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Tolkou AK, Tsoutsa EK, Kyzas GZ, Katsoyiannis IA. Sustainable use of low-cost adsorbents prepared from waste fruit peels for the removal of selected reactive and basic dyes found in wastewaters. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:14662-14689. [PMID: 38280170 PMCID: PMC10884073 DOI: 10.1007/s11356-024-31868-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 12/29/2023] [Indexed: 01/29/2024]
Abstract
Agricultural wastes are potential sustainable adsorbents since they are available in large quantities, are low-cost, and may require little or no treatment, in some cases. In this study, several fruit peels, such as banana, orange, and pomegranate, were collected from local markets and prepared by a simple and eco-friendly method and used as natural adsorbents for the removal of both anionic (Reactive Red 120 (RR120), Reactive Black 5 (RB5), Remazol Brilliant Blue R (RBBR)) and cationic Methylene Blue (MB) dyes found in wastewaters. Many industries, such as leather and textiles, can release huge amounts of synthetic dyes into the wastewater during dyeing processes. These are one of the most important pollutants of water pollution as they cause enormous damage to the water body and also affect the health of organisms due to their toxicity and carcinogenicity. The search for a sustainable and at the same time efficient material for the removal of a wide variety of dyes is the innovation of this work. These peels were prepared by washing, drying, grinding, and finally sieving, under natural sustainable conditions. Porosometry (BET analysis), FTIR, SEM/EDS, and XRD techniques were used to characterize the fruit peels before and after the adsorption process. Factors affecting the adsorption of dyes (adsorbent dosage, pH solution, initial concentration of dyes, contact time, and temperature) were investigated. According to the results, in terms of the effectiveness of fruit peels as (natural) adsorbent materials, for anionic dyes, 5.0-6.0 g/L of banana or orange dry peels was sufficient to remove near or even more than 90% anionic dyes at pH 2.0, and 4.0 g/L was sufficient to remove 98% of cationic MB dye at pH 9.0. Similar amount of pomegranate peels had lower efficiency for anionic dyes (50-70%), while cationic MB was still efficiently removed (98%) at pH 9.0. Moreover, the adsorption process in all cases was found to better fit to pseudo-second-order model, in comparison to pseudo-first-order model. According to isotherms, Freundlich model fitted better in some cases to the equilibrium data, while the Langmuir model in others. Finally, this study demonstrates the viability of reusing the banana, orange, and pomegranate peel adsorbents for eight, four, and five cycles, showing a gradual reduction of around 50% of their effectiveness.
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Affiliation(s)
- Athanasia K Tolkou
- Department of Chemistry, International Hellenic University, 65404, Kavala, Greece
| | - Eleftheria K Tsoutsa
- Department of Chemistry, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
| | - George Z Kyzas
- Department of Chemistry, International Hellenic University, 65404, Kavala, Greece
| | - Ioannis A Katsoyiannis
- Department of Chemistry, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece.
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2
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Ji X, Zhu M, Li M, Wang N, Li M, Song L, Shan R. Adsorption and Degradation of Organics in Wastewater on Municipal Sludge. ACS OMEGA 2023; 8:33349-33357. [PMID: 37744794 PMCID: PMC10515174 DOI: 10.1021/acsomega.3c02765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2023] [Accepted: 08/25/2023] [Indexed: 09/26/2023]
Abstract
Adsorption and degradation of organic compounds on sludge were investigated by comparing activated and inactivated sludge at various dosages, pH values, and temperatures. The organic compounds in wastewater were identified and evaluated through fluorescence spectra. The results show that optimum adsorption occurred as the activated and inactivated sludge concentration was 4000 mg/L at a pH of 7.99 and a temperature of 30 °C. The fluorescence scanning spectrum indicated that activated sludge could remove protein-like organic matter, fulvic acid-like organic matter, and humic acid-like organic matter by 22.1, 9.4, and 41.2%, respectively, via adsorption only or by 25.9, 9.8, and 74.3%, respectively, via adsorption and degradation. Under optimum conditions, by using the good adsorption performance of sludge combined with other sewage treatment technologies, the treatment of high-content organic wastewater can be achieved.
