Removal of direct red and acid brilliant blue by adsorption on to banana pith

Namasivayam, C.; Prabha, D.; Kumutha, M.

doi:10.1016/s0960-8524(97)86722-3

Cited by 322 publications

(143 citation statements)

References 11 publications

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“…Therefore, ion removal was difficult, which corroborates the results of pseudo-second order model and the values of the E) obtained by the mathematical model of Dubinin-Radushkevich. Namasivayam 43 determined that low rates of desorption suggest a chemisorption process as the primary mode of pollutant removal by the adsorbent. Therefore, the percentage desorbed cannot be considered satisfactory for a possible reuse of this biosorbent for new adsorption processes.…”

Section: Desorptionmentioning

confidence: 99%

Biosorption and removal of chromium from water by using moringa seed cake (Moringa oleifera Lam.)

et al. 2013

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Recebido em 14/11/12; aceito em 13/5/13; publicado na web em 17/7/13 This study evaluated the adsorption capacity of chromium from contaminated aqueous solutions by using Moringa oleifera Lam. seeds. Parameters such as solution pH, adsorbent mass, contact time between solution and adsorbent, isotherms, thermodynamic, kinetics, and desorption were evaluated. The maximum adsorption capacity (Q m ) calculated to be 3.191 mg g −1 for the biosorbent. Activated carbon was used for comparison purposes in addition to the biosorbent. The best fit was obtained by the Langmuir model for both adsorbents. The average desorption value indicated that both the biosorbent and activated carbon have a strong interaction with the metal. The results showed that the biosorbent has advantages owing to its low cost and efficiency in Cr 3+ removal from contaminated waters.

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Section: Desorptionmentioning

confidence: 99%

Biosorption and removal of chromium from water by using moringa seed cake (Moringa oleifera Lam.)

et al. 2013

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“…It can be seen from the figure that the percentage removal initially increases very sharply with the increase in adsorbent dosage, but beyond a value of 25 g/L, the percentage removal reaches an almost constant value. This may be due to an overlapping of adsorption sites as a result of over-crowding of adsorbent particles (Namasivayam et al, 1998). The percentage removal of Pb 2+ increased from 68.4 to 92.4%, 65.8 to 91.1% and 63.1 to 89.6% for the three different initial concentrations of 100, 300 and 500 mg/L, respectively, with an increase in the adsorbent doses from 5 g/l to 35 g/l at room temperature (25 o C) and pH 5.5.…”

Section: Effect Of Adsorbent Dosementioning

confidence: 99%

Kinetics and equilibrium studies of Pb2+ in removal from aqueous solutions by use of nano-silversol-coated activated carbon

Kumar¹,

Vincent²,

Kirthika³

et al. 2010

Braz. J. Chem. Eng.

141

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-The ability of nano-silversol-coated activated carbon (NSSCAC) to adsorb Pb 2+ from aqueous solution has been investigated through batch experiments. The adsorption of lead onto NSSCAC has been found to depend on adsorbent dose, initial concentration and contact time. The experiments were carried out at natural solution pH. Equilibrium data fitted well with the Langmuir model and Freundlich model with a maximum adsorption capacity of 23.81 mg of Pb/g of NSSCAC. The experiments showed that the highest removal rate was 92.42% for Pb 2+ under optimal conditions. The sorption of Pb 2+ on NSSCAC was rapid during the first 30 min and the equilibrium attained within 60 min. The kinetic processes of Pb 2+ adsorption on NSSCAC were described by applying pseudo-first-order and pseudo-second-order kinetic models. The kinetic data for the adsorption process obeyed a pseudo-second-order kinetic model, suggesting that the adsorption process is chemisorption. The NSSCAC investigated in this study showed good potential for the removal of Pb 2+ from aqueous solution.

