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- Iron_oxide_adsorption abstract "Iron oxide adsorption is a water treatment process that is used to remove arsenic from drinking water. Arsenic is a common natural contaminant of well water and is highly carcinogenic. Iron oxide adsorption treatment for arsenic in groundwater is a commonly practiced removal process which involves the chemical treatment of arsenic species such that they adsorb onto iron oxides and create larger particles that may be filtered out of the water stream.The addition of ferric chloride, FeCl3, to well water immediately after the well at the influent to the treatment plant creates ferric hydroxide, Fe(OH)3, and hydrochloric acid, HCl. 3H2O + FeCl3 → Fe(OH)3 + 3HClFe(OH)3 in water is a strong adsorbent of arsenate, As(V), provided that the pH is low. HCl lowers pH, assuring arsenic adsorption, and the disassociated chlorine oxidizes iron in solution from Fe+2 to Fe+3, which then may bond with hydroxide ions, OH−, thus creating more adsorbent.This adjustment also lowers the pH of the well water, decreasing alkalinity and allowing more cationic species such Fe(+) or As(+) as to exist freely within the flow. Low pH also decreases the solubility of some iron and arsenic species as well as increasing the adsorptive reactivity of arsenate, As(V).Additional oxidation of Fe+2 to Fe+3, also referred to as iron(II) and iron(III), is induced by the addition of sodium hypochlorite, NaOCl, at the well head. NaOCl is usually added for disinfection although it may be used in this case towards the objectives of a distribution system free chlorine residual of 1 mg/L and the oxidation of aqueous As(III) to As(V), and aqueous iron Fe+2 to Fe+3, which will bond with hydroxide for further adsorption.The filter media usually consists of anthracite, iron-manganese oxidizing sand, and garnet sand over support gravel.".
- Iron_oxide_adsorption wikiPageID "13522371".
- Iron_oxide_adsorption wikiPageLength "2269".
- Iron_oxide_adsorption wikiPageOutDegree "16".
- Iron_oxide_adsorption wikiPageRevisionID "646724311".
- Iron_oxide_adsorption wikiPageWikiLink Adsorption.
- Iron_oxide_adsorption wikiPageWikiLink Anthracite.
- Iron_oxide_adsorption wikiPageWikiLink Arsenic.
- Iron_oxide_adsorption wikiPageWikiLink Carcinogen.
- Iron_oxide_adsorption wikiPageWikiLink Category:Water_treatment.
- Iron_oxide_adsorption wikiPageWikiLink Disinfectant.
- Iron_oxide_adsorption wikiPageWikiLink Drinking_water.
- Iron_oxide_adsorption wikiPageWikiLink Filtration.
- Iron_oxide_adsorption wikiPageWikiLink Flocculation.
- Iron_oxide_adsorption wikiPageWikiLink Garnet.
- Iron_oxide_adsorption wikiPageWikiLink Gravel.
- Iron_oxide_adsorption wikiPageWikiLink Iron(III)_chloride.
- Iron_oxide_adsorption wikiPageWikiLink Iron_oxide.
- Iron_oxide_adsorption wikiPageWikiLink Sodium_hypochlorite.
- Iron_oxide_adsorption wikiPageWikiLink Water_treatment.
- Iron_oxide_adsorption wikiPageWikiLink Water_well.
- Iron_oxide_adsorption wikiPageWikiLinkText "Iron oxide adsorption".
- Iron_oxide_adsorption subject Category:Water_treatment.
- Iron_oxide_adsorption hypernym Process.
- Iron_oxide_adsorption type Election.
- Iron_oxide_adsorption type Technology.
- Iron_oxide_adsorption comment "Iron oxide adsorption is a water treatment process that is used to remove arsenic from drinking water. Arsenic is a common natural contaminant of well water and is highly carcinogenic.".
- Iron_oxide_adsorption label "Iron oxide adsorption".
- Iron_oxide_adsorption sameAs Q6073003.
- Iron_oxide_adsorption sameAs m.03c8432.
- Iron_oxide_adsorption sameAs Q6073003.
- Iron_oxide_adsorption wasDerivedFrom Iron_oxide_adsorption?oldid=646724311.
- Iron_oxide_adsorption isPrimaryTopicOf Iron_oxide_adsorption.