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Anjum A, Mazari SA, Hashmi Z, Jatoi AS, Abro R, Bhutto AW, Mubarak NM, Dehghani MH, Karri RR, Mahvi AH, Nasseri S. A review of novel green adsorbents as a sustainable alternative for the remediation of chromium (VI) from water environments. Heliyon 2023; 9:e15575. [PMID: 37153391 PMCID: PMC10160521 DOI: 10.1016/j.heliyon.2023.e15575] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 04/01/2023] [Accepted: 04/14/2023] [Indexed: 05/09/2023] Open
Abstract
The presence of heavy metal, chromium (VI), in water environments leads to various diseases in humans, such as cancer, lung tumors, and allergies. This review comparatively examines the use of several adsorbents, such as biosorbents, activated carbon, nanocomposites, and polyaniline (PANI), in terms of the operational parameters (initial chromium (VI) concentration (Co), temperature (T), pH, contact time (t), and adsorbent dosage) to achieve the Langmuir's maximum adsorption capacity (qm) for chromium (VI) adsorption. The study finds that the use of biosorbents (fruit bio-composite, fungus, leave, and oak bark char), activated carbons (HCl-treated dry fruit waste, polyethyleneimine (PEI) and potassium hydroxide (KOH) PEI-KOH alkali-treated rice waste-derived biochar, and KOH/hydrochloric acid (HCl) acid/base-treated commercial), iron-based nanocomposites, magnetic manganese-multiwalled carbon nanotubes nanocomposites, copper-based nanocomposites, graphene oxide functionalized amino acid, and PANI functionalized transition metal are effective in achieving high Langmuir's maximum adsorption capacity (qm) for chromium (VI) adsorption, and that operational parameters such as initial concentration, temperature, pH, contact time, and adsorbent dosage significantly affect the Langmuir's maximum adsorption capacity (qm). Magnetic graphene oxide functionalized amino acid showed the highest experimental and pseudo-second-order kinetic model equilibrium adsorption capacities. The iron oxide functionalized calcium carbonate (IO@CaCO3) nanocomposites showed the highest heterogeneous adsorption capacity. Additionally, Syzygium cumini bark biosorbent is highly effective in treating tannery industrial wastewater with high levels of chromium (VI).
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Affiliation(s)
- Amna Anjum
- Department of Chemical Engineering, Dawood University of Engineering and Technology, Karachi, 74800, Pakistan
| | - Shaukat Ali Mazari
- Department of Chemical Engineering, Dawood University of Engineering and Technology, Karachi, 74800, Pakistan
- Corresponding author.
| | - Zubair Hashmi
- Department of Chemical Engineering, Dawood University of Engineering and Technology, Karachi, 74800, Pakistan
| | - Abdul Sattar Jatoi
- Department of Chemical Engineering, Dawood University of Engineering and Technology, Karachi, 74800, Pakistan
| | - Rashid Abro
- Department of Chemical Engineering, Dawood University of Engineering and Technology, Karachi, 74800, Pakistan
| | - Abdul Waheed Bhutto
- Department of Chemical Engineering, Dawood University of Engineering and Technology, Karachi, 74800, Pakistan
| | - Nabisab Mujawar Mubarak
- Petroleum and Chemical Engineering, Faculty of Engineering, Universiti Teknologi Brunei, Bandar Seri Begawan, BE1410, Brunei Darussalam
- Corresponding author.
| | - Mohammad Hadi Dehghani
- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
- Center for Water Quality Research, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran
- Institute for Environmental Research, Center for Solid Waste Research, Tehran University of Medical Sciences, Tehran, Iran
- Corresponding author. Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
| | - Rama Rao Karri
- Petroleum and Chemical Engineering, Faculty of Engineering, Universiti Teknologi Brunei, Bandar Seri Begawan, BE1410, Brunei Darussalam
| | - Amir Hossein Mahvi
- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
- Institute for Environmental Research, Center for Solid Waste Research, Tehran University of Medical Sciences, Tehran, Iran
| | - Simin Nasseri
- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
- Center for Water Quality Research, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran
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Hezma AM, Shaltout WA, Kabary HA, El-Bahy GS, Abdelrazzak AB. Fabrication, Characterization and Adsorption Investigation of Nano Zinc Oxide–Sodium Alginate Beads for Effective Removal of Chromium (VI) from Aqueous Solution. J Inorg Organomet Polym Mater 2023. [DOI: 10.1007/s10904-023-02573-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2023]
Abstract
AbstractAlginate–zinc oxide (Alg–ZnO) biocomposite was synthesized and tested as a chromium ions Cr(VI) adsorbent for environmental applications. Alg–ZnO biocomposite was prepared by the interaction between sodium alginate biopolymer and zinc oxide nanoparticles (ZnO–NPs), prepared by modified wet chemical method. The solid adsorption characteristics of the synthesized Alg–ZnO biocomposite were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), transmission electron microscopy (TEM), and UV–Vis spectroscopy. Adsorption isotherms of chromium ions on the prepared Alg–ZnO biocomposite were investigated with varying the initial concentration of Cr(VI) under different application conditions such as pH, contact time, adsorbent dosage, and temperature. Adsorption of Cr(VI) was investigated by different isotherm models such as Langmuir, Freundlich, Temkin and Dubinin–Radushkevich models. Maximum adsorption capacities (31.09 and 34.63 mg/g) were achieved by ZnO–NPs and Alg–ZnO, respectively at 25 °C. The results of isotherm models indicate the perfect applicability of Langmuir and Dubinin–Radushkevich models, revealing the dominance of monolayer and the physisorption of chromium ions onto the studied adsorbents.
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Beheshti A, Hashemi F, Setayeshizadeh S, Mousavifard ES, Solymani-babadi S, Mayer P. High capacity for selective adsorption of anionic pollutants by a silver(I) 3D cationic supramolecular constructed from a flexible dithione ligand. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Sinha R, Kumar R, Sharma P, Kant N, Shang J, Aminabhavi TM. Removal of hexavalent chromium via biochar-based adsorbents: State-of-the-art, challenges, and future perspectives. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 317:115356. [PMID: 35623129 DOI: 10.1016/j.jenvman.2022.115356] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 05/01/2022] [Accepted: 05/17/2022] [Indexed: 06/15/2023]
Abstract
Chromium originates from geogenic and extensive anthropogenic activities and significantly impacts natural ecosystems and human health. Various methods have been applied to remove hexavalent chromium (Cr(VI)) from aquatic environmental matrices, including adsorption via different adsorbents, which is considered to be the most common and low-cost approach. Biochar materials have been recognized as renewable carbon sorbents, pyrolyzed from various biomass at different temperatures under limited/no oxygen conditions for heavy metals remediation. This review summarizes the sources, chemical speciation & toxicity of Cr(VI) ions, and raw and modified biochar applications for Cr(VI) remediation from various contaminated matrices. Mechanistic understanding of Cr(VI) adsorption using different biochar-based materials through batch and saturated column adsorption experiments is documented. Electrostatic interaction and ion exchange dominate the Cr(VI) adsorption onto the biochar materials in acidic pH media. Cr(VI) ions tend to break down as HCrO4-, CrO42-, and Cr2O72- ions in aqueous solutions. At low pH (∼1-4), the availability of HCrO4- ions attributes the electrostatic forces of attraction due to the available functional groups such as -NH4+, -COOH, and -OH2+, which encourages higher adsorption of Cr(VI). Equilibrium isotherm, kinetic, and thermodynamic models help to understand Cr(VI)-biochar interactions and their adsorption mechanism. The adsorption studies of Cr(VI) are summarized through the fixed-bed saturated column experiments and Cr-contaminated real groundwater analysis using biochar-based sorbents for practical applicability. This review highlights the significant challenges in biochar-based material applications as green, renewable, and cost-effective adsorbents for the remediation of Cr(VI). Further recommendations and future scope for the implications of advanced novel biochar materials for Cr(VI) removal and other heavy metals are elegantly discussed.
