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Nizeyimana JC, Ndagijimana P, Khan J, Xiangru L, Twagirayezu G, Manzi HP, Irumva O, Yu CP, Hu A, Lin S. A hybrid system for Nickel ions removal from synthesized wastewater using adsorption assisted with electrocoagulation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:28321-28340. [PMID: 38538998 DOI: 10.1007/s11356-024-33082-7] [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: 11/26/2023] [Accepted: 03/21/2024] [Indexed: 04/30/2024]
Abstract
The presence of heavy metal ions in water environments has raised significant concerns, necessitating practical solutions for their complete removal. In this study, a combination of adsorption and electrocoagulation (ADS + EC) techniques was introduced as an efficient approach for removing high concentrations of nickel ions (Ni2+) from aqueous solutions, employing low-cost sunflower seed shell biochar (SSSB). The combined techniques demonstrated superior removal efficiency compared to individual methods. The synthesized SSSB was characterized using SEM, FT-IR, XRD, N2-adsorption-desorption isotherms, XPS, and TEM. Batch processes were optimized by investigating pH, adsorbent dosage, initial nickel concentration, electrode effects, and current density. An aluminum (Al) electrode electrocoagulated particles and removed residual Ni2+ after adsorption. Kinetic and isotherm models examined Ni2+ adsorption and electrocoagulation coupling with SSSB-based adsorbent. The results indicated that the kinetic data fit well with a pseudo-second-order model, while the experimental equilibrium adsorption data conformed to a Langmuir isotherm under optimized conditions. The maximum adsorption capacity of the activated sunflower seed shell was determined to be 44.247 mg.g-1. The highest nickel ion removal efficiency of 99.98% was observed at initial pH values of 6.0 for ADS and 4.0 for ADS/EC; initial Ni2+ concentrations of 30.0 mg/L and 1.5 g/L of SSSB; initial current densities of 0.59 mA/cm2 and 1.32 kWh/m3 were also found to be optimal. The mechanisms involved in the removal of Ni2+ from wastewater were also examined in this research. These findings suggest that the adsorption-assisted electrocoagulation technique has a remarkable capacity for the cost-effective removal of heavy metals from various wastewater sources.
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Affiliation(s)
- Jean Claude Nizeyimana
- School of Environment Northeast, Normal University, Changchun, 130117, China
- CAS Key Laboratory of Urban Pollutant Conversion of Urban Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 136102, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | | | - Junaid Khan
- School of Environment Northeast, Normal University, Changchun, 130117, China
| | - Liu Xiangru
- School of Environment Northeast, Normal University, Changchun, 130117, China
| | - Gratien Twagirayezu
- University of Chinese Academy of Sciences, Beijing, 100049, China
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550002, Guizhou, China
| | - Habasi Patrick Manzi
- CAS Key Laboratory of Urban Pollutant Conversion of Urban Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 136102, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Olivier Irumva
- School of Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Chang-Ping Yu
- CAS Key Laboratory of Urban Pollutant Conversion of Urban Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 136102, China
| | - Anyi Hu
- CAS Key Laboratory of Urban Pollutant Conversion of Urban Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 136102, China
| | - Shanshan Lin
- School of Environment Northeast, Normal University, Changchun, 130117, China.
