Strontium Oxide Decorated Iron Oxide Activated Carbon Nanocomposite: A New Adsorbent for Removal of Nitrate from Well Water

Mohammad Nodeh,Aliakbar Masoudi,Gholamreza Bidhendi,Behrouz Akbari-Adergani,Mohammad Gabris,Hamid Nodeh,Syed Shahabuddin

doi:10.21577/0103-5053.20190138

Mohammad Nodeh, Aliakbar Masoudi + Show 5 more

Open Access

https://doi.org/10.21577/0103-5053.20190138

Copy DOI

Abstract

In the present study, activated carbon was magnetized by iron oxide and modified by strontium based nanoparticles (FeAC@Sr) to introduce it as an efficient favorable adsorbent for the removal of nitrate ions from underground water. The decorated adsorbent was characterized in terms of size, structure, morphology and composition using scanning electron microscopy, Fourier-transform infrared spectroscopy and energy dispersive X-ray spectroscopy. The equilibrium adsorption data were well fitted and explained by Langmuir isotherm with a maximum adsorption capacity of 87.42 mg g-1 (theoretical value calculated from the Langmuir isotherm model). Regarding adsorption kinetic it was seen that it is fit for pseudo-second-order process with an equilibrium state which was reached at pH 4.0 in 90 min. The results also revealed that the incorporation of positively charged strontium and iron oxide into the activated carbon has triggered removal efficiency for the negatively charged nitrate ions.

Highlights

The presence of some organic and inorganic compounds in water is a crucial factor affecting water quality
A simple and novel nanocomposite based on iron oxide doped activated carbon and strontium oxide (FeAC@strontium nanoparticles (Sr)) was synthesized and applied for the removal of nitrate ions from well water
Where qe is the equilibrium adsorption capacity, qm is the maximum adsorption capacity to complete a single layer, Ce is the concentration of unabsorbed nitrate in solution after adsorption, kL is Langmuir constant (L mg-1), KF is Freundlich constant related to the potential of the adsorbent for up taking nitrate [(mg g-1) (L mg-1)1/n] and 1/n is a constant describing the energy barrier for adsorption and its feasibility.[40]

Summary

Introduction

The presence of some organic and inorganic compounds in water is a crucial factor affecting water quality. A simple and novel nanocomposite based on iron oxide doped activated carbon and strontium oxide (FeAC@Sr) was synthesized and applied for the removal of nitrate ions from well water.

Results

Conclusion