimethoxysilane (TMPTMS) at various amounts. Three different initial concentrations of metal ions and three different levels of pH were chosen. The effect of filtration process parameters such as the initial concentration of metal solution, pH of the solution, and the amount of functionalizer trimethoxysilane (TMPTMS) on the adsorption was studied. In surveying filtration process parameters, the results showed that metal ion rejection increased by increasing the pH of the solution and decreased by increasing the initial concentration of the effluent. By increasing the amount of functionalizer, removal efficiency increased. The results showed that the maximum efficiency of absorption of cadmium and nickel were 93.0 and 97.6%, respectively, and the filtering mechanism of the membrane is the blocking pores type. The adsorption data of cadmium and nickel ions fitted particularly well with the Freundlich isotherm.
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Affiliation(s)
- Saeed Reza Zahabi
- Department of Textile Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran E-mail:
| | | | - Alireza Allafchian
- Nanotechnology and Advanced Materials Institute (NAMI), Isfahan University of Technology, Isfahan 84156-83111, Iran
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195
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Senthil Kumar P, Saravanan A, Anish Kumar K, Yashwanth R, Visvesh S. Removal of toxic zinc from water/wastewater using eucalyptus seeds activated carbon: non-linear regression analysis. IET Nanobiotechnol 2016; 10:244-253. [PMID: 27463796 PMCID: PMC8676259 DOI: 10.1049/iet-nbt.2015.0087] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Revised: 12/03/2015] [Accepted: 12/14/2015] [Indexed: 11/14/2023] Open
Abstract
In the present study, a novel activated carbon was prepared from low-cost eucalyptus seeds, which was utilised for the effectively removal of toxic zinc from the water/wastewater. The prepared adsorbent was studied by Fourier transform infrared spectroscopy and scanning electron microscopic characterisation studies. Adsorption process was experimentally performed for optimising the influencing factors such as adsorbent dosage, solution pH, contact time, initial zinc concentration, and temperature for the maximum removal of zinc from aqueous solution. Adsorption isotherm of zinc removal was ensued Freundlich model, and the kinetic model ensued pseudo-second order model. Langmuir monolayer adsorption capacity of the adsorbent for zinc removal was evaluated as 80.37 mg/g. The results of the thermodynamic studies suggested that the adsorption process was exothermic, thermodynamically feasible and impulsive process. Finally, a batch adsorber was planned to remove zinc from known volume and known concentration of wastewater using best obeyed model such as Freundlich. The experimental details showed the newly prepared material can be effectively utilised as a cheap material for the adsorption of toxic metal ions from the contaminated water.
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Affiliation(s)
| | - Anbalagan Saravanan
- Department of Chemical Engineering, SSN College of Engineering, Chennai - 603110, India
| | - Kodyingil Anish Kumar
- Department of Chemical Engineering, SSN College of Engineering, Chennai - 603110, India
| | - Ramesh Yashwanth
- Department of Chemical Engineering, SSN College of Engineering, Chennai - 603110, India
| | - Sridharan Visvesh
- Department of Chemical Engineering, SSN College of Engineering, Chennai - 603110, India
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196
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Amininasab SM, Esmaili S, Taghavi M, Shami Z. Synthesis and characterization of new fluorinated photoactive polyamides based on xanthene pendant: Evaluation of antibacterial and heavy metal ions removal behavior. INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION 2016. [DOI: 10.1080/1023666x.2016.1207047] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
| | - Soheila Esmaili
- Department of Chemistry, Faculty of Science, University of Kurdistan, Sanandaj, Iran
| | - Mehdi Taghavi
- Polymer Chemistry Research Laboratory, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - Zahed Shami
- Department of Chemistry, Faculty of Science, University of Kurdistan, Sanandaj, Iran
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197
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Zhang D, Luo J, Lee ZMP, Gersberg RM, Liu Y, Tan SK, Ng WJ. Characterization of microbial communities in wetland mesocosms receiving caffeine-enriched wastewater. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:14526-14539. [PMID: 27068910 DOI: 10.1007/s11356-016-6586-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Accepted: 03/28/2016] [Indexed: 06/05/2023]
Abstract
