%0 Journal Article
%T Review: Low Cost, Environmentally Friendly Humic Acid Coated Magnetite Nanoparticles (HA-MNP) and Its Application for the Remediation of Phosphate from Aqueous Media
%A Tadewos Damena
%A Tajeldin Alansi
%J Journal of Encapsulation and Adsorption Sciences
%P 256-279
%@ 2161-4873
%D 2018
%I Scientific Research Publishing
%R 10.4236/jeas.2018.84013
%X Phosphate is a primary nutrient required for the normal functioning of
many organisms in the ecosystem. However, presence of excess phosphate into the
aquatic systems leads to eutrophication which can promote harmful algal growth
and decrease the amount of dissolved oxygen in water. Municipal, industrial and
agricultural run-off wastewaters are the major point sources for phosphate
discharges. There are different methods to remove phosphates from water. Among
these, adsorption is the most widely accepted method for phosphate removal
because of its high efficiency, minimum cost, easy and simple operation and
applicability at lower concentrations. The emphasis of this review, is to
consolidate low cost, environmentally friendly humic acid coated magnetite nanoparticles
(HA-MNP) and its application for the remediation of phosphate from aqueous
media. The magnetic nanoparticles could be easily separated from the reaction
mixture by using a simple hand held magnet and adsorption studies demonstrate
the fast and effective separation of phosphate with maximum removal efficiency<span><span><span style=\"font-family:;\" \"=\"\"> </span></span></span><span style=\"font-family:Verdana;\"><span style=\"font-family:Verdana;\"><span style=\"font-family:Verdana;\">&gt;</span></span></span><span><span><span style=\"font-family:;\" \"=\"\"> </span></span></span><span style=\"font-family:Verdana;\"><span style=\"font-family:Verdana;\"><span style=\"font-family:Verdana;\">90%</span></span></span><span><span><span style=\"font-family:;\" \"=\"\"> </span></span></span><span style=\"font-family:Verdana;\"><span style=\"font-family:Verdana;\"><span style=\"font-family:Verdana;\">at pH
6.6. The adsorption behavior follows the Freundlich isotherm and the removal of
phosphate </span></span></span><span style=\"font-family:Verdana;\"><span style=\"font-family:Verdana;\"><span style=\"font-family:Verdana;\">is </span></span></span><span><span><span style=\"font-family:;\" \"=\"\"><span style=\"font-family:Verdana;\">found higher at acidic and neutral pH compared to basic conditions. The
nanoparticles exhibit good selectivity and adsorption efficiency for phosphate
in the presence of co-existing ions such as Cl</span><sup><span style=\"font-family:Verdana;\">-</span></sup><span style=\"font-family:Verdana;\">, </span></span></span><span><span><span style=\"font-family:;\" \"=\"\"><span style=\"font-family:Verdana;\"><img src=\"Edit_f2a52d99-5e91-4713-a289-7f8c013971ba.bmp\" alt=\"\" /></span></span></span></span><span><span><span style=\"font-family:;\" \"=\"\"><span
%K Phosphates
%K Magnetite Nanoparticle
%K Humic Acid &amp
%K Humic Acid Coated Magnetite Nanoparticle
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=89280