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Liao PL, Mahasti N, Effendi LW, Huang YH. Sulfide recovery using fluidized bed homogeneous crystallization technology to produce nickel sulfide from wastewater that contains sulfides. ENVIRONMENTAL RESEARCH 2023; 236:116782. [PMID: 37517497 DOI: 10.1016/j.envres.2023.116782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 07/20/2023] [Accepted: 07/27/2023] [Indexed: 08/01/2023]
Abstract
Sulfide-containing wastewater, characterized by its foul odor, corrosiveness, and toxicity, can endanger human health. Fluidized-bed homogeneous crystallization (FBHC) avoids the excessive sludge production commonly associated with conventional chemical precipitation methods. In this study, FBHC is used to treat sulfur-containing synthetic wastewater. Furthermore, nickel-containing wastewater was utilized as a precipitant in the system, hence the advantage of simultaneous sulfur and nickel removal from the wastewater. The operating parameters, including pH, a precipitant dosage of [Ni2+]0/[S2-]0, and cross-sectional surface loading (LS, kg/m2h) are optimized. The optimum operating conditions of pH 9.8 ± 0.3, [Ni2+]0/[S2-]0 = 0.8, and LS = 1.5 kg/m2h results in total sulfur removal (TR) of 95.7% and crystallization ratio (CR) of 94.8%. The effect of organic compounds (acetic acid, oxalic acid, EDTA, and citric acid) and inorganic ions (NO3-, CO32-, PO43-, F-, and Cl-) on the nickel sulfide granulation process was discussed.
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Affiliation(s)
- Po-Lin Liao
- Department of Chemical Engineering, National Cheng-Kung University, Tainan, 701, Taiwan
| | - Nicolaus Mahasti
- Department of Chemical Engineering, National Cheng-Kung University, Tainan, 701, Taiwan
| | | | - Yao-Hui Huang
- Department of Chemical Engineering, National Cheng-Kung University, Tainan, 701, Taiwan.
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Shetty S, Baig N, Wahed SA, Hassan A, Das N, Alameddine B. Iodine and Nickel Ions Adsorption by Conjugated Copolymers Bearing Repeating Units of Dicyclopentapyrenyl and Various Thiophene Derivatives. Polymers (Basel) 2023; 15:4153. [PMID: 37896396 PMCID: PMC10611155 DOI: 10.3390/polym15204153] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 10/15/2023] [Accepted: 10/17/2023] [Indexed: 10/29/2023] Open
Abstract
The synthesis of three conjugated copolymers TPP1-3 was carried out using a palladium-catalyzed [3+2] cycloaddition polymerization of 1,6-dibromopyrene with various dialkynyl thiophene derivatives 3a-c. The target copolymers were obtained in excellent yields and high purity, as confirmed by instrumental analyses. TPP1-3 were found to divulge a conspicuous iodine adsorption capacity up to 3900 mg g-1, whereas the adsorption mechanism studies revealed a pseudo-second-order kinetic model. Furthermore, recyclability tests of TPP3, the copolymer which revealed the maximum iodine uptake, disclosed its efficient regeneration even after numerous adsorption-desorption cycles. Interestingly, the target copolymers proved promising nickel ions capture efficiencies from water with a maximum equilibrium adsorption capacity (qe) of 48.5 mg g-1.
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Affiliation(s)
- Suchetha Shetty
- Department of Mathematics and Natural Sciences, Gulf University for Science and Technology, Mubarak Al-Abdullah 32093, Kuwait
- Functional Materials Group, Gulf University for Science and Technology, Mubarak Al-Abdullah 32093, Kuwait
| | - Noorullah Baig
- Department of Mathematics and Natural Sciences, Gulf University for Science and Technology, Mubarak Al-Abdullah 32093, Kuwait
- Functional Materials Group, Gulf University for Science and Technology, Mubarak Al-Abdullah 32093, Kuwait
| | - Sk Abdul Wahed
- Department of Chemistry, Indian Institute of Technology Patna, Patna 801106, Bihar, India (A.H.); (N.D.)
| | - Atikur Hassan
- Department of Chemistry, Indian Institute of Technology Patna, Patna 801106, Bihar, India (A.H.); (N.D.)
| | - Neeladri Das
- Department of Chemistry, Indian Institute of Technology Patna, Patna 801106, Bihar, India (A.H.); (N.D.)
