Biosorption of hexavalent chromium using tamarind (Tamarindus indica) fruit shell-a comparative study

Popuri, Srinivasa R.; Jammala, Ajithapriya; Reddy, Kachireddy Venkata Naga Suresh; Krishnaiah, A.

doi:10.2225/vol10-issue3-fulltext-11

Cited by 51 publications

(43 citation statements)

References 26 publications

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“…3b. The Cr(VI) percent removal increases with the increase in dosage because of availability of ample unoccupied sites (Rao et al 2007;Tailor et al 2012). It lasts until ACLL reached equilibrium by Cr(VI), and thereafter uptake attains constant value.…”

Section: Effect Of Acll Dosementioning

confidence: 99%

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Adsorption of hexavalent chromium onto activated carbon derived from Leucaena leucocephala waste sawdust: kinetics, equilibrium and thermodynamics

Malwade

Lataye

Mhaisalkar

et al. 2016

Int. J. Environ. Sci. Technol.

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The adsorptive removal of Cr(VI) was studied using activated carbon derived from Leucaena leucocephala (ACLL). The physico-chemical properties of ACLL were determined using proximate analysis and N 2 BET surface area analysis. The N 2 BET surface area of ACLL was determined to be 1131 m 2 g -1 . The point of zero charge (pH pzc ) of 5.42 indicated that ACLL surface was positively charged for pH below the pH PZC , attracting anions. The effect of experimental operating parameters such as time of contact, ACLL dose, pH, initial concentration and temperature was investigated. The optimum values of parameters such as concentration of 100 mg L -1 , 300 mg of ACLL dose, time of contact of 60 min, pH of 4 indicated the maximum Cr(VI) uptake of 13.85 mg g -1 . The pseudo-second-order kinetic model best fitted with the Cr(VI) adsorption data. Adsorptive removal of Cr(VI) onto ACLL satisfactorily fitted in the order of Redlich-Peterson [ Freundlich [ Langmuir [ Temkin adsorption isotherm model. The thermodynamic parameters showed the adsorption of Cr(VI) onto ACLL was an endothermic and spontaneously occurred process.

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Section: Effect Of Acll Dosementioning

confidence: 99%

“…Some of the commonly used methods for removal of Cr(VI) are chemical reduction, precipitation, reverse osmosis, ion exchange and electro-coagulation (Rao et al 2007;Deng et al 2009). These Cr(VI) removal methods result into the formation of toxic sludge that requires further disposal.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of hexavalent chromium onto activated carbon derived from Leucaena leucocephala waste sawdust: kinetics, equilibrium and thermodynamics

Malwade

Lataye

Mhaisalkar

et al. 2016

Int. J. Environ. Sci. Technol.

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“…This was due to the dominant species ( and ) of Cr ions in solution expected to interact more strongly with the ligands carrying positive charges [21]. These results are like for tamarind shell [13], but the most of authors report an optimum pH of 2.0 like Tamarind shell [22], eucalyptus bark [16], bagassa and sugarcane pulp, coconut fibers and wool, [23], for the tamarind shell treated with oxalic acid [24], at pH of 2.0 and 5.0 for the mandarin bagassa [25], and almond green hull [26]. 2 4 CrO  2 2 7 Cr O …”

Section: Determination Of Hexavalent Trivalent and Total Crmentioning

confidence: 85%

Hexavalent Chromium Removal by Citrus limonium Shell

Vargas-Morales¹,

Bautista-Mata²,

González³

et al. 2012

OJINM

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We studied the Chromium(VI) removal capacity in aqueous solution by the lemon shell, using the diphenylcarbazide method to evaluate the metal concentration. So, the highest biosorption of the metal (50 mg/L) occurs within 100 minutes, at pH of 1.0, and 28˚C. According to temperature, the highest removal was observed at 60˚C, in 11 minutes, when the metal (1 g/L) is completely adsorbed. At the analyzed concentrations of Cr(VI), lemon shell, showed excellent removal capacity, besides it removes efficiently the metal in situ (97.2% removal, 7 days of incubation, 5 g of biomass). After 1 hour of incubation the studied biomass reduces 1.0 g of Cr(VI) with the simultaneous production of Cr(III); so it can be used to eliminate it from industrial wastewater.

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“…The decrease in adsorption at high pH values may be due to the competitiveness of the oxyanion of chromium and OH -ions in the bulk. These results suggest that pH affects the solubility of metals and the ionization state of the functional groups like carboxylate, phosphate and amino groups of the cell walls of the biosorbent [34][35][36][37]. …”

Section: Batch Biosorption Experiments 321 Effect Of Ph On Cr (Vi) mentioning

confidence: 89%

Removal of chromium (VI) from aqueous solution using chemically modified orange (citrus cinensis) peel

Mandina¹

2013

IOSR-JAC

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of Cr (VI) ions increased with increase in contact time and remained constant after an equilibrium time of 180 min. The removal of Cr (VI) ions increased with increase in biosorbent concentration with the optimal adsorbent dosage at 4.0 mg/L. The increase in initial Cr (VI) ion concentration led to an increase in the percentage removal of Cr (VI). The adsorption data fitted well with the Freundlich isotherm model with

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Biosorption of hexavalent chromium using tamarind (Tamarindus indica) fruit shell-a comparative study

Cited by 51 publications

References 26 publications

Adsorption of hexavalent chromium onto activated carbon derived from Leucaena leucocephala waste sawdust: kinetics, equilibrium and thermodynamics

Adsorption of hexavalent chromium onto activated carbon derived from Leucaena leucocephala waste sawdust: kinetics, equilibrium and thermodynamics

Hexavalent Chromium Removal by Citrus limonium Shell

Removal of chromium (VI) from aqueous solution using chemically modified orange (citrus cinensis) peel

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