Biomimetic Synthesis of Hydroxyapatite in Presence of Imidazole-4,5-dicarboxylic Acid Grafted Chitosan for Removing Chromium(VI)

Table 3

Analysis of variance.

Source of variation	SS	df	MS	F	Significance
pH value	211.18	3	70.39	10.20
Initial concentration of Cr(VI)	54.30	3	18.10	2.62
Dosage of HAP	489.07	3	163.02	23.63
Adsorption time	11.12	3	3.71	0.54
Error	20.70	3	6.90	—
Total	786.37	15	—	—

F0.05 (3, 3) = 9.28; F0.01 (3, 3) = 29.46; a significant influencing factors.