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Strong OKL, France HE, Scotland K, Wright K, Vreugdenhil AJ. Selenite Adsorption and Reduction via Iron(II) Impregnated Activated Carbon Produced from the Phosphoric Acid Activation of Construction Waste Wood. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2023; 85:485-497. [PMID: 37816969 DOI: 10.1007/s00244-023-01032-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Accepted: 08/23/2023] [Indexed: 10/12/2023]
Abstract
Chemical activation of waste materials, to form activated carbon, (AC) is complicated by the large amounts of chemical activating agents required and wastewater produced. To address these problems, we have developed an optimized process for producing AC, by phosphoric acid activation of construction waste. Waste wood from construction sites was ground and treated with an optimized phosphoric acid digestion and activation that resulted in high surface areas (> 2000 m2/g) and a greater recovery of phosphoric acid. Subsequently the phosphoric acid activated carbon (PAC), was functionalized with iron salts and evaluated for its efficacy on the adsorption of selenite and selenate. Total phosphoric acid recovery was 96.7% for waste wood activated with 25% phosphoric acid at a 1:1 ratio, which is a substantially higher phosphoric acid recovery, than previous literature findings. Post activation impregnation of iron salts resulted in iron(II) species adsorbed to the PAC surface. The iron(II) chloride impregnated AC removed up to 11.41 ± 0.502 mg selenium per g Iron-PAC. Competitive ions such as sulfate and nitrate had little effect on selenium adsorption, however, phosphate concentration did negatively impact the selenium uptake at high phosphate levels. At 250 ppm, approximately 75% of adsorption capacity of both the selenate and the selenite solutions was lost, although selenium was still preferentially adsorbed. Peak adsorption occurred between a pH of 4 and 11, with a complete loss of adsorption at a pH of 13.
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Affiliation(s)
- Oliver K L Strong
- Material Science, Department of Chemistry, Trent University, 1600 West Bank Dr., Peterborough, ON, K9L 0G2, Canada
| | - Hamant E France
- Environmental and Life Sciences, Trent University, 1600 West Bank Dr., Peterborough, ON, K9L 0G2, Canada
| | - Kevin Scotland
- Material Science, Department of Chemistry, Trent University, 1600 West Bank Dr., Peterborough, ON, K9L 0G2, Canada
| | - Kelly Wright
- Material Science, Department of Chemistry, Trent University, 1600 West Bank Dr., Peterborough, ON, K9L 0G2, Canada
| | - Andrew J Vreugdenhil
- Material Science, Department of Chemistry, Trent University, 1600 West Bank Dr., Peterborough, ON, K9L 0G2, Canada.
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2
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Malhotra M, Roy M, Pal P. A membrane-based green and low-cost system for ensuring safe drinking water in a selenium-affected region. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 324:116361. [PMID: 36198222 DOI: 10.1016/j.jenvman.2022.116361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Revised: 09/17/2022] [Accepted: 09/22/2022] [Indexed: 06/16/2023]
Abstract
Towards an efficient, low-cost solution to the problem of contamination of groundwater by selenium leached out from earth's mineral crust, a new system is developed using a novel graphene-based nanocomposite membrane. The system not only purified selenium-contaminated groundwater with high degree but also ensured safe disposal of the rejected selenium through algorithmic chemical stabilization in a mineral matrix. All experiments were conducted with live contaminated water from selenium affected area rather than using synthetic solution in a semi-pilot unit involving a largely fouling-free flat sheet cross-flow membrane module. Pure water flux of up to 190 Lm-2h-1(LMH) with 96-97% selenium rejection at an optimum operating pressure of only 14 bar could be achieved. Rejected selenium was stabilized in mineral matrix through chemical coagulation-precipitation using suitable coagulants following prior optimization of the critical operating parameters by Model-based calibration toolbox (MATLAB R2020a). A high degree of stabilization efficiency (99.8%) could be achieved as reflected in an error-index of only 1.13%. For selenium-affected region, the membrane-integrated hybrid treatment system proved to be a potential candidate technology offering safe drinking water at an approximate cost of only 1.77 $/m3 which was found to be affordable to the consumers in subsequent willingness to pay survey.
