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Gao S, Wang Q, Nie J, Poon CS, Yin H, Li JS. Arsenate(V) removal from aqueous system by using modified incinerated sewage sludge ash (ISSA) as a novel adsorbent. CHEMOSPHERE 2021; 270:129423. [PMID: 33401069 DOI: 10.1016/j.chemosphere.2020.129423] [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: 10/16/2020] [Revised: 12/18/2020] [Accepted: 12/22/2020] [Indexed: 06/12/2023]
Abstract
Adsorption methods have been widely used in wastewater treatment due to its high removal efficiency, easy operation and handling, economic efficiency and little secondary pollution to the environment. In this paper, a high-iron containing incineration sewage sludge ash (ISSA) was modified by combined acid leaching and precipitation processes to improve its adsorption capacity of As(V). The effects of pH, time, temperature and ionic strength on the adsorption of As(V) were investigated by batch adsorption experiments. The results indicated that iron (mainly present as hematite) in the ISSA was rearranged to Fe(SO4)OH. The modified ISSA showed an excellent adsorption potential for As(V) under acidic conditions and the adsorption capacity was around 9 times of the unmodified ISSA at pH 2-3. The adsorption process was fast during the first 2 h and reached an equilibrium at around 6 h. The Freundlich model could well fit the adsorption isotherm data, the presence of NO3- and Cl- had a negligible influence on the As(V) removal by the modified ISSA, while PO43- and SO42- could significantly suppress As(V) removal via competitive adsorption. After 3 cycles of regeneration, the modified ISSA still showed a satisfying adsorption capacity. As(V) was removed by the modified ISSA mainly through ligand exchange reaction with hydroxyl oxygen (OH-) to form inner-sphere complexes. Therefore, the modified ISSA can be a promising material for As(V) removal from wastewater in particular due to the waste recycling potential.
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Affiliation(s)
- Shengya Gao
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, China; Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China
| | - Qiming Wang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, China; IRSM-CAS/HK PolyU Joint Laboratory on Solid Waste Science, Hung Hom, Kowloon, Hong Kong
| | - Jing Nie
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, China
| | - Chi Sun Poon
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, China; IRSM-CAS/HK PolyU Joint Laboratory on Solid Waste Science, Hung Hom, Kowloon, Hong Kong.
| | - Hui Yin
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China
| | - Jiang-Shan Li
- State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China; IRSM-CAS/HK PolyU Joint Laboratory on Solid Waste Science, Hung Hom, Kowloon, Hong Kong.
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Al-Ghouti MA, Khan M, Nasser MS, Al Saad K, Ee Heng OON. Physiochemical characterization and systematic investigation of metals extraction from fly and bottom ashes produced from municipal solid waste. PLoS One 2020; 15:e0239412. [PMID: 33091005 PMCID: PMC7580925 DOI: 10.1371/journal.pone.0239412] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 09/05/2020] [Indexed: 11/18/2022] Open
Abstract
Incineration has emerged as one of the acceptable ways to treat municipal solid waste (MSW) due to its potential in reducing the mass and volume of the waste. However, it produces two major by-product residues, namely MSW-bottom ash (MSW-BA) and MSW-fly ash (MSW-FA). These residues have gained great attention to their hazardous nature and potential to be reused and recycled. In this paper, the physicochemical characterizations of the MSW-BA and the MSW-FA were performed, followed by a systematic investigation of metals extraction from MSW-BA and MSW-FA. Various extracting agents were used to investigate the possibility to extract 21 metals including cadmium (Cd), vanadium (V), chromium (Cr), and lead (Pb). It was revealed that some metals were present in a high amount in the MSW-BA while other metals were higher in the MSW-FA. Moreover, the energy-dispersive X-ray spectroscopy results revealed that the MSW-BA was dominated by oxygen (O) 55.4 ±0.6 wt%, silicon (Si) 22.5 ±0.3 wt%, and calcium (Ca) 18.5 ±0.2 wt%. On the other hand, the MSW-FA was enriched with Ca 45.2 ±0.5 wt%, and O 40.3 ±0.4 wt%. From the scanning electron microscopy, the MSW-BA was observed as flaky with an irregular surface that consisted of large pores, while, the MSW-FA was present as agglomerated particles and had a bimodal distribution. Moreover, Fourier transform infrared spectroscopy revealed that Al-Fe-OH, Al-Al-OH, Si-O, C-O, and C-H were some of the major functional groups present in the ashes. The F-tests concluded that the metal extraction from the MSW-BA and MSW-FA were significantly affected by the acid type. it is concluded that nitric acid and phosphoric acid were the best-suited acid for the MSW-BA while sulfuric acid and phosphoric acid for the MSW-FA. More than 11 wt% of Cd and 9 wt% of Cu were extracted from MSW-BA while 6 wt% of Pb and 4.5 wt% of V were extracted from the MSW-FA. The present methodology is an interesting development in metal extraction from the MSW-BA and the MSW-FA, which can develop in a cost-effective and sustainable option to utilize MSW.
