1
|
Deka DK, Pati S. Electrocoalescence dynamics of two unequal-sized droplets. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2023.131152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
|
2
|
Study on removal of Microcystis aeruginosa and Cr (VI) using attapulgite-Fe3O4 magnetic composite material (MCM). ALGAL RES 2021. [DOI: 10.1016/j.algal.2021.102501] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
3
|
Bortot Coelho FE, Oliveira VS, Araújo EMR, Balarini JC, Konzen C, Salum A, Miranda TLS. Treatment of a wastewater from a galvanizing industry containing chromium(VI) and zinc(II) by liquid surfactant membranes technique. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2021; 56:289-302. [PMID: 33444076 DOI: 10.1080/10934529.2020.1871268] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Revised: 12/22/2020] [Accepted: 12/24/2020] [Indexed: 06/12/2023]
Abstract
Galvanizing industries generate large amounts of effluents rich in toxic and carcinogenic chromium(VI) species. Effective and sustainable treatments are required to comply with environmental regulations. This work focused on the development of innovative treatments for Cr(VI) by its removal from a galvanizing industry wastewater (pHinitial = 5.9) containing Cr (78 mg.L-1) and Zn (2178 mg.L-1) using the liquid surfactant membranes technique. The membrane phase carrier was Alamine® 336 in Escaid™ 110. For a synthetic solution (Cr(VI) = 353mg.L-1, pHinternal phase = 1.5), 99.9% of Cr(VI) was extracted in three stages ([KOH]internal phase = 0.27 mol.L-1). For the galvanizing wastewater, two selective extractions treatments were proposed: (1) 87% of Cr(VI) and 2% of Zn(II) were extracted in a single stage ([HCl]feed phase = 0.03 mol.L-1, [KOH]internal phase = 0.6 mol.L-1); (2) 95.6% of Cr(VI) and practically no zinc were extracted in a single stage ([HCl] feed phase = 10-6mol.L-1, [HCl] internal phase = 5mol.L-1). In another treatment condition ([HCl] feed phase = 2mol.L-1 and [KOH] internal phase = 1.2 mol.L-1), the simultaneous Cr(VI) and Zn(II) extractions (95% and 70%, respectively) were obtained in a single stage and more than 99% of both metals in three stages. This resulted in a depleted feed phase with 0.01 mg.L-1 of Cr(VI), that allows its discharge, according to the Brazilian legislation (≤0.1 mg/L).
Collapse
Affiliation(s)
- Fabrício E Bortot Coelho
- Chemical Engineering Department, School of Engineering, Federal University of Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Vanesa S Oliveira
- Chemical Engineering Department, School of Engineering, Federal University of Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Estêvão M R Araújo
- Chemical Engineering Department, School of Engineering, Federal University of Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Julio C Balarini
- Chemical Engineering Department, School of Engineering, Federal University of Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Cibele Konzen
- Chemical Engineering Department, School of Engineering, Federal University of Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Adriane Salum
- Chemical Engineering Department, School of Engineering, Federal University of Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Tânia L S Miranda
- Chemical Engineering Department, School of Engineering, Federal University of Minas Gerais (UFMG), Belo Horizonte, Brazil
| |
Collapse
|
4
|
Khan FSA, Mubarak NM, Khalid M, Walvekar R, Abdullah EC, Mazari SA, Nizamuddin S, Karri RR. Magnetic nanoadsorbents' potential route for heavy metals removal-a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:24342-24356. [PMID: 32306264 DOI: 10.1007/s11356-020-08711-6] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 04/01/2020] [Indexed: 06/11/2023]
Abstract
Due to the rapid growth in the heavy metal-based industries, their effluent and local dumping have created significant environmental issues. In the past, typically, removal of heavy metals was handled by reverse osmosis and ion exchange techniques, but these methods have many disadvantages. Therefore, extensive work into the development of improved techniques has increased, especially for heavy metal removal. Many countries are currently researching new materials and techniques based on nanotechnology for various applications that involve extracting heavy metals from different water sources such as wastewater, groundwater, drinking water and surface water. Nanotechnology provides the possibility of enhancing existing techniques to tackle problems more efficiently. The development in nanotechnology has led to the discovery of many new materials such as magnetic nanoparticles. These nanoparticles demonstrate excellent properties such as surface-volume ratio, higher surface area, low toxicity and easy separation. Besides, magnetic nanoparticles can be easily and efficiently recovered after adsorption compared with other typical adsorbents. This review mainly emphasises on the efficiency of heavy metal removal using magnetic nanoadsorbent from aqueous solution. In addition, an in-depth analysis of the synthesis, characterisation and modification approaches of magnetic nanoparticles is systematically presented. Furthermore, future opportunities and challenges of using magnetic particles as an adsorbent for the removal of heavy metals are also discussed.
Collapse
Affiliation(s)
- Fahad Saleem Ahmed Khan
- Department of Chemical Engineering, Faculty of Engineering and Science, Curtin University, 98009, Miri, Sarawak, Malaysia
| | - Nabisab Mujawar Mubarak
- Department of Chemical Engineering, Faculty of Engineering and Science, Curtin University, 98009, Miri, Sarawak, Malaysia.
| | - Mohammad Khalid
- Graphene & Advanced 2D Materials Research Group (GAMRG), School of Science and Technology, Sunway University, No. 5, Jalan Universiti, Bandar Sunway, 47500, Subang Jaya, Selangor, Malaysia
| | - Rashmi Walvekar
- Department of Chemical Engineering, School of Energy and Chemical Engineering, Xiamen University Malaysia, Jalan Sunsuria, Bandar Sunsuria, 43900, Sepang, Selangor, Malaysia
| | - Ezzat Chan Abdullah
- Department of Chemical Process Engineering, Malaysia-Japan International Institute of Technology (MJIIT), Universiti Teknologi Malaysia (UTM), Jalan Sultan Yahya Petra, 54100, Kuala Lumpur, Malaysia
| | - Shaukat A Mazari
- Department of Chemical Engineering, Dawood University of Engineering and Technology, Karachi, Pakistan
| | | | - Rama Rao Karri
- Petroleum, and Chemical Engineering, Faculty of Engineering, Universiti Teknologi Brunei, Bandar Seri Begawan, Brunei Darussalam
| |
Collapse
|
5
|
Maher S, Mahmoud M, Rizk M, Kalil H. Synthetic melanin nanoparticles as peroxynitrite scavengers, photothermal anticancer and heavy metals removal platforms. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:19115-19126. [PMID: 30982188 DOI: 10.1007/s11356-019-05111-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Accepted: 04/04/2019] [Indexed: 06/09/2023]
Abstract
Melanin is a ubiquitous natural polyphenolic pigment with versatile applications including physiological functions. This polymeric material is found in a diversity of living organisms from bacteria to mammals. The biocompatibility and thermal stability of melanin nanoparticles make them good candidates to work as free radical scavengers and photothermal anticancer substrates. Research studies have identified melanin as an antioxidative therapeutic agent and/or reactive oxygen species (ROS) scavenger that includes neutralization of peroxynitrite. In addition, melanin nanoparticles have emerged as an anticancer photothermal platform that has the capability to kill cancer cells. Recently, melanin nanoparticles have been successfully used as chelating agents to purify water from heavy metals, such as hexavalent chromium. This review article highlights some selected aspects of cutting-edge melanin applications. Herein, we will refer to the recent literature that addresses melanin nanoparticles and its useful physicochemical properties as a hot topic in biomaterial science. It is expected that the techniques of Dynamic Light Scattering (DLS), Scanning Electron Microscopy (SEM), and time-resolved Electron Paramagnetic Resonance (EPR) will have a strong impact on the full characterization of melanin nanoparticles and the subsequent exploration of their physiological and chemical mechanisms.
