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Chauhan K, Singh P, Sen K, Singhal RK, Thakur VK. Recent Advancements in the Field of Chitosan/Cellulose-Based Nanocomposites for Maximizing Arsenic Removal from Aqueous Environment. ACS OMEGA 2024; 9:27766-27788. [PMID: 38973859 PMCID: PMC11223156 DOI: 10.1021/acsomega.3c09713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 05/27/2024] [Accepted: 06/05/2024] [Indexed: 07/09/2024]
Abstract
Water remediation, acknowledged as a significant scientific topic, guarantees the safety of drinking water, considering the diverse range of pollutants that can contaminate it. Among these pollutants, arsenic stands out as a particularly severe threat to human health, significantly compromising the overall quality of life. Despite widespread awareness of the harmful effects of arsenic poisoning, there remains a scarcity of literature on the utilization of biobased polymers as sustainable alternatives for comprehensive arsenic removal in practical concern. Cellulose and chitosan, two of the most prevalent biopolymers in nature, provide a wide range of potential benefits in cutting-edge industries, including water remediation. Nanocomposites derived from cellulose and chitosan offer numerous advantages over their larger equivalents, including high chelating properties, cost-effective production, strength, integrity during usage, and the potential to close the recycling loop. Within the sphere of arsenic remediation, this Review outlines the selection criteria for novel cellulose/chitosan-nanocomposites, such as scalability in synthesis, complete arsenic removal, and recyclability for technical significance. Especially, it aims to give an overview of the historical development of research in cellulose and chitosan, techniques for enhancing their performance, the current state of the art of the field, and the mechanisms underlying the adsorption of arsenic using cellulose/chitosan nanocomposites. Additionally, it extensively discusses the impact of shape and size on adsorbent efficiency, highlighting the crucial role of physical characteristics in optimizing performance for practical applications. Furthermore, this Review addresses regeneration, reuse, and future prospects for chitosan/cellulose-nanocomposites, which bear practical relevance. Therefore, this Review underscores the significant research gap and offers insights into refining the structural features of adsorbents to improve total inorganic arsenic removal, thereby facilitating the transition of green-material-based technology into operational use.
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Affiliation(s)
- Kalpana Chauhan
- Chemistry
under School of Engineering and Technology, Central University of Haryana, Mahendragarh, Haryana 123031, India
| | - Prem Singh
- Shoolini
University, Solan, Himachal Pradesh 173229, India
| | - Kshipra Sen
- Shoolini
University, Solan, Himachal Pradesh 173229, India
| | - Rakesh Kumar Singhal
- Analytical
Chemistry Division, Bhabha Atomic Research
Centre, Mumbai 400085, India
| | - Vijay Kumar Thakur
- Biorefining
and Advanced Materials Research Centre, Scotland’s Rural College (SRUC), Kings Buildings, West Mains Road, Edinburgh EH9 3JG, United Kingdom
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2
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Chen M, Liu D, Liu T, Wei T, Qiao Q, Yuan Y, Wang N. Constructing 2D Polyphenols-Based Crosslinked Networks for Ultrafast and Selective Uranium Extraction from Seawater. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2401528. [PMID: 38634219 DOI: 10.1002/smll.202401528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 04/08/2024] [Indexed: 04/19/2024]
Abstract
The role of tannins (TA), a well-known abundant and ecologically friendly chelating ligand, in metal capture has long been studied. Different kinds of TA-containing adsorbents are synthesized for uranium capture, while most adsorbents suffer from unfavorable adsorption kinetics. Herein, the design and preparation of a TA-containing 2D crosslinked network adsorbent (TANP) is reported. The ≈1.8-nanometer-thick TANP films curl up into micrometer-scale pores, which contribute to fast mass transfer and full exposure of active sites. The coordination environment of uranyl (UO2 2+) ions is explored by integrated analysis of U L3-edge XANES and EXAFS. Density functional theory calculations indicate the energetically favorable UO2 2+ binding. Consequently, TANP with excellent adsorption kinetics presents a high uranium capture capacity (14.62 mg-U g-Ads-1) and a high adsorption rate (0.97 mg g-1 day-1) together with excellent selectivity and biofouling resistance. Life cycle assessment and cost analysis demonstrate that TANP has tremendous potential for application in industrial-scale uranium extraction from seawater.
