Linh, N. 2025. Utilizing pineapple peel crosslinked chitosan as an eco-friendly biosorbent for heavy metal removal: A circular economy perspective. VNUHCM Journal of Earth Science and Environment. 9, 1 (Jul. 2025), 1076-1085. DOI:https://doi.org/https://doi.org/10.32508/stdjsee.v9i1.815.