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“…Over the years, a number of workers have used different waste materials. They have studied the feasibility of using low cost materials, such as waste orange peel [6] , banana pith [7] , cotton waste, rice husk [8] , betonite clay [9] , neem leaf powder, [10] powdered activated sludge, perlite [11] , bamboo dust, coconut shell, groundnut shell, rice husk and straw, duck weed [12] , sewage sludge [13] , sawdust carbon [14] and gram husk [15] , coal bottom ash [16][17][18] , bagasse fly ash [19] , blast furnace slag [20] , deoiled soya [21,22] , red mud [23] and sawdust [24] as adsorbents for removal of various dyes from wastewaters.…”

Section: Introductionmentioning

confidence: 99%

Antimicrobial Activity of Some Medicinal Plants from Malaysia

Philip¹,

Malek²,

Sani³

et al. 2009

American J. of Applied Sciences

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Problem statement: It is well documented that lead is one of contaminants of industrial wastewaters and its pollution exists in the wastewater of many industries. As a result, recent research has focused on the development of cost effective alternatives using various natural sources and industrial wastes. In this setting, the use of low-cost agricultural materials, waste and residues for recovering heavy metals from contaminated industrial effluent has emerged as a potential alternative method to high cost adsorbents. In the present study, adsorption of lead(II) ions onto Orange Peel (OP), a typical agricultural byproduct, was investigated systematically with the variation in the parameters of pH, sorbent dosage, contact time and the initial concentration of adsorbate. Langmuir and Freundlich isotherms were used to analyze the equilibrium data. Kinetic and thermodynamic parameters were also calculated to describe the adsorption mechanism. Approach: The Orange Peel (OP) was obtained from a local market in the south of Jordan. The orange peel was cut into small pieces using scissors. Then OP was dried at 100°C for 24 h using hot air oven. Qualitative analyses of the main functional groups involved in metal adsorption were performed using a Fourier transformed infrared spectrometer (Perkin-Elmer FTIR 1605, ¨Uberlingen, Germany). Biosorption experiments were carried out in a thermostatic shaker at 180 rpm and at an ambient temperature (20±2°C) using 250 mL shaking flasks containing 100 mL of different concentrations and initial pH values of Pb(II) solutions, prepared from reagent grade salt Pb(NO 3 ) 2 (Merck). The initial pH values of the solutions were previously adjusted with 0.1 M HNO 3 or NaOH and measured using a hand held pH meters (315i/SET). The sorbent (0.2-1.0 g) was added to each flask and then the flasks were sealed up to prevent change of volume of the solution during the experiments. After shaking the flasks for predetermined time intervals, the samples were withdrawn from the flasks and filtered through a Whatman filter paper. The filtrate was analyzed by AAS (Perkin Elmer Analyst 300). Results: Four kinetic models are the pseudo-first-order, pseudo-second-order, Elovich and intraparticle diffusion equations, were selected to interpret the adsorption data. Kinetic parameters such as the rate constants, equilibrium adsorption capacities and related correlation coefficients, for each kinetic model were calculated and discussed. The linear Langmuir and Freundlich models were applied to describe equilibrium isotherms and both models fitted well. The monolayer adsorption capacity was found as 21.1 mg g −1 at pH 6 and 20°C.The dimensionless separation factor (R L ) has shown that orange peel can be used for removal of Pb(II) from aqueous solutions. The nagative free energy of adsorption indicated that the adsorption of lead (II) ions onto orange peel was feasible and spontaneous. Conclusion: The sorption capacity of the orange peel is comparable to the other available adsorbents and it is quite c...

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Removal of direct red and acid brilliant blue by adsorption on to banana pith

Cited by 322 publications

References 11 publications

Biosorption and removal of chromium from water by using moringa seed cake (Moringa oleifera Lam.)

Biosorption and removal of chromium from water by using moringa seed cake (Moringa oleifera Lam.)

Kinetics and equilibrium studies of Pb2+ in removal from aqueous solutions by use of nano-silversol-coated activated carbon

Antimicrobial Activity of Some Medicinal Plants from Malaysia

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