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Affiliation(s)
- M Malhotra
- Environment and Membrane Technology Laboratory, Department of Chemical Engineering, National Institute of Technology Durgapur, 713209, India
| | - M Roy
- Department of Management Studies, National Institute of Technology Durgapur, 713209, India
| | - P Pal
- Environment and Membrane Technology Laboratory, Department of Chemical Engineering, National Institute of Technology Durgapur, 713209, India.
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3
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Luo Q, Chen D, Cui T, Duan R, Wen Y, Deng F, Li L, Wang H, Zhang Y, Xu R. Selenite elimination via zero-valent iron modified biochar synthesized from tobacco straw and copper slag: Mechanisms and agro-industrial practicality. Front Bioeng Biotechnol 2022; 10:1054801. [DOI: 10.3389/fbioe.2022.1054801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Accepted: 10/25/2022] [Indexed: 11/15/2022] Open
Abstract
Cost-effectively improving the performance of biochar is essential for its large-scale practical application. In this work, the agro-industrial by-products copper slag and tobacco straw were employed for the preparation of modified biochar (CSBC). The obtained CSBC exhibited satisfactory capacity on Se(IV) immobilization of 190.53 mg/g, with surface interactions determined by the monolayer and mainly chemisorption. The removal mechanisms included chemical reduction, electrostatic attraction, co-precipitation, and formation of complexations. Interestingly, the existence of Cu2Se structure after adsorption indicated the involvement of Cu species within Se(IV) elimination. Moreover, the industrial agricultural practicality of CSBC was evaluated by regeneration tests, economic assessment, and pot experiments. The results demonstrate that iron species-modified biochar prepared from two agro-industrial by-products is a promising and feasible candidate for selenite removal from wastewater.
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Li K, Zou S, Jin G, Yang J, Dou M, Qin L, Su H, Huang F. Efficient removal of selenite in aqueous solution by MOF-801 and Fe3O4/MOF-801: Adsorptive behavior and mechanism study. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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5
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Amin AMM, Rayan DA, Ahmed YMZ, El-Shall MS, Abdelbasir SM. Zinc ferrite nanoparticles from industrial waste for Se (IV) elimination from wastewater. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 312:114956. [PMID: 35398697 DOI: 10.1016/j.jenvman.2022.114956] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2021] [Revised: 02/20/2022] [Accepted: 03/20/2022] [Indexed: 06/14/2023]
Abstract
The presence of high concentrations of selenium ions in wastewater is considered an environmental problem. However, the mechanism of selenium ions (Se (IV)) removal by the adsorption process has not been investigated in-depth so far. Also, the recovery and conversion of the industrial waste materials into valuable materials is a vital issue. Therefore, in this study, zinc ferrite nanopowders are economically synthesized from steel-making wastes by co-precipitation method for investigating as adsorbents of selenium species. The produced nanopowders were annealed at 150, 300, 500, and 850 °C for 5 h to scrutinize the impact of annealing temperature on their crystallite size. The compositional, optical, and magnetic features of the nanopowders were defined by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM), UV-Vis. spectrophotometer along with vibrating sample magnetometer (VSM). Optical absorbance spectra were found characteristic due to the electronic structure of Fe3+ (3d5) considering the C3v local symmetry of Fe3+ ions. The prepared nanopowders demonstrated good adsorption capacity toward selenium ions (43.67 mg/g at pH 2.5) from an aqueous medium. Adsorption data were found fitting to Freundlich isotherm model. Thus, ZnFe2O4 can be recommended to effectively eliminate selenium ions from aqueous solutions.
