Studies on efficiency of guava (Psidium guajava) bark as bioadsorbent for removal of Hg (II) from aqueous solutions

Lohani, Minaxi; Singh, Amarika; Rupainwar, D. C.; Dhar, D. N.

doi:10.1016/j.jhazmat.2008.02.072

Cited by 47 publications

(20 citation statements)

References 15 publications

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“…The calculated maximum adsorption capacity is 5.6 mg of Hg 2+ per gram of S1 (Fig. 8), which is superior/close to the previous reports [11,37]. As indicated by Fig.…”

Section: Removal Of Hg 2+supporting

confidence: 81%

A reusable naphthalimide-functionalized magnetic fluorescent nanosensor for the simultaneous determination and removal of trace Hg2+ in aqueous solution

Zhao

Zhu

et al. 2013

Journal of Colloid and Interface Science

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“…The calculated maximum adsorption capacity is 5.6 mg of Hg 2+ per gram of S1 (Fig. 8), which is superior/close to the previous reports [11,37]. As indicated by Fig.…”

Section: Removal Of Hg 2+supporting

confidence: 81%

A reusable naphthalimide-functionalized magnetic fluorescent nanosensor for the simultaneous determination and removal of trace Hg2+ in aqueous solution

Zhao

Zhu

et al. 2013

Journal of Colloid and Interface Science

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“…In order to describe thermodynamic behaviour of the biosorption of metal ions onto C. siliqua bark, thermodynamic parameters including the change in free energy (∆G•), enthalpy (∆H•) and entropy (∆S•) were calculated from following equations [31,32]:…”

Section: Thermodynamic Parametersmentioning

confidence: 99%

Kinetic, Equilibrium and Thermodynamic Studies of the Biosorption of Heay Metals by Ceratonia Siliqua Bark

Farhan¹,

Salem²,

Ahmad³

et al. 2013

CHEMISTRY

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Biosorption of Zn(II), Ni(II), Cu(II) and Cd(II) ions from aqueous solutions onto Ceratonia siliqua (Carob tree) bark has been investigated in a batch biosorption process. The biosorption process was found to be dependent on pH of solution, initial metal ion concentration, biosorbent dose, contact time and temperature. The experimental equilibrium biosorption data were analyzed by Langmuir, Freundlich, Temkin and Dubinin-Radushkevic isotherm models. The Langmuir model gave a better fit than the other three models by higher correlation coefficient, R 2 . The maximum biosorption capacity calculated from the Langmuir isotherm was 42.19 mg/g, 31.35 mg/g, 21.65 mg/g and 14.27 mg/g for Ni(II), Zn(II), Cu(II) and Cd(II), respectively at optimum conditions. The kinetic studies indicated that the biosorption process of the metal ions followed well pseudo-second-order model. The negative values of ∆G o and the positive ∆H o revealed that the biosorption process was spontaneous and endothermic. According to the biosorption capacity, Ceratonia siliqua bark considered as an effective, low cost, and environmentally friendly biosorbent for the removal of metal ions ions from aqueous solutions.

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“…Working with arborescent ferns, a maximum adsorption capacity of 26.5 mg/g was reached with a temperature of 25 degrees Celsius [22]; using eucalyptus bark, the maximum adsorption capacity recorded was 33.11 mg/g with 20 degrees Celsius [23]; using peels of guava, it was found that the Hg (II) removal is highly dependent on pH, reaching its maximum adsorption with a pH of 9 which was 3.3 mg/g, obtained after 80 minutes [24]; using wood of papaya the maximum removal was 70.8 mg/g with a pH of 6.5 [25]; using rice ears the maximum adsorption of metallic ions was 0.110 mmol/g. In addition, rice ears showed an excellent result as a bioadsorbent of mercury metal ions in industrial effluents [26]; using sawdust of ceiba sawdust, peel of green bean, and wastes of chickpea harvest, removal capacities of 25.88; 23.66 and 22.88 mg/g were obtained respectively [27].…”

Section: Introductionmentioning

confidence: 89%

Kinetics of Adsorption in Mercury Removal Using Cassava (Manhiot esculenta) and Lemon (Citrus limonum) Wastes Modified with Citric Acid1

Tejada

Ortíz

Jaraba

2015

IyU

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The high toxic concentrations of mercury in water bodies and its negative impact on the environment has resulted in the need for research on effective and low-cost methods for the treatment of industrial effluents, such as adsorption. This research compares the feasibility and viability of the adsorption abilities of cassava and lemon citric acid-modified peels. The results showed that the modified peel of cassava has a better adsorption ability compared to that of lemon. The kinetics models that best fit the experimental data were the Pseudo-second order model and the Elovich model for both modified biomasses. This means that the mechanism that controls the adsorption is a second order reaction, and also shows that the catalytic area of the adsorbent is heterogeneous; whereas the Freundlich isotherm describes better the adsorption process. In conclusion, the use of waste material is possible for Hg (II) removal. The study of chemical modifications is suggested to improve the adsorption percentages.

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Studies on efficiency of guava (Psidium guajava) bark as bioadsorbent for removal of Hg (II) from aqueous solutions

Cited by 47 publications

References 15 publications

A reusable naphthalimide-functionalized magnetic fluorescent nanosensor for the simultaneous determination and removal of trace Hg2+ in aqueous solution

A reusable naphthalimide-functionalized magnetic fluorescent nanosensor for the simultaneous determination and removal of trace Hg2+ in aqueous solution

Kinetic, Equilibrium and Thermodynamic Studies of the Biosorption of Heay Metals by <i>Ceratonia </i><i>Si</i><i>liqua</i> Bark

Kinetics of Adsorption in Mercury Removal Using Cassava (Manhiot esculenta) and Lemon (Citrus limonum) Wastes Modified with Citric Acid1

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