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Moridi H, Talebi M, Jafarnezhad B, Mousavi SE, Abbasizadeh S. The role of chitosan grafted copolymer/zeolite Schiff base nanofiber in adsorption of copper and zinc cations from aqueous media. Int J Biol Macromol 2024; 278:135003. [PMID: 39181357 DOI: 10.1016/j.ijbiomac.2024.135003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2024] [Revised: 07/28/2024] [Accepted: 08/21/2024] [Indexed: 08/27/2024]
Abstract
The objective of this research was to develop and assess chitosan-grafted copolymer/HZSM5 zeolite Schiff base nanofibers for Cu2+ and Zn2+ adsorption from aqueous media. Nanofibers were prepared via electrospinning and characterized using XRD, FTIR, 1H NMR, FESEM, TGA, BET, and XPS. The study evaluated the effect of unmodified HZSM5 and Schiff base functionalization on adsorption capacities. Incorporating 10.0 wt% zeolite Schiff base as the optimum content into the chitosan-grafted copolymer significantly enhanced adsorption, achieving increases of 98.2 % for Zn2+ and 42.2 % for Cu2+. Specifically, Zn2+ adsorption increased from 27.6 to 54.7 mg/g, and Cu2+ from 67.1 to 95.4 mg/g. Factors such as temperature, pH, adsorption time, and initial cation concentration were analyzed. Kinetic studies revealed a double-exponential model, and isotherm analysis indicated a good fit with the Redlich-Peterson model, showing maximum monolayer capacities of 310.1 mg/g for Cu2+ and 97.8 mg/g for Zn2+ (pH 6.0, 240 min, 45 °C). The adsorption thermodynamics indicated a spontaneous and endothermic adsorption. Reusability tests showed minimal capacity loss (4.91 % for Cu2+ and 5.59 % for Zn2+) after five cycles. The nanofiber displayed greater selectivity for Cu2+ over Zn2+ in multi-ion systems and real electroplating wastewater, highlighting its potential for targeted heavy metal removal.
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Affiliation(s)
- Hadis Moridi
- Department of Chemistry, Central Tehran Branch, Islamic Azad University, Tehran, Iran.
| | - Marzieh Talebi
- Department of Chemical Engineering, Faculty of Engineering, University of Tehran, Tehran, Iran
| | - Bahareh Jafarnezhad
- Faculty of Pharmaceutical Sciences, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | | | - Saeed Abbasizadeh
- Faculty of Chemical Engineering, Tarbiat Modares University, Tehran, Iran.
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2
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Zhou M, Zhong L, Hu L, Zhou Y, Yang X. Synthesis of a reactive lignin-based flame retardant and its application in phenolic foam. ENVIRONMENTAL TECHNOLOGY 2024; 45:2506-2518. [PMID: 36751900 DOI: 10.1080/09593330.2023.2176792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 01/25/2023] [Indexed: 05/10/2023]
Abstract
To improve the flame retardancy of phenolic foam from the perspective of sustainable development, it is a feasible way to add bio-based flame retardants into phenolic foam. Lignin has a similar structure to phenol, which provides a possibility to replace part of phenol. In this paper, we prepared a kind of reactive bio-based flame retardant based on enzymatic hydrolyzed lignin, in which side chain was chemically grafted with phosphorus and nitrogen and benzene ring would participate in the phenolic condensation reaction. According to elemental analysis and ICP-OES data, the content of nitrogen and phosphorus in modified lignin (NP-L) increased to 2.95% and 3.55% respectively. Compared with original lignin, the carbon residue rate of NP-L increased from 3.25% to 12.13% because of the presence of flame retardant elements N and P. Then lignin-based flame retardant was used to replace phenol for modifying phenolic foams (NPLPFX). The limited oxygen index (LOI) and compressive strength of phenolic foam were improved effectively by adding modified lignin when the substitution rate was less than 25%. The LOI and compressive strength of the modified phenolic foam with 5% replacement amount (NPLPF5) are 55.6% and 0.24 MPa, which increased by 88% and 60% compared with pure phenolic foam. The cone calorimetric data also showed that NPLPF5 had good flame retardancy, and the peak heat release rate and total heat release were significantly lower than PF. This work suggests a novel green strategy for improving the flame retardancy performance of phenolic foam and promoting the utilization of lignin.