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Affiliation(s)
- Amira M M Amin
- Refractory& Ceramic Materials Department (RCMD), Central Metallurgical Research and Development Institute (CMRDI), P.O. Box:87 Helwan (11421), Cairo, Egypt.
| | - Diaa A Rayan
- Electronic and Magnetic Materials Department, Central Metallurgical Research and Development Institute (CMRDI), P.O. Box:87 Helwan (11421), Cairo, Egypt
| | - Yasser M Z Ahmed
- Refractory& Ceramic Materials Department (RCMD), Central Metallurgical Research and Development Institute (CMRDI), P.O. Box:87 Helwan (11421), Cairo, Egypt
| | - M Samy El-Shall
- Department of Chemistry Virginia Commonwealth University Richmond, Virginia, 23284-2006, United States
| | - Sabah M Abdelbasir
- Electrochemical Processing Department, Central Metallurgical Research and Development Institute (CMRDI), P.O. Box:87 Helwan (11421), Cairo, Egypt
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6
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Abejón R. A Bibliometric Analysis of Research on Selenium in Drinking Water during the 1990-2021 Period: Treatment Options for Selenium Removal. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:5834. [PMID: 35627373 PMCID: PMC9140891 DOI: 10.3390/ijerph19105834] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 05/01/2022] [Accepted: 05/04/2022] [Indexed: 02/01/2023]
Abstract
A bibliometric analysis based on the Scopus database was carried out to summarize the global research related to selenium in drinking water from 1990 to 2021 and identify the quantitative characteristics of the research in this period. The results from the analysis revealed that the number of accumulated publications followed a quadratic growth, which confirmed the relevance this research topic is gaining during the last years. High research efforts have been invested to define safe selenium content in drinking water, since the insufficient or excessive intake of selenium and the corresponding effects on human health are only separated by a narrow margin. Some important research features of the four main technologies most frequently used to remove selenium from drinking water (coagulation, flocculation and precipitation followed by filtration; adsorption and ion exchange; membrane-based processes and biological treatments) were compiled in this work. Although the search of technological options to remove selenium from drinking water is less intensive than the search of solutions to reduce and eliminate the presence of other pollutants, adsorption was the alternative that has received the most attention according to the research trends during the studied period, followed by membrane technologies, while biological methods require further research efforts to promote their implementation.
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Affiliation(s)
- Ricardo Abejón
- Departamento de Ingeniería Química, Universidad de Santiago de Chile (USACH), Av. Libertador Bernardo O'Higgins 3363, Estación Central, Santiago 9170019, Chile
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Li T, Xu H, Zhang Y, Zhang H, Hu X, Sun Y, Gu X, Luo J, Zhou D, Gao B. Treatment technologies for selenium contaminated water: A critical review. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 299:118858. [PMID: 35041898 DOI: 10.1016/j.envpol.2022.118858] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 01/11/2022] [Accepted: 01/13/2022] [Indexed: 06/14/2023]
Abstract
Selenium is an indispensable trace element for humans and other organisms; however, excessive selenium in water can jeopardize the aquatic environment. Investigations on the biogeochemical cycle of selenium have shown that anthropogenic activities such as mining, refinery, and coal combustion mainly contribute to aquatic selenium pollution, imposing tremendous risks on ecosystems and human beings. Various technologies thus have been developed recently to treat selenium contaminated water to reduce its environmental impacts. This work provides a critical review on the applications, characteristics, and latest developments of current treatment technologies for selenium polluted water. It first outlines the present status of the characteristics, sources, and toxicity of selenium in water. Selenium treatment technologies are then classified into three categories: 1) physicochemical separation including membrane filtration, adsorption, coagulation/precipitation, 2) redox decontamination including chemical reduction and catalysis, and 3) biological transformation including microbial treatment and constructed wetland. Details of these methods including their overall efficiencies, applicability, advantages and drawbacks, and latest developments are systematically analyzed and compared. Although all these methods are promising in treating selenium in water, further studies are still needed to develop sustainable strategies based on existing and new technologies. Perspectives on future research directions are laid out at the end.