Collapse
Affiliation(s)
- Shaimaa Maher
- Department of Chemistry, College of Science, Cleveland State University, Cleveland, OH, 44115, USA
| | - Marwa Mahmoud
- Department of Science and Mathematics, Faculty of Petroleum and Mining Engineering, Suez University, Suez, Egypt
| | - Moustafa Rizk
- Department of Chemistry, Faculty of Science and Arts, Najran University, Sharourah, Najran, Saudi Arabia
- Department of Chemistry, Faculty of Science, Suez Canal University, Ismailia, Egypt
| | - Haitham Kalil
- Department of Chemistry, College of Science, Cleveland State University, Cleveland, OH, 44115, USA.
- Department of Chemistry, Faculty of Science, Suez Canal University, Ismailia, Egypt.
- Department of Chemistry and Biochemistry, University of Mount Union, Alliance, OH, 44601, USA.
| |
Collapse
|
6
|
Pilot-Scale Removal of Arsenic and Heavy Metals from Mining Wastewater Using Adsorption Combined with Constructed Wetland. MINERALS 2019. [DOI: 10.3390/min9060379] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
This study was conducted to assess the removal of arsenic (As) and heavy metals from mining wastewater by the combination of adsorption, using modified iron-ore drainage sludge, and horizontal-subsurface-flow constructed wetland with common reed (Phragmites australis). The pilot-scale experiment with a constant flow rate of 5 m3/day was operated for four months using real wastewater from a Pb–Zn mine in northern Vietnam. Atomic absorption spectroscopy was used for elemental analysis in wastewater and plant. X-ray diffraction (XRD), surface charge measurements (by a particle charge detector (PCD)), Fourier-transform infrared (FTIR), and surface area Brunauer–Emmet–Teller (BET) measurements were performed to determine the characteristics of the adsorbent. The results showed that the average removals of As, Mn, Cd, Zn, and Pb by the combined system with limestone substrate during four months were 80.3%, 96.9%, 79.6%, 52.9%, and 38.7%, respectively. The use of another constructed wetland substrate, laterite, demonstrated better removal efficiency of As than limestone. The concentrations of As and heavy metals in the effluent were lower than the limits established by the QCVN 40:2011/BTNMT for industrial wastewater, which indicated the feasibility of combining adsorption and constructed wetland for the treatment of mining wastewater.
Collapse
|
7
|
He H, Hashemi L, Hu ML, Morsali A. The role of the counter-ion in metal-organic frameworks’ chemistry and applications. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2018.08.014] [Citation(s) in RCA: 112] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
8
|
Jia K, Zhang X, Zhang L, Yu L, Wu Y, Li L, Mai Y, Liao B. Photoinduced Reconfiguration of Complex Emulsions Using a Photoresponsive Surfactant. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:11544-11552. [PMID: 30184432 DOI: 10.1021/acs.langmuir.8b02456] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Photoresponsive complex emulsions are prepared in a three-phase system consisting of two oils: hexane (H) and perfluorooctane (F). An aqueous solution of a mixed surfactant of fluorosurfactant, F(CF2) x(CH2CH2O) yH (Zonyl FS-300), and a synthesized light-responsive surfactant, 2-(4-(4-butylphenyl)diazenylphenoxy)ethyltrimethylammonium bromide (C4AZOC2TAB) was employed as the continuous phase. Complex emulsions with various geometries were prepared by one-step vortex mixing and a temperature-induced phase-separation method. It was noticed that the topology of the complex emulsion was highly dependent on the mass ratio of Zonyl FS-300/C4AZOC2TAB. Light microscopy images showed that phase inversion from an H/F/W- to an F/H/W-type double emulsion via a Janus emulsion was achieved by gradually increasing the mass ratio of C4AZOC2TAB/Zonyl FS-300. Upon UV/blue light irradiation, the topology of complex emulsions was turned to switch from an F/H/W double emulsion to a Janus emulsion to an entirely inverted H/F/W double emulsion. Dynamic interfacial tension measurements showed that UV irradiation of the interface between an aqueous trans-C4AZOC2TAB solution and hexane brings about an increase in the interfacial tension, suggesting the nature of photoinduced morphological changes in complex emulsions. The reconfiguration process of complex emulsions was illustrated by the Marangoni effect based on heterogeneity in the interfacial tension at the complex emulsion surface induced by controlling the molecular conversion of C4AZOC2TAB using light irradiation. Finally, we used the complex emulsions structure to form an on-off switch to start and shut off the evaporation of one volatile phase to achieve process monitoring. This could be used to initiate and quench a reaction, which offers a novel idea for achieving switchable and reversible reaction control in multiple-phase reactions.