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Affiliation(s)
- Mengwei Chen
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, 570228, P. R. China
| | - Dan Liu
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, 570228, P. R. China
| | - Tao Liu
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, 570228, P. R. China
| | - Tao Wei
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, 570228, P. R. China
| | - Qingtian Qiao
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, 570228, P. R. China
| | - Yihui Yuan
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, 570228, P. R. China
| | - Ning Wang
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, 570228, P. R. China
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Billah REK, Azoubi Z, López-Maldonado EA, Majdoubi H, Lgaz H, Lima EC, Shekhawat A, Tamraoui Y, Agunaou M, Soufiane A, Jugade R. Multifunctional Cross-Linked Shrimp Waste-Derived Chitosan/MgAl-LDH Composite for Removal of As(V) from Wastewater and Antibacterial Activity. ACS OMEGA 2023; 8:10051-10061. [PMID: 36969446 PMCID: PMC10034834 DOI: 10.1021/acsomega.2c07391] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 02/24/2023] [Indexed: 06/18/2023]
Abstract
This work synthesized a novel chitosan-loaded MgAl-LDH (LDH = layered double hyroxide) nanocomposite, which was physicochemically characterized, and its performance in As(V) removal and antimicrobial activity was evaluated. Chitosan-loaded MgAl-LDH nanocomposite (CsC@MgAl-LDH) was prepared using cross-linked natural chitosan from shrimp waste and modified by Mg-Al. The main mechanisms predominating the separation of As(V) were elucidated. The characteristic changes confirming MgAl-LDH modification with chitosan were analyzed through Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis-differential thermal analysis, and Brunauer-Emmett-Teller measurements. Porosity and the increased surface area play an important role in arsenic adsorption and microbial activity. Adsorption kinetics follows the general order statistically confirmed by Bayesian Information Criterion differences. To understand the adsorption process, Langmuir, Freundlich, and Liu isotherms were studied at three different temperatures. It was found that Liu's isotherm model was the best-fitted model. CsC@MgAl-LDH showed the maximum adsorption capacity of 69.29 mg g-1 toward arsenic at 60 °C. It was observed that the adsorption capacity of the material rose with the increase in temperature. The spontaneous behavior and endothermic nature of adsorption was confirmed by the thermodynamic parameters study. Minimal change in percentage removal was observed with coexisting ions. The regeneration of material and adsorption-desorption cycles revealed that the adsorbent is economically efficient. The nanocomposite was very effective against Staphylococcus aureus and Bacillus subtilus.
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Affiliation(s)
- Rachid El Kaim Billah
- Department
of Chemistry, Faculty of Sciences, Laboratory of Coordination and
Analytical Chemistry, University of Chouaib
Doukkali, El Jadida 24000, Morocco
| | - Zineb Azoubi
- Laboratory
of Physiopathology and Molecular Genetics, Faculty of Sciences Ben
M’Sick, Hassan II University of Casablanca, Casablanca 20450, Morocco
| | - Eduardo Alberto López-Maldonado
- Faculty
of Chemical Sciences and Engineering, Autonomous
University of Baja, California, CP, Tijuana 22390, Baja
California, Mexico
| | - Hicham Majdoubi
- Materials
Science energy and Nanoengineering Department (MSN), Mohammed VI Polytechnic University (UM6P), Lot 660-Hay Moulay Rachid, Benguerir 43150, Morocco
| | - Hassane Lgaz
- Innovative
Durable Building and Infrastructure Research Center, Center for Creative
Convergence Education, Hanyang University-ERICA, 55 Hanyangdaehak-ro, Sangrok-gu, Ansan-si, Gyeonggi-do 15588, Republic of Korea
| | - Eder C. Lima
- Institute
of Chemistry, Federal University of Rio
