Removal of Phosphate from Aqueous Solutions Using Chemically Synthesized Vaterite Polymorph of Porous Calcium Carbonate Nanoparticles under Optimized Conditions

Table 1

Conditions used in optimization studies.

Optimizing parameters		Constant parameters
Contact time (CT)	5–120 min	pH -8
		AD: 0.100 g
		IC: 4 mg/L
Adsorbent dosage (AD)	0.025–0.250 g	pH -8
		CT: 30 min
		IC: 4 mg/L
pH	5–12	AD: 0.150 g
		CT: 3 min
		IC: 4 mg/L
Initial concentration (IC: ion chromatography)	2–80 mg/L	pH -8
		AD: 0.150 g
		CT: 30 min