http://rdf.ncbi.nlm.nih.gov/pubchem/patent/BR-102012009197-A2
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8257ad60ee47fd2d2c2213f1a704dfe2 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B25-01 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B26-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C12N1-20 |
| classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C12R1-01 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B25-01 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C12N1-20 |
| filingDate | 2012-03-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_13531eeecb94e389bd668ebc601061d6 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_57cc06ee5ce0a65804b598f9237b10e8 |
| publicationDate | 2013-06-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | BR-102012009197-A2 |
| titleOfInvention | adsorbing agent, bioflotting composition and apatite-quartz system bioflotting process |
| abstract | BIOAdSorbent. Several microorganisms such as bacteria, fungi and / or their metabolic products have been used as bioreactors in mineral bioprocessing. A hydrophobic microorganism can change the hydrophilic characteristics of a mineral surface if it adheres to the mineral surface. This is the case of the bacteria Rhodoccocus opacus, with hydrophobic characteristics identified in previous research. In this work we study the electrophoretic behavior and microflotation of quartz - apatite mineral system (apatite "A" and apatite "B") after interaction with bacteria cells. The results showed a change in the zeta potential profile of mineral samples after interaction with the bacteria, this change was more significant in apatites than quartz. The results also showed that bacterial cell adhesion on the mineral surface can be through specific interactions as well as electrostatic interactions. It has been observed that the suspended bacteria can reduce the surface tension of the air / water interface from 70 mN / m to close to 54 mN / m, 55 mN / m and 56 mN / m for pH values of 3.5, and 7, pH range in which the highest foam production was observed. The maximum buoyancy value for all mineral samples was obtained at a pH around 5; apatite "B" achieved around 90% flotability using 0.15 g / L bacteria and 5 minutes of flotation, while apatite "A" needed 0.20 g / L bacteria to achieve the same recovery, finally in the case of quartz the value was close to 13% with 0.15 g / L bacteria and under the same working conditions. The adaptation of the bacteria to mineral substrate revealed a change in the behavior of the bacteria during the flotation process, a greater apatite flotability was observed at a pH value around 3 after adaptation to the apatite mineral. In the case of quartz, there was a slight increase in flotability at all pH values. Apatite and quartz bioflotation follows first-order kinetic models. The rate constants (K ~ 1 ~) of apatite flotation "A" were observed to decrease with particle size reductions, changing from 0.429 (min ^ -1 ^) to 0.198 (min ^ -1 ^) when size went from (106 - 150) one to (38 - 75) one, in the case of apatite "B" this reduction was from 0.518 (min ^ -1 ^) to 0.295 (min ^ -1 ^), the opposite was observed in the case of quartz increased from 0.016 min ^ -1 ^ to 0.11 min ^ -1 ^. Fundamental studies of electrophoretic mobility and flotability supported by scanning electron microscopy showed the selectivity of apatite and quartz separation and thus rectified the potential use of Rhodococcus opacus bacteria as bioreactor in mineral processing. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2018209416-A1 |
| priorityDate | 2012-03-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 53.