https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:52614 La-Euchar >goethite >HDPB-Z >HDPC-M. Birnessite exhibited great affinity for As and drastically reduced As extractability by more than 90% in all single extractions. The results revealed that HDPC-M, HDPB-Z, La-Euchar, birnessite, and goethite are promising immobilizing agents for in situ stabilization of As in terrestrial environments.]]> Wed 18 Oct 2023 13:47:13 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:36981 Mon 27 Jul 2020 10:07:42 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:39222 +-M) and hexadecylpyridinium bromide modified zeolite (HDPy⁺-Z) were used to measure Sb(III) uptake from solutions containing 0.5–2.5 mM antimonite. Adsorption isotherms of antimonite were studied using the Langmuir and Freundlich equations. Adsorption kinetics were investigated using pseudo-first-order, pseudo-second-order, Elovich and intra-particle diffusion models. The results of X-ray diffraction showed a large interlayer expansion for HDPy⁺-M, whereas the X-ray patterns of HDPy⁺-Z remained unchanged. Uptake of Sb(III) by both HDPy⁺-M and HDPy⁺-Z could be fitted well to the Langmuir isotherm, while the kinetics of adsorption could be described well using the pseudo-second-order model. Maximum adsorption capacities for Sb(III) uptake by HDPy⁺-M and HDPy⁺-Z were calculated to be 108.7 and 61.34 mg g⁻¹, respectively. The results of the kinetic studies revealed that Sb(III) adsorption to HDPy⁺-Z was found to be quite fast and the reaction reached equilibrium in 8 h, whereas for HDPy⁺-M equilibration was attained within 24 h. The adsorption of antimonite onto both HDPy⁺-M and HDPy⁺-Z was found to be selective in the presence of Cl⁻¹ and SO4⁻² competitive anions. Considering the high affinity for Sb(III) uptake from solutions containing high concentrations of antimonite, both HDPy⁺-M and HDPy⁺-Z could be used as promising adsorbents for environmental applications.]]> Fri 27 May 2022 11:44:31 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:36535 Fri 16 Feb 2024 15:39:29 AEDT ]]>