Grande do Sul, Porto
Alegre 91501-970, RS, Brazil
| | - Anita Shekhawat
- Department
of Chemistry, RTM Nagpur University, Nagpur 440033, India
| | - Youssef Tamraoui
- Materials
Science energy and Nanoengineering Department (MSN), Mohammed VI Polytechnic University (UM6P), Lot 660-Hay Moulay Rachid, Benguerir 43150, Morocco
| | - Mahfoud Agunaou
- Department
of Chemistry, Faculty of Sciences, Laboratory of Coordination and
Analytical Chemistry, University of Chouaib
Doukkali, El Jadida 24000, Morocco
| | - Abdessadik Soufiane
- Department
of Chemistry, Faculty of Sciences, Laboratory of Coordination and
Analytical Chemistry, University of Chouaib
Doukkali, El Jadida 24000, Morocco
| | - Ravin Jugade
- Department
of Chemistry, RTM Nagpur University, Nagpur 440033, India
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Pillai RR, Sreelekshmi PB, Meera AP. Biofabricated copper ferrite nanoparticles: a potential nanosorbent for the removal of Pb (II) ions from aqueous media. NANOTECHNOLOGY 2023; 34:225501. [PMID: 36827701 DOI: 10.1088/1361-6528/acbeb7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 02/23/2023] [Indexed: 06/18/2023]
Abstract
In the present study, we describe a facile strategy for the easy removal of the heavy metal ion, Pb (II) using biosynthesized copper ferrite (CuFe2O4) Nanoparticles (Nps) prepared via a cost-effective and eco-friendly method usingPimenta dioicaleaf extract. The structural characterization was performed using UV-Visible, FT-IR, XRD, XPS, TG, SEM - EDS and TEM techniques. Various characterization techniques showed that the biosynthesized CuFe2O4nanoparticles have spherical shape with minimum aggregation and possess a size range between 7 and 16 nm. Batch experiments were carried out to analyze the adsorption efficiency of CuFe2O4Nps by varying different experimental conditions such as pH, adsorbent dose and initial metal ion concentration. From the atomic absorption spectroscopy results, the optimum removal efficiency (99.69%) occurred at a contact time of 90 min in the solution having pH 6 with 0.06 g of nanoadsorbent. The experimental data were analyzed using adsorption isotherm and fitted with kinetic models. In the present study, we report the the highest removal efficiency of 99.69% for Pb (II) ions with minimum experimental parameters which is greater than other similar reported studies. The novel CuFe2O4nanosorbent synthesized in the present study is highly effective in eliminating toxic pollutants. They also possess outstanding recycling characteristics for the effective removal of Pb (II) ions from aqueous media.This cost-effective and ecofriendly strategy could be utilized for addressing the emerging water contamination.
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Affiliation(s)
- Reshma R Pillai
- Research and Post Graduate Department of Chemistry & Polymer Chemistry, K.S.M.D.B College, (Affiliated to University of Kerala), Sasthamcotta, Kollam, Kerala, 690 521, India
| | - P B Sreelekshmi
- Research and Post Graduate Department of Chemistry & Polymer Chemistry, K.S.M.D.B College, (Affiliated to University of Kerala), Sasthamcotta, Kollam, Kerala, 690 521, India
| | - A P Meera
- Research and Post Graduate Department of Chemistry & Polymer Chemistry, K.S.M.D.B College, (Affiliated to University of Kerala), Sasthamcotta, Kollam, Kerala, 690 521, India
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Ionic gelation synthesis, characterization and adsorption studies of cross-linked chitosan-tripolyphosphate (CS-TPP) nanoparticles for removal of As (V) ions from aqueous solution: kinetic and isotherm studies. TOXIN REV 2022. [DOI: 10.1080/15569543.2021.1933532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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6