Collapse
Affiliation(s)
- Kangle Jia
- Guangdong Provincial Key Laboratory of Industrial Surfactant , Guangdong Research Institute of Petrochemical and Fine Chemical Engineering , Guangzhou 510000 , Guangdong P. R. China
| | - Xiong Zhang
- Guangdong Provincial Key Laboratory of Industrial Surfactant , Guangdong Research Institute of Petrochemical and Fine Chemical Engineering , Guangzhou 510000 , Guangdong P. R. China
| | - Lei Zhang
- Guangdong Provincial Key Laboratory of Industrial Surfactant , Guangdong Research Institute of Petrochemical and Fine Chemical Engineering , Guangzhou 510000 , Guangdong P. R. China
| | - Longfei Yu
- Guangdong Provincial Key Laboratory of Industrial Surfactant , Guangdong Research Institute of Petrochemical and Fine Chemical Engineering , Guangzhou 510000 , Guangdong P. R. China
| | - Yuchao Wu
- Guangdong Provincial Key Laboratory of Industrial Surfactant , Guangdong Research Institute of Petrochemical and Fine Chemical Engineering , Guangzhou 510000 , Guangdong P. R. China
| | - Li Li
- Guangdong Provincial Key Laboratory of Industrial Surfactant , Guangdong Research Institute of Petrochemical and Fine Chemical Engineering , Guangzhou 510000 , Guangdong P. R. China
| | - Yuliang Mai
- Guangdong Provincial Key Laboratory of Industrial Surfactant , Guangdong Research Institute of Petrochemical and Fine Chemical Engineering , Guangzhou 510000 , Guangdong P. R. China
| | - Bing Liao
- Guangdong Provincial Key Laboratory of Industrial Surfactant , Guangdong Research Institute of Petrochemical and Fine Chemical Engineering , Guangzhou 510000 , Guangdong P. R. China
| |
Collapse
|
9
|
Separation of hexavalent chromium from industrial effluent through liquid membrane using environmentally benign solvent: A study of experimental optimization through response surface methodology. Chem Eng Res Des 2018. [DOI: 10.1016/j.cherd.2018.02.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
10
|
Cuong AM, Le Na NT, Thang PN, Diep TN, Thuy LB, Thanh NL, Thang ND. Melanin-embedded materials effectively remove hexavalent chromium (Cr VI) from aqueous solution. Environ Health Prev Med 2018; 23:9. [PMID: 29471789 PMCID: PMC5824532 DOI: 10.1186/s12199-018-0699-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Accepted: 02/18/2018] [Indexed: 12/11/2022] Open
Abstract
Background Currently, it is recognized that water polluted with toxic heavy metal ions may cause serious effects on human health. Therefore, the development of new materials for effective removal of heavy metal ions from water is still a widely important area. Melanin is being considered as a potential material for removal of heavy metal from water. Methods In this study, we synthesized two melanin-embedded beads from two different melanin powder sources and named IMB (Isolated Melanin Bead originated from squid ink sac) and CMB (Commercial Melanin Bead originated from sesame seeds). These beads were of globular shape and 2–3 mm in diameter. We investigated and compared the sorption abilities of these two bead materials toward hexavalent-chromium (CrVI) in water. The isotherm sorption curves were established using Langmuir and Freundlich models in the optimized conditions of pH, sorption time, solid/liquid ratio, and initial concentration of CrVI. The FITR analysis was also carried out to show the differences in surface properties of these two beads. Results The optimized conditions for isotherm sorption of CrVI on IMB/CMB were set at pH values of 2/2, sorption times of 90/300 min, and solid-liquid ratios of 10/20 mg/mL. The maximum sorption capacities calculated based on the Langmuir model were 19.60 and 6.24 for IMB and CMB, respectively. However, the adsorption kinetic of CrVI on the beads fitted the Freundlich model with R2 values of 0.992 for IMB and 0.989 for CMB. The deduced Freundlich constant, 1/n, in the range of 0.2–0.8 indicated that these beads are good adsorption materials. In addition, structure analysis data revealed great differences in physical and chemical properties between IMB and CMB. Interestingly, FTIR analysis results showed strong signals of –OH (3295.35 cm− 1) and –C=O (1608.63 cm− 1) groups harboring on the IMB but not CMB. Moreover, loading of CrVI on the IMB caused a shift of broad peaks from 3295.35 cm− 1 and 1608.63 cm− 1 to 3354.21 cm− 1 and 1597.06 cm− 1, respectively, due to –OH and –C=O stretching. Conclusions Taken together, our study suggests that IMB has great potential as a bead material for the elimination of CrVI from aqueous solutions and may be highly useful for water treatment applications.
Collapse
Affiliation(s)
- An Manh Cuong
- Department of Biochemistry and Molecular Biology, Faculty of Biology, VNU University of Science, Vietnam National University, 334 Nguyen Trai St., Thanh Xuan Dist, Hanoi, Vietnam
| | - Nguyen Thi Le Na
- Department of Biochemistry and Molecular Biology, Faculty of Biology, VNU University of Science, Vietnam National University, 334 Nguyen Trai St., Thanh Xuan Dist, Hanoi, Vietnam
| | - Pham Nhat Thang
- High school for Gifted Students, VNU University of Science, Hanoi, Vietnam
| | - Trinh Ngoc Diep
- High school for Gifted Students, VNU University of Science, Hanoi, Vietnam
| | - Ly Bich Thuy
- Institute for Environmental Science and Technology, Hanoi University of Science and Technology, Hanoi, Vietnam
| | - Nguyen Lai Thanh
- Department of Biochemistry and Molecular Biology, Faculty of Biology, VNU University of Science, Vietnam National University, 334 Nguyen Trai St., Thanh Xuan Dist, Hanoi, Vietnam
| | - Nguyen Dinh Thang
- Department of Biochemistry and Molecular Biology, Faculty of Biology, VNU University of Science, Vietnam National University, 334 Nguyen Trai St., Thanh Xuan Dist, Hanoi, Vietnam. .,Key Laboratory of Enzyme and Protein Technology, VNU University of Science, Hanoi, Vietnam.
| |
Collapse
|
11
|
Schmitt M, Toor R, Denoyel R, Antoni M. Spontaneous Microstructure Formation at Water/Paraffin Oil Interfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:14011-14019. [PMID: 29131632 DOI: 10.1021/acs.langmuir.7b02549] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
An experimental investigation of spontaneous emulsification is proposed with a water drop pendant in a paraffin oil (PO) solution loaded with a surfactant (SPAN80). Optical microscopy in a transmission mode is employed for high-spatial-resolution image recording. The kinetics of spontaneous emulsification is studied. It is shown to generate a darkening of the drops because of interface modification with a characteristic time that depends upon the SPAN80 concentration. For low concentrations, spontaneous emulsification is slow and produces micrometer-sized droplets, whereas for large concentrations, it is fast and bush-like microstructures are observed. These microstructures increase in size and progressively invade the complete water/PO interfaces, detach, and finally migrate into the PO phase. This transport phenomenon withdraws water from the drops and leads to a gradual shrinking of their volume. At the end of this process, they appear as deformed objects surrounded by a loose membrane.
