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Karadeniz SC, Isik B, Ugraskan V, Cakar F. Adsorptive removal of Safranine T dye from aqueous solutions using sodium alginate-Festuca arundinacea seeds bio-composite microbeads. Int J Biol Macromol 2023; 248:125880. [PMID: 37473894 DOI: 10.1016/j.ijbiomac.2023.125880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 07/10/2023] [Accepted: 07/17/2023] [Indexed: 07/22/2023]
Abstract
In this study, composite microbeads were prepared using Festuca arundinacea seeds and sodium alginate biopolymer at different ratios and utilized as sorbents for the sorption of Safranine T from wastewater. The sorbents were characterized by FTIR, SEM, XRD, and BET analysis. According to BET analysis, the specific surface area of the adsorbents was calculated to be 10.99 m2/g and the surface was found to be mesoporous. The optimum conditions for adsorption studies including initial pH (2-12), concentration (10-50 mg/L), contact time (0-150 min), and adsorbent mass (0.05 g/50 mL-0.25 g/50 mL) were determined at 25 °C. The raw data obtained from sorption tests were applied to Freundlich, Langmuir-1, Langmuir-2, Langmuir-3, Langmuir-4, Temkin, Toth, and Koble-Corrigan isotherm models. The best results were obtained from the Langmuir-2 and accordingly the qm values were calculated as 454.54, 833.33, and 625.00 mg/g for FA, FA-SA-20, and FA-SA-30 at 25 °C, respectively. Adsorption kinetic data illustrated that the process followed the PSO model. Reusability and desorption studies were performed for composite microbeads. Additionally, the thermodynamic studies were performed at 25, 35 and 45 °C. Considering all these results, it was seen that the FA-SA-20 composite had the highest adsorption capacity and the best desorption efficiency.
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Affiliation(s)
- Sabri Can Karadeniz
- Department of Chemistry, Faculty of Arts & Sciences, Yildiz Technical University, Esenler, Istanbul 34220, Turkey
| | - Birol Isik
- Department of Chemistry, Faculty of Arts & Sciences, Yildiz Technical University, Esenler, Istanbul 34220, Turkey
| | - Volkan Ugraskan
- Department of Chemistry, Faculty of Arts & Sciences, Yildiz Technical University, Esenler, Istanbul 34220, Turkey
| | - Fatih Cakar
- Department of Chemistry, Faculty of Arts & Sciences, Yildiz Technical University, Esenler, Istanbul 34220, Turkey.
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Alharbi RM, Sholkamy EN, Alsamhary KI, Abdel-Raouf N, Ibraheem IBM. Optimization Study of the Capacity of Chlorella vulgaris as a Potential Bio-Remediator for the Bio-Adsorption of Arsenic (III) from Aquatic Environments. TOXICS 2023; 11:toxics11050439. [PMID: 37235253 DOI: 10.3390/toxics11050439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Revised: 04/30/2023] [Accepted: 05/05/2023] [Indexed: 05/28/2023]
Abstract
This study examined the ability of the green microalgae Chlorella vulgaris to remove arsenic from aqueous solutions. A series of studies was conducted to determine the optimal conditions for biological arsenic elimination, including biomass amount, incubation time, initial arsenic level, and pH values. At 76 min, pH 6, 50 mgL-1 metal concentration, and 1 gL-1 bio-adsorbent dosage, the maximum removal of arsenic from an aqueous solution was 93%. The uptake of As (III) ions by C. vulgaris reached an equilibrium at 76 min of bio-adsorption. The maximum adsorptive rate of arsenic (III) by C. vulgaris was 55 mg/gm. The Langmuir, Freundlich, and Dubinin-Radushkevich equations were used to fit the experimental data. The best theoretical isotherm of Langmuir, Freundlich, or/and Dubinin-Radushkevich for arsenic bio-adsorption by Chlorella vulgaris was determined. To choose the best theoretical isotherm, the coefficient of correlation was used. The data on absorption appeared to be linearly consistent with the Langmuir (qmax = 45 mgg-1; R2 = 0.9894), Freundlich (kf = 1.44; R2 = 0.7227), and Dubinin-Radushkevich (qD-R = 8.7 mg/g; R2 = 0.951) isotherms. The Langmuir and Dubinin-Radushkevich isotherms were both good two-parameter isotherms. In general, Langmuir was demonstrated to be the most accurate model for As (III) bio-adsorption on the bio-adsorbent. Maximum bio-adsorption values and a good correlation coefficient were observed for the first-order kinetic model, indicating that it was the best fitting model and significant in describing the arsenic (III) adsorption process. SEM micrographs of treated and untreated algal cells revealed that ions adsorbed on the algal cell's surface. A Fourier-transform infrared spectrophotometer (FTIR) was used to analyze the functional groups in algal cells, such as the carboxyl group, hydroxyl, amines, and amides, which aided in the bio-adsorption process. Thus, C. vulgaris has great potential and can be found in eco-friendly biomaterials capable of adsorbing arsenic contaminants from water sources.
