Impact of irrigation wastewater pH on saturated hydraulic conductivity of acidic, neutral, and alkaline Kaolinitic soils
Presentation
Paper/Presentation Title | Impact of irrigation wastewater pH on saturated hydraulic conductivity of acidic, neutral, and alkaline Kaolinitic soils |
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Presentation Type | Presentation |
Authors | Ali, Aram (Author), Bennett, John McL (Author), Marchuk, Alla (Author) and Biggs, Andrew (Author) |
Editors | Hulugalle, Nilantha, Biswas, Tapas, Greene, Richard and Bacon, Peter |
Journal or Proceedings Title | Proceedings of the National Soil Science Conference 2018 |
Number of Pages | 2 |
Year | 2018 |
Place of Publication | Bridgewater, SA, Australia |
ISBN | 9780646997230 |
Web Address (URL) of Paper | http://www.soilscienceaustralia.org.au/wp-content/uploads/2019/10/Proceedings-Natl.-Soil-Sci-Conf-Canberra-18-23-Nov-2018-FINAL_reduced-size-1.pdf |
Conference/Event | 2018 National Soil Science Conference |
Event Details | 2018 National Soil Science Conference Parent Soil Science Australia National Conference Event Date 18 to end of 23 Nov 2018 Event Location Canberra, Australia |
Abstract | There is an increasing need to use marginal quality water, including industrial treated wastewater and saline and sodic water for irrigating land in arid and semi-arid regions globally. The use of marginal quality of water potentially increases soil structural degradation, decreasing permeability (Bennett 2012; Shainberg et al. 1981), whereby excess sodium (measured as the sodium adsorption ratio, SAR) can result in both intra- and inter-crystalline swelling leading to eventual dispersion (Dang et al. 2018a; Ezlit et al. 2013). Furthermore, this effect can be enhanced or reduced depending on electrical conductivity (EC) of the irrigation water (Dang et al. 2018b). The effect of SAR and EC on saturated hydraulic conductivity (Ks) was classically studied by Quirk and Schofield (1955), with the body of work since identifying that the Ks reduction due marginal quality water depends on soil clay content and mineralogy, soil organic matter, and the electrolyte composition and concentration (Bennett and Raine 2012). However, the effects of marginal water pH and alkalinity on the extent of Ks reduction are less well understood, especially in relation to a soils initial pH and alkalinity. Naturally formed soils usually have a pH ranging from 4 to 10 (Szabolcs 1989), and the soil pH in a specific soil is basically a function of the soil clay minerals, organic portion, associated ion exchange, and hydrolysis reactions (Sumner et al. 1991). The aim of this study was to investigate the impact of different pH and EC of treatment solutions at SAR 20 and 40 on Ks reduction for Kaolinitic soils with different original pH values, enhancing the current understanding of Australian soils. |
Keywords | irrigation wastewater, pH, hydraulic conductivity, soils of different pH |
ANZSRC Field of Research 2020 | 410605. Soil physics |
410699. Soil sciences not elsewhere classified | |
Public Notes | ©Soil Science Society of Australia Inc 2018. No evidence of copyright restrictions preventing deposit of Accepted version. |
Byline Affiliations | Centre for Sustainable Agricultural Systems |
Department of Natural Resources and Mines, Queensland | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q6909/impact-of-irrigation-wastewater-ph-on-saturated-hydraulic-conductivity-of-acidic-neutral-and-alkaline-kaolinitic-soils
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