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El Kaim Billah R, Aminul Islam M, Lgaz H, Lima EC, Abdellaoui Y, Rakhila Y, Goudali O, Majdoubi H, Alrashdi AA, Agunaou M, Soufiane A. Shellfish waste-derived mesoporous chitosan for impressive removal of arsenic(V) from aqueous solutions: A combined experimental and computational approach. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
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7
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Kebede A, Kedir K, Melak F, Asere TG. Removal of Cr(VI) from Aqueous Solutions Using Biowastes: Tella Residue and Pea ( Pisum sativum) Seed Shell. ScientificWorldJournal 2022; 2022:7554133. [PMID: 35125975 PMCID: PMC8816600 DOI: 10.1155/2022/7554133] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 12/28/2021] [Accepted: 01/07/2022] [Indexed: 12/17/2022] Open
Abstract
The wide use of chromium (Cr) in different industries led to the release of a considerable amount of Cr(VI) into water bodies. Exposure to Cr(VI) can cause diseases in humans and animals. Therefore, low-cost technology for Cr(VI) removal is required. In this study, the biowastes, "Tella" residue (TR) and Pea (Pisum sativum) seed shell (PSS), were evaluated for their Cr(VI) removal efficiency from aqueous solutions. The physicochemical properties of adsorbents were studied, and the adsorbents were further characterized using FTIR and XRD. Batch adsorption experiments have shown that the Cr(VI) uptake was pH-dependent and found to be effective in a wide range of pH values (pH 1 to 10) for PSS. The kinetics of Cr(VI) removal by the adsorbents was well expressed by the pseudo-second-order model. The experimental equilibrium adsorption data fitted well with Freundlich isotherm indicating multilayers adsorption. The estimated Cr(VI) adsorption capacities of TR and PSS were 15.6 mg/g and 8.5 mg/g, respectively. On top of this, the possibility of reusing adsorbents indicates the potential applicability of TR and PSS for the treatment of Cr(VI) contaminated water. Further study on the evaluation of the efficiency of the adsorbents using real chromium-contaminated wastewater is recommended.
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Affiliation(s)
- Abayneh Kebede
- Chemistry, College of Natural Sciences, Jimma University, P. O. Box 378, Jimma, Ethiopia
| | - Kassim Kedir
- Chemistry, College of Natural Sciences, Jimma University, P. O. Box 378, Jimma, Ethiopia
| | - Fekadu Melak
- Chemistry, College of Natural Sciences, Jimma University, P. O. Box 378, Jimma, Ethiopia
| | - Tsegaye Girma Asere
- Chemistry, College of Natural Sciences, Jimma University, P. O. Box 378, Jimma, Ethiopia
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8
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García-García JJ, Gómez-Espinosa RM, Rangel RN, Romero RR, Morales GR. New material for arsenic (V) removal based on chitosan supported onto modified polypropylene membrane. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:1909-1916. [PMID: 34363155 DOI: 10.1007/s11356-021-15725-1] [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: 03/16/2021] [Accepted: 07/26/2021] [Indexed: 06/13/2023]
Abstract
This paper presents a new material easily synthesized and with low cost, with the possibility of remove arsenic and the potential capability for the remediate water bodies. In this work, the efficiency in removing arsenic of the chitosan, supported onto modified polypropylene membrane, was studied using an aqueous As(V) solution of 0.4 mg/L, achieving a removal efficiency of 75%, which corresponds to an adsorption capacity of 0.031 mg/g. The As(V) adsorption depends on pH and the degree of chitosan grafting on the polypropylene membrane. A pseudo-second-order equation describes the adsorption of the membrane, classifying it as a chemisorption process. The chitosan supported on the membrane was characterized by the analysis of wettability, FT-IR-ATR, SEM-EDS, XRD powder, and surface charge. The As ions coordinate to the chitosan polar groups, allowing their removal from the aqueous solution.