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Affiliation(s)
- Tianxiao Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, People's Republic of China
| | - Hongxia Xu
- Key Laboratory of Surficial Geochemistry of Ministry of Education, School of Earth Sciences and Engineering, Hydrosciences Department, Nanjing University, Nanjing, 210023, People's Republic of China.
| | - Yuxuan Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, People's Republic of China
| | - Hanshuo Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, People's Republic of China
| | - Xin Hu
- State Key Laboratory of Analytical Chemistry for Life Science, Center of Material Analysis and School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, People's Republic of China
| | - Yuanyuan Sun
- Key Laboratory of Surficial Geochemistry of Ministry of Education, School of Earth Sciences and Engineering, Hydrosciences Department, Nanjing University, Nanjing, 210023, People's Republic of China
| | - Xueyuan Gu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, People's Republic of China
| | - Jun Luo
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, People's Republic of China
| | - Dongmei Zhou
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, People's Republic of China
| | - Bin Gao
- Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL, 32611, USA
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Zoroufchi Benis K, McPhedran KN, Soltan J. Selenium removal from water using adsorbents: A critical review. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127603. [PMID: 34772553 DOI: 10.1016/j.jhazmat.2021.127603] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 10/05/2021] [Accepted: 10/23/2021] [Indexed: 06/13/2023]
Abstract
Selenium (Se) has become an increasingly serious water contamination concern worldwide. It is an essential micronutrient for humans and animals, however, can be extremely toxic if taken in excess. Sorption can be an effective treatment for Se removal from a wide range of water matrices. However, despite the synthesis and application of numerous adsorbents for remediation of aqueous Se, there has been no comprehensive review of the sorption capacities of various natural and synthesized sorbents. Herein, literature from 2010 to 2021 considering Se remediation using 112 adsorbents has been critically reviewed and presented in several comprehensive tables including: clay minerals and waste materials (presented in Table 1); zero-valent iron, iron oxides, and binary iron-based adsorbents (Table 2); other metals-based adsorbents (Table 3); carbon-based adsorbents (Table 4); and other adsorbents (Table 5). Each of these tables, and their relevant sections, summarizes preparation/modification methods, sorption capacities of various Se adsorbents, and proposed model/mechanisms of adsorption. Furthermore, future perspectives have been provided to assist in filling noted research gaps for the development of efficient Se adsorbents for real-world applications. This review will help in preliminary screening of various sorbent media to set up Se treatment technologies for a variety of end-users worldwide.
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Affiliation(s)
- Khaled Zoroufchi Benis
- Department of Chemical and Biological Engineering, University of Saskatchewan, Saskatoon, Saskatchewan, Canada; Global Institute for Water Security, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Kerry N McPhedran
- Department of Civil, Geological & Environmental Engineering, University of Saskatchewan, Saskatoon, Saskatchewan, Canada; Global Institute for Water Security, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
| | - Jafar Soltan
- Department of Chemical and Biological Engineering, University of Saskatchewan, Saskatoon, Saskatchewan, Canada; Global Institute for Water Security, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
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Huang T, Yuan G. Hollow Zinc Oxide Microflowers for Selective Preconcentration of Selenium Ions in Natural Water. CURR ANAL CHEM 2020. [DOI: 10.2174/1573411015666191122120331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
Selenium’s popularity in a wide variety of products and industries means
that it has, unfortunately, become a common environmental pollutant, particularly from sources such
as industrial wastewater discharge and agricultural runoff.
Objective:
Quantification of the selenium (IV) ion content of natural water sources via atomic fluorescence
spectrophotometry (AFS) was performed using hollow ZnO microflowers as the enriched
materials. The hollow ZnO microflowers were prepared via a hydrothermal method with polystyrene
(PS) microspheres as the template.