Collapse
Affiliation(s)
| | - Ritu Toor
- Aix-Marseille University, CNRS, MADIREL , Marseille, France
| | - Renaud Denoyel
- Aix-Marseille University, CNRS, MADIREL , Marseille, France
| | - Mickaël Antoni
- Aix-Marseille University, CNRS, MADIREL , Marseille, France
| |
Collapse
|
12
|
Luo MB, Xiong YY, Wu HQ, Feng XF, Li JQ, Luo F. The MOF+Technique: A Significant Synergic Effect Enables High Performance Chromate Removal. Angew Chem Int Ed Engl 2017; 56:16376-16379. [DOI: 10.1002/anie.201709197] [Citation(s) in RCA: 93] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Indexed: 12/27/2022]
Affiliation(s)
- Ming Biao Luo
- School of Biology, Chemistry and Material Science; East China University of Technology; Fuzhou Jiangxi 344000 China
| | - Yang Yang Xiong
- School of Biology, Chemistry and Material Science; East China University of Technology; Fuzhou Jiangxi 344000 China
| | - Hui Qiong Wu
- School of Biology, Chemistry and Material Science; East China University of Technology; Fuzhou Jiangxi 344000 China
| | - Xue Feng Feng
- School of Biology, Chemistry and Material Science; East China University of Technology; Fuzhou Jiangxi 344000 China
| | - Jian Qiang Li
- School of Biology, Chemistry and Material Science; East China University of Technology; Fuzhou Jiangxi 344000 China
| | - Feng Luo
- School of Biology, Chemistry and Material Science; East China University of Technology; Fuzhou Jiangxi 344000 China
| |
Collapse
|
13
|
Luo MB, Xiong YY, Wu HQ, Feng XF, Li JQ, Luo F. The MOF+Technique: A Significant Synergic Effect Enables High Performance Chromate Removal. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201709197] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Ming Biao Luo
- School of Biology, Chemistry and Material Science; East China University of Technology; Fuzhou Jiangxi 344000 China
| | - Yang Yang Xiong
- School of Biology, Chemistry and Material Science; East China University of Technology; Fuzhou Jiangxi 344000 China
| | - Hui Qiong Wu
- School of Biology, Chemistry and Material Science; East China University of Technology; Fuzhou Jiangxi 344000 China
| | - Xue Feng Feng
- School of Biology, Chemistry and Material Science; East China University of Technology; Fuzhou Jiangxi 344000 China
| | - Jian Qiang Li
- School of Biology, Chemistry and Material Science; East China University of Technology; Fuzhou Jiangxi 344000 China
| | - Feng Luo
- School of Biology, Chemistry and Material Science; East China University of Technology; Fuzhou Jiangxi 344000 China
| |
Collapse
|
14
|
Haktanır C, Özbelge HÖ, Bıçak N, Yılmaz L. Removal of hexavalent chromium anions via polymer enhanced ultrafiltration using a fully ionized polyelectrolyte. SEP SCI TECHNOL 2017. [DOI: 10.1080/01496395.2017.1343351] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Ceren Haktanır
- Department of Advanced Technologies, Gazi University, Ankara, Turkey
| | - H. Önder Özbelge
- Department of Chemical Engineering, Middle East Technical University, Ankara, Turkey
| | - Niyazi Bıçak
- Department of Chemistry, Istanbul Technical University, Istanbul, Turkey
| | - Levent Yılmaz
- Department of Chemical Engineering, Middle East Technical University, Ankara, Turkey
| |
Collapse
|
15
|
Dong J, Xu H, Hou SL, Wu ZL, Zhao B. Metal-Organic Frameworks with Tb 4 Clusters as Nodes: Luminescent Detection of Chromium(VI) and Chemical Fixation of CO 2. Inorg Chem 2017; 56:6244-6250. [PMID: 28481512 DOI: 10.1021/acs.inorgchem.7b00323] [Citation(s) in RCA: 87] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Two multifunctional metal-organic frameworks based on cubane-like tetrahedron Tb4 clusters as nodes have been synthesized and characterized. Compound 1 exhibits a 2D lanthanide-organic framework with Tb4 clusters as nodes, and compound 2 possesses a 3D framework with Tb4 clusters and Mn2+ as nodes. Interestingly, luminescent investigations on them reveal that the two compounds can act as recyclable luminescent probes for chromium(VI) anion species and the corresponding detection limit can reach 10-7 mol/L. Furthermore, 1 and 2 own efficient catalytic activity for the chemical fixation of CO2 with epoxides under mild conditions. Importantly, they both can be recycled at least three times without compromising the activity.
Collapse
Affiliation(s)
- Jie Dong
- Department of Chemistry, Key Laboratory of Advanced Energy Material Chemistry, MOE, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University , Tianjin 300071, China
| | - Hang Xu
- Department of Chemistry, Key Laboratory of Advanced Energy Material Chemistry, MOE, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University , Tianjin 300071, China
| | - Sheng-Li Hou
- Department of Chemistry, Key Laboratory of Advanced Energy Material Chemistry, MOE, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University , Tianjin 300071, China
| | - Zhi-Lei Wu
- Department of Chemistry, Key Laboratory of Advanced Energy Material Chemistry, MOE, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University , Tianjin 300071, China
| | - Bin Zhao
- Department of Chemistry, Key Laboratory of Advanced Energy Material Chemistry, MOE, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University , Tianjin 300071, China
| |
Collapse
|
16
|
Guo P, Zeng C, Wang C, Zhang L. Magnetic ionic liquid‐water Janus droplets: Preparation, structure and morphology adjustment and magnetic manipulation. AIChE J 2017. [DOI: 10.1002/aic.15672] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Peng Guo
- The State Key Laboratory of Materials‐Oriented Chemical Engineering and College of Chemistry and Chemical EngineeringNanjing Tech UniversityNanjing210009 P.R. China
| | - Changfeng Zeng
- College of Mechanical and Power EngineeringNanjing Tech UniversityNo. 5 Xin Mofan RdNanjing210009 P.R. China
| | - Chongqing Wang
- The State Key Laboratory of Materials‐Oriented Chemical Engineering and College of Chemistry and Chemical EngineeringNanjing Tech UniversityNanjing210009 P.R. China
| | - Lixiong Zhang
- The State Key Laboratory of Materials‐Oriented Chemical Engineering and College of Chemistry and Chemical EngineeringNanjing Tech UniversityNanjing210009 P.R. China
| |
Collapse
|
17
|
Zhong L, He X, Qu J, Li X, Lei Z, Zhang Q, Liu X. Precursor preparation for Ca-Al layered double hydroxide to remove hexavalent chromium coexisting with calcium and magnesium chlorides. J SOLID STATE CHEM 2017. [DOI: 10.1016/j.jssc.2016.10.022] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
18
|
ZHANG L, CHEN Q, KANG C, MA X, YANG Z. Rare earth extraction from wet process phosphoric acid by emulsion liquid membrane. J RARE EARTH 2016. [DOI: 10.1016/s1002-0721(16)60087-x] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
19
|
Cao CS, Hu HC, Xu H, Qiao WZ, Zhao B. Two solvent-stable MOFs as a recyclable luminescent probe for detecting dichromate or chromate anions. CrystEngComm 2016. [DOI: 10.1039/c5ce02568k] [Citation(s) in RCA: 112] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
20
|
Fang Z, Liu X, Zhang M, Sun J, Mao S, Lu J, Rohani S. A neural network approach to simulating the dynamic extraction process of l-phenylalanine from sodium chloride aqueous solutions by emulsion liquid membrane. Chem Eng Res Des 2016. [DOI: 10.1016/j.cherd.2015.11.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
