Reduction of structural Fe(III) in oxyhydroxides by Shewanella decolorationis S12 and characterization of the surface properties of iron minerals

2011 ◽  
Vol 12 (2) ◽  
pp. 217-227 ◽  
Author(s):  
Xiaomin Li ◽  
Tongxu Liu ◽  
Fangbai Li ◽  
Wei Zhang ◽  
Shungui Zhou ◽  
...  
Keyword(s):  
Surface Properties ◽  
Shewanella Decolorationis S12 ◽  
Iron Minerals

Development and Characterization of Amine-Clay Hybrid Adsorbents for CO2 Capture

2016 ◽  
Vol 1133 ◽  
pp. 547-551 ◽  
Author(s):  
Ali E.I. Elkhalifah ◽  
Mohammad Azmi Bustam ◽  
Azmi Mohd Shariff ◽  
Sami Ullah ◽  
Nadia Riaz ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Surface Area ◽  
Surface Properties ◽  
Molar Mass ◽  
Adsorption Ability ◽  
Stepwise Increase ◽  
Inverse Effect ◽  
Bet Method ◽  
Sodium Form

The present work aims at a better understanding of the influences of the intercalated mono-, di- and triethanolamines on the characteristics and CO2 adsorption ability of sodium form of bentonite (Na-bentonite). The results revealed that the molar mass of intercalated amines significantly influenced the structural and surface properties as well as the CO2 adsorption capacity of Na-bentonite. In this respect, a stepwise increase in the d-spacing of Na-bentonite with the molar mass of amine was recorded by XRD technique. However, an inverse effect of the molar mass of amine on the surface area was confirmed by BET method. CO2 adsorption experiments on amine-bentonite hybrid adsorbents showed that the CO2 adsorption capacity inversly related to the molar mass of amine at 25 ͦC and 101 kPa. Accordingly, Na-bentonite modified by monoethanolammonium cations adsorbed as high as 0.475 mmol CO2/g compared to 0.148 and 0.087 mmol CO2/g for that one treated with di- and triethanolammonium cations, respectively.

Nitrate and nitrite reduction by ferrous iron minerals in polluted groundwater: Isotopic characterization of batch experiments

2020 ◽  
Vol 548 ◽  
pp. 119691
Author(s):  
Rosanna Margalef-Marti ◽  
Raúl Carrey ◽  
José Antonio Benito ◽  
Vicenç Marti ◽  
Albert Soler ◽  
...  
Keyword(s):  
Ferrous Iron ◽  
Nitrite Reduction ◽  
Batch Experiments ◽  
Iron Minerals ◽  
Isotopic Characterization ◽  
Nitrate And Nitrite
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