Methods:
Since the pH of the selenium (IV) solution is known to influence the degree of adsorption
onto the sorbent, both the acidity of adsorption and elution were studied at various pH values to obtain
the adsorption isotherm and adsorption capacity of the sorbent. AFS was used to quantify the
amount of selenium ion that was present in the samples. The structure of the hollow ZnO microflowers
was characterized using XRD, SEM, and TEM characterization methodologies.
Results:
When the pH was between 6.0 and 7.0, the percentage of Se (IV) adsorption was as high as
93%. It was found that the amount of Se (IV) that was eluted from the sorbent exceeded 96% with
5.0 mL of a 0.01 mol L−1 NaOH solution over the course of 10 minutes. The maximum adsorption
capacity was 31.5, 31.8, and 32.0 mg·g−1 at 273, 333, and 353 K, respectively.
Conclusion:
The LOD for Se (IV) detection via enrichment was achieved at 0.006 μg L−1 with a linear
range between 0.1 and 200 μg L−1. Thus, this method is applicable to the analysis of natural water
samples and GBW(E)080394.
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Affiliation(s)
- Ting Huang
- Department of Chemistry and Chemical Engineering, Ankang University, Ankang, Shaanxi 725000, China
| | - Guanghui Yuan
- Department of Chemistry and Chemical Engineering, Ankang University, Ankang, Shaanxi 725000, China
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Enhanced Selenate Removal in Aqueous Phase by Copper-Coated Activated Carbon. MATERIALS 2020; 13:ma13020468. [PMID: 31963770 PMCID: PMC7013655 DOI: 10.3390/ma13020468] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 01/11/2020] [Accepted: 01/13/2020] [Indexed: 12/31/2022]
Abstract
In this study, we prepared a novel sorbent derived from precipitating copper ion onto the surfaces of activated carbon (Cu-AC). The sorbents were comprehensively characterized by Brunauer–Emmett–Teller (BET), zeta potential analysis, SEM, XRD, and FTIR. Batch experiments were conducted to evaluate selenate removal by Cu-AC under different conditions. The results showed that Cu was uniformly coated on the AC surface. Copper pretreatment markedly decreased the specific surface area and total pore volume of AC, and changed its surface zeta potential from highly negative to low negative and even positive. The Cu-AC substantially improved selenate adsorption capacity from the 1.36 mg Se/g AC of raw AC to 3.32, 3.56, 4.23, and 4.48 mg Se/g AC after loading of 0.1, 0.5, 1.0, and 5 mmol Cu/g AC, respectively. The results of toxicity leaching test showed AC coated with ≤1.0 mmol Cu/g was acceptable for potential application. Selenate adsorption was significantly inhibited by high ionic strength (>50 mM NaCl) and pH (>10). The electrostatic attraction between positive surface charge of Cu-AC and selenate ions and hydrogen bonding between CuO and HSeO4− might contribute to selenate sorption. Evidence showed that the selenate adsorption might involve outer-sphere surface complexation. The adsorption data appeared to be better described by Langmuir than Freundlich isotherm. The spent adsorbent could be effectively regenerated by hydroxide for reuse. Only a little decrease of removal efficiency was observed in the second and third run. This study implies that Cu-coated AC is a potential adsorbent for sustainable removal selenate from relative low salinity water/wastewater.