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Affiliation(s)
- Minghao Zhou
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, People's Republic of China
| | - Lei Zhong
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, People's Republic of China
| | - Lihong Hu
- Institute of Chemical Industry of Forest Products, CAF; Key Lab. of Biomass Energy and Material, Jiangsu Province; National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass; Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing, People's Republic of China
| | - Yonghong Zhou
- Institute of Chemical Industry of Forest Products, CAF; Key Lab. of Biomass Energy and Material, Jiangsu Province; National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass; Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing, People's Republic of China
| | - Xiaohui Yang
- Institute of Chemical Industry of Forest Products, CAF; Key Lab. of Biomass Energy and Material, Jiangsu Province; National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass; Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing, People's Republic of China
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3
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Yin C, Peng Y, Li H, Yang G, Yuan G. Facile construction of ZIF-94/PAN nanofiber by electrospinning for the removal of Co(II) from wastewater. Sci Rep 2024; 14:414. [PMID: 38172559 PMCID: PMC10764911 DOI: 10.1038/s41598-023-50796-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Accepted: 12/26/2023] [Indexed: 01/05/2024] Open
Abstract
This study aimed to synthesize a novel nanofiber adsorbent based on metal-organic frameworks (MOFs), ZIF-94-PAN, by incorporating ZIF-94 into polyacrylonitrile (PAN) through electrospinning. The investigation of the adsorption characteristics of ZIF-94-PAN for cobalt ions was undertaken, yielding findings that suggest an optimum ZIF-94 loading content within the ZIF-94-PAN composite of 8%. The adsorption experiments revealed that, under pH 8.3 and 298 K, ZIF-94-PAN-8% attained cobalt ion equilibrium adsorption (139.08 mg/g). Additionally, the adsorption kinetics of cobalt ions exhibited conformity with the pseudo-second-order model, whereas adherence to the Freundlich isotherm model indicated a non-homogeneous, endothermic process. XPS analysis unveiled that the adsorption mechanism was characterized by the coordination of nitrogen and oxygen atoms within ZIF-94-PAN with cobalt ions. This study effectively addressed the challenges of separating and recovering MOFs adsorbents by fabricating them as nanofibers. The remarkable adsorption performance and stability of the ZIF-94-PAN nanofibers highlight their potential for removing cobalt-contaminated wastewater.
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Affiliation(s)
- Cong Yin
- Xi'an Research Institute of Hi-Tech, Xi'an, 710025, People's Republic of China
| | - Yinyin Peng
- Chongqing University of Science and Technology, Chongqing, 401331, People's Republic of China.
| | - Hongjiang Li
- Chongqing University of Science and Technology, Chongqing, 401331, People's Republic of China
| | - Guang Yang
- Chongqing University of Science and Technology, Chongqing, 401331, People's Republic of China
| | - Guoyuan Yuan
- Chongqing University of Science and Technology, Chongqing, 401331, People's Republic of China.