21
|
Zarzar LD, Sresht V, Sletten EM, Kalow JA, Blankschtein D, Swager TM. Dynamically reconfigurable complex emulsions via tunable interfacial tensions. Nature 2015; 518:520-4. [PMID: 25719669 DOI: 10.1038/nature14168] [Citation(s) in RCA: 239] [Impact Index Per Article: 26.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Accepted: 12/24/2014] [Indexed: 01/14/2023]
Abstract
Emulsification is a powerful, well-known technique for mixing and dispersing immiscible components within a continuous liquid phase. Consequently, emulsions are central components of medicine, food and performance materials. Complex emulsions, including Janus droplets (that is, droplets with faces of differing chemistries) and multiple emulsions, are of increasing importance in pharmaceuticals and medical diagnostics, in the fabrication of microparticles and capsules for food, in chemical separations, in cosmetics, and in dynamic optics. Because complex emulsion properties and functions are related to the droplet geometry and composition, the development of rapid, simple fabrication approaches allowing precise control over the droplets' physical and chemical characteristics is critical. Significant advances in the fabrication of complex emulsions have been made using a number of procedures, ranging from large-scale, less precise techniques that give compositional heterogeneity using high-shear mixers and membranes, to small-volume but more precise microfluidic methods. However, such approaches have yet to create droplet morphologies that can be controllably altered after emulsification. Reconfigurable complex liquids potentially have great utility as dynamically tunable materials. Here we describe an approach to the one-step fabrication of three- and four-phase complex emulsions with highly controllable and reconfigurable morphologies. The fabrication makes use of the temperature-sensitive miscibility of hydrocarbon, silicone and fluorocarbon liquids, and is applied to both the microfluidic and the scalable batch production of complex droplets. We demonstrate that droplet geometries can be alternated between encapsulated and Janus configurations by varying the interfacial tensions using hydrocarbon and fluorinated surfactants including stimuli-responsive and cleavable surfactants. This yields a generalizable strategy for the fabrication of multiphase emulsions with controllably reconfigurable morphologies and the potential to create a wide range of responsive materials.
Collapse
Affiliation(s)
- Lauren D Zarzar
- Department of Chemistry and Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Vishnu Sresht
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Ellen M Sletten
- Department of Chemistry and Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Julia A Kalow
- Department of Chemistry and Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Daniel Blankschtein
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Timothy M Swager
- Department of Chemistry and Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| |
Collapse
|
22
|
Dutta R, Chakraborty S, Bose P, Ghosh P. Aerial CO
2
Trapped as CO
3
2–
Ions in a Dimeric Capsule That Efficiently Extracts Chromate, Sulfate, and Thiosulfate from Water by Anion‐Exchange Metathesis. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402139] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ranjan Dutta
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, 2A & 2B Raja S.C. Mullick Road, Kolkata 700032, India, http://www.iacs.res.in/inorg/icpg
| | - Sourav Chakraborty
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, 2A & 2B Raja S.C. Mullick Road, Kolkata 700032, India, http://www.iacs.res.in/inorg/icpg
| | - Purnandhu Bose
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, 2A & 2B Raja S.C. Mullick Road, Kolkata 700032, India, http://www.iacs.res.in/inorg/icpg
- Current address: Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, SPMS‐CBC‐02‐01, 21 Nanyang Link, 637371 Singapore
| | - Pradyut Ghosh
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, 2A & 2B Raja S.C. Mullick Road, Kolkata 700032, India, http://www.iacs.res.in/inorg/icpg
| |
Collapse
|
23
|
Bae J, Russell TP, Hayward RC. Osmotically Driven Formation of Double Emulsions Stabilized by Amphiphilic Block Copolymers. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201405229] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
24
|
Bae J, Russell TP, Hayward RC. Osmotically Driven Formation of Double Emulsions Stabilized by Amphiphilic Block Copolymers. Angew Chem Int Ed Engl 2014; 53:8240-5. [DOI: 10.1002/anie.201405229] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Indexed: 11/10/2022]
|
25
|
Vassileva P, Detcheva A, Uzunov I, Uzunova S. REMOVAL OF METAL IONS FROM AQUEOUS SOLUTIONS USING PYROLYZED RICE HUSKS: ADSORPTION KINETICS AND EQUILIBRIA. CHEM ENG COMMUN 2013. [DOI: 10.1080/00986445.2012.755519] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
26
|
Li X, Xu H, Kong F, Wang R. A Cationic Metal-Organic Framework Consisting of Nanoscale Cages: Capture, Separation, and Luminescent Probing of Cr2O72−through a Single-Crystal to Single-Crystal Process. Angew Chem Int Ed Engl 2013; 52:13769-73. [DOI: 10.1002/anie.201307650] [Citation(s) in RCA: 279] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Indexed: 11/10/2022]
|
27
|
Li X, Xu H, Kong F, Wang R. A Cationic Metal-Organic Framework Consisting of Nanoscale Cages: Capture, Separation, and Luminescent Probing of Cr2O72−through a Single-Crystal to Single-Crystal Process. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201307650] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
28
|
Krishna D, Sree RP. Artificial Neural Network and Response Surface Methodology Approach for Modeling and Optimization of Chromium (VI) Adsorption from Waste Water using Ragi Husk Powder. INDIAN CHEMICAL ENGINEER 2013. [DOI: 10.1080/00194506.2013.829257] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
29
|
Absorption of Cr(VI) onto amino-modified titanate nanotubes using 2-Bromoethylamine hydrobromide through SN2 reaction. J Colloid Interface Sci 2013; 401:133-40. [DOI: 10.1016/j.jcis.2013.03.037] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2013] [Revised: 03/21/2013] [Accepted: 03/24/2013] [Indexed: 02/01/2023]
|
30
|
Choi CH, Weitz DA, Lee CS. One step formation of controllable complex emulsions: from functional particles to simultaneous encapsulation of hydrophilic and hydrophobic agents into desired position. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2013; 25:2536-41. [PMID: 23526714 DOI: 10.1002/adma.201204657] [Citation(s) in RCA: 123] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2012] [Revised: 01/06/2013] [Indexed: 05/20/2023]
Abstract
This article presents a one-step method for generating complex emulsions that exploits the phase separation of the emulsion droplet generated in the microchannel. This approach easily produces double, triple, quadruple, and Janus emulsions with monodisperse size. These emulsions can be used as useful templates for the synthesis of new functional materials, such as microcapsules, hemispheres, Janus particles and microcarriers that are capable of simultaneously encapsulating hydrophilic and hydrophobic compounds with selective compartmentalization in a one-step process.
