01904nas a2200241   4500008004100000022001400041245013700055210006900192260007300261300001400334490000800348520100900356653001501365653001301380653001301393653002301406653001301429653001801442100002801460700001801488700002701506856012901533       2014                        eng d  a0169-433200aSynthesis of green nano iron particles (GnIP) and their application in adsorptive removal of As(III) and As(V) from aqueous solution0 aSynthesis of green nano iron particles GnIP and their applicatio  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcOCT  a1052-10590 v3173 a<p>{The present study reports a new approach to synthesise nano iron particles using leaf extract of Mint (Mentha spicata L.) plant. The synthesised GnIPs were subjected to detailed adsorption studies for removal of arsenite and arsenate from aqueous solution of defined concentration. Iron nanoparticles synthesised using leaf extract showed UV-vis absorption peaks at 360 and 430 nm. TEM result showed the formation of polydispersed nanoparticles of size ranging from 20 to 45 nm. Nanoparticles were found to have core-shell structure. The planer reflection of selected area electron diffraction (SAED) and XRD analysis suggested that iron particles were crystalline and belonged to fcc (face centred cubic) type. Energy-dispersive X-ray analysis (EDAX) shows that Fe was an integral component of synthesised nanoparticles. The content of Fe in nanoparticles was found to be 40%, in addition to other elements like C (16%), 0 (19%) and Cl (23%). FT-IR study suggested that functional groups like NH</p>10aAdsorption10aArsenate10aArsenite10aIron nanoparticles10akinetics10aM. spicata L.1 aPrasad, Kumar, Suranjit1 aGandhi, Pooja1 aSelvaraj, Kaliaperumal  uhttps://library.ncl.res.in/content/synthesis-green-nano-iron-particles-gnip-and-their-application-adsorptive-removal-asiii-002361nas a2200265   4500008004100000022001400041245013200055210006900187260000900256300001200265490000700277520148200284653001501766653001301781653000901794653001301803653000801816100002501824700001801849700002601867700002701893700001801920700002801938856012901966       2020                        eng d  a1060-132500aRemoval of fluoride from aqueous solution by mesoporous silica nanoparticles functionalized with chitosan derived from mushroom0 aRemoval of fluoride from aqueous solution by mesoporous silica n  cSEP   a619-6270 v573 a<p>In the present study, chitosan functionalized mesoporous silica nanoparticles have been synthesized. Chitosan derived from an edible mushroom, Agaricus bisporus was used during synthesis of chitosan functionalized silica nanoparticles. The functionalized silica nanoparticles were subjected to fluoride sorption using a batch method which subsequently showed removal efficiency of 95% with maximum sorption capacity, 58.8 mg/g. The characterization of nanoparticles was carried out by SEM, EDAX, XRD and FTIR analysis respectively. EDAX analysis suggested that oxygen, 51.83% and silica 37.24% was main constituent of the functionalized nanomaterials. XRD yielded characteristic diffraction pattern corresponding to the lattice planes (100), (110), (112), (120), (200) and (220) respectively. Sorption data was used to study equilibrium isotherm namely Langmuir and Freundlich model. The adsorption capacity increased with temperature while kinetics studies revealed that the adsorption process followed a pseudo-second-order rate equation. The enthalpy change (Delta H) and entropy change (Delta S) was found to be -31.36 kJmol(-1) and -7.75 Jmol(-1) K-1, showing endothermic and spontaneous nature of the fluoride adsorption. Data suggested that the nature of adsorption belonged to chemisorptions. The overall results suggested that the synthesized nanoparticles showed strong and specific affinity for fluoride and could be excellent adsorbents for defluoridation.</p>
10aAdsorption10aChitosan10aEDAX10aFluoride10aSEM1 aSrivastava, Anushree1 aKumari, Madhu1 aRamanathan, Alagappan1 aSelvaraj, Kaliaperumal1 aPrasad, Bablu1 aPrasad, Kumar, Suranjit  uhttps://library.ncl.res.in/content/removal-fluoride-aqueous-solution-mesoporous-silica-nanoparticles-functionalized-chitosan