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Affiliation(s)
- José Juan García-García
- Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM, km 14.5 Carretera Toluca-Atlacomulco, San Cayetano, 50200, Toluca, MEX, México
| | - Rosa María Gómez-Espinosa
- Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM, km 14.5 Carretera Toluca-Atlacomulco, San Cayetano, 50200, Toluca, MEX, México.
| | - Reyna Natividad Rangel
- Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM, km 14.5 Carretera Toluca-Atlacomulco, San Cayetano, 50200, Toluca, MEX, México
| | - Rubí Romero Romero
- Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM, km 14.5 Carretera Toluca-Atlacomulco, San Cayetano, 50200, Toluca, MEX, México
| | - Gabriela Roa Morales
- Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM, km 14.5 Carretera Toluca-Atlacomulco, San Cayetano, 50200, Toluca, MEX, México
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Arsenic removal approaches: A focus on chitosan biosorption to conserve the water sources. Int J Biol Macromol 2021; 192:1196-1216. [PMID: 34655588 DOI: 10.1016/j.ijbiomac.2021.10.050] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 10/03/2021] [Accepted: 10/06/2021] [Indexed: 12/20/2022]
Abstract
Globally, millions of people have no access to clean drinking water and are either striving for that or oppressed to intake polluted water. Arsenic is considered one of the most hazardous contaminants in water bodies that reaches there due to various natural and anthropogenic activities. Modified chitosan has gained much attention from researchers due to its potential for arsenic removal. This review focuses on the need and potential of chitosan-based biosorbents for arsenic removal from water systems. Chitosan is a low-cost, abundant, biodegradable biopolymer that possesses unique structural aspects and functional sites for the adsorption of contaminants like arsenic species from contaminated water. The chitosan-based biosorbents had also been modified using various techniques to enhance their arsenic removal efficiencies. This article reviews various forms of chitosan and parameters involved in chitosan modification which eventually affect the arsenic removal efficiency of the resultant sorbents. The literature revealed that the modified chitosan-based sorbents could express higher adsorption efficiency compared to those prepared from native chitosan. The sustainability of the chitosan-based sorbents has also been considered in terms of reusability. Finally, some recommendations have been underlined for further improvements in this domain.
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Enhanced Defluoridation of Water Using Zirconium-Coated Pumice in Fixed-Bed Adsorption Columns. MATERIALS 2021; 14:ma14206145. [PMID: 34683738 PMCID: PMC8540653 DOI: 10.3390/ma14206145] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 10/11/2021] [Accepted: 10/13/2021] [Indexed: 12/07/2022]
Abstract
Millions of people across the globe suffer from health issues related to high fluoride levels in drinking water. The purpose of this study was to test modified pumice as an adsorbent for the purification of fluoride-containing waters. The adsorption of fluoride onto zirconium-coated pumice (Zr–Pu) adsorbent was examined in fixed-bed adsorption columns. The coating of zirconium on the surface of VPum was revealed by X-ray diffractometer (XRD), Inductively coupled plasma-optical emission spectroscopy (ICP-EOS), and X-ray fluorescence (XRF) techniques. The degree of surface modification with the enhanced porosity of Zr–Pu was evident from the recorded scanning electron microscope (SEM) micrographs. The Brunauer-Emmett-Teller (BET) analysis confirmed the enhancement of the specific surface area of VPum after modification. The Fourier transform infrared (FTIR) examinations of VPum and Zr–Pu before and after adsorption did not reveal any significant spectrum changes. The pH drift method showed that VPum and Zr–Pu have positive charges at pHPZC lower than 7.3 and 6.5, respectively. Zr–Pu yielded a higher adsorption capacity of 225 mg/kg (2.05 times the adsorption capacity of VPum: 110 mg/kg), at pH = 2 and volumetric flow rate (QO) of 1.25 mL/min. Breakthrough time increases with decreasing pH and flow rate. The experimental adsorption data was well-matched by the Thomas and Adams-Bohart models with correlation coefficients (R2) of ≥ 0.980 (Zr–Pu) and ≥ 0.897 (VPum), confirming that both models are suitable tools to design fixed-bed column systems using volcanic rock materials. Overall, coating pumice with zirconium improved the defluoridation capacity of pumice; hence, a Zr–Pu-packed fixed-bed can be applied for defluoridation of excess fluoride from groundwater. However, additional investigations on, for instance, the influences of competing ions are advisable to draw explicit conclusions.
