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Çevik TN, Kivilcimdan Moral Ç. Zinc oxide nanoparticles encapsulated in alginate beads: a promising and recyclable adsorbent for simultaneous uptake of toxic metals. NANOTECHNOLOGY 2024; 35:345701. [PMID: 38776881 DOI: 10.1088/1361-6528/ad4ee9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Accepted: 05/22/2024] [Indexed: 05/25/2024]
Abstract
Heavy metal toxicity is a known problem and various methods are used for treatment. Adsorption has some advantages and it would be promising if environmentally friendly and cheap materials were utilized. Alginate and zinc oxide nanoparticles were selected and composite alginate beads were used for the removal of mixed metals from aqueous solutions. Batch and column experiments were conducted to determine some parameters' effects and the adsorbent's real application potential. According to the batch experiments, zinc oxide nanoparticles to alginate ratio of 0.5 g g-1, and pH levels nearby to the neutral range led to better metal removals. 0.5 ml min-1of flow rate supplied better metal removal efficiencies in columns, with the highest treatment as 86% of Pb2+. Acid treatment can be successfully applied for the regeneration of the adsorbent, at least three times only with a 4% reduction in the adsorption efficiency. Heavy metal uptake was compatible with the pseudo 2nd order model indicating chemisorption as a dominant mechanism. Also, the intraparticle diffusion model illustrated adsorption might govern more than one step. The Langmuir model had the best fit and suggested monolayer covering for Pb2+, 76.3 mg g-1. Alginate-based nanocomposite beads were useful for mixed metal removal and could be used.
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Affiliation(s)
- Tuğba Nur Çevik
- Department of Environmental Engineering, Akdeniz University, 07058 Antalya, Turkey
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2
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Ben Amar M, Mallek M, Valverde A, Monclús H, Myers TG, Salvadó V, Cabrera-Codony A. Competitive heavy metal adsorption on pinecone shells: Mathematical modelling of fixed-bed column and surface interaction insights. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 917:170398. [PMID: 38281636 DOI: 10.1016/j.scitotenv.2024.170398] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 01/10/2024] [Accepted: 01/22/2024] [Indexed: 01/30/2024]
Abstract
Pinecone shells are assessed as a cost-effective biosorbent for the removal of metal ions Pb(II), Cu(II), Cd(II), Ni(II), and Cr(VI) in a fixed-bed column. Influent concentration, bed height, and flowrate are studied to improve efficiency. The breakthrough data is well fitted by the Sips adsorption model, suggesting a surface complexation mechanism, with maximum adsorption capacities of 11.1 mg/g for Cu(II) and 66 mg/g for Pb(II). In multimetal solutions, the uptake sequence at breakthrough and saturation is Pb(II) > Cu(II) > Cd(II). Characterization via FTIR and XRD reveals carboxyl and hydroxyl functional groups interacting with metal ions. Ca(II) does not compete with Pb(II), Cu(II), and Cd(II) adsorption, highlighting the ability of pinecone to adsorb heavy metals via surface complexation. Its application in the treatment of industrial effluents containing Cu(II), Ni(II), and Cr(VI) is explored. The study investigates bed media regeneration via eluting adsorbed metal ions with hydrochloric acid solutions. The potential of pinecone shells as an efficient biosorbent for removing toxic metal ions from industrial wastewater is emphasized. These findings enhance our understanding of the adsorption mechanism and underscore the fixed-bed column system's applicability in real-world scenarios, addressing environmental concerns related to heavy metal contamination of industrial effluents.
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Affiliation(s)
- Marwa Ben Amar
- Laboratory of Material Sciences and Environment, Faculty of Science, University of Sfax, Tunisia
| | - Maryam Mallek
- Laboratory of Material Sciences and Environment, Faculty of Science, University of Sfax, Tunisia
| | - Abel Valverde
- Department of Chemical Engineering, Universitat Politècnica de Catalunya, 08028 Barcelona, Spain; Visiting Fellow, Mathematical Institute, University of Oxford, Oxford OX2 6GG, UK
| | - Hèctor Monclús
- LEQUIA (Institute of the Environment), University of Girona, C/M. Aurèlia Capmany, 69, Girona 17003, Spain
| | | | - Victoria Salvadó
- Department of Chemistry, Faculty of Science, University of Girona, M. Aurèlia Capmany, 69, 17003 Girona, Spain
| | - Alba Cabrera-Codony
- LEQUIA (Institute of the Environment), University of Girona, C/M. Aurèlia Capmany, 69, Girona 17003, Spain.
