02344nas a2200265   4500008004100000022001400041245014100055210006900196260007300265300001200338490000800350520135100358653002301709653002801732653002001760653001901780653001401799100002201813700002201835700002301857700002401880700002501904700002901929856012001958       2011                        eng d  a0926-337300aEfficiency and recycling capability of montmorillonite supported Fe-Ni bimetallic nanocomposites towards hexavalent chromium remediation0 aEfficiency and recycling capability of montmorillonite supported  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcMAY  a407-4140 v1043 a<p>The remediation of Cr(VI) from simulated water streams is investigated using Fe-Ni bimetallic nanoparticles (Fe-Ni NPs) and their nanocomposites prepared with montmorillonite (MMT) clay. These nanocomposites are characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and Brunauer-Emmett-Teller (BET) surface area analyses. XRD analysis revealed proper dispersion as well as intercalation of Fe-Ni NPs in the clay matrix. TEM of nanocomposites showed the presence of spherical particles having a size of 20-40 nm. Batch experiments with a 25 mg L(-1) Cr(VI) solution and 2 g L-1 Fe-Ni NPs exhibited complete reduction of Cr(VI) within 10 min that follows first order reaction kinetics. Amongst 25%, 50%, 75% in situ and loaded nanocomposites, 75% compositions possess better activity with enhanced reduction capacity below pH 4 due to generation of reactive H center dot species. XPS analysis of nanocomposites after Cr(VI) treatment suggested that reduction process occurs through Cr(111) formation followed by its subsequent reduction to Cr(0). Their potentiality towards reusage is established from the recycling experiments that revealed the order of efficiency as 75% in situ &gt; Fe-Ni NPs &gt; 75% loaded nanocomposites. (C) 2011 Elsevier B.V. All rights reserved.</p>10aCr(VI) remediation10aIron-nickel bimetallics10aMontmorillonite10aNanocomposites10aRecycling1 aKadu, Brijesh, S.1 aSathe, Yogesh, D.1 aIngle, Abhijit, B.1 aChikate, Rajeev, C.1 aPatil, Kashinath, R.1 aRode, Chandrashekhar, V.  uhttps://library.ncl.res.in/content/efficiency-and-recycling-capability-montmorillonite-supported-fe-ni-bimetallic-0