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Affiliation(s)
- Reem Mohammed Alharbi
- Department of Biology, College of Science, University of Hafr Al Batin, Hafr Al Batin 39524, Saudi Arabia
| | - Essam Nageh Sholkamy
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Khawla Ibrahim Alsamhary
- Department of Biology, College of Science and Humanities in Al-Kharj, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
| | - Neveen Abdel-Raouf
- Department of Biology, College of Science and Humanities in Al-Kharj, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
- Botany and Microbiology Department, Faculty of Science, Beni-Suef University, Salah Salem Street, Beni-Suef 62511, Egypt
| | - Ibraheem Borie M Ibraheem
- Botany and Microbiology Department, Faculty of Science, Beni-Suef University, Salah Salem Street, Beni-Suef 62511, Egypt
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Xie Y, Hu J, Esmaeili H, Wang D, Zhou Y. A review study on wastewater decontamination using nanotechnology: Performance, mechanism and environmental impacts. POWDER TECHNOL 2022. [DOI: 10.1016/j.powtec.2022.118023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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4
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Zhang H, Su L, Cheng C, Cheng H, Chang M, Liu F, Liu N, Oh K. A new type of calcium-rich biochars derived from spent mushroom substrates and their efficient adsorption properties for cationic dyes. Front Bioeng Biotechnol 2022; 10:1007630. [PMID: 36204471 PMCID: PMC9530940 DOI: 10.3389/fbioe.2022.1007630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Accepted: 09/02/2022] [Indexed: 12/07/2022] Open
Abstract
Adsorption is commonly accepted as a most promising strategy in dye wastewater treatment, and the widespread use of adsorption emphasizes the need to explore low-cost but excellent adsorbents. Herein, a low-cost adsorbent (calcium-rich biochar) was developed, which was directly pyrolyzed from spent mushroom substate without any modification. This study evaluated the potential application of two calcium-rich biochars (GSBC and LSBC) derived from spent substrates of Ganoderma lucidum and Lentinus edodes, respectively. The effects of pyrolysis temperature on the calcium-rich biochars characteristics and their adsorption mechanism for cationic dyes (Malachite Green oxalate (MG) and Safranine T (ST)) were studied systematically. The increase in pyrolysis temperature from 350 to 750 °C led to an increase in both biochar ash, Ca content, and specific surface area, which made high-temperature biochars (GS750 and LS750) the superior adsorbents for cationic dyes. Batch adsorption results showed LS750 was more efficient to adsorb dyes than GS750 attributed to its higher Ca content and larger specific surface area. According to the Langmuir model, LS750 had high adsorption capacities of 9,388.04 and 3,871.48 mg g−1 for Malachite green and ST, respectively. The adsorption mechanism of dye MG could be attributed to pore filling, hydrogen bonding, electrostatic interaction, ion exchange, and π-π stacking, while ST adsorption mainly involved pore filling, electrostatic interaction, ion exchange, and π-π stacking. Attributed to their excellent adsorption performance, cheap source, and good reusability, biochars obtained from SMSs were very promising in dyeing wastewater treatment.
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Affiliation(s)
- Haibo Zhang
- College of Resources and Environment, Shanxi Agricultural University, Taigu, China
- State Key Laboratory of Sustainable Dryland Agriculture (in preparation), Shanxi Agricultural University, Shanxi, Taiyuan, China
- Shanxi Key Laboratory of Edible Fungi for Loess Plateau, Taigu, China
| | - Long Su
- College of Resources and Environment, Shanxi Agricultural University, Taigu, China
| | - Caiping Cheng
- College of Basic Science, Shanxi Agricultural University, Taigu, China
| | - Hongyan Cheng
- College of Resources and Environment, Shanxi Agricultural University, Taigu, China
- *Correspondence: Hongyan Cheng, ; Mingchang Chang,
| | - Mingchang Chang
- College of Food Science and Engineering, Shanxi Agricultural University, Taigu, China
- Collaborative Innovation Center of Advancing Quality and Efficiency of Loess Plateau Edible Fungi, Taigu, China
- *Correspondence: Hongyan Cheng, ; Mingchang Chang,
| | - Fenwu Liu
- College of Resources and Environment, Shanxi Agricultural University, Taigu, China
- State Key Laboratory of Sustainable Dryland Agriculture (in preparation), Shanxi Agricultural University, Shanxi, Taiyuan, China
| | - Na Liu
- College of Resources and Environment, Shanxi Agricultural University, Taigu, China
| | - Kokyo Oh
- Center for Environmental Science in Saitama, Kazo, Japan
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Deng X, Luo D, Okamoto A. Defined and unknown roles of conductive nanoparticles for the enhancement of microbial current generation: A review. BIORESOURCE TECHNOLOGY 2022; 350:126844. [PMID: 35158034 DOI: 10.1016/j.biortech.2022.126844] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 02/06/2022] [Accepted: 02/08/2022] [Indexed: 06/14/2023]
Abstract
The ability of various bacteria to make use of solid substrates through extracellular electron transfer (EET) or extracellular electron uptake (EEU) has enabled the development of valuable biotechnologies such as microbial fuel cells (MFCs) and microbial electrosynthesis (MES). It is common practice to use metallic and semiconductive nanoparticles (NPs) for microbial current enhancement. However, the effect of NPs is highly variable between systems, and there is no clear guideline for effectively increasing the current generation. In the present review, the proposed mechanisms for enhancing current production in MFCs and MES are summarized, and the critical factors for NPs to enhance microbial current generation are discussed. Implications for microbially induced iron corrosion, where iron sulfide NPs are proposed to enhance the rate of EEU, photochemically driven MES, and several future research directions to further enhance microbial current generation, are also discussed.
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Affiliation(s)
- Xiao Deng
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Dan Luo
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan; Graduate School of Chemical Sciences and Engineering, Hokkaido University, North 13 West 8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan
| | - Akihiro Okamoto
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan; Graduate School of Chemical Sciences and Engineering, Hokkaido University, North 13 West 8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan.
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6
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Kumar M, Singh AK, Sikandar M. Biosorption of Hg (II) from aqueous solution using algal biomass: kinetics and isotherm studies. Heliyon 2020; 6:e03321. [PMID: 32042987 PMCID: PMC7000812 DOI: 10.1016/j.heliyon.2020.e03321] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 11/28/2019] [Accepted: 01/24/2020] [Indexed: 11/26/2022] Open
Abstract
The present work investigated the ability of algal biomass Chlorella vulgaris to remove mercury from aqueous solutions. The mercury biosorption process was studied through batch experiments 35 °C temperature with regard to the influence of contact time, initial mercury concentration, pH and desorption. The maximum adsorption capacity was registered at pH 6. The adsorption conduct of Hg(II) was defined by pseudo second order well rather pseudo first order as the experimental data (qe) come to an agreement with the calculated value. The kinetics of adsorption was fast and a high capacity of adsorption occurred within only 90 min. The adsorption data were signified by many models but Langmuir (qmax = 42. mg g−1) & Freundlich fitted well having regression coefficients near to unity. The thermodynamic parameters were also suited well as negative value of free energy cope up to spontaneity, positive value of the randomness described by ΔS attributed to affinity of Hg+2 towards algal bioadsorbant and high positive value of heat of enthalpy designates that the adsorption process is expected due to robust interactions between the Hg(II) ions and various functional groups on surface of algal bioadsorbant. Field emission scanning electron microscopy integrated with energy dispersive X-ray spectroscopy analysis before and after adsorption of Hg(II) reveals the adsorption of metallic ions over the surface. FTIR study supported the existence of various functional groups (carboxylix, amines, hydroxyls, amides etc.) helped in adsorption. Continuous adsorption desorption experiments proved that algal cells was excellent biosorbents with potential for further development.
