Arsenite and arsenate ions adsorption onto a biogenic nano-iron entrapped dual network Fe@alginate-κ-carrageenan hydrogel beads

Arsenite and arsenate ions adsorption onto a biogenic nano-iron entrapped dual network Fe@alginate-κ-carrageenan hydrogel beads

Sorptive removal is seen as a viable option to remove dissolved ions from an aqueous solution. The study reports the use of leaf extract of Ocimum sanctum L. (Tulsi) for nano-size iron preparation. Prepared particles were entrapment into calcium alginate- κ-carrageenan beads acting as adsorbents for...

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Bibliographic Details
Published in:Nanotechnology for environmental engineering Vol. 8; no. 1; pp. 269 - 279
Main Authors: Srivastava, Anushree, Azad, Shivesh Kumar, Singh, Kavita, Prasad, Bablu, Kumari, Madhu, Nandan, Sahoo, Amresh Kumar, Dave, Hemen, Maurya, Deepak M., Singh, Deepak, Prasad, Kumar Suranjit
Format: Journal Article
Language:English
Published: Cham Springer International Publishing 01-03-2023
Springer Nature B.V
Subjects:
Adsorbents
Adsorption
Alginic acid
Aqueous solutions
Arsenates
Arsenic
Arsenic ions
Arsenite
Beads
Calcium
Calcium alginate
Carrageenan
Carrageenans
Chemisorption
Earth and Environmental Science
Earth Sciences
Entrapment
Environment
Environmental Science and Engineering
Hydrogels
Ions
Iron
Materials selection
Nanotechnology and Microengineering
Original Paper
Plant extracts
Sorption
FT-IR
Alginate
Carrageenan
Adsorption
Arsenate
Arsenite
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Summary:Sorptive removal is seen as a viable option to remove dissolved ions from an aqueous solution. The study reports the use of leaf extract of Ocimum sanctum L. (Tulsi) for nano-size iron preparation. Prepared particles were entrapment into calcium alginate- κ-carrageenan beads acting as adsorbents for arsenic ions. Further, characterization of iron particles and beads was performed using UV–Vis, TEM, SAED, SEM-EDAX, and FT-IR, respectively. The data obtained from the batch sorption study revealed that iron entrapped calcium alginate-κ-carrageenan beads removal efficiency for arsenite and arsenate ions was 88.25% and 95.75%, respectively at pH 3.0. The maximum adsorption was achieved for 25 min of contact time at adsorbent concentration 2 g L −1 . The maximum sorption capacity, q m obtained by Langmuir isotherm was found to be 37.63 mg g −1 for arsenate and 35.49 mg g −1 for arsenite ions, respectively. Thermodynamic studies suggested that the chemisorption process was accountable for the removal of analyte ions. As iron, alginate, and carrageenan are none toxic to human health, thus beads could be seen as a promising candidate material for the removal of dissolved arsenic ions from an aqueous solution. Graphical abstract
ISSN:2365-6379
2365-6387
DOI:10.1007/s41204-022-00280-y