[PDF] Top 20 Kinetic Studies on Hexavalent Chromium Reduction

... kinetic conditions, the monomeric species of Cr(VI) has been found kinetically active. Cr(VI)-substrate ester ex- periences a redox decomposition through 2 electron transfer at the rate determining step. The ... See full document

... The results obtained in this study indicate the potentiality of CDPT for the removal of Cr(VI). Maximum Cr(VI) adsorption (14.75 mg g −1 ) occurred at pH ~2. Adsorption process revealed that the initial uptake of Cr(VI) ... See full document

... solani. Studies were also conducted in Transmission Electron Microscope in order to have an insight mechanism of distribution of Cr in the biomass and in the media at 500 mg l -1 initial Cr(VI) concentration and ... See full document

... Cr(VI) reduction was first stated in the late 1970s, when Romanenkoand Koren‟Kov (1977) observed a Cr(VI) reduction capability in Pseudomona ...the reduction of Cr (VI) to Cr(III) under varying ... See full document

... vivo studies of Cr(III), it can react with DNA and protein molecules on entering into the cell and make stable bonds because of its brutal reactivity with oxygen, nitrogen and sulfur on a few binding sites ... See full document

... remove hexavalent chromium from aqueous ...of hexavalent chromium was examined through adsorption on a strong basic anion resin with changing pH, contact time, initial concentration of the ... See full document

... Heavy metals present in high concentrations in aquatic systems are posing serious problems to aquatic life. Among the heavy metals, chromium has been used in many industries and hence its removal from waste waters ... See full document

... electrochemical reduction of Cr(VI) has been widely studied and applied as an effective method for treating the Cr(VI)-contaminated ...the reduction of Cr(VI) on the electrosynthesized polypyrrole (PPy) ... See full document

... industries. Hexavalent chromium is present in effluents from electroplating, paint, pigment, cement, mining, dyeing, leather tanning, fertiliser and photography ...industries. Hexavalent ... See full document

... of reduction of Cr(VI) by an aromatic alcohol, benzyl alcohol, (which is an important volatile component of flowers of some night blooming plants) in micellar media have been studied ...of reduction of ... See full document

... Effect of pH on the Cr 6+ adsorption by waste yogurt was studied over pH range of 1 to 8. Different pH conditions were maintained by sodium acetate buffer. Maximum removal conc. of Cr 6+ was observed at pH 2 as shown in ... See full document

... on hexavalent chromium ion have been evaluated with respect to pH, adsorbent dosage, particle size, concentration of hexavalent chromium ion and contact time using batch adsorption ...of ... See full document

... The chromium removal abilities of Citrus limonium shell are equal or better than those of other reported biomass, for example tamarind shell [13], Mammea americana [37], Candida maltose RR1 ...efficient ... See full document

... 1988). Chromium is a blue grey metal that can be polished to achieve a high ...brittle. Chromium is a fairly active ...for chromium (III) ...air, chromium will oxidize to form a thin layer ... See full document

... Various contact times were worked out in a batch reactor (0,15,30,45,60,120 minutes) at an begining concentration of 25 mg/L of chromium ion at pH 6.0. 1 g of biosource dosage in 100 ml solution was taken in 250 ... See full document

... of hexavalent chromium (Cr(VI)) ions from synthetic aqueous solution was investigated using noni seeds ...the reduction of Cr(VI) to Cr(III) and contact time has been studied in batch-stirred ... See full document

... with hexavalent chromium due to chromite ...that hexavalent chromium is highly toxic to living beings including the flora & fauna around Sukinda mining ...of hexavalent ... See full document

... the reduction in their ...previous studies showing that CrVI exposure leads to higher accumulation of Cr in uterus and ovary and revealed delayed sexual maturation with extended estrous cycle compared to ... See full document

... in hexavalent Cr(VI) polluted environment, as more than 74% (109) of total isolates could easily tolerate 2 mM ...Cr(VI) reduction mechanisms as an adaptive ... See full document

... of hexavalent chromium with QINZ is described, a rapid and sensitive first derivative ratio spectrum zero-crossing method is undertaken to determine Cr (VI) in the presence of Fe (III) and Ti (IV) in ... See full document