Wastewater Effects on Montmorillonite Suspensions and Hydraulic Properties of Sandy Soils

Tarchitzky, Jorge; Golobati, Y.; Chen, Y.; Keren, R.

doi:10.2136/sssaj1999.03615995006300030018x

Cited by 100 publications

(66 citation statements)

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“…It is assumed that clay dispersion related to higher soil SAR caused by higher sodium loads of the irrigation water is another main effect reducing HC in TWW irrigated soils. This interpretation is in line with findings by Tarchitzky et al (1999) and Warrington et al (2007). The findings of the present study are suggesting a similar effect, as the sodium concentration within the irrigation water were at least similar (GI), but at the other three of the four test sites 3.5 (YO) to 6.5 (RP) times higher in the TWW than in the FW.…”

Section: Discussionsupporting

confidence: 93%

“…But for HC, results obtained from in-situ studies are very scarce, as most studies focused on laboratory experiments only, using soil samples collected in the field (Lado and Ben-Hur, 2010;Levy et al, 1999;Levy et al, 2005;Tarchitzky et al, 1999). The benefits of laboratory studies are the opportunity to control environmental parameters and to gain possibly more accurate results.…”

Section: Discussionmentioning

confidence: 99%

“…Although the general quality of the TWW improved within the last two decades (Lahav et al, 2010;Levy, 2011), total salt concentration and SAR remained mostly unchanged because these properties are not affected by standard treatment methods. Even so, elevated sodicity and additional higher levels of suspended solids and dissolved organic matter (DOM) are associated with additional detrimental effects on soil physical properties like soil structure, soil aggregate stability (SAS), soil water repellency (SWR) (Schacht et al, 2014;Tarchitzky et al, 2007), and consequently, hydraulic conductivity (HC) (Halliwell et al, 2001;Tarchitzky et al, 1999), as well as yield (Maher et al, 2004). This might change in the future due to the increased proportion of provided desalinated FW and the implementation of improved tertiary treatment technologies like reverse osmosis (Brenner, 2012;Lahav et al, 2010;Shannon et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

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Treated wastewater irrigation effects on soil hydraulic conductivity and aggregate stability of loamy soils in Israel

Schacht

Marschner

2015

Journal of Hydrology and Hydromechanics

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Abstract:The use of treated wastewater (TWW) for agricultural irrigation becomes increasingly important in water stressed regions like the Middle East for substituting fresh water (FW) resources. Due to elevated salt concentrations and organic compounds in TWW this practice has potential adverse effects on soil quality, such as the reduction of hydraulic conductivity (HC) and soil aggregate stability (SAS). To assess the impact of TWW irrigation in comparison to FW irrigation on HC, in-situ infiltration measurements using mini disk infiltrometer were deployed in four different long-term experimental orchard test sites in Israel. Topsoil samples (0-10 cm) were collected for analyzing SAS and determination of selected soil chemical and physical characteristics.The mean HC values decreased at all TWW sites by 42.9% up to 50.8% compared to FW sites. The SAS was 11.3% to 32.4% lower at all TWW sites. Soil electrical conductivity (EC) and exchangeable sodium percentage (ESP) were generally higher at TWW sites. These results indicate the use of TWW for irrigation is a viable, but potentially deleterious option, as it influences soil physical and chemical properties.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Treated wastewater irrigation effects on soil hydraulic conductivity and aggregate stability of loamy soils in Israel

Schacht

Marschner

2015

Journal of Hydrology and Hydromechanics

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“…As discussed above, salinisation of soil through the application of irrigation water will high salinity and the subsequent effect on clay in the soil is one mechanism that reduces the hydraulic conductivity. Other wastewater characteristics that have been identified to reduce hydraulic conductivity include the present of suspended solids (Magesan et al 2000), nutrients which cause excess growth of microorganisms in the soil (Magesan et al 1999) or interaction of dissolved organic matter with the soil profile (Tarchitzky et al 1999).…”

Section: Salinitymentioning

confidence: 99%

Reuse of effluent water—benefits and risks

Toze

2006

Agricultural Water Management

571

285

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There is an increasing trend to require more efficient use of water resources, both in urban and rural environments. A major mechanism that can be used to achieve greater efficiencies is the reuse of water that once would have been discarded into the environment after use. The reuse of water for agricultural irrigation is often viewed as a positive means of recycling water due to the potential large volumes of water that can be used. Recycled water can have the advantage of being a constant, reliable water source and reduces the amount of water extracted from the environment. In addition, in some cases treatment requirements may be need to be less than for water used in an urban environment due to less potential human contact. There are concerns and unknowns, however, about the impact of the quality of the recycled water, both on the crop itself and on the end users of the crops. Water quality issues that can create real or perceived problems in agriculture include nutrient and sodium concentrations, heavy metals, and the presence of contaminants such as human and animal pathogens, pharmaceuticals and endocrine disruptors. Social attitudes to the use of crops that have been irrigated with recycled waters and the resulting impact on market value of crops are also a major consideration. This paper will discuss the benefits from using different types of recycled water and outline the current knowledge and opinions relating to risks such as water quality issues. KeywordsWastewater, recycling, soil, contaminants, pathogens, irrigation IntroductionIncreasing efficiencies in crop management and the continuing increases in crop yields has increased demands on water resources for irrigation purposes. Effluents are reused for irrigation purposes in many countries around the world on all of the populated continents (USEPA 1992). A number of these countries have developed guidelines that give quality criteria and advice on how effluents should reused for irrigation purposes. Examples of these guidelines are summarised in the USEPA guidelines for water reuse manual (USEPA 1992).

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“…The reduction in hydraulic conductivity is due to the retaining of the organic matters during infiltration and the change of pore size distribution as a result of expansion and dispersion of soil particles. Tarenitzky et al (1999) showed that one of the important effects of adding organic matters to soil is the increase of moisture retention capacity which is due to reduction of the soil bulk density, increase of soil porosity and the specific surface area of soil particles.…”

mentioning

confidence: 99%

Effect of treated wastewater on soil chemical and physical properties in an arid region

Koupaei¹,

Mostafazadeh‐Fard²,

Afyuni³

et al. 2006

Plant Soil Environ.

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This study was carried out to investigate the effect of treated wastewater on soil chemical and physical properties. Field experiment was conducted in Borkhar region in Isfahan province in central Iran with two water treatments of wastewater and groundwater under sprinkler and surface irrigation systems for three crops of sugar beet, corn and sunflower. Soil samples were collected to 120 cm depth to determine concentration of lead (Pb), manganese (Mn), iron (Fe), cadmium (Cd), nickel (Ni), cobalt (Co), copper (Cu) and zinc (Zn). Irrigation systems had no significant effect on extractable heavy metals in soil. The accumulation of Pb, Mn, Ni and Co in the soil increased significantly in the wastewater treatment as compared to the groundwater treatment. The accumulation of Pb, Mn, Ni, Co, Cu and Zn decreases with the soil depth. Treated wastewater showed no effect on the increase of Fe, Cd, Ni, Cu and Zn during growing season. The irrigation system had a significant effect on infiltration rate, bulk density and total porosity. Under sprinkler irrigation system the infiltration rate increased significantly.

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Wastewater Effects on Montmorillonite Suspensions and Hydraulic Properties of Sandy Soils

Cited by 100 publications

References 0 publications

Treated wastewater irrigation effects on soil hydraulic conductivity and aggregate stability of loamy soils in Israel

Treated wastewater irrigation effects on soil hydraulic conductivity and aggregate stability of loamy soils in Israel

Reuse of effluent water—benefits and risks

Effect of treated wastewater on soil chemical and physical properties in an arid region

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