Adsorption studies of Cu(II), Ni(II) and Zn(II) on Ajwain (Trachysperum copticum), a medicinal plant
by Rifaqat Ali Khan Rao; Shaista Ikram
International Journal of Environmental Engineering (IJEE), Vol. 7, No. 2, 2015

Abstract: The removal of Cu(II), Ni(II) and Zn(II) ions onto Ajwain (Trachysperum copticum) was investigated using batch adsorption technique. The extent of adsorption was a function of pH, adsorbent dose, contact time and initial metal ion concentration. The adsorption of Cu(II), Ni(II) and Zn(II) was maximum at pH 5, 4 and 6 respectively. Experimental data were well fitted in Langmuir-type isotherm. The mean free energy in single and multi-metal-system indicated that adsorption of Cu(II), Ni(II) and Zn(II) was chemical in nature. Kinetic parameters for each kinetic model were calculated and discussed. The pseudo-second-order model was found to be best fit. Breakthrough capacity and desorption studies were carried by column process. The breakthrough capacities for Cu(II), Ni(II) and Zn(II) were found to be 39, 26 and 26 mg g⁻¹ respectively in single metal system and reduced to 24, 21 and 18 mg g⁻¹ respectively in multi-metal system.

Online publication date: Fri, 12-Jun-2015

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Environmental Engineering (IJEE):
Login with your Inderscience username and password:

Username:        Password:          Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com