applications of magnetite nanoparticles for heavy metal removal from wastewater

... Surface modification of magnetic nanoparticles 18 2.4.3 Application of magnetic nanoparticles 19 2.5 Heavy metals and its pollution 19 2.5.1 Sources of heavy metal pollution ... x List of Tables Table 2- A list of works on heavy metal removal from waste water by various adsorbents 23 Table 2- Few notable works on ionic liquids as adsorbent for heavy metals ... cost of separation of detrimental pollutants like heavy metals Recently, scientists have focused on the development of the nanomaterials as adsorbents for the separations of biomolecules, heavy metals,...

Ngày tải lên: 08/09/2015, 19:41

... issue of heavy metal pollution The present work, therefore, intends to bridge the gap by developing multifunctional membranes for simultaneous visual detection and adsorptive removal of heavy metal ... biological point of view, the term heavy metal refers to a group of metal and semimetals (metalloids) with a specific gravity that is at least times of the specific gravity of water, which have ... heavy metal contaminants have been dramatically increased due to the intensified industrial and urban activities The major source of heavy metal contaminants is usually from the wastewaters of...

Ngày tải lên: 09/09/2015, 17:52

... of functional adsorbents for the removal and separation of heavy metal ions from water or wastewater The application of amine-functionalized PGMA-based adsorbents (denoted as aminePGMA) for heavy ... and selectively separate heavy metal ions from wastewaters are of great research and practical interest Various technologies have been applied for the removal of heavy metal ions, including chemical ... industrial applications for the removal of heavy metal ions from wastewaters However, activated carbon is generally known to have slow adsorption rate and low adsorption capacity towards heavy metal...

Ngày tải lên: 14/09/2015, 08:48

... responsible for scavenging heavy metals from influent wastewater The physico-chemical forms for heavy metals once in the wetlands change dramatically depending on several characteristics of the metal ... equilibrium the rate of removal of metal ions in the form of a precipitate equals the rate of their dissolution from the precipitate When the values of the concentration of cation and anion are ... and toxicity of heavy metals to living organisms and because of its relevance to efforts of understanding geochemical cycles of metals in the environment The sequences of stability of complexes...

Ngày tải lên: 15/03/2014, 23:06

... allowed for the production, characterization and functionalization of magnetic nanoparticles for specialized clinical applications Extensive research has been done on use of magnetic nanoparticles for ... biomedical applications A crucial issue facing the use of magnetic nanoparticles for active targeting in vivo is the minimization or delaying of phagocytosis of these nanoparticles by the MPS The nanoparticles ... can be made biocompatible Therefore, magnetite nanoparticles were chosen for use in this project The first approach was to coat individual magnetite nanoparticles of about 6-8 nm with polymers...

Ngày tải lên: 14/09/2015, 14:03

... concentrate on applications of COFRADIC in studying selected post-translational modifications ) protein processing [34,36] and N-glycosylation [39] – and describe the use of COFRADIC for studying ... the actual site of proteolytic cleavage, data interpretation and the design of followup analyses are straightforward COFRADIC-based sorting of N-glycosylated peptides Glycosylation of asparagines ... [72], COFRADIC has a number of unique properties As COFRADIC is essentially a peptide-sorting technology by which only a set of peptides representative of the proteomic problem is withdrawn from...

Ngày tải lên: 18/02/2014, 16:20

... column from the water form to the acid eluent form and vice-versa [34], as shown in Figures 2.2 and 2.3 Figure 2.2a shows the conversion of the column from the water form into the sulfuric acid form, ... portions of the stationary phase [35,36] High pH-dependence of the retention times of these species has been explained as the consequence of the effects of the changing degree of dissociation of the ... schematic diagram of the formation of the hypothetical Donnan membrane and mechanism of separation by ion-exclusion chromatography (Reproduced from Application Note 106, with permission from Dionex,...

Ngày tải lên: 22/03/2014, 09:20

... different from those experienced in the real world could evoke symptoms of cybersickness, even though such stimuli would excite the users and increase their sensed feeling of reality Thus, for expanding ... processing of visual motion signals for postural control and vection perception In addition, Watanabe and associates reports a preliminary study on the effect of predictive visual sign of acceleration ... for expanding application of VR in rehabilitation engineering, concerns of cybersicknes should be addressed Referring to neuroscientific models [4-6], the influences of vestibularautonomic responses...

Ngày tải lên: 19/06/2014, 10:20

... for the air electrode of a Li/air battery The shape and size of the nanoparticles are observed using scanning electron microscopy and transmission electron microscopy analyses The formation of ... property of the air electrodes containing Co3O4 nanoparticles is significantly associated with the shape and size of the nanoparticles It appears that the capacity of electrodes containing villiform-type ... Co3O4 nanoparticles is superior to that of electrodes containing cube- and flower-type Co3O4 nanoparticles This is probably due to the sufficient pore spaces of the villiform-type Co3O4 nanoparticles...

Ngày tải lên: 20/06/2014, 23:20

... because of vigorous mixing in making a slurry The crystallinity of the three types of Co3O4 nanoparticles was investigated by XRD As shown in Figure 2, all XRD peaks of the cube-type Co3O4 nanoparticles ... Figure XRD patterns of the Co3O4 nanoparticles and reference Co3O4 shows the initial voltage profile of the electrodes containing the Co3O4 nanoparticles in the voltage range of 4.35 to 2.3 V The ... on the type of Co O nanoparticles The electrode containing villiform-type Co3O4 nanoparticles showed a higher discharge capacity than the electrodes containing other types of Co3O4 nanoparticles...

