Adsorption | An-Najah Staff

The Study of Kinetics and Thermodynamics of Selected Pharmaceuticals and Personel Care Products on Agriculture Soil

Wed, 2013-02-13 21:33 — Shehdeh Jodeh

Journal Title, Volume, Page:

European Journal of Chemistry, 3 (4), 468-474

Year of Publication:

2012

Link:

http://www.eurjchem.com/index.php/eurjchem/article/view/706

Authors:

shehdeh jodeh

Chemistry Department, An‐ Najah National University, Nablus, 11347, Palestine

Current Affiliation:

Department of Chemistry, An- Najah N. University, PO Box 7, Nablus, West Bank, Palestine

[email protected]

Preferred Abstract (Original):

Pollution of the aquatic environment by human and veterinary waste pharmaceuticals is an increasing area of concern but little is known about their ecotoxicological effects on wildlife. In this study, three pharmaceuticals were selected (ibuprofen, amoxicillin and caffeine) as examples that are released in the environment. All of them are marketed in the Palestinian market (Pharmacies), private clinics and hospitals. The adsorption of the selected pharmaceuticals was examined by batch sorption experiments onto agriculture soil. Pharmaceuticals adsorption kinetics followed the pseudo-second-order adsorption model. Adsorption isotherms were best fitted by the Freundlich isotherm model. The “n” parameters were higher than 1 and the K_f values for all of them were less than 1. High removal rates of amoxicillin and ibuprofen were achieved in acidic media (pH = 1-4) and reached more than 88% Except for the caffeine increased at higher pH and reached more than 92%. The thermodynamics parameters showed that the adsorption process on soil was spontaneous and exothermic.

Understanding Complexation and Desorption of Copper Ion in Three Contaminated Soil Types in Palestine Using Series of Different Surfactants and Ligands

Mon, 2012-12-24 13:08 — Shehdeh Jodeh

Journal Title, Volume, Page:

Jordan Journal of Chemistry Vol. 7 No.2, 2012, pp. 221-230

Year of Publication:

2012

Link:

http://jjc.yu.edu.jo/Issues/Vol7No2PDF/09.pdf

Authors:

Shehdeh Jodeh

Department of Chemistry, Najah University, P.O. Box 7, Nablus, Palestine.

Current Affiliation:

Department of Chemistry, Najah University, P.O. Box 7, Nablus, Palestine.

[email protected]

Ahmad A.Abu-Obaid

Radi Salim

Preferred Abstract (Original):

In this study we have investigated the efficiency of surfactants and ligands on cleaning artificially contaminated red, sandy and white chalk soil samples from copper ion. Various concentrations of four different surfactants: Triton, X-100, SDS, Tergitol and Tween 80 were used as washing solution for remediation of contaminated soils. Different concentrations of three different ligands (I - - , SCN and EDTA) along with nonionic surfactant, Triton X-100, were applied as soil washing agents to desorb copper from artificially contaminated soils.

Rapid Removal And Recovery Of Pb(II) From Wastewater By Magnetic Nanoadsorbents

Tue, 2011-05-17 08:12 — Nashaat N. Nassar

Journal Title, Volume, Page:

Journal of Hazardous Materials, 184 (1-3), 538-546

Year of Publication:

2010

Link:

http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TGF-50W1TM1-8&_user=1...

Authors:

Nashaat N. Nassar

Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta, Canada

Current Affiliation:

Department of Chemical Engineering, An-Najah National University, P.O. Box 7, Nablus, Palestine

[email protected]

Preferred Abstract (Original):

Iron oxide nanoadsorbents are cost-effective adsorbents that provide high adsorption capacity, rapid adsorption rate and simple separation and regeneration. In this study, Fe3O4 nanoadsorbents have been employed for the removal of Pb(II) ions from aqueous solutions by a batch-adsorption technique. The effects of contact time, initial concentration of Pb(II) ions, temperature, solution pH and coexisting ions on the amount of Pb(II) adsorbed have been investigated. Pb(II) adsorption was fast, and equilibrium was achieved within 30 min. The amount of Pb(II) adsorbed increased as temperature increased, suggesting an endothermic adsorption. The optimal pH value for Pb(II) adsorption was around 5.5. Furthermore, the addition of coexisting cations such as Ca2+, Ni2+, Co2+, and Cd2+ has no remarkable influence on Pb(II) removal efficiency. The adsorption equilibrium data fitted very well to Langmuir and Freundlich adsorption isotherm models. The thermodynamics of Pb(II) adsorption onto the Fe3O4 nanoadsorbents indicated that the adsorption was spontaneous, endothermic and physical in nature. The desorption and regeneration studies have proven that Fe3O4 nanoadsorbents can be employed repeatedly without impacting its adsorption capacity.

