%0 Journal Article
%T Removing Iron Ions Contaminants from Groundwater Using Modified Nano-Hydroxyapatite by Nano Manganese Oxide
%A Mohammed Abd-El-Aal Ahmed Ayash
%A Tarek Ahmed Seaf Elnasr
%A Madiha Hassan Soliman
%J Journal of Water Resource and Protection
%P 789-809
%@ 1945-3108
%D 2019
%I Scientific Research Publishing
%R 10.4236/jwarp.2019.116048
%X In this article, we study modified nano-hydroxyapatite (HAp) by nano manganese oxide (Mn<sub>3</sub>O<sub>4</sub>) as adsorbent material to remove iron ions from groundwater. Different parameters were studied to option optimum conditions of removing such as contact time, pH, initial concentration, a dosage of adsorbent, agitation speed and temperature. Kinetics studies included first order (<i>R</i><sup>2</sup> = 0.915), pseudo-first order (<i>R</i><sup>2</sup> = 0.936), second order (<i>R</i><sup>2</sup> = 0.948), pseudo-second order (<i>R</i><sup>2</sup> = 0.995), Elovich equation model (<i>R</i><sup>2</sup> = 0.977), intraparticle diffusion (<i>R</i><sup>2</sup> = 0.946), Natarajan and Khalaf (<i>R</i><sup>2</sup> = 0.915) were carried out, the obtained results revealed that the pseudo-second order is the best to describe the adsorption process because the correlation coefficient is approaching one (<i>R</i><sup>2</sup> = 0.995). Adsorption isotherm was calculated by using Freundlich, Langmuir and Temkin constants, adsorption capacity from Langmuir model was 0.606 mg/g. Thermodynamic parameters (жд<i>G</i>, жд<i>H</i> = &#8722;51 KJ/mol, and жд<i>S</i> = &#8722;142 (KJ/mol)) for the adsorption process were also calculated and discussed.
%K Groundwater
%K Adsorption
%K Nano Materials
%K Hydroxyapatite
%K Manganese Oxide
%K Iron Ions
%K Kinetic
%K Thermodynamic
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=93420