A systematic study of chromium solubility in the presence of organic matter: Consequences for the treatment of chromium-containing wastewater

Remoundaki, E; Hatzikioseyian, A; Tsezos, M

dc.contributor.author	Remoundaki, E	en
dc.contributor.author	Hatzikioseyian, A	en
dc.contributor.author	Tsezos, M	en
dc.date.accessioned	2014-03-01T01:25:51Z
dc.date.available	2014-03-01T01:25:51Z
dc.date.issued	2007	en
dc.identifier.issn	0268-2575	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/17768
dc.subject	Adsorption	en
dc.subject	Bioprecipitation	en
dc.subject	Bioreactor	en
dc.subject	Hexavalent chromium	en
dc.subject	Organic matter	en
dc.subject	Solubility	en
dc.subject	Trivalent chromium	en
dc.subject.classification	Biotechnology & Applied Microbiology	en
dc.subject.classification	Chemistry, Multidisciplinary	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.other	Adsorption	en
dc.subject.other	Biological sewage treatment	en
dc.subject.other	Bioreactors	en
dc.subject.other	Chromium	en
dc.subject.other	Solubility	en
dc.subject.other	Bioprecipitation	en
dc.subject.other	Hexavalent chromium	en
dc.subject.other	Trivalent chromium	en
dc.subject.other	Wastewater treatment	en
dc.subject.other	acetic acid	en
dc.subject.other	alanine	en
dc.subject.other	albumin	en
dc.subject.other	ascorbic acid	en
dc.subject.other	aspartic acid	en
dc.subject.other	casein	en
dc.subject.other	chromium derivative	en
dc.subject.other	citric acid	en
dc.subject.other	coordination compound	en
dc.subject.other	ligand	en
dc.subject.other	organic matter	en
dc.subject.other	oxalic acid	en
dc.subject.other	peptone	en
dc.subject.other	Adsorption	en
dc.subject.other	Biological sewage treatment	en
dc.subject.other	Bioreactors	en
dc.subject.other	Chromium	en
dc.subject.other	Solubility	en
dc.subject.other	Wastewater treatment	en
dc.subject.other	article	en
dc.subject.other	bioreactor	en
dc.subject.other	effluent	en
dc.subject.other	industrial waste	en
dc.subject.other	nutrient	en
dc.subject.other	quantitative analysis	en
dc.subject.other	solubility	en
dc.subject.other	waste component removal	en
dc.subject.other	waste water management	en
dc.subject.other	water contamination	en
dc.subject.other	water content	en
dc.subject.other	yeast	en
dc.title	A systematic study of chromium solubility in the presence of organic matter: Consequences for the treatment of chromium-containing wastewater	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/jctb.1742	en
heal.identifier.secondary	http://dx.doi.org/10.1002/jctb.1742	en
heal.language	English	en
heal.publicationDate	2007	en
heal.abstract	The treatment objective for wastewater containing Cr(VI) and/or Cr(III) is the reduction of Cr(VI) to the less toxic Cr(III) and the sequestering of Cr(III) from the water streams. The presence of organic matter in the wastewater and in a bioreactor environment may alter the solubility behavior of Cr(III), resulting in poor sequestering and Cr(III) removal from the soluble phase. Systematic experimental solubility results for Cr(III) were obtained in the presence of organic molecules often encountered in industrial effluents containing chromium as well as in biological treatment systems. Chromium solubility curves were determined experimentally from synthetic solutions of Cr(III) in contact with organic acids (acetic, oxalic, citric and ascorbic), amino acids (alanine and aspartic), proteins (albumin and casein) and synthetic nutrient media (yeast extract, nutrient broth and peptones). Experimental data sets were generated for each one of the above organics at three different initial organics concentrations in order to quantify the role of the relative abundance of organic matter in the solubility behavior of Cr(III). A progressive increase of trivalent chromium solubility was systematically observed when the relative abundance of organic ligands to Cr(III) exceeds 10, indicating the existence of a threshold above which the solubility of Cr(III) increases significantly. The hexacoordinate and octahedral character of Cr(III) complexes may explain the need for ligand excess also pointing to a treatment strategy suggesting the relative abundance of organic moieties should be kept below the above threshold. (C) 2007 Society of Chemical Industry.	en
heal.publisher	JOHN WILEY & SONS LTD	en
heal.journalName	Journal of Chemical Technology and Biotechnology	en
dc.identifier.doi	10.1002/jctb.1742	en
dc.identifier.isi	ISI:000249177400004	en
dc.identifier.volume	82	en
dc.identifier.issue	9	en
dc.identifier.spage	802	en
dc.identifier.epage	808	en