Collapse
Affiliation(s)
- Chang-Hyung Choi
- Department of Chemical Engineering, Chungnam National University, Yuseong-gu, Daejeon, 305-764, South Korea
| | | | | |
Collapse
|
31
|
|
32
|
Shi PF, Zhao B, Xiong G, Hou YL, Cheng P. Fast capture and separation of, and luminescent probe for, pollutant chromate using a multi-functional cationic heterometal-organic framework. Chem Commun (Camb) 2012; 48:8231-3. [DOI: 10.1039/c2cc33707j] [Citation(s) in RCA: 212] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
33
|
Al-Dujaili AH, Awwad AM, Salem NM. Biosorption of cadmium (II) onto loquat leaves (Eriobotrya japonica) and their ash from aqueous solution, equilibrium, kinetics, and thermodynamic studies. INTERNATIONAL JOURNAL OF INDUSTRIAL CHEMISTRY 2012. [DOI: 10.1186/2228-5547-3-22] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
34
|
Saha B, Orvig C. Biosorbents for hexavalent chromium elimination from industrial and municipal effluents. Coord Chem Rev 2010. [DOI: 10.1016/j.ccr.2010.06.005] [Citation(s) in RCA: 411] [Impact Index Per Article: 29.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
35
|
Kumbasar RA. Selective extraction and concentration of chromium(VI) from acidic solutions containing various metal ions through emulsion liquid membranes using Amberlite LA-2. J IND ENG CHEM 2010. [DOI: 10.1016/j.jiec.2010.05.004] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
36
|
Choudhury A, Sengupta S, Bhattacharjee C, Datta S. Extraction of Hexavalent Chromium from Aqueous Stream by Emulsion Liquid Membrane (ELM). SEP SCI TECHNOL 2010. [DOI: 10.1080/01496390903409617] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
37
|
Sahu JN, Acharya J, Meikap BC. Response surface modeling and optimization of chromium(VI) removal from aqueous solution using Tamarind wood activated carbon in batch process. JOURNAL OF HAZARDOUS MATERIALS 2009; 172:818-825. [PMID: 19748729 DOI: 10.1016/j.jhazmat.2009.07.075] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2008] [Revised: 03/26/2009] [Accepted: 07/18/2009] [Indexed: 05/28/2023]
Abstract
The present paper discusses response surface methodology (RSM) as an efficient approach for predictive model building and optimization of chromium adsorption on developed activated carbon. In this work the application of RSM is presented for optimizing the removal of Cr(VI) ions from aqua solutions using activated carbon as adsorbent. All experiments were performed according to statistical designs in order to develop the predictive regression models used for optimization. The optimization of adsorption of chromium on activated carbon was carried out to ensure a high adsorption efficiency at low adsorbent dose and high initial concentration of Cr(VI). While the goal of adsorption of chromium optimization was to improve adsorption conditions in batch process, i.e., to minimize the adsorbent dose and to increase the initial concentration of Cr(VI). In the adsorption experiments a laboratory developed Tamarind wood activated carbon made of chemical activation (zinc chloride) was used. A 2(4) full factorial central composite design experimental design was employed. Analysis of variance (ANOVA) showed a high coefficient of determination value (R(2)=0.928) and satisfactory prediction second-order regression model was derived. Maximum chromium removal efficiency was predicted and experimentally validated. The optimum adsorbent dose, temperature, initial concentration of Cr(VI) and initial pH of the Cr(VI) solution were found to be 4.3g/l, 32 degrees C, 20.15 mg/l and 5.41 respectively. Under optimal value of process parameters, high removal (>89%) was obtained for Cr(VI).
Collapse
Affiliation(s)
- J N Sahu
- Department of Chemical Engineering, Indian Institute of Technology, Kharagpur, PO Kharagpur Technology, West Bengal Pin 721302, India
| | | | | |
Collapse
|
38
|
Bansal M, Singh D, Garg VK. A comparative study for the removal of hexavalent chromium from aqueous solution by agriculture wastes' carbons. JOURNAL OF HAZARDOUS MATERIALS 2009; 171:83-92. [PMID: 19553015 DOI: 10.1016/j.jhazmat.2009.05.124] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2008] [Revised: 05/23/2009] [Accepted: 05/26/2009] [Indexed: 05/28/2023]
Abstract
This paper reports the feasibility of using agricultural waste and timber industry waste carbons to remove Cr(VI) from synthetic wastewater under different experimental conditions. For this, rice husk and saw dust have been used as adsorbent after sulphuric acid treatment. Effect of various process parameters, namely, pH, adsorbent dose, initial chromium concentration and contact time has been studied in batch systems. Maximum metal removal was observed at pH 2.0. The efficiencies of rice husk carbon (RHC) and saw dust carbon (SDC) for Cr(VI) removal were 91.75% and 94.33%, respectively for aqueous solutions (250 mg L(-1)) at 20 g L(-1) adsorbent dose. The experimental data was analyzed using Freundlich, Langmuir, Dubinin-Redushkevich (D-R) and Temkin isotherm models. It was found that Langmuir, D-R and Temkin models fitted well. The results revealed that the hexavalent chromium is considerably adsorbed on RHC and SDC and it could be an economical method for the removal of hexavalent chromium from aqueous systems. FTIR and SEM of the adsorbents were recorded in native and Cr(VI)-loaded state to explore the number and position of various functional groups available for Cr(VI) binding onto studied adsorbents and changes in adsorbent surface morphology. The surface area of RHC and SDC was 1.12 and 1.16 m(2)g(-1), respectively.
