| Autor: |
Choudhary D; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India. archanaspaper@gmail.com.; Centre for Advanced Radiation Shielding and Geopolymeric Materials, CSIR-Advanced Materials and Processes Research Institute, Bhopal, 462026, India., Singh A; Centre for Advanced Radiation Shielding and Geopolymeric Materials, CSIR-Advanced Materials and Processes Research Institute, Bhopal, 462026, India., Giri A; Centre for Advanced Radiation Shielding and Geopolymeric Materials, CSIR-Advanced Materials and Processes Research Institute, Bhopal, 462026, India., Prasad HC; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India. archanaspaper@gmail.com.; Centre for Advanced Radiation Shielding and Geopolymeric Materials, CSIR-Advanced Materials and Processes Research Institute, Bhopal, 462026, India., Sharma RK; Technical Physical Division, Bhabha Atomic Research Center Trombay, Mumbai, 400085, India., Mishra A; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India. archanaspaper@gmail.com.; Centre for Advanced Radiation Shielding and Geopolymeric Materials, CSIR-Advanced Materials and Processes Research Institute, Bhopal, 462026, India., Singhai S; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India. archanaspaper@gmail.com.; Centre for Advanced Radiation Shielding and Geopolymeric Materials, CSIR-Advanced Materials and Processes Research Institute, Bhopal, 462026, India., Singh A; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India. archanaspaper@gmail.com.; Centre for Advanced Radiation Shielding and Geopolymeric Materials, CSIR-Advanced Materials and Processes Research Institute, Bhopal, 462026, India. |
| Abstrakt: |
Occurrence of fluoride in groundwater is a serious concern due to its fatal effects. Functionalized hexagonal boron nitride sheets have been combined with nickel hydroxide nanoparticles by a one step process and a hybrid adsorbent Ni(OH) 2 @hBN has been developed with an exceptionally high fluoride adsorption capacity of 365 mg g -1 , higher than those of Ni(OH) 2 and hBN. This maximum adsorption capacity is higher than those of most common adsorbents used for defluoridation including activated alumina, reported nickel oxide and carbon-based 2D material-supported alumina adsorbents. The presence of functionalized boron nitride significantly increased the surface area to 680 m 2 g -1 with a pore volume of 0.33687 cm 3 g -1 and provided rich hydroxyl group-containing surface sites for the removal of fluoride present in contaminated water. In addition, the adsorption of fluoride onto boron nitride-modified nickel hydroxide followed pseudo-second-order kinetics and the equilibrium data fitted well with the Langmuir adsorption isotherm, suggesting a monolayer adsorption mechanism. Furthermore, the material developed is tested with the water sample collected from a real affected area, from the Dhar district of India, and the material showed promising results in terms of fluoride removal efficacy. |