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Hefnawy MA, Medany SS, Fadlallah SA, El-Sherif RM, Hassan SS. Novel Self-assembly Pd(II)-Schiff Base Complex Modified Glassy Carbon Electrode for Electrochemical Detection of Paracetamol. Electrocatalysis (N Y) 2022. [DOI: 10.1007/s12678-022-00741-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AbstractA self-assembly Pd-Schiff base complex was synthesized and used as an electrochemical sensor in phosphate buffer solution, where it enhanced the electrocatalytic activity toward the paracetamol detection. The Schiff base {(HL) = (4-(((Z)-3-(hydroxyimino) butan-2-ylidene) amino)-1,5-dimethyl-2-phenyl-1,2-dihydro-3H-pyrazol-3-one)} was selected to prepare Pd-based complexes due to its high antimicrobial activity. A linear calibration curve was constructed using GC/Pd-SB in paracetamol concentration range of 1–50 μM and its detection limit was calculated as 0.067 μM. The modified electrode, GC/Pd-SB, could successfully determine the paracetamol concentration in human blood serum and commercial drug tablets with high sensitivity. The prepared metal complex was characterized using techniques, namely, X-ray diffraction (XRD) and scanning electron microscope (SEM). In addition, electrochemical studies were performed using different electrochemical techniques like cyclic voltammetry (CV), linear sweep voltammetry (LSV), chronoamperometry (CA), and electrochemical impedance spectroscopy (EIS). DFT calculations were used to estimate the equilibrium geometry, molecular orbital, ground-state properties, and interaction energy between paracetamol and palladium.
Graphical Abstract
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5
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Luan L, Tang B, Ma S, Sun L, Xu W, Wang A, Niu Y. Removal of aqueous Zn(II) and Ni(II) by Schiff base functionalized PAMAM dendrimer/silica hybrid materials. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115634] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Vo TS, Hossain MM, Jeong HM, Kim K. Heavy metal removal applications using adsorptive membranes. NANO CONVERGENCE 2020; 7:36. [PMID: 33191443 PMCID: PMC7667210 DOI: 10.1186/s40580-020-00245-4] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 10/28/2020] [Indexed: 05/09/2023]
Abstract
Water is a significant natural resource for humans. As such, wastewater containing heavy metals is seen as a grave problem for the environment. Currently, adsorption is one of the common methods used for both water purification and wastewater treatment. Adsorption relies on the physical and chemical interactions between heavy metal ions and adsorbents. Adsorptive membranes (AMs) have demonstrated high effectiveness in heavy metal removal from wastewater owing to their exclusive structural properties. This article examines the applications of adsorptive membranes such as polymeric membranes (PMs), polymer-ceramic membranes (PCMs), electrospinning nanofiber membranes (ENMs), and nano-enhanced membranes (NEMs), which demonstrate high selectivity and adsorption capacity for heavy metal ions, as well as both advantages and disadvantages of each one all, are summarized and compared shortly. Moreover, the general theories for both adsorption isotherms and adsorption kinetics are described briefly to comprehend the adsorption process. This work will be valuable to readers in understanding the current applications of various AMs and their mechanisms in heavy metal ion adsorption, as well as the recycling methods in heavy ions desorption process are summarized and described clearly. Besides, the influences of morphological and chemical structures of AMs are presented and described in detail as well.
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Affiliation(s)
- Thi Sinh Vo
- School of Mechanical Engineering, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | | | - Hyung Mo Jeong
- School of Mechanical Engineering, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Kyunghoon Kim
- School of Mechanical Engineering, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
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7
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New Schiff bases derived from benzimidazole as efficient mercury-complexing agents in aqueous medium. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.06.060] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Gusain R, Kumar N, Fosso-Kankeu E, Ray SS. Efficient Removal of Pb(II) and Cd(II) from Industrial Mine Water by a Hierarchical MoS 2/SH-MWCNT Nanocomposite. ACS OMEGA 2019; 4:13922-13935. [PMID: 31497710 PMCID: PMC6714537 DOI: 10.1021/acsomega.9b01603] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Accepted: 07/31/2019] [Indexed: 05/19/2023]
Abstract
In this study, we investigate the adsorption capability of molybdenum sulfide (MoS2)/thiol-functionalized multiwalled carbon nanotube (SH-MWCNT) nanocomposite for rapid and efficient removal of heavy metals [Pb(II) and Cd(II)] from industrial mine water. The MoS2/SH-MWCNT nanocomposite was synthesized by acid treatment and sulfurization of MWCNTs followed by a facile hydrothermal reaction technique using sodium molybdate and diethyldithiocarbamate as MoS2 precursors. Morphological and chemical features of the nanocomposite material were studied using various characterization techniques. Furthermore, the effects of adsorbent (MoS2/SH-MWCNT nanocomposite) concentration, contact time, initial concentration of heavy-metal ions, and reaction temperature were examined to determine the efficiency of the adsorption process in batch adsorption experiments. Kinetics and isotherm studies showed that the adsorption process followed pseudo-second-order and Freundlich adsorption isotherm models, respectively. Thermodynamic parameters calculated using van't Hoff plots show the spontaneity and endothermic nature of adsorption. MoS2/SH-MWCNT nanocomposite demonstrates a high adsorption capacity for Pb(II) (90.0 mg g-1) and Cd(II) (66.6 mg g-1) following ion-exchange and electrostatic interactions. Metal-sulfur complex formation was identified as the key contributor for adsorption of heavy-metal ions followed by electrostatic interactions for multilayer adsorption. Transformation of adsorbent into PbMoO4-x S x and CdMoO4-x S x complex because of the adsorption process was confirmed by X-ray diffraction and scanning electron microscopy-energy-dispersive spectrometry. The spent adsorbent can further be used for photocatalytic and electrochemical applications; therefore, the generated secondary byproducts can also be employed for other purposes.
