https://nova.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:39591 Wed 15 Jun 2022 12:47:40 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:39746  Fe (73.6) > Zn (67.8) > Mn (29.9) > Cu (5.7) > Mo (3.7) > Cd (2.8) > Se (2.3) > V (1.9) > Co = As (1.8) > Sb (1.2) > Pb (0.6). TEs displayed high variations within samples, reflecting many sources that control their concentrations in the coastal water. Most TEs displayed elevated concentrations in the east and west of the study area. The Na-Cl water type in the majority of investigated sites indicates excess alkaline elements and strong acid anions relative to alkaline earth cations and weak acid anions. Considering the saturation states of minerals, carbonate and evaporite minerals are oversaturated and unsaturated in surface water, respectively. Compositional interrelations between aqueous species showed that reverse cation exchange may have occurred. The excess SO42− content, derived from irrigation return flow and domestic greywater, probably plays a crucial role in the mobilization and transport of Zn and Pb by binding to sulfate ligands and forming aqueous complexes. Ecological risk assessment of TEs revealed that water in the majority of sites is safe in terms of As, Se, Pb, and Cd content, and unsuitable with respect to Zn and Cu. Acute and chronic toxicities of Cu and Zn are reported in several sites, thus coastal water cannot be used for fishery and protecting “nature reserve” purposes. However, industrial activity and tourism are safe to be conducted in most coastal water sites.]]> Wed 07 Feb 2024 15:26:27 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:39466 ® 2HT-75 (IBA) and further tailored with palmitic acid (IBAP) in order to prepare effective adsorbents. They were used for the removal of perfluorooctane sulfonate (PFOS), phenanthrene (PHE) and copper ions (Cu²⁺) both in single (S) and binary (B) contaminant conditions in simulated and real wastewater. The IB showed a large affinity for Cu²⁺ in both single (q_max: 43.43 mg/L) and binary (q_max: 43.95 mg/L) systems. Adsorption of PFOS and PHE was dramatically enhanced by the functionalized clays IBA (K_{F (PFOS)}: 11.1 and K_{F (PHE)}: 9.65 mg ^(1-n) Lⁿ g⁻¹) and IBAP (K_{F (PFOS)}): 10.2 and K_{F (PHE)}: 16.68 mg ^(1-n) Lⁿ g⁻¹). The co-occurrence of PFOS or PHE with Cu²⁺ enhanced their adsorption onto clays indicating that Cu²⁺ can form bridges between clays and PFOS or PHE in different mechanism to increase adsorption of PFOS or PHE in binary solutions. The surface-tailored organoclay IBAP showed great potential for the complete removal of PFOS, PHE and 86.6% of Cu²⁺ from real wastewater, which is usually considered challenging.]]> Tue 09 Aug 2022 14:29:54 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:40441 S-Zn > S-Pb and C-Zn > T-Cd > C-Pb. PET particles exposed to Zn, Cd, and Pb solution adsorbed from 7.2 to 8.5%, 5.3 to 9.8%, and 29.8 to 68.5% of the initial heavy metals concentration, respectively. 11.3 to 15.2%, 12.5 to 23.35%, and 5.5 to 33.6% of the initially adsorbed Zn, Cd, and Pb were desorbed in the wheat rhizosphere zone in the three defined scenarios, respectively. The results show that PET particles can act as a vector in transferring heavy metals to the rhizosphere zone.]]> Fri 22 Jul 2022 14:31:16 AEST ]]>