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Affiliation(s)
- Xuyi Ji
- School
of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan 250101, China
| | - Mingxuan Zhu
- Shandong
Jianzhu University Design Group CO.LTD, Jinan 250101, China
| | - Man Li
- Shandong
Soil Pollution Control Center, Jinan 250101, China
| | - Ning Wang
- School
of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan 250101, China
- Resources
and Environment Innovation Institute, Shandong
Jianzhu University, Jinan 250101, China
| | - Mei Li
- School
of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan 250101, China
- Resources
and Environment Innovation Institute, Shandong
Jianzhu University, Jinan 250101, China
| | - Li Song
- Department
of Obstetrics and Gynecology, Qilu Hospital
of Shandong University, Jinan 250012, China
| | - Rui Shan
- Guangzhou
Institute of Energy Conversion Chinese Academy of Science, Guangzhou 510640, P. R. China
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3
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Ndlovu LN, Malatjie KI, Donga C, Mishra AK, Nxumalo EN, Mishra SB. Catalytic degradation of methyl orange using beta cyclodextrin modified polyvinylidene fluoride mixed matrix membranes imbedded with in‐situ generated palladium nanoparticles. J Appl Polym Sci 2022. [DOI: 10.1002/app.53270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Lloyd N. Ndlovu
- Institute for Nanotechnology and Water Sustainability, College of Science, Engineering and Technology University of South Africa Johannesburg South Africa
| | - Kgolofelo I. Malatjie
- Institute for Nanotechnology and Water Sustainability, College of Science, Engineering and Technology University of South Africa Johannesburg South Africa
| | - Cabangani Donga
- Institute for Nanotechnology and Water Sustainability, College of Science, Engineering and Technology University of South Africa Johannesburg South Africa
| | - Ajay K. Mishra
- College of Pharmaceutical and Chemical Engineering Hebei University of Science and Technology Shijiazhuang China
- Academy of Nanotechnology and Wastewater Innovations Johannesburg South Africa
- Department of Chemistry Durban University of Technology Durban South Africa
| | - Edward N. Nxumalo
- Institute for Nanotechnology and Water Sustainability, College of Science, Engineering and Technology University of South Africa Johannesburg South Africa
| | - Shivani B. Mishra
- College of Pharmaceutical and Chemical Engineering Hebei University of Science and Technology Shijiazhuang China
- Academy of Nanotechnology and Wastewater Innovations Johannesburg South Africa
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4
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Synthesis of blue emissive fluorescent nitrogen doped carbon dots from Annona squamosa fruit extract and their diverse applications in the field of catalysis and bio-imaging. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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5
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Lu J, Li F, Miao G, Miao X, Ren G, Wang B, Song Y, Li X, Zhu X. Superhydrophilic/superoleophobic shell powder coating as a versatile platform for both oil/water and oil/oil separation. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2021.119624] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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6
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Othmani A, Kesraoui A, Seffen M. Removal of phenol from aqueous solution by coupling alternating current with biosorption. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:46488-46503. [PMID: 32648221 DOI: 10.1007/s11356-020-09976-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 07/01/2020] [Indexed: 06/11/2023]
Abstract
The present research was devoted to water decontamination through the valorization of cellulosic fibers for the preparation of performing biosorbent, with high pollutant-uptake capacity and low cost. Luffa cylindrica (L.C) and zinc oxide were chosen for the synthesis of hybrid materials by precipitation with and without alternating current (AC). AC was used as a new alternative able to accelerate the reaction kinetics and to enhance the biosorption speed. The potential to remove phenol, from aqueous solution by coupling biosorption and AC, was highlighted. Pure L.C and hybrid materials (L.C + 4% Zn2+) synthesized with and without AC were chosen for the biosorption tests. The effects of pH, initial concentration, frequency, and contact time were studied. The efficiency of the coupling process was evaluated according to the quality of the treated water before and after purification. Results have shown that the percentages of chemical oxygen demand (COD), total organic carbon (TOC), germination indexes, and phenol removals have increased when adopting the coupling process. The maximal uptakes of phenol reached 15.4, 28.07, and 28.9 mg g-1 for a concentration of 30 mg L-1 of phenol, respectively, for raw L.C, L.C + 4% Zn2+ + AC, and L.C + 4% Zn2+ at pH = 2. Quantitative and qualitative characterizations confirmed the efficiency of the synthesized hybrid materials compared with pure L.C. The fractal model of Brouers Sotolongo was chosen for the description of the random distribution of the active sites. The kinetic and isotherm data showed a good correlation with the experimental results.
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Affiliation(s)
- Amina Othmani
- Laboratory of Energy and Materials (LabEM): LR11ES34, Higher School of Science and Technology of Hammam Sousse, University of Sousse, Sousse, Tunisia.
- Faculty of Sciences of Monastir, Monastir University, Monastir, Tunisia.
| | - Aida Kesraoui
- Laboratory of Energy and Materials (LabEM): LR11ES34, Higher School of Science and Technology of Hammam Sousse, University of Sousse, Sousse, Tunisia
| | - Mongi Seffen
- Laboratory of Energy and Materials (LabEM): LR11ES34, Higher School of Science and Technology of Hammam Sousse, University of Sousse, Sousse, Tunisia
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Abualnaja KM, Alprol AE, Abu-Saied MA, Mansour AT, Ashour M. Studying the Adsorptive Behavior of Poly(Acrylonitrile- co-Styrene) and Carbon Nanotubes (Nanocomposites) Impregnated with Adsorbent Materials towards Methyl Orange Dye. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:1144. [PMID: 33924975 PMCID: PMC8146385 DOI: 10.3390/nano11051144] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 04/17/2021] [Accepted: 04/26/2021] [Indexed: 02/03/2023]
Abstract
In this study, a polymeric (acrylonitrile-co-styrene) P(AN-co-St) composite was impregnated with adsorbents, such as sulfonated and multiwall carbon nanotubes (MWCNTs), to increase the adsorptive characteristics of the nanocomposite upon the removal of methyl orange (MO) dye under different conditions. A novel nanocomposite copolymer mixture of P(AN-co-St) and SP(AN-co-St) was used. MWCNTs were prepared by a low-cost chemical vapor deposition (CVD) process. Variation in MO adsorption onto the three nanocomposites was examined in an aqueous solution via the batch technique with respect to contact time, initial MO concentration, adsorbent dosage, pH, and temperature. The surface of the nanocomposites was characterized by a scanning electron microscope (SEM), particle size distribution (PSD), Fourier transform infrared (FTIR), and Raman analysis. The experimental data showed that the efficiency of P(AN-co-St)/ MWCNT removal increased under the conditions of an acidic pH (3 and 5) with an agitation speed of 140 rpm, a sorbent weight of 0.01 g, and 20 mg of initial dye. The maximum sorption capacities were 121.95, 48.78, and 47.84 mg g-1 for the P(AN-co-St)/ MWCNTs, SP(AN-co-St), and P(AN-co-St) composites, respectively, as assessed by the Langmuir model. Additional isotherm models, such as the Freundlich, Temkin, and Halsey models, were used to examine the experimental data. A pseudo-second-order model was found to be more fitting for describing the sorption.
