Arsenic(V) Removal from Water by Resin Impregnated with Cyclodextrin Ligand

Jakub Lagiewka,Tomasz Girek,Robert Biczak,Iwona Zawierucha,Anna Nowik-Zajac,Wojciech Ciesielski,Barbara Pawlowska

doi:10.3390/pr10020253

Abstract

More rigorous environmental rules on hazardous metals release require the implementation of diverse methods to remove them from contaminated streams. The adsorption process is the most attractive method for removal of toxic metal ions from different aqueous solutions. In the present study, batch and fixed bed column experiments were carried out to investigate the performance of permethylated β-cyclodextrin impregnated resin for the removal of As(V) ions from aqueous solutions. Sorption of As(V) ions was performed in groups under a variety of pH and metal concentrations. It was noted that removal efficiency was the highest (98%) at pH 6.0, and at an initial As(V) concentration equal to 0.1 mg/L. Sorption model use for experimental data indicates that the removal mechanism of As(V) by the permethylated β-cyclodextrin impregnated resin was the physical sorption. The adsorption capacity of the cyclodextrin ligand immobilized onto Amberlite XAD-4 resin was 19 mg/g. In addition, the impregnated resin was regenerable, thus was able to be used over and over.

Highlights

Heavy metal and metalloid presence in the environment, due to their toxicity, is harmful, and mitigating this problem is of great importance
Timheprreesgunlatsteodfraedsisnoraprteioshno/dwen- in sorFpitgiounrecy7.clIetswuassinfgouthnedctohlautm, dnumrinogdefivweitchycpleersm, neothnyolatitceedabβl-eCcDhaimngpereingnsaotrepdtiroensicnaparaecity shoowf nthienrFeisginuroec7c.uIrtrewdasanfoducnodmtphaart,adblueripnegrcfeivnetacgyeclveasl,uneos nfoortitcheeabdleescohrapntigoenionfsAorsp(Vtio) nions capacity of the resin occurred and comparable percentage values for the desorption of As(V) ions were achieved. These results indicate that the permethylated β-CD impregnated Amberlite XAD-4 resin was stable and regenerable without any physical or chemical damage, could be re-used
The permethylated β-CD impregnated Amberlite XAD-4 resin has been found efficient for adsorption of As(V) ions from water

Summary

Introduction

Heavy metal and metalloid presence in the environment, due to their toxicity, is harmful, and mitigating this problem is of great importance. Contamination of water by toxic metal ions has gradually increased over recent years due to overpopulation, insufficient hazardous waste storage, and industrial activity. Arsenic occurs in the following oxidation states: −3, 0, +3 and +5; arsenite (As(III) and arsenate (As(V)) are most commonly met in water [4,5]. It can cause harmful effects to humans health, such as dermal abnormalities, problems with the bloodstream, neurological symptoms, diabetes, respiratory complications, and issues with the liver and kidneys [9,10].

Objectives

Methods

Results

Conclusion