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Kim JH, Kwak E, Lee S. Performance expectation of coal waste in permeable reactive barrier for removal of cadmium considering contamination level and pore water velocity. CHEMOSPHERE 2023; 345:140387. [PMID: 37832884 DOI: 10.1016/j.chemosphere.2023.140387] [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: 07/26/2023] [Revised: 10/05/2023] [Accepted: 10/06/2023] [Indexed: 10/15/2023]
Abstract
The effectiveness and longevity of permeable reactive barriers (PRBs) depend on the performance of the reactive materials and the subsurface environment. The relationship of the groundwater velocity on performance of coal waste for the heavy metal removal was reported in our previous study. In this study, we investigated the performance and longevity of coal waste as a PRB material for the removal of Cd considering subsurface environmental conditions such as contamination level and groundwater velocity. The artificial groundwater contaminated by Cd were prepared with various concentrations ranging from 10 to 100 mg L-1. Lab-scale column experiments were conducted using coal waste filled columns by injecting the artificial groundwater. The breakthrough curves were analyzed advection dispersion equation coupled with equilibrium sorption model to determine the retardation factor. The Cd breakthrough curves exhibited different retardation with respect to the contamination levels. The Cd transport was more retarded as the contamination level lowered. The relationship between the retardation factor and the contamination levels could be explained with empirical equations based on non-linear sorption isotherms. By adopting the velocity dependency of sorbent performance in our previous study, transport of Cd within coal waste was simulated under various subsurface environmental conditions to construct the longevity function. The function could be used for the longevity prediction of coal waste as a PRB material considering groundwater velocity and contamination level in subsurface environment.
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Affiliation(s)
- Jae-Hyun Kim
- Department of Earth and Environmental Sciences, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea.
| | - Eunjie Kwak
- Department of Earth and Environmental Sciences, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea.
| | - Soonjae Lee
- Department of Earth and Environmental Sciences, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea.
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Water Cleaning by a Continuous Fixed-Bed Column for Cr(VI) Eco-Adsorption with Green Adsorbent-Based Biomass: An Experimental Modeling Study. Processes (Basel) 2023. [DOI: 10.3390/pr11020363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
In this study, chromate adsorption onto red peanut skin (RPS) was investigated in a fixed-bed column; FTIR, PZC, SEM, DLS, and BET were used to evaluate its adsorption properties. The experiments were conducted to determine the effect of physical parameters, including the inlet initial Cr(VI) concentration (100–500 mg L−1), bed height (10–20 cm), and feed flow rate (13.59–23.45 mL min−1). They were carried out to predict breakthrough curves. The adsorption capacity coefficients were determined using the most widely used Bohart–Adams model. It was tested to fit experimental data, for a better understand the dynamic behavior, and for further optimize column performance. It was found that the Cr(VI) uptake decreases when increasing the flow rate and that high chromate concentration and bed height consequently increase the column’s life span. A high column adsorption capacity can be achieved with a higher Cr(VI) concentration due to the higher driving force. The results indicated that the Bohart–Adams model provides a good description (R2 > 0.98) of the experimental data of the Cr(VI)’s removal from the aqueous solution on the RPS suggesting that the surface diffusion is the rate-limiting step in the continues adsorption process.. Breakthrough adsorption capacity is crucial for comparing RPS with other similar materials. Indeed, possible mechanisms have been suggested for illustrating adsorption onto RPS. The obtained results showed significant potential of 26.23 mg g−1 of RPS on Cr(VI) elimination at a natural pH of 5.35. Furthermore, this global investigation allowed for the design of a promising low-cost material for the future scale-up of cleaning wastewater polluted by metal and determine the properly conditions for operating column adsorption. This material provides an economical, efficient means of eliminating pollutants, thus meeting the main aims of the UN Sustainable Development Goals (UN SDGs).