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Affiliation(s)
- Rashi Gusain
- DST-CSIR
National Centre for Nanostructured Materials, Council for Scientific and Industrial Research, Pretoria 0001, South Africa
- Department
of Chemical Sciences, University of Johannesburg, Doornfontein, Johannesburg 2028, South Africa
- E-mail: (R.G.)
| | - Neeraj Kumar
- DST-CSIR
National Centre for Nanostructured Materials, Council for Scientific and Industrial Research, Pretoria 0001, South Africa
| | - Elvis Fosso-Kankeu
- Water
Pollution Monitoring and Remediation Initiatives Research Group, School
of Chemical and Minerals Engineering, North
West University, P. Bag X6001, Potchefstroom 2520, South
Africa
| | - Suprakas Sinha Ray
- DST-CSIR
National Centre for Nanostructured Materials, Council for Scientific and Industrial Research, Pretoria 0001, South Africa
- Department
of Chemical Sciences, University of Johannesburg, Doornfontein, Johannesburg 2028, South Africa
- E-mail: , (S.S.R.)
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9
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Suručić LT, Janjić GV, Rakić AA, Nastasović AB, Popović AR, Milčić MK, Onjia AE. Theoretical modeling of sorption of metal ions on amino-functionalized macroporous copolymer in aqueous solution. J Mol Model 2019; 25:177. [PMID: 31161265 DOI: 10.1007/s00894-019-4053-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Accepted: 04/29/2019] [Indexed: 11/26/2022]
Abstract
With regard to the harmful effects of heavy metals on human health and the environment, the demand for synthesis and investigation of macromolecules with large capacity of harmful substances sorption is ever greater. Quantum-chemical methods may be applied in structural modeling, prediction, and characterization of such molecules and reactions. Sorption of metal ions (Cu2+, Cd2+, Co2+, and Ni2+) to triethylenetetramine-functionalized copolymer poly(GMA-co-EGDMA)-teta was successfully modeled by quantum chemical calculations, at the B3LYP//6-311++G**/lanl2dz level. Optimized structures of metal complexes were used for calculation of real binding energy of metal ion within the complex (ΔEr). Solvent and hydrolyzation effects were essential for obtaining the objective values. Solvent effect was included in ΔEr by using the total solvation energy for reaction of formation of tetaOH complex (ΔEs1, the first approach) or by using dehydration energy of free metal ion (ΔEs2, the second approach). Experimental results were confirmed in our theoretical analyses (using the second approach). Graphical abstract Theoretical modeling of divalent metal ions sorption on triethylenetetramine-functionalized copolymer poly(GMA-co-EGDMA)-teta.