Solid olive waste in environmental cleanup: Oil recovery and carbon production for water purification

Sun, 2011-05-08 09:04 — Amer M EL-Hamouz

Journal Title, Volume, Page:

Journal of Environmental Management Volume 84, Issue 1, July 2007, Pages 83-92

Year of Publication:

2007

Link:

http://www.sciencedirect.com/science/article/pii/S0301479706001307

Authors:

Amer El-Hamouz

Department of Chemical Engineering, An-Najah National University, P.O. Box 7, Nablus, Palestine

Current Affiliation:

Department of Chemical Engineering, An-Najah National University, Nablus, Palestine

[email protected]

Hikmat S. Hilal

Department of Chemistry, An-Najah National University, P.O. Box 7, Nablus, Palestine

[email protected]

Nashaat Nassar

Department of Chemical Engineering, An-Najah National University, P.O. Box 7, Nablus, Palestine

Zahi Mardawi

Department of Chemical Engineering, An-Najah National University, P.O. Box 7, Nablus, Palestine

Preferred Abstract (Original):

A potentially-economic three-fold strategy, to use solid olive wastes in water purification, is presented. Firstly, oil remaining in solid waste (higher than 5% of waste) was recovered by the Soxhlet extraction technique, which can be useful for the soap industry. Secondly, the remaining solid was processed to yield relatively high-surface area active carbon (AC). Thirdly, the resulting carbon was employed to reversibly adsorb chromate ions from water, aiming to establish a water purification process with reusable AC. The technique used here enabled oil recovery together with the production of a clean solid, suitable for making AC. This process also has the advantage of low production cost.

Removal of Dissolved Copper from Polluted Water Using Plant Leaves

Mon, 2011-02-28 12:03 — Ibrahim Diab Abu-Shqair

Journal Title, Volume, Page:

Rev. Int. Contam. Ambient. 17 (2) 91-95

Year of Publication:

2001

Link:

http://www.revistas.unam.mx/index.php/rica/article/view/25528

Authors:

Ibrahim Diab Abu-Shqair

Department of Chemistry, An Najah National University, P. O. Box 7, Nablus, Palestine

Current Affiliation:

Department of Chemistry, An Najah National University, P. O. Box 7, Nablus, Palestine

[email protected]

Mohammed M. Al-Subu

Department of Chemistry, An Najah National University, P. O. Box 7, Nablus, Palestine

R. Salim

Department of Chemistry, An Najah National University, P. O. Box 7, Nablus, Palestine

K. M. Swaileh

Department of Biology and Biochemistry, Faculty of Science, Birzeit, Palestine

Preferred Abstract (Original):

Removal of copper from polluted water by plant leaves was studied using 15 species. Copper was recovered in variable percentages depending on the species and pH value of the solution. Copper recovery from a 20 mg/L copper solution ranged between 88% (in poplar leaves) and 33% (in oak leaves). For all leaves studied, maximum copper recoveries were found to be between pH 4 and 6 depending on the plant species. At pH 2 the copper was not removed by the plant leaves studied. Adsorption was suggested as the main mechanism for the reaction between copper ions and plant leaves with a reaction order equal to one.

Solid Olive Waste In Environmental Cleanup: Oil Recovery And Carbon Production For Water Purification

Thu, 2010-05-27 20:23 — Nashaat N. Nassar

Journal Title, Volume, Page:

Journal of Environmental Management Volume 84, Issue 1, July 2007, Pages 83-92

Year of Publication:

2007

Link:

http://www.sciencedirect.com/science/article/pii/S0301479706001307

Authors:

Amer El-Hamouz

Department of Chemical Engineering, An-Najah National University, P.O. Box 7, Nablus, Palestine

Hikmat S. Hilal

Department of Chemistry, An-Najah National University, P.O. Box 7, Nablus, Palestine

Nashaat Nassar

Department of Chemical Engineering, An-Najah National University, P.O. Box 7, Nablus, Palestine

Current Affiliation:

Department of Chemical Engineering, An-Najah National University, P.O. Box 7, Nablus, Palestine

