Gautham Kurup, Neeraj Krishnan, Vaishnav M. R., Roopak A. R., K. Nithya, Asha Sathish, Selvaraju Sivamani, Aswathy S. Cheruvally
{"title":"MgFe2O4 生物炭纳米复合材料在单一和二元金属离子体系中去除铬和镍离子的竞争性吸附研究","authors":"Gautham Kurup, Neeraj Krishnan, Vaishnav M. R., Roopak A. R., K. Nithya, Asha Sathish, Selvaraju Sivamani, Aswathy S. Cheruvally","doi":"10.1007/s10450-024-00523-1","DOIUrl":null,"url":null,"abstract":"<div><p>The presence of heavy metal ions in water bodies constitutes a significant environmental hazard. The development of sustainable and cost-effective adsorbent materials for their removal is an urgent priority. In alignment with this critical objective, the present study explores the potential of a novel composite material for water remediation. This composite, fabricated from biochar and magnesium ferrite nanoparticles, targets the removal of hexavalent chromium and divalent nickel. While prior research has explored the application of rice husk as an adsorbent, no investigation, to our knowledge, has examined the potential of magnesium ferrite-rice husk composites for this purpose. Initial screening identified the biochar-magnesium ferrite composite (pre-calcination) as the most effective adsorbent. This composite displayed a superior surface area (151 m²/g) compared to calcined magnesium ferrite (91 m²/g) and achieved exceptional removal efficiencies for both chromium (50 mg/g) and nickel (54 mg/g). Optimal chromium removal occurred at pH 1 with a 110-minute contact time, while nickel favored a pH of 6 and the same contact time. The adsorption process was characterized as physisorption and endothermic. Notably, the composite exhibited efficient regeneration (82% for nickel and 90% for chromium) using simple acid/base solutions. The BJH analysis of pore characteristics indicated an average pore diameter of 1.5365 nm and a total pore volume of 0.17 cm³/g. 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This composite displayed a superior surface area (151 m²/g) compared to calcined magnesium ferrite (91 m²/g) and achieved exceptional removal efficiencies for both chromium (50 mg/g) and nickel (54 mg/g). Optimal chromium removal occurred at pH 1 with a 110-minute contact time, while nickel favored a pH of 6 and the same contact time. The adsorption process was characterized as physisorption and endothermic. Notably, the composite exhibited efficient regeneration (82% for nickel and 90% for chromium) using simple acid/base solutions. The BJH analysis of pore characteristics indicated an average pore diameter of 1.5365 nm and a total pore volume of 0.17 cm³/g. 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Competitive Adsorption Studies of MgFe2O4-Biochar Nanocomposites for the Removal of Chromium and Nickel Ions in Single and Binary Metal Ion System
The presence of heavy metal ions in water bodies constitutes a significant environmental hazard. The development of sustainable and cost-effective adsorbent materials for their removal is an urgent priority. In alignment with this critical objective, the present study explores the potential of a novel composite material for water remediation. This composite, fabricated from biochar and magnesium ferrite nanoparticles, targets the removal of hexavalent chromium and divalent nickel. While prior research has explored the application of rice husk as an adsorbent, no investigation, to our knowledge, has examined the potential of magnesium ferrite-rice husk composites for this purpose. Initial screening identified the biochar-magnesium ferrite composite (pre-calcination) as the most effective adsorbent. This composite displayed a superior surface area (151 m²/g) compared to calcined magnesium ferrite (91 m²/g) and achieved exceptional removal efficiencies for both chromium (50 mg/g) and nickel (54 mg/g). Optimal chromium removal occurred at pH 1 with a 110-minute contact time, while nickel favored a pH of 6 and the same contact time. The adsorption process was characterized as physisorption and endothermic. Notably, the composite exhibited efficient regeneration (82% for nickel and 90% for chromium) using simple acid/base solutions. The BJH analysis of pore characteristics indicated an average pore diameter of 1.5365 nm and a total pore volume of 0.17 cm³/g. The research findings demonstrate the composite’s effectiveness as a sustainable adsorbent for capturing heavy metal ions from water.
期刊介绍：
The journal Adsorption provides authoritative information on adsorption and allied fields to scientists, engineers, and technologists throughout the world. The information takes the form of peer-reviewed articles, R&D notes, topical review papers, tutorial papers, book reviews, meeting announcements, and news.
Coverage includes fundamental and practical aspects of adsorption: mathematics, thermodynamics, chemistry, and physics, as well as processes, applications, models engineering, and equipment design.
Among the topics are Adsorbents: new materials, new synthesis techniques, characterization of structure and properties, and applications; Equilibria: novel theories or semi-empirical models, experimental data, and new measurement methods; Kinetics: new models, experimental data, and measurement methods. Processes: chemical, biochemical, environmental, and other applications, purification or bulk separation, fixed bed or moving bed systems, simulations, experiments, and design procedures.
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