Calcium ion incorporated hydrous iron(III) oxide: synthesis, characterization, and property exploitation towards water remediation from arsenite and fluoride
IR@CMERI: CSIR- Central Mechanical Engineering Research Institute (CMERI), Durgapur
View Archive Info| Field | Value | |
| Title |
Calcium ion incorporated hydrous iron(III) oxide: synthesis, characterization, and property exploitation towards water remediation from arsenite and fluoride
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| Creator |
Ghosh, Abir
Paul, Suparna Bhattacharya, Sayan Sasikumar, Palani Biswas, Krishna Ghosh, Uday Chand |
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| Subject |
Chemistry
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| Description |
Calcium ion-incorporated hydrous iron(III) oxide (CIHIO) samples have been prepared aiming investigation of efficiency
enhancement on arsenic and fluoride adsorption of hydrous iron(III) oxide (HIO). Characterization of the optimized product
with various analytical tools confirms that CIHIO is microcrystalline and mesoporous (pore width, 26.97 Å; pore diameter,
27.742 Å with pore volume 0.18 cm3 g−1
) material. Increase of the BET surface area (> 60%) of CIHIO (269.61 m2 g−1
) relative
to HIO (165.6 m2 g−1
) is noticeable. CIHIO particles are estimated to be ~ 50 nm from AFM and TEM analyses. Although the pH
optimized for arsenite and fluoride adsorptions are different, the efficiencies of CIHIO towards their adsorption are very good at
pH 6.5 (pHzpc). The adsorption kinetics and equilibrium data of either tested species agree well, respectively, with pseudo-second
order model and Langmuir monolayer adsorption phenomenon. Langmuir capacities (mg g−1
at 303 K) estimated are 29.07 and
25.57, respectively, for arsenite and fluoride. The spontaneity of adsorption reactions (ΔG0 = − 18.02 to − 20.12 kJ mol−1 for
arsenite; − 0.2523 to − 3.352 kJ mol−1 for fluoride) are the consequence of entropy parameter. The phosphate ion (1 mM)
compared to others influenced adversely the arsenite and/or fluoride adsorption reactions. CIHIO (2.0 g L−1
) is capable to abstract
arsenite or fluoride above 90% from their solution (0 to 5.0 mg L−1
). Mechanism assessment revealed that the adsorption of
arsenite occurs via chelation, while of fluoride occurs with ion-exchange.
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| Publisher |
Springer
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| Date |
2019
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| Type |
Article
PeerReviewed |
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| Identifier |
Ghosh, Abir and Paul, Suparna and Bhattacharya, Sayan and Sasikumar, Palani and Biswas, Krishna and Ghosh, Uday Chand (2019) Calcium ion incorporated hydrous iron(III) oxide: synthesis, characterization, and property exploitation towards water remediation from arsenite and fluoride. Environmental Science and Pollution Research, 26. pp. 4618-4632.
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| Relation |
http://cmeri.csircentral.net/700/
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