Absorption and desorption of liquid water by a superabsorbent polyelectrolyte: Role of polymer on the capacity for absorption of a ground

Bakass, M.; Mokhlisse, A.; Lallemant, M.

doi:10.1002/app.1992

Cited by 17 publications

(14 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…We studied the optimal proportions allowing the best retention of water in the melange of the soil and the polymer to prolong the storage period of water in the soil 5. We also studied the effect of certain ions and the pH on the capacity for absorption of the polymer.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Absorption and desorption of liquid water by a superabsorbent polymer: Effect of polymer in the drying of the soil and the quality of certain plants

Bakass¹,

Mokhlisse²,

Lallemant³

2001

J of Applied Polymer Sci

Self Cite

135

View full text Add to dashboard Cite

ABSTRACT:In this work, we were interested in the study of the kinetic behavior of the reaction of drying soil representing the Marrakesh region (south of Morocco) in the presence of an superabsorbent polymer. The presence of a polymer in the soil diminished the kinetic drying of the soil, which will have as an application a reduction in water loss in the process of irrigation. The presence of a polymer in the soil enables a complete modification of the kinetic regimes controlling the soil-drying kinetic. We also realized the first study of the behavior of certain selected plants in the melange of a soil and a polymer.

show abstract

Section: Introductionmentioning

confidence: 99%

“…We also studied the effect of certain ions and the pH on the capacity for absorption of the polymer. The polyelectrolyte gels swell much less in the presence of monovalent salt and can even collapse in the presence of multivalent ions 5. These ions can be naturally present in the soil or introduced by the use of manure and pesticides.…”

Section: Introductionmentioning

confidence: 99%

Absorption and desorption of liquid water by a superabsorbent polymer: Effect of polymer in the drying of the soil and the quality of certain plants

Bakass¹,

Mokhlisse²,

Lallemant³

2001

J of Applied Polymer Sci

Self Cite

135

View full text Add to dashboard Cite

show abstract

“…These inconsistent results could be ascribed to a variation in soil and SAP properties, and the specific conditions during the experiments, such as wetting-drying intensity, type of SAP and SAP particle size, irrigation water quality (level of salinity and the composition of the ions present) and crop species ( James and Richard, 1986;Wang and Gregg, 1989;Salem et al, 1991;Bakass et al, 2000;Koupai et al, 2008;Xie et al, 2009;Bai et al, 2013;Langaroodi et al, 2013).…”

mentioning

confidence: 99%

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

“…Il est préparé à partir de l'acide acrylique et peut absorber jusqu'à 1000 fois son poids en eau. En effet, en présence de l'eau liquide, le polymère se gonfle instantanément et rapidement pour donner naissance à un gel polyélectrolytique mou et transparent [14,15]. L'aspect général du polymère se présente sous forme de sphères déformées et l'aspect surfacique est non poreux.…”

Section: éChantillonunclassified

Étude thermodynamique du polymère super absorbant X10 vis–à–vis de l’eau vapeur

et al. 2004

Self Cite

View full text Add to dashboard Cite

Abstract. The organic polymers super absorbents present values of specific surface lower than 2m 2 /g. The isobars of adsorption of water vapor on studied polymer are of type III at ambient temperature with the hysterisis phenomena. For temperatures lower than ambient, the isobars become deformed because of an effect of chains. This type of polymer is characterized by a multi-layer adsorption which occurs before the full-course one is complete. During reactions of adsorption, the polymer undergoes rearrangement polymeric network which results from a co-operative diffusion of the water molecules and from a spacing of chain followed by an expansion of the polymeric network. Three types of water molecules adsorbed on polymer were identified: strongly dependent water, adsorbed water and the water only trapped between the macromolecular chains.

show abstract

Absorption and desorption of liquid water by a superabsorbent polyelectrolyte: Role of polymer on the capacity for absorption of a ground

Cited by 17 publications

References 14 publications

Absorption and desorption of liquid water by a superabsorbent polymer: Effect of polymer in the drying of the soil and the quality of certain plants

Absorption and desorption of liquid water by a superabsorbent polymer: Effect of polymer in the drying of the soil and the quality of certain plants

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

Étude thermodynamique du polymère super absorbant X10 vis–à–vis de l’eau vapeur

Contact Info

Product

Resources

About