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Xu L, Fu F. Se(IV) oxidation by ferrate(VI) and subsequent in-situ removal of selenium species with the reduction products of ferrate(VI): performance and mechanism. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2020; 55:528-536. [PMID: 31903843 DOI: 10.1080/10934529.2019.1710422] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 12/21/2019] [Accepted: 12/24/2019] [Indexed: 06/10/2023]
Abstract
In order to treat selenium pollution, the study presents the use of potassium ferrate (K2FeO4) as an environmentally friendly agent for in situ removal of Se(IV) from aqueous media. Batch experiments were carried out to evaluate the influences of various factors including dosage of K2FeO4, ex-situ and in-situ adsorption, initial pH, and adsorption isotherms. The results showed that increasing dosage of K2FeO4 benefited the removal of total selenium with the efficiency up to 97.0% and Se(IV) removal significantly depended on pH, and as the pH increases, the decrease in Se(IV) adsorption efficiency is a general trend of pH dependence. The X-ray powder diffraction, Fourier transformed infrared spectrometer and high-resolution X-ray photoelectron spectroscopy analysis indicated that Se(IV) was removed from the aqueous solution by adsorbing on the surface of the decomposition products of K2FeO4 which are ferric oxide nanoparticles, and the selenium adsorbed on the generated ferric oxide nanoparticles existed in the forms of Se(IV) and Se(VI). Se(IV) and Se(VI) were adsorbed to the decomposition products of K2FeO4 by forming an inner-sphere complexes and an outer-sphere complexes, respectively.
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Affiliation(s)
- Liang Xu
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, China
| | - Fenglian Fu
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, China
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Kalaitzidou K, Nikoletopoulos AA, Tsiftsakis N, Pinakidou F, Mitrakas M. Adsorption of Se(IV) and Se(VI) species by iron oxy-hydroxides: Effect of positive surface charge density. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 687:1197-1206. [PMID: 31412455 DOI: 10.1016/j.scitotenv.2019.06.174] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 05/20/2019] [Accepted: 06/11/2019] [Indexed: 05/26/2023]
Abstract
Batch and continuous mode experiments were used to determine the influence of physic-chemicals characteristics of iron oxy-hydroxides (FeOOHs) on selenium adsorption. Batch experiments and continuous flow rapid small-scale column tests (RSSCTs) at pH 7 and NSF (National Sanitation Foundation) water matrix, showed that the adsorption capacity of FeOOHs for Se(IV) is strongly related to positive surface charge density (PSCD), and gradually increases when synthesis pH is lowered. The highest PSCD value of 3.25 mmol [OH-]/g was observed at synthesis pH 2.5 (FeOOH/2.5) and the lowest, 0.45 mmol [OH-]/g, was observed at synthesis pH 9 (FeOOH/9). A thermodynamic study verified the endothermic (ΔΗ° 21.4 kJ/mol) chemisorption of Se(IV) by the qualified FeOOH/2.5. EXAFS data showed that Se(IV) is involved in three types of surface complexes: bidentate mononuclear edge-sharing (1E) and two types of binuclear inner-sphere (2C) linkage between the SeO32- pyramids, and Fe(O,OH)6 octahedra. The FeOOHs were evaluated by their adsorption capacity (Q10) at residual concentrations equal to the EU drinking water regulation limit of 10 μg/L, e.g. in conditions implemented in full-scale water treatment plants. The qualified FeOOH/2.5 was found to be the most effective for Se(IV) adsorption with a Q10 value 4.3 mg Se(IV)/g. In contrast, the Q10 value for Se(VI) was almost three orders of magnitude lower (10 μg Se(VI)/g) than that for Se(IV). Finally, regeneration experiments showed that FeOOHs reuse for Se(IV) removal is economically feasible and the recovery of selenium by precipitation as elemental Se contributes to green chemistry.
