Linked Life Data

19699031

Source:http://linkedlifedata.com/resource/pubmed/id/19699031

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2-3
pubmed:dateCreated
2009-11-2
pubmed:abstractText
Bioleaching processes were used to mobilize metals from printed wire boards (PWBs). The bacteria Acidithiobacillus ferrooxidans (A. ferrooxidans) and Acidithiobacillus thiooxidans (A. thiooxidans) isolated from an acidic mine drainage were grown and acclimated in presence of PWBs and then used as bioleaching bacteria to solubilize metals from PWBs. The experimental results demonstrate that all the percentages of copper, lead, zinc solubilized into the leaching solution from actual PWBs basically increased with decrease of sieve fraction of sample and decrease of PWBs concentration. The concentration of PWBs should be controlled under the range from 7.8 to 19.5 g l(-1). Under 7.8 g l(-1) of the concentration of PWBs, the percentages of copper solubilized are 99.0%, 74.9%, 99.9% at 0.5-1.0mm of sieve fraction at 9 d of leaching time by the pure culture of A. ferrooxidans, the pure culture of A. thiooxidans, and mixed culture of A. ferrooxidans and A. thiooxidans, respectively, while the percentages of copper, lead and zinc solubilized are all more than 88.9% at <0.35 mm of the sieve fractions of sample at 5d of leaching time by the above three kinds of cultures. Variation of pH and redox potential of leaching solution with time implied that Fe(3+) oxidized from Fe(2+) in the culture medium in presence of A. ferrooxidans caused the mobilization of metals. It is concluded that A. ferrooxidans and A. thiooxidans were able to grow in the presence of PWBs and the pure culture of A. ferrooxidans, and the mixed culture of A. ferrooxidans and A. thiooxidans can not only efficiently bioleach the main metal copper but also bioleach other minor metals such as lead, zinc as well.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
1873-3336
pubmed:author
pubmed:issnType
Electronic
pubmed:day
30
pubmed:volume
172
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1100-5
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
Bioleaching of metals from printed wire boards by Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans and their mixture.
pubmed:affiliation
School of Urban Development and Environmental Engineering, Shanghai Second Polytechnic University, 201209 Shanghai, People's Republic of China.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't