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Affiliation(s)
- Rama Sinha
- School of Ecology and Environment Studies, Nalanda University, Rajgir, Bihar, 803 116, India
| | - Rakesh Kumar
- School of Ecology and Environment Studies, Nalanda University, Rajgir, Bihar, 803 116, India
| | - Prabhakar Sharma
- School of Ecology and Environment Studies, Nalanda University, Rajgir, Bihar, 803 116, India.
| | - Nishi Kant
- Department of Environmental Science and Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, 826 004, Jharkhand, India
| | - Jianying Shang
- Department of Soil and Water Science, China Agricultural University, Beijing, 100083, China
| | - Tejraj M Aminabhavi
- School of Advanced Sciences, KLE Technological University, Hubballi, 580 031, India; School of Engineering, University of Petroleum and Energy Studies, Bidholi, Dehradun, Uttarakhand, 248 007, India; Department of Chemistry, Karnatak University, Dharwad, 580 003, India.
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Narayanasamy S, Sundaram V, Sundaram T, Vo DVN. Biosorptive ascendency of plant based biosorbents in removing hexavalent chromium from aqueous solutions - Insights into isotherm and kinetic studies. ENVIRONMENTAL RESEARCH 2022; 210:112902. [PMID: 35167851 DOI: 10.1016/j.envres.2022.112902] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 01/22/2022] [Accepted: 02/04/2022] [Indexed: 06/14/2023]
Abstract
Chromium is a toxic heavy metal prevalent in higher levels in aqueous matrices owing to industrial applications. Whilst being a key player in industries, the environmental issues caused by Cr(VI) are highly deleterious. Adsorptive remediation is found to be an effective method adopted by researchers in the past decades for Cr(VI) removal from water streams in which variety of naturally available biosorbents have been explored for handling Cr(VI). This review article briefly sketches up the biosorptive potential of plant-based biosorbents used in raw and chemically modified form for the optimum exclusion of Cr(VI) from aqueous sources. Mechanisms and kinetic behavior of the removal process are also discussed. pH of the solution and initial Cr(VI) concentration were found to be the key parameters in Cr removal. The mechanism of Cr removal from aqueous systems was elucidated to be either adsorption or adsorption-coupled-reduction. After precise discussion on various plant-based biosorbents with their maximum adsorption capacities, desorption and regeneration potential, it is perceived that plant-based biosorbents are superior options for Cr(VI) elimination from aqueous streams.
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Affiliation(s)
- Saranya Narayanasamy
- Department of Biotechnology, Saveetha School of Engineering, SIMATS, Chennai, Tamil Nadu, India
| | - Vickram Sundaram
- Department of Biotechnology, Saveetha School of Engineering, SIMATS, Chennai, Tamil Nadu, India
| | - Thanigaivel Sundaram
- Department of Biotechnology, Saveetha School of Engineering, SIMATS, Chennai, Tamil Nadu, India.
| | - Dai-Viet N Vo
- Institute of Environmental Technology and Sustainable Development, Nguyen Tat Thanh University, Ho Chi Minh City, 755414, Viet Nam.
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Zaib Q, Kyung D. Optimized removal of hexavalent chromium from water using spent tea leaves treated with ascorbic acid. Sci Rep 2022; 12:8845. [PMID: 35614301 PMCID: PMC9132990 DOI: 10.1038/s41598-022-12787-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 05/09/2022] [Indexed: 11/29/2022] Open
Abstract
Spent tea leaves were functionalized with ascorbic acid to obtain treated tea waste (t-TW) to encourage the adsorption of hexavalent chromium from water. The adsorption removal of Cr(VI) was systematically investigated as a function of four experimental factors: pH (2–12), initial Cr(VI) concentration (1–100 mg L−1), t-TW dosage (0–4 g L−1), and temperature (10–50 °C) by following a statistical experimental design. A central composite rotatable experimental design based on a response surface methodology was used to establish an empirical model that assessed the individual and combined effects of factors on adsorptive removal of Cr(VI). The model was experimentally verified and statistically validated then used to predict optimal adsorption removal of Cr(VI) from water. At optimized conditions, ≥ 99% of 1 mg L−1 Cr(VI) can be removed by 4 g L−1 t-TW at a pH of 9. The adsorptive mechanism was assessed by conducting kinetics and equilibrium studies. The adsorption of Cr(VI) by t-TW followed a pseudo-second-order kinetics model (k2 = 0.001 g mg−1 h−1) and could be described by Langmuir and Temkin isotherms, indicating monolayer adsorption and predominantly adsorbate-adsorbent interactions. The t-TW exhibited a competitive Cr(VI) adsorption capacity of 232.2 mg g−1 compared with the other low-cost adsorbents. These results support the utilization of tea waste for the removal of hazardous metal contaminants from aqueous systems.
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Affiliation(s)
- Qammer Zaib
- School of Civil and Environmental Engineering, University of Ulsan, Daehak-ro 93, Nam-gu, Ulsan, 44610, Republic of Korea
| | - Daeseung Kyung
- School of Civil and Environmental Engineering, University of Ulsan, Daehak-ro 93, Nam-gu, Ulsan, 44610, Republic of Korea.
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Sivaraman S, Michael Anbuselvan N, Venkatachalam P, Ramiah Shanmugam S, Selvasembian R. Waste tire particles as efficient materials towards hexavalent chromium removal: Characterisation, adsorption behaviour, equilibrium, and kinetic modelling. CHEMOSPHERE 2022; 295:133797. [PMID: 35122814 DOI: 10.1016/j.chemosphere.2022.133797] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 01/08/2022] [Accepted: 01/27/2022] [Indexed: 06/14/2023]
Abstract
The growing demand for vehicles is increasing every year, and this paves the way for the environmental problem for the generation of the waste tire (WT) and associated disposal after their end life. On the other direction, effluent from tannery and electroplating industries contented with a higher concentration of chromium, which is a toxic pollutant, induces mutation effects. In this work, the approach of reutilization of waste tires as adsorbent is reported towards the sequestrations of hexavalent chromium (Cr(VI)) from the simulated system. The waste tire sample is activated using orthophosphoric acid (H3PO4) and utilized for adsorption studies. Adsorption studies are performed with native tire sample (NTP) and activated tire sample (ATP). About 96.5% of Cr(VI) adsorption efficiency was attained using ATP and at the optimal adsorption solution pH 2.0. The adsorbent performed relatively well in wide a range of initial solution pH tested in the present research. The experimental data analysis of Cr(VI) adsorption onto NTP and ATP revealed the best fit with the kinetic model of pseudo-second-order. Further, the equilibrium data were analysed using two-parameter isotherms, relatively the Langmuir isotherm best represented in both NTP and ATP. ATP demonstrated with higher Cr(VI) removal performance with an adsorption capacity of 102.90 mg/g, according to the Langmuir model. The proposed idea of utilizing waste tire particles as adsorbents in the treatment of Cr(VI) contaminated water offers valuable guidance towards further investigations in the directions of dynamic adsorption and effluent treatment.
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Affiliation(s)
- Subramaniyasharma Sivaraman
- Center for Bioenergy, School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur, 613401, India
| | - Nithin Michael Anbuselvan
- Department of Chemical Engineering, School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur, 613401, India
| | - Ponnusami Venkatachalam
- Center for Bioenergy, School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur, 613401, India; Department of Chemical Engineering, School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur, 613401, India
| | - Saravanan Ramiah Shanmugam
- Center for Bioenergy, School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur, 613401, India.
| | - Rangabhashiyam Selvasembian
- Center for Bioenergy, School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur, 613401, India; Department of Chemical Engineering, School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur, 613401, India.
