Abstract:
This research focus on fabrication of water filtering aid from activated carbon and activated rice husk charcoal/zeolite/zinc oxide composite ceramics by slip casting method. In the first part of experiment, the slip was prepared from the mixture of 17.37% of zeolite NaA, 17.37% of activated carbon, 0.35% of ZnO nanoparticles, 8.77% of phenolic resin, 0.55% carboxymethyl cellulose and 55.59% of water. The slip was mixed in a rapid ball mill (450 rpm) for 15, 30, 45 and 60 minutes and was then poured into plaster molds for 3 hours in order to maintain hollow casting. The green body was dried and fired at several firing temperature of 600, 650, 700 and 750 oC for 1 hour in reduction atmosphere. Samples fired at 700 oC with different milling time (15, 30, 45 and 60 minutes) show good mechanical strength which are 2.59 2.99 3.48 and 3.47 MPa, respectively. Sample fired at 700 oC with milling time 30 minutes has efficiency of water filtration 0.14 L/min, water softening 31.78 %, adsorb free chlorine and antibacterial 100%. In the second part of experiment, The slip was prepared from the mixture of 37.86% of zeolite NaA and carbon composite, 0.38% of ZnO nanoparticles, 9.56% of phenolic resin, 0.72% of carboxymethyl cellulose and 51.48% of water. The slip casting process is the same as in the first part of experiment. It was found that desirable mechanical strength is 4.13 MPa which can be obtained from the sample fired at 650 oC and milling time of 30 minutes (Water filtration 0.16 L/min, Adsorb free chlorine 100%).