https://ogma.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:51801 Wed 28 Feb 2024 14:45:56 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:41127 Wed 27 Jul 2022 09:39:25 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:55935  urban (4.05) > rural (3.83) > coastal (2.41). This research outcome will provide a foundation for future research on metal(loid)s and will help in pertinent policy-making by the relevant authorities in Bangladesh.]]> Wed 10 Jul 2024 09:25:10 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:49313 Wed 07 Feb 2024 15:04:29 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:53427 Wed 07 Feb 2024 14:39:01 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:49060 Wed 03 May 2023 15:53:57 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:51117 Tue 22 Aug 2023 14:33:23 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:52564 1 has been observed for all age groups from the exposed area and adult male group from the control area. Adults and children from rural area showed that ingestion rate (IR) and concentration are the respective influencing factors towards cooked rice As, whereas IR is solely responsible for all age groups from urban area. A vital suggestion is to reduce the IR of cooked rice for control population to avoid the As-induced health risks. The average intake (μg/day) of micronutrients is in the order of Zn > Se for all the studied populations and Se intake is lower for the exposed population (53.9) compared to the apparently control (140) and control (208) populations. Benefit-risk assessment supported that the Se-rich values in cooked rice are effective in avoiding the toxic effect and potential risk from the associated metal (As).]]> Tue 17 Oct 2023 15:41:25 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:52779 Tue 14 Nov 2023 14:21:49 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:33185 Eisenia fetida in spiked soils by exposing the worms for 28 days following standard procedures. The toxicity studies revealed that Hg exerted less lethal effect on earthworms in acidic soil with higher organic carbon (S-3 soil) where water soluble Hg recovery was very low compared to the water soluble Hg fractions in soils with less organic carbon and higher pH (S-1 and S-2 soils). The concentrations of total Hg that caused 50 % lethality to E. fetida (LC50) after 28 days of exposure in S-1, S-2 and S-3 soils were 152, 294 and 367 mg kg⁻¹, respectively. The average weight loss of E. fetida in three soils ranged from 5 to 65 %. The worms showed less weight loss in the organic carbon-rich soil (S-3) compared to less organic carbon containing soils (S-1 and S-2). The bioconcentration of Hg in E. fetida increased with increased Hg concentrations. The highest bioaccumulation took place in the acidic soil with higher organic carbon contents with estimated bioaccumulation factors ranging from 2 to 7.7. The findings of this study will be highly useful for deriving a more robust soil ecological guideline value for Hg.]]> Tue 11 Sep 2018 12:15:44 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:51435 Tue 05 Sep 2023 17:54:57 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:43892 Tue 04 Oct 2022 13:59:39 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:52134 Tue 03 Oct 2023 18:27:57 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:34213 Cu > Cd, Zn, Cr. The corresponding values for furnace slag were 4.3 to 5.2 mg/g, and the order of adsorption capacities was Pb, Cu, Cd > Cr > Zn. Fixed-bed column study on furnace slag/sand mixture (1:1 w/w) revealed that the adsorption capacities were generally less in the mixed metal system (1.1-2.1 mg/g) than in the single metal system (3.4-3.5 mg/g). The data for both systems fitted well to the Thomas model, with the adsorption capacity being the highest for Pb and Cu in the single metal system and Pb and Cd in the mixed metal system. Our study showed that fly ash and blast furnace slag are effective low-cost adsorbents for the simultaneous removal of Pb, Cu, Cd, Cr and Zn from water.]]> Thu 28 Oct 2021 13:03:23 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:47297 Thu 27 Jul 2023 11:25:51 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:30385 Thu 27 Jan 2022 15:57:14 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46516 95%) than mulch nos. 1 and 3, which could be attributed to the retention of numerous PAHs in its interlayers, preventing its movement into the underlying soil, environment and atmosphere.]]> Thu 24 Nov 2022 16:04:26 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:29605 week 4 > week 3 > week 2. On the other hand, under the 50 % FC loading rate treatments, the highest N₂O emission was recorded in the first few weeks and in the following order: week 1 > week 2 > week 3 > week > 4. Since N₂O is a greenhouse gas with high global warming potential, its emission from wastewater irrigation is likely to impact global climate change. Therefore, it is important to examine the effects of abattoir wastewater irrigation on soil for N₂O emission potential.]]> Thu 21 Oct 2021 12:53:23 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:50334 Thu 20 Jul 2023 08:37:09 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:43309 Thu 15 Sep 2022 14:01:43 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:24911 Thu 14 Apr 2022 11:05:18 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:34818 Thu 14 Apr 2022 11:00:55 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:27862 Sat 24 Mar 2018 07:41:11 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:29927 Cucumis sativa L. (cucumber) focusing primarily on pore-water Pb data from 10 different soils after 12 weeks ageing. Phytotoxicity expressed in terms of Pb²⁺ was observed to occur in the nanomolar range in neutral to alkaline soils (EC50 values 90 to 853 nM) and micromolar levels for acidic soils (EC50 values 7.35 to 9.66 μM). Internal Pb concentrations relating to toxicity (PT50) in roots and shoots also decreased with increasing pore-water pH (R² = 0.52 to 0.53). From a series of dose-response studies, we developed transfer functions predicting Pb uptake in C. sativa and we validated these functions with long-term Pb contaminated soils. The significant independent parameters were pore-water Pb²⁺ and dissolved Pb plus dissolved organic carbon (DOC). The observed RMSE for the Pb-DOC model and Pb²⁺ were 2.6 and 8.8, respectively. The Pb-DOC model tended to under-predict Pb, whilst Pb²⁺ tended to over-predict accumulation despite reasonable RMSE values. Further validation is needed in soils with higher pore-water Pb solubility.]]