Improvement in the Water Retention Characteristics of Sandy Loam Soil Using a Newly Synthesized Poly(acrylamide-co-acrylic Acid)/AlZnFe2O4 Superabsorbent Hydrogel Nanocomposite Material

Shahid, Shaukat Ali; Qidwai, A.A.; Anwar, Farooq; Ullah, Inam; Rashid, Umer

doi:10.3390/molecules17089397

Cited by 105 publications

(84 citation statements)

References 21 publications

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“…It is believed that combining these practices would increase the levels of soil carbon (principally derived from the retained crop residues), and to improve water retention properties of the soil. Besides, water-retention additives like hydrophilic polymers (hydrogel) and silicate granules have been applied to soils to increase water holding capacity (WHC) and to improve plant available water (PAW) in substrates (Farrell et al, 2013;Shahid et al, 2012). Hydrophilic polymers are super absorbents that absorb and store water up to 500 times their own weight when saturated (Johnson, 1984), whereas the silicate-based granules contain natural silicate based stone powders (SiO 2 ), carbon compounds and cellulose that attach to the surface of soil particles and thereby increase the available surface area for nutrient and water sorption (Sanoway Australia, 2006).…”

Section: Introductionmentioning

confidence: 99%

Comparing the potentials of clay and biochar in improving water retention and mechanical resilience of sandy soil

Ajayi¹,

Horn²

2016

International Agrophysics

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A b s t r a c t. Changing climate is threatening rainfall regularity particularly in the semi-arid and arid regions; therefore, strategies to conserve water within their coarse-grained soils and to improve water use efficiency of crops are critical. This study compared the effectiveness of biochar and two types of clay materials in augmenting water retention and improving mechanical resilience of fine sand. The amendment of fine sand with woodchip-biochar and kaolinite (non-swelling clay) and Na-bentonite (swelling clay) improved the water retention capacity and interparticle bonding of the substrate depending of the rate of amendment and water content of the substrates. Na-bentonite was more effective at increasing water retention capacity at more negative matric potentials. Biochar was more effective at saturation due to the increased porosity, while kaolinite responds similarly to biochar. It is, however, shown that most of the water retained by the Na-betonite may not be available to plants, particularly at high amendment rate. Furthermore, the clay and biochar materials improved particle bonding in the fine sand with the Na-bentonite being more effective than biochar and kaolinite (in that order) in strengthening interparticle bonds and improving the resilience of fine sand, if the rate of amendment is kept at ≤50 g kg -1 .

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Section: Introductionmentioning

confidence: 99%

Comparing the potentials of clay and biochar in improving water retention and mechanical resilience of sandy soil

Ajayi¹,

Horn²

2016

International Agrophysics

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“…The presence of SAP in the sandy soil drastically altered the height of the plants than of the not amended control with increments of 30, 127 and 399%, respectively, with 0.5, 1 and 2% of hydrogel in the case of bean (Phaseolus vulgaris L.), while for the pumpkin (C. pepo) the increases were 16, 59 and 178%, corresponding to 0.5, 1 and 2% of hydrogel in soil. The enhancement in soil moisture retention and improvement in seed germination and seedling growth as a result of superabsorbent hydrogel amendments has been reported previously [39,42]. The quantity of this increment depends on the quantity of hydrophilic polymer used [41].…”

Section: Seed Germination and Seedling Growthmentioning

confidence: 74%

“…When soil is treated with SAP, its water retention properties are related to both porosity and the SAP's water absorbency. These results suggested that the adding of hydrogels into soil could obviously improve the water-retention capacity of soil and lessen the amount of water evaporation [35,38,39]. The trends of the curves suggest that the SAP improved the water retention properties of the treated soil during the early period.…”

Section: Water Retention Behavior In Soil-superabsorbent Polymermentioning

confidence: 86%

Valorization of Superabsorbent Polymers from Used Disposable Diapers as Soil Moisture Conditioner

Orozco¹,

Timoteo-Cruz²,

Torres-Blancas³

et al. 2017

Preprint

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This study was conducted to explore the potential of superabsorbent polymers (SAPs) from used disposable diapers as soil moisture conditioner. Swelling behavior of the proposed hydrogel in response to external stimuli such as salt solutions, temperature and pH was studied. In addition, laboratory experiments were carried out to evaluate the effects of incorporation hydrogel on germination of bean (Phaseolus vulgaris L.) and pumpkin (C. pepo) seeds. The structure of the superabsorbent was characterized by Fourier transform infrared spectroscopy (FTIR). The results indicate that the proposed SAP exhibited a maximum swelling capacity of 189 g⋅g -1 of dry gel. It was observed that the swelling capacity decreased with an increase in the ionic strength of the swelling medium. When this SAP was mixed with sandy soil, the mixture was able to lose water more slowly. The seeds germination and seedling growth was remarkably influenced by the application of 0.5, 1.0 and 2.0 w/w% of SAP compared to the untreated soil. Therefore, it follows that it is possible to take advantage of SAPs property from used disposable diapers to retain the moisture in soil as an alternative to value the use of such waste, showing that it has potential for diverse applications in agriculture.

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“…it is known that ur u = cs, r cs (35) assuming that in a porous media, the speed of sound in real physical unit cs, r = 200 m/s, the density of water in the real physical unit ρr = 1000 kg/m 3 ; the speed of sound in lattice unit cs = 1/ √ 3, the density of water in lattice unit ρ = 1 it can be calculated that 11.97 × 10 7 ∇T = 0.113∇T (37) Note that Eq. 37 needs to be corrected according to the type of porous media.…”

Section: Implementation Of Water Potentialmentioning

confidence: 99%

“…In our previous research, 200×500 lattices provide sufficient representativeness of the characteristics of soil. The porosity of sandy loam soil varies between 0.4 and 0.5 [37]. It is assumed that the porosity of soil in the experiment is 0.45.…”

Section: Soil Model and Parameters For Numerical Simulation 321 Soimentioning

confidence: 99%

Macroscopic lattice Boltzmann model for heat and moisture transfer process with phase transformation in unsaturated porous media during freezing process

Song

Zhang

et al. 2017

Open Physics

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In the current study, a macroscopic lattice Boltzmann model for simulating the heat and moisture transport phenomenon in unsaturated porous media during the freezing process was proposed. The proposed model adopted percolation threshold to reproduce the extra resistance in frozen fringe during the freezing process. The freezing process in Kanagawa sandy loam soil was demonstrated by the proposed model. The numerical result showed good agreement with the experimental result. The proposed model also offered higher computational efficiency and better agreement with the experimental result than the existing numerical models. Lattice Boltzmann method is suitable for simulating complex heat and mass transfer process in porous media at macroscopic scale under proper dimensionless criterion, which makes it a potentially powerful tool for engineering application.

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Improvement in the Water Retention Characteristics of Sandy Loam Soil Using a Newly Synthesized Poly(acrylamide-co-acrylic Acid)/AlZnFe2O4 Superabsorbent Hydrogel Nanocomposite Material

Cited by 105 publications

References 21 publications

Comparing the potentials of clay and biochar in improving water retention and mechanical resilience of sandy soil

Comparing the potentials of clay and biochar in improving water retention and mechanical resilience of sandy soil

Valorization of Superabsorbent Polymers from Used Disposable Diapers as Soil Moisture Conditioner

Macroscopic lattice Boltzmann model for heat and moisture transfer process with phase transformation in unsaturated porous media during freezing process

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