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González-López ME, Laureano-Anzaldo CM, Pérez-Fonseca AA, Arellano M, Robledo-Ortíz JR. Chemically Modified Polysaccharides for Hexavalent Chromium Adsorption. SEPARATION AND PURIFICATION REVIEWS 2020. [DOI: 10.1080/15422119.2020.1783311] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
| | | | | | - Martín Arellano
- Departamento de Ingeniería Química, CUCEI, Universidad De Guadalajara, Jalisco, México
| | - Jorge Ramón Robledo-Ortíz
- Departamento de Madera, Celulosa y Papel, CUCEI, Universidad de Guadalajara, Zapopan, Jalisco, México
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Aranda-García E, Cristiani-Urbina E. Effect of pH on hexavalent and total chromium removal from aqueous solutions by avocado shell using batch and continuous systems. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:3157-3173. [PMID: 28963647 DOI: 10.1007/s11356-017-0248-z] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2017] [Accepted: 09/19/2017] [Indexed: 05/26/2023]
Abstract
Solution pH appears to be the most important regulator of the biosorptive removal of chromium ions from aqueous solutions. This work presents a kinetic study of the effects of solution pH on Cr(VI) and total chromium removal from aqueous solution by Hass avocado shell (HAS) in batch and continuous packed bed column systems. Different Cr(VI) and total chromium removal performances of HAS were obtained in pH-shift batch, pH-controlled batch, and continuous systems. These results emphasize the great importance of determining the most appropriate pH for Cr(VI) and total chromium removal, considering the operational mode of the proposed large-scale treatment system. Total chromium biosorption batch kinetics was well described by the Elovich model, whereas in the continuous system, the fitness of the kinetic models to the experimental data was pH dependent. X-ray photoelectron spectroscopy and kinetic studies clearly indicated that the reaction mechanism of Cr(VI) with HAS was the reductive biotransformation of Cr(VI) to Cr(III), which was partially released to the aqueous solution and partially biosorbed onto HAS.
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Affiliation(s)
- Erick Aranda-García
- Escuela Nacional de Ciencias Biológicas, Departamento de Ingeniería Bioquímica, Instituto Politécnico Nacional, Avenida Wilfrido Massieu s/n, Unidad Profesional Adolfo López Mateos, Delegación Gustavo A. Madero, 07738, Mexico City, Mexico
| | - Eliseo Cristiani-Urbina
- Escuela Nacional de Ciencias Biológicas, Departamento de Ingeniería Bioquímica, Instituto Politécnico Nacional, Avenida Wilfrido Massieu s/n, Unidad Profesional Adolfo López Mateos, Delegación Gustavo A. Madero, 07738, Mexico City, Mexico.
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Yüksel Ş, Orhan R. The Removal of Cr(VI) from Aqueous Solution by Activated Carbon Prepared from Apricot, Peach Stone and Almond Shell Mixture in a Fixed-Bed Column. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2018. [DOI: 10.1007/s13369-018-3618-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Removal of Cr (VI) with a spiral wound chitosan nanofiber membrane module via dead-end filtration. J Memb Sci 2017. [DOI: 10.1016/j.memsci.2017.09.045] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Sheikhmohammadi A, Mohseni SM, khodadadi R, Sardar M, Abtahi M, Mahdavi S, Keramati H, Dahaghin Z, Rezaei S, Almasian M, Sarkhosh M, Faraji M, Nazari S. Application of graphene oxide modified with 8-hydroxyquinoline for the adsorption of Cr (VI) from wastewater: Optimization, kinetic, thermodynamic and equilibrium studies. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.02.101] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Zhang L, Zeng Y, Cheng Z. Removal of heavy metal ions using chitosan and modified chitosan: A review. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2015.12.013] [Citation(s) in RCA: 490] [Impact Index Per Article: 61.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Khan SU, Zaidi R, Hassan SZ, Farooqi IH, Azam A. Application of Fe-Cu binary oxide nanoparticles for the removal of hexavalent chromium from aqueous solution. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2016; 74:165-175. [PMID: 27386994 DOI: 10.2166/wst.2016.172] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The adsorption process has been used as an effective technique for the removal of metal ions from aqueous solutions. Groundwater remediation by nanoparticles has received interest in recent years. In the present study, a binary metal oxide of Fe-Cu was prepared and used for the removal of hexavalent chromium from aqueous solution. Batch experiments were performed to investigate the effects of initial Cr (VI) concentration, dose of adsorbent, and pH of solution on the removal efficiency of Cr (VI). The prepared nanostructured Fe-Cu binary oxides were able to reduce the concentration of Cr (VI) in aqueous solution. Binary metal oxides nanoparticle exhibited an outstanding ability to remove Cr (VI) due to high surface area, low particle size, and high inherent activity. The percentage removal efficiency of Cr (VI) increased with nanoparticles doses (0.1 g L(-1)-2.5 g L(-1)), whereas it decreased with initial Cr (VI) concentration (1 mg L(-1)-25 mg L(-1)) and with pH (3-9). The Freundlich model was found to be the better fit for adsorption isotherm. The prepared nanomaterial was characterized using powder X-ray diffraction, scanning electron microscopy (SEM), and ultraviolet (UV)-visible spectroscopy. It showed that the Fe-Cu binary oxides were formed in single phase. SEM micrograph showed aggregates with many nano-sized particles. UV-visible spectroscopy showed quantum confinement effect.
