Lead(II) Adsorption onto Sulphuric Acid Treated Cashew Nut Shell

Kumar, P. Senthil; Ramalingam, Subramanian; Abhinaya, R. V.; Thiruvengadaravi, K.V.; Baskaralingam, P.; Sivanesan, S.

doi:10.1080/01496395.2011.590174

Cited by 76 publications

(24 citation statements)

References 27 publications

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“…Activated carbon is a commonly used adsorbent for the removal of Pb(II) ions from aqueous solution. In spite of the abundant uses of activated carbon, its applications are sometimes restricted due to its high cost and also due to loss during its regeneration . Therefore, the researchers are on the search for new low‐cost alternative adsorbents for the water pollution control, particularly, where cost plays an important role.…”

Section: Introductionmentioning

confidence: 99%

“…Most of the time, the adsorption capacities of such adsorbents are not large, and hence the study and exploration of more and more new adsorbents are still under progress. Some of the low‐cost adsorbents studied for the treatment of Pb(II) ions are sago waste, hazel nut shell, oak stem, Olive pomace , rice husk ash, tree fern, Botrytis cinerea , Cicer arientinum , papaya wood, grape stalk waste, modified orange peel, Oryza sativa L. Husk, Waste maize bran, coir, Spirogyra neglecta , tea waste, Caulerpa lentillifera , fraximus tree leaves, lignin, nopal, ulmus tree leaves, rice husk ash, bael leaves, corncobs, Moringa olifera bark, sulphuric acid treated cashew nut shell, etc. The main objectives of the present study is to evaluate the potential of the surface modified Strychnos potatorum seeds (SMSP) as a low‐cost adsorbent for removal of Pb(II) ions from aqueous solution and also to study the adsorption mechanism of Pb(II) ions onto the SMSP.…”

Section: Introductionmentioning

confidence: 99%

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Adsorption isotherms, kinetics and mechanism of Pb(II) ions removal from aqueous solution using chemically modified agricultural waste

Kumar¹,

Senthamarai

Deepthi³

et al. 2013

Can J Chem Eng

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The removal of Pb(II) ions from aqueous solution by chemically surface modified Strychnos potatorum seeds (SMSP) was investigated. The surface modification of the adsorbent was confirmed by the FTIR and SEM analyses. The Freundlich adsorption isotherm model provides a better fit to the adsorption isotherm data. The maximum adsorption capacity of SMSP for Pb(II) ions was found to be 166.67 mg/g at optimum conditions of pH 5.0, contact time of 30 min, SMSP dosage of 2 g/L and temperature of 30 • C. The adsorption kinetics for Pb(II) ions removal by the SMSP follows the pseudo-second order kinetic model. Adsorption mechanism of Pb(II) ions onto the SMSP was explained with the intraparticle diffusion, Boyd kinetic and Shrinking core models (SCM). The effective diffusivity values were calculated from the Boyd kinetic model: 7.723 × 10 −12 , 8.464 × 10 −12 , 6.877 × 10 −12 , 8.358 × 10 −12 and 6.983 × 10 −12 m 2 /s for the initial Pb(II) ions concentration from 100 to 500 mg/L, respectively. The diffusivity values were estimated from the SCM: 8.901 × 10 −9 , 8.586 × 10 −9 , 8.359 × 10 −9 , 5.368 × 10 −9 and 4.318 × 10 −9 m 2 /s for the initial Pb(II) ions concentration from 100 to 500 mg/L, respectively. The results suggest that SMSP can be used as an effective low-cost adsorbent for the Pb(II) ions removal.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Adsorption isotherms, kinetics and mechanism of Pb(II) ions removal from aqueous solution using chemically modified agricultural waste

Kumar¹,

Senthamarai

Deepthi³

et al. 2013

Can J Chem Eng

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“…Adsorption data were further analyzed using usually employed isotherm models (30) in order to understand the nature of adsorption of Pb(II) on to the HA-CTPP beads. The simplest adsorption model is the Langmiur isotherm in which it is assumed that the adsorbate form a monolayer on the adsorbent surface and the adsorption energy decreases as the distance from the surface increase, making multilayer adsorption process less favorable.…”

Section: Effect Of Pb(ii) Ion Concentration and Adsorption Isothermmentioning

confidence: 99%

Adsorption of Pb(II) Ions Using Humic Acid Coated Chitosan-Tripolyphosphate (HA-CTPP) Beads

Sureshkumar¹,

Das²,

George³

et al. 2013

Separation Science and Technology

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A new humic acid (HA) based adsorbent was prepared by coating humic acid on chitosan tripolyphosphate (CTPP) beads. Humic acid-chitosan tripolyphosphate (HA-CTPP) beads thus obtained were characterized using Fourier Transform Infrared Spectroscopy and Scanning Electron Microscopy. Swelling capacity studies of CTPP and HA-CTPP beads conducted in the pH range, pH ¼ 1-10 showed that HA-CTPP beads are more stable against swelling than CTPP beads. Equilibration of HA-CTPP beads in water for different pH showed that leaching of HA from the beads is negligible and the beads are stable for adsorption applications. Adsorption of Pb(II) ions onto HA-CTPP beads were studied as a function of various operational parameters such as initial pH, metal ion concentration, and contact time. The results showed that HA-CTPP beads are suitable for Pb(II) ions adsorption and the kinetics of sorption very well fit into pseudo-second order model. The Langmuir model was found to be more suitable for explaining the observed adsorption data, giving a theoretical maximum adsorption capacity of 223.7 mg/g. HA-CTPP beads could possibly find application in the treatment of waste water contaminated with other toxic and/or heavy metals.

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“…The main disadvantage of the ion exchange process for the treatment of Cr(VI) ions containing wastewater is due to the high cost of the resin materials. Among these techniques, the adsorption process was shown to be an economic, efficient and simple operation [14][15][16][17][18][19][20][21][22][23][24]. Activated carbon adsorption has been proven to be the most widely and effective adsorbents for the removal of heavy metals from the water/wastewater.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of toxic Cr(VI) ions from aqueous solution by sulphuric acid modifiedStrychnos potatorumseeds in batch and column studies

Anbalagan

Kumar²,

Karthikeyan³

2015

Desalination and Water Treatment

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Lead(II) Adsorption onto Sulphuric Acid Treated Cashew Nut Shell

Cited by 76 publications

References 27 publications

Adsorption isotherms, kinetics and mechanism of Pb(II) ions removal from aqueous solution using chemically modified agricultural waste

Adsorption isotherms, kinetics and mechanism of Pb(II) ions removal from aqueous solution using chemically modified agricultural waste

Adsorption of Pb(II) Ions Using Humic Acid Coated Chitosan-Tripolyphosphate (HA-CTPP) Beads

Adsorption of toxic Cr(VI) ions from aqueous solution by sulphuric acid modifiedStrychnos potatorumseeds in batch and column studies

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