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Pant BD, Neupane D, Paudel DR, Chandra Lohani P, Gautam SK, Pokhrel MR, Poudel BR. Efficient biosorption of hexavalent chromium from water by modified arecanut leaf sheath. Heliyon 2022; 8:e09283. [PMID: 35497041 PMCID: PMC9048133 DOI: 10.1016/j.heliyon.2022.e09283] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Revised: 03/06/2022] [Accepted: 04/12/2022] [Indexed: 11/19/2022] Open
Abstract
In this work, the excision of hexavalent chromium (Cr(VI)) was studied from an aqueous solution using the chemically modified arecanut leaf sheath (CALS) as a novel bio-adsorbent. The as-prepared adsorbent was characterized by using instrumental methods including Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS). The effect of several factors, including solution pH, contact time, and sorbent dosages were examined to identify the optimum condition for the sorption ability. The optimal pH of Cr(VI) biosorption was 2.0, and equilibrium was reached in 150 min. Adsorption was shown to be pseudo-second-order in kinetic investigations, and the Langmuir isotherm with maximal adsorption efficiency was determined as 109.89 mg/g. The spent biosorbent can be easily regenerated and reused. For the biosorption of oxyanions of chromium, both electrostatic attraction and ligand exchange mechanism play critical roles. From the results, the CALS appears to be a potential low-cost effective sorbent to remove Cr (VI) from water.
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Affiliation(s)
- Bishnu Datt Pant
- Department of Chemistry, Tri-Chandra Multiple Campus, Tribhuvan University, Kathmandu 44600, Nepal
| | - Deepa Neupane
- Department of Chemistry, Tri-Chandra Multiple Campus, Tribhuvan University, Kathmandu 44600, Nepal
| | - Dasu Ram Paudel
- Department of Chemistry, Tri-Chandra Multiple Campus, Tribhuvan University, Kathmandu 44600, Nepal
| | | | - Surendra Kumar Gautam
- Department of Chemistry, Tri-Chandra Multiple Campus, Tribhuvan University, Kathmandu 44600, Nepal
| | - Megh Raj Pokhrel
- Central Department of Chemistry, Tribhuvan University, Kathmandu 44618, Nepal
| | - Bhoj Raj Poudel
- Department of Chemistry, Tri-Chandra Multiple Campus, Tribhuvan University, Kathmandu 44600, Nepal
- Central Department of Chemistry, Tribhuvan University, Kathmandu 44618, Nepal
- Corresponding author.
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Malik V, Saya L, Gautam D, Sachdeva S, Dheer N, Arya DK, Gambhir G, Hooda S. Review on adsorptive removal of metal ions and dyes from wastewater using tamarind-based bio-composites. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-021-03991-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Ansari S, Ahmed N, Mahar RB, Khatri Z, Khatri M. Fabrication and characterization of electrospun zein/nylon-6 (ZN6) nanofiber membrane for hexavalent chromium removal. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:653-662. [PMID: 34338982 DOI: 10.1007/s11356-021-15729-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 07/26/2021] [Indexed: 06/13/2023]
Abstract
Zein has drawn attention for its great potential for biodegradability and adsorption of hexavalent chromium Cr(VI) that is a carcinogenic industrial pollutant. Zein is a biopolymer extracted from corn and is used for many purposes, but because of its poor stability in aqueous solution, a novel composite of zein and nylon-6 was used to synthesize a nanofibrous membrane using electrospinning to improve its stability and tensile strength. The scanning electron microscope (SEM) image of the zein/nylon-6 (ZN6) nanofiber membrane showed a smooth, beadless, and continuous structure of the nanofibers, but the Fourier transform infrared (FTIR) spectrum of pristine and Cr(VI) saturated ZN6 showed that peaks of secondary amide, carbonyl, and hydroxyl functional groups were involved in adsorption. Optimized experimental parameters were obtained with pH 2.0, contact time 60 min, adsorbent dosage 25 mg, and adsorbate concentration 5.0 mg Cr-VI/mL. Experimental results show that the ZN6 nanofibers removed 87% Cr(VI) with an adsorption capacity of 4.73 mg/g at ambient temperature. Also, the Langmuir isotherm fits well, and the adsorption process followed a pseudo-2nd-order kinetics with r2 of 0.90 and 0.99 respectively.
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Affiliation(s)
- Sorth Ansari
- US Pakistan Center for Advanced Studies in Water, Mehran University of Engineering and Technology, Jamshoro, Sindh, 76062, Pakistan
| | - Naveed Ahmed
- US Pakistan Center for Advanced Studies in Water, Mehran University of Engineering and Technology, Jamshoro, Sindh, 76062, Pakistan.
| | - Rasool Bux Mahar
- US Pakistan Center for Advanced Studies in Water, Mehran University of Engineering and Technology, Jamshoro, Sindh, 76062, Pakistan
| | - Zeeshan Khatri
- Department of Textile Engineering, Mehran University of Engineering and Technology, Jamshoro, Sindh, Pakistan
| | - Muzamil Khatri
- Nano Fusion Technology Research Group, Division of Frontier Fibers, Institute for Fiber Engineering (IFES), Interdisciplinary Cluster for Cutting Edge Research (ICCER), Shinshu University, Tokida 3-15-1, Ueda, Nagano Prefecture, 386-8567, Japan
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High-efficiency sandwich-like hierarchical AgBr-Ag@MIL-68(Fe) photocatalysts: Step-scheme photocatalytic mechanism for enhanced photoactivity. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119442] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Alzahrani FM, Alsaiari NS, Katubi KM, Amari A, Ben Rebah F, Tahoon MA. Synthesis of Polymer-Based Magnetic Nanocomposite for Multi-Pollutants Removal from Water. Polymers (Basel) 2021; 13:1742. [PMID: 34073555 PMCID: PMC8199017 DOI: 10.3390/polym13111742] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 05/22/2021] [Accepted: 05/25/2021] [Indexed: 01/16/2023] Open
Abstract
A magnetic polymer-based nanocomposite was fabricated by the modification of an Fe3O4/SiO2 magnetic composite with polypyrrole (PPy) via co-precipitation polymerization to form PPy/Fe3O4/SiO2 for the removal of Congo red dye (CR) and hexavalent chromium Cr(VI) ions from water. The nanocomposite was characterized using various techniques including X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), vibration sample magnetometer, and thermogravimetric analysis (TGA). The results confirm the successful fabrication of the nanocomposite in the size of nanometers. The effect of different conditions such as the contact time, adsorbent dosage, solution pH, and initial concentration on the adsorption process was investigated. The adsorption isotherm suggested monolayer adsorption of both contaminants over the PPy/Fe3O4/SiO2 nanocomposite following a Langmuir isotherm, with maximum adsorption of 361 and 298 mg.g-1 for CR dye and Cr(VI), respectively. Furthermore, the effect of water type on the adsorption process was examined, indicating the applicability of the PPy/Fe3O4/SiO2 nanocomposite for real sample treatment. Interestingly, the reusability of the nanocomposite for the removal of the studied contaminants was investigated with good results even after six successive cycles. All results make this nanocomposite a promising material for water treatment.
