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Khanghah FA, Karimi-Sabet J, Ghotbi C. Experimental study on the removal of Ca(II) from aqueous solution using a bulk liquid membrane with facilitated transport mechanism. Chem Eng Res Des 2023. [DOI: 10.1016/j.cherd.2023.01.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Rozhkovskaya A, Rajapakse J, Millar GJ. Synthesis of LTA zeolite beads using alum sludge and silica rich wastes. ADV POWDER TECHNOL 2021. [DOI: 10.1016/j.apt.2021.07.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Removal of calcium ions from aqueous solution by bovine serum albumin (BSA)-modified nanofiber membrane: Dynamic adsorption performance and breakthrough analysis. Biochem Eng J 2021. [DOI: 10.1016/j.bej.2021.108016] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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A facile process for enhanced rare earth elements separation from dilute solutions using N, N-di(2-ethylhexyl)-diglycolamide grafted polymer resin. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2019.116096] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Tian Q, Nakama S, Sasaki K. Immobilization of cesium in fly ash-silica fume based geopolymers with different Si/Al molar ratios. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 687:1127-1137. [PMID: 31412449 DOI: 10.1016/j.scitotenv.2019.06.095] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2019] [Revised: 05/21/2019] [Accepted: 06/06/2019] [Indexed: 06/10/2023]
Abstract
Geopolymers are considered as promising matrixes for waste solidification. However, the effects of the Si/Al molar ratio of geopolymer on the immobilization efficiencies for metal ions have not been fully studied and understood. In the present study, geopolymers with different Si/Al ratios were synthesized from coal fly ash and silica fume. Adsorption tests were conducted to evaluate their immobilization efficiencies for Cs+. The results indicated that geopolymer with low Si/Al ratio could have a better immobilization performance for Cs+ than that with high Si/Al ratio. High Si/Al ratio could contribute to a more compact structure of geopolymer. Each sorption process fitted better with the pseudo-second-order model, and all of them were governed by film diffusion. However, the diffusion mode was gradually closed to particle diffusion with the increase in the Si/Al ratio. Both Langmuir and Freundlich models could well fit the sorption data, and the free energy of each sorption process decreased with the increase in the Si/Al ratio according to D-R equation. The distribution of AlO4 tetrahedron in the geopolymer structure plays a significant role in the immobilization of Cs+. Low Si/Al ratio could result in that more AlO4 tetrahedrons distribute in the small rings (<eight-member), which has stronger locking effects on Cs+. However, high Si/Al ratio leads to the distribution of AlO4 tetrahedrons mainly in larger rings (≥eight-member), and this could contribute to the high leaching amount of Cs+. In addition, high-temperature treatment could contribute to the formation of nepheline or pollucite in geopolymer matrix. These minerals locked Cs+ in their structures, and the leaching amount of Cs+ was reduced correspondingly from high levels (26.36%, 27.26%, and 66.92%) to very low levels (0.67%, 0.53%, and 0.95%).
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Affiliation(s)
- Quanzhi Tian
- Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University, 744 Motooka, Nishiku, Fukuoka 819-0395, Japan.
| | - Shingo Nakama
- Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University, 744 Motooka, Nishiku, Fukuoka 819-0395, Japan
| | - Keiko Sasaki
- Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University, 744 Motooka, Nishiku, Fukuoka 819-0395, Japan.