Collapse
Affiliation(s)
- Manjeet Bansal
- Department of Civil Engineering National Institute of Technology, Kurukshetra 136119, India
| | | | | |
Collapse
|
39
|
Zhao CX, Middelberg A. Microfluidic Mass-Transfer Control for the Simple Formation of Complex Multiple Emulsions. Angew Chem Int Ed Engl 2009; 48:7208-11. [DOI: 10.1002/anie.200902485] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
40
|
Zhao CX, Middelberg A. Microfluidic Mass-Transfer Control for the Simple Formation of Complex Multiple Emulsions. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200902485] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
41
|
Gupta S, Babu BV. Utilization of waste product (tamarind seeds) for the removal of Cr(VI) from aqueous solutions: equilibrium, kinetics, and regeneration studies. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2009; 90:3013-3022. [PMID: 19473746 DOI: 10.1016/j.jenvman.2009.04.006] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2008] [Revised: 03/12/2009] [Accepted: 04/16/2009] [Indexed: 05/27/2023]
Abstract
In the present study, an adsorbent was prepared from tamarind seeds and used after activation for the removal of Cr(VI) from aqueous solutions. The tamarind seeds were activated by treating them with concentrated sulfuric acid (98% w/w) at a temperature of 150 degrees C. The adsorption of Cr(VI) was found to be maximum at low values of initial pH in the range of 1-3. The adsorption process of Cr(VI) was tested with Langmuir, Freundlich, Redlich-Peterson, Koble-Corrigan, Tempkin, Dubinin-Radushkevich and Generalized isotherm models. Application of the Langmuir isotherm to the system yielded a maximum adsorption capacity of 29.7 mg/g at an equilibrium pH value ranging from 1.12 to 1.46. The adsorption process followed second-order kinetics and the corresponding rate constants obtained were 2.605 x 10(-3), 0.818 x 10(-3), 0.557 x 10(-3) and 0.811 x 10(-3) g/mg min(-1) for 50, 200, 300 and 400 mg/L of initial Cr(VI) concentration, respectively. The regenerated activated tamarind seeds showed more than 95% Cr(VI) removal of that obtained using the fresh activated tamarind seeds. A feasible solution is proposed for the disposal of the contaminants (acid and base solutions) containing high concentrations of Cr(VI) obtained during the regeneration (desorption) process.
Collapse
Affiliation(s)
- Suresh Gupta
- Chemical Engineering Group, Birla Institute of Technology and Science (BITS), Vidya Vihar Campus, Pilani 333 031, Rajasthan, India
| | | |
Collapse
|
42
|
Applicability of shrinking core model on the adsorption of heavy metals by clarified sludge from aqueous solution. ADSORPTION 2009. [DOI: 10.1007/s10450-009-9186-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
43
|
Sharma YC, Srivastava V, Singh VK, Kaul SN, Weng CH. Nano-adsorbents for the removal of metallic pollutants from water and wastewater. ENVIRONMENTAL TECHNOLOGY 2009; 30:583-609. [PMID: 19603705 DOI: 10.1080/09593330902838080] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Of the variety of adsorbents available for the removal of heavy and toxic metals, activated carbon has been the most popular. A number of minerals, clays and waste materials have been regularly used for the removal of metallic pollutants from water and industrial effluents. Recently there has been emphasis on the application of nanoparticles and nanostructured materials as efficient and viable alternatives to activated carbon. Carbon nanotubes also have been proved effective alternatives for the removal of metallic pollutants from aqueous solutions. Because of their importance from an environmental viewpoint, special emphasis has been given to the removal of the metals Cr, Cd, Hg, Zn, As, and Cu. Separation of the used nanoparticles from aqueous solutions and the health aspects of the separated nanoparticles have also been discussed. A significant number of the latest articles have been critically scanned for the present review to give a vivid picture of these exotic materials for water remediation.
Collapse
Affiliation(s)
- Y C Sharma
- Department of Applied Chemistry, Institute of Technology, Banaras Hindu University, Varanasi 221 005, India.
| | | | | | | | | |
Collapse
|
44
|
Naiya TK, Bhattacharya AK, Das SK. Adsorption of Cd(II) and Pb(II) from aqueous solutions on activated alumina. J Colloid Interface Sci 2009; 333:14-26. [DOI: 10.1016/j.jcis.2009.01.003] [Citation(s) in RCA: 298] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2008] [Revised: 12/09/2008] [Accepted: 01/03/2009] [Indexed: 10/21/2022]
|
45
|
Naiya TK, Bhattacharya AK, Mandal S, Das SK. The sorption of lead(II) ions on rice husk ash. JOURNAL OF HAZARDOUS MATERIALS 2009; 163:1254-64. [PMID: 18783880 DOI: 10.1016/j.jhazmat.2008.07.119] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2008] [Revised: 06/21/2008] [Accepted: 07/22/2008] [Indexed: 05/09/2023]
Abstract
Present study deals with the adsorption of Pb(II) from aqueous solution on rice husk ash. Rice husk is a by-product generally obtained from rice mill. Rice husk ash is a solid obtained after burning of rice husk. Batch studies were performed to evaluate the influences of various experimental parameters like pH, initial concentration, adsorbent dosage, contact time and the effect of temperature. Optimum conditions for Pb(II) removal were found to be pH 5, adsorbent dosage 5 g/L of solution and equilibrium time 1h. Adsorption of Pb(II) followed pseudo-second-order kinetics. The effective diffusion coefficient is of the order of 10(-10)m(2)/s. The equilibrium adsorption isotherm was better described by Freuindlich adsorption isotherm model. The adsorption capacity (q(max)) of rice husk ash for Pb(II) ions in terms of monolayer adsorption was 91.74 mg/g. The change of entropy (DeltaS(0)) and enthalpy (Delta H(0)) were estimated at 0.132 kJ/(mol K) and 28.923 kJ/mol respectively. The negative value of Gibbs free energy (Delta G(0)) indicates feasible and spontaneous adsorption of Pb(II) on rice husk ash. The value of the adsorption energy (E), calculated using Dubinin-Radushkevich isotherm, was 9.901 kJ/mol and it indicated that the adsorption process was chemical in nature. Application study was also carried out to find the suitability of the process in waste water treatment operation.