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Affiliation(s)
- Fatimah Mohammed Alzahrani
- Chemistry Department, College of Science, Princess Nourah bint Abdulrahman University, Riyadh 11671, Saudi Arabia;
| | - Norah Salem Alsaiari
- Chemistry Department, College of Science, Princess Nourah bint Abdulrahman University, Riyadh 11671, Saudi Arabia;
| | | | - Abdelfattah Amari
- Department of Chemical Engineering, College of Engineering, King Khalid University, Abha 61411, Saudi Arabia
- Research Laboratory, Department of Chemical Engineering, Energy and Environment, National School of Engineers, Gabes University, Gabes 6072, Tunisia
| | - Faouzi Ben Rebah
- Department of Chemistry, College of Science, King Khalid University, Abha 61413, Saudi Arabia;
- Higher Institute of Biotechnology of Sfax (ISBS), Sfax University, Sfax 3000, Tunisia
| | - Mohamed A. Tahoon
- Department of Chemistry, College of Science, King Khalid University, Abha 61413, Saudi Arabia;
- Chemistry Department, Faculty of Science, Mansoura University, Mansoura 35516, Egypt
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Khaksar Najafi E, Jamshidi Chenari R, Payan M, Arabani M. Compositional effects of clay-fly ash geopolymers on the sorption process of lead and zinc. JOURNAL OF ENVIRONMENTAL QUALITY 2021; 50:768-781. [PMID: 33576032 DOI: 10.1002/jeq2.20207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Accepted: 02/01/2021] [Indexed: 06/12/2023]
Abstract
Because long-term leachate penetration through a hydraulic barrier is unavoidable, active-passive liners are widely used to mitigate the migration of potential contaminants. Geopolymerization represents a viable method for metals removal, which simultaneously improves the properties of local clay to compensate for the lack of suitable soil in the design of active-passive liners. This study investigated how clay-fly ash geopolymers enhance the sorption of divalent lead [Pb(II)] and divalent zinc [Zn(II)] from leachate compared with an untreated clay. Two clay-fly ash geopolymers were synthesized from the mixtures containing 50 and 60% fly ash to the total solid mass and then activated by 10 M NaOH solutions. The influence of Na/fly ash ratios and activator content was also examined. The results indicate that a fly ash-based geopolymer could be a simple solution to increase the sorption capacity of local clay. A lower ratio of Na/fly ash and activator content, resulting in a higher porosity, led to a better performance for metal removal. According to the results of sorption isotherms and batch experiments, Pb(II) and Zn(II) exhibit different sorption behaviors affected by the compositions of synthesized clay-fly ash geopolymers, which could be adjusted to reach a proper sorption capacity. The results of the kinetic study also show that the heterogeneous matrix of the clay-fly ash geopolymers with different porosities led to mutual cooperation between reaction and diffusion-controlled steps for metal removal.
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Affiliation(s)
| | | | - Meghdad Payan
- Dep. of Civil Engineering, Univ. of Guilan, Rasht, Iran
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Asimakopoulos G, Baikousi M, Salmas C, Bourlinos AB, Zboril R, Karakassides MA. Advanced Cr(VI) sorption properties of activated carbon produced via pyrolysis of the "Posidonia oceanica" seagrass. JOURNAL OF HAZARDOUS MATERIALS 2021; 405:124274. [PMID: 33131936 DOI: 10.1016/j.jhazmat.2020.124274] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 09/30/2020] [Accepted: 10/11/2020] [Indexed: 06/11/2023]
Abstract
This research deals with the removal of Cr(VI), one of the most toxic heavy metal in biological systems, from wastewater by using activated carbon produced via pyrolysis and chemical activation of "Posidonia oceanica". That is the most important and well-studied seagrass species of the Mediterranean Sea. The as produced activated carbon exhibited high specific surface area up to 1563 m2/g and a cumulative pore volume of 0.74 cm3/g, allocated to 74% micro-pores and 26% to meso-macro- pores. The adsorption capacity of Cr(VI) into Posidonia oceanica activated carbon was studied via batch experiments considering the contact time, the initial concentration and the pH parameters. The results were interpreted using four different adsorption kinetic models. The activated carbon material seems to exhibit excellent sorption properties with rapid removal capability for Cr(VI). The estimated maximum uptake capacity at equilibrium stage was ~120 mg/g. Also, the initial adsorption rate ri was dependent on the initial Cr(VI) concentration in aqueous solution and it was from 77 mg/(g*h) to 264 mg/(g*h). The best fitted kinetic model seems to be the Diffusion-Chemisorption model with the rate constant KDC of the Cr(VI) ions transfer from liquid to solid particles extend from 52 to 78 mg/(g*h0.5).
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Affiliation(s)
- Georgios Asimakopoulos
- Department of Materials Science and Engineering, University of Ioannina, GR-45110 Ioannina, Greece
| | - Maria Baikousi
- Department of Materials Science and Engineering, University of Ioannina, GR-45110 Ioannina, Greece.
| | - Constantinos Salmas
- Department of Materials Science and Engineering, University of Ioannina, GR-45110 Ioannina, Greece
| | | | - Radek Zboril
- Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacky University in Olomouc, 77146, Czech Republic; Nanotechnology Centre, VŠB-Technical University of Ostrava, 17. listopadu 2172/15, 708 00 Ostrava-Poruba, Czech Republic
| | - Michael A Karakassides
- Department of Materials Science and Engineering, University of Ioannina, GR-45110 Ioannina, Greece; Institute of Materials Science and Computing, University Research Center of Ioannina (URCI), 45110 Ioannina, Greece
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15
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Cao J, He G, Ning X, Wang C, Fan L, Yin Y, Cai W. Hydroxypropyl chitosan-based dual self-healing hydrogel for adsorption of chromium ions. Int J Biol Macromol 2021; 174:89-100. [PMID: 33476625 DOI: 10.1016/j.ijbiomac.2021.01.089] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Revised: 12/31/2020] [Accepted: 01/14/2021] [Indexed: 12/13/2022]
Abstract
A facile, environmentally benign approach had been developed for the preparation of dual self-healing and adsorption hydrogel through hydroxypropyl chitosan (HPCS), polyacrylamide (PAM) and polyvinyl alcohol (PVA). The self-healing capability of the hydrogels without any external stimulus was ascribed to dynamic Schiff-base bonds, borate bonds and hydrogen bonds, while the adsorption capacity of hydrogels came from the protonated amino group effect at a specific pH. It was demonstrated that the HPP DN hydrogel had a maximum equilibrium swelling ratio of 643% and a maximum compressive strength of 267 kPa. The weight loss of HPP DN hydrogel was 14.26% lower than that of HPCS/PAM single network hydrogel, furthermore, HPP DN hydrogel could achieve self-healing within 10 h. Due to the large number of active groups, the adsorption capacity of Cr6+ reached 95.31 mg/g. It could adsorb in a wide pH range of 1 to 6, and could describe by pseudo-first-order kinetic model and Langmuir adsorption isotherm model, which would provide a new idea for the adsorption and removal of heavy metal ions. In short, the prepared HPP hydrogel had dual self-healing ability, adsorption capacity and mechanical strength, which would make it a promising candidate for long-life adsorbent.
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Affiliation(s)
- Jilong Cao
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, China
| | - Guanghua He
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, China.
| | - Xiaoqing Ning
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, China
| | - Cheng Wang
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, China
| | - Lihong Fan
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, China.
| | - Yihua Yin
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, China
| | - Weiquan Cai
- School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China; School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450002, China
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16
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Nanoporous Activated Carbon Derived via Pyrolysis Process of Spent Coffee: Structural Characterization. Investigation of Its Use for Hexavalent Chromium Removal. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10248812] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Hexavalent chromium (Cr(VI)) is a heavy metal that is highly soluble and exhibits toxic effects on biological systems. Nevertheless, it is used in many industrial applications. The adsorption process of Cr(VI), using activated carbon (AC), is under investigation globally. On the other hand, around six million tons of spent coffee is sent to landfill annually. In the spirit of cyclic economy, this research investigated the production of AC from spent coffee for the removal of Cr(VI) from wastewater. The AC was produced via pyrolysis process under a nitrogen atmosphere. Chemical activation using potassium hydroxide (KOH) occurred simultaneously with the pyrolysis process. The produced AC was tested as an absorber of Cr(VI). The best fitted kinetic model was the diffusion–chemisorption model. A 24-h adsorption experiment was carried out using a solution with a pH of 3 and an initial Cr(VI) concentration of 54.14 ppm. This resulted in an experimental maximum capacity of 109 mg/g, while the theoretical prediction was 137 mg/g. It also resulted in an initial adsorption rate (ri) of 110 (mg/(g h)). The Brunauer–Emmett–Teller surface area (SgBET) was 1372 m2/g, the Langmuir surface area (SgLang.) was 1875 m2/g, and the corrugated pore structure model surface area (SgCPSM) was 1869 m2/g. The micropore volume was 84.6%, exhibiting micropores at Dmicro1 = 1.28 and Dmicro2 = 1.6 nm. The tortuosity factor (τ) was 4.65.
