Phosphorus Removal from Wastewater Using Oven-Dried Alum Sludge

Table 3

Physical properties of activated carbon.

Item name	Granulated activated carbon
Base	Coconut shell
Apparent density (kg/m^3)	480–490
Bulk density (kg/m^3)	770
BET surface area (m^2/g)	1000
Particle porosity	0.5
Bed porosity	0.4
Ash content (%)	5 (max)
Iodine number ( mg/g)^*	1100–1130
pH^**	10.2–10.6

^*The iodine number refers to the milligrams of a 0.02 normal iodine solution per gram of GAC during a standard test (ASTM D4607).
^**The pH of a solution of distilled water with a specific dosage of GAC according to a standard test (ASTM D3838).