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1

Evaluation of adsorption parameters and charge densities of some selected soils: application to lead

100%
Diatta J. B.
Electronic Journal of Polish Agricultural Universities. Series Environmental Development
|
2002
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tom 05
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nr 2
An attempt to evaluate adsorption parameters and charge-based densities for Pb is reported in the paper. The method was based on the calculation of Langmuir adsorption maximum (amax), and the bonding energy term (b). The parameters were the outcome of well-established linear relationships of Ce/S versus Ce (Ce, equilibrium concentration and S, amount adsorbed). The use of charge-based sorption density parameter (SDCEC), which expressed the number of accessible charges for Pb adsorption, evidenced the occurrence of two main adsorption phases, characterised by two different slopes. The first ones, varying from 0.536 to 3.144 were suggested to be attributed to ‘high attractive sites’, whereas the second with slopes from 0.011 to 0.259, probably represented ‘low attractive sites.
2

Removal of direct dyes from aqueous solution using various adsorbents

100%
Yavuz O., Aydin A. H.
Polish Journal of Environmental Studies
|
2006
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tom 15
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nr 1
Dyestuff production units and dyeing units have always had a pressing need for techniques that allow economical pre-treatment for colour in the effluent. The effectiveness of adsorption for dye removal from wastewaters has made it an ideal alternative to other expensive treatment options. Removal of direct dyes [direct yellow 50 (DY50), direct red 80 (DR80) and direct blue 71(DB71)] from an aqueous solution by different adsorbents such as activated carbon, raw kaolinite and montmorillonite was investigated. The adsorption isotherm data were fitted to the Langmuir isotherm. Parameters of the Langmuir isotherm have been determined using the adsorption data. Adsorption capacity of RAC (commercial activated carbon), HAC (activated carbon obtained from shell of hazelnut), KC ( raw kaolinite) and MC (montmorillonite) increased in the following order: DY50 > DR80 > DB71, DB71>DR80>DY50, DR80>DB71>DY50 and DB71>DR80 (DY50 showed no absorption) for the direct dyes, respectively.
3
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Testing of reactive materials for phosphorus removal from water and wastewater-comparative study

84%
Karczmarczyk A., Bus A.
Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation
|
2014
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tom 46
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nr 1
Excess of phosphorus in surface water is a global problem. Phosphorus found in rivers, streams, agricultural ditches and lakes comes from both point and diffuse sources. To keep water bodies in a good ecological status it is necessary to manage it a at local level. One of the possible solutions is to use reactive materials in wastewater treatment plants as well as in case of diffuse sources of pollution to implement it in water bodies transporting pollutants from small catchments. This paper presents results of research made over the period of 6 years (2008–2013) in the Department of Environmental Improvement and Water Center WULS-SGGW. Seventeen different materials available in Poland and in other parts of the world were tested as potential reactive materials for phosphorus. The most effective P-sorption reactive materials are: Polonite®, shell sand, AAC, Pollytag and limestone with the apparent sorption capacities of: 94.32, 48.39, 43.17, 28.95, and 11.12 mg/g respectively.
4
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Assessment of sorption properties and kinetic reaction of phosphorus reactive material to limit diffuse pollution

67%
Bus A.
Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation
|
2017
|
tom 49
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nr 3
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