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17
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Verma R, Sarkar S. Trace Cr(VI) Removal: Evidence of Redox-Active Ion Exchange by a Weak-Base Anion Exchanger. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c04347] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Renuka Verma
- Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India
| | - Sudipta Sarkar
- Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India
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18
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Chakraborty R, Asthana A, Singh AK, Verma R, Sankarasubramanian S, Yadav S, Carabineiro SAC, Susan MABH. Chicken feathers derived materials for the removal of chromium from aqueous solutions: kinetics, isotherms, thermodynamics and regeneration studies. J DISPER SCI TECHNOL 2020. [DOI: 10.1080/01932691.2020.1842760] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Rupa Chakraborty
- Department of Chemistry, Govt. V. Y. T. PG. Autonomous College, Durg, Chhattisgarh, India
| | - Anupama Asthana
- Department of Chemistry, Govt. V. Y. T. PG. Autonomous College, Durg, Chhattisgarh, India
| | - Ajaya Kumar Singh
- Department of Chemistry, Govt. V. Y. T. PG. Autonomous College, Durg, Chhattisgarh, India
| | - Renu Verma
- Department of Chemistry, Govt. V. Y. T. PG. Autonomous College, Durg, Chhattisgarh, India
| | - Sreevidya Sankarasubramanian
- Department of Chemistry, Govt. V. Y. T. PG. Autonomous College, Durg, Chhattisgarh, India
- Department of Chemistry, Kalyan PG College, Bhilai Nagar, Durg, Chhattisgarh, India
| | - Sushma Yadav
- Department of Chemistry, Govt. V. Y. T. PG. Autonomous College, Durg, Chhattisgarh, India
| | - Sónia A. C. Carabineiro
- LAQV-REQUIMTE, Department of Chemistry, NOVA School of Science and Technology, Universidade NOVA de Lisboa, Caparica, Portugal
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Abonyi MN, Aniagor CO, Menkiti MC. Effective Dephenolation of Effluent from Petroleum Industry Using Ionic-Liquid-Induced Hybrid Adsorbent. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2019. [DOI: 10.1007/s13369-019-04000-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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20
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Arslanoğlu H, Kaya S, Tümen F. Cr(VI) adsorption on low-cost activated carbon developed from grape marc-vinasse mixture. PARTICULATE SCIENCE AND TECHNOLOGY 2019. [DOI: 10.1080/02726351.2019.1632399] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Hasan Arslanoğlu
- Department of Chemical Engineering, Firat University, Elazig, Turkey
| | - Semih Kaya
- Department of Chemical Engineering, Firat University, Elazig, Turkey
| | - Fikret Tümen
- Department of Chemical Engineering, Firat University, Elazig, Turkey
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21
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Abstract
In this study, Grewia spp. biopolymer was utilized as a biosorbent for elimination of hexavalent chromium from water. Fourier-transform infrared spectrometry (FTIR) and X-ray diffraction (XRD) were performed for characterization of the biosorbent. Experiments were conducted in a batch mode at room temperature (25 ± 2°C) and agitation speed of 100 rpm to determine the influence of biosorbent dose, contact time, Cr(VI) concentration, and initial solution pH. It was found that equilibrium was attained in 50 min. A pseudo-first-order model suited well than a pseudo-second-order model. Biosorption capacity of Grewia spp. biopolymer increased with increase in concentration and depended on the solution pH. Langmuir and Freundlich models described experimental data very well. These findings showed that Grewia spp. biopolymer can serve as a biosorbent for elimination of Cr(VI) from water.
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Cherdchoo W, Nithettham S, Charoenpanich J. Removal of Cr(VI) from synthetic wastewater by adsorption onto coffee ground and mixed waste tea. CHEMOSPHERE 2019; 221:758-767. [PMID: 30684773 DOI: 10.1016/j.chemosphere.2019.01.100] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 01/12/2019] [Accepted: 01/16/2019] [Indexed: 05/14/2023]
Abstract
We attempted to recycle mixed waste tea and coffee ground as alternative low-cost adsorbents for Cr(VI) removal. The adsorption parameters optimized were: initial Cr(VI) concentration (10-30 mg L-1), contact time (180 min), adsorbent dose (2.0 g L-1), initial pH (2.0), temperature (30-50 °C), and agitation speed (250 rpm). Freundlich isotherm was found better fitted with a high correlation coefficient (R2 = 0.97 for mixed waste tea and 0.92 for coffee ground) than to Langmuir model (R2 = 0.89 for mixed waste tea and 0.86 for coffee ground) for the 10-250 mg L-1 concentration range. Analysis of kinetic studies indicated that Cr(VI) adsorption by both adsorbents was consistent with the pseudo-second-order kinetic model with a good R2 and Marquardt's present standard deviation (MPSD) values. Experimental data demonstrated a sorption capacity of 94.34 mg g-1 of mixed waste tea and 87.72 mg g-1 of coffee ground. Scanning electron microscopy (SEM), Transmission electron microscopy (TEM) and Energy dispersive X-ray spectroscopy (EDS) revealed the noticeable chromium accumulation on the adsorbent surfaces after adsorption. Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) studies showed that carbon and oxygen functional groups on the surface of both adsorbents involved in Cr(VI) adsorption. The adsorbents could be reused four times. Large-scale operation using 100 L of packed-bed reactor showed the breakthrough time of adsorption for mixed waste tea of 30 min in 100 mg L-1 Cr(VI) concentration. These results suggested that mixed waste tea and coffee ground be considered as alternative adsorbent for Cr(VI) removal.
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Affiliation(s)
- Wachiraphorn Cherdchoo
- Bioengineering Program, Faculty of Engineering, Burapha University, Bangsaen, Chon Buri 20131, Thailand
| | - Srisuda Nithettham
- Bioengineering Program, Faculty of Engineering, Burapha University, Bangsaen, Chon Buri 20131, Thailand; Department of Chemical Engineering, Faculty of Engineering, Burapha University, Bangsaen, Chon Buri 20131, Thailand
| | - Jittima Charoenpanich
- Bioengineering Program, Faculty of Engineering, Burapha University, Bangsaen, Chon Buri 20131, Thailand; Department of Biochemistry, Faculty of Science, Burapha University, Bangsaen, Chon Buri 20131, Thailand.