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Affiliation(s)
- Mahendra Kumar
- Uttar Pradesh Pollution Control Board, Sadbhawna Nagar, Kanpur, Uttar Pradesh 208001, India
- Corresponding author.
| | - Alak Kumar Singh
- Department of Food Technology, Harcourt Butler Technical University, Nawabganj, Kanpur, Uttar Pradesh 208002, India
| | - Mohammad Sikandar
- Uttar Pradesh Pollution Control Board, Sadbhawna Nagar, Kanpur, Uttar Pradesh 208001, India
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7
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Li SL, Wang YJ, Chen YC, Liu SM, Yu CP. Chemical Characteristics of Electron Shuttles Affect Extracellular Electron Transfer: Shewanella decolorationis NTOU1 Simultaneously Exploiting Acetate and Mediators. Front Microbiol 2019; 10:399. [PMID: 30891020 PMCID: PMC6411715 DOI: 10.3389/fmicb.2019.00399] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Accepted: 02/15/2019] [Indexed: 01/16/2023] Open
Abstract
In the present study, we found that our isolate Shewanella decolorationis NTOU1 is able to degrade acetate under anaerobic condition with concomitant implementation of extracellular electron transfer (EET). With +0.63 V (vs. SHE) poised on the anode, in a 72-h experiment digesting acetate, only 2 mM acetate was consumed, which provides 6% of the electron equivalents derived from the initial substrate mass to support biomass (5%) and current generation (1%). To clarify the effects on EET of the addition of electron-shuttles, riboflavin, anthraquinone-2,6-disulfonate (AQDS), hexaammineruthenium, and hexacyanoferrate were selected to be spiked into the electrochemical cell in four individual experiments. It was found that the mediators with proton-associated characteristics (i.e., riboflavin and AQDS) would not enhance current generation, but the metal-complex mediators (i.e., hexaammineruthenium, and hexacyanoferrate) significantly enhanced current generation as the concentration increased. According to the results of electrochemical analyses, the i-V graphs represent that the catalytic current induced by the primitive electron shuttles started at the onset potential of −0.27 V and continued increasing until +0.73 V. In the riboflavin-addition experiment, the catalytic current initiated at the same potential but rapid saturated beyond −0.07 V; this indicated that the addition of riboflavin affects mediator secretion by S. decolorationis NTOU1. It was also found that the current was eliminated after adding 48 mM N-acetyl-L-methionine (i.e., the cytochrome inhibitor) when using acetate as a substrate, indicating the importance of outer-membrane cytochrome.
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Affiliation(s)
- Shiue-Lin Li
- Graduate Institute of Environmental Engineering, National Taiwan University, Taipei, Taiwan
| | - Yu-Jie Wang
- Graduate Institute of Environmental Engineering, National Taiwan University, Taipei, Taiwan
| | - Yu-Chun Chen
- Graduate Institute of Environmental Engineering, National Taiwan University, Taipei, Taiwan
| | - Shiu-Mei Liu
- Institute of Marine Biology, National Taiwan Ocean University, Keelung, Taiwan
| | - Chang-Ping Yu
- Graduate Institute of Environmental Engineering, National Taiwan University, Taipei, Taiwan
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8
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Yang Z, Fu S, Yan C, Yao J, Liu W. Hyper-cross-linked polymers based on triphenylsilane for hydrogen storage and water treatment. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2019. [DOI: 10.1080/10601325.2018.1559699] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Zhizhou Yang
- School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, People’s Republic of China
| | - Shuqing Fu
- School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, People’s Republic of China
| | - Cheng Yan
- School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, People’s Republic of China
| | - Jinshui Yao
- School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, People’s Republic of China
| | - Weiliang Liu
- School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, People’s Republic of China
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9
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Integrated adsorption and catalytic degradation of safranine T by a porous covalent triazine-based framework. J Colloid Interface Sci 2018; 532:1-11. [DOI: 10.1016/j.jcis.2018.07.113] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Revised: 07/25/2018] [Accepted: 07/25/2018] [Indexed: 11/19/2022]
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10
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Yuvaraja G, Prasad C, Vijaya Y, Subbaiah MV. Application of ZnO nanorods as an adsorbent material for the removal of As(III) from aqueous solution: kinetics, isotherms and thermodynamic studies. INTERNATIONAL JOURNAL OF INDUSTRIAL CHEMISTRY 2018. [DOI: 10.1007/s40090-018-0136-5] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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11
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Ali A, Haq IU, Akhtar J, Sher M, Ahmed N, Zia M. Synthesis of Ag-NPs impregnated cellulose composite material: its possible role in wound healing and photocatalysis. IET Nanobiotechnol 2017; 11:477-484. [PMID: 28530199 PMCID: PMC8676316 DOI: 10.1049/iet-nbt.2016.0086] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Revised: 08/04/2016] [Accepted: 08/15/2016] [Indexed: 12/18/2023] Open
Abstract
Cellulose is the natural biopolymer normally used as supporting agent with enhanced applicability and properties. In present study, cellulose isolated from citrus waste is used for silver nanoparticles (Ag-NPs) impregnation by a simple and reproducible method. The Ag-NPs fabricated cellulose (Ag-Cel) was characterised by powder X-rays diffraction, Fortier transform infrared spectroscopy and scanning electron microscopy. The thermal stability was studied by thermo-gravimetric analysis. The antibacterial activity performed by disc diffusion assay reveals good zone of inhibition against Staphylococcus aureus and Escherichia coli by Ag-Cel as compared Ag-NPs. The discs also displayed more than 90% reduction of S. aureus culture in broth within 150 min. The Ag-Cel discs also demonstrated minor 2,2-diphenyl 1-picryl-hydrazyl radical scavenging activity and total reducing power ability while moderate total antioxidant potential was observed. Ag-Cel effectively degrades methylene-blue dye up to 63.16% under sunlight irradiation in limited exposure time of 60 min. The Ag-NPs impregnated cellulose can be effectively used in wound dressing to prevent bacterial attack and scavenger of free radicals at wound site, and also as filters for bioremediation and wastewater purification.
