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A novel adsorbents NC-PEG, obtained by the modification of nanocellulose (NC)   with PEG-6-arm amino polyethylene glycol (PEG-NH2) via maleic anhydride (MA)   linker, was used for the removal of Cd2+ and Ni2+ from water. Subsequent   precipitation of goethite (FO) on NC-PEG produced NC-PEG/FO adsorbent which   was used for As(V) and As(III) removal. In a batch test, the influence of   pH, contact time, initial ion concentration and temperature on adsorption   efficiency were studied. The maximum adsorption capacities found for Cd2+   and Ni2+, obtained by the use of Langmuir model, were 37.9 and 32.4 mg g−1   at 25 °C, respectively. Also, high As(V) and As(III) removal capacity of   26.0 and 23.6 mg g-1 were obtained. Thermodynamic parameters indicate   endothermic, feasible and spontaneous nature of adsorption process. Kinetic   study, i.e. fitting by Weber-Morris model predicted intra-particle diffusion   as a rate-controlling step. Multi-cycle reusability of both NC-PEG and   NC-PEG/FO, significantly affects the affordability of techno-economic   indicators for consideration of their possible application. [Ministry of   Education, Science and Technological developments of the Republic of Serbia,   Project No. 172013, and University of Defence, Republic of Serbia, project   VA-TT/4/16-18

Efficient pollutants removal by amino-modified nanocellulose impregnated with iron oxide