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23
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de la Luz-Asunción M, Pérez-Ramírez EE, Martínez-Hernández AL, Castano VM, Sánchez-Mendieta V, Velasco-Santos C. Non-linear modeling of kinetic and equilibrium data for the adsorption of hexavalent chromium by carbon nanomaterials: Dimension and functionalization. Chin J Chem Eng 2019. [DOI: 10.1016/j.cjche.2018.08.024] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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24
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Wang Z, Huang W, Bin P, Zhang X, Yang G. Preparation of quaternary amine-grafted organosolv lignin biosorbent and its application in the treatment of hexavalent chromium polluted water. Int J Biol Macromol 2019; 126:1014-1022. [DOI: 10.1016/j.ijbiomac.2018.12.087] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 12/02/2018] [Accepted: 12/09/2018] [Indexed: 11/24/2022]
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25
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Pathak U, Roy A, Mandal DD, Das P, Kumar T, Mandal T. Bioattenuation of phenol and cyanide involving immobilised spent tea activated carbon with
Alcaligenes faecalis
JF339228
: Critical assessment of the degraded intermediates. ASIA-PAC J CHEM ENG 2018. [DOI: 10.1002/apj.2278] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Ananya Roy
- Department of Chemical EngineeringNIT Durgapur India
| | | | - Papita Das
- Department of Chemical EngineeringJadavpur University Kolkata India
| | | | - Tamal Mandal
- Department of Chemical EngineeringNIT Durgapur India
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26
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Awang NA, Wan Salleh WN, Ismail AF, Yusof N, Aziz F, Jaafar J. Adsorption Behavior of Chromium(VI) onto Regenerated Cellulose Membrane. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b02366] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- N. A. Awang
- Advanced Membrane Technology Research Centre (AMTEC), Universiti Teknologi Malaysia, 81310 Skudai, Johor Darul Ta’zim, Malaysia
- School of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor Darul Ta’zim, Malaysia
| | - W. N. Wan Salleh
- Advanced Membrane Technology Research Centre (AMTEC), Universiti Teknologi Malaysia, 81310 Skudai, Johor Darul Ta’zim, Malaysia
- School of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor Darul Ta’zim, Malaysia
| | - A. F. Ismail
- Advanced Membrane Technology Research Centre (AMTEC), Universiti Teknologi Malaysia, 81310 Skudai, Johor Darul Ta’zim, Malaysia
- School of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor Darul Ta’zim, Malaysia
| | - N. Yusof
- Advanced Membrane Technology Research Centre (AMTEC), Universiti Teknologi Malaysia, 81310 Skudai, Johor Darul Ta’zim, Malaysia
- School of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor Darul Ta’zim, Malaysia
| | - F. Aziz
- Advanced Membrane Technology Research Centre (AMTEC), Universiti Teknologi Malaysia, 81310 Skudai, Johor Darul Ta’zim, Malaysia
- School of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor Darul Ta’zim, Malaysia
| | - J. Jaafar
- Advanced Membrane Technology Research Centre (AMTEC), Universiti Teknologi Malaysia, 81310 Skudai, Johor Darul Ta’zim, Malaysia
- School of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor Darul Ta’zim, Malaysia
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27
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Davarnejad R, Karimi Dastnayi Z, Kennedy J. Cr(VI) adsorption on the blends of Henna with chitosan microparticles: Experimental and statistical analysis. Int J Biol Macromol 2018; 116:281-288. [DOI: 10.1016/j.ijbiomac.2018.04.189] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 04/04/2018] [Accepted: 04/30/2018] [Indexed: 11/29/2022]
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28
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Manirethan V, Raval K, Rajan R, Thaira H, Balakrishnan RM. Data on the removal of heavy metals from aqueous solution by adsorption using melanin nanopigment obtained from marine source: Pseudomonas stutzeri. Data Brief 2018; 20:178-189. [PMID: 30112433 PMCID: PMC6092452 DOI: 10.1016/j.dib.2018.07.065] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 07/04/2018] [Accepted: 07/25/2018] [Indexed: 10/28/2022] Open
Abstract
Heavy metals are one of deadly contaminants in ground water across the globe. Thus, herein, this data set comprises experimental and modelled data on the removal of heavy metals from ground water using melanin synthesized by the marine bacteria Pseudomonas stutzeri. Characterization of biosynthesized melanin and modelling of the kinetic and the thermodynamic study on adsorption of heavy metals such as mercury (Hg(II)), lead (Pb(II)), chromium (Cr(VI)), and copper (Cu(II)) are included in this article. Apart from the study of parameters involved in adsorption such as pH, temperature, concentration and time; the data from these studies are modelled to analyze the nature and characteristic of heavy metals adsorbing to melanin nanoparticles. The figures from models, results from models as tables, characterization and analytical figures are depicted in this work.
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Affiliation(s)
- Vishnu Manirethan
- Department of Chemical Engineering, National Institute of Technology Karnataka, Mangalore 575025, India
| | - Keyur Raval
- Department of Chemical Engineering, National Institute of Technology Karnataka, Mangalore 575025, India
| | - Reju Rajan
- Department of Chemical Engineering, National Institute of Technology Karnataka, Mangalore 575025, India
| | - Harsha Thaira
- Department of Chemical Engineering, National Institute of Technology Karnataka, Mangalore 575025, India
| | - Raj Mohan Balakrishnan
- Department of Chemical Engineering, National Institute of Technology Karnataka, Mangalore 575025, India
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29
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Potential use of green algae as a biosorbent for hexavalent chromium removal from aqueous solutions. Saudi J Biol Sci 2018; 25:1733-1738. [PMID: 30591793 PMCID: PMC6303174 DOI: 10.1016/j.sjbs.2018.07.011] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Revised: 07/23/2018] [Accepted: 07/25/2018] [Indexed: 11/22/2022] Open
Abstract
The hexavalent chromium Cr(VI) poses a threat as a hazardous metal and its removal from aquatic environments through biosorption has gained attention as a viable technology of bioremediation. We evaluated the potential use of three green algae (Cladophora glomerata, Enteromorpha intestinalis and Microspora amoena) dry biomass as a biosorbent to remove Cr(VI) from aqueous solutions. The adsorption capacity of the biomass was determined using batch experiments. The adsorption capacity appeared to depend on the pH. The optimum pH with the acid-treated biomass for Cr(VI) biosorption was found to be 2.0 at a constant temperature, 45 °C. Among the three genera studied, C. glomerata recorded a maximum of 66.6% removal from the batch process using 1.0 g dried algal cells/100 ml aqueous solution containing an initial concentration of 20 mg/L chromium at 45 °C and pH 2.0 for 60 min of contact time. Langmuir and Freundlich isotherm equations fitted to the equilibrium data, Freundlich was the better model. Our study showed that C. glomerata dry biomass is a suitable candidate to remove Cr(VI) from aqueous solutions.
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30
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Khalid R, Aslam Z, Abbas A, Ahmad W, Ramzan N, Shawabkeh R. Adsorptive potential of Acacia nilotica based adsorbent for chromium(VI) from an aqueous phase. Chin J Chem Eng 2018. [DOI: 10.1016/j.cjche.2017.08.017] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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31
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Labied R, Benturki O, Eddine Hamitouche AY, Donnot A. Adsorption of hexavalent chromium by activated carbon obtained from a waste lignocellulosic material (Ziziphus jujuba cores): Kinetic, equilibrium, and thermodynamic study. ADSORPT SCI TECHNOL 2018. [DOI: 10.1177/0263617417750739] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
In aqueous solutions, hexavalent chromium Cr(VI) was successfully removed by activated carbon “ Z. jujuba rubidium carbonate-activated carbon” obtained from waste lignocellulosic material ( Ziziphus jujuba cores). Rubidium carbonate was used to prepare Z. jujuba rubidium carbonate-activated carbon by chemical activation using a 1:1 w/w ratio. Our results indicate that the obtained surface area of the activated carbon was equal to 608.31 m2/g. The adsorption study of Cr(VI) was investigated under batch conditions at constant stirring speed (220 r/min). Factors such as pH (1–6), temperature (20–40°C), adsorbent concentration (0.5–3 g/l), and initial Cr(VI) concentration (50–500 mg/l) were all studied to attain the maximum removal efficiency. Prior to the adsorption process, the morphology, elementary composition, and loss mass of activated carbon were characterized using scanning electron microscopy, X-ray fluorescence spectrometry, Fourier transform infrared spectroscopy, and thermogravimetric analysis. Fourier transform infrared analysis of the adsorbent demonstrated the presence of key functional groups associated with the adsorption phenomenon such as those of hydroxyl and aromatic groups. The obtained results showed that the optimal conditions for a maximum adsorption efficiency are 2 for pH, 1 g/l for activated carbon dosage and 100 mg/l for Cr(VI) concentration. The removal percentage increased from 27.2 to 62.08%. The kinetic sorption was described by a pseudo-second-order kinetic equation ( R2 ≈ 0.995). The Tóth ( R2 = 0.997) and Elovich models were best to explain the sorption phenomenon. Thermodynamic studies showed that the adsorption of Cr(VI) onto activated carbon was feasible, spontaneous, and endothermic at 20–40°C. This novel Z. jujuba rubidium carbonate-activated carbon derived from Z. jujuba core has been found to be effective for the removal of Cr(VI) and not harmful to the ecosystem.
