Lignin-based Hydrogel for Water Retention in Silt Loam Soil

Adjuik, Toby A.; Nokes, Sue E.; Montross, Michael D.; Wendroth, Ole

doi:10.13031/aim.202100216

Cited by 3 publications

(3 citation statements)

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“…This hydrogel is a promising material to improve water retention of soil in drought conditions. 70 Table 6 describes some of the important hydrogels based on lignin, their synthetic method, swelling behavior, and agricultural applications.…”

Section: Lignin Based Hydrogelsmentioning

confidence: 99%

Significance of biopolymer-based hydrogels and their applications in agriculture: a review in perspective of synthesis and their degree of swelling for water holding

Tariq,

Iqbal,

Rizwan

et al. 2023

RSC Adv.

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Section: Lignin Based Hydrogelsmentioning

confidence: 99%

Significance of biopolymer-based hydrogels and their applications in agriculture: a review in perspective of synthesis and their degree of swelling for water holding

Tariq,

Iqbal,

Rizwan

et al. 2023

RSC Adv.

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“…The repelling force facilitates the WAP's ability to absorb water molecules (Feng. et al, 2014;Adjuik et al, 2021). WAC reduces when fertilizers (salt and contaminants) are present in the WAP-treated solution (Namazi et al, 2019;Rattan et al, 2022).…”

Section: Impact Of Fertilizer On the Water-absorbing Capacity Of Wapmentioning

confidence: 99%

“…On the other hand, organic fertilizers are produced from waste products that contain impurities (Schweitzer et al, 2018). Previous research has mostly focused on different soil textures in WAP treated soil to investigate water retention properties (Adjuik et al, 2021;Narjary et al, 2012). Few studies have been conducted to investigate the change in water absorbing capacity of WAP when the water contains dissolved fertilizer salts.…”

Section: Introductionmentioning

confidence: 99%

Developing an environmental friendly approach for enhancing water retention with the amendment of water-absorbing polymer and fertilizers

Rattan¹,

Garg²,

Sekharan³

et al. 2023

CAJWR

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The effect of climate/environmental change has resulted in adverse water stress conditions which necessitates the sustainable approaches for improving the water use efficiency to boost agricultural production in Central Asia. Water-absorbing polymer (WAP) has emerged as one of the amendments for soil water stress management. WAP are chemically cross-linked structure capable of absorbing and storing a large amount of water. The agricultural land has different levels of fertilizers which can influence the performance of WAP because of its sensitivity due to external ionic medium. Therefore, the combined or hybrid use of WAP and organic/ inorganic fertilizers may inhibit the functionality of WAP, which needs to be thoroughly investigated. This study demonstrates the performance of two different WAPs (a commercially WAP (crosslinked potassium polyacrylate) and a laboratory synthesized WAP (crosslinked fly ash-polyacrylate superabsorbent composite)) with varying combinations of fertilizers in silt loam (agrarian soil). The combined use of fertilizers and WAP have improved the water retention properties of soils due to modification in the soil pore volume for both the WAPs. Quantification from water retention properties revealed a significant increase in plant wilting time (PWT) and plant available water content (PAWC) under the combined influence of fertilizers and WAP amended soils, indicating the possibility of high-water availability to plant roots. The study suggests the potential of WAPs as an efficient soil conditioner even in the presence of fertilizer for countering the negative impacts of water stress conditions. WAPs might minimize the requirement for chemical fertilizers, which helps to enhance the climate/environmental change and agriculture sector in the Central Asian region.

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Laboratory Determination of the Impact of Incorporated Alkali Lignin-Based Hydrogel on Soil Hydraulic Conductivity

Adjuik

Nokes

Montross

et al. 2022

Water

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Superabsorbent polymers (hydrogels) have been studied for their ability to influence soil hydraulic conductivity because they can store and release water due to their swelling properties. However, concerns related to the increased use of synthetic hydrogels necessitates a switch to bio-based hydrogels, which are renewable and more biodegradable in comparison to synthetic hydrogels. In this study, we synthesized a lignin-based hydrogel and amended a silt loam soil with it at concentrations of 0, 0.1, and 0.3% (w/w). A laboratory permeameter, double membrane tension infiltrometer, and evaporation method were used to measure the saturated (Ks), near saturated, and unsaturated hydraulic conductivity (K) of the samples, respectively. Saturated hydraulic conductivity was significantly decreased by the application of hydrogel at 0.1 and 0.3% (w/w) in comparison to the control treatment. The application of 0.3% (w/w) lignin-based hydrogel only significantly decreased hydraulic conductivity at −1 cm soil water pressure head. Hydraulic conductivity in the 0.1 and 0.3% (w/w) treatments increased along the K(θ) curve in the unsaturated zone (−750 cm < h < −10 cm) in comparison to the control treatment, which we hypothesized was due to bound water in the hydrogel being released and creating a wider path for the movement of water. The 0.1 and 0.3% hydrogel treatments also tended to store more water than the control treatment, especially after 24 h of evaporation. The implication of this study is that lignin-based hydrogels could swell and retain water in saturated soils and the bound water could be released to enhance the flow of soil water in unsaturated soil, thereby reducing the water stress of plants, which require less energy to move and absorb water.

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Lignin-based Hydrogel for Water Retention in Silt Loam Soil

Cited by 3 publications

References 0 publications

Significance of biopolymer-based hydrogels and their applications in agriculture: a review in perspective of synthesis and their degree of swelling for water holding

Significance of biopolymer-based hydrogels and their applications in agriculture: a review in perspective of synthesis and their degree of swelling for water holding

Developing an environmental friendly approach for enhancing water retention with the amendment of water-absorbing polymer and fertilizers

Laboratory Determination of the Impact of Incorporated Alkali Lignin-Based Hydrogel on Soil Hydraulic Conductivity

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