Adsorptive removal of Cr(VI) onto UiO-66-NH2 and its determination by radioanalytical techniques
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UiO-66-NH2 (UNH), a Zr-based metal organic framework was synthesised by solvothermal technique. The formation of UNH was confirmed by XRD and SEM–EDX results. The adsorptive behaviour of UNH towards Cr(VI) was investigated with respect to pH, temperature, contact time and adsorbent dose. Radioanalytical techniques such as PIXE and INAA were employed for determination of adsorbed Cr(VI), which was well validated from Diphenylcarbazide method. Adsorption process was endothermic and followed pseudo second order kinetics. The maximum adsorption capacity was found to be 25.9 mg g−1 at pH 2.0 and adsorbent dose of 1 g L−1 in 3 h.
KeywordsUNH Solvothermal Cr(VI) Adsorption capacity Radioanalytical NAA
Authors are thankful to BRNS, DAE, Govt. of India, for the project and financial support under the project number 37(2)/14/02/2018/37002. The management of S‘O’A (Deemed to be university), Bhubaneswar are thankfully acknowledged for their encouragement and constant support in this work. Authors thank Dr. P.K. Pujari, Associate Director, RC&I Group and Head, RCD, BARC for his support and encouragements. Authors thank operation staff of PCF of Dhruva research reactor, BARC as well as scientists and staff members of Ion Beam Laboratory, Institute of Physics, Bhubaneswar for their help during INAA and PIXE experiments, respectively. Authors thank Mr Vishal Sharma, JRF (CSIR) at RCD for his help in PIXE and NAA experiments.
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Conflict of interest
There is no conflict of interest.
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