eng Oriental Scientific Publishing Company Biosciences Biotechnology Research Asia 0973-1245 2016-02-01 4 1 259 266 5723 article Animaesh Kumar Mishra 1 D.P. Pandey 1 Department of chemistry, Satish Chandra College, Ballia - 277 001 (India) Experimental results of the study on the effect of variation of pH of slurry on zeta potential by the polymeric flocculants (HPAM, and Truefloc) during the flocculation of East Busseriya, Sudamdih and Singrauli coals of Jharia coalfields are reported. These results suggest that zeta potential greatly affects the flocculation behavior of coalfines as evidenced by higher settling rates at higher pH value. Zeta potential values are highly dependent on pH of the slurry and any change in pH alters the zeta potential value significantly. The highest zeta potential value is obtained in the pH, ranging between 6.0 and 7.0, which is also the range for maximum settling rate. The results of flocculation of coal particles have been explained on the basis of the ‘bridging mechanism’. https://www.biotech-asia.org/vol4no1/studies-on-the-effect-of-ph-of-slurry-on-zeta-potential-during-the-flocculation-of-some-indian-bituminous-coals/ Slurry; zeta potential; flocculation; Indian Bituminous coals