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Affiliation(s)
- Saif Ullah Khan
- Environmental Engineering Section, Department of Civil Engineering, Aligarh Muslim University, Aligarh 202002, India E-mail:
| | - Rumman Zaidi
- Department of Applied Physics, Aligarh Muslim University, Aligarh 202002, India
| | - Saeikh Z Hassan
- Department of Petroleum Studies, Aligarh Muslim University, Aligarh 202002, India
| | - I H Farooqi
- Environmental Engineering Section, Department of Civil Engineering, Aligarh Muslim University, Aligarh 202002, India E-mail:
| | - Ameer Azam
- Department of Applied Physics, Aligarh Muslim University, Aligarh 202002, India
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Long Y, Li Q, Ni J, Xu F, Xu H. Treatment of metal wastewater in pilot-scale packed bed systems: efficiency of single- vs. mixed-mushrooms. RSC Adv 2015. [DOI: 10.1039/c5ra02409a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This study investigated the biosorption of heavy metals from industrial wastewater using mushrooms at small-sized pilot-scale.
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Affiliation(s)
- Yunchuan Long
- Key Laboratory of Bio-resources and Eco-environment (Ministry of Education)
- College of Life Science
- Sichuan University
- Chengdu
- China
| | - Qiao Li
- Key Laboratory of Bio-resources and Eco-environment (Ministry of Education)
- College of Life Science
- Sichuan University
- Chengdu
- China
| | - Jiangxia Ni
- Key Laboratory of Bio-resources and Eco-environment (Ministry of Education)
- College of Life Science
- Sichuan University
- Chengdu
- China
| | - Fei Xu
- Key Laboratory of Bio-resources and Eco-environment (Ministry of Education)
- College of Life Science
- Sichuan University
- Chengdu
- China
| | - Heng Xu
- Key Laboratory of Bio-resources and Eco-environment (Ministry of Education)
- College of Life Science
- Sichuan University
- Chengdu
- China
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Daoud W, Ebadi T, Fahimifar A. Removal of hexavalent chromium from aqueous solutions using micro zero-valent iron supported by bentonite layer. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2015; 71:667-674. [PMID: 25768212 DOI: 10.2166/wst.2014.493] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Hexavalent chromium Cr(VI) is of particular environmental concern due to its toxicity, mobility, and challenging removal from industrial wastewater. It is a strong oxidizing agent that is carcinogenic and mutagenic and diffuses quickly through soil and aquatic environments. Moreover, it does not form insoluble compounds in aqueous solutions; therefore, separation by precipitation is not feasible. While Cr(VI) oxyanions are very mobile and toxic in the environment, trivalent Cr(III) cations are the opposite and, like many metal cations, Cr(III) forms insoluble precipitates. Thus, reducing Cr(VI)-Cr(III) simplifies its removal from effluent and also reduces its toxicity and mobility. Permeable reactive barriers (PRBs) with zero-valent iron (ZVI) have been used to remediate contaminated groundwater with metals, but using ZVI in remediation of contaminated groundwater or wastewater is limited due to its lack of stability, easy aggregation, and difficulty in separation of iron from the treated solution. Thus, the technology used in the present study is developed to address these problems by placing a layer of bentonite after the PRB layer to remove iron from the treated water. The removal rates of Cr(VI) under different values of pH were investigated, and the results indicated the highest adsorption capacity at low pH.