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Affiliation(s)
- Khamael M. Abualnaja
- Department of Chemistry, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia;
| | - Ahmed E. Alprol
- National Institute of Oceanography and Fisheries, NIOF, Cairo 11516, Egypt;
| | - M. A. Abu-Saied
- Polymeric Materials Research Department, Advanced Technology and New Materials Research Institute, City of Scientific Research and Technological Applications (SRTA-CITY), New Borg El-Arab City 21934, Egypt;
| | - Abdallah Tageldein Mansour
- Animal and Fish Production Department, College of Agricultural and Food Sciences, King Faisal University, P.O. Box 420, Al-Ahsa 31982, Saudi Arabia
- Fish and Animal Production Department, Faculty of Agriculture (Saba Basha), Alexandria University, Alexandria 21531, Egypt
| | - Mohamed Ashour
- National Institute of Oceanography and Fisheries, NIOF, Cairo 11516, Egypt;
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8
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Kumar G, Masram DT. Sustainable Synthesis of MOF-5@GO Nanocomposites for Efficient Removal of Rhodamine B from Water. ACS OMEGA 2021; 6:9587-9599. [PMID: 33869939 PMCID: PMC8047673 DOI: 10.1021/acsomega.1c00143] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Accepted: 03/17/2021] [Indexed: 05/08/2023]
Abstract
Herein, a metal-organic framework (MOF-5) is synthesized by a solvothermal process and graphene oxide (GO) is prepared from the improved Hummer's method. The synthesis of MOF-5@GO nanocomposites is one-pot process via a grinding method and employed for the removal of Rhodamine B (RhB) dye. The removal efficiency of RhB is found to be 60.64% (151.62 mg·g-1) at 500 ppm. About 98.88% of RhB is removed within 5 min of contact time and increased up to 99.68% up to 10 min. The removal rate of MOF-5@GO nanocomposites is much better than that of pristine MOF-5. Equilibrium adsorption capacity is determined by a series of different experimental conditions such as pH, time, and concentration of dye solution. Although the results also showed that dye removal on MOF-5@GO nanocomposites is well described by the Langmuir isotherm (R 2 = 0.9703), the adsorption kinetics data reveals pseudo-second-order (R 2 = 0.9908). The synthesized nanocomposite is efficient for removal of dye, cost-effective, and reusable. Additionally, stability and self-degradation studies of pure RhB are reported in aqueous solution for up to 120 days at different pH values (pH 1-12).
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Affiliation(s)
- Gyanendra Kumar
- Department of Chemistry, University of Delhi, Delhi 110007, India
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9
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Dönmez Ö, Dükkancı M, Gündüz G. Effects of catalyst preparation method and reaction parameters on the ultrasound assisted Photocatalytic oxidation of reactive yellow 84 dye. JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE & ENGINEERING 2020; 18:835-851. [PMID: 33312606 PMCID: PMC7721927 DOI: 10.1007/s40201-020-00507-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Accepted: 06/22/2020] [Indexed: 06/12/2023]
Abstract
In this study, the Heterogeneous Sono-photocatalytic Process was used to degrade Reactive Yellow 84 (RY 84) dye dissolved in water over iron containing TiO2 and TiO2-Ce catalysts. The catalysts were prepared by sol-gel and incipient wetness impregnation methods and characterized using XRD, SEM, Nitrogen adsorption, UV-Vis DRS and ICP-AES measurements. The TiO2 catalyst containing 1% (in weight) iron, prepared by incipient wetness impregnation technique and calcined at 300 °C (1%Fe/TiO2-300 °C (IW)) was found to be the most effective catalyst. Parametric study was carried out over this catalyst and COD removal of 55% and TOC removal of 38% were achieved while the decolorization efficiency reached 100% after 45 min of reaction at the optimum conditions of, (25 mg/L of RY 84 solution, 0.5 g/L of catalyst, 5 mM of H2O2, a temperature of 25 °C, pH = 6 and US at a power of 40 W). Decolorization of RY 84 obeyed the first order kinetics with an activation energy of 20.7 kJ/mol. Sonication increased the decolorization efficiency of the heterogeneous Fenton process (UV + Catalyst+H2O2) from 92.7% to 97.5% after 30 min of reaction, with the COD and TOC reductions increasing from 87% to 90% and 48% to 57% after 120 min of reaction, respectively. US also decreased the toxicity of the RY 84 dye. The results obtained from this study show that, iron containing TiO2 and TiO2-Ce catalysts could be efficiently used in the hybrid process of ultrasound assisted heterogeneous photocatalytic oxidation in a wide range of experimental conditions.
