Activated carbon pre-filters are commonly\nused for water purification. This activated carbon offers huge internal surface\narea and hence, is a good adsorbent of many contaminants found in drinking\nwater. Activated carbon is usually produced from petroleum-based residues,\npeat, coal and coconut shells. Carbonaceous materials mostly have internal\nsurface area and porosity in the range of 10-15 m2\/g. But, activated carbons have\ninternal surface in the range of 1000-1200 m2\/g because the process of\nactivation enhances this area. <\/p>\n\n\n\n
The process of activation generates networking of minutes pores of diverse diameters on the surface of the carbon. In water purifier, water used this extended internal surface. Activated carbon<\/a> is capable of removing organic contaminants like herbicides, pesticides and other disinfection from Tri halo methane and so on. <\/p>\n\n\n\n Why is coconut shell activated carbon\na preferred choice for water purification?<\/em><\/strong><\/p>\n\n\n\n Around 85 to 90% surface area of coconut\nshell activation carbon has pores in the range of <4nm, that is, micro\npores. The size of the small pores is similar to size of contaminant molecules found\nin drinking water. Therefore, this carbon can effectively trap the contaminants.\nOn the other hand, activated carbon produced from wood and peat mostly has macro\nand meso pores which are suitable for trapping bigger molecules. Again, the\ncoal carbons have pores between wood and coconut shell carbons. <\/p>\n\n\n\n Of these three kinds of pores structures, micro\npores are the most effective. Now, there are certain advantages of coconut\nshell activation carbon. <\/p>\n\n\n\n