Removal of Fe(II) ions from aqueous solution by Calabrian pine bark wastes

2004 ◽  
Vol 93 (1) ◽  
pp. 99-102 ◽  
Author(s):  
B Acemioglu
Keyword(s):  
Aqueous Solution ◽  
Pine Bark ◽  
Calabrian Pine

REMOVAL OF Cd(II) IONS FROM AQUEOUS SOLUTION BY RETENTION ON PINE BARK

2012 ◽  
Vol 11 (1) ◽  
pp. 199-205 ◽  
Author(s):  
Lavinia Tofan ◽  
Carmen Paduraru ◽  
Brindusa Robu ◽  
Anca Miron ◽  
Roxana Laura Mihailescu Amalinei
Keyword(s):  
Aqueous Solution ◽  
Pine Bark

Biosorption of Pb(II) ions from aqueous solution by pine bark (Pinus brutia Ten.)

2009 ◽  
Vol 153 (1-3) ◽  
pp. 62-69 ◽  
Author(s):  
Ali Gundogdu ◽  
Duygu Ozdes ◽  
Celal Duran ◽  
Volkan Numan Bulut ◽  
Mustafa Soylak ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Pine Bark ◽  
Pinus Brutia

Diuron Sorption by Pine-Bark Substrate and Foliar vs. Root Absorption by Yellow Woodsorrel (Oxalis stricta)

2005 ◽  
Vol 19 (3) ◽  
pp. 532-538 ◽  
Author(s):  
Carey V. Simpson ◽  
Glenn Wehtje ◽  
Charles H. Gilliam ◽  
Jeff L. Sibley ◽  
James E. Altland
Keyword(s):  
Aqueous Solution ◽  
Aqueous Phase ◽  
Weight Reduction ◽  
Pine Bark ◽  
Fresh Weight ◽  
Shoot Fresh Weight ◽  
Root Absorption ◽  
Nursery Crops ◽  
Radiotracer Techniques

Postemergence-applied diuron effectively controls yellow woodsorrel in nursery crops grown in pine bark–based container substrate. Whether the phytotoxicity of diuron on yellow woodsorrel is exclusively the result of foliar activity or is partially the result of root-based activity has not been determined. Application in which diuron was allowed to contact both the foliage and the pine bark–based substrate provided 84% control as determined by shoot fresh-weight reduction relative to that of a nontreated control. Foliar-only and root-only applications provided 52 and 12% shoot fresh-weight reduction, respectively. Absorption and translocation of foliar-applied diuron by yellow woodsorrel was evaluated using radiotracer techniques. After 24 h, 86% of the applied diuron had been absorbed, and 76% of the amount applied remained in the treated leaflet, indicating minimal translocation. Diuron sorption by the pine bark–based substrate was evaluated using radiotracer techniques. After 3 h, less than 6% of applied diuron remained in the aqueous phase, indicating 94% sorption. Exposing yellow woodsorrel roots to diuron concentrations as low as 0.50 mg/L resulted in injury, and concentrations equal to or greater than 10 mg/L resulted in death. Calculations described herein indicate the concentration that probably would occur within the aqueous solution held within the substrate following a 1.12-kg ai/ha application is sufficient to be phytotoxic to yellow woodsorrel. Thus, root-based absorption is a contributing factor in the overall efficacy of postemergence-applied diuron in controlling yellow woodsorrel.

Optimization of the sorption process of copper cations from aqueous solution by pine bark (Pinus sylvestris)

2020 ◽  
Vol 186 ◽  
pp. 258-266
Author(s):  
Sławomir Wierzba ◽  
Agnieszka Dołhańczuk-Śródka ◽  
Jan Kříž
Keyword(s):  
Aqueous Solution ◽  
Pinus Sylvestris ◽  
Sorption Process ◽  
Pine Bark ◽  
Copper Cations

Structures Formed by Cryoprotective Agents Used in Freezc-Etching

1971 ◽  
Vol 29 ◽  
pp. 448-449
Author(s):  
G. G. Cocks ◽  
C. E. Cluthe
Keyword(s):  
Aqueous Solution ◽  
Polyethylene Oxide ◽  
Liquid Nitrogen Temperature ◽  
Ice Crystals ◽  
Etching Technique ◽  
Structural Constituent ◽  
Cryoprotective Agents ◽  
Quick Freezing ◽  
Freeze Etching ◽  
Fractured Surface

The freeze etching technique is potentially useful for examining dilute solutions or suspensions of macromolecular materials. Quick freezing of aqueous solutions in Freon or propane at or near liquid nitrogen temperature produces relatively large ice crystals and these crystals may damage the structures to be examined. Cryoprotective agents may reduce damage to the specimem, hut their use often results in the formation of a different set of specimem artifacts.In a study of the structure of polyethylene oxide gels glycerol and sucrose were used as cryoprotective agents. The experiments reported here show some of the structures which can appear when these cryoprotective agents are used.Figure 1 shows a fractured surface of a frozen 25% aqueous solution of sucrose. The branches of dendritic ice crystals surrounded hy ice-sucrose eutectic can be seen. When this fractured surface is etched the ice in the dendrites sublimes giving the type of structure shown in Figure 2. The ice-sucrose eutectic etches much more slowly. It is the smooth continuous structural constituent surrounding the branches of the dendrites.

Preparation and characterisation of vanadium pentoxide supported rhodium catalyst

1988 ◽  
Vol 46 ◽  
pp. 946-947
Author(s):  
A. Legrouri
Keyword(s):  
Aqueous Solution ◽  
Thermal Decomposition ◽  
Physicochemical Properties ◽  
Surface Area ◽  
Vanadium Pentoxide ◽  
High Purity ◽  
Gas Adsorption ◽  
Rhodium Catalyst ◽  
Optical Methods ◽  
Reducible Oxides

The industrial importance of metal catalysts supported on reducible oxides has stimulated considerable interest during the last few years. This presentation reports on the study of the physicochemical properties of metallic rhodium supported on vanadium pentoxide (Rh/V2O5). Electron optical methods, in conjunction with other techniques, were used to characterise the catalyst before its use in the hydrogenolysis of butane; a reaction for which Rh metal is known to be among the most active catalysts.V2O5 powder was prepared by thermal decomposition of high purity ammonium metavanadate in air at 400 °C for 2 hours. Previous studies of the microstructure of this compound, by HREM, SEM and gas adsorption, showed it to be non— porous with a very low surface area of 6m2/g3. The metal loading of the catalyst used was lwt%Rh on V2Q5. It was prepared by wet impregnating the support with an aqueous solution of RhCI3.3H2O.

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