Title of article :
The effect of nature of raw coal on the adhesion of bacteria to coal surface
Author/Authors :
Raichur، نويسنده , , A.M. and Vijayalakshmi، نويسنده , , S.P، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2003
Pages :
7
From page :
225
To page :
231
Abstract :
The surface properties of coal and solution pH play a major role in determining the adhesion of microorganisms. In this study, three Indian coal samples with different compositions have been used and the adhesion of the bacterium Bacillus polymyxa to these coals has been investigated. It was found that due to the high ash content of coal, the zeta-potential was negative over most of the pH range which is close to the values exhibited by pure quartz as well as B. polymyxa. Similarly, the surface free energy components of coal (derived from contact angle measurements) showed that the electron-donor component increased with ash content. Adhesion experiments revealed that maximum adhesion of the bacterium B. polymyxa occurred on to the coal samples around the point-of-zero-charge of the coal and the bacterium i.e. about pH 2. Further, adhesion was found to be dependent on the ash content and the surface free energy of the coals.
Keywords :
Coal , ash , Contact angle , Bacillus polymyxa , Adhesion
Journal title :
Fuel
Serial Year :
2003
Journal title :
Fuel
Record number :
1462960
Link To Document :
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