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Affiliation(s)
- Ljiljana T Suručić
- University of Banja Luka, Faculty of Medicine, Save Mrkalja 14, 78000, Banja Luka, Republic of Srpska, Bosnia and Herzegovina.
| | - Goran V Janjić
- Institute of Chemistry Technology and Metallurgy, University of Belgrade, Njegoševa 12, Belgrade, 11000, Serbia
| | - Aleksandra A Rakić
- Faculty of Physical Chemistry, University of Belgrade, Studentski trg 12-16, Belgrade, 11158, Serbia
| | - Aleksandra B Nastasović
- Institute of Chemistry Technology and Metallurgy, University of Belgrade, Njegoševa 12, Belgrade, 11000, Serbia
| | - Aleksandar R Popović
- Faculty of Chemistry, University of Belgrade, Studentski trg 12 - 16, Belgrade, 11000, Serbia
| | - Miloš K Milčić
- Faculty of Chemistry, University of Belgrade, Studentski trg 12 - 16, Belgrade, 11000, Serbia
| | - Antonije E Onjia
- University of Belgrade, Faculty of Technology and Metallurgy, Karnegijeva 4, Belgrade, 11000, Serbia
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Hamrahian SA, Salehzadeh S, Rakhtshah J, Haji babaei F, Karami N. Preparation, characterization and catalytic application of molybdenum Schiff-base complex immobilized on silica-coated Fe3
O4
as a reusable catalyst for the synthesis of pyranopyrazole derivatives. Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4723] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
| | - Sadegh Salehzadeh
- Faculty of Chemistry, Bu-Ali Sina University; Hamedan 6517838683 Iran
| | - Jamshid Rakhtshah
- Faculty of Chemistry, Bu-Ali Sina University; Hamedan 6517838683 Iran
| | | | - Niloofar Karami
- Faculty of Chemistry, Bu-Ali Sina University; Hamedan 6517838683 Iran
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Khan A, Xing J, Elseman AM, Gu P, Gul K, Ai Y, Jehan R, Alsaedi A, Hayat T, Wang X. A novel magnetite nanorod-decorated Si-Schiff base complex for efficient immobilization of U(vi) and Pb(ii) from water solutions. Dalton Trans 2018; 47:11327-11336. [PMID: 29969122 DOI: 10.1039/c8dt01213j] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A novel silicon Schiff base complex (Si-SBC) and magnetite nanorod-decorated Si-SBC (M/SiO2-Si-SBC) were synthesized and well characterized in detail. The synthesized materials were applied for the removal of U(vi) and Pb(ii) from water solutions under various experimental conditions. The monolayer maximum adsorption capacities of M/SiO2-Si-SBC (6.45 × 10-4 mol g-1 for Pb(ii) and 4.82 × 10-4 mol g-1 for U(vi)) obtained from the Langmuir model at 25 °C and pH = 5.00 ± 0.05 were higher than those of Si-SBC (5.18 × 10-4 mol g-1 for Pb(ii) and 3.70 × 10-4 mol g-1 for U(vi)). Moreover, DFT calculations showed that the high adsorption energies (Ead) of 7.61 kcal mol-1 for Pb2+-(Si-SBC) and 2.72 kcal mol-1 for UO22+-(Si-SBC) are mainly attributed to stronger electrostatic interactions. The results revealed that the Si-SBC and M/SiO2-Si-SBC could be used as efficient adsorbents for the effective elimination of U(vi) and Pb(ii) from contaminated wastewater. High sorption capacity and reusability indicated the practical applications of the synthesized materials in environmental pollution cleanup.
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Affiliation(s)
- Ayub Khan
- College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, PR China.
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12
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Yuan W, Zhang C, Wei H, Wang Q, Li K. In situ synthesis and immobilization of a Cu(ii)–pyridyl complex on silica microspheres as a novel Fenton-like catalyst for RhB degradation at near-neutral pH. RSC Adv 2017. [DOI: 10.1039/c7ra02916k] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A Cu(ii)–pyridyl complex was in situ synthesized and immobilized onto silica microspheres as a highly effective Fenton-like catalyst at near-neutral pH.