| | - Bassam Alameddine
- Department of Mathematics and Natural Sciences, Gulf University for Science and Technology, Mubarak Al-Abdullah 32093, Kuwait
- Functional Materials Group, Gulf University for Science and Technology, Mubarak Al-Abdullah 32093, Kuwait
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Safwat SM, Mohamed NY, El-Seddik MM. Performance evaluation and life cycle assessment of electrocoagulation process for manganese removal from wastewater using titanium electrodes. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 328:116967. [PMID: 36493542 DOI: 10.1016/j.jenvman.2022.116967] [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: 09/27/2022] [Revised: 11/22/2022] [Accepted: 12/01/2022] [Indexed: 06/17/2023]
Abstract
Excess manganese (Mn) concentrations can pose environmental and health risks. Currently, research on Mn removal by electrocoagulation (EC) using transition metal electrodes and the determination of its potential environmental impacts is limited. This study aims to assess the electrocoagulation process's performance with a titanium electrode as a sacrificial anode while also performing a life cycle assessment (LCA) of the process. The initial pH, current density (CD), electrode spacings, electrolyte types, concentrations, and electrode arrangement were all examined. For synthetic wastewater, most of the experiments used a concentration of Mn of 2 mg/L and sodium chloride as a supporting electrolyte at a concentration of 1 g/L. LCA software (OpenLCA 1.11) was used to assess the potential environmental impacts. Optimal operating conditions within the experimental range were as follows: initial pH = 7, CD = 10 mA/cm2, gap distance = 2 cm, and 1 g/L NaCl. Under these conditions, the maximum Mn removal efficiency was 96.5% after 60 min. There was an improvement of 2% rise after 60 min when the temperature increased from 20 °C to 40 °C. For real wastewater, the highest removal efficiencies for Mn and chemical oxygen demand after 60 min were 91.3% and 92%, respectively. The pseudo second order model provides the highest coefficient of determination for expressing the experimental data. Global warming, human non-carcinogenic toxicity, and terrestrial ecotoxicity were the most important categories of impact examined in this work according to the LCA (0.00064 kg CO2 eq, 0.00018 kg 1,4-DCB, and 0.00028 kg 1,4-DCB, respectively). To effectively remove Mn using EC with Ti electrodes, it appears that a period of electrolysis of 10 min would be sufficient under most of the conditions investigated in this study. The reduction in the electrolysis time will lead to a reduction in the operating costs of the system.
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Affiliation(s)
- Safwat M Safwat
- Sanitary & Environmental Engineering Division, Public Works Department, Faculty of Engineering, Cairo University, Giza, 12316, Egypt.
| | | | - Mostafa M El-Seddik
- Sanitary and Environmental Engineering, Civil Engineering Department, Institute of Aviation Engineering & Technology, Giza, 12815, Egypt
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Removal of Ni(II) from Aqueous Solution by Novel Lycopersicon esculentum Peel and Brassica botrytis Leaves Adsorbents. SEPARATIONS 2023. [DOI: 10.3390/separations10020113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
The current work reports adsorption of Ni(II) using Brassica botrytis leaves (BBL), Brassica botrytis leaves-activated carbon (BBL-AC), Lycopersicon esculentum peel (LEP) and Lycopersicon esculentum peel-activated carbon (LEP-AC). The adsorption of Ni(II) was tested in batch experiments by varying different parameters such as pH, initial metal ion concentration, temperature, adsorbent dosage, and contact time. Thermodynamics and kinetics investigations were performed for Ni removal. The adsorption of Ni(II) was improved by incorporation of activated carbon to the parental Brassica botrytis leaves and Lycopersicon esculentum peel adsorbents. The studies revealed 40 min of equilibrium time for Ni(II) adsorption by different adsorbents. Adsorption of Ni was drastically declined by temperature with a minimum adsorption of 53% observed for BBL. Similarly, solution pH also played a vital role in Ni(II) adsorption by different adsorbents. A 95% adsorption of Ni was recorded in the case of LEP-AC at pH 7. The study concluded with the application of Lycopersicon esculentum peel and Brassica botrytis leaves as active adsorbents for Ni(II) adsorption from aqueous solution.
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