Adsorption of Ni(II) ions by magnetic activated carbon/chitosan beads prepared from spent coffee grounds, shrimp shells and green tea extract

Magnetic activated carbon/chitosan composite (MACCS) beads from spent coffee grounds and shrimp shells were synthesized using green tea extract as a crosslinker. The adsorbent was then applied for removal of Ni(II) ions from aqueous solution after carefully characterizing it by various techniques (X...

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Veröffentlicht in:Environmental technology. - 1993. - 41(2020), 21 vom: 02. Sept., Seite 2817-2832
1. Verfasser: Le, Van Thuan (VerfasserIn)
Weitere Verfasser: Dao, My Uyen, Le, Hoang Sinh, Tran, Dai Lam, Doan, Van Dat, Nguyen, Hoai Thuong
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2020
Zugriff auf das übergeordnete Werk:Environmental technology
Schlagworte:Journal Article Activated carbon Ni(II) removal adsorption chitosan magnetic adsorbent Coffee Ions Plant Extracts Tea mehr... Water Pollutants, Chemical Charcoal 16291-96-6 Chitosan 9012-76-4
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520 |a Magnetic activated carbon/chitosan composite (MACCS) beads from spent coffee grounds and shrimp shells were synthesized using green tea extract as a crosslinker. The adsorbent was then applied for removal of Ni(II) ions from aqueous solution after carefully characterizing it by various techniques (XRD, FTIR, FE-SEM, EDX, VSM and BET). The adsorption kinetics, isotherms, thermodynamics, the effects of key adsorption factors such as the pH value, initial Ni(II) concentration, contact time, adsorbent dose and temperature were investigated in detail. A possible adsorption mechanism was proposed. The results indicated that the adsorption process was thermodynamically favourable, spontaneous, endothermic, and was best described by the Langmuir isotherm and pseudo-second-order kinetic models. The MACCS beads with an optimum CS to MAC weight ratio estimated as 60:40 gave the maximum monolayer adsorption capacity for Ni(II) ions of 108.70 mg g-1 at 25°C, pH of 6, adsorbent dose of 1.0g L-1 and a contact time of 6 h. The recycling study confirmed that the adsorption ability of MACCS beads towards Ni(II) ions maintained well after five consecutive cycles with the removal efficiency greater than 86.25%. Eventually, the MACCS beads could be used as an environmentally-friendly and highly efficient adsorbent for removal of Ni(II) ions from wastewater due to the advantages of high efficiency, rapid separation and good reusability 
650 4 |a Journal Article 
650 4 |a Activated carbon 
650 4 |a Ni(II) removal 
650 4 |a adsorption 
650 4 |a chitosan 
650 4 |a magnetic adsorbent 
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650 7 |a Ions  |2 NLM 
650 7 |a Plant Extracts  |2 NLM 
650 7 |a Tea  |2 NLM 
650 7 |a Water Pollutants, Chemical  |2 NLM 
650 7 |a Charcoal  |2 NLM 
650 7 |a 16291-96-6  |2 NLM 
650 7 |a Chitosan  |2 NLM 
650 7 |a 9012-76-4  |2 NLM 
700 1 |a Dao, My Uyen  |e verfasserin  |4 aut 
700 1 |a Le, Hoang Sinh  |e verfasserin  |4 aut 
700 1 |a Tran, Dai Lam  |e verfasserin  |4 aut 
700 1 |a Doan, Van Dat  |e verfasserin  |4 aut 
700 1 |a Nguyen, Hoai Thuong  |e verfasserin  |4 aut 
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