Superabsorbent Hydrogel Composite with Minerals Aimed at Water Sustainability

Magalhães, Antônio Sávio G.; Neto, Manuel P. Almeida; Bezerra, Maslândia N.; Feitosa, Judith P.A.

doi:10.5935/0103-5053.20130039

Cited by 30 publications

(13 citation statements)

References 3 publications

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“…They also indicated that these SH are potential candidates to be applied as an alternative to combat of global climate change because they can improve the soil properties, mainly in conditions of reduced moisture availability. Other authors investigated the applicability of the polymers, common hydrogels and SH as strategies to improve the soil properties [184][185][186][187][188][189][190][191][192][193][194][195][196][197][198][199][200][201].…”

Section: Application As Soil Conditionersmentioning

confidence: 99%

Superabsorbent hydrogels based on polysaccharides for application in agriculture as soil conditioner and nutrient carrier: A review

Guilherme

Aouada

Fajardo

et al. 2015

European Polymer Journal

578

325

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a b s t r a c t Superabsorbent hydrogels (SH) continue being a very important issue in both academic and industrial fields due to their applications in several technologies. This is proved by the