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Li S, Zeng Z, Xue W. Kinetic and equilibrium study of the removal of reactive dye using modified walnut shell. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2019; 80:874-883. [PMID: 31746794 DOI: 10.2166/wst.2019.324] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Modified walnut shell (EAWNS) was prepared by reaction with epichlorohydrin and alkaline solution of aspartic acid and used to remove reactive dye (Reactive Brilliant Blue (KN-R)) from aqueous media. The isotherms, kinetics and thermodynamics of KN-R adsorption onto EAWNS were studied at 298-318 K. The isotherm data of KN-R adsorption onto EAWNS agreed closely with the Langmuir model. The theoretical monolayer adsorption capacity for KN-R was 224.42 mg/g at 318 K. The result from the Dubinin-Radushkevich model showed that the KN-R adsorption onto EAWNS is chemisorption. The adsorption rate of KN-R onto EAWNS conformed to the pseudo-second-order model. The diffusion mechanism was investigated by the intraparticle diffusion model. The mass-transfer coefficient calculated by the surface mass-transfer coefficient model was in range of 2.95 × 10-5 to 2.93 × 10-4cm/s. The thermodynamic results suggested that the adsorption of KN-R onto EAWNS is spontaneous and endothermic in nature. The design of a single-stage batch adsorption process based on EAWNS adsorbent was carried out. Furthermore, the recycled EAWNS maintains high adsorption capacity despite four cycles.
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Affiliation(s)
- Shenmaishang Li
- Institute of Chemical Engineering, East China University of Science and Technology, 200237 Shanghai, China E-mail:
| | - Zuoxiang Zeng
- Institute of Chemical Engineering, East China University of Science and Technology, 200237 Shanghai, China E-mail:
| | - Weilan Xue
- Institute of Chemical Engineering, East China University of Science and Technology, 200237 Shanghai, China E-mail:
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Tian Q, Sasaki K. Application of fly ash-based materials for stabilization/solidification of cesium and strontium. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:23542-23554. [PMID: 31203540 DOI: 10.1007/s11356-019-05612-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2019] [Accepted: 05/28/2019] [Indexed: 06/09/2023]
Abstract
Coal fly ash, as a solid waste produced from coal-fired power plants, was recycled for synthesis of zeolite A and geopolymer which were used for stabilization/solidification of Cs+ and Sr2+ from aqueous solutions. Specifically, the sorption data was successfully fitted by kinetic and thermodynamic models. The microstructure changes of zeolite A after loading Cs+ and Sr2+ were explored using XRD, FTIR, Raman, TG-DTA, and N2 adsorption/desorption isotherm. The solidification of the spent zeolites using geopolymer was conducted and evaluated. It was found that pseudo-second sorption mechanism was predominant and, according to the Boyd equation, film diffusion seemed to govern the sorption process. The maximum sorption capacities on Cs+ and Sr2+ based on Langmuir model were 2.12 and 1.93 mmol/g, respectively. During ion exchange with Cs+ and Sr2+, Cs+ was inclined to go through the window to occupy the position of eight-member ring, while the Sr2+ was more likely to replace the Na+ in the six-member ring, thereby easily leading to the different changes of zeolite structure. In addition, geopolymer could be a promising matrix for the treatment of radioactive waste because the leaching fraction greatly decreased after solidification by geopolymer. Therefore, the recycling of coal fly ash for radioactive waste disposal could achieve the concept of disposal waste with waste and recycling, which could greatly contribute to the sustainable development of society.
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Affiliation(s)
- Quanzhi Tian
- Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University, 744 Motooka, Fukuoka, Nishiku, 819-0395, Japan.
| | - Keiko Sasaki
- Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University, 744 Motooka, Fukuoka, Nishiku, 819-0395, Japan.
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Yan B, Niu CH. Adsorption behavior of norfloxacin and site energy distribution based on the Dubinin-Astakhov isotherm. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 631-632:1525-1533. [PMID: 29727976 DOI: 10.1016/j.scitotenv.2018.03.119] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 03/07/2018] [Accepted: 03/10/2018] [Indexed: 06/08/2023]
Abstract
Concerns about the water resources contaminated by fluoroquinolone antibiotics have prompted research on effective and efficient treatment technologies. In this work, adsorbents based on barley straw were characterized on morphology, surface functional groups, and charge states for the adsorption of norfloxacin, a representative of fluoroquinolone antibiotics, from aqueous solutions. The effects of solution pH were studied, and high norfloxacin adsorption capacities of pretreated barley straw were achieved in a wide pH range (2.90-10.50), which were much higher than those of raw barley straw. The adsorbent was also able to remove norfloxacin from low to high concentration range, demonstrating its capability for norfloxacin removal from water bodies. The electron-donor-acceptor interactions were proposed as one of the main adsorption mechanisms. The adsorption kinetic data achieved at a range of concentrations were well described by the pseudo-second-order kinetic model. The adsorption equilibrium data were reasonably well-fitted by the Dubinin-Astakhov model, and a site energy distribution function based on the Dubinin-Astakhov model was determined. With higher site energies, the pretreated barley straw demonstrated a much stronger adsorption affinity for norfloxacin than raw barley straw.
