Pb (II) sorption by acidically modified Cicer arientinum biomass

Nadeem, Raziya; Nasir, Mubashir Hussain; Hanif, Muhammad

doi:10.1016/j.cej.2008.12.001

Cited by 45 publications

(15 citation statements)

References 34 publications

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“…The Tempkin isotherm assumes that the heat of adsorption of all the molecules increases linearly with coverage of the adsorbate molecules over adsorbent surface [47]. The linear form of this isotherm can be given by…”

Section: Tempkin Isothermmentioning

confidence: 99%

Adsorptive removal of hazardous anionic dye “Congo red” from wastewater using waste materials and recovery by desorption

Mittal

Malviya

et al. 2009

Journal of Colloid and Interface Science

631

208

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a b s t r a c tThe present investigation assesses the applicability of waste materials-bottom ash and deoiled soya-for the removal of the colorant Congo red from wastewaters. The adsorption characteristics and dye removal efficiency of adsorbents have been determined by investigating factors such as effect of pH, effect of concentration of the dye, amount of adsorbents, contact time, and temperature. Langmuir, Freundlich, Tempkin, and Dubinin-Radushkevich isotherm models have been used to evaluate the ongoing adsorption. With the help of adsorption isotherm data different thermodynamic parameters such as free energy; enthalpy, and entropy have been calculated. The estimated free energy has been obtained as À21.52 kJ mol À1 for bottom ash and À16.88 kJ mol À1 for deoiled soya. On the basis of pseudo-first-order and pseudo-second-order kinetic equations different kinetic parameters have been obtained. Column operations depicted good adsorptive tendencies for Congo red with 96.95% and 97.14% saturation of dye on bottom ash and deoiled soya, respectively. Regeneration of the saturated columns has been made by eluting NaOH solution and more than 90% dye has been recovered in both cases.

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Section: Tempkin Isothermmentioning

confidence: 99%

Adsorptive removal of hazardous anionic dye “Congo red” from wastewater using waste materials and recovery by desorption

Mittal

Malviya

et al. 2009

Journal of Colloid and Interface Science

631

208

View full text Add to dashboard Cite

show abstract

“…dengan α laju awal adsorpsi (mg g −1 min −1 ) dan β tetapan desorpsi (g mg −1 ) yang menyatakan penempatan permukaan oleh adsorbat dan energi aktivasi kemisorpsi (Gupta and Babu, 2009;Nadeem et al, 2009;Noroozifar et al, 2009). Dengan mengambil batas t = 0 -t, q t = 0 -q t dan menganggap (αβ) >> t, maka persamaan ini dapat disederhanakan menjadi:…”

Section: Model Elovichunclassified

PROSPEKTIF LEMPUNG ALAM CENGAR SEBAGAI ADSORBEN POLUTAN ANORGANIK DI DALAM AIR: KAJIAN KINETIKA ADSORPSI KATION Co(II)

Muhdarina

Mohammad

Muchtar

2010

Reaktor

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Abstrak Kemampuan lempung alam Cengar untuk melepaskan kation Co(II) dari air limbah model telah diuji dengan proses adsorpsi. Lempung alam Cengar diimpregnasi dengan larutan garam ammonium 1 molar untuk meningkatkan kemampuan adsorpsinya. Kapasitas adsorpsi kation Co(II) oleh lempung PENDAHULUANKeberadaan polutan logam berat di dalam badan air merupakan masalah lingkungan saat ini yang secara signifikan memberi dampak negatif terhadap kualitas sumber air karena material ini bersifat toksik dan tidak terbiodegradasi. Peningkatan konsentrasi logam berat di lingkungan menyebabkan logam-logam tersebut terkumpul di dalam rantai kehidupan airtumbuhan -hewan -manusia sehingga menjadi ancaman yang luar biasa bagi metabolisme kehidupan. Karena itu, adanya logam berat di dalam air akan membahayakan kesehatan karena daya racunnya yang tinggi (Naiya et al., 2009). Prayitno (2008 merekomendasikan setidaknya ada dua tindakan yang 81

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“…The first-order equation is shown below [9]: Where q t refer the amount of Zn(II) adsorbed per unit weight of adsorbent (mg/g) at time t (min). K 1 (l/min) is the rate constant of the first-order sorption.…”

Section: Kinetic Modelsmentioning

confidence: 99%

Adsorption of Zn (II) on Acacia Tortilis Leaves Treated with Sulfuric Acid: Kinetic Studies

2016

IJACEBS

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Abstract--In the present work, the potential use of Acacia tortilis leaves to remove Zn(II) from water media was evaluated. In case to activate the surface of Acacia tortilis leaves, some acids such as sulfuric, phosphoric and hydrochloric of 0.1 meq/ml were tried. High adsorption capacity was obtained when sulfuric acid was used. Kinetic data was measured in batch condition. The effect of some parameters such as: initial pH, adsorbent dosage and contact time on the adsorption of Zn(II) has been studied. Zn(II) adsorption was initial pH, adsorbent dosage and time contact dependent. It has been found that the adsorption capacity of Zn(II) on Acacia tortilis leaves increased as initial pH increased and rich equilibrium at pH 4. On the other hand, the adsorption capacity of Zn(II) decreased as adsorbent dosage increased. The maximum adsorption capacity of Zn(II) was found to occur after two hours. Three kinetic models including fist order, pseudo second order and intra particle diffusion were selected to follow the adsorption process. The process follows a pseudo second order. The following parameters used in this research are constant: contact temperature, 25 o C±1; stirring speed, 400 rpm ; Zn(II) concentration, 400 mg/l and adsorbent size, less than 90 µm.

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Pb (II) sorption by acidically modified Cicer arientinum biomass

Cited by 45 publications

References 34 publications

Adsorptive removal of hazardous anionic dye “Congo red” from wastewater using waste materials and recovery by desorption

Adsorptive removal of hazardous anionic dye “Congo red” from wastewater using waste materials and recovery by desorption

PROSPEKTIF LEMPUNG ALAM CENGAR SEBAGAI ADSORBEN POLUTAN ANORGANIK DI DALAM AIR: KAJIAN KINETIKA ADSORPSI KATION Co(II)

Adsorption of Zn (II) on Acacia Tortilis Leaves Treated with Sulfuric Acid: Kinetic Studies

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