[email protected]

Zahi Mardawi

Department of Chemical Engineering, An-Najah National University, P.O. Box 7, Nablus, Palestine

Preferred Abstract (Original):

A potentially-economic three-fold strategy, to use solid olive wastes in water purification, is presented. Firstly, oil remaining in solid waste (higher than 5% of waste) was recovered by the Soxhlet extraction technique, which can be useful for the soap industry. Secondly, the remaining solid was processed to yield relatively high-surface area active carbon (AC). Thirdly, the resulting carbon was employed to reversibly adsorb chromate ions from water, aiming to establish a water purification process with reusable AC. The technique used here enabled oil recovery together with the production of a clean solid, suitable for making AC. This process also has the advantage of low production cost.

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Kinetic, Mechanistic, Equilibrium And Thermodynamic Studies On The Adsorption Of Acid Red Dye From Wastewater By Fe2O3 Nanoadsorbents

Thu, 2010-05-27 10:00 — Nashaat N. Nassar

Journal Title, Volume, Page:

Separation Science And Technology Volume 45, Issue 8, 1-12, 2010

Year of Publication:

2010

Link:

http://www.informaworld.com/smpp/content~db=all~content=a921994369~frm=titlelink

Authors:

Nashaat N. Nassar

Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta, Canada

Current Affiliation:

Department of Chemical Engineering, An-Najah National University, P.O. Box 7, Nablus, Palestine

Preferred Abstract (Original):

The presence of dyestuffs in wastewater poses an environmental concern since these organic contaminants are toxic to aquatic and non-aquatic life. In addition, these contaminants are difficult to remove or biodegrade, which poses a challenge to the conventional wastewater treatment techniques. In this work, the adsorption of acid red dye 27 (AR27) onto γ-Fe₂O₃ nanoadsorbents was studied for the removal of red dye from aqueous solutions by the batch-adsorption technique. The experiments were carried out at different conditions of contact time, initial AR27 concentration, temperature, co-existing ions, and solution pH. It was found that the adsorption was a rapid process, and equilibrium was achieved in less than 4 minutes. The removal of AR27 decreased with the increase in solution pH and temperature. Furthermore, the addition of chloride and nitrate anions has no remarkable influence on AR27 removal efficiency. On the other hand, the effects of sulfate and bicarbonate anions on the removal of AR27 were significant. The adsorption equilibrium data fitted very well using Langmuir and Freundlich adsorption isotherm models. The data obtained from adsorption isotherms at different temperatures were used to calculate thermodynamic quantities of adsorption, such as standard Gibbs free energy change, enthalpy change , and entropy change . The adsorption process was found to be spontaneous, exothermic and physical in nature. The results indicate that γ-Fe₂O₃ nanoadsorbents could be employed for the removal of dyes from wastewater.

Solid Olive Waste in Environmental Cleanup: Oil Recovery and Carbon Production for Water Purification

Wed, 2010-04-21 14:32 — Hikmat S. Hilal, D.Sc.

Journal Title, Volume, Page:

Journal of Environmental Management 84 (2007) 83–92

Year of Publication:

2007

Link:

http://www.sciencedirect.com/science/article/pii/S0301479706001307

Authors:

Hilal HS

Department Of Chemistry, An-Najah N. University, Nablus, PO Box 7, West Bank, Palestine

Current Affiliation:

Department of Chemistry, An-Najah National University, P.O. Box 7, Nablus, Palestine

[email protected]

El-Hamouz A

Department Of Chemical Engineering, An-Najah National University, P.O. Box 7, Nablus, Palestine

Nassar N

Department Of Chemical Engineering, An-Najah National University, P.O. Box 7, Nablus, Palestine

Mardawi Z

Department Of Chemical Engineering, An-Najah National University, P.O. Box 7, Nablus, Palestine

Preferred Abstract (Original):

A potentially-economic three-fold strategy, to use solid olive wastes in water purification, is presented. Firstly, oil remaining in solid waste (higher than 5% of waste) was recovered by the Soxhlet extraction technique, which can be useful for the soap industry. Secondly, the remaining solid was processed to yield relatively high-surface area active carbon (AC). Thirdly, the resulting carbon was employed to reversibly adsorb chromate ions from water, aiming to establish a water purification process with reusable AC. The technique used here enabled oil recovery together with the production of a clean solid, suitable for making AC. This process also has the advantage of low production cost.

Full Text