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Affiliation(s)
- Waseem Daoud
- Department of Civil and Environmental Engineering, Amirkabir University of Technology (Tehran Polytechnic), Hafez St, Tehran 15875-4413, Iran E-mail:
| | - Taghi Ebadi
- Department of Civil and Environmental Engineering, Amirkabir University of Technology (Tehran Polytechnic), Hafez St, Tehran 15875-4413, Iran E-mail:
| | - Ahmad Fahimifar
- Department of Civil and Environmental Engineering, Amirkabir University of Technology (Tehran Polytechnic), Hafez St, Tehran 15875-4413, Iran E-mail:
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Breakthrough studies for Cr(VI) sorption from aqueous solution using exfoliated polypyrrole-organically modified montmorillonite clay nanocomposite. J IND ENG CHEM 2014. [DOI: 10.1016/j.jiec.2013.09.052] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Lan G, Hong X, Fan Q, Luo B, Shi P, Chen X. Removal of hexavalent chromium in wastewater by polyacrylamide modified iron oxide nanoparticle. J Appl Polym Sci 2014. [DOI: 10.1002/app.40945] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Guihong Lan
- College of Chemistry and Chemical Engineering; Southwest Petroleum University; Chengdu 610500 China
- State Key Laboratory of Oil Gas Reservoir Geology and Exploitation; Southwest Petroleum University; Chengdu 610500 China
| | - Xia Hong
- College of Chemistry and Chemical Engineering; Southwest Petroleum University; Chengdu 610500 China
| | - Qiang Fan
- College of Chemistry and Chemical Engineering; Southwest Petroleum University; Chengdu 610500 China
| | - Bing Luo
- College of Chemistry and Chemical Engineering; Southwest Petroleum University; Chengdu 610500 China
| | - Peng Shi
- College of Chemistry and Chemical Engineering; Southwest Petroleum University; Chengdu 610500 China
| | - Xiuli Chen
- College of Chemistry and Chemical Engineering; Southwest Petroleum University; Chengdu 610500 China
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Šillerová H, Komárek M, Chrastný V, Novák M, Vaněk A, Drábek O. Brewers draff as a new low-cost sorbent for chromium (VI): Comparison with other biosorbents. J Colloid Interface Sci 2013; 396:227-33. [DOI: 10.1016/j.jcis.2013.01.029] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2012] [Revised: 01/09/2013] [Accepted: 01/12/2013] [Indexed: 11/28/2022]
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17
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Silva AM, Cordeiro FCM, Cunha EC, Leão VA. Fixed-Bed and Stirred-Tank Studies of Manganese Sorption by Calcite Limestone. Ind Eng Chem Res 2012. [DOI: 10.1021/ie301752q] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Lezehari M, Baudu M, Bouras O, Basly JP. Fixed-bed column studies of pentachlorophenol removal by use of alginate-encapsulated pillared clay microbeads. J Colloid Interface Sci 2012; 379:101-6. [DOI: 10.1016/j.jcis.2012.04.054] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2012] [Revised: 04/16/2012] [Accepted: 04/17/2012] [Indexed: 10/28/2022]
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Kumar ASK, Kalidhasan S, Rajesh V, Rajesh N. Application of Cellulose-Clay Composite Biosorbent toward the Effective Adsorption and Removal of Chromium from Industrial Wastewater. Ind Eng Chem Res 2011. [DOI: 10.1021/ie201349h] [Citation(s) in RCA: 170] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- A. Santhana Krishna Kumar
- Department of Chemistry and ‡Department of Biological Sciences, Birla Institute of Technology and Science, Pilani-Hyderabad Campus, Jawahar Nagar, Shameerpet Mandal, R.R. Dist-500 078(AP), India
| | - S. Kalidhasan
- Department of Chemistry and ‡Department of Biological Sciences, Birla Institute of Technology and Science, Pilani-Hyderabad Campus, Jawahar Nagar, Shameerpet Mandal, R.R. Dist-500 078(AP), India
| | - Vidya Rajesh
- Department of Chemistry and ‡Department of Biological Sciences, Birla Institute of Technology and Science, Pilani-Hyderabad Campus, Jawahar Nagar, Shameerpet Mandal, R.R. Dist-500 078(AP), India
| | - N. Rajesh
- Department of Chemistry and ‡Department of Biological Sciences, Birla Institute of Technology and Science, Pilani-Hyderabad Campus, Jawahar Nagar, Shameerpet Mandal, R.R. Dist-500 078(AP), India
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Panda M, Bhowal A, Datta S. Removal of hexavalent chromium by biosorption process in rotating packed bed. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2011; 45:8460-8466. [PMID: 21819035 DOI: 10.1021/es2015346] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Removal of hexavalent chromium ions from an aqueous solution by crude tamarind (Tamarindus indica) fruit shell was examined in a rotating packed bed contactor by continuously recirculating a given volume of solution through the bed. Reduction of Cr(VI) to Cr(III) within the biosorbent appeared to be the removal mechanism. Depletion rate of Cr(VI) from, and release of reduced Cr(III) ions into the aqueous phase, was influenced by mass transfer resistance besides pH and packing depth. A mathematical model considering the reduction reaction to be irreversible and incorporating intraparticle and external phase mass transfer resistances represented the experimental data adequately. The study indicated that the limitations of fixed bed contactor operating under terrestrial gravity in intensifying mass transfer rates for this system can be overcome with rotating packed bed due to liquid flow under centrifugal acceleration.
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Affiliation(s)
- M Panda
- Department of Chemical Engineering, Jadavpur University , Kolkata 700032, India
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Adsorptive removal of Cr(III) from aqueous solution using tripolyphosphate cross-linked chitosan beads. J Radioanal Nucl Chem 2011. [DOI: 10.1007/s10967-011-1074-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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