Collapse
Affiliation(s)
- Tarun Kumar Naiya
- Department of Chemical Engineering, University of Calcutta, 92 A P C Road, Kolkata 700009, India
| | | | | | | |
Collapse
|
46
|
Sari A, Tuzen M. Removal of Cr(VI) From Aqueous Solution by Turkish Vermiculite: Equilibrium, Thermodynamic and Kinetic Studies. SEP SCI TECHNOL 2008. [DOI: 10.1080/01496390802222657] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
47
|
Naiya T, Bhattacharya A, Das S. Removal of Cd(II) from aqueous solutions using clarified sludge. J Colloid Interface Sci 2008; 325:48-56. [DOI: 10.1016/j.jcis.2008.06.003] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2008] [Revised: 05/23/2008] [Accepted: 06/02/2008] [Indexed: 11/28/2022]
|
48
|
Pehlivan E, Altun T. Biosorption of chromium(VI) ion from aqueous solutions using walnut, hazelnut and almond shell. JOURNAL OF HAZARDOUS MATERIALS 2008; 155:378-384. [PMID: 18179865 DOI: 10.1016/j.jhazmat.2007.11.071] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2007] [Revised: 11/19/2007] [Accepted: 11/20/2007] [Indexed: 05/25/2023]
Abstract
The potential to remove Cr(VI) ion from aqueous solutions through biosorption using, the shells of Walnut (WNS) (Juglans regia), Hazelnut (HNS) (Corylus avellana) and Almond (AS) (Prunus dulcis) was investigated in batch experiments. The equilibrium adsorption level was determined to be a function of the solution contact time and concentration. Kinetic experiments revealed that the dilute chromium solutions reached equilibrium within 100 min. The biosorptive capacity of the shells was dependent on the pH of the chromium solution, with pH 3.5 being optimal. Adsorption of Cr(VI) ion uptake is in all cases pH-dependent showing a maximum at equilibrium pH values between 2.0 and 3.5, depending on the biomaterial, that correspond to equilibrium pH values of 3.5 for (WNS), 3.5 for (HNS) and 3.2 for (AS). The adsorption data fit well with the Langmuir isotherm model. The sorption process conformed to the Langmuir isotherm with maximum Cr(VI) ion sorption capacities of 8.01, 8.28, and 3.40 mg/g for WNS, HNS and AS, respectively. Percentage removal by WNS, HNS and AS was 85.32, 88.46 and 55.00%, respectively at a concentration of 0.5 mM. HNS presented the highest adsorption capacities for the Cr(VI) ion.
Collapse
Affiliation(s)
- Erol Pehlivan
- Department of Chemical Engineering, Selcuk University, Campus, 42079 Konya, Turkey.
| | | |
Collapse
|
49
|
Gode F, Atalay ED, Pehlivan E. Removal of Cr(VI) from aqueous solutions using modified red pine sawdust. JOURNAL OF HAZARDOUS MATERIALS 2008; 152:1201-7. [PMID: 17826899 DOI: 10.1016/j.jhazmat.2007.07.104] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2007] [Revised: 06/05/2007] [Accepted: 07/31/2007] [Indexed: 05/17/2023]
Abstract
The adsorption of Cr(VI) from aqueous solutions on sawdust (SD), base extracted sawdust (BESD) and tartaric acid modified sawdust (TASD) of Turkish red pine tree (Pinus nigra), a timber industry waste, was studied at varying Cr(VI) concentrations, adsorbent dose, modifier concentration and pH. Batch adsorption studies have been carried out. Sawdust was collected from waste timber industry and modified with various amount of tartaric acid (TA) (0.1-1.5M). The batch sorption kinetics has been tested and the applicability of the Langmuir and Freundlich adsorption isotherms for the present system has been tested at 25+/-2 degrees C. Under observed test conditions, the equilibrium adsorption data fits the linear Freundlich isotherms. An initial pH of 3.0 was most favorable for Cr(VI) removal by all adsorbents. Maximum Cr(VI) was sequestered from the solution within 120 min after the beginning for every experiment. The experimental result inferred that chelation and ion exchange is one of the major adsorption mechanisms for binding metal ions to the SD. Percentage removal of Cr(VI) was maximum at the initial pH of 3.0 (87.7, 70.6 and 55.2% by TASD, BESD, and SD, respectively). Adsorption capacities range from 8.3 to 22.6 mg/g for SD samples.
Collapse
Affiliation(s)
- Fethiye Gode
- Department of Chemistry, Suleyman Demirel University, 32260 Isparta, Turkey
| | | | | |
Collapse
|
50
|
Arslan G, Pehlivan E. Batch removal of chromium(VI) from aqueous solution by Turkish brown coals. BIORESOURCE TECHNOLOGY 2007; 98:2836-45. [PMID: 17113283 DOI: 10.1016/j.biortech.2006.09.041] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2006] [Revised: 08/29/2006] [Accepted: 09/27/2006] [Indexed: 05/11/2023]
Abstract
The ability of using low-rank Turkish brown coals (Ilgin: BC1, Beyşehir: BC2, and Ermenek: BC3) to remove Cr(VI) from aqueous solutions was studied as a function of contact time, solution pH, temperature, concentration of metal solutions and amount of adsorbent. Their sorption properties were compared with the activated carbon from Chemviron (AQ-30). Adsorption of Cr(VI) uptake is in all cases pH-dependent showing a maximum at equilibrium pH values between 2.0 and 3.2, depending on the biomaterial, that correspond to initial pH values of 2.3 units for BC1, 3.0 units for BC2 and 3.2 units for BC3 and AQ-30. Batch equilibrium tests showed that the Cr(VI) removal was fitted with Freundlich isotherm and the adsorption reached equilibrium in 80 min. It was proceeding effectively into a short acid pH interval (2.0-3.2) where processes of Cr(VI) sorption are maximized. It was observed that the maximum adsorption capacity of 11.2 mM of Cr(VI)/g for Ilgin (BC1), 12.4 mM of Cr(VI)/g for Beyşehir (BC2), 7.4 mM of Cr(VI)/g for Ermenek (BC3) and 6.8 mM of Cr(VI)/g for activated carbon (AQ-30) was achieved at pH of 3.0. The rise in temperature caused a slight decrease in the value of the equilibrium constant (K(c)) for the sorption of Cr(VI) ion. The Cr(VI) sorption capacities of Beyşehir and Ilgin brown coals were the same. Ermenek brown coals and activated carbon (AQ-30) showed a similar sorption capacity.
Collapse
Affiliation(s)
- Gulsin Arslan
- Department of Chemistry, Selcuk University, Campus, 42079 Konya, Turkey
| | | |
Collapse
|