Fixed - bed Column Adsorption Studies Using Synthetic Hydroxyapatite for Pb(II) Removal from Aqueous Solutions

Claudia Maria Simonescu,Christu Tardei,Iuliana-Raluca Tanase,Virgil Marinescu,Irina Nicoleta Purcaru

doi:10.37358/rc.19.5.7210

Abstract

In the present paper, the adsorptive Pb(II) removal from synthetic aqueous solutions using a 2 cm diameter hydroxyapatite column has been studied through column adsorption experiments by varying column depths (1, 2, 3, 4 cm) and flow rate (10, 15, 22.5 mL/min). Different types of synthetic hydroxiapatites have been involved in experiments. Column design parameters such as critical bed depth and adsorption capacity have been determined from experimental studies. The results revealed the effectiveness of synthetic hydroxyapatite porous beads in Pb(II) removal from aqueous synthetic solutions.

Highlights

In the present paper, the adsorptive Pb(II) removal from synthetic aqueous solutions using a 2 cm diameter hydroxyapatite column has been studied through column adsorption experiments by varying column depths (1, 2, 3, 4 cm) and flow rate (10, 15, 22.5 mL/min)
The results revealed the effectiveness of synthetic hydroxyapatite porous beads in Pb(II) removal from aqueous synthetic solutions
By correlating the data from the experimental study, the following conclusions can be drawn: -all tested materials have lead retaining capacity from synthetic aqueous solutions; -the retention capacity depends on the characteristics of the tested materials; -breakthrough volume and breakthrough time depend on the characteristics of the tested materials; -a larger volume of wastewater can be efficiently cleaned using HAP-III adsorbent material which is characterized by a higher porosity value and a higher density value;

Summary

Introduction

The adsorptive Pb(II) removal from synthetic aqueous solutions using a 2 cm diameter hydroxyapatite column has been studied through column adsorption experiments by varying column depths (1, 2, 3, 4 cm) and flow rate (10, 15, 22.5 mL/min). The obtained granular products consisted of the adsorbent mass have been used for the dynamic adsorption tests for the removal of lead ions from synthetic aqueous solutions. The influence of the addition of porous material on the porosity level, an essential condition in the adsorption process of heavy metals in their aqueous solutions, was followed.

Results

Conclusion