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Affiliation(s)
- Attarad Ali
- Department of Biotechnology, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Ihsan Ul Haq
- Department of Pharmacy, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Javeed Akhtar
- Polymers and Materials Synthesis (PMS) Laboratory, Department of Physics, COMSATS Institute of Information Technology, 44000 Islamabad, Pakistan
| | - Muhammad Sher
- Department of chemistry, Science Complex, Alama Iqbal Open University, H-8 Islamabad, Pakistan
| | - Naveed Ahmed
- Department of Pharmacy, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Muhammad Zia
- Department of Biotechnology, Quaid-i-Azam University, Islamabad 45320, Pakistan.
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12
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Size- and shape-controlled synthesis of well-organised carbon nanotubes using nanoporous anodic alumina with different pore diameters. J Colloid Interface Sci 2017; 491:375-389. [DOI: 10.1016/j.jcis.2016.12.035] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 12/11/2016] [Accepted: 12/13/2016] [Indexed: 12/19/2022]
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13
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Bagheri AR, Ghaedi M, Asfaram A, Hajati S, Ghaedi AM, Bazrafshan A, Rahimi MR. Modeling and optimization of simultaneous removal of ternary dyes onto copper sulfide nanoparticles loaded on activated carbon using second-derivative spectrophotometry. J Taiwan Inst Chem Eng 2016. [DOI: 10.1016/j.jtice.2016.05.004] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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14
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An experimental and kinetic study of toluene oxidation over LaMn1−x B x O3 and La0.8A0.2Mn0.3B0.7O3 (A=Sr, Ce and B=Cu, Fe) nano-perovskite catalysts. KOREAN J CHEM ENG 2016. [DOI: 10.1007/s11814-016-0108-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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15
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Subbaiah MV, Kim DS. Adsorption of methyl orange from aqueous solution by aminated pumpkin seed powder: Kinetics, isotherms, and thermodynamic studies. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2016; 128:109-117. [PMID: 26921544 DOI: 10.1016/j.ecoenv.2016.02.016] [Citation(s) in RCA: 107] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 02/01/2016] [Accepted: 02/02/2016] [Indexed: 06/05/2023]
Abstract
Present research discussed the utilization of aminated pumpkin seed powder (APSP) as an adsorbent for methyl orange (MO) removal from aqueous solution. Batch sorption experiments were carried to evaluate the influence of pH, initial dye concentration, contact time, and temperature. The APSP was characterized by using Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscopy (SEM). The experimental equilibrium adsorption data were fitted using two two-parameter models (Langmuir and Freundlich) and two three-parameter models (Sips and Toth). Langmuir and Sips isotherms provided the best model for MO adsorption data. The maximum monolayer sorption capacity was found to be 200.3mg/g based on the Langmuir isotherm model. The pseudo-first-order and pseudo-second-order model equations were used to analyze the kinetic data of the adsorption process and the data was fitted well with the pseudo-second-order kinetic model (R(2)>0.97). The calculated thermodynamic parameters such as ΔG(0), ΔH(0) and ΔS(0) from experimental data showed that the sorption of MO onto APSP was feasible, spontaneous and endothermic in the temperature range 298-318 K. The FTIR results revealed that amine and carboxyl functional groups present on the surface of APSP. The SEM results show that APSP has an irregular and porous surface which is adequate morphology for dye adsorption. Desorption experiments were carried to explore the feasibility of adsorbent regeneration and the adsorbed MO from APSP was desorbed using 0.1M NaOH with an efficiency of 93.5%. Findings of the present study indicated that APSP can be successfully used for removal of MO from aqueous solution.
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Affiliation(s)
- Munagapati Venkata Subbaiah
- Department of Environmental Science and Engineering, Ewha Womans University, 11-1 Daehyun-Dong, Seodaemun-Gu, Seoul 120-750, Korea
| | - Dong-Su Kim
- Department of Environmental Science and Engineering, Ewha Womans University, 11-1 Daehyun-Dong, Seodaemun-Gu, Seoul 120-750, Korea.
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16
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Iben Nasser I, Algieri C, Garofalo A, Drioli E, Ahmed C, Donato L. Hybrid imprinted membranes for selective recognition of quercetin. Sep Purif Technol 2016. [DOI: 10.1016/j.seppur.2016.03.015] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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17
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Kamaraj R, Vasudevan S. Facile one-pot electrosynthesis of Al(OH)3 – kinetics and equilibrium modeling for adsorption of 2,4,5-trichlorophenoxyacetic acid from aqueous solution. NEW J CHEM 2016. [DOI: 10.1039/c5nj02407b] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nanosized Al(OH)3 was prepared by a simple, cheap, and eco-friendly method. The electrocoagulant is active for the adsorption of herbicides from water.
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18
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Asfaram A, Ghaedi M, Azqhandi MHA, Goudarzi A, Dastkhoon M. Statistical experimental design, least squares-support vector machine (LS-SVM) and artificial neural network (ANN) methods for modeling the facilitated adsorption of methylene blue dye. RSC Adv 2016. [DOI: 10.1039/c6ra01874b] [Citation(s) in RCA: 144] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
This study is based on the usage of a composite of zinc sulfide nanoparticles with activated carbon (ZnS-NPs-AC) for the adsorption of methylene blue (MB) from aqueous solutions.