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Affiliation(s)
- Özge Dönmez
- Ege University, Chemical Engineering Department, 35100 Bornova, İzmir, Turkey
| | - Meral Dükkancı
- Ege University, Chemical Engineering Department, 35100 Bornova, İzmir, Turkey
| | - Gönül Gündüz
- Ege University, Chemical Engineering Department, 35100 Bornova, İzmir, Turkey
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10
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Pirsaheb M, Hossaini H, Azizi N, Khosravi T. Synthesized Cr/TiO 2 immobilized on pumice powder for photochemical degradation of acid orange-7 dye under UV/visible light: influential operating factors, optimization, and modeling. JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE & ENGINEERING 2020; 18:1329-1341. [PMID: 33312645 PMCID: PMC7721946 DOI: 10.1007/s40201-020-00550-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Accepted: 09/22/2020] [Indexed: 06/12/2023]
Abstract
The current study aimed to investigate the removal efficiency of acid orange-7 (AO7) using synthesized Cr/TiO2 immobilized on pumice powder under visible light and UV irradiation. The characterization of synthesized nanocatalyst examined by scanning electron microscope, X-ray diffraction, and Fourier transforms infrared. The optimum of experimental parameters including catalyst dosage, dye concentration, time and pH, D-optimal Design (DOD) along with response surface methodology obtained by R software. The initial and outlet concentration was measured using a spectrophotometer. Besides, Analysis of variance results for the quadratic model showed simple linear regression with high significance and provided as a predicting model. The differences less than 0.2 between multiple and adjusted R2 in two models indicate that two examined models fitted suitably. The highest removal efficiency of AO7 was 95 and 74% under visible and UV irradiation, respectively. Therefore, the higher removal efficiency in visible light reduces the costs and energy, moreover, offers an environmentally friendly method. The results showed that the removal efficiency of AO7 increased considerably with rising catalyst dosage and time, as well as minimizing dye concentration, and pH.
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Affiliation(s)
- Meghdad Pirsaheb
- Department of Environmental Health Engineering, Faculty of Health, Kermanshah University of Medical Sciences, Kermanshah, Iran
- Research Center for Environmental Determinants of Health (RCEDH), Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Hiwa Hossaini
- Department of Environmental Health Engineering, Faculty of Health, Kermanshah University of Medical Sciences, Kermanshah, Iran
- Research Center for Environmental Determinants of Health (RCEDH), Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Nahid Azizi
- Students Research Committee, Kermanshah University of Medical Sciences, Kermanshah, Iran
- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Toba Khosravi
- Research Center for Environmental Determinants of Health (RCEDH), Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
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Mu'azu ND, Jarrah N, Zubair M, Manzar MS, Kazeem TS, Qureshi A, Haladu SA, Blaisi NI, Essa MH, Al-Harthi MA. Mechanistic aspects of magnetic MgAlNi barium-ferrite nanocomposites enhanced adsorptive removal of an anionic dye from aqueous phase. JOURNAL OF SAUDI CHEMICAL SOCIETY 2020. [DOI: 10.1016/j.jscs.2020.08.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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12
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Meghlaoui FZ, Merouani S, Hamdaoui O, Alghyamah A, Bouhelassa M, Ashokkumar M. Fe(III)‐catalyzed degradation of persistent textile dyes by chlorine at slightly acidic conditions: the crucial role of Cl
2
●−
radical in the degradation process and impacts of mineral and organic competitors. ASIA-PAC J CHEM ENG 2020. [DOI: 10.1002/apj.2553] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Affiliation(s)
- Fatima Zohra Meghlaoui
- Laboratory of Environmental Process Engineering, Faculty of Process Engineering University Salah Boubnider—Constantine 3 Constantine Algeria
| | - Slimane Merouani
- Laboratory of Environmental Process Engineering, Faculty of Process Engineering University Salah Boubnider—Constantine 3 Constantine Algeria
| | - Oualid Hamdaoui
- Chemical Engineering Department College of Engineering, King Saud University Riyadh Saudi Arabia
| | - Abdulaziz Alghyamah
- Chemical Engineering Department College of Engineering, King Saud University Riyadh Saudi Arabia
| | - Mohammed Bouhelassa
- Laboratory of Environmental Process Engineering, Faculty of Process Engineering University Salah Boubnider—Constantine 3 Constantine Algeria
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Karoui S, Ben Arfi R, Mougin K, Ghorbal A, Assadi AA, Amrane A. Synthesis of novel biocomposite powder for simultaneous removal of hazardous ciprofloxacin and methylene blue: Central composite design, kinetic and isotherm studies using Brouers-Sotolongo family models. JOURNAL OF HAZARDOUS MATERIALS 2020; 387:121675. [PMID: 31767503 DOI: 10.1016/j.jhazmat.2019.121675] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2019] [Revised: 10/20/2019] [Accepted: 11/11/2019] [Indexed: 05/27/2023]
Abstract
Over the past decades, extensive efforts have been made to use biomass-based-materials for wastewater-treatment. The first purpose of this study was to develop and characterize regenerated-reed/reed-charcoal (RR-ChR), an enhanced biosorbent from Tunisian-reed (Phragmites-australis). The second aim was to assess and optimize the RR-ChR use for the removal of binary ciprofloxacin antibiotic (CIP) and methylene blue dye (MB), using Central Composite Design under Response Surface methodology. The third purpose was to explain the mechanisms involved in the biosorption-process. The study revealed that the highest removal-percentages (76.66 % for the CIP and 100 % for the MB) were obtained under optimum conditions: 1.55 g/L of adsorbent, 35 mg/L of CIP, 75 mg/L of MB, a pH of 10.42 and 115.28 min contact time. It showed that the CIP biosorption mechanism was described by Brouers-Sotolongo-fractal model, with regression-coefficient (R2) of 0.9994 and a Person's Chi-square (X2) of 0.01. The Hill kinetic model better described the MB biosorption (R2 = 1 and X2 = 1.0E-4). The isotherm studies showed that the adsorbent surface was heterogeneous and the best nonlinear-fit was obtained with the Jovanovich (R2 = 0.9711), and Brouers-Sotolongo (R2 = 0.9723) models, for the CIP and MB adsorption, respectively. Finally, the RR-ChR lignocellulosic-biocomposite-powder could be adopted as efficient and cost-effective adsorbent.