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Affiliation(s)
- Wenhua Yuan
- College of Chemistry & Material Science
- Key Laboratory of Synthetic and Natural Function Molecule Chemistry
- Ministry of Education
- Northwest University
- Xi'an 710127
| | - Chaoying Zhang
- College of Chemistry & Material Science
- Key Laboratory of Synthetic and Natural Function Molecule Chemistry
- Ministry of Education
- Northwest University
- Xi'an 710127
| | - Hong Wei
- State Key Laboratory Base of Eco-Hydraulic Engineering in Arid Areas
- Xi'an University of Technology
- Xi'an 710048
- PR China
| | - Qinqin Wang
- College of Chemistry & Material Science
- Key Laboratory of Synthetic and Natural Function Molecule Chemistry
- Ministry of Education
- Northwest University
- Xi'an 710127
| | - Kebin Li
- College of Chemistry & Material Science
- Key Laboratory of Synthetic and Natural Function Molecule Chemistry
- Ministry of Education
- Northwest University
- Xi'an 710127
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Sorption efficiency of three novel extractant-impregnated resins containing vesuvin towards Pb(II) ion: Effect of nitrate and amine functionalization of resin backbone. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.05.060] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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14
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Nanostructured cobalt ions for the adsorption of an organic dye: Mechanism and electrochemical study in the presence of carbon nanotubes. Chem Eng Res Des 2016. [DOI: 10.1016/j.cherd.2016.03.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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15
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The high efficiency of Al2O3–SiO2–CuO nanocomposites as an adsorbent: synthesis and dye removal efficiency. RESEARCH ON CHEMICAL INTERMEDIATES 2015. [DOI: 10.1007/s11164-015-2341-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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16
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Gopalakrishnan A, Krishnan R, Thangavel S, Venugopal G, Kim SJ. Removal of heavy metal ions from pharma-effluents using graphene-oxide nanosorbents and study of their adsorption kinetics. J IND ENG CHEM 2015. [DOI: 10.1016/j.jiec.2015.06.005] [Citation(s) in RCA: 119] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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17
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Arshadi M, Faraji A, Amiri M, Mehravar M, Gil A. Removal of methyl orange on modified ostrich bone waste – A novel organic–inorganic biocomposite. J Colloid Interface Sci 2015; 446:11-23. [DOI: 10.1016/j.jcis.2014.12.098] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Revised: 12/27/2014] [Accepted: 12/30/2014] [Indexed: 10/24/2022]
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18
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Soleymanzadeh M, Arshadi M, Salvacion J, SalimiVahid F. A new and effective nanobiocomposite for sequestration of Cd(II) ions: Nanoscale zerovalent iron supported on sineguelas seed waste. Chem Eng Res Des 2015. [DOI: 10.1016/j.cherd.2014.06.006] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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19
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Preparation of Biodiesel from Soybean Catalyzed by Basic Ionic Liquids [Hnmm]OH. MATERIALS 2014; 7:8012-8023. [PMID: 28788287 PMCID: PMC5456433 DOI: 10.3390/ma7128012] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 11/13/2014] [Accepted: 12/02/2014] [Indexed: 11/17/2022]
Abstract
A morpholine alkaline basic ionic liquid (IL) 1-butyl-3-methyl morpholine hydroxide ([Hnmm]OH) was synthesized and characterized by 1H NMR and FT-IR. [Hnmm]OH is highly active in catalyzing the synthesis of biodiesel from the reaction of methanol with soybean oil. The influence of the reaction conditions, including the [Hnmm]OH catalyst amount, the molar ratio of methanol to soybean oil, reaction temperature and time, was investigated. Moreover, the pH and thermal stability of the catalyst was studied. The catalytic activity was affected by its alkalinity. The optimum reaction conditions were found as [Hnmm]OH amount of 4% (mass fraction), the methanol to soybean oil molar ratio of 8, temperature 70 °C and reaction time 1.5 h, the yield of Biodiesel reached 97.0%, and exhibits high stability upon recycling, the yield of Biodiesel is still more than 90% even after being reused for five times. A great advantage of using ILs is that it is very easy to separate the final products. After the reaction, a biphasic system was obtained. The top phase contains biodiesel and a little bit of methanol. Pure biodiesel can be isolated by vacuum evacuating the methanol. The bottom phase contains methanol, glycerol and ILs. Pure glycerol can be obtained simply by distillation. After distillation, pure ILs was obtained, which can be used directly for another reaction. The as prepared biodiesel shows very appealing properties.
