Sorption equilibrium of mercury onto ground-up tree fern

Ho, Yuh‐Shan; Wang, Chung-Chi

doi:10.1016/j.jhazmat.2007.12.030

Cited by 64 publications

(28 citation statements)

References 56 publications

(72 reference statements)

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“…From the results, it is established that cassava peels presents higher adsorption capacity than lemon peels. However, when comparing this to the information of the papers consulted [22][23][24][25][26][27][28], it can be found that the researched waste materials have a low adsorption capacity; and this is why studying the chemical modification of these materials is recommended in order to find some that would increase the availability of functional groups that can be capable to remove mercury.…”

Section: Adsorption Isotherms and Kineticsmentioning

confidence: 99%

“…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: 99%

See 1 more Smart Citation

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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Section: Adsorption Isotherms and Kineticsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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“…K LF and K a (L mg −1 ) are the Sips constants. The value of q m in the Sips is 'optimized' through trial and error to get the best R 2 value (Ho and Wang 2008). K DR (mol 2 kJ −2 ) is the D-R constant, R is the gas constant (8.314 J mol −1 K −1 ) and T is the absolute temperature (K).…”

Section: Removal Of Bg (%)mentioning

confidence: 99%

Cempedak durian as a potential biosorbent for the removal of Brilliant Green dye from aqueous solution: equilibrium, thermodynamics and kinetics studies

Dahri

Lim

Mei

2015

Environ Monit Assess

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Cempedak durian peel (CDP) was used to remove Brilliant Green (BG) dye from aqueous solution. The adsorption of BG onto CDP was studied as functions of contact time, pH, temperature, ionic strength and initial concentration. In order to understand the adsorption process and its mechanisms, adsorption isotherm and kinetics models were used. The experiments were done under optimized 2-h contact time and ambient pH. Adsorption study showed that the Langmuir model best fitted with experimental data, and the maximum adsorption capacity was determined as 0.203 mmol g(-1) (97.995 mg g(-1)). Adsorption kinetics followed the pseudo 2nd order model, and intraparticle diffusion is involved but not as the rate-limiting step while Boyd model suggests that film diffusion might be in control of the adsorption process. Fourier transform infrared (FTIR) analysis showed that OH, C=O, C=C and NH functional groups might be involved in the adsorption of BG onto CDP. Thermodynamic study suggested that the adsorption of BG onto CDP is endothermic with ΔH (o) value of 12 kJ mol(-1) and adsorption is feasible. Regeneration of CDP's ability to remove BG was also studied using three different washing solutions. NaOH (0.1 M) was not only sufficient to be used to regenerate CDP's ability to remove BG but also improved its adsorption capability.

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“…Ho y Wang (2008), estudiaron el comportamiento de adsorción de mercurio en soluciones acuosas, utilizando Helechos Arborecenses. Se encontró que la capacidad de adsorción depende de la temperatura, ya que al aumentarla, también aumenta la capacidad de adsorción.…”

Section: Biomasas Residuales Utilizadas Para Remover Metales Pesaunclassified

Biomasa residual para remoción de mercurio y cadmio: una revisión

2012

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La contaminación de las aguas residuales industriales con metales pesados es uno de los problemas ambientales más graves que se presenta hoy en día. El tratamiento de estos efluentes mediante adsorbentes extraídos de biomasas residuales ha sido estudiado durante los últimos años como una alternativa económica y eficiente, con posibilidades para su aplicación industrial. En el presente artículo se identifican algunas biomasas usadas y su capacidad de adsorción de Mercurio y Cadmio en aguas contaminadas. Se encontró que los bioadsorbentes pretratados químicamente presentan mayor porcentaje de remoción que los que no han sido modificados, la biomasa con mejores resultados fue la cascara de arroz, para el mercurio, modificada con ácido sulfúrico con una remoción de 384,6 mg/g, y para el cadmio, modificada con álcalis con una remoción de 125,94 mg/g. Además, la cinética del proceso de adsorción, en la mayoría de los experimentos, es regida por la ecuación cinética de pseudo-segundo orden.

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Sorption equilibrium of mercury onto ground-up tree fern

Cited by 64 publications

References 56 publications

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

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

Cempedak durian as a potential biosorbent for the removal of Brilliant Green dye from aqueous solution: equilibrium, thermodynamics and kinetics studies

Biomasa residual para remoción de mercurio y cadmio: una revisión

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