[PDF] Top 20 1. A study on removal of chromium from aqueous solution

... The Walnut shell were collected and then washed with water for removal of dust adhere to it. Adsorbents were sieved using 100 micron sieves to attain uniformity .Then it was placed in oven for 24 hours at 100ᵒ C ... See full document

... hazardous Chromium [VI] ions from aqueous solutions was ...investigated. Removal of chromium ions from stock solution of known concentration of Potassium dichromate was ... See full document

... ions from water, which include chemical precipitation, reverse osmosis, ion-flotation, evaporation, ion-exchange and adsorption [6, ...suffer from drawbacks such as incomplete metal removal, high ... See full document

... bioaccumulation from contaminated water, soil and air and pose a serious threat due to its toxicity and non degradable properties ...[8]. Chromium with its increasing industrial uses in plating, metal ... See full document

... available methods to accomplish the reduction of metal concentration. Nevertheless many of these approaches are marginally cost effective or difficult to implement in developing countries. Therefore, the need arises for ... See full document

... of chromium, pH was adjusted to ...The solution was mixed well and then diluted to 100 ml in a volumetric flask using double distilled ...DPC solution was added and mixed ...this solution was ... See full document

... the removal of chromium and on the oxidation state of chromium in persimmon gel was then ...Cr(VI) removal from the aqueous solu- tion was quantitative at initial Cr(VI) ... See full document

... calculated from the difference between total Cr and Cr(VI) con- ...2) from the difference between initial and final total Cr concentrations as stated ... See full document

... the solution for the concentration of ions in the solution is directly connected to the electrode surface, (Concentration ...in solution. Each ion in aqueous solution is surrounded by a ... See full document

... simultaneous removal of hexavalent chromium and nitrate ions from an aqueous solution by electrocoagulation (EC) using aluminum as the anode was ...basic chromium and 500 mg L of ... See full document

... widely used for Cr removal, problems associated with activated carbon decrease the attraction of its application. Therefore, researchers are trying to find a low-cost and effective adsorbent. Recently, various ... See full document

... streams from large industrial sectors [3, ...ranges from sublethal to lethal depending on the time of exposure and amount of dose ...[5]. Chromium (Cr) typically occurs in two oxidation states namely ... See full document

... The solution pH was around ...this study as the pH during ion exchange remained below 5. The solution was separated from the solid using a vacuum filtration flask with a 47 mm diameter membrane ... See full document

... (VI) removal from aqueous solution using Boodlea struveiodes, green marine algae as an adsorbent ...the removal process was ...CCD. From the Analysis Of Variance (ANOVA) table ... See full document

... batch removal of toxic hexavalent chromium ions from wastewater and aqueous solution using dried (BD) Sargassum ...prepared from it was ...of solution pH, initial ... See full document

... Furthermore, as the mandarin shell contains vitamin C and some carbohydrates, we found that vitamin C and cystine quickly reduce Cr (VI) to Cr (III), and could be very important part in the metal reduction, confirming ... See full document

... Adsorptive removal of Chromium(VI) from aqueous solution onto AC prepared from marine algae has been studied under varying conditions of agitation time, metal ion concentration, ... See full document

... percentage removal of Cr (VI) and the effect of contact time, the efficiency of removal of Cr(VI) increases with increasing the contact time, approximately 70-80 % of maximum removal of Cr (VI) is ... See full document

... 1. Calibration pipette out measured volume of standard chromium solution (5 µg/ml) ranging from 2.00 to 10.0ml/L to give standards for 10 to 50 µg Cr+6 into 100 ml Nessler’s tube, add 0.5ml ... See full document

... initial solution pH was adjusted by using ...separated from the test solution by filtration. The chromium ion content in the supernatant liquid was determined using photoelectric ...standard ... See full document