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Synthesis and characterization of Al2O3–SiO2–MgO nanocomposite prepared by sol–gel process as an efficient catalyst for the Knoevenagel condensation of aldehydes with malononitrile. RESEARCH ON CHEMICAL INTERMEDIATES 2014. [DOI: 10.1007/s11164-014-1765-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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21
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Boroumand Jazi M, Arshadi M, Amiri M, Gil A. Kinetic and thermodynamic investigations of Pb(II) and Cd(II) adsorption on nanoscale organo-functionalized SiO2Al2O3. J Colloid Interface Sci 2014; 422:16-24. [DOI: 10.1016/j.jcis.2014.01.032] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2013] [Revised: 01/16/2014] [Accepted: 01/23/2014] [Indexed: 10/25/2022]
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Nanoscale Zero-Valent Iron (NZVI) supported on sineguelas waste for Pb(II) removal from aqueous solution: kinetics, thermodynamic and mechanism. J Colloid Interface Sci 2014; 426:241-51. [PMID: 24863789 DOI: 10.1016/j.jcis.2014.04.014] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Accepted: 04/06/2014] [Indexed: 11/24/2022]
Abstract
In this study, the synthesis and characterization of a new adsorbent containing nanoscale zerovalent iron particles (NZVI) decorated sineguelas waste (S-NaOH-NZVI) from agriculture biomass was investigated for the adsorption/reduction of inorganic pollution such as Pb(II) ions. The combination of ZVI particles on the surface of sineguelas waste can help to overcome the disadvantage of ultra-fine powders which may have strong tendency to agglomerate into larger particles, resulting in an adverse effect on both effective surface area and catalyst performance. The synthesized materials were characterized with different methods such as FT-IR, BET, XRD, TEM and pHPZC. Good dispersion of NZVI particles (ca. 10-70nm) on the sineguelas waste was observed. The effects of various parameters, such as contact time, pH, concentration, adsorbent dosage and temperature were studied. The adsorption of Pb(II) ions has been studied in terms of pseudo-first- and second-order kinetics, and the Freundlich, Langmuir and Langmuir-Freundlich isotherms models have also been used to the equilibrium adsorption data. The adsorption kinetics followed the mechanism of the pseudo-second-order equation. The thermodynamic parameters (ΔG, ΔH and ΔS) indicated that the adsorption of Pb(II) ions were feasible, spontaneous and endothermic at 25-80°C. XRD analysis indicated the presence of Pb(0) on the S-NaOH-NZVI surface. This study suggests that the modified sineguelas waste by NZVI particles can be prepared at low cost and the materials are environmentally benign for the removal of Pb(II) ions, and likely many other heavy metal ions, from water.
