Biosorption of lead(II) and chromium(VI) on groundnut hull: Equilibrium, kinetics and thermodynamics study

Qaiser, Suleman; Saleemi, A.R.; Umar, Muhammad

doi:10.2225/vol12-issue4-fulltext-6

Cited by 45 publications

(56 citation statements)

References 31 publications

(44 reference statements)

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“…The D-R isotherm assumes biosorption on a heterogeneous surface 20,21 . The D-R isotherm is given by: ln qe= ln qo-Kdε 2 (6) Kd is identified from mean free energy E, qo is the infusion capacity and ε is the Polanyi potential.…”

Section: D-r Isothermmentioning

confidence: 99%

"Use of Plant Biomass for Removal of Malachite Green From Aqueous Solution and Optimization Using Central Composite Design (Ccd) "

2018

RJC

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Biosorption is the attractive technique of wastewater treatment to retain the dyes. Biosorption of Malachite Green (MG) using leaf biomass Plumbago Zeylanica (PZ) from an aqueous solution was studied using the batch technique. The batch analysis was accessed by altering the variables like time, pH, dye concentration, biosorbent dosage, average biosorbent size and temperature. The % removal of 93% was attained at 25mg/L of concentration for 50ml of an aqueous solution with a time of 45min, pH 9, the dosage of 0.1g and average biosorbent size of 63 µm having 303 K as temperature. By utilizing four models the equilibrium data were reviewed. The Langmuir model was the best fit with an R 2 value of 0.998. The kinetics data were evaluated by three models. The data was suitable to Pseudo-second order kinetics. Thermodynamic parameters evaluated are enthalpy change (∆H o ), entropy change (∆S o ) and free energy (∆G o ). The negative value of (∆H o ) represents an exothermic reaction. The operating conditions are optimized using Response Surface Methodology (RSM)

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Section: D-r Isothermmentioning

confidence: 99%

"Use of Plant Biomass for Removal of Malachite Green From Aqueous Solution and Optimization Using Central Composite Design (Ccd) "

2018

RJC

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“…For example, researchers have documented that exposure to Cr(VI) can cause long-term and serious public health hazards such as skin irritation, lung cancer, as well as kidney, liver and gastric damage (Qaiser et al 2009;Vinodhini and Das 2009). Cr(VI) also poses significant ecological risk.…”

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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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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“…The dried biomass was then preserved in air-tight polyethene paper to protect it from moisture and make ready for analysis. 13 The adsorbent was used in their natural form without any form of modification.…”

Section: Preparation Of Adsorbentmentioning

confidence: 99%

“…The adsorption capacity q L (mg/g) for cadmium (6.993mg/g) was lower than that of lead (58.82mg/g), suggesting that the amount of Pb(II) sorbed per unit mass of the adsorbent was higher than that of Cd(II). Qaiser et al 13 reported the maximum sorption capacities for lead on groundnut hull (31.54mg/g) and baggase fly ash (2.5mg/g). Table 3 show the comparison of Sorghum husk with other agricultural and commercial adsorbents using their maximum adsorption capacity (q max -mg/g) for the adsorption of Cd(II) and Pb(II).…”

mentioning

confidence: 99%

Characterization and Adsorption Isotherm Studies of Cd (II) And Pb (II) Ions Bioremediation from Aqueous Solution Using Unmodified Sorghum Husk

Olawale

et al. 2017

JABB

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Contamination of environment by heavy metals has become a major concern worldwide. The role of conventional methods in remediating heavy metals has become ineffective and costly. Therefore, it becomes imperative to explore bioremediation using a cost effective, efficient and environmentally friendly alternative method of removing heavy metals. In this study, the adsorption behavior of Sorghum husk, a low-cost adsorbents, with respect to Pb +2 and Cd 2+ ions, has been studied in order to consider its application to the treatment of wastewater. The physicochemical properties of the unmodified sorghum husk were predetermined. The batch experimental method was employed: parameters such as pH, contact time, particle size and initial metal concentration were studied. The influence of the pH of the metal ion solutions on the uptake levels of the metal ions by the adsorbent used was carried out between pH 3 and 8. The optimum pH for Pb +2 and Cd +2 removals by sorghum husk were 6 and 5 respectively. An equilibrium time of 80min was required for the adsorption of Pb +2 and 60min for Cd +2 ions onto sorghum husk. Percentage sorption of Pb +2 increased from 21 to 80% and that of Cd +2 from 15 to 55% as adsorbent dose was increased from 0.1 to 1g while adsorption capacity decreased from 14 to 5.3mg/g for Pb +2 and 32.5 to 9.3mg/g for Cd +2 with increase in dose. Percentage removal of Pb +2 increased from 24.8 to 93.7% while that of Cd +2 from 22.4 to 91.6% with decrease in adsorbent particle size from 1000μm to 100μm. The uptake capacity of the adsorbent increased from 6.5 to 12.4mg/g for Pb +2 and 2.1 to 5.3mg/g for Cd +2 as the initial metal ion concentration was raised from 50 to 200mg/L. The experimental data was fitted into the Langmuir and Freundlich models; the data was best fitted with the Langmuir model. The results demonstrated that sorghum husk holds potential to remove cationic heavy metal species from industrial wastewater.Keywords: bioremediation, adsorption, wastewater, heavy metals, isotherms Journal of Applied Biotechnology & Bioengineering Research ArticleOpen Access Characterization and adsorption isotherm studies of Cd (II) and Pb (II) ions bioremediation from aqueous solution using unmodified sorghum husk 114Copyright: ©2017 Tatah et al. Citation:Tatah VS, Otitoju O, Ezeonu CS, et al. Characterization and adsorption isotherm studies of Cd (II) and Pb (II) ions bioremediation from aqueous solution using unmodified sorghum husk.

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Biosorption of lead(II) and chromium(VI) on groundnut hull: Equilibrium, kinetics and thermodynamics study

Cited by 45 publications

References 31 publications

"Use of Plant Biomass for Removal of Malachite Green From Aqueous Solution and Optimization Using Central Composite Design (Ccd) "

"Use of Plant Biomass for Removal of Malachite Green From Aqueous Solution and Optimization Using Central Composite Design (Ccd) "

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

Characterization and Adsorption Isotherm Studies of Cd (II) And Pb (II) Ions Bioremediation from Aqueous Solution Using Unmodified Sorghum Husk

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