https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:52603 Wed 18 Oct 2023 13:37:49 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:26286 -1 (range = 1.5-201 µg·L^-1). Fifty three percent groundwater samples showed higher As value than WHO safe limit of 10 µg·L^-1. Speciation of As in groundwater samples (n = 13) showed the presence of inorganic As only; arsenite (As(III)) constituted 13%-67% of total As and arsenate (As(V)) ranged from 33% to 100%. For As health risk assessment, the hazard quotient and cancer risk values were 11-18 and 46-600 times higher than the recommended values of US-EPA (i.e., 1.00 and 10^-6, respectively). In addition to As, various water quality parameters (e.g., electrical conductivity, Na, Ca, Cl¯, NO₃¯, SO₄²¯, Fe, Mn, Pb) also enhanced the health risk. The results show that consumption of As-contaminated groundwater poses an emerging health threat to the communities in the study area, and hence needs urgent remedial and management measures.]]> Wed 11 Apr 2018 15:52:32 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:45433 Wed 07 Feb 2024 15:16:06 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:37207 Wed 05 Apr 2023 10:18:29 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46968 Tue 30 Apr 2024 09:39:02 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:47649 90 m (23 μg L−1) depths. Piper-plot elucidated that the aqueous chemistry was dominated with Na-SO4, Na-Ca-SO4, Na-Mg-SO4 type saline water. Principal component analysis grouped As concentration with well depth, pH, salinity, Fe and CO3, exhibiting that these hydrogeochemical factors could have potential role in controlling As release/sequestration into the aquifers of study area. Geochemical modeling showed positive saturation indices only for iron (Fe) oxide-phases, indicating Fe oxides as the major carriers of As. Overall, this study provides insights to tackle emerging As threat to the communities in Punjab, Pakistan, as well as help develop suitable management/mitigation strategies – based on the baseline knowledge of As levels/species and factors governing As contamination in the study area.]]> Tue 24 Jan 2023 14:58:34 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:47026 Tue 13 Dec 2022 12:58:24 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:35935 9882 groundwater samples) were used to describe As variability in groundwater of Pakistan and for comparison with global data. The mean groundwater As content reported in these studies was 120 µg/L (range: 0.1-2090 µg/L; SD: ±307). About 73% of the values for mean As contents in the 43 studies were higher than the World Health Organization (WHO) permissible limit (10 µg/L) for drinking water, while 41% were higher than the permissible limit of As in Pakistan (50 µg/L). It was observed that groundwater samples in some areas of Punjab and Sindh provinces contained high As concentrations which were almost equal to concentrations reported in the most contaminated areas of the world. We predicted that the mean values of ADD, HQ and CR were 4.4 µg kg^-1day^-1(range: 0-77 µg kg^-1day^-1), 14.7 (range: 0-256) and 0.0029 (range: 0-0.0512), respectively, based on mean As concentrations reported in Pakistan. In addition, this article proposes some integrated sustainable solutions and future perspectives keeping in view the regional and global context, as well as the on-ground reality of the population drinking As-contaminated water, planning issues, awareness among civil society and role of the government bodies. Based on available data, it is predicted that almost 47 million people in Pakistan are residing in areas where more than 50% of groundwater wells contain As concentrations above the WHO recommended limit of As in drinking water.]]> Thu 14 Apr 2022 10:59:13 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:48853 Thu 13 Apr 2023 09:52:55 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:24355 2+ was used to describe phytotoxicity of cucumber (Cucumis sativa L) in 10 contrasting soils at different soil Cu loadings. Both soil solution Cu (Cu_pw) and Cu²⁺ successfully described the response variable for all ten soils with R² values of 0.73 and 0.66, respectively. Separation of soils as acid and alkaline and fitting separately showed that there was a strongly significant fit for both log Cu²⁺ and log Cu_pw in acidic soils (R² = 0.92 and 0.86, respectively) but weakly significant fit for alkaline soils. The pCu EC₅₀ and EC₁₀ values in all acidic soils for cucumber were 5.83 (6.03–5.63) and 7.53 (8.27–7.00), respectively. In our dataset alkaline soils need to be treated individually. In addition, pCu could be predicted based on pH and total concentration alone. Despite only 12 weeks ‘ageing’ there was quantitative agreement between pCu model from this study and predicted pCu from Sauvé et al. This agreement from studies performed independently indicates that, at least in the case of Cu²⁺, the difference in an ageing period of ≥10 years appears minimal.]]> Sat 24 Mar 2018 07:10:17 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:35882 Fri 10 Jan 2020 10:06:23 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:55258 Fri 03 May 2024 15:23:06 AEST ]]>