Solhe F. Alshahateet
Aqaba University of Technology, Jordan
Title: Adsorption studies of some heavy metal ions onto C-4-bromophenylcalix-[4]resorcinarene
Biography
Biography: Solhe F. Alshahateet
Abstract
Adsorption studies were performed on selected heavy metals ((Pb(II), Co(II), Cu(II), Mn(II) and Zn(II)) using synthetic adsorbent (C-4-bromophenylcalix[4]resorcinarene 3) to investigate the effect of different parameters such as adsorbate dose, agitation time, and pH. Selectivity of the adsorbents towards a mixture of heavy metals adsorbates was investigated. Results showed that optimum agitation time of 30 min at pH of 5.6 at initial concentration of 1 ppm for all investigated heavy metals. Different kinetic models of Santosa first order, Lagergren pseudo first order and Ho pseudo second order were applied on the adsorption experimental data. Results proved that all adsorption processes were followed and adopted pseudo second order kinetic model. The adsorption capacity of C-4-bromophenylcalix[4]resorcinarene towards the selected heavy metal ions was 84.55%, 84.29%, 84.06%, 79.76%, 75%, for Cu(II), Pb(II), Zn(II), Mn(II) and Co(II), respectively. Selectivity of adsorption was tested on a mixture of Cu(II), Mn(II), Zn(II), Pb(II) and Co(II) with initial concentration of 1 ppm of each heavy metal and agitated time of 10 min with the adsorbent, removal percentage of each metal showed different values from each heavy metal alone as it was in decreasing order Cu(II) > Co(II) > Mn(II) > Pb(II) > Zn(II). The rate constant value for each heavy metal adsorption mechanism obtained from Ho pseudo second order model was in the order Co(II) > Cu(II) > Zn(II > Mn(II) > Pb(II).