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Affiliation(s)
- A. Asfaram
- Chemistry Department
- Yasouj University
- Yasouj 75918-74831
- Iran
| | - M. Ghaedi
- Chemistry Department
- Yasouj University
- Yasouj 75918-74831
- Iran
| | - M. H. Ahmadi Azqhandi
- Applied Chemistry Department
- Faculty of Gas and Petroleum (Gachsaran)
- Yasouj University
- Gachsaran
- Iran
| | - A. Goudarzi
- Department of Polymer Engineering
- Golestan University
- Gorgan
- Iran
| | - M. Dastkhoon
- Chemistry Department
- Yasouj University
- Yasouj 75918-74831
- Iran
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Sorption of phenol from waters on activated carbon impregnated with iron oxide, aluminum oxide and titanium oxide. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2015.08.044] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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Bagheripour E, Moghadassi AR, Hosseini SM. Fabrication of polyvinyl chloride based nanocomposite nanofiltration membrane: investigation of SDS/Al2O3nanoparticle concentration and solvent ratio effects. ASIA-PAC J CHEM ENG 2015. [DOI: 10.1002/apj.1918] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- E. Bagheripour
- Department of Chemical Engineering, Faculty of Engineering; Arak University; Arak 38156-8-8349 Iran
| | - A. R. Moghadassi
- Department of Chemical Engineering, Faculty of Engineering; Arak University; Arak 38156-8-8349 Iran
| | - S. M. Hosseini
- Department of Chemical Engineering, Faculty of Engineering; Arak University; Arak 38156-8-8349 Iran
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21
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Enhanced adsorption of phenols from liquids by aluminum oxide/carbon nanotubes: Comprehensive study from synthesis to surface properties. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2015.02.028] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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22
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Ihsanullah, Al-Khaldi FA, Abusharkh B, Khaled M, Atieh MA, Nasser M, laoui T, Saleh TA, Agarwal S, Tyagi I, Gupta VK. Adsorptive removal of cadmium(II) ions from liquid phase using acid modified carbon-based adsorbents. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2015.01.033] [Citation(s) in RCA: 120] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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23
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Pinto da Costa J, Girão AV, Monteiro OC, Trindade T, Costa MC. Biotechnologically obtained nanocomposites: A practical application for photodegradation of Safranin-T under UV-Vis and solar light. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2015; 50:996-1010. [PMID: 26121015 DOI: 10.1080/10934529.2015.1038155] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
This research was undertaken to determine the potential of biologically obtained ZnS-TiO2 nanocomposites to be used as catalysts in the photodegradation of organic pollutants, namely, Safranin-T. The photocatalysts were prepared by modifying the surface of commercial TiO2 particles with naturally produced ZnS, using sulfide species produced by sulfate-reducing bacteria and metal contaminated wastewaters. Comparative studies using powder X-ray diffraction (XRD) and scanning electron microscopy (SEM), prior and after photodegradation, were carried out in order to monitor possible structural and morphological changes on the particles. Adsorption properties and specific areas were determined by the Brunauer-Emmet-Teller (BET) method. The final solutions were characterized by UV-Vis and chemical oxygen demand (COD) content in order to determine Safranin-T concentration and toxicity. The influence of the catalyst amount, initial pH and dye concentration was also evaluated. Finally, the efficiency of the precipitates as catalysts in sunlight-mediated photodegradation was investigated, performing two scale experiments by using different volumes of dye-contaminated water (150 mL and 10 L). All tested composites showed potential to be used as photocatalysts for the degradation of Safranin-T, although the ZnS-TiO2_0.06 composite (0.06 g of TiO2 per 50 mL of the zinc solution) was the most effective. This substantiates the applicability of these biologically obtained materials as efficient photocatalysts for the degradation of organic pollutants, in laboratorial conditions and under direct sunlight.
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Affiliation(s)
- João Pinto da Costa
- a Department of Chemistry and Pharmacy, University of the Algarve, Campus Gambelas , Faro , Portugal
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Saleh TA, Gupta VK. Processing methods, characteristics and adsorption behavior of tire derived carbons: a review. Adv Colloid Interface Sci 2014; 211:93-101. [PMID: 25001042 DOI: 10.1016/j.cis.2014.06.006] [Citation(s) in RCA: 344] [Impact Index Per Article: 34.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2014] [Revised: 06/04/2014] [Accepted: 06/11/2014] [Indexed: 10/25/2022]
Abstract
The remarkable increase in the number of vehicles worldwide; and the lack of both technical and economical mechanisms of disposal make waste tires to be a serious source of pollution. One potential recycling process is pyrolysis followed by chemical activation process to produce porous activated carbons. Many researchers have recently proved the capability of such carbons as adsorbents to remove various types of pollutants including organic and inorganic species. This review attempts to compile relevant knowledge about the production methods of carbon from waste rubber tires. The effects of various process parameters including temperature and heating rate, on the pyrolysis stage; activation temperature and time, activation agent and activating gas are reviewed. This review highlights the use of waste-tires derived carbon to remove various types of pollutants like heavy metals, dye, pesticides and others from aqueous media.
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Artificial neural network optimization for removal of hazardous dye Eosin Y from aqueous solution using Co2O3-NP-AC: Isotherm and kinetics study. J IND ENG CHEM 2014. [DOI: 10.1016/j.jiec.2013.11.027] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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26
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Carbonaceous adsorbent prepared from waste tires: Experimental and computational evaluations of organic dye methyl orange. J Mol Liq 2014. [DOI: 10.1016/j.molliq.2013.11.028] [Citation(s) in RCA: 91] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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27
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Utilization to Remove Pb (II) Ions from Aqueous Environments Using Waste Fish Bones by Ion Exchange. J CHEM-NY 2014. [DOI: 10.1155/2014/739273] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Removal of lead (II) from aqueous solutions was studied by using pretreated fish bones as natural, cost-effective, waste sorbents. The effect of pH, contact time, temperature, and metal concentration on the adsorption capacities of the adsorbent was investigated. The maximum adsorption capacity for Pb (II) was found to be 323 mg/g at optimum conditions. The experiments showed that when pH increased, an increase in the adsorbed amount of metal of the fish bones was observed. The kinetic results of adsorption obeyed a pseudo second-order model. Freundlich and Langmuir isotherm models were applied to experimental equilibrium data of Pb (II) adsorption and the value ofRLfor Pb (II) was found to be 0.906. The thermodynamic parameters related to the adsorption process such asEa,ΔG°,ΔH°, andΔS° were calculated andEa,ΔH°, andΔS° were found to be 7.06, 46.01 kJ mol−1, and 0.141 kJ mol−1K−1for Pb (III), respectively.ΔH° values (46.01 kJmol−1) showed that the adsorption mechanism was endothermic. Weber-Morris and Urano-Tachikawa diffusion models were also applied to the experimental equilibrium data. The fish bones were effectively used as sorbent for the removal of Pb (II) ions from aqueous solutions.
