Biosorption of lead and copper from aqueous solutions by pre-treated crab and arca shell biomass

Dahiya, Sudhir; Tripathi, R.M.; Hegde, A. G.

doi:10.1016/j.biortech.2006.11.011

Cited by 109 publications

(55 citation statements)

References 15 publications

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“…It was used the linearised equation of Langmuir. [17][18][19] (3) Q m is the Langmuir constant (L g -1 ) that gives the theoretical adsorption capacity in the monolayer, and K L (L mg -1 ) is a constant related with the adsorption energy. The plot of C e /Q e against C e gives a straight line with interception equals to 1/(K L Q m ) and slope as 1/Q m .…”

Section: Adsorption Equilibriummentioning

confidence: 99%

“…17,18,20 The Freundlich model assumes adsorption in multilayer. 21 Freundlich equation is given by: 22 (5) K F and 1/n are the Freundlich constants of the system, which are associated with the adsorption capacity and the adsorption intensity, respectively.…”

Section: Adsorption Equilibriummentioning

confidence: 99%

“…Amount of iron ion adsorbed per biosorbent mass unit, Qe, was calculated by the expression: 8,17 (1)…”

Section: Adsorption Capacitymentioning

confidence: 99%

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Fe (ii) adsorption on Ucides Cordatus crab shells

Porpino¹,

Barreto²,

Cambuim³

et al. 2011

Quím. Nova

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Recebido em 13/5/10; aceito em 12/1/11; publicado na web em 29/3/11In this study Ucides cordatus crab shells were utilized as Fe (II) sorbent as material of low cost and simple preparation. Values of pH of standard solution, biosorbent mass, particles size, contact time (t c ) and initial concentration of the standard solution were optimized. The best conditions were pH = 2.00, t c = 840 min and M c = 0.25 g. The kinetic pseudo first-order model displayed the best description of the adsorption process and the equilibrium study showed that the Langmuir model better describes the adsorption of the Fe (II). There is great affinity between the Fe (II) and the biosorbent.

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Section: Adsorption Equilibriummentioning

confidence: 99%

Section: Adsorption Equilibriummentioning

confidence: 99%

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Fe (ii) adsorption on Ucides Cordatus crab shells

Porpino¹,

Barreto²,

Cambuim³

et al. 2011

Quím. Nova

View full text Add to dashboard Cite

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“…and Leite, 2000;Silva et al, 2003;Loukidio et al, 2004;Halttunen et al, 2007;Kim et al, 2007;Nasir et al, 2007;Deng et al, 2007;Dahiya et al, 2008;Tunali et al, 2009).…”

Section: Brazilian Journal Of Chemical Engineeringunclassified

Removal of corper(II) Ions from aqueous solution by a lactic acid bacterium

Yılmaz

Tay

Kıvanç

et al. 2010

Braz. J. Chem. Eng.

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-Enterococcus faecium, a lactic acid bacterium (LAB), was evaluated for its ability to remove copper(II) ions from water. The effects of the pH, contact time, initial concentration of copper(II) ions, and temperature on the biosorption rate and capacity were studied. The initial concentrations of copper(II) ions used to determine the maximum amount of biosorbed copper(II) ions onto lyophilised lactic acid bacterium varied from 25 mg L -1 to 500 mg L -1 . Maximum biosorption capacities were attained at pH 5.0 and 6.0. Temperature variation between 20°C and 40°C did not affect the biosorption capacity of the bacterial biomass. The highest copper(II) ion removal capacity was 106.4 mg per g dry biomass. The correlation regression coefficients show that the biosorption process can be well defined by the Freundlich equation. The change in biosorption capacity with time was found to fit a pseudo-second-order equation.

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“…The q m values for Cu 2+ and Pb 2+ ions at 60°C were 0.0891 mmol/g (5.66 mg/g) and 0.1127 mmol/g (23.35 mg/g), respectively. As comparison, the maximum sorption capacities of several biomass-based sorbents for sequestering copper and lead ions from water and wastewater are listed in Table 3 [32][33][34][35][36][37][38][39]. With respect to R L values, all systems exhibit favorable biosorption nature.…”

Section: Modeling Of Adsorption Isotherms 341 Single Component Systemmentioning

confidence: 99%