Ngày tải lên: 21/06/2014, 17:20

... morphology of magnetite nanoparticles was shown (Fig 4b) after the magnetite/ chitosan composite was degraded by H2O2 As can be seen from Fig 4a, the magnetite nanoparticles with mean diameter of 13 ... from TEM Principle of In Situ Mineralization of Magnetite in Chitosan Hydrogel Fig TG curves of pure magnetite (a) and the mineralized magnetite nanoparticles (b) existence of chitosan layer changes ... [19], an estimate of the upper bound for magnetite particle size can be obtained from the slope of the magnetization near zero field The calculated result for The principle of magnetite mineralization...

Ngày tải lên: 21/06/2014, 20:20

Ngày tải lên: 05/08/2014, 15:21

... (1991) Landforms of Northwestern ON For Can, Ont Region, Sault Sainte Marie, ON, COFRDA Rep 3312, 63 p Sims RA, Uhlig P (1992) The current status of forest site classification in Ontario For Chron ... the process of bringing these concepts into some valid and usable form for resource applications and planning Ecosystem units (ie individual forest sites according to some combination of vegetation, ... the west of Lake Superior, along the US border, the forests constitute part of the Great Lakes-Saint Lawrence Forest Region (Rowe, 1972) of Canada At one time, extensive communities of red pine...

Ngày tải lên: 08/08/2014, 19:21

... which bent Values of bend radii for materials used in IDP Development of model as cut from sheet, before being bent Adding corner reliefs and slots for ease of manufacture Use of Flat/Folded models ... requirement for auxiliary brackets formed from sheet metal To save time, a small library of standard brackets has been compiled, which can be modified to individual requirements Note that from wherever ... choose from 3.1 Simple Modification of Dimensions To modify the overall size of the chassis one can return to the original solid extrusion To increase, for example, the overall length of the...

Ngày tải lên: 14/08/2014, 11:20

... DESIGN AND APPLICATIONS OF PHOSPHINE LIGANDS TO TRANSITION METAL- CATALYZED REACTIONS JIANG CHUNHUI (M.Sc., Nanjing Univ.) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF CHEMISTRY ... ii Table of Contents Thesis Declaration i Acknowledgements ii Table of Contents iii Summary vi List of Tables viii List of Figures ix List of Schemes x List of Abbreviations xiv List of Publications ... career Besides my advisor, I am deeply indebted to Prof Tamio Hayashi for his sharing of knowledge and intellectual discussions Every member of Prof Lu’s group has been extremely supportive and I...

Ngày tải lên: 09/09/2015, 09:59

... value of the ARL for different values of observed fraction nonconforming and desired false alarm rate Table 5.3 Some numerical value of the ARL for different values of observed fraction nonconforming ... limits for Shewhart charts As discussed earlier the conventional Shewhart charts for attributes suffer from limitations when the value of fraction nonconforming or the rate of occurrence of nonconformities ... for different values of inspection errors Table 5.6 Values of the adjustment factor for a process with average fraction nonconforming = 50 ppm, ψ = 0.2 and θ = 0.0002 Table 5.7 Number of conforming...

Ngày tải lên: 15/09/2015, 20:57

... record for any hospital admissions occurring outside of WA We had no way of reliably assessing how many survey children had moved away from WA for the entire follow-up period or any part thereof ... birthday For children aged 14 years or older in 1993, start of follow-up was the date of the survey interview Children were followed to the end of December 2007 or date of first hospital admission for ... episodes of DSH resulting in admission to hospital for 37 WACHS children (1.4%) over the follow-up period The median age of first admission for DSH was 18 years There were eight cases of injury of...

Ngày tải lên: 11/08/2014, 16:22

... in 50 from beginning, the absorption rate of Cd2+ is slightly higher than that of Pb2+, but over 50 min, the absorption capacity of PTW for Cd2+ is lower than that for Pb2+ Absorptions of Pb2+ ... structure of PTW - 16 - Journal of Water and Environment Technology, Vol.5, No.1, 2007 Table below gives the ion diameters of some heavy metal ions It can be seen from the table that the metal ions ... quantity, so the removal of Pb2+ and Cd2+ increases, while the absorption capacity of PTW decreases This is because that with a given content of the metallic ions in water, as the quantity of absorbent...

Ngày tải lên: 05/09/2013, 09:38

... sorption experiments were performed by batch method Samples of 0.1 g of magnetic chitosan nanoparticles were equilibrated with 50 mL of solution containing various amount of Cr(VI) The pH value X-ray ... the form of H2CrO4, while in the pH range of 1–6, different forms of chromium 2− − 2− − such as Cr2O7 , HCrO4 , and Cr3O10 coexist while HCrO4 predominates 2− 2− As the pH increases, those form ... of magnetic chitosan nanoparticles 1216 N.N Thinh et al / Materials Science and Engineering C 33 (2013) 1214–1218 in the range of 2θ = 10°–60°, and a scanning rate of 0.02°·s −1 Morphology of...

Ngày tải lên: 02/07/2014, 14:14

... several rounds of synthesis are needed to obtain sufficient amount for further applications Recently, the synthesis of ultra-large-scale (tens of grams) of monodisperse magnetite nanoparticles ... magnetization curves of (a) ferromagnetic nanoparticles and (b) superparamagnetic nanoparticles     Figure 2-3  In vivo behavior of nanoparticles in blood vessels The EPR effect of nanoparticles is ... (b) as a function of incubated iron concentration for an incubation period of h Inset is the image of macrophages incubated with PLMA-2-SPIONs at an iron concentration of 2.0 mM for h after staining...

Ngày tải lên: 09/09/2015, 10:14