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Al-Saadi AA, Saleh TA, Gupta VK. Spectroscopic and computational evaluation of cadmium adsorption using activated carbon produced from rubber tires. J Mol Liq 2013. [DOI: 10.1016/j.molliq.2013.09.036] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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29
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Sharma S, Kothiyal NC. Use of activated dry flowers (ADF) of Alstonia Scholaris for chromium (Vl) removal: equilibrium, kinetics and thermodynamics studies. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2013; 20:8986-8995. [PMID: 23757027 DOI: 10.1007/s11356-013-1853-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2013] [Accepted: 05/21/2013] [Indexed: 06/02/2023]
Abstract
In this study, a natural adsorbent (activated dry flowers (ADF)) was prepared from plant-derived waste biomass by chemical activation and employed for chromium (VI) removal from aqueous medium using experimental batch technique. Experiments were carried out as function of adsorbent dosage, pH, and contact time. The maximum chromium (Vl) removal was observed at initial pH 3 (~94 % removal). The equilibrium data was fitted well to Langmuir isotherm. The adsorption capacity of ADF was found to be 4.40 (mg chromium (Vl)/g) which was comparable to the adsorption capacity of some other adsorbents documented. Among various kinetic models applied, pseudo second-order model was found to explain the kinetics of chromium (VI) adsorption most effectively (R (2) >0.99). Thermodynamic parameters such as ΔG, ΔS, and ΔH shows that adsorption process was spontaneous and endothermic at all the concentration ranges studied. Desorption of chromium (Vl) with 2 N NaOH was effective (~71 %) and, hence, there exists the possibility of recycling the ADF. The major advantages of using ADF as an adsorbent are due to its effectiveness in reducing the concentration of chromium (Vl) to very low levels. It requires little processing and is reversible as well as eco-friendly in contrast to traditional methods.
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Affiliation(s)
- Sumit Sharma
- Department of Chemistry, Dr B R Ambedkar National Institute of Technology, Jalandhar, 144011, Punjab, India
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Manoj Kumar Reddy P, Mahammadunnisa S, Ramaraju B, Sreedhar B, Subrahmanyam C. Low-cost adsorbents from bio-waste for the removal of dyes from aqueous solution. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2013; 20:4111-4124. [PMID: 23233187 DOI: 10.1007/s11356-012-1360-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2012] [Accepted: 11/21/2012] [Indexed: 06/01/2023]
Abstract
Activated carbons (ACs) were developed from bio-waste materials like rice husk and peanut shell (PS) by various physicochemical activation methods. PS char digested in nitric acid followed by treatment at 673 K resulted in high surface area up to ∼585 m(2)/g. The novelty of the present study is the identification of oxygen functional groups formed on the surface of activated carbons by infrared and X-ray photoelectron spectroscopy and quantification by using temperature programmed decomposition (TPD). Typical TPD data indicated that each activation method may lead to varying amounts of acidic and basic functional groups on the surface of the adsorbent, which may be a crucial factor in determining the adsorption capacity. It was shown that ACs developed during the present study are good adsorbents, especially for the removal of a model textile dye methylene blue (MB) from aqueous solution. As MB is a basic dye, H(2)O(2)-treated rice husk showed the best adsorption capacity, which is in agreement with the acidic groups present on the surface. Removal of the dye followed Langmuir isotherm model, whereas MB adsorption on ACs followed pseudo-second-order kinetics.
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Affiliation(s)
- P Manoj Kumar Reddy
- Department of Chemistry, Indian Institute of Technology, Hyderabad, 502205, India
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31
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Gupta VK, Saleh TA. Sorption of pollutants by porous carbon, carbon nanotubes and fullerene- an overview. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2013; 20:2828-43. [PMID: 23430732 DOI: 10.1007/s11356-013-1524-1] [Citation(s) in RCA: 480] [Impact Index Per Article: 43.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2012] [Accepted: 01/25/2013] [Indexed: 05/19/2023]
Abstract
The quality of water is continuously deteriorating due to its increasing toxic threat to humans and the environment. It is imperative to perform treatment of wastewater in order to remove pollutants and to get good quality water. Carbon materials like porous carbon, carbon nanotubes and fullerene have been extensively used for advanced treatment of wastewaters. In recent years, carbon nanomaterials have become promising adsorbents for water treatment. This review attempts to compile relevant knowledge about the adsorption activities of porous carbon, carbon nanotubes and fullerene related to various organic and inorganic pollutants from aqueous solutions. A detailed description of the preparation and treatment methods of porous carbon, carbon nanotubes and fullerene along with relevant applications and regeneration is also included.
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Affiliation(s)
- Vinod K Gupta
- Chemistry Department, Indian Institute of Technology Roorkee, Roorkee 247667, India.
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Nidheesh PV, Gandhimathi R, Ramesh ST. Degradation of dyes from aqueous solution by Fenton processes: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2013; 20:2099-132. [PMID: 23338990 DOI: 10.1007/s11356-012-1385-z] [Citation(s) in RCA: 277] [Impact Index Per Article: 25.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2012] [Accepted: 11/29/2012] [Indexed: 05/26/2023]
Abstract
Several industries are using dyes as coloring agents. The effluents from these industries are increasingly becoming an environmental problem. The removal of dyes from aqueous solution has a great potential in the field of environmental engineering. This paper reviews the classification, characteristics, and problems of dyes in detail. Advantages and disadvantages of different methods used for dye removal are also analyzed. Among these methods, Fenton process-based advanced oxidation processes are an emerging prospect in the field of dye removal. Fenton processes have been classified and represented as "Fenton circle". This paper analyzes the recent studies on Fenton processes. The studies include analyzing different configurations of reactors used for dye removal, its efficiency, and the effects of various operating parameters such as pH, catalyst concentration, H2O2 concentration, initial dye concentration, and temperature of Fenton processes. From the present study, it can be conclude that Fenton processes are very effective and environmentally friendly methods for dye removal.