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Affiliation(s)
- Radia Labied
- USTHB, Algeria; Centre de Recherche Scientifique et Technique en Analyses Physico-chimiques (C.R.A.P.C), Algeria
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32
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Sahu S, Sahu UK, Patel RK. Synthesis of thorium–ethanolamine nanocomposite by the co-precipitation method and its application for Cr(vi) removal. NEW J CHEM 2018. [DOI: 10.1039/c7nj05074g] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Studies on the adsorption of Cr(vi) from water by a thorium ethanolamine nanocomposite.
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Affiliation(s)
- Sumanta Sahu
- Department of Chemistry
- National Institute of Technology
- Rourkela
- India
| | - Uttam Kumar Sahu
- Department of Chemistry
- National Institute of Technology
- Rourkela
- India
| | - Raj Kishore Patel
- Department of Chemistry
- National Institute of Technology
- Rourkela
- India
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33
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López-González H, Serrano-Gómez J, Olguín MT, Hernández-López J, Bulbulian S. Removal of Co by carbonaceous material obtained through solution combustion of tamarind shell. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2017; 19:1126-1133. [PMID: 28521531 DOI: 10.1080/15226514.2017.1328393] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
New carbonaceous materials were obtained through solution combustion process of tamarind shell in the presence of urea and ammonium nitrate, and all of them were tested for Co removal. The effect of temperature (from 600 to 1000°C) and water volume on surface texture of carbonaceous material and its adsorptive capacity was evaluated. Scanning electron microscope, Fourier transform infrared spectroscopy, X-ray powder diffraction, and Brunauer-Emmett-Teller (BET) model were used to characterize the obtained carbonaceous material before applying for the removal of cobalt. The point of zero charge was also determined. The results indicate that BET-specific surface areas ranged from 6.40 to 216.72 m2g-1 for the carbonaceous materials obtained at 600, 700, 800, 900, and 1000°C. The one obtained at 900°C (CombTSF900) was found to be the most effective adsorbent for the removal of Co(II) ions from aqueous solutions, with a maximum sorption capacity (Qmax) of 43.56 mg/g. Carbonaceous material obtained through the solution combustion process improves morphological characteristics of adsorbent in a short time, and could be used as an alternative method for the removal of cobalt.
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Affiliation(s)
- H López-González
- a Departamento de Química , Instituto Nacional de Investigaciones Nucleares , Mexico , D. F. , Mexico
| | - J Serrano-Gómez
- a Departamento de Química , Instituto Nacional de Investigaciones Nucleares , Mexico , D. F. , Mexico
| | - M T Olguín
- a Departamento de Química , Instituto Nacional de Investigaciones Nucleares , Mexico , D. F. , Mexico
| | - J Hernández-López
- a Departamento de Química , Instituto Nacional de Investigaciones Nucleares , Mexico , D. F. , Mexico
- b Tecnológico de Estudios Superiores de San Felipe del Progreso , Avenida Tecnológico S/N, Ejido de San Felipe del Progreso, San Felipe del Progreso , México
| | - S Bulbulian
- c Centro de Ciencias Aplicadas y Desarrollo Tecnológico (CCADET), Universidad Nacional Autónoma de México, Ciudad de México, México
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Mondal MH, Malik S, Garain A, Mandal S, Saha B. Extraction of Natural Surfactant Saponin from Soapnut (Sapindus mukorossi) and its Utilization in the Remediation of Hexavalent Chromium from Contaminated Water. TENSIDE SURFACT DET 2017. [DOI: 10.3139/113.110523] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
AbstractIn this study optimization of extraction conditions for saponin from soapnut (Sapindus mukorossi) has been investigated. This investigation showed that a better extraction of saponin can be achieved with increasing the dielectric constant of solvent employed. The best yield was attained in a 50% v/v aqueous ethanol medium. Another objective of the present study is to assess the thermodynamics of the uptake-reduction of hexavalent chromium in contaminated water samples using saponin. Pyrene has been employed to determine the critical micellar concentration (CMC) (in the UV-vis method of determination) of saponin as a spectroscopic probe. Thus, the effectiveness of the bio-surfactant as a self-motivated adsorbent for hexavalent chromium is investigated. Several physico-chemical parameters like contact time, sorbate concentration, pH and temperature have been determined. The findings of the investigation invoked a very efficient uptake of 213.48 mg g−1 of hexavalent chromium from the contaminated water sample at a lower value of pH 2 and temperature 35°C. It is observed that the method followed a pseudo-first order kinetics, where the evaluated ΔG0 has supported the sorption as a feasible and spontaneous process. The HR-MS, FTIR, steady state Fluorescence spectroscopy, HR-TEM and UV-Vis spectroscopy have been employed for the current scientific studies.
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Affiliation(s)
- Monohar Hossain Mondal
- 1Department of Chemistry, Government General Degree College, Singur, Hooghly 712409, WB, India
- 2Bioremediation Laboratory, Department of Chemistry, The University of Burdwan 713104, WB, India
| | - Susanta Malik
- 2Bioremediation Laboratory, Department of Chemistry, The University of Burdwan 713104, WB, India
| | - Amit Garain
- 3Department of Inorganic and Physical Chemistry, Jadavpur University, Kolkata 700032, WB, India
| | - Sangita Mandal
- 2Bioremediation Laboratory, Department of Chemistry, The University of Burdwan 713104, WB, India
| | - Bidyut Saha
- 2Bioremediation Laboratory, Department of Chemistry, The University of Burdwan 713104, WB, India
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Anah L, Astrini N. Influence of pH on Cr(VI) ions removal from aqueous solutions using carboxymethyl cellulose-based hydrogel as adsorbent. ACTA ACUST UNITED AC 2017. [DOI: 10.1088/1755-1315/60/1/012010] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Saranya N, Nakeeran E, Giri Nandagopal MS, Selvaraju N. Optimization of adsorption process parameters by response surface methodology for hexavalent chromium removal from aqueous solutions using Annona reticulata Linn peel microparticles. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2017; 75:2094-2107. [PMID: 28498122 DOI: 10.2166/wst.2017.092] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Fruit peel microparticles of Annona reticulata Linn were used as biosorbent for the sequestration of hexavalent chromium (CR(VI)). Characterization of the biosorbent was done using scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDXS), Fourier transfer infrared spectroscopy (FTIR), gas chromatography-mass spectrometry (GCMS), carbon, hydrogen, nitrogen and sulphur (CHNS) elemental analysis, mercury intrusion porosimetry and point of zero charge. Influential parameters were optimized using response surface methodology (RSM) with a total of 17 experimental runs based on the Box-Behnken design and found to be pH 1.0, temperature 25 °C and 100 mg/L initial chromium concentration. pH and concentration were found to be more influential than temperature. The analysis of variance indicated that a second-order polynomial regression equation was the most suitable for fitting the experimental data. The experimental runs showed a good correlation with the predicted responses (R2 = 0.9956). The biosorption process fitted well with the Langmuir isotherm with an adsorption capacity of 108. 32 mg/g out of the other isotherms such as Freundlich and Dubinin-Radushkevich that were analyzed. Non linear pseudo first order, pseudo second order, and intraparticle diffusion kinetics were applied to describe the interaction between the biosorbent and Cr(VI). Desorption and regeneration performances showed that fruit peels of Annona reticulata Linn can be an environmental friendly option for hexavalent chromium removal from aqueous solutions.