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Affiliation(s)
- Mohammad A. Al-Ghouti
- Department of Biological and Environmental Sciences, College of Arts and Sciences, Doha, Qatar University, State of Qatar, Western Asia
- * E-mail:
| | - Mariam Khan
- Department of Biological and Environmental Sciences, College of Arts and Sciences, Doha, Qatar University, State of Qatar, Western Asia
| | - Mustafa S. Nasser
- Gas Processing Center, College of Engineering, Qatar University, Doha, State of Qatar, Western Asia
| | - Khalid Al Saad
- Department of Chemistry and Earth Sciences, College of Arts and Sciences, Qatar University, Doha, State of Qatar, Western Asia
| | - O. O. N. Ee Heng
- Domestic Solid Waste Management Centre (DSWMC), Doha, State of Qatar, Western Asia
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Qiu Q, Jiang X, Lv G, Chen Z, Lu S, Ni M, Yan J, Deng X. Adsorption of heavy metal ions using zeolite materials of municipal solid waste incineration fly ash modified by microwave-assisted hydrothermal treatment. POWDER TECHNOL 2018. [DOI: 10.1016/j.powtec.2018.05.003] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Jiang L, Ye Q, Chen J, Chen Z, Gu Y. Preparation of magnetically recoverable bentonite-Fe 3O 4-MnO 2 composite particles for Cd(II) removal from aqueous solutions. J Colloid Interface Sci 2017; 513:748-759. [PMID: 29220689 DOI: 10.1016/j.jcis.2017.11.063] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 11/09/2017] [Accepted: 11/20/2017] [Indexed: 11/17/2022]
Abstract
In this study, bentonite-Fe3O4-MnO2 composite was synthesized by combining bentonite with Fe3O4 and MnO2 through co-precipitation. Vibrating-sample magnetometry, scanning electron microscopy with energy-dispersive X-ray spectrometry, transmission electron microscopy, Brunauer-Emmett-Teller measurements, and X-ray powder diffraction techniques were used to characterize the composite. The composite consists of Fe3O4 nanoparticles orderly assembled on the surface of bentonite and an outer layer of MnO2 sheets. The composite's particles possess a saturation magnetization of 13.4-30.5 emu/g and a high specific surface area (203.89 m2/g). The adsorption behaviors of the composite in Cd(II) removal were evaluated by batch equilibrium experiments. Kinetic and isothermal data fit well the pseudo-second-order and the Freundlich models, respectively. Adsorption reached equilibrium within 30 min, and the Freundlich capacity of the composite was 35.35 mg/g. The adsorption capacity of Cd(II) increased with increasing pH and was dependent on the ionic strength. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy showed the combination of surface hydroxyl groups of the composite and Cd(II) in the solution. The prepared composite can be easily recycled and reused by taking advantage of its magnetic properties. The results show that the designed composite is a promising absorbent for the treatment of Cd-contaminated water.
