Abstract

We reported the synthesis of fluffy poly(o‐phenylenediamine) (PoPD) microspheres via chemical polymerization of oPD monomers by ammonium persulfate (APS) at room temperature. The SEM images showed that PoPD microspheres with an average diameter of 1.5 μm and their surfaces consist of highly oriented nanofibers. Furthermore, PoPD microspheres were used as adsorbent materials for the removal of Cr(VI) from aqueous solutions. The Cr(VI) adsorption behavior on the prepared PoPD microspheres was studied at different adsorption contact times, solution pH values, and amount of the adsorbent. Experimental isotherms of Cr(VI) ions were successfully fit to the Langmuir isotherm model. The results indicate that the PoPD fluffy microspheres are an effective adsorbent for the removal of Cr(VI) ions from aqueous solutions, and they could be useful in treatment of Cr(VI)‐polluted wastewaters.

Highlights

  • Heavy metal ions and their compounds are widely used in different industries such as metallurgy, battery, paper, and paint manufacturing [1]

  • The PoPD submicrospheres were prepared via chemical polymerization of oPD monomers by ammonium persulfate (APS) at room temperature

  • The Cr(VI) adsorption behavior on the prepared PoPD fluffy microspheres has been studied at different adsorption contact times solution pH values and the amount of adsorbent

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Summary

Introduction

Heavy metal ions and their compounds are widely used in different industries such as metallurgy, battery, paper, and paint manufacturing [1]. The excessive use of heavy metal ions is increasing their amounts in aquatic systems. Heavy metal ions are among the most important pollutants in waters. They are nondegradable and continue to accumulate in water bodies [2]. Because of their toxic properties and the tendency for bioaccumulation in the food chain, it is necessary to take effective routes to reduce the concentration levels of heavy metals in waters [3]. The removal of Cr(VI) ion in contaminated water is of great importance

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