Polyelectrolytes and Polycomplexes for Stabilizing Sandy Grounds

Novoskoltseva, Оlga А.; Панова, И. Г.; Лойко, Н. Г.; Nikolaev, Yu. A.; Литманович, Е. А.; Yaroslavov, Alexander A.

doi:10.1134/s1560090421050092

Cited by 10 publications

(6 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Obviously, such doses are not suitable for large-scale anti-deflationary fixation of sands, since in terms of 1 hectare, the formation of a surface soil crust of 0.5–1 cm with a bulk density of desert sand of 1.5 g/cm 3 would require 150–300 kg of dry polymer or 15–30 tons of swollen hydrogel. Therefore, uncrosslinked or weakly crosslinked polyelectrolytes and polycomplexes with a significantly lower cost are more promising for erosion protection [ 21 ]. However, gel-forming soil conditioners organically combine improvements in water retention, dispersity, hydraulic properties, anti-pathogenic, and anti-erosion protection of the soil and have no analogues in their effectiveness of complex positive action in soils at such small active doses.…”

Section: Discussionmentioning

confidence: 99%

“…Small doses of gel conditioners (0.1–0.6% per mass) are sufficient to improve the water-retaining capacity of sands to the level of fertile loamy soils [ 13 , 15 , 17 ]. The same and even smaller doses of gel-forming polymeric materials effectively aggregate the sandy particles and protect them from wind erosion [ 3 , 4 , 5 , 21 ]. An equally promising direction is the use of gel-forming materials as agents for controlled release systems for agrochemicals and pesticides [ 1 ].…”

Section: Introductionmentioning

confidence: 99%

“…), which drastically reduces the efficiency and profitability of gel-forming soil conditioners [ 20 , 26 , 27 , 28 , 29 , 30 ]. Most of the modern scientific developments in this area, unfortunately, neglect these problems and focus only on the chemical synthesis of new materials and the laboratory analysis of some of their properties [ 1 , 2 , 4 , 5 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 ]. As a rule, only the positive effect of conditioners on the soil is analyzed, and the corresponding negative effects of polymeric conditioners on soil factors are completely ignored [ 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Gel-Forming Soil Conditioners of Combined Action: Laboratory Tests for Functionality and Stability

et al. 2022

View full text Add to dashboard Cite

The research analyzes technological properties and stability of innovative gel-forming polymeric materials for complex soil conditioning. These materials combine improvements in the water retention, dispersity, hydraulic properties, anti-erosion and anti-pathogenic protection of the soil along with a high resistance to negative environmental factors (osmotic stress, compression in the pores, microbial biodegradation). Laboratory analysis was based on an original system of instrumental methods, new mathematical models, and the criteria and gradations of the quality of gels and their compositions with mineral soil substrates. The new materials have a technologically optimal degree of swelling (200–600 kg/kg in pure water and saline solutions with 1–3 g/L TDS), high values of surface energy (>130 kJ/kg), specific surface area (>600 m2/g), threshold of gel collapse (>80 mmol/L), half-life (>5 years), and a powerful fungicidal effect (EC50 biocides doses of 10–60 ppm). Due to these properties, the new gel-forming materials, in small doses of 0.1–0.3% increased the water retention and dispersity of sandy substrates to the level of loams, reduced the saturated hydraulic conductivity 20–140 times, suppressed the evaporation 2–4 times, and formed a windproof soil crust (strength up to 100 kPa). These new methodological developments and recommendations are useful for the complex laboratory testing of hydrogels in small (5–10 g) soil samples.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Gel-Forming Soil Conditioners of Combined Action: Laboratory Tests for Functionality and Stability

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Gel-forming composite conditioners are actively used in modern agronomy and landscaping to optimize water retention, water conductivity, aggregation, and ion-exchange capacity of soils and their erosion resistance, as well as to fix agrochemicals and plant-protection products in the rhizosphere [ 1 , 2 , 3 , 4 , 5 , 6 , 7 ]. Hydrogel’s working doses (0.05–0.5% by weight) are ten or even a hundred times lower in comparison with traditional ameliorants used in amounts of 1–10% and more [ 8 , 9 , 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

“…These doses effectively increase the water retention of soils by 3–5 times, increase the storage of productive water in topsoil by 1.5–2 times, and reduce water evaporation by 1.3–3 times and unproductive infiltration losses by 3–10 times [ 4 , 8 , 11 , 12 , 13 , 14 ]. The same and even smaller doses of gel-forming polymeric materials strongly aggregate the soil particles and protect them from wind erosion [ 7 , 12 , 13 ]. For finely dispersed soils, a small additive (10 mg/L) of water-soluble anionic polyacrylamide in irrigation water significantly affects infiltration and water absorption from irrigation furrows, structuring and protecting the soil from water erosion [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Gel-Forming Soil Conditioners of Combined Action: Field Trials in Agriculture and Urban Landscaping

et al. 2022

View full text Add to dashboard Cite

The article summarizes multivariate field trials of gel-forming soil conditioners for agriculture and urban landscaping in various climatic conditions from arid (O.A.E., Uzbekistan) to humid (Moscow region, Russia). The field test program included environmental monitoring of weather data, temperature, water–air regimes, salinity, alkalinity, and biological activity of various soils (sandy and loamy sandy Arenosols, Retisols, loamy Serozems), productivity and yield of plants (lawns, vegetables) and their quality, including pathogen infestation. The evolutionary line of polymer superabsorbents from radiation-crosslinked polyacrylamide (1995) to the patented “Aquapastus” material (2014–2020) with amphiphilic fillers and biocidal additives demonstrated not only success, but also the main problems of using hydrogels in soils (biodegradation, osmotic collapse, etc.), as well as their technological solutions. Along with innovative materials, our know-how consisted in the intelligent soil design of capillary barriers for water accumulation and antipathogenic and antielectrolyte protection of the rhizosphere. Gel-forming polymer conditioners and new technologies of their application increase the productivity of plant crops and the quality of biomass by 30–50%, with a 1.3–2-fold saving of water resources and reliable protection of the topsoil from pathogens and secondary salinization. The results can be useful to a wide range of specialists from chemical technologists to agronomists and landscapers.

show abstract