Quantifying the combined effect of pH and salinity on the performance of water absorbing polymers used for drought management

Saha, Abhisekh; Rattan, Bharat; Sreedeep, S.; Manna, Uttam

doi:10.1007/s10965-021-02795-5

Cited by 9 publications

(3 citation statements)

References 39 publications

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“…Upon entering the soil, SAPs have been shown to gradually lose their intended properties despite their designated durability (Buchmann et al, 2015;Buchmann and Schaumann, 2017;Almeida and Klemm, 2018;Jung et al, 2020;Saha et al, 2021). Prolonged weathering and elevated residence times may trigger the formation of (micro)plastic-like solid SAP residues, as indicated by Bai et al (2013), Dehkordi (2016) and Kumar et al (2018).…”

Section: Introductionmentioning

confidence: 99%

Superabsorbent polymers in soil: The new microplastics?

Buchmann,

Neff,

Meyer

et al. 2024

Camb. prisms Plast.

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The extensive use of synthetic polymers in our everyday lives has resulted in significant plastic pollution. Superabsorbent polymers (SAPs) are yet another class of anthropogenic materials with uncertain environmental implications. SAPs, like polyacrylates (PAA) or polyacrylamides (PAM), find applications in personal care products, construction, wastewater treatment, agriculture and soil remediation. However, when SAPs enter the soil, weathering may change their intended properties, potentially forming plastic-like solid residues over time. This review aims to evaluate the current scientific understanding of the application and environmental fate of SAPs in soil, focusing on the processes driving their potential transformation into solid residues. We explore analytical techniques for the qualitative and quantitative characterization of SAPs and solid SAP residues. Our research provides first insights into the potential mechanisms and conditions governing SAP aging and transformation, advancing our understanding of the fate of SAPs in soil and their impact on soil properties and functioning. There are specific knowledge gaps regarding the influence of climate change on the application and transformation of SAPs in soil. To facilitate future research, we suggest scrutinizing relevant processes of SAP transformation in the field, critically (re)evaluating SAP application to the soil and establishing robust monitoring methods.

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Section: Introductionmentioning

confidence: 99%

Superabsorbent polymers in soil: The new microplastics?

Buchmann,

Neff,

Meyer

et al. 2024

Camb. prisms Plast.

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“…Ions diminish available water in the WAP network through enhanced crosslink density, resulting in reduction of performance of WAP (Zhang et al, 2014). Mahdavinia et al 2004 andSaha et al, 2021a reported that pH influences WAP performance, in acidic medium having a greater impact than basic medium. Furthermore, Al-Jabri et al (2014) reported that water quality influences WAP swelling behaviour.…”

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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“…The water retention behavior of the soil can be quantified in terms of soil–water characteristic curve (SWCC), which represents the relationship between soil water potential, also known as soil suction or matric suction (ψ), and soil water content (Lu and Khorshidi, 2015). Measurement of soil ψ and volumetric water content is an effective way to identify the possibility of continued water stress condition in soils resulting in temporary or permanent damage of plants crop growth and yield (Han et al., 2013; Saha, Rattan, et al., 2021). During drought, plant parameters such as plant height, biomass, number of leaves (or leaf area index), stomatal conductance (SC), net photosynthesis, chlorophyll, and yield are affected (Sakya et al., 2021; Garg et al., 2020; Kišš and Šurda, 2021).…”

Section: Introductionmentioning

confidence: 99%

Efficacy of novel water‐absorbing polymer amended soil for improving drought resilience of Solanum lycopersicum

Rattan

Saha

Bordoloi

et al. 2022

Soil Science Soc of Amer J

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Climate change has exacerbated the frequency and duration of droughts. To sustain food production in such conditions, water storage and retention capacity of soil must be enhanced. Development of water-absorbing polymer (WAP) from coal carbon residue (fly ash) can provide an economical and environmentally friendly alternative to commercial WAP for enhancing water retention and crop yield. The main objective of this study is to evaluate the growth performance of tomato species (Solanum lycopersicum L.) under continued drought conditions in the presence of in-house developed fly ash-based WAP (FA-WAP) against that of commercially available WAP (Com-WAP). Quantification of the soil-water retention curve (SWRC) revealed an increase in plant wilting time and plant-available water content (PAWC) in the order: control soil (no amendment) < Com-WAP-amended soil < FA-WAP-amended soil. Both the WAPs positively influenced the transpiration factors of crops in terms of stomatal conductance (SC) and photosynthetic yield under continued drought conditions. The yield parameters (i.e., the number of fruits, total weight, and shoot fresh biomass) increased by 82, 106, and 115%, respectively, in the case of FA-WAP-amended soil as compared with that of the control. Nevertheless, FA-WAP provided 20% higher yield of tomato species during continued drought conditions than commercial WAP. The application of FA-WAP can be an effective strategy to impart beneficial usage of FA waste by significantly reducing the irrigation

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Quantifying the combined effect of pH and salinity on the performance of water absorbing polymers used for drought management

Cited by 9 publications

References 39 publications

Superabsorbent polymers in soil: The new microplastics?

Superabsorbent polymers in soil: The new microplastics?

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

Efficacy of novel water‐absorbing polymer amended soil for improving drought resilience of Solanum lycopersicum

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