“Preparation of Pellet Biopolymer Polyvinyl Alcohol Alginate Gluataraldehyde Impregnated With Banana Peel Activated Carbon (BPAC)”. Gravitasi, vol. 21, no. 2, Dec. 2022, pp. 65-68, https://doi.org/10.22487/gravitasi.v21i2.16039.