DC Field | Value | Language |
---|---|---|
dc.contributor.author | Ryu, Hee Wook | ko |
dc.contributor.author | Cho, Kyeoung Suk | ko |
dc.contributor.author | Chang, YongKeun | ko |
dc.contributor.author | Kim, Sang Done | ko |
dc.contributor.author | Mori, Tadahiro | ko |
dc.date.accessioned | 2008-05-26T09:40:43Z | - |
dc.date.available | 2008-05-26T09:40:43Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 1995-03 | - |
dc.identifier.citation | JOURNAL OF FERMENTATION AND BIOENGINEERING, v.80, no.1, pp.46 - 52 | - |
dc.identifier.issn | 0922-338X | - |
dc.identifier.uri | http://hdl.handle.net/10203/4699 | - |
dc.description.abstract | The refinement of low-grade clay, of which impurities are mainly sulfur and iron compounds, is required because of the recent shortage of high-grade clay for manufacturing of structural ceramics. The major impurity compound contained in the low-grade clay we treated was identified as pyrite by X-ray powder diffraction and inductively coupled plasma analyses. The well-formed crystals of pyrite had a framboidal form of 1 mu m-20 mu m diameter. The microbial removal of pyrite from the low-grade clay was investigated by using a sulfur and iron-oxidizing bacterium, Thiobacillus ferrooxidans. About 82-90% of the pyrite was removed in 5-12 d for pulp densities up to 70% (w/v). The removal rate of pyrite ranged from 270 to 914 mg-pyritic sulfur/l . d depending upon clay pulp density. The rate of pyrite removal (r) could be expressed as a function of pyritic sulfur concentration (S): r (mg-pyritic sulfur/l . h)=1.96 x 10(-2) S (mg-pyritic sulfur/l). The logarithm of the amount of oxidized pyrite per unit volume and the final pH in the reaction medium were found to have a linear relationship which could be expressed as pH=2.43-0.55 log [FeS2 (mM)]. With the refined clay no red color due to the presence of pyrite was developed after firing, and its whiteness was similar to that of a high-grade clay. | - |
dc.language | English | - |
dc.language.iso | en_US | en |
dc.publisher | SOC FERMENTATION BIOENGINEERING | - |
dc.subject | PYRITE | - |
dc.subject | EXTRACTION | - |
dc.subject | SHALES | - |
dc.subject | COAL | - |
dc.title | REFINEMENT OF LOW-GRADE CLAY BY MICROBIAL REMOVAL OF SULFUR AND IRON COMPOUNDS USING THIOBACILLUS-FERROOXIDANS | - |
dc.type | Article | - |
dc.identifier.wosid | A1995RM53000009 | - |
dc.identifier.scopusid | 2-s2.0-0029098374 | - |
dc.type.rims | ART | - |
dc.citation.volume | 80 | - |
dc.citation.issue | 1 | - |
dc.citation.beginningpage | 46 | - |
dc.citation.endingpage | 52 | - |
dc.citation.publicationname | JOURNAL OF FERMENTATION AND BIOENGINEERING | - |
dc.embargo.liftdate | 9999-12-31 | - |
dc.embargo.terms | 9999-12-31 | - |
dc.contributor.localauthor | Chang, YongKeun | - |
dc.contributor.localauthor | Kim, Sang Done | - |
dc.contributor.nonIdAuthor | Ryu, Hee Wook | - |
dc.contributor.nonIdAuthor | Cho, Kyeoung Suk | - |
dc.contributor.nonIdAuthor | Mori, Tadahiro | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | LOW-GRADE CLAY | - |
dc.subject.keywordAuthor | MICROBIAL REFINEMENT | - |
dc.subject.keywordAuthor | THIOBACILLUS FERROOXIDANS | - |
dc.subject.keywordPlus | PYRITE | - |
dc.subject.keywordPlus | EXTRACTION | - |
dc.subject.keywordPlus | SHALES | - |
dc.subject.keywordPlus | COAL | - |
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