Removal of Pb(II) ions from aqueous solutions by sulphuric acid-treated wheat bran

Özer, Ayla

doi:10.1016/j.jhazmat.2006.07.040

Cited by 184 publications

(97 citation statements)

References 38 publications

(61 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In order to find out optimum pH for maximum removal, a number of working solutions have been used with different pH [56][57][58][59][60][61][62][63][64][65] .Experimental data indicate that the biosorption of copper onto Kafal leaves increase very rapidly from the percentage removal 10.98 to 88.98 % under the pH range 1-6. At lower pH, about all active sites or the organic groups present on the surface of biosorbents undergoes protolysis.…”

Section: Effect Of Phmentioning

confidence: 99%

See 1 more Smart Citation

"BIOSORPTION OF COPPER (II) ON TO THE WASTE LEAVES OF KAFAL (Myrica esculenta) "

2018

RJC

View full text Add to dashboard Cite

The commonly used removal processes for heavy metals from contaminated wastewater and cited in the literature are chemical precipitation, electrowinning, carbon adsorption, reverse osmosis, preconcentrations, biosorption, phytoremediation etc. Among these, biosorption is comparatively efficient, low cost, economical and reliable process. Actually, the reliability of the process is depending on the choice of local biosorbents and their abundant availability. The waste plant leaves of Kafal were collected from the region of Kumaun hills of India. The paper explains that the Kafal leaf powder is a good biosorbent for the removal of Cu (II) ions from contaminated wastewater under batch study. The experimental data indicate that high removal efficiency is obtained at optimized conditions viz. higher pH, lower metal ion concentrations, moderate higher temperatures and higher dosage of biosorbents. The biosorption efficiency is recorded 88.98% at pH 6, 48.99% at contact time 70 minutes and 40.01 % at a higher dosage of biosorbent. The regression value is indicating that the order for all used isotherms model is Langmuir> Freundlich > Temkin.

show abstract

Section: Effect Of Phmentioning

confidence: 99%

“…After that, repulsion occurs between the protonated active sites and metal ions. The removal of metal ions increases with increase in pH; this may be due to the availability of non protonated active sites for metal ions 65 . …”

Section: Effect Of Phmentioning

confidence: 99%

"BIOSORPTION OF COPPER (II) ON TO THE WASTE LEAVES OF KAFAL (Myrica esculenta) "

2018

RJC

View full text Add to dashboard Cite

show abstract

“…Using the above same method, the activation energies on various adsorptions 33-38 were estimated and the activation energies [40][41][42][43]50 judged to be scientific mistakes were reevaluated (Table 2). 59 .…”

Section: The Estimation Of Activation Energy (E a ) On Several Adsorpmentioning

confidence: 99%

“…Cu (II) and Pb (II) concentration curves calculated using equation (4) As shown the results in Table 4 and Equation (4), the reaction orders of Cu (II) and Pb (II) are different, i.e. this means that the adsorption mechanisms of Cu (II) and Pb (II) aren't same.…”

Section: Figure 1|mentioning

confidence: 99%

“…Activation energy is the energy which must be available to a chemical system with potential reactants to result in a reaction. Activation energy is obtained by Arrhenius equation and the rate constants of different temperature.Activation energy can't be evaluated by the many of previous adsorption kinetic models, such as the pseudo-order models [1][2][3][4][12][13][14][15] and its changed types [5][6][7][8][20][21][22][23] . These models involve the adsorption amount q e (No.…”

mentioning

confidence: 99%

See 1 more Smart Citation

A New Adsorption Rate Equation in Batch Systems

Hong¹,

Sin²,

Pak³

et al. 2018

Preprint

View full text Add to dashboard Cite

In this paper, the deficiencies and cause of previous adsorption kinetic models were revealed, ne w adsorption rate equation has been proposed and its validities were verified by kinetic analysis of various experimental data. This work is a new vie w on the adsorption kinetics rather than a comment on the previous adsorption papers.Many adsorption kinetic models had been proposed and used during about 120 years. The frequently used and recently established 28 models 1-31 were listed in Table S1. The development of adsorption kinetic model has been conducted to obtain the specific models that agree better with the experimental data, as the result, dozens of kinetic models were established. The most of them were based on the Lagergren model 1 (in 1898) and Langmuir kinetic model 24 (in 1918), there were no innovative development. The Deficiencies and Cause of Previous Adsorption Kinetic ModelsCan those be used for the calculation of activation e nergy? One of the important objectives of kinetic study is to evaluate activation energy. Activation energy is the energy which must be available to a chemical system with potential reactants to result in a reaction. Activation energy is obtained by Arrhenius equation and the rate constants of different temperature.Activation energy can't be evaluated by the many of previous adsorption kinetic models, such as the pseudo-order models [1][2][3][4][12][13][14][15] and its changed types [5][6][7][8][20][21][22][23] . These models involve the adsorption amount q e (No. 1-9 and No. 13-21 in Table S1). When Arrhenius equation is used to calculate activation energy, the rate constants must be a constant at given temperature. However, not only the

show abstract

Blast Furnace Slag of a Ferrosilicon Firm in Aswan Governorate, Upper Egypt, as an Adsorbent for the Removal of Merocyanine Dye from Its Aqueous Solution

Taha

Mosaed

2010

Chemistry & Biodiversity

View full text Add to dashboard Cite

The adsorption potential of the blast furnace slag of a ferrosilicon firm in Aswan Governorate, Egypt, to decolorize aqueous solutions of 3-methyl-1-phenylpyrazol-5-one 4[2] merocyanine dye (1) was investigated at room temperature. The influence of the solution pH, the quantity of adsorbent, the initial concentration of 1, and the applied contact time were studied with the batch technique. The maximum percentage of removal of 1 was observed at pH 4. The adsorption data were better fitted by the Freundlich than by the Langmuir adsorption isotherm model, confirming the formation of monolayers of 1 on the adsorbent surface. Kinetic rate constants and the transient behavior at different initial concentrations of 1 were determined with both the Lagergren pseudo-first-order and the Ho and McKay pseudo-second-order kinetic models. The calculated kinetic parameters revealed that the adsorption of 1 on blast furnace slag followed a second-order chemisorption process.

show abstract

Removal of Pb(II) ions from aqueous solutions by sulphuric acid-treated wheat bran

Cited by 184 publications

References 38 publications

"BIOSORPTION OF COPPER (II) ON TO THE WASTE LEAVES OF KAFAL (Myrica esculenta) "

"BIOSORPTION OF COPPER (II) ON TO THE WASTE LEAVES OF KAFAL (Myrica esculenta) "

A New Adsorption Rate Equation in Batch Systems

Blast Furnace Slag of a Ferrosilicon Firm in Aswan Governorate, Upper Egypt, as an Adsorbent for the Removal of Merocyanine Dye from Its Aqueous Solution

Contact Info

Product

Resources

About