https://ogma.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:47139 Wed 14 Dec 2022 15:20:30 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:51675  10−4) for both adults and children, indicating lifetime cancer risk due to the consumption of contaminated vegetables. The target hazard quotient (THQ) of each heavy metal was THQ < 1.0 (except Ni in few samples), indicating that consumers have no non-cancer risk when exposed to a single heavy metal. However, hazard index (HI) values of heavy metals were greater than unity in contaminated WC and AW for adults and children. Meanwhile, WC, AW, and SP samples for children emerged as potential health risks of inhabitants in the studied areas. The outcomes of the present investigation might assist the regulatory bodies concerned in setting new strategies through monitoring the quality of marketed vegetables to minimize the risks to humans.]]> Wed 13 Sep 2023 13:30:19 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:30445 Wed 11 Apr 2018 14:33:33 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:49073 Wed 03 May 2023 16:07:56 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:39889 3 and HClO₄ at 2:1). Concentrations of heavy metals were determined using atomic absorption spectrophotometer (AAS). Principal component analysis (PCA) was performed to reduce multidimensional space of variables and samples. Observed mean concentrations of Cd, Co, Cr, Cu, Mn, Ni, Pb, and Zn were 164, 33.4, 295, 336, 634, 236, 1572, and 546 mg kg−1, respectively. Mean concentrations of all the heavy metals in urban area soil were higher than the WHO permissible limits. Correlation coefficient analysis showed positive correlation among Cd, Co, Cu, Ni, and Pb, whereas no obvious correlation for Cr and Mn was found with any other heavy metal. Zn was positively correlated with Co, Ni, and Mn, whereas negative correlation was found with Cr. Results showed that Pir Wadhai and COD were the most and least contaminated parts of the city, respectively, and this is attributed to the presence and absence of heavy traffic loads and industrial effluents.]]> Thu 21 Jul 2022 09:55:28 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:5053 Sat 24 Mar 2018 07:48:42 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:29856 Mycobacterium gilvum VF1 in the presence of a palmitic acid (PA)-grafted Arquad® 2HT-75-based organobentonite in cadmium (Cd)-phenanthrene co-contaminated water. The PA-grafted organobentonite (ABP) adsorbed a slightly greater quantity of Cd than bentonite at up to 30 mg L^{− 1} metal concentration, but its highly negative surface charge imparted by carboxylic groups indicated the potential of being a significantly superior adsorbent of Cd at higher metal concentrations. In systems co-contained with Cd (5 and 10 mg L^{− 1}), the Arquad® 2HT-75-modified bentonite (AB) and PA-grafted organobentonite (ABP) resulted in a significantly higher (72–78%) degradation of phenanthrene than bentonite (62%) by the bacterium. The growth and proliferation of bacteria were supported by ABP which not only eliminated Cd toxicity through adsorption but also created a congenial microenvironment for bacterial survival. The macromolecules produced during ABP–bacteria interaction could form a stable clay-bacterial cluster by overcoming the electrostatic repulsion among individual components. Findings of this study provide new insights for designing clay modulated PAH bioremediation technologies in mixed-contaminated water and soil.]]> Sat 24 Mar 2018 07:40:45 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:29623 Zn (37.3%) > Cu (15.4%) > Pb (1.7%) and is consistent to earlier findings. There was no significant correlation between litter samples and concentration of metals in worm tissue. However, the bioavailability percent for copper in all samples are dominant except for Acacia pycnantha leaf litter being the lowest 90.9%. Earthworm reproduction test revealed that even with a high copper concentration in all samples, Eucalyptus camaldulensis litter produced the highest juvenile count (160%). Evidently, earthworms are seen to reproduce well even in contaminated litter irrespective of level of metal content. Our findings suggest that there are various risks associated with metal transfer and pollution through plant and animal litter in ecosystem and should be appropriately managed.]]> Sat 24 Mar 2018 07:32:13 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:24070 + with metal ions to the surface sites and a decrease in metal ion precipitation as hydroxides at high pH levels. In addition, the heavy metal retention isotherm over a wide range of concentrations for the bentonite follows Temkin and Langmuir adsorption models while Freundlich and Langmuir models for the kaolin. Interestingly, at a high concentration of 10 mM, the Pb precipitation unlikely occurs in the presence of both clays tested over a wide range pH level (< 10), whereas it likely takes place in case of Cu and Zn.]]> Sat 24 Mar 2018 07:09:39 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:45523 Mon 31 Oct 2022 14:16:56 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:47900 Mon 06 Feb 2023 14:13:54 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:55479 1), indicating the lower quality of fruits due to the higher amount of lead contents. The calculated incremental lifetime cancer risks (ILCRs) of cadmium (Cd) and Pb in banana, apple, grape, orange, and pomegranate for both children and i adults were exceeded the threshold limit (ILCR>10−6), which suggests that the consumption of heavy metal contaminated fruits poses potential cancer risks to the human health. In contrast, target hazard quotients (THQs) and chronic hazard index (HIs) values of all heavy metals were in the range of (THQ: 2.4 × 10−6–0.76; 6.5 × 10−7–0.20) and (HI:0.03–0.49; 0.01–0.13), respectively, for children and adults, which were below the acceptable limit (THQ<1), indicating no potential non-cancer risk for both consumer groups. These findings might help the policymakers and regulatory bodies concerned to apply control measures through monitoring the quality of locally grown or imported fruits available in supermarkets for human consumption.]]> Mon 03 Jun 2024 16:12:44 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:44719 Fri 21 Oct 2022 09:53:38 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:51495 Fri 08 Sep 2023 11:58:00 AEST ]]>