Arsenic removal from contaminated water by iron oxide sorbents and porous ceramic membranes

Characterization of iron hydroxide/oxide nanoparticles prepared in microemulsions stabilized with cationic/non-ionic surfactant mixtures

“…One interesting observation is that the anharmonicity of the atomic vibration and the asymmetry of the atom pair distribution were found to be larger at the surface of the iron oxide nanoparticles than in the bulk material [1]. There are many applications for iron oxide nanoparticles which include ceramic [2], coatings [3], pigments [4], sorbents [5], gas sensors [6], catalysis [7] and medicine [8,9]. Recent application of iron oxide nanoparticles include resonance imaging [10], DNA purification [11] and as optical power limiting objects [12].…”

Arsenic (III,V) removal from aqueous solution by ultrafine α-Fe2O3 nanoparticles synthesized from solvent thermal method

“…Because of their low cost and affinity to arsenic, various iron oxides, including amorphous hydrous ferric oxide (FeOOH), goethite (␣-FeOOH), and hematite (␣-Fe 2 O 3 ), have been extensively studied in various forms for the removal of arsenic from water [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. Although the amorphous FeOOH and goethite have the high surface areas, which are deemed beneficial to the adsorption process, they are not stable and could easily decompose or form low surface-area crystalline iron oxides during the synthesis and usage, which will greatly reduce their As removal capacity [18].…”

Analytical survey of arsenic in geothermal waters from sites in Kyushu, Japan, and a method for removing arsenic using magnetite

“…Iron-based adsorbents such as zerovalent iron (Krishna et al 2001;Zhang et al 2004;Daus et al 2004;Leupin et al 2005;Bang et al 2005;Tyrovola et al 2006;Cornejo et al 2008), iron (oxy)(hydr)oxides (Wilkie and Hering 1996;Thirunavukkarasu et al 2003a;Sylvester et al 2007;Zaspalis et al 2007;Guan et al 2008;Tuutijärvi et al 2009), and their composites (Joshi and Chaudhuri 1996;Campos 2002;Katsoyiannis and Zouboulis 2002;Thirunavukkarasu et al 2003b;Vaishya and Gupta 2004;Gu and Deng 2007;Mondal et al 2008;Fierro et al 2009) have frequently been used. Manganese (oxy)(hydr)oxides (Bajpai and Chaudhuri 1999), aluminum (oxy)(hydr)oxides (Gregor 2001;Xu et al 2002;Hlavay and Polyák 2005), and titanium dioxides (Fostier et al 2008) can also be used as arsenic adsorbents.…”