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Affiliation(s)
- Puthiya Veetil Nidheesh
- Department of Civil Engineering, National Institute of Technology, Tiruchirappalli, Tamil Nadu, India
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Adsorption of hazardous dye Eosin Yellow from aqueous solution onto waste material De-oiled Soya: Isotherm, kinetics and bulk removal. J Mol Liq 2013. [DOI: 10.1016/j.molliq.2012.11.032] [Citation(s) in RCA: 165] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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34
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Boopathy R, Karthikeyan S, Mandal AB, Sekaran G. Adsorption of ammonium ion by coconut shell-activated carbon from aqueous solution: kinetic, isotherm, and thermodynamic studies. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2013; 20:533-542. [PMID: 22562341 DOI: 10.1007/s11356-012-0911-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2012] [Accepted: 04/02/2012] [Indexed: 05/31/2023]
Abstract
Ammonium ions are one of the most encountered nitrogen species in polluted water bodies. High level of ammonium ion in aqueous solution imparts unpleasant taste and odor problems, which can interfere with the life of aquatics and human population when discharged. Many chemical methods are developed and being used for removal of ammonium ion from aqueous solution. Among various techniques, adsorption was found to be the most feasible and environmentally friendly with the use of natural-activated adsorbents. Hence, in this study, coconut shell-activated carbon (CSAC) was prepared and used for the removal of ammonium ion by adsorption techniques. Ammonium chloride (analytical grade) was purchased from Merck Chemicals for adsorption studies. The CSAC was used to adsorb ammonium ions under stirring at 100 rpm, using orbital shaker in batch experiments. The concentration of ammonium ion was estimated by ammonia distillate, using a Buchi distillation unit. The influence of process parameters such as pH, temperature, and contact time was studied for adsorption of ammonium ion, and kinetic, isotherm models were validated to understand the mechanism of adsorption of ammonium ion by CSAC. Thermodynamic properties such as ∆G, ∆H, and ∆S were determined for the ammonium adsorption, using van't Hoff equation. Further, the adsorption of ammonium ion was confirmed through instrumental analyses such as SEM, XRD, and FTIR. The optimum conditions for the effective adsorption of ammonium ion onto CSAC were found to be pH 9.0, temperature 283 K, and contact time 120 min. The experimental data was best followed by pseudosecond order equation, and the adsorption isotherm model obeyed the Freundlich isotherm. This explains the ammonium ion adsorption onto CSAC which was a multilayer adsorption with intraparticle diffusion. Negative enthalpy confirmed that this adsorption process was exothermic. The instrumental analyses confirmed the adsorption of ammonium ion onto CSAC.
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Affiliation(s)
- Ramasamy Boopathy
- Environmental Technology Division, Council of Scientific & Industrial Research-Central Leather Research Institute, Adyar, Chennai, 600 020 Tamil Nadu, India.
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Saravanan R, Karthikeyan S, Gupta VK, Sekaran G, Narayanan V, Stephen A. Enhanced photocatalytic activity of ZnO/CuO nanocomposite for the degradation of textile dye on visible light illumination. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:91-8. [PMID: 25428048 DOI: 10.1016/j.msec.2012.08.011] [Citation(s) in RCA: 453] [Impact Index Per Article: 41.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2012] [Revised: 07/21/2012] [Accepted: 08/07/2012] [Indexed: 11/15/2022]
Abstract
The photocatalytic degradation of organic dyes such as methylene blue and methyl orange in the presence of various percentages of composite catalyst under visible light irradiation was carried out. The catalyst ZnO nanorods and ZnO/CuO nanocomposites of different weight ratios were prepared by new thermal decomposition method, which is simple and cost effective. The prepared catalysts were characterized by different techniques such as X-ray diffraction, transmission electron microscopy, field emission scanning electron microscopy, Fourier transform infrared spectroscopy and UV-visible absorption spectroscopy. Further, the most photocatalytically active composite material was used for degradation of real textile waste water under visible light illumination. The irradiated samples were analysed by total organic carbon and chemical oxygen demand. The efficiency of the catalyst and their photocatalytic mechanism has been discussed in detail.
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Affiliation(s)
- R Saravanan
- Materials science centre, Department of Nuclear Physics, University of Madras, Guindy Campus, Chennai 600 025, India
| | - S Karthikeyan
- Environmental technology division, Central Leather Research Institute, Adyar, Chennai 600 020, India
| | - V K Gupta
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247 667, India; King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
| | - G Sekaran
- Environmental technology division, Central Leather Research Institute, Adyar, Chennai 600 020, India
| | - V Narayanan
- Department of Inorganic Chemistry, University of Madras, Guindy Campus, Chennai 600 025, India
| | - A Stephen
- Materials science centre, Department of Nuclear Physics, University of Madras, Guindy Campus, Chennai 600 025, India.
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Badruddoza AZM, Shawon ZBZ, Tay WJD, Hidajat K, Uddin MS. Fe3O4/cyclodextrin polymer nanocomposites for selective heavy metals removal from industrial wastewater. Carbohydr Polym 2012; 91:322-32. [PMID: 23044139 DOI: 10.1016/j.carbpol.2012.08.030] [Citation(s) in RCA: 286] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2012] [Revised: 08/02/2012] [Accepted: 08/08/2012] [Indexed: 11/26/2022]
Abstract
In this work, carboxymethyl-β-cyclodextrin (CM-β-CD) polymer modified Fe(3)O(4) nanoparticles (CDpoly-MNPs) was synthesized for selective removal of Pb(2+), Cd(2+), Ni(2+) ions from water. This magnetic adsorbent was characterized by TEM, FTIR, XPS and VSM. The adsorption of all studied metal ions onto CDpoly-MNPs was found to be dependent on pH, ionic strength, and temperature. Batch adsorption equilibrium was reached in 45 min and maximum uptakes for Pb(2+), Cd(2+) and Ni(2+) in non-competitive adsorption mode were 64.5, 27.7 and 13.2 mg g(-1), respectively at 25 °C. Adsorption data were fitted well to Langmuir isotherm and pseudo-second-order models for kinetic study. The polymer grafted on MNPs enhanced the adsorption capacity because of the complexing abilities of the multiple hydroxyl and carboxyl groups in polymer backbone with metal ions. In competitive adsorption experiments, CDpoly-MNPs could preferentially adsorb Pb(2+) ions with an affinity order of Pb(2+)>>Cd(2+)>Ni(2+) which can be explained by hard and soft acids and bases (HASB) theory. Furthermore, we explored the recyclability of CDpoly-MNPs.
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Affiliation(s)
- Abu Zayed M Badruddoza
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117576, Singapore.
