KINETICS AND ADSORPTION OF BENZOATE AND SALICYLATE AT THE NATURAL HEMATITE-WATER INTERFACE
IR@NEIST: CSIR-North East Institute of Science and Technology, Jorhat
View Archive Info| Field | Value | |
| Title |
KINETICS AND ADSORPTION OF BENZOATE AND SALICYLATE AT THE NATURAL HEMATITE-WATER INTERFACE
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| Creator |
DAS , M R
BORDOLOI , D BORTHAKUR , P C MAHIUDDIN , S |
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| Subject |
Material Science
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| Description |
Kinetics of adsorption of benzoate and salicylate onto the natural hematite surfaces have been carried out at pH 5 and at a fixed ionic
strength (I=1
×10−4moldm−3). The state of equilibrium was attained at 144 and 70h for benzoate and salicylate, respectively. Adsorption
behaviour of benzoate and salicylate onto the natural hematite was studied over a wide range of pH at a fixed I=5
×10−4moldm−3 NaCl
and at different temperatures. The adsorption isotherms for both the adsorbates were Langmuir type up to pH 8. TheΓmax for benzoate is
≈2.7–13.7 times more than that of salicylate depending on the pH of the suspension. Unlike benzoate, salicylate is not only adsorbed at one
surfacesitebutalsocoversaroundthreeormoresurfacesitesofhematitesurface.Therateconstantforadsorption,K1 forsalicylateontothe
natural hematite is greater than that of benzoate and increases with the increase in temperature and
≈4 times greater at a fixed temperature.
Theactivationenergyfortheadsorptionofsalicylateontothenaturalhematiteis2.9timesmorethanthatofbenzoateonthesameadsorbent
resulting in lowerΓmax.
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| Date |
2005
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://neist.csircentral.net/302/1/2159_COLLOIDS_SURFACES_A%2C254(1%2D3)%2Cp%2D49%2D55.pdf
DAS , M R and BORDOLOI , D and BORTHAKUR , P C and MAHIUDDIN , S (2005) KINETICS AND ADSORPTION OF BENZOATE AND SALICYLATE AT THE NATURAL HEMATITE-WATER INTERFACE. COLLOIDS AND SURFACES , 254 (1-3). pp. 49-55. |
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| Relation |
http://neist.csircentral.net/302/
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