Linked Life Data

21229742

Source:http://linkedlifedata.com/resource/pubmed/id/21229742

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
10
pubmed:dateCreated
2011-1-13
pubmed:abstractText
Under the sunlight irradiation, the four common trace pollutants such as metronidazole, diclofenac, sulfamethoxazole and ibuprofen were degradated and mineralized by the hydroxyl radical (*OH) generated from decomposition of H2O2 catalyzed by ferrioxalate (FeOx), and the toxicity of the water solution containing degradated products and intermediates were evaluated. The factors affecting the removal of the TOC, such as the initial concentration of H2O2, FeOx, and the pH, were investigated through an indicator of total organic carbon. The disappearing rate of pollutants in aqueous solution was explained according to the chemical structure of the pharmaceuticals; the biotoxicity of the pharmaceuticals and the intermediates were evaluated by EC50 value of pharmaceutical solution to the Chlorella. The appropriate operating conditions were achieved at pH 3 with initial concentrations of 300 mg x L(-1) H2O2 and 75 mg x L(-1) FeOx at the conditions such as the initial concentration of four drugs were 20 mg x L(-1), respectively. The order of the degradation rate for the pharmaceuticals is metronidazole > ibuprofen > sulfamethoxazole > diclofenac. During the reaction, the biological toxicity increases with time and then decreases rapidly, along with appearance and disappearance of intermediates. Finally, a model on reaction mechanism was proposed, where Solar/FeOx/H2O2 system was used for the degradation of the pharmaceuticals with low concentration in aqueous solution.
pubmed:language
chi
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0250-3301
pubmed:author
pubmed:issnType
Print
pubmed:volume
31
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2336-43
pubmed:meshHeading
pubmed:year
2010
pubmed:articleTitle
[Degradation of the mixed pharmaceuticals with low concentration in aqueous by solar/ferrioxalate system and process evaluation through toxicity bioassay].
pubmed:affiliation
Department of Environmental and Municipal Engineering, Tianjin Institute of Urban Construction, Tianjin 300384, China. zhenhu.xiong@126.com
pubmed:publicationType
Journal Article, English Abstract, Research Support, Non-U.S. Gov't