A 454 high-throughput pyrosequencing approach was used to characterize the structures of microbial communities in wetland mesocosms receiving caffeine-enriched wastewater at a concentration of 250 μg L(-1). The removal efficiencies of caffeine in the planted beds (93.0 %) were significantly (p < 0.05) higher than those in the unplanted beds (81.4 %). Bacterial diversity was decreased by 25 and 22.4 %, respectively, in both planted and unplanted mesocosms after 210-day operation. The results of taxonomic analyses suggested that chronic exposure of wetland ecosystems to caffeine could lead to moderate shifts in microbial community composition. In total, 2156 operational taxonomic units (OTUs) were generated and 20 phyla comprising 260 genera were identified. The major phylogenetic groups at phylum level included Firmicutes (39 %), Actinobacteria (25.1 %), Proteobacteria (17.1 %), Synergistetes (5.6 %), and Chloroflexi (5.5 %). Bacilli and Synergistia increased in abundance in the planted mesocosms, while for the unplanted mesocosms, Actinobacterial, Clostridia and Betaproteobacteria exhibited increased proportion under the exposure of caffeine. At genus level, Propionibacterium, Staphylococcus, Bacillus, and Streptococcus were found to be increased in abundance after caffeine treatment. As for the response of fungal community to caffeine enrichment, genus like Cladosporium, Emericellopsis, Aspergillus, and Phoma were found to be resistant to caffeine disturbance. When compared to the microbial community between planted and unplanted mesocosms, a distinct community profile for both bacteria and fungi community was observed. The presence of plants had a remarkable effect on the structure of microbial community, helping buffer against the stress associated with caffeine exposure.
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Affiliation(s)
- Dongqing Zhang
- Advanced Environmental Biotechnology Center, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, No. 06-10, Singapore, 637141, Singapore
| | - Jinxue Luo
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, People' s Republic of China
- CAS.WEE (Beijing) Eco-Engineering Technology Institute Co., Ltd, Beijing, 100035, China
| | - Zarraz May Ping Lee
- Advanced Environmental Biotechnology Center, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, No. 06-10, Singapore, 637141, Singapore
| | - Richard M Gersberg
- Graduate School of Public Health, San Diego State University, Hardy Tower 119, 5500 Campanile, San Diego, CA, 92182-4162, USA
| | - Yu Liu
- Advanced Environmental Biotechnology Center, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, No. 06-10, Singapore, 637141, Singapore
- School of Civil and Environmental Engineering, Nanyang Technological University, N1-01a-29, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Soon Keat Tan
- Advanced Environmental Biotechnology Center, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, No. 06-10, Singapore, 637141, Singapore
- School of Civil and Environmental Engineering, Nanyang Technological University, N1-01a-29, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Wun Jern Ng
- Advanced Environmental Biotechnology Center, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, No. 06-10, Singapore, 637141, Singapore.
- School of Civil and Environmental Engineering, Nanyang Technological University, N1-01a-29, 50 Nanyang Avenue, Singapore, 639798, Singapore.
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198
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Zhao M, Xu Y, Zhang C, Rong H, Zeng G. New trends in removing heavy metals from wastewater. Appl Microbiol Biotechnol 2016; 100:6509-6518. [PMID: 27318819 DOI: 10.1007/s00253-016-7646-x] [Citation(s) in RCA: 137] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2016] [Revised: 05/22/2016] [Accepted: 05/24/2016] [Indexed: 12/13/2022]
Abstract
With the development of researches, the treatments of wastewater have reached a certain level. Whereas, heavy metals in wastewater cause special concern in recent times due to their recalcitrance and persistence in the environment. Therefore, it is important to get rid of the heavy metals in wastewater. The previous studies have provided many alternative processes in removing heavy metals from wastewater. This paper reviews the recent developments and various methods for the removal of heavy metals from wastewater. It also evaluates the advantages and limitations in application of these techniques. A particular focus is given to innovative removal processes including adsorption on abiological adsorbents, biosorption, and photocatalysis. Because these processes have leaded the new trends and attracted more and more researches in removing heavy metals from wastewater due to their high efficency, pluripotency and availability in a copious amount. In general, the applicability, characteristic of wastewater, cost-effectiveness, and plant simplicity are the key factors in selecting the most suitable method for the contaminated wastewater.
