adsorption isotherm | An-Najah Staff

Uptake of Cadmium from Water by Beech Leaves

Tue, 2014-01-14 10:34 — Mohammed Al-Subu'

Journal Title, Volume, Page:

Journal of Environmental Science and Health . Part A: Environmental Science and Engineering and Toxicology Volume 27, Issue 3, 1992

Year of Publication:

1992

Link:

http://www.tandfonline.com/doi/full/10.1080/10934529209375751

Authors:

Radi Salim

Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine

M.M. Al‐Subu

Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine

Current Affiliation:

Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine

[email protected]

E. Sahrhage

Department of Ecology, Faculty for Biology , University of Bielefeld , Bielefeld, 4800, Germany

Preferred Abstract (Original):

Uptake of cadmium from aqueous solutions by beech leaves has been studied. The effect of several factors on both rate and amount of this uptake has been studied. These factors include concentration of leaves, concentration of cadmium, pH, competing ions and drying leaves. The pattern of the curves showing the loss of cadmium from solution has been explained. Applicability of the Freündlich adsorption isotherm on the present results has been examined and the parameters of this isotherm have been calculated. The order of reaction between cadmium ions and beech leaves has been determined and a mechanism for this reaction has been suggested.

Removal of Cadmium (II) Ions from Aqueous Solution by Tamrix Gallica Leaves

Sun, 2014-01-12 14:08 — Mohammed Al-Subu'

Journal Title, Volume, Page:

Journal of Environmental Engineering and Science, Volume 5, Issue 6, November 2006 pages 509 –515

Year of Publication:

2006

Link:

http://www.icevirtuallibrary.com/content/article/10.1139/s06-014

Authors:

FR Zaggout

Chemistry Department, Al-Azhar University, Gaza, Palestine

Mohamed M Al-Subu

Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine

Current Affiliation:

Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine

[email protected]

Tysser El-Ghoti

Chemistry Department, Al-Azhar University, Gaza Strip, Palestine

Preferred Abstract (Original):

Removal of cadmium from aqueous solutions by Tamrix gallica leaves has been investigated. The effect of several factors on the removal has been studied, including metal ions concentration, Tamrix leaves concentration, pH, presence of competing ions, agitation, crushing, and drying. Removal of cadmium by Tamrix leaves was found to be dependant on pH and the maximum removal of cadmium by Tamrix leaves was found at pH 5. The cadmium removal by Tamrix leaves has been found to depend on both the concentration of leaves and the concentration of cadmium in solution. The presence of foreign ions along with cadmium ions in water reduce the removal of cadmium in the order Cu > Pb > Ni > Na > K. Applicability of the Freundlich adsorption isotherm has been examined and the parameters of this isotherm have been calculated. The order of reaction between cadmium ions and Tamrix gallica leaves with respect to cadmium has been found to be first order and a mechanism based on adsorption of cadmium on leaves has been suggested.