Synthesis of Acrylic Acid Polymer Hydrogel Nano Fe₃O₄ to Remove Ammonia from Sugarcane Field Waste

Table 1

Results of hydrogel preparation.

Test name	Carrageenan weight (g)	The total volume of the solution (ml)	Swell rate (g/g)	Gelling time (min)
A	1	40	153	4
B	1	50	520.41	4.5
C	1	60	632.72	5
D	1	70	991.52	11