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Affiliation(s)
- Sarra Karoui
- Research Laboratory LR18ES33, National Engineering School of Gabes, University of Gabes, Tunisia; National Engineering School of Sfax, University of Sfax, Tunisia; Univ Rennes, École Nationale Supérieure de Chimie de Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France.
| | - Rim Ben Arfi
- Research Laboratory LR18ES33, National Engineering School of Gabes, University of Gabes, Tunisia
| | - Karine Mougin
- Institute of Materials Science of Mulhouse, CNRS - UMR 7361, University of Haute-Alsace, France
| | - Achraf Ghorbal
- Research Laboratory LR18ES33, National Engineering School of Gabes, University of Gabes, Tunisia; Higher Institute of Applied Sciences and Technology of Gabes, University of Gabes, Tunisia
| | - Aymen Amine Assadi
- Univ Rennes, École Nationale Supérieure de Chimie de Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France
| | - Abdeltif Amrane
- Univ Rennes, École Nationale Supérieure de Chimie de Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France
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14
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Ghanbarian M, Mahvi AH, Ghanbarian M. Data on bioassay of toxicity reduction of treated textile wastewater by using nanophotocatalytic process by Daphnia magna. Data Brief 2018; 21:1321-1324. [PMID: 30456251 PMCID: PMC6231081 DOI: 10.1016/j.dib.2018.10.143] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 10/22/2018] [Accepted: 10/26/2018] [Indexed: 12/07/2022] Open
Abstract
Practicability and possibility of photocatalytic degradation of Ro16 textile dye and the actual wastewater of textile were studied on pilot scale. The amount of reduction in solution toxicity was studied and assessed by the application of a bioassay using Daphnia magna. The solution toxicity at the beginning of the process has an increasing procedure and this is caused by the intermediate products that are produced during the photocatalytic process from the mother compounds, and are more toxic compared to them, and their toxicity declines at the end of the process with the completion of mineralization. The procedure of toxicity increase and its decrease in the course of photocatalytic process has a direct relation with the amount of mineralization.
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Affiliation(s)
- Marjan Ghanbarian
- School of Public Health, Shahroud University of Medical Sciences, Shahroud, Iran
| | - A H Mahvi
- Center for Solid Waste Research, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran
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15
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Boubakri S, Djebbi MA, Bouaziz Z, Namour P, Jaffrezic-Renault N, Amara ABH, Trabelsi-Ayadi M, Ghorbel-Abid I, Kalfat R. Removal of two anionic reactive textile dyes by adsorption into MgAl-layered double hydroxide in aqueous solutions. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:23817-23832. [PMID: 29876856 DOI: 10.1007/s11356-018-2391-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 05/23/2018] [Indexed: 06/08/2023]
Abstract
Textile dyes pose a significant challenge for water pollution due to the poor degradability of their complex aromatic structures (e.g., RR-120 and RBB-150). In order to minimize the harmful effects of RR-120 and RBB-150, the capacity of MgAl-layered double hydroxide for removing of these contaminants was studied herein. Batch adsorption experiments were conducted to investigate the effect of various operating parameters, such as solution pH, contact time, dye concentration, and temperature in order to provide optimal conditions for removal. Structural and morphological analyses were used to highlight the assembly and/or interaction LDH-dye. The state of equilibrium of RR-120 and RBB-150 adsorption was pH- and temperature-dependent and followed the pseudo-second-order rate model. Also, the equilibrium adsorption data of both dyes were found to adopt the Langmuir type isotherm model, which assumes a monolayer arrangement in LDH-dye. Furthermore, the effects of four major coexisting and competing mono- and divalent interlayer anions, such as NO3-, Cl-, CO32-, and SO42-, on the uptakes of RR-120 and RBB-150 were studied and the results showed that NO3- anions had insignificant effect on the uptakes of RR-120 and RBB-150 by MgAl. An equivalent study on the presence of both dyes in competitive trial adsorption/desorption from binary aqueous solution was investigated. And finally, the reuse operation of recovered material after dye adsorption was tested in up to 5 cycles of recyclability.
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Affiliation(s)
- Saber Boubakri
- Laboratoire des Applications de la Chimie aux Ressources et Substances Naturelles et à l'Environnement, Université de Carthage, Faculté des Sciences de Bizerte, 7021, Zarzouna, Tunisia
- Laboratoire Matériaux, Traitement et Analyse, BiotechPole Sidi-Thabet, Institut National de Recherche et d'Analyse Physico-chimique, 2020, Ariana, Tunisia
| | - Mohamed Amine Djebbi
- Laboratoire de Physique des Matériaux Lamellaires et Nanomatériaux Hybrides, Université de Carthage, Faculté des Sciences de Bizerte, 7021, Zarzouna, Tunisia.
- Institut des Sciences Analytiques UMR CNRS 5280, Université de Lyon, 5 rue de la Doua, 69100, Villeurbanne, France.
