Water retention, hydraulic conductivity of hydrophilic polymers in sandy soil as affected by temperature and water quality

Andry, H.; Yamamoto, T.; Irie, Takahiro; Moritani, Shigeoki; Inoue, Mitsuhiro; Fujiyama, Hideyasu

doi:10.1016/j.jhydrol.2009.04.020

Cited by 123 publications

(82 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…An improvement in the water retention of a sandy soil usually couples with a change in the water-accessible pore structure. As a popular soil additive, superabsorbent hydrogel particles have been proven to efficiently enhance water retention of sandy soils by swelling and hence locking water inside themselves [1][2][3][4][5][6][7][8][9]. However, the extent to which the improvement is also due to the modification of the water-accessible pore structure caused by the presence of the hydrogel particles is yet to be clarified.…”

Section: Introductionmentioning

confidence: 99%

Effect of hydrogel particle additives on water-accessible pore structure of sandy soils: A custom pressure plate apparatus and capillary bundle model

Wei

Durian

2013

Phys. Rev. E

View full text Add to dashboard Cite

To probe the effects of hydrogel particle additives on the water-accessible pore structure of sandy soils, we introduce a custom pressure plate method in which the volume of water expelled from a wet granular packing is measured as a function of applied pressure. Using a capillary bundle model, we show that the differential change in retained water per pressure increment is directly related to the cumulative cross-sectional area distribution f (r) of the water-accessible pores with radii less than r. This is validated by measurements of water expelled from a model sandy soil composed of 2-mm-diameter glass beads. In particular, it is found that the expelled water is dramatically dependent on sample height and that analysis using the capillary bundle model gives the same pore size distribution for all samples. The distribution is found to be approximately log normal, and the total cross-sectional area fraction of the accessible pore space is found to be f 0 = 0.34. We then report on how the pore distribution and total water-accessible area fraction are affected by superabsorbent hydrogel particle additives, uniformly mixed into a fixed-height sample at varying concentrations. Under both fixed volume and free swelling conditions, the total area fraction of water-accessible pore space in a packing decreases exponentially as the gel concentration increases. The size distribution of the pores is significantly modified by the swollen hydrogel particles, such that large pores are clogged while small pores are formed. Disciplines Physical Sciences and Mathematics | PhysicsThis journal article is available at ScholarlyCommons: https://repository.upenn.edu/physics_papers/606 To probe the effects of hydrogel particle additives on the water-accessible pore structure of sandy soils, we introduce a custom pressure plate method in which the volume of water expelled from a wet granular packing is measured as a function of applied pressure. Using a capillary bundle model, we show that the differential change in retained water per pressure increment is directly related to the cumulative cross-sectional area distribution f (r) of the water-accessible pores with radii less than r. This is validated by measurements of water expelled from a model sandy soil composed of 2-mm-diameter glass beads. In particular, it is found that the expelled water is dramatically dependent on sample height and that analysis using the capillary bundle model gives the same pore size distribution for all samples. The distribution is found to be approximately log normal, and the total cross-sectional area fraction of the accessible pore space is found to be f 0 = 0.34. We then report on how the pore distribution and total water-accessible area fraction are affected by superabsorbent hydrogel particle additives, uniformly mixed into a fixed-height sample at varying concentrations. Under both fixed volume and free swelling conditions, the total area fraction of water-accessible pore space in a packing decreases exponentially as the gel concentration ...