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Baranwal K, Dwivedi LM, Siddique S, Tiwari S, Singh V. Chitosan Grown Copper Doped Nickel Oxide Nanoparticles: An Excellent Catalyst for Reduction of Nitroarenes. J CLUST SCI 2021. [DOI: 10.1007/s10876-020-01861-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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12
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Adsorptive Removal of Phosphate from Aqueous Solutions Using Low-Cost Volcanic Rocks: Kinetics and Equilibrium Approaches. MATERIALS 2021; 14:ma14051312. [PMID: 33803351 PMCID: PMC7967176 DOI: 10.3390/ma14051312] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 02/23/2021] [Accepted: 03/01/2021] [Indexed: 01/09/2023]
Abstract
The contamination of surface and groundwater with phosphate originating from industrial and household wastewater remains a serious environmental issue in low-income countries. Herein, phosphate removal from aqueous solutions was studied using low-cost volcanic rocks such as pumice (VPum) and scoria (VSco), obtained from the Ethiopian Great Rift Valley. Batch adsorption experiments were conducted using phosphate solutions with concentrations of 0.5 to 25 mg·L−1 to examine the adsorption kinetic as well as equilibrium conditions. The experimental adsorption data were tested by employing various equilibrium adsorption models, and the Freundlich and Dubinin-Radushkevich (D-R) isotherms best depicted the observations. The maximum phosphate adsorption capacities of VPum and VSco were calculated and found to be 294 mg·kg−1 and 169 mg·kg−1, respectively. A pseudo-second-order kinetic model best described the experimental data with a coefficient of correlation of R2 > 0.99 for both VPum and VSco; however, VPum showed a slightly better selectivity for phosphate removal than VSco. The presence of competitive anions markedly reduced the removal efficiency of phosphate from the aqueous solution. The adsorptive removal of phosphate was affected by competitive anions in the order: HCO3− >F− > SO4−2 > NO3− > Cl− for VPum and HCO3− > F− > Cl− > SO4−2 > NO3− for VSco. The results indicate that the readily available volcanic rocks have a good adsorptive capacity for phosphate and shall be considered in future studies as test materials for phosphate removal from water in technical-scale experiments.
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Volcanic Rock Materials for Defluoridation of Water in Fixed-Bed Column Systems. Molecules 2021; 26:molecules26040977. [PMID: 33673208 PMCID: PMC7918344 DOI: 10.3390/molecules26040977] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 02/06/2021] [Accepted: 02/08/2021] [Indexed: 12/07/2022] Open
Abstract
Consumption of drinking water with a high concentration of fluoride (>1.5 mg/L) causes detrimental health problems and is a challenging issue in various regions around the globe. In this study, a continuous fixed-bed column adsorption system was employed for defluoridation of water using volcanic rocks, virgin pumice (VPum) and virgin scoria (VSco), as adsorbents. The XRD, SEM, FTIR, BET, XRF, ICP-OES, and pH Point of Zero Charges (pHPZC) analysis were performed for both adsorbents to elucidate the adsorption mechanisms and the suitability for fluoride removal. The effects of particle size of adsorbents, solution pH, and flow rate on the adsorption performance of the column were assessed at room temperature, constant initial concentration, and bed depth. The maximum removal capacity of 110 mg/kg for VPum and 22 mg/kg for VSco were achieved at particle sizes of 0.075-0.425 mm and <0.075 mm, respectively, at a low solution pH (2.00) and flow rate (1.25 mL/min). The fluoride breakthrough occurred late and the treated water volume was higher at a low pH and flow rate for both adsorbents. The Thomas and Adams-Bohart models were utilized and fitted well with the experimental kinetic data and the entire breakthrough curves for both adsorbents. Overall, the results revealed that the developed column is effective in handling water containing excess fluoride. Additional testing of the adsorbents including regeneration options is, however, required to confirm that the defluoridation of groundwater employing volcanic rocks is a safe and sustainable method.