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Affiliation(s)
- Kyriaki Kalaitzidou
- Department of Chemical Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
| | | | - Nickolaos Tsiftsakis
- Department of Chemical Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Fani Pinakidou
- Department of Physics, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
| | - Manassis Mitrakas
- Department of Chemical Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
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Wongcharee S, Aravinthan V. Application of mesoporous magnetic nanosorbent developed from macadamia nut shell residues for the removal of recalcitrant melanoidin and its fractions. SEP SCI TECHNOL 2019. [DOI: 10.1080/01496395.2019.1606015] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Surachai Wongcharee
- School of Civil Engineering and Surveying, University of Southern Queensland, Toowoomba QLD, Australia
| | - Vasantha Aravinthan
- School of Civil Engineering and Surveying, University of Southern Queensland, Toowoomba QLD, Australia
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Peryshkov DV, Bukovsky EV, Lacroix MR, Wu H, Zhou W, Jones WM, Lozinšek M, Folsom TC, Heyliger DL, Udovic TJ, Strauss SH. Latent Porosity in Alkali-Metal M2B12F12 Salts: Structures and Rapid Room-Temperature Hydration/Dehydration Cycles. Inorg Chem 2017; 56:12023-12041. [DOI: 10.1021/acs.inorgchem.7b02081] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dmitry V. Peryshkov
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
- Department
of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Eric V. Bukovsky
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Matthew R. Lacroix
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Hui Wu
- Center for Neutron Research, National Institute of Standards and Technology (NIST), Gaithersburg, Maryland 20899, United States
| | - Wei Zhou
- Center for Neutron Research, National Institute of Standards and Technology (NIST), Gaithersburg, Maryland 20899, United States
| | - W. Matthew Jones
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Matic Lozinšek
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
- Department of Inorganic Chemistry and Technology, Jožef Stefan Institute, 1000 Ljubljana, Slovenia
| | - Travis C. Folsom
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - D. Luke Heyliger
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Terrence J. Udovic
- Center for Neutron Research, National Institute of Standards and Technology (NIST), Gaithersburg, Maryland 20899, United States
| | - Steven H. Strauss
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
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Lu J, Fu F, Ding Z, Li N, Tang B. Removal mechanism of selenite by Fe 3O 4-precipitated mesoporous magnetic carbon microspheres. JOURNAL OF HAZARDOUS MATERIALS 2017; 330:93-104. [PMID: 28212514 DOI: 10.1016/j.jhazmat.2017.01.056] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2016] [Revised: 01/24/2017] [Accepted: 01/30/2017] [Indexed: 06/06/2023]
Abstract
A mesoporous composite of magnetic carbon microspheres (MCMSs) was synthesized via introducing Fe3O4 nanoscale particles to the surface of carbon microspheres (CMSs) by coprecipitation. Scanning electron microscopy and transmission electron microscopy showed the Fe3O4 nanoscale particles were dispersedly immobilized on the surface of CMSs. The MCMSs demonstrated effective removal of selenite (Se(IV)) from wastewater. MCMSs showed the regular pattern where the lower pH value, the lower residual Se(IV) concentration. The coexisting sulfate, nitrate, chloride, carbonate, and silicate had no significant effect on Se(IV) removal, whereas phosphate hindered the removal of Se(IV) by competing with Se(IV) and formed inner-sphere complexes with Fe3O4 on the surface of MCMSs. Through X-ray photoelectron spectroscopy analysis, Se(IV) can not only form inner-sphere complexes with MCMSs, but also be reduced to insoluble elemental selenium (Se0) by Fe3O4 which was oxidized and formed γ-Fe2O3. Moreover, the superparamagnetic MCMSs can be easily separated from solution by means of an external magnetic field. The high removal efficiency for Se(IV) and rapid separability of MCMSs made them promising materials for the application in the practice.