- UR RiverLy, Centre de Lyon-Villeurbanne, Irstea, 5 rue de la Doua CS 20244, 69625, Villeurbanne, France.
| | - Zaineb Bouaziz
- Laboratoire de Physique des Matériaux Lamellaires et Nanomatériaux Hybrides, Université de Carthage, Faculté des Sciences de Bizerte, 7021, Zarzouna, Tunisia
- Institut Européen des Membranes, UMR5635 UM ENSM CNRS, Place Eugène Bataillon, 34095, Montpellier cedex 5, France
| | - Philippe Namour
- UR RiverLy, Centre de Lyon-Villeurbanne, Irstea, 5 rue de la Doua CS 20244, 69625, Villeurbanne, France
| | - Nicole Jaffrezic-Renault
- Institut des Sciences Analytiques UMR CNRS 5280, Université de Lyon, 5 rue de la Doua, 69100, Villeurbanne, France
| | - Abdesslem Ben Haj Amara
- Laboratoire de Physique des Matériaux Lamellaires et Nanomatériaux Hybrides, Université de Carthage, Faculté des Sciences de Bizerte, 7021, Zarzouna, Tunisia
| | - Malika Trabelsi-Ayadi
- Laboratoire des Applications de la Chimie aux Ressources et Substances Naturelles et à l'Environnement, Université de Carthage, Faculté des Sciences de Bizerte, 7021, Zarzouna, Tunisia
| | - Ibtissem Ghorbel-Abid
- Laboratoire Matériaux, Traitement et Analyse, BiotechPole Sidi-Thabet, Institut National de Recherche et d'Analyse Physico-chimique, 2020, Ariana, Tunisia
| | - Rafik Kalfat
- Laboratoire Matériaux, Traitement et Analyse, BiotechPole Sidi-Thabet, Institut National de Recherche et d'Analyse Physico-chimique, 2020, Ariana, Tunisia
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Molla Mahmoudi M, Nadali A, Soheil Arezoomand HR, Mahvi AH. Adsorption of cationic dye textile wastewater using Clinoptilolite: isotherm and kinetic study. JOURNAL OF THE TEXTILE INSTITUTE 2018. [DOI: 10.1080/00405000.2018.1465329] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Affiliation(s)
- Mohammad Molla Mahmoudi
- Department of Environmental Health Engineering, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Azam Nadali
- Department of Environmental Health Engineering, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Hamid Reza Soheil Arezoomand
- Department of Environmental Health Engineering, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Amir Hossein Mahvi
- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
- Center for Solid Waste Research, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran
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Adsorptive Removal of Benzene and Toluene from Aqueous Environments by Cupric Oxide Nanoparticles: Kinetics and Isotherm Studies. J CHEM-NY 2017. [DOI: 10.1155/2017/2069519] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Removal of benzene and toluene, as the major pollutants of water resources, has attracted researchers’ attention, given the risk they pose to human health. In the present study, the potential of copper oxide nanoparticles (CuO-NPs) in eliminating benzene and toluene from a mixed aqueous solution was evaluated. For this, we performed batch experiments to investigate the effect of solution pH (3–13), dose of CuO-NPs (0.1–0.8 g), contact time (5–120 min), and concentration of benzene and toluene (10–200 mg/l) on sorption efficiency. The maximum removal was observed at neutral pH. By using the Langmuir model, we measured the highest adsorption capacity to be 100.24 mg/g for benzene and 111.31 mg/g for toluene. Under optimal conditions, adsorption efficiency was 98.7% and 92.5% for benzene and toluene, respectively. The sorption data by CuO-NPs well fitted into the following models: Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich model. The experimental information well fitted in the Freundlich for benzene and Langmuir for toluene. Based on the results, adsorption followed pseudo-second-order kinetics with acceptable coefficients. The findings introduced CuO-NPs as efficient compounds in pollutants adsorption. In fact, they could be used to develop a simple and efficient pollutant removal method from aqueous solutions.
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Ibrahim RK, Hayyan M, AlSaadi MA, Hayyan A, Ibrahim S. Environmental application of nanotechnology: air, soil, and water. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:13754-88. [PMID: 27074929 DOI: 10.1007/s11356-016-6457-z] [Citation(s) in RCA: 109] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Accepted: 03/09/2016] [Indexed: 05/17/2023]
Abstract
Global deterioration of water, soil, and atmosphere by the release of toxic chemicals from the ongoing anthropogenic activities is becoming a serious problem throughout the world. This poses numerous issues relevant to ecosystem and human health that intensify the application challenges of conventional treatment technologies. Therefore, this review sheds the light on the recent progresses in nanotechnology and its vital role to encompass the imperative demand to monitor and treat the emerging hazardous wastes with lower cost, less energy, as well as higher efficiency. Essentially, the key aspects of this account are to briefly outline the advantages of nanotechnology over conventional treatment technologies and to relevantly highlight the treatment applications of some nanomaterials (e.g., carbon-based nanoparticles, antibacterial nanoparticles, and metal oxide nanoparticles) in the following environments: (1) air (treatment of greenhouse gases, volatile organic compounds, and bioaerosols via adsorption, photocatalytic degradation, thermal decomposition, and air filtration processes), (2) soil (application of nanomaterials as amendment agents for phytoremediation processes and utilization of stabilizers to enhance their performance), and (3) water (removal of organic pollutants, heavy metals, pathogens through adsorption, membrane processes, photocatalysis, and disinfection processes).