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Affiliation(s)
- Bei Yan
- School of Environment and Sustainability, University of Saskatchewan, 117 Science Place, Saskatoon, Saskatchewan S7N 5C8, Canada
| | - Catherine Hui Niu
- Department of Chemical and Biological Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, Saskatchewan S7N 5A9, Canada; School of Environment and Sustainability, University of Saskatchewan, 117 Science Place, Saskatoon, Saskatchewan S7N 5C8, Canada.
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Sun H, Sun Z, Shen B, Liu J, Li G, Wu D, Zhang Y. One-pot synthesis of binderless zeolite A spheres via in situ
hydrothermal conversion of silica gel precursors. AIChE J 2018. [DOI: 10.1002/aic.16200] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Hui Sun
- School of Chemical Engineering, Petroleum Processing Research Center, East China University of Science and Technology; Shanghai 200237 China
- State Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 China
| | - Zhongwei Sun
- School of Chemical Engineering, Petroleum Processing Research Center, East China University of Science and Technology; Shanghai 200237 China
- State Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 China
| | - Benxian Shen
- School of Chemical Engineering, Petroleum Processing Research Center, East China University of Science and Technology; Shanghai 200237 China
- State Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 China
| | - Jichang Liu
- School of Chemical Engineering, Petroleum Processing Research Center, East China University of Science and Technology; Shanghai 200237 China
- State Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 China
| | - Gengnan Li
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering; Washington State University; Pullman WA 99163
| | - Di Wu
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering; Washington State University; Pullman WA 99163
- Dept. of Chemistry; Washington State University; Pullman WA 99163
- Dept. of Materials Science and Engineering; Washington State University; Pullman WA 99163
| | - Yuxin Zhang
- School of Chemical Engineering, Petroleum Processing Research Center, East China University of Science and Technology; Shanghai 200237 China
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Huang Y, Farooq MU, Lai S, Feng X, Sampranpiboon P, Wang X, Huang W. Model fitting of sorption kinetics data: Misapplications overlooked and their rectifications. AIChE J 2017. [DOI: 10.1002/aic.16051] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Yifeng Huang
- Dept. of Chemical EngineeringUniversity of WaterlooWaterloo Ontario, N2L 3G1 Canada
| | - Muhammad U. Farooq
- Dept. of Chemical EngineeringUniversity of WaterlooWaterloo Ontario, N2L 3G1 Canada
| | - Shuixiu Lai
- Dept. of Chemical EngineeringUniversity of WaterlooWaterloo Ontario, N2L 3G1 Canada
| | - Xianshe Feng
- Dept. of Chemical EngineeringUniversity of WaterlooWaterloo Ontario, N2L 3G1 Canada
| | | | - Xiaodong Wang
- Key Laboratory of Coal Science and TechnologyTaiyuan University of TechnologyTaiyuan China
| | - Wei Huang
- Key Laboratory of Coal Science and TechnologyTaiyuan University of TechnologyTaiyuan China
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Han YL, Lo YC, Cheng CL, Yu WJ, Nagarajan D, Liu CH, Li YH, Chang JS. Calcium ion adsorption with extracellular proteins of thermophilic bacteria isolated from geothermal sites—A feasibility study. Biochem Eng J 2017. [DOI: 10.1016/j.bej.2016.09.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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