| Autor: |
Hoa NV; Faculty of Food Technology, Nha Trang University, Nha Trang 650000, Vietnam., Minh NC; Institute for Biotechnology and Environment, Nha Trang University, Nha Trang 650000, Vietnam., Cuong HN; Faculty of Biotechnology, Binh Duong University, Thu Dau Mot 55000, Vietnam., Dat PA; Faculty of Food Technology, Nha Trang University, Nha Trang 650000, Vietnam., Nam PV; Faculty of Fishery, Ho Chi Minh City University of Food Industry, Ho Chi Minh City 70000, Vietnam., Viet PHT; Faculty of Chemistry, Da Lat University, Dalat 670000, Vietnam., Phuong PTD; Faculty of Food Technology, Nha Trang University, Nha Trang 650000, Vietnam., Trung TS; Faculty of Food Technology, Nha Trang University, Nha Trang 650000, Vietnam. |
| Abstrakt: |
Dye and heavy metal contaminants are mainly aquatic pollutants. Although many materials and methods have been developed to remove these pollutants from water, effective and cheap materials and methods are still challenging. In this study, highly porous hydroxyapatite/graphene oxide/chitosan beads (HGC) were prepared by a facile one-step method and investigated as efficient adsorbents. The prepared beads showed a high porosity and low bulk density. SEM images indicated that the hydroxyapatite (HA) nanoparticles and graphene oxide (GO) nanosheets were well dispersed on the CTS matrix. FT-IR spectra confirmed good incorporation of the three components. The adsorption behavior of the obtained beads to methylene blue (MB) and copper ions was investigated, including the effect of the contact time, pH medium, dye/metal ion initial concentration, and recycle ability. The HGC beads showed rapid adsorption, high capacity, and easy separation and reused due to the porous characteristics of GO sheets and HA nanoparticles as well as the rich negative charges of the chitosan (CTS) matrix. The maximum sorption capacities of the HGC beads were 99.00 and 256.41 mg g -1 for MB and copper ions removal, respectively. |