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Affiliation(s)
- Rusul Khaleel Ibrahim
- Department of Civil Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Maan Hayyan
- Department of Civil Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia.
- University of Malaya Centre for Ionic Liquids (UMCiL), University of Malaya, 50603, Kuala Lumpur, Malaysia.
| | - Mohammed Abdulhakim AlSaadi
- University of Malaya Centre for Ionic Liquids (UMCiL), University of Malaya, 50603, Kuala Lumpur, Malaysia
- Nanotechnology & Catalysis Research Centre (NANOCAT), University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Adeeb Hayyan
- University of Malaya Centre for Ionic Liquids (UMCiL), University of Malaya, 50603, Kuala Lumpur, Malaysia
- Department of Chemical Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Shaliza Ibrahim
- Department of Civil Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia
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Kamani H, Nasseri S, Khoobi M, Nabizadeh Nodehi R, Mahvi AH. Sonocatalytic degradation of humic acid by N-doped TiO2 nano-particle in aqueous solution. JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE AND ENGINEERING 2016; 14:3. [PMID: 26819709 PMCID: PMC4729171 DOI: 10.1186/s40201-016-0242-2] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Accepted: 01/10/2016] [Indexed: 12/07/2022]
Abstract
Background Un-doped and N-doped TiO2 nano-particles with different nitrogen contents were successfully synthesized by a simple sol–gel method, and were characterized by X-ray diffraction, field emission scanning electron microscopy, Energy dispersive X-ray analysis and UV–visible diffuse reflectance spectra techniques. Then enhancement of sonocatalytic degradation of humic acid by un-doped and N-doped TiO2 nano-particles in aqueous environment was investigated. The effects of various parameters such as initial concentration of humic acid, N-doping, and the degradation kinetics were investigated. Results The results of characterization techniques affirmed that the synthesis of un-doped and N-doped TiO2 nano-particles was successful. Degradation of humic acid by using different nano-particles obeyed the first-order kinetic. Among various nano-particles, N-doped TiO2 with molar doping ratio of 6 % and band gap of 2.92 eV, exhibited the highest sonocatalytic degradation with an apparent-first-order rate constant of 1.56 × 10-2 min−1. Conclusions The high degradation rate was associated with the lower band gap energy and well-formed anatase phase. The addition of nano-catalysts could enhance the degradation efficiency of humic acid as well as N-doped TiO2 with a molar ratio of 6 %N/Ti was found the best nano-catalyst among the investigated catalysts. The sonocatalytic degradation with nitrogen doped semiconductors could be a suitable oxidation process for removal of refractory pollutants such as humic acid from aqueous solution. Electronic supplementary material The online version of this article (doi:10.1186/s40201-016-0242-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Hossein Kamani
- Department of Environmental Health Engineering, School of Public Health, 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
| | - Mehdi Khoobi
- Department of Medicinal Chemistry, Faculty of Pharmacy and Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Ramin Nabizadeh Nodehi
- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Amir Hossein Mahvi
- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran ; Center for Solid Waste Research, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran ; National Institute of Health Research, Tehran University of Medical Sciences, Tehran, Iran
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20
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Darsana R, Chandrasehar G, Deepa V, Gowthami Y, Chitrikha T, Ayyappan S, Goparaju A. Acute Toxicity Assessment of Reactive Red 120 to Certain Aquatic Organisms. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2015; 95:582-587. [PMID: 26350898 DOI: 10.1007/s00128-015-1636-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2014] [Accepted: 08/18/2015] [Indexed: 06/05/2023]
Abstract
Laboratory experiments were conducted to evaluate the acute toxicity of a widely used textile dye namely Reactive Red 120 (RR 120) on certain aquatic species such as Pseudokirchneriella subcapitata (green alga), Lemna gibba (duck weed), Daphnia magna (water flea) and Oncorhynchus mykiss (Rainbow trout). All experiments were performed as per the OECD Guidelines for Testing of Chemicals. The toxicity end points of EC50, LC50, NOEC and LOEC for RR 120 were determined with 95% confidence limits using TOX STAT version 3.5. The EC50 of RR 120 for green alga, duck weed and water flea are >100.00, 64.34, 10.40 mg L(-1), respectively and LC50 for Rainbow trout is 78.84 mg L(-1). Based on the results, the test item RR 120 could be classified as non-toxic to green alga, harmful to duck weed and Rainbow trout, toxic to water flea.
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Affiliation(s)
- R Darsana
- Department of Biotechnology, International Institute of Biotechnology and Toxicology (IIBAT), Padappai, Kancheepuram District, Tamil Nadu, 601 301, India.