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Affiliation(s)
- Liying Jiang
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, China.
| | - Qichao Ye
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, China
| | - Jianmeng Chen
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, China
| | - Zhong Chen
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore.
| | - Youli Gu
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, China
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Singh S, Srivastava VC, Mandal TK, Mall ID, Lo SL. Synthesis and application of green mixed-metal oxide nano-composite materials from solid waste for dye degradation. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2016; 181:146-156. [PMID: 27341375 DOI: 10.1016/j.jenvman.2016.06.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Revised: 05/26/2016] [Accepted: 06/05/2016] [Indexed: 06/06/2023]
Abstract
Present study demonstrates reutilization of electrochemical (EC) sludge as a potential low-cost green catalyst for dye degradation. Hexagonal Fe2O3 type phase with trevorite (NiFe2O4)-type cubic phase nanocomposite material (NCM) was synthesized from solid waste sludge generated during EC treatment of textile industry wastewater with stainless steel electrode. For NCM synthesis, sludge was heated at different temperatures under controlled condition. Various synthesized NCMs were characterized by powder X-ray diffraction (PXD), energy dispersive X-ray (EDX) spectroscopy and X-ray photoelectron spectroscopy (XPS) analysis. The synthesized NCMs were found to contain iron, chromium, nickel and oxygen in the form of α-Fe2O3 (metal: oxygen = 40:60), (Fe,Cr,Ni)2O3 and trevorite NiFe2O4, (Ni,Fe,Cr) (Fe,Cr,Ni)2O4 (metal: oxygen = 43:57). Field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), pore size distribution, and atomic force microscope (AFM) analysis showed distribution of grains of different shapes and sizes. Catalytic activity of NCM was studied by the methylene red dye degradation by using the catalytic wet peroxidation process. Zeta potential study was performed under different pH so as to determine the performance of the NCMs during dye degradation.
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Affiliation(s)
- Seema Singh
- Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India; Graduate Institute of Environmental Engineering, National Taiwan University, 71, Chou-Shan Rd., Taipei 106, Taiwan
| | - Vimal Chandra Srivastava
- Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India.
| | - Tapas Kumar Mandal
- Department of Chemistry, Indian Institute of Technology, Roorkee, Roorkee 247667, Uttarakhand, India
| | - Indra Deo Mall
- Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India; Department of Chemical Engineering, University of Petroleum & Energy Studies, Dehradun 248007, Uttarakhand, India
| | - Shang Lien Lo
- Graduate Institute of Environmental Engineering, National Taiwan University, 71, Chou-Shan Rd., Taipei 106, Taiwan
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Zhang K, Zhang D, Zhang K. Arsenic removal from water using a novel amorphous adsorbent developed from coal fly ash. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2016; 73:1954-1962. [PMID: 27120650 DOI: 10.2166/wst.2016.028] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A novel effective adsorbent of alumina/silica oxide hydrate (ASOH) for arsenic removal was developed through simple chemical reactions using coal fly ash. The iron-modified ASOH with enhancing adsorption activity was further developed from raw fly ash based on the in situ technique. The adsorbents were characterized by X-ray diffraction, Fourier transform infrared spectrometry, scanning electron micrograph, laser particle size and Brunauer-Emmet-Teller surface area. The results show that the adsorbents are in amorphous and porous structure, the surface areas of which are 8-12 times that of the raw ash. The acidic hydrothermal treatment acts an important role in the formation of the amorphous structure of ASOH rather than zeolite crystal. A series of adsorption experiments for arsenic on them were studied. ASOH can achieve a high removal efficiency for arsenic of 96.4% from water, which is more than 2.5 times that of the raw ash. Iron-modified ASOH can enhance the removal efficiency to reach 99.8% due to the in situ loading of iron (Fe). The condition of synthesis pH = 2-4 is better for iron-modified ASOH to adsorb arsenic from water.