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Affiliation(s)
- Jianwei Lu
- School of Environmental Science and Engineering and Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Fenglian Fu
- School of Environmental Science and Engineering and Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
| | - Zecong Ding
- School of Environmental Science and Engineering and Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Na Li
- School of Environmental Science and Engineering and Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Bing Tang
- School of Environmental Science and Engineering and Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
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Enhanced Adsorption of Selenium Ions from Aqueous Solution Using Iron Oxide Impregnated Carbon Nanotubes. Bioinorg Chem Appl 2017; 2017:4323619. [PMID: 28555093 PMCID: PMC5438866 DOI: 10.1155/2017/4323619] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2017] [Revised: 03/12/2017] [Accepted: 03/28/2017] [Indexed: 11/30/2022] Open
Abstract
The aim of this research was to investigate the potential of raw and iron oxide impregnated carbon nanotubes (CNTs) as adsorbents for the removal of selenium (Se) ions from wastewater. The original and modified CNTs with different loadings of Fe2O3 nanoparticles were characterized using high resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), X-ray diffractometer (XRD), Brunauer, Emmett, and Teller (BET) surface area analyzer, thermogravimetric analysis (TGA), zeta potential, and energy dispersive X-ray spectroscopy (EDS). The adsorption parameters of the selenium ions from water using raw CNTs and iron oxide impregnated carbon nanotubes (CNT-Fe2O3) were optimized. Total removal of 1 ppm Se ions from water was achieved when 25 mg of CNTs impregnated with 20 wt.% of iron oxide nanoparticles is used. Freundlich and Langmuir isotherm models were used to study the nature of the adsorption process. Pseudo-first and pseudo-second-order models were employed to study the kinetics of selenium ions adsorption onto the surface of iron oxide impregnated CNTs. Maximum adsorption capacity of the Fe2O3 impregnated CNTs, predicted by Langmuir isotherm model, was found to be 111 mg/g. This new finding might revolutionize the adsorption treatment process and application by introducing a new type of nanoadsorbent that has super adsorption capacity towards Se ions.
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Mahaninia MH, Wilson LD. A Kinetic Uptake Study of Roxarsone Using Cross-Linked Chitosan Beads. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.6b04412] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mohammad H. Mahaninia
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK Canada, S7N 5C9
| | - Lee D. Wilson
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK Canada, S7N 5C9
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18
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Phosphate uptake studies of cross-linked chitosan bead materials. J Colloid Interface Sci 2017; 485:201-212. [DOI: 10.1016/j.jcis.2016.09.031] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2016] [Revised: 09/13/2016] [Accepted: 09/14/2016] [Indexed: 11/21/2022]
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19
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Udoetok IA, Dimmick RM, Wilson LD, Headley JV. Adsorption properties of cross-linked cellulose-epichlorohydrin polymers in aqueous solution. Carbohydr Polym 2016; 136:329-40. [DOI: 10.1016/j.carbpol.2015.09.032] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2015] [Revised: 09/05/2015] [Accepted: 09/10/2015] [Indexed: 11/29/2022]
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Xue C, Wilson LD. Kinetic study on urea uptake with chitosan based sorbent materials. Carbohydr Polym 2015; 135:180-6. [PMID: 26453866 DOI: 10.1016/j.carbpol.2015.08.090] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Revised: 08/26/2015] [Accepted: 08/27/2015] [Indexed: 11/16/2022]
Abstract
A one-pot kinetic uptake study of urea in aqueous solution with various chitosan sorbent materials such as pristine chitosan, cross-linked chitosan with glutaraldehyde from low (C-1) to higher (C-2) glutaraldehyde content, and a Cu(II) complex of a glutaraldehyde cross-linked chitosan material (C-3) is reported herein. The kinetic uptake profiles were analyzed by the pseudo-first order (PFO) and pseudo-second-order (PSO) models, respectively. The uptake rate constant of urea and the sorption capacity (qe) of high molecular weight (HMW) chitosan, C-1, C-2, and C-3 were best described by the PFO model. The uptake rate constant of urea with the various sorbents is listed in ascending order: HMW chitosan<C-1<C-2≈C-3. The qe values (mg urea/g sorbent) for the sorbent/urea systems are listed in ascending order: HMW chitosan (48.1)≈C-1 (44.7)<C-2 (51.3)<C-3 (66.4mg/g), revealing good agreement with uptake values obtained independently at equilibrium conditions. Cross-linked chitosan displays relatively rapid urea uptake and greater adsorption capacity when compared with pristine chitosan. The observed trends are in agreement with the greater surface accessibility and pore structure properties of cross-linked chitosan based on scanning electron microscopy studies. These results further illustrate the rational design of chitosan-based materials for the controlled uptake of urea in aquatic environments.
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Affiliation(s)
- Chen Xue
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
| | - Lee D Wilson
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada.
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