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Tang J, Sun J, Xu J, Li W. Grafting of poly[styrene-co-N-(4-vinylbenzyl)-N,N-diethylamine] polymer film onto the surface of silica microspheres and their application as an effective sorbent for lead ions. J Appl Polym Sci 2013. [DOI: 10.1002/app.39973] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Jianxin Tang
- Key Laboratory of Green Packaging and Application Biological Nanotechnology of Hunan Province; Hunan University of Technology; Zhuzhou 412007 People's Republic of China
| | - Jingjing Sun
- Key Laboratory of Green Packaging and Application Biological Nanotechnology of Hunan Province; Hunan University of Technology; Zhuzhou 412007 People's Republic of China
| | - Jianxiong Xu
- Key Laboratory of Green Packaging and Application Biological Nanotechnology of Hunan Province; Hunan University of Technology; Zhuzhou 412007 People's Republic of China
| | - Wen Li
- Key Laboratory of Green Packaging and Application Biological Nanotechnology of Hunan Province; Hunan University of Technology; Zhuzhou 412007 People's Republic of China
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Zhang J, Zhao H, Cao H, Li H, Li Z. Removal of Cd2+ from water by Friedel's salt (FS: 3CaO x A12O3 x CaCI2 x 10H2O): sorption characteristics and mechanisms. J Environ Sci (China) 2013; 25:1719-1725. [PMID: 24520713 DOI: 10.1016/s1001-0742(12)60287-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The development of low-cost and efficient new mineral adsorbents has been a hot topic in recent years. In this study, Friedel's salt (FS: 3CaO x A12O3 x CaCl2 x10H2O), a hexagonal layered inorganic absorbent, was synthesized to remove Cd2+ from water. The adsorption process was simulated by Langmuir and Freundlich models. The adsorption mechanism was further analyzed with TEM, XRD, FT-IR analysis and monitoring of metal cations released and solution pH variation. The results indicated the adsorbent FS had an outstanding ability for Cd(II) adsorption. The maximum adsorption capacity of the FS for Cd(II) removal can reach up to 671.14 mg/g. The nearly equal numbers of Cd2+ adsorbed and Ca2+ released demonstrated that ion-exchange (both surface and inner) of the FS for Cd(II) played an important role during the adsorption process. Furthermore, the surface of the FS after adsorption was microscopically disintegrated while the inner lamellar structure was almost unchanged. The behavior of Cd(II) adsorption by FS was significantly affected by surface reactions. The mechanisms of Cd2+ adsorption by the FS mainly included surface complexation and surface precipitation. In the present study, the adsorption process was fitted better by the Langmuir isotherm model (R2 = 0.9999) than the Freundlich isotherm model (R2 = 0.8122). Finally, due to the high capacity for ion-exchange on the FS surface, FS is a promising layered inorganic adsorbent for the removal of Cd(II) from water.
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Affiliation(s)
- Juanjuan Zhang
- Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - He Zhao
- National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Beijing 100190, China
| | - Hongbin Cao
- Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Heping Li
- College of Chemical and Biologic Engineering, Changsha University of Science and Technology, Hunan 410004, China
| | - Zhibao Li
- National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Beijing 100190, China
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Amiri MJ, Abedi-Koupai J, Eslamian SS, Mousavi SF, Hasheminejad H. Modeling Pb (II) adsorption from aqueous solution by ostrich bone ash using adaptive neural-based fuzzy inference system. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2013; 48:543-558. [PMID: 23383640 DOI: 10.1080/10934529.2013.730451] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
To evaluate the performance of Adaptive Neural-Based Fuzzy Inference System (ANFIS) model in estimating the efficiency of Pb (II) ions removal from aqueous solution by ostrich bone ash, a batch experiment was conducted. Five operational parameters including adsorbent dosage (C(s)), initial concentration of Pb (II) ions (C(o)), initial pH, temperature (T) and contact time (t) were taken as the input data and the adsorption efficiency (AE) of bone ash as the output. Based on the 31 different structures, 5 ANFIS models were tested against the measured adsorption efficiency to assess the accuracy of each model. The results showed that ANFIS5, which used all input parameters, was the most accurate (RMSE = 2.65 and R(2) = 0.95) and ANFIS1, which used only the contact time input, was the worst (RMSE = 14.56 and R(2) = 0.46). In ranking the models, ANFIS4, ANFIS3 and ANFIS2 ranked second, third and fourth, respectively. The sensitivity analysis revealed that the estimated AE is more sensitive to the contact time, followed by pH, initial concentration of Pb (II) ions, adsorbent dosage, and temperature. The results showed that all ANFIS models overestimated the AE. In general, this study confirmed the capabilities of ANFIS model as an effective tool for estimation of AE.
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Affiliation(s)
- Mohammad J Amiri
- Department of Water Engineering, College of Agriculture, Isfahan University of Technology, Isfahan, Iran
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