Vu Thi Duyen, Nguyen Thi Ni Na and Dinh Van Tac 2019. FABRICATION OF Fe3O4 NANOPATICLE ON COCONUT FIBERS FOR REMOVAL OF HEAVY METALS IN WATER. UED Journal of Social Sciences, Humanities and Education. 9, 4 (Nov. 2019), 20-25. DOI:https://doi.org/10.47393/jshe.v9i4.109.