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231224s2018 xx |||||o 00| ||eng c |
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|a 10.1080/09593330.2017.1336574
|2 doi
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|a pubmed25n0907.xml
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|a (DE-627)NLM272330345
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|a (NLM)28552012
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Veneu, Diego Macedo
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Cadmium removal by bioclastic granules (Lithothamnium calcareum)
|b batch and fixed-bed column systems sorption studies
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|c 2018
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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| 338 |
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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| 500 |
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|a Date Completed 13.08.2018
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|a Date Revised 02.12.2018
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a The potential of Bioclastic Granules - BG (calcium-carbonate-based material) using the algae Lithothamnium calcareum as sorbent for the removal of Cd(II) from aqueous solutions by sorption was evaluated through batch and continuous systems tests using a fixed-bed column. Sorption process variables, in particular pH (2-7), particle size (<38-300 μm), initial BG concentration (0.1-1.0 g L-1), initial Cd(II) concentrations (5-400 mg L-1) and contact time (5-240 min), were evaluated. Adsorption isotherm profiles of Cd(II) per BG were similar to an L-type, or Langmuir type, with the adsorption forming a monolayer of approximately 0.61 μm, with a qmax of 188.74 mg g-1 and kL of 0.710 L mg-1. Thomas's model considers that sorption is not limited to a chemical reaction but is controlled by mass transfer at the interface. In the present study, the obtained value of kTh was 0.895 mL h-1 mg-1, reaching a sorption capacity qo of 124.4 mg g-1. For the Yoon-Nelson model, it was possible to obtain two important parameters to describe the behavior of the column, the rate constant (kYN), obtaining a value of 0.09 h-1 and an τ of 82.12 h corresponding to the time required for sorption to occur of 50% of the solute in the rupture curve. X-ray diffraction and scanning electron microscopy analyses coupled to the X-ray dispersive energy system (SEM/EDS) of the BG after the Cd(II) ion sorption tests evidenced the formation of crystals with the prevalence of a new mineral phase (otavite)
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|a Journal Article
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|a Sorption
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|a cadmium
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| 650 |
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|a carbonate minerals
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| 650 |
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4 |
|a heavy metal
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4 |
|a otavite
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|a Water Pollutants, Chemical
|2 NLM
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|a Cadmium
|2 NLM
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| 650 |
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|a 00BH33GNGH
|2 NLM
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| 700 |
1 |
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|a Schneider, Claudio Luiz
|e verfasserin
|4 aut
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|a de Mello Monte, Marisa Bezerra
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Cunha, Osvaldo Galvão Caldas
|e verfasserin
|4 aut
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| 700 |
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|a Yokoyama, Lídia
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Environmental technology
|d 1998
|g 39(2018), 13 vom: 16. Juli, Seite 1670-1681
|w (DE-627)NLM098202545
|x 1479-487X
|7 nnns
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| 773 |
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|g volume:39
|g year:2018
|g number:13
|g day:16
|g month:07
|g pages:1670-1681
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|u http://dx.doi.org/10.1080/09593330.2017.1336574
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