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Affiliation(s)
- Kaihua Zhang
- Beijing Key Laboratory of Emission Surveillance and Control for Thermal Power Generation, North China Electric Power University, Beijing 102206, China E-mail: ; Department of Energy Power & Mechanical Engineering, North China Electric Power University, Beijing 102206, China
| | - Dongxue Zhang
- Department of Energy Power & Mechanical Engineering, North China Electric Power University, Beijing 102206, China
| | - Kai Zhang
- Beijing Key Laboratory of Emission Surveillance and Control for Thermal Power Generation, North China Electric Power University, Beijing 102206, China E-mail: ; Department of Energy Power & Mechanical Engineering, North China Electric Power University, Beijing 102206, China
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Study of the adsorption of Cd (II) from aqueous solution using zeolite-based geopolymer, synthesized from coal fly ash; kinetic, isotherm and thermodynamic studies. ARAB J CHEM 2015. [DOI: 10.1016/j.arabjc.2013.02.018] [Citation(s) in RCA: 163] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Pradhan P, Chakraborty R. Fly ash supported Ni―Fe solid acid catalyst for efficient production of diesel additive: intensification through far-infrared radiation. ASIA-PAC J CHEM ENG 2015. [DOI: 10.1002/apj.1930] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Piasy Pradhan
- Chemical Engineering Department; Jadavpur University; Kolkata 700032 India
| | - Rajat Chakraborty
- Chemical Engineering Department; Jadavpur University; Kolkata 700032 India
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Zhu J, Baig SA, Sheng T, Lou Z, Wang Z, Xu X. Fe3O4 and MnO2 assembled on honeycomb briquette cinders (HBC) for arsenic removal from aqueous solutions. JOURNAL OF HAZARDOUS MATERIALS 2015; 286:220-8. [PMID: 25585269 DOI: 10.1016/j.jhazmat.2015.01.004] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Revised: 12/16/2014] [Accepted: 01/02/2015] [Indexed: 05/21/2023]
Abstract
In this study, a novel composite adsorbent (HBC-Fe3O4-MnO2) was synthesized by combining honeycomb briquette cinders (HBC) with Fe3O4 and MnO2 through a co-precipitation process. The purpose was to make the best use of the oxidative property of MnO2 and the adsorptive ability of magnetic Fe3O4 for enhanced As(III) and As(V) removal from aqueous solutions. Experimental results showed that the adsorption capacity of As(III) was observed to be much higher than As(V). The maximum adsorption capacity (2.16 mg/g) was achieved for As(III) by using HBC-Fe3O4-MnO2 (3:2) as compared to HBC-Fe3O4-MnO2 (2:1) and HBC-Fe3O4-MnO2 (1:1). The experimental data of As(V) adsorption fitted well with the Langmuir isotherm model, whereas As(III) data was described perfectly by Freundlich model. The pseudo-second-order kinetic model was fitted well for the entire adsorption process of As(III) and As(V) suggesting that the adsorption is a rate-controlling step. Aqueous solution pH was found to greatly affect the adsorption behavior. Furthermore, co-ions including HCO3(-) and PO4(3-) exhibited greater influence on arsenic removal efficiency, whereas Cl(-), NO3(-), SO4(2-) were found to have negligible effects on arsenic removal. Five consecutive adsorption-regeneration cycles confirmed that the adsorbent could be reusable for successive arsenic treatment and can be used in real treatment applications.
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Affiliation(s)
- Jin Zhu
- Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, People's Republic of China
| | - Shams Ali Baig
- Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, People's Republic of China
| | - Tiantian Sheng
- Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, People's Republic of China
| | - Zimo Lou
- Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, People's Republic of China
| | - Zhuoxing Wang
- Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, People's Republic of China
| | - Xinhua Xu
- Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, People's Republic of China.
