Lead ion removal from water by hydroxyapatite nanostructures synthesized from egg sells with microwave irradiation

Fatemeh Safatian,Zahra Doago,Nastaran Ahadi,Hossein Rahmani Shams,Marzieh Torabbeigi

doi:10.1007/s13201-019-0979-8

Abstract

Hydroxyapatite nanostructures were synthesized by microwave irradiation from egg shells. This nanoadsorbent was used for effective removal of lead ions from water and wastewater samples. The effects of experimental conditions such as pH, temperature, contact time, dose of adsorbent and initial concentration of lead ions on removal were investigated. Langmuir and Freundlich isotherms were studied, and the results indicated that the adsorption mechanism was based on Langmuir isotherm. The synthesized nanoadsorbent shows high adsorption capacities for removal of lead ion from water samples.

Highlights

Widespread use of lead in various industries such as battery manufacturing, radiation shielding, acid metal plating, ammunition, tetraethyl lead manufacturing, ceramic and glass industries printing, painting, water piping and other industries can release lead into environment (Mager et al 2011)
Elimination efficiency of lead ion was improved by investigation of effective parameters such as contact time, initial concentration, pH solution and dose of nanoadsorbent
Adsorption process was used as refining technology to remove lead ions from water and wastewater samples by nanostructure adsorbent

Summary

Introduction

Widespread use of lead in various industries such as battery manufacturing, radiation shielding, acid metal plating, ammunition, tetraethyl lead manufacturing, ceramic and glass industries printing, painting, water piping and other industries can release lead into environment (Mager et al 2011). HA is used for different applications such as drug delivery (Pon-On et al 2011; Zhang et al 2010), coating implants (Kold et al 2006) and other biomedical areas (Chen et al 2011a, b) It is an ideal material for removing heavy metals. The egg shells contain natural organic and inorganic compounds, while a large amount of them is discarded as biowaste every day. To recycle them, this biowaste can be used to make effective adsorbents to remove toxins from the water. The flower liked HA, which synthesized from egg shells by microwave oven, was used for lead ion removal from water samples

Methods and materials

Results and discussion

Compliance with ethical standards