l10 samples further both talc and perlite were evaluated but were found to be completely ineffective the results of the evaluation show that all of the samples tested provide turbidity well below the control turbidity of 403 fau the ea3002 at 200 mg l sample provides the lowest turbidity of 4 fau with both ea3002 at 150 mg l and bentolite 865 at 200 mg l having a turbidity of 27 fau total cod was measured in ppm with again all samples coming in significantly below the control of 4300 ppm the bentolite 865 at 200 mg l provided the lowest total cod of 3420 ppm as compared to 3720 ppm for ea3002 at 150 mg l soluble cod also measured in ppm showed the bentolite 865 at 200 mg l provided the lowest soluble cod of 3720 ppm compared to 3690 ppm for ea3002 at 200 mg l and 4710 ppm for the control tss was measured in ppm with the bentolite 865 at 200 mg l having a total of 80 ppm as compared to 44 ppm for ea3002 at 150 mg l and 194 ppm for the control the results show that not all bentonites worked effectively the bentolite 865 is a higher swelling clay and seemed to delaminate more effectively because of significantly higher viscosity than that of bentolite l10 the superior delamination of bentolite 865 is believed to occur because the calcium exchangeable ion exchanges with a sodium ion which weakens the attraction between the plates and thereby increases delamination the bentolite 865 samples performed better than the two control samples in particular particlear sample was used as a commercial control while.