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Singh P, Bajpai J, Bajpai AK, Shrivastava RB. Development of Novel Iron Crosslinked CMC Nanoadsorbents for the Remediation of Arsenic Ions. SEP SCI TECHNOL 2015. [DOI: 10.1080/01496395.2014.973510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Sheng T, Baig SA, Hu Y, Xue X, Xu X. Development, characterization and evaluation of iron-coated honeycomb briquette cinders for the removal of As(V) from aqueous solutions. ARAB J CHEM 2014. [DOI: 10.1016/j.arabjc.2013.05.032] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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12
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Singh S, Srivastava VC, Mandal TK, Mall ID. Synthesis of different crystallographic Al2O3 nanomaterials from solid waste for application in dye degradation. RSC Adv 2014. [DOI: 10.1039/c4ra08842e] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Recycling of sludge generated during electrochemical treatment to synthesize alumina nanomaterials with different crystallographic orientations.
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Affiliation(s)
- Seema Singh
- Department of Chemical Engineering
- Indian Institute of Technology Roorkee
- Roorkee-247667, India
| | | | - Tapas Kumar Mandal
- Department of Chemistry
- Indian Institute of Technology Roorkee
- Roorkee-247667, India
| | - Indra Deo Mall
- Department of Chemical Engineering
- Indian Institute of Technology Roorkee
- Roorkee-247667, India
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Artificial neural network (ANN) approach for modeling of Cr(VI) adsorption from aqueous solution by zeolite prepared from raw fly ash (ZFA). J IND ENG CHEM 2013. [DOI: 10.1016/j.jiec.2012.12.001] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Polowczyk I, Bastrzyk A, Koźlecki T, Sawiński W, Rudnicki P, Sokołowski A, Sadowski Z. Use of fly ash agglomerates for removal of arsenic. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2010; 32:361-366. [PMID: 20383564 DOI: 10.1007/s10653-010-9306-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2009] [Accepted: 09/02/2009] [Indexed: 05/29/2023]
Abstract
The aim of this work is to investigate the application of fly ash adsorbent for removal of arsenite ions from dilute solution (100-1,000 ppm). Experiments were carried out using material from the "Turów" (Poland) brown-coal-burning power plant, which was wetted, then mixed and tumbled in a granulator to form spherical agglomerates. Measurements of arsenic adsorption from aqueous solution were carried out at room temperature and natural pH of fly ash agglomerates, in either a shaken flask or circulating column, to compare two different methods of contacting solution with adsorbent. Adsorption isotherms of arsenic were determined for agglomerated material using the Freundlich equation. Kinetic studies indicated that sorption follows a pseudo-second-order model. Preferable method to carry out the process is continuous circulation of arsenite solution through a column.
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Affiliation(s)
- Izabela Polowczyk
- Faculty of Chemistry, Department of Chemical and Process Engineering, Wrocław University of Technology, Norwida 4/6, 50-373 Wrocław, Poland.
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Li Y, Zhang FS, Xiu FR. Arsenic (V) removal from aqueous system using adsorbent developed from a high iron-containing fly ash. THE SCIENCE OF THE TOTAL ENVIRONMENT 2009; 407:5780-5786. [PMID: 19651428 DOI: 10.1016/j.scitotenv.2009.07.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2009] [Revised: 07/06/2009] [Accepted: 07/10/2009] [Indexed: 05/28/2023]
Abstract
A novel adsorbent for arsenic (V) removal from wastewater was developed through simple chemical processes using a special iron-abundant fly ash. In the synthesis process, the inherent iron in the fly ash was rearranged and loaded on the surface of the fly ash by dissolution and precipitation processes. The adsorbent (HIOFAA) was characterized by XRD, FT-IR, SEM, LPS and BET surface area. The results showed that porous amorphous FeOOH was loaded on the surface of HIOFAA successfully. The BET surface area of HIOFAA was 22 times of those of the original fly ash, and furthermore, the mean particle size of HIOFAA increased 3 times compared to the raw fly ash, thus effectively accelerated the solid/liquid separation after the adsorptive treatment. The adsorption isotherm data could be well described by Langmuir isotherm model, and the adsorption capacity for arsenic removal was 19.46 mg g(-1). Accordingly, it is believed that the adsorbent developed in this study is effective for arsenic polluted wastewater treatment.
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Affiliation(s)
- Yi Li
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, China
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