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Flocculation of diatomite by methylated milk casein in seawater
- Source :
-
Journal of Colloid & Interface Science . Feb2004, Vol. 270 Issue 2, p359. 5p. - Publication Year :
- 2004
-
Abstract
- A new biodegradable flocculant was prepared from a common and inexpensive protein. Milk casein was methylated in a 0.05 M HCl methyl alcohol solution at room temperature. The methylated milk casein (MeCS), having a methylation degree of 81%, was applied to the separation or flocculation of diatomite in seawater (pH <f>8.1±0.1</f>) at room temperature (18–23 °C). The flocculating ability of MeCS was evaluated by a sedimentation balance method (cumulative measurement method). The diatomite suspension was effectively flocculated by the addition of a small amount of MeCS (0.25 wt% of the diatomite weight). The results of sedimentation analysis showed that the size–frequency curve had a very sharp and high peak; thus the diatomite floc formed by MeCS had a rather uniform size. The settling velocity of diatomite floc at the appropriate MeCS dosages (0.25–2 wt% of diatomite) was about <f>3×10−3</f> m s<f>−1</f>. [Copyright &y& Elsevier]
- Subjects :
- *FLOCCULANTS
*DIATOMACEOUS earth
*CASEINS
*METHANOL
Subjects
Details
- Language :
- English
- ISSN :
- 00219797
- Volume :
- 270
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Journal of Colloid & Interface Science
- Publication Type :
- Academic Journal
- Accession number :
- 11733794
- Full Text :
- https://doi.org/10.1016/j.jcis.2003.09.025