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Affiliation(s)
- Meihua Zhao
- Ministry of Education Key Laboratory of Water Quality Safety and Protection of the Pearl River Delta, Guangzhou University, Guangzhou, Guangdong, 510006, China
| | - Ying Xu
- Ministry of Education Key Laboratory of Water Quality Safety and Protection of the Pearl River Delta, Guangzhou University, Guangzhou, Guangdong, 510006, China
| | - Chaosheng Zhang
- Ministry of Education Key Laboratory of Water Quality Safety and Protection of the Pearl River Delta, Guangzhou University, Guangzhou, Guangdong, 510006, China.
| | - Hongwei Rong
- Ministry of Education Key Laboratory of Water Quality Safety and Protection of the Pearl River Delta, Guangzhou University, Guangzhou, Guangdong, 510006, China
| | - Guangming Zeng
- College of Environmental Science and Engineering, Hunan University, Changsha, Hunan, 410082, China
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199
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Cd-Resistant Strains of B. cereus S5 with Endurance Capacity and Their Capacities for Cadmium Removal from Cadmium-Polluted Water. PLoS One 2016; 11:e0151479. [PMID: 27077388 PMCID: PMC4831789 DOI: 10.1371/journal.pone.0151479] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Accepted: 02/29/2016] [Indexed: 12/24/2022] Open
Abstract
The goal of this study was to identify Cd-resistant bacterial strains with endurance capacity and to evaluate their ability to remove cadmium ions from cadmium-polluted water. The Bacillus cereusS5 strain identified in this study had the closest genetic relationship with B. cereus sp. Cp1 and performed well in the removal of Cd2+ions from solution. The results showed that both the live and dead biomasses of the Cd2+-tolerant B. cereus S5 strain could absorb Cd2+ ions in solution but that the live biomass of the B. cereus S5 strain outperformed the dead biomass at lower Cd2+concentrations. An analysis of the cadmium tolerance genes of B. cereus S5 identified ATPase genes that were associated with cadmium tolerance and involved in the ATP pumping mechanism. The FTIR spectra revealed the presence of amino, carboxyl and hydroxyl groups on the pristine biomass and indicated that the cadmium ion removal ability was related to the structure of the strain. The maximum absorption capacity of the B. cereus S5 strain in viable spore biomass was 70.16 mg/g (dry weight) based on a pseudo-second-order kinetic model fit to the experimental data. The Langmuir and Langmuir-Freundlich isotherm adsorption models fit the cadmium ion adsorption data well, and the kinetic curves indicated that the adsorption rate was second-order. For Cd2+ concentrations (mg/L) of 1–109 mg/L, good removal efficiency (>80%) was achieved using approximately 3.48–10.3 g/L of active spore biomass of the B. cereus S5 strain. A cadmium-tolerant bacteria-activated carbon-immobilized column could be used for a longer duration and exhibited greater treatment efficacy than the control column in the treatment of cadmium-polluted water. In addition, a toxicity assessment using mice demonstrated that the biomass of the B. cereus S5 strain and its fermentation products were non-toxic. Thus, the isolated B. cereus S5 strain can be considered an alternative biological adsorbent for use in emergency responses to severe cadmium pollution and in the routine treatment of trace cadmium pollution.
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200
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Verma N, Kaur G. Trends on Biosensing Systems for Heavy Metal Detection. BIOSENSORS FOR SUSTAINABLE FOOD - NEW OPPORTUNITIES AND TECHNICAL CHALLENGES 2016. [DOI: 10.1016/bs.coac.2016.04.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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