Evaluation of the adsorptive properties of locally available alumino-silicate clay in As(III) and As(V) remediation from groundwater

Jeffries's magnesium ribbon – potassium oxalate method for the removal of free iron oxide from soils has been examined and compared with Beck's modification of the method of Drosdoff and Truog. Iron oxide minerals, whether hydrated or unhydrated, were readily dissolved by the nascent hydrogen – oxalate treatment provided they were in a sufficiently finely divided state. Alumino-silicate clay minerals were not attacked to any appreciable extent, and in general the degree of attack on silicate iron did not appear to be very great. However, biotite was quite seriously attacked by the treatment and relatively large errors could be expected in the estimation of free iron oxide in soils containing much of this mineral. The amounts of silica dissolved from soils by Jeffries's treatment were of the same order as those dissolved by Beck's treatment. The nascent hydrogen method was more efficient than the hydrogen sulphide method, particularly for yellow soils and soils high in free iron oxide.

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Visualization of the Platelet-Plasma Interface

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100079905 ◽

1977 ◽

Vol 35 ◽

pp. 494-495

Author(s):

D. C. Brindley ◽

M. McGill

Keyword(s):

Platelet Rich Plasma ◽

Coagulation Factors ◽

Platelet Membrane ◽

Rabbit Platelet ◽

Surface Coat ◽

Special Relationship ◽

Routine Method ◽

Embedding Technique ◽

Biochemical Analyses ◽

Adsorptive Properties

Morphological and cytochemical studies of platelets have reported a surface coat, or glycocalyx, external to the plasma membrane (1). Biochemical analyses have likewise confirmed the highly adsorptive properties of platelets as transporters of coagulation factors (2). However, visualization of the platelet membrane by conventional EM procedures does not reflect this special relationship between the platelet and its plasma environment. By the routine method of alcohol-propylene oxide dehydration for Epon embedding, the lipid bilayer nature of the platelet membrane appears similar to other blood cells (Fig. 1). A new rapid embedding technique using dimethoxypropane (DMP) as dehydrating agent (13) has permitted ultrastructural analyses of the surface features of the platelet-plasma interface.Aliquots of human or rabbit platelet-rich plasma (PRP) were added to equal volumes of 6% glutaraldehyde in Millonig's buffer at 37° for 45 minutes, rinsed in buffer and postfixed in 1% osmium in Millonig's buffer for 45 minutes.

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Zeolite-gas systems and solar refrigeration : a study of the adsorptive properties at high pressures in the R22 freon-13X zeolite and ammonia-13X zeolite systems

Journal de Chimie Physique ◽

10.1051/jcp/1990870393 ◽

1990 ◽

Vol 87 ◽

pp. 393-405

Author(s):

B Diawara ◽

LC Dufour ◽

R de Hartoulari ◽

M Moutaabbid ◽

MH Simonot-Grange

Keyword(s):

High Pressures ◽

13X Zeolite ◽

Solar Refrigeration ◽

Adsorptive Properties

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Glass in building. Basic alumino silicate glass products

10.3403/30321559u ◽

2016 ◽

Keyword(s):

Silicate Glass ◽

Alumino Silicate

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Fate of Toxic Organic Compounds in Activated Sludge and Integrated PAC Systems

Water Science & Technology ◽

10.2166/wst.1987.0227 ◽

1987 ◽

Vol 19 (3-4) ◽

pp. 471-482 ◽

Cited By ~ 19

Author(s):

W. J. Weber ◽

B. E. Jones ◽

L. E. Katz

Keyword(s):

Activated Carbon ◽

Activated Sludge ◽

Organic Compounds ◽

Powdered Activated Carbon ◽

Carbon Adsorption ◽

Powdered Carbon ◽

Benzene Toluene ◽

Adsorptive Properties ◽

Carbon Concentrations ◽

Toxic Organic Compounds

The addition of powdered activated carbon (PAC) to activated sludge treatment systems to enhance removal of specific toxic organic compounds from wastewater was evaluated. Nine organic compounds encompassing a range of solubility, volatility, biodegradability, and adsorptive properties were studied. Kate and equilibrium investigations were conducted to quantify the removal mechanisms of volatilization, biodegradation, biosorption, and carbon adsorption. Results from steady-state bioreactor studies showed that the addition of less than 100 mg/ℓ powdered activated carbon to the influent did not enhance the removal of the biodegradable target compounds investigated: benzene, toluene, ethylbenzene, o-xylene, chlorobenzene, and nitrobenzene. Significantly improved removals of the poorly degradable and non-biodegradable compounds 1,2-dichlorobenzene, 1,2,4-trichlorobenzene, and lindane occurred at influent powdered carbon concentrations in the 12.5 to 25 mg/ℓ range. Influent powdered carbon concentrations of 100 mg/ℓ effected overall removals of greater than 90%. The addition of powdered activated carbon not only reduced effluent concentrations but also reduced the amounts of the volatile compounds stripped to the atmosphere.

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A complementary analysis of the porous structure of biochars obtained from biomass

Carbon letters ◽

10.1007/s42823-019-00101-4 ◽

2019 ◽

Vol 30 (3) ◽

pp. 325-329 ◽

Cited By ~ 1

Author(s):

Mirosław Kwiatkowski ◽

Dimitrios Kalderis

Keyword(s):

Structural Analysis ◽

Porous Structure ◽

Rice Husk ◽

Wood Chips ◽

Complementary Information ◽

Analysis Methods ◽

Eucalyptus Wood ◽

Adsorptive Properties ◽

Complementary Analysis ◽

Carbonaceous Adsorbent

Abstract This paper presents the results of the analysis of the porous structure of biochars produced from biomass, namely eucalyptus, wood chips, pruning waste and rice husk. The structural analysis was carried out using the BET, the t-plot, the NLDFT and the LBET methods, which yielded not only complementary information on the adsorptive properties of obtained biochars from these materials, but also information on the usefulness of the structural analysis methods in question for the research into an effect of the technology of carbonaceous adsorbent preparation.

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