The effect of zeta-potential on the sedimentation behavior of natural stone processing effluent
1
Eskişehir Osmangazi University
2
Dumlupınar University
Publication date: 2013-06-01
Physicochem. Probl. Miner. Process. 2013;49(2):575-586
KEYWORDS
One of the main problems for the natural stone industry is treatment of huge amount of waste sludge resulting from the cutting and polishing of them to produce slabs or tiles. The effective treatment of this sludge is very important for reducing of the sldetailed electrokinetic studies were performed on the travertine samples received as natural and slurry form. The natural form of the sample was supplied from a travertine quarry while the slurry was taken from the cutting and polishing process wastewaterζ of the particles become negative at lower pH values for 1% solid weight content. In contrastfor travertine slurry (6.73% solid weight)different potential variations were determined. The particles were negatively charged between pH 6 and 8. The results highlighted the effect of dissolved specific ions in the waste slurry and sensitivity of ζ to the ionic strength of the solution. The ζ mperformed with different amounts of NaCl additions into the solutionsconfirmed the above findings. An addition of low amounts of NaCl decreases ζ of the solid surface. Finallythe ζ measurements in the presence of polymer concentration of 0.001% to 0.1 % (wt/vol) clearly indicated that the flocculant molecules are adsorbed extensively on the travertine particlesand increase the surface potential of the particles with increasing reagent concentration
ABSTRACT
travertine, environment, stone industry, zeta potential
| eISSN: | 2084-4735 |
| ISSN: | 1643-1049 |
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