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of hydrogel particle additives on water-accessible pore structure of sandy soils: A custom pressure plate apparatus and capillary bundle model

Wei

Durian

2013

Phys. Rev. E

View full text Add to dashboard Cite

show abstract

“…These problems require the use of an integrated approach that includes agronomic water-saving techniques, and appropriate management practices (Huang et al, 2003;Yu et al, 2011). The use of water absorbing polymers (i.e., hydrogels) or superabsorbent polymers (SAPs) such as polyacrylates cross-linked with polyacrylamides (PAM) can effectively improve the top soil's ability to store water available for plant growth and production (Buchholz, 1998;Burke et al, 2010;Yu et al, 2011), and reduce seepage of water, and fertilizer and heavy metal leaching down the soil profile (Lentz, 2007;Qu and Varennes, 2009).Mixing SAPs with soils has been found to (i) decrease soil bulk density (similar to organic matter function) and penetration resistance, (ii) increase soil aggregation, porosity, aeration and water retention capacity (Huttermann et al, 1999;Akhter et al, 2004;Busscher et al, 2009;Bai et al, 2010;Han et al, 2010), (iii) decrease soil saturated hydraulic conductivity and drainage (Abedi-Koupai et al, 2008;Andry et al, 2009;Bhardwaj et al, 2007), and (iv) serve as a source of slow release of nutri- …”

mentioning

confidence: 99%

mentioning

confidence: 99%

“…Mixing SAPs with soils has been found to (i) decrease soil bulk density (similar to organic matter function) and penetration resistance, (ii) increase soil aggregation, porosity, aeration and water retention capacity (Huttermann et al, 1999;Akhter et al, 2004;Busscher et al, 2009;Bai et al, 2010;Han et al, 2010), (iii) decrease soil saturated hydraulic conductivity and drainage (Abedi- Koupai et al, 2008;Andry et al, 2009;Bhardwaj et al, 2007), and (iv) serve as a source of slow release of nutri-ents, and reduce plant sensitivity to soil salinity (Liu et al, 2006;Teodorescu et al, 2009;Dorraji et al, 2010;Qu and Varennes, 2009). The application of SAP increased soil water content at field capacity and at permanent wilting point, which may lead to a considerable increase in available water content in soils of different texture used under various crops' management (Karimi et al, 2009;Agaba et al, 2010;Shahid et al, 2012;Banedjschafie and Durner, 2015;Montesano et al, 2015).…”

mentioning

confidence: 99%

See 1 more Smart Citation

Superabsorbent Polymer Properties and Concentration Effects on Water Retention under Drying Conditions

Jian¹,

Shi²,

Ma³

et al. 2017

Soil Science Society of America Journal

View full text Add to dashboard Cite

Superabsorbent polymer (SAP) efficiency in water absorption and release depends on soil properties and SAP type and concentration. Our objective was to examine the effects of soil texture, SAP concentration and properties on water absorption and release from soil-SAP mixtures during 10 h of drying. Four SAP types, five SAP concentrations, and five soils were used. Initial water quantity absorbed by SAPs (53-171 g g -1 of SAP) was more than two orders of magnitude greater than that absorbed by soils (0.35-0.53 g g -1 of soil). Water absorption by soil-SAP mixtures (i) significantly improved water holding capacity relative to the soil, and (ii) increased with an increase in SAP concentration and soil clay content. The ability of soil-SAP mixtures to retain water after 5 h of drying relative to the initial water content was greater than that of the soils alone, especially in coarse-textured soils. After 5 h of drying, the specific amount of water retained by a unit weight of SAP in the soil-SAP mixture was higher than that at 0 h. This observation suggests a continued absorption of water by SAPs from soils during the first 5 h of drying. The fraction of water loss from SAP with large-size beads (BJ-2101M) was smallest in all the mixtures among the four SAPs after 10 h drying. Our results showed that addition of SAPs to soils not only decreases water loss to evaporation from soils but also from the SAPs, especially for a SAP with large size beads.Abbreviations: SAP, superabsorbent polymer; EC, electrical conductivity; SAR, sodium adsorption ratio. M any soils from arid and semiarid regions having low clay and organic matter contents are characterized by low water holding capacity and poor efficiency of water and fertilizer use by crops. These problems are aggravated in Northwest China where summer temperatures are high, and rainfall is characterized by irregular distribution and high intensity, shorter duration of rain thus causing a large portion of the rain water to drain deep below the root zone (Wang et al., 2002;Fan et al., 2005). These problems require the use of an integrated approach that includes agronomic water-saving techniques, and appropriate management practices (Huang et al., 2003;Yu et al., 2011). The use of water absorbing polymers (i.e., hydrogels) or superabsorbent polymers (SAPs) such as polyacrylates cross-linked with polyacrylamides (PAM) can effectively improve the top soil's ability to store water available for plant growth and production (Buchholz, 1998;Burke et al., 2010;Yu et al., 2011), and reduce seepage of water, and fertilizer and heavy metal leaching down the soil profile (Lentz, 2007;Qu and Varennes, 2009).Mixing SAPs with soils has been found to (i) decrease soil bulk density (similar to organic matter function) and penetration resistance, (ii) increase soil aggregation, porosity, aeration and water retention capacity (Huttermann et al., 1999;Akhter et al., 2004;Busscher et al., 2009;Bai et al., 2010;Han et al., 2010), (iii) decrease soil saturated hydraulic conductivity and drainag...

