https://nova.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:47037 CO32– > SO42– > Cl– > NO3–, although no significant inhibitory effects were observed with cations like Na+, K+, Mg2+, Ca2+, and Al3+. The positive correlation of AsV adsorption capacity with temperature demonstrated that the endothermic process and the negative value of Gibbs free energy increased (−14.95 to −12.47 kJ/mol) with increasing temperature (277 to 313 K), indicating spontaneous reactions. Desorption and regeneration showed that recycled Fe-chips, Fe-salt, and Zr–Fe-salt-coated biochars can be utilized for the effective removal of AsV up to six-repeated cycles.]]> Tue 13 Dec 2022 14:15:30 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:46916 2) capture using reactive silicate-based mineral slurries exposed to a gas flow containing CO₂. The model is validated through experimentation using thermally conditioned or heat-activated serpentinite (hydrous metamorphic ultramafic rock) in a laboratory-scale bubble column reactor. The kinetic model developed advocates a holistic modeling approach, offering an expanded view of the dissolution of heat-activated serpentinite under lean CO₂ conditions, in which the gas–liquid–solid system and its influence on CO₂ dissolution and the coupled dissolution behavior of the material are considered in their entirety. Modeling incorporates the characteristics of the gas to liquid phase interaction, such as CO₂ composition of the gas phase and interfacial area, the composition of the aqueous phase and its temperature, and compositional and morphological features of the solid. We demonstrate that such an approach is essential when considering proton-limiting conditions that are especially relevant to mineral dissolution under dilute CO₂ conditions in short reaction timeframes. The model is of particular relevance to the use of reactive silicate-based minerals for the aqueous capture of CO₂ from dilute CO₂ gas streams. The model as developed can be used to predict CO₂ capture using heat-activated serpentinite slurries for a given set of operating conditions and should be adaptable for use with other alkaline materials of defined reactivity in similar or varying reaction settings by adequately specifying reaction conditions.]]> Thu 08 Dec 2022 08:53:04 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:12365 Sat 24 Mar 2018 08:18:30 AEDT ]]>