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Karthikeyan S, Ezhil Priya M, Boopathy R, Velan M, Mandal AB, Sekaran G. Heterocatalytic Fenton oxidation process for the treatment of tannery effluent: kinetic and thermodynamic studies. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2012; 19:1828-1840. [PMID: 22207236 DOI: 10.1007/s11356-011-0691-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2011] [Accepted: 12/01/2011] [Indexed: 05/31/2023]
Abstract
UNLABELLED BACKGROUND, AIM, SCOPE: Treatment of wastewater has become significant with the declining water resources. The presence of recalcitrant organics is the major issue in meeting the pollution control board norms in India. The theme of the present investigation was on partial or complete removal of pollutants or their transformation into less toxic and more biodegradable products by heterogeneous Fenton oxidation process using mesoporous activated carbon (MAC) as the catalyst. MATERIALS AND METHODS Ferrous sulfate (FeSO(4)·7H(2)O), sulfuric acid (36 N, specific gravity 1.81, 98% purity), hydrogen peroxide (50% v/v) and all other chemicals used in this study were of analytical grade (Merck). Two reactors, each of height 50 cm and diameter 6 cm, were fabricated with PVC while one reactor was packed with MAC of mass 150 g and other without MAC served as control. RESULTS AND DISCUSSION The oxidation process was presented with kinetic and thermodynamic constants for the removal of COD, BOD, and TOC from the wastewater. The activation energy (Ea) for homogeneous and heterogeneous Fenton oxidation processes were 44.79 and 25.89 kJ/mol, respectively. The thermodynamic parameters ΔG, ΔH, and ΔS were calculated for the oxidation processes using Van't Hoff equation. Furthermore, the degradation of organics was confirmed through FTIR and UV-visible spectroscopy, and cyclic voltammetry. CONCLUSIONS The heterocatalytic Fenton oxidation process efficiently increased the biodegradability index (BOD/COD) of the tannery effluent. The optimized conditions for the heterocatalytic Fenton oxidation of organics in tannery effluent were pH 3.5, reaction time-4 h, and H(2)O(2)/FeSO(4)·7H(2)O in the molar ratio of 2:1.
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Affiliation(s)
- S Karthikeyan
- Environmental Technology Division, Council of Scientific & Industrial Research, Central Leather Research Institute, Adyar, Chennai, India.
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Ahmad T, Danish M, Rafatullah M, Ghazali A, Sulaiman O, Hashim R, Ibrahim MNM. The use of date palm as a potential adsorbent for wastewater treatment: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2012; 19:1464-1484. [PMID: 22207239 DOI: 10.1007/s11356-011-0709-8] [Citation(s) in RCA: 88] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2011] [Accepted: 12/15/2011] [Indexed: 05/31/2023]
Abstract
BACKGROUND In tropical countries, the palm tree is one of the most abundant and important trees. Date palm is a principal fruit grown in many regions of the world. It is abundant, locally available and effective material that could be used as an adsorbent for the removal of different pollutants from aqueous solution. REVIEW This article presents a review on the role of date palm as adsorbents in the removal of unwanted materials such as acid and basic dyes, heavy metals, and phenolic compounds. Many studies on adsorption properties of various low cost adsorbent, such as agricultural waste and activated carbons based on agricultural waste have been reported in recent years. CONCLUSION Studies have shown that date palm-based adsorbents are the most promising adsorbents for removing unwanted materials. No previous review is available where researchers can get an overview of the adsorption capacities of date palm-based adsorbent used for the adsorption of different pollutants. This review provides the recent literature demonstrating the usefulness of date palm biomass-based adsorbents in the adsorption of various pollutants.
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Affiliation(s)
- Tanweer Ahmad
- School of Industrial Technology, Universiti Sains Malaysia, Penang, Malaysia.
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Saleh TA, Gupta VK. Column with CNT/magnesium oxide composite for lead(II) removal from water. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2012; 19:1224-8. [PMID: 22124802 DOI: 10.1007/s11356-011-0670-6] [Citation(s) in RCA: 225] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2011] [Accepted: 11/14/2011] [Indexed: 05/13/2023]
Abstract
BACKGROUND In this study, manganese dioxide-coated multiwall carbon nanotube (MnO(2)/CNT) nanocomposite has been successfully synthesized. METHODS The as-produced nanocomposite was characterized by different characteristic tools, such as X-ray diffraction, SEM, and FTIR. The MnO(2)/CNT nanocomposite was utilized as a fixed bed in a column system for removal of lead(II) from water. The experimental conditions were investigated and optimized. The pH range between 3 and 7 was studied; the optimum removal was found when the pH was equal to 6 and 7. The thickness of MnO(2)/CNT nanocomposite compact layer was also changed to find the optimum parameter for higher removal. RESULT It was observed that the slower the flow rates of the feed solution the higher the removal because of larger contact time.
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Affiliation(s)
- Tawfik A Saleh
- Chemistry Department, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
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Saleh TA, Gupta VK. Photo-catalyzed degradation of hazardous dye methyl orange by use of a composite catalyst consisting of multi-walled carbon nanotubes and titanium dioxide. J Colloid Interface Sci 2012; 371:101-6. [PMID: 22297021 DOI: 10.1016/j.jcis.2011.12.038] [Citation(s) in RCA: 846] [Impact Index Per Article: 70.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2011] [Revised: 12/05/2011] [Accepted: 12/12/2011] [Indexed: 11/24/2022]
Abstract
The high rate of electron/hole pair recombination reduces the quantum yield of the processes with TiO(2) and represents its major drawback. Adding a co-adsorbent increases the photocatalytic efficiency of TiO(2). In order to hybridize the photocatalytic activity of TiO(2) with the adsorptivity of carbon nanotube, a composite of multi-walled carbon nanotubes and titanium dioxide (MWCNT/TiO(2)) has been synthesized. The composite was characterized by means of X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), Fourier transform infrared absorption spectroscopy (FTIR), and diffuse reflectance UV-vis spectroscopy. The catalytic activity of this composite material was investigated by application of the composite for the degradation of methyl orange. It was observed that the composite exhibits enhanced photocatalytic activity compared with TiO(2). The enhancement in photocatalytic performance of the MWCNT/TiO(2) composite is explained in terms of recombination of photogenerated electron-hole pairs. In addition, MWCNT acts as a dispersing agent preventing TiO(2) from agglomerating activity during the catalytic process, providing a high catalytically active surface area. This work adds to the global discussion of how CNTs can enhance the efficiency of catalysts.
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Affiliation(s)
- Tawfik A Saleh
- Chemistry Department, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia
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