show abstract

“…Hydrophilic polymers are used in horticulture and agriculture praxis as water absorbents for better water support of plants with partial water defi ciency (REHMAN et al, 2011;ANDRY et al, 2009). Other authors recommend hydrophilic polymers for replanting to decrease water stress (WROBLEWSKA et al, 2012;RUTHROF et al, 2010).…”

mentioning

confidence: 99%

Influence of hydrogel on germination of lettuce and onion seed at different moisture levels

Pazderů

Koudela

2013

Acta Univ. Agric. Silvic. Mendelianae Brun.

View full text Add to dashboard Cite

PAZDERŮ KATEŘINA, KOUDELA MARTIN: Infl uence of hydrogel on germination of lettuce and onion seed at diff erent moisture levels. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2013, LXI, No. 6, pp. 1817-1822 The infl uence of Agrisorb (water solution 1, 3, 5 g/l) on lettuce and onion seed germination was tested in diff erent moisture conditions (30 ml and 15 ml of water in germination box). Variants with reduced water level germinated much more slowly (MGT parameter) than standard variants, though diff erences in total germination at the end of the test were insignifi cant. Treated variants of lettuce seeds showed a statistically signifi cant increase in germination energy (GE) on the fi rst day (GE1, both water levels), but a signifi cant decrease on the second day (columns GE2, 15 ml). Higher doses of Agrisorb slowed lettuce seed germination (GE2, 30 ml, dose 5 g) signifi cantly, similarly see GE2 (15 ml, doses 1, 3, 5 g). This slowdown was apparent for GE3 (both water amount) as well. A similar but insignifi cant eff ect was evident for onions. There was an infl uence of cultivar and seed vigour on sensitivity to water stress. The hydrogel application infl uenced germination of lettuce and onion seeds. Treated lettuce seeds germinated faster than non-treated control in the beginning of germination process. This eff ect was not recorded in case of slowly germinated onion seed lots. Although infl uence of Agrisorb was positive in the beginning, higher doses of hydrogel reduced germination energy of treated seed lots (for example GE2, GE4) of both crops in comparison with non-treated control. Higher doses of hydrogel caused longer MGT of lettuce and onion as well.

show abstract

Water retention, hydraulic conductivity of hydrophilic polymers in sandy soil as affected by temperature and water quality

Cited by 123 publications

References 15 publications

Effect of hydrogel particle additives on water-accessible pore structure of sandy soils: A custom pressure plate apparatus and capillary bundle model

Effect of hydrogel particle additives on water-accessible pore structure of sandy soils: A custom pressure plate apparatus and capillary bundle model

Superabsorbent Polymer Properties and Concentration Effects on Water Retention under Drying Conditions

Influence of hydrogel on germination of lettuce and onion seed at different moisture levels

Contact Info

Product

Resources

About