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Safi SR, Gotoh T, Iizawa T, Nakai S. Development and regeneration of composite of cationic gel and iron hydroxide for adsorbing arsenic from ground water. CHEMOSPHERE 2019; 217:808-815. [PMID: 30458416 DOI: 10.1016/j.chemosphere.2018.11.050] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 11/01/2018] [Accepted: 11/07/2018] [Indexed: 06/09/2023]
Abstract
Globally, arsenic contaminated groundwater is a serious concern for human health. Previous studies have developed various methods to remove arsenic. But, most of them fail to selectively adsorb arsenic and regenerate. In this study, we developed an adsorbent, a cationic polymer gel loaded with iron hydroxide, which can adsorb arsenic from groundwater more effectively than the other adsorbents. The cationic polymer gel is N,N-dimethylamino propylacrylamide, methyl chloride quaternary (DMAPAAQ). The preparation of the gel is different from the other polymer gels used for adsorption of arsenic and other metals, and it ensures that the gel contains 53.7% FeOOH particles. It should also provide good selectivity, be simple to use and be cost-effective in terms of reusability. The study showed that the gel selectively adsorbed arsenic effectively at neutral pH levels. The results demonstrate that the maximum amount of As(V) adsorption was 123.4 mg/g, which is higher than the other adsorbents. In addition, the gel adsorbed As(V) selectively in the presence of Sulphate. Also, regeneration of the gel was performed for eight consecutive days with 87.6% effectiveness. Additionally, the adsorption mechanism of this gel composite and time required for reaching the equilibrium adsorption is discussed in this paper.
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Affiliation(s)
- Syed Ragib Safi
- Department of Chemical Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi, Hiroshima, Hiroshima, 739-8527, Japan
| | - Takehiko Gotoh
- Department of Chemical Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi, Hiroshima, Hiroshima, 739-8527, Japan.
| | - Takashi Iizawa
- Department of Chemical Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi, Hiroshima, Hiroshima, 739-8527, Japan
| | - Satoshi Nakai
- Department of Chemical Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi, Hiroshima, Hiroshima, 739-8527, Japan
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De Vylder A, Lauwaert J, De Clercq J, Van Der Voort P, Stevens CV, Thybaut JW. Kinetic evaluation of chitosan-derived catalysts for the aldol reaction in water. REACT CHEM ENG 2019. [DOI: 10.1039/c9re00245f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The reaction rate and stability of chitosan as heterogeneous amine catalyst is quantified in a batch and continuous-flow aldol reaction.
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Affiliation(s)
- Anton De Vylder
- Laboratory for Chemical Technology (LCT)
- Department of Materials, Textiles, and Chemical Engineering
- Ghent University
- 9052 Ghent
- Belgium
| | - Jeroen Lauwaert
- Industrial Catalysis and Adsorption Technology (INCAT)
- Department of Materials, Textiles, and Chemical Engineering
- Ghent University
- 9000 Ghent
- Belgium
| | - Jeriffa De Clercq
- Industrial Catalysis and Adsorption Technology (INCAT)
- Department of Materials, Textiles, and Chemical Engineering
- Ghent University
- 9000 Ghent
- Belgium
| | - Pascal Van Der Voort
- Center for Ordered Materials, Organometallics and Catalysis (COMOC)
- Department of Chemistry
- Ghent University
- 9000 Ghent
- Belgium
| | - Christian V. Stevens
- SynBioC Research Group
- Department of Green Chemistry and Technology
- Ghent University
- 9000 Ghent
- Belgium
| | - Joris W. Thybaut
- Laboratory for Chemical Technology (LCT)
- Department of Materials, Textiles, and Chemical Engineering
- Ghent University
- 9052 Ghent
- Belgium
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Agbovi HK, Wilson LD. Design of amphoteric chitosan flocculants for phosphate and turbidity removal in wastewater. Carbohydr Polym 2018; 189:360-370. [DOI: 10.1016/j.carbpol.2018.02.024] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 01/30/2018] [Accepted: 02/07/2018] [Indexed: 10/18/2022]
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