| | - G Chandrasehar
- Department of Biotechnology, International Institute of Biotechnology and Toxicology (IIBAT), Padappai, Kancheepuram District, Tamil Nadu, 601 301, India
| | - V Deepa
- Department of Toxicology, Vanta Bioscience, Gummidipundi, Tamil Nadu, 601201, India
| | - Y Gowthami
- Department of Biotechnology, International Institute of Biotechnology and Toxicology (IIBAT), Padappai, Kancheepuram District, Tamil Nadu, 601 301, India
| | - T Chitrikha
- Department of Biotechnology, International Institute of Biotechnology and Toxicology (IIBAT), Padappai, Kancheepuram District, Tamil Nadu, 601 301, India
| | - S Ayyappan
- Department of Biotechnology, International Institute of Biotechnology and Toxicology (IIBAT), Padappai, Kancheepuram District, Tamil Nadu, 601 301, India
| | - A Goparaju
- Department of Biotechnology, International Institute of Biotechnology and Toxicology (IIBAT), Padappai, Kancheepuram District, Tamil Nadu, 601 301, India
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Moeinpour F, Alimoradi A, Kazemi M. Efficient removal of Eriochrome black-T from aqueous solution using NiFe2O4 magnetic nanoparticles. JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE & ENGINEERING 2014; 12:112. [PMID: 25247075 PMCID: PMC4160557 DOI: 10.1186/s40201-014-0112-8] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2013] [Accepted: 07/27/2014] [Indexed: 05/24/2023]
Abstract
The magnetic NiFe2O4 nanoparticles have been synthesized and used as adsorbents for removal of an azo dye, Eriochrome black-T (EBT) from aqueous solution. The NiFe2O4 nanoparticles were characterized by scanning electron microscope (SEM), Transmission electron microscope (TEM), X-ray diffraction (XRD) and Fourier transform infrared spectra (FTIR). The adsorption studies were carried out under various parameters, such as pH, adsorbent dosage, contact time and initial dye concentration. The experimental results show that the percentage of adsorption increases with an increase in the adsorbent dosage. The maximum adsorption occurred at the pH value of 6.0. The equilibrium uptake was increased with an increase in the initial dye concentration in solution. Adsorption kinetic data were properly fitted with the pseudo-second-order kinetic model. The experimental isotherms data were analyzed using Langmuir and Freundlich isotherm equations. The best fit was obtained by the Langmuir model with high correlation coefficients (R(2) = 0.9733) with a maximum monolayer adsorption capacity of 47.0 m g/g.
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Affiliation(s)
- Farid Moeinpour
- />Department of Chemistry, College of Science, Bandar Abbas Branch, Islamic Azad University, Bandar Abbas, Iran
| | - Asma Alimoradi
- />Department of Chemistry, College of Science, Kerman Branch, Islamic Azad University, Kerman, Iran
| | - Maryam Kazemi
- />Department of Chemistry, College of Science, Kerman Branch, Islamic Azad University, Kerman, Iran
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Shaibu SE, Adekola FA, Adegoke HI, Ayanda OS. A Comparative Study of the Adsorption of Methylene Blue onto Synthesized Nanoscale Zero-Valent Iron-Bamboo and Manganese-Bamboo Composites. MATERIALS 2014; 7:4493-4507. [PMID: 28788688 PMCID: PMC5455915 DOI: 10.3390/ma7064493] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Revised: 05/13/2014] [Accepted: 05/23/2014] [Indexed: 12/07/2022]
Abstract
In this study, bamboo impregnated with nanoscale zero-valent iron (nZVI) and nanoscale manganese (nMn) were prepared by the aqueous phase borohydride reduction method and characterized using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and PIXE analysis. The synthesized nMn-bamboo and nZVI-bamboo composites were subsequently applied to the sorption of methylene blue (MB) dye from aqueous solution. The adsorption of MB dye was investigated under various experimental conditions such as pH, contact time, initial concentration of MB dye and adsorbent dosage. The results showed that the synthesized nZVI-bamboo composite was more effective than nMn-bamboo composite in terms of higher MB dye adsorption capacity of 322.5 mg/g compared to 263.5 mg/g of nMn-bamboo composite. At a concentration of 140 mg/L MB dye, 0.02 g of nZVI-bamboo and nMn-bamboo composites resulted in 79.6% and 78.3% removal, respectively, at 165 rpm, contact time of 120 min and at a solution pH of 7.6. The equilibrium data was best represented by Freundlich isotherm model and the pseudo-second order kinetic model better explained the kinetic data for both nZVI-bamboo and nMn-bamboo composites.
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Affiliation(s)
- Solomon E Shaibu
- Department of Chemistry, University of Ilorin, P.M.B 1515, Ilorin 240222, Nigeria.
| | - Folahan A Adekola
- Department of Chemistry, University of Ilorin, P.M.B 1515, Ilorin 240222, Nigeria.
| | - Halimat I Adegoke
- Department of Chemistry, University of Ilorin, P.M.B 1515, Ilorin 240222, Nigeria.
| | - Olushola S Ayanda
- Environmental and Nano Science Research Group, Department of Chemistry, University of the Western Cape, Private Bag X17, Bellville 7535, South Africa.
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Abstract
Arsenic is a naturally occurring metalloid, which is widely distributed in nature and is regarded as the largest mass poisoning in history. In the present study, the adsorption potential ofSalvadora persica(S. persica) stem ash in a batch system for the removal of As(V) from aqueous solutions was investigated. Isotherm studies were carried out to evaluate the effect of contact time (20–240 min), pH (2–11), initial arsenic concentration (50–500 μg/L), and adsorbent dose on sorption efficiency. Maximum removal efficiency of 98.33% and 99.32% was obtained at pH 6, adsorbent dosage 3.5 g/L, initial As(V) concentration 500 μg/L, and contact time 80 and 60 min forS. persicastem ash at 300 °C and 500 °C, respectively. Also, the adsorption equilibriums were analyzed by the Langmuir and Freundlich isotherm models. Such equilibriums showed that the adsorption data was well fitted with the Freundlich isotherm model forS. persicastem ash at both 300 °C and 500 °C (R2=0.8983and 0.9274, resp.). According to achieved results, it was defined thatS. persicastem ash can be used effectively for As(V) removal from the aqueous environment.
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