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Affiliation(s)
- N Saranya
- Department of Chemical Engineering, National Institute of Technology Calicut, Calicut 673601, Kerala, India E-mail:
| | - E Nakeeran
- Department of Chemical Engineering, National Institute of Technology Calicut, Calicut 673601, Kerala, India E-mail:
| | - M S Giri Nandagopal
- Department of Chemical Engineering, National Institute of Technology Calicut, Calicut 673601, Kerala, India E-mail:
| | - N Selvaraju
- Department of Chemical Engineering, National Institute of Technology Calicut, Calicut 673601, Kerala, India E-mail:
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Kirupha SD, Narayanasamy R, Sornalatha M, Sivanesan S, Ravikumar L. Synthesis and metal ion uptake studies of chelating polyurethane resin containing donor atoms: Experimental optimization and temperature studies. CAN J CHEM ENG 2017. [DOI: 10.1002/cjce.22783] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Ramasamy Narayanasamy
- Department of Chemistry; Coimbatore Institute of Technology; Coimbatore 641014 India
| | - Manickam Sornalatha
- Department of Chemistry; Coimbatore Institute of Technology; Coimbatore 641014 India
| | | | - Lingam Ravikumar
- Department of Chemistry; CBM college; Affiliated with Bharathiar University, Coimbatore 641042; India
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Russo V, Trifuoggi M, Di Serio M, Tesser R. Fluid-Solid Adsorption in Batch and Continuous Processing: A Review and Insights into Modeling. Chem Eng Technol 2017. [DOI: 10.1002/ceat.201600582] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Vincenzo Russo
- University of Naples “Federico II”; Chemical Sciences Department; Via Cintia, 4 80126 Naples Italy
| | - Marco Trifuoggi
- University of Naples “Federico II”; Chemical Sciences Department; Via Cintia, 4 80126 Naples Italy
| | - Martino Di Serio
- University of Naples “Federico II”; Chemical Sciences Department; Via Cintia, 4 80126 Naples Italy
| | - Riccardo Tesser
- University of Naples “Federico II”; Chemical Sciences Department; Via Cintia, 4 80126 Naples Italy
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Optimization of Chromium Biosorption by Fungal Adsorbent, Trichoderma sp. BSCR02 and its Desorption Studies. HAYATI JOURNAL OF BIOSCIENCES 2017. [DOI: 10.1016/j.hjb.2017.08.005] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Dehghani MH, Sanaei D, Ali I, Bhatnagar A. Removal of chromium(VI) from aqueous solution using treated waste newspaper as a low-cost adsorbent: Kinetic modeling and isotherm studies. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2015.12.057] [Citation(s) in RCA: 267] [Impact Index Per Article: 33.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Kafilzadeh F, Saberifard S. Isolation and Identification of Chromium (VI)-Resistant Bacteria From Soltan Abad River Sediments (Shiraz-Iran). ACTA ACUST UNITED AC 2016. [DOI: 10.17795/jjhs-33576] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Zhou J, Wang Y, Wang J, Qiao W, Long D, Ling L. Effective removal of hexavalent chromium from aqueous solutions by adsorption on mesoporous carbon microspheres. J Colloid Interface Sci 2016; 462:200-7. [DOI: 10.1016/j.jcis.2015.10.001] [Citation(s) in RCA: 114] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2015] [Revised: 09/30/2015] [Accepted: 10/01/2015] [Indexed: 11/28/2022]
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Rangabhashiyam S, Selvaraju N. Efficacy of unmodified and chemically modified Swietenia mahagoni shells for the removal of hexavalent chromium from simulated wastewater. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2015.06.033] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Adsorption of hexavalent chromium from aqueous solution by activated carbon prepared from longan seed: Kinetics, equilibrium and thermodynamics. J IND ENG CHEM 2015. [DOI: 10.1016/j.jiec.2014.02.054] [Citation(s) in RCA: 223] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Kolya H, Roy A, Tripathy T. Starch-g-Poly-(N, N-dimethyl acrylamide-co-acrylic acid): An efficient Cr (VI) ion binder. Int J Biol Macromol 2015; 72:560-8. [DOI: 10.1016/j.ijbiomac.2014.09.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Accepted: 09/05/2014] [Indexed: 11/29/2022]
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Dhir B. Potential of biological materials for removing heavy metals from wastewater. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:1614-1627. [PMID: 24185905 DOI: 10.1007/s11356-013-2230-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2013] [Accepted: 10/09/2013] [Indexed: 05/13/2023]
Abstract
Agricultural products/by-products are natural sorbent materials that possess capacity for removing contaminants including heavy metals from wastewaters and hence can be exploited as replacement of costly methods for wastewater treatment. The sorption of heavy metals onto these biomaterials is attributed to constituent's proteins, carbohydrates, and phenolic compounds that contain functional groups such as carboxylate, hydroxyl, and amine. Natural efficiency of these materials for removing heavy metals can be enhanced by treating them with chemicals. The present review emphasizes their use in developing eco-friendly technology for a large-scale treatment of wastewater.
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Affiliation(s)
- Bhupinder Dhir
- Department of Genetics, University of Delhi South Campus, New Delhi, 110021, India.
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Tabatabaee Ghomshe SM, Aminzadeh R, Abarzani M. USE OF RESPONSE SURFACE METHODOLOGY TO STUDY THE COMBINED EFFECT OF VARIOUS PARAMETERS ON HEXAVALENT CHROMIUM ADSORPTION. CHEM ENG COMMUN 2013. [DOI: 10.1080/00986445.2013.766602] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Gagrai MK, Das C, Golder AK. Reduction of Cr(VI) into Cr(III) by Spirulina dead biomass in aqueous solution: kinetic studies. CHEMOSPHERE 2013; 93:1366-1371. [PMID: 24053944 DOI: 10.1016/j.chemosphere.2013.08.021] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Revised: 08/06/2013] [Accepted: 08/07/2013] [Indexed: 06/02/2023]
Abstract
Microalga species are potential scavengers of heavy metals. The active functional groups of a number of biomaterials are capable to detoxify Cr(VI) to Cr(III). A 2nd order kinetic model was developed in terms of concentration of protonated acidic groups of Spirulina sp. biomass for the reduction of Cr(VI) into Cr(III). Cr(VI) reduction reaction grounded on the concentration of functional groups was validated over a broad range of pH, temperature and anionic strength. Lower pH favoured Cr(VI) reduction reaction and the experimental results well fitted to the kinetic model. The overall rate constant, kt, decreased logarithmically from 22.7 to 2.8 mM⁻¹ s⁻¹ with rise of pH from 0.5 to 6.0. Whereas, k(t) increased nearly by 23% with elevation temperature from 25 to 45 °C. Higher concentration (>0.235 mM) of background anions (Cl⁻, SO₄²⁻ and NO₃⁻) was resulted in decreases in k(t) values. The rate constant expression developed can be employed to quantify Cr(VI) reduction into Cr(III) using Spirulina biomass.
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Affiliation(s)
- Mahesh Kumar Gagrai
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Assam 781 039, India
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Arunakumara KKIU, Walpola BC, Yoon MH. Banana Peel: A Green Solution for Metal Removal from Contaminated Waters. ACTA ACUST UNITED AC 2013. [DOI: 10.5338/kjea.2013.32.2.108] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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