> Sat 24 Mar 2018 07:30:55 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:29802 Atriplex nummularia, Atriplex semibaccata, Salsola kali, Phragmites australis and Medicago sativa, representing the taxonomic orders Caryophyllales, Poales and Fabales are evaluated in terms of phytoremediation in this review. Phytoremediation processes, microbial and algal bioremediation, the use and implication of tissue culture and biotechnology are critically examined. Overall, an integration of available remediation plant-based technologies, referred to here as ‘integrated remediation technology,’ is proposed to be one of the possible ways ahead to effectively address problems of toxic heavy metal pollution.]]> Sat 24 Mar 2018 07:30:34 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:25418 Sat 24 Mar 2018 07:27:22 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:24017 Sat 24 Mar 2018 07:16:45 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:24311 Sat 24 Mar 2018 07:14:39 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:24555 Eisenia fetida, and the soil health was investigated. C-nZVI at concentration level of 3 g kg^-1 soil showed no effect on the survival of E. fetida in the three soil types. However, varying effects such as concentration-dependent increase in tissue iron concentration, lipid peroxidation, and damage to DNA molecules by C-nZVI were observed. C-nZVI at an exposure concentration of 60 mg kg^-1 soil induced oxidative stress in E. fetida. Tissue Fe concentration appeared correlated to the DNA damage. Oxidative stress and DNA damage may explain the toxicity mechanisms of nZVI to E. fetida.]]> Sat 24 Mar 2018 07:11:31 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:24686 Sat 24 Mar 2018 07:10:54 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:24051 Chlorella sp., were investigated using different phosphate levels. The results indicated that arsenate was highly toxic than arsenite to the alga, and the phosphate limitation in growth media greatly enhanced arsenate toxicity. The uptake of arsenate in algal cells was more than that of arsenite, and the predominant species in the growth media was arsenate after 8 days of exposure to arsenite or arsenate, indicating arsenite oxidation by this microalga. Arsenate reduction was also observed when the alga was incubated in a phosphate-limiting growth medium. Similar to the process of biotransformation, the alga accumulated more arsenic when it was exposed to arsenate and preferably more in a phosphate-limiting condition. Although phosphate significantly influences the biotransformation and bioaccumulation of arsenic, the oxidizing ability and higher accumulation capacity of this alga have great potential for its application in arsenic bioremediation.]]> Sat 24 Mar 2018 07:09:36 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:36508 Rhodopseudomonas palustris C₁ and Rubrivivax benzoatilyticus C₃₁ to ameliorate As toxicity and to reduce As uptake in rice. Strain C₁ was superior to strain C₃₁ for siderophore production. The mixed culture (1: 1) was most effective in reducing the toxicity of As species [As(III) and/or As(V), each 30 mg/l] by yielding maximal germination index that related to α- and β-amylase activities in two Thai rice cultivars (HomNil: HN and PathumThani 1: PT). Arsenic toxicity to the seed germination followed the order: mixed As species > As(III) > As(V); and the toxicity was reduced in inoculated sets, particularly with a mixed culture. The mixed culture significantly enhanced rice growth under As stress in both rice cultivars as indicated by an increase in the production of chlorophyll a and b, and also supporting the non-enzymatic (carotenoids, lipid oxidation, and nitric oxide) and enzymatic (superoxide dismutase, ascorbate peroxidase, catalase, and glutathione reductase) activities. These were concomitant with productions of 5-aminolevulinic acid, indole-3-acetic acid, exopolymeric substances, and siderophores which significantly reduced As accumulation in treated rice. It can be concluded that the mixed culture has great potential to ameliorate rice from As toxicity by preventing As species entry into rice for enhancing rice growth and also for reducing As accumulation to produce safe rice from rice grown in contaminated paddy fields.]]> Mon 25 May 2020 12:29:48 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:44838 Zea mays L. as test crop. In the alkaline MGB soil, the availability of Cd was reduced, while that of As increased. An opposite behaviour was observed in the acid KPD soil. All amendments, when added to KPD soil, increased pH and consequently reduced the mobility of Cd and increased the mobility of As. In MGB, the amendment addition had an effect only on As mobility and bioavailability, which increased likely as a result of the increased competition for adsorption with DOC released by organic compounds. These trends were confirmed by the amounts of Cd and As uptaken by maize plants.]]> Mon 24 Oct 2022 10:48:36 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:35378 adj) and the F-test. The results revealed that the R² proportion was greater than 0.96 for BTEX removal efficiency. The statistical analysis demonstrated that the BTEX removal efficiency was significantly correlated with the temperature, BTEX concentration, voltage, and flow rate. Voltage was the most influential variable affecting the dependent variable as it exerted a significant effect (p < 0.0001) on the response variable. According to the achieved results, NTP can be applied as a progressive, cost-effective, and practical process for treatment of airstreams polluted with BTEX in conditions of low residence time and high concentrations of pollutants.]]> Mon 22 Jul 2019 13:12:18 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:32295 Mon 21 May 2018 15:30:58 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:55065 Mon 08 Apr 2024 13:13:26 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:42616 Fri 26 Aug 2022 15:54:25 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:43390 Fri 16 Sep 2022 09:37:21 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:51736 Fri 15 Sep 2023 18:07:04 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:40054 Fri 15 Jul 2022 10:02:32 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:49381 Fri 12 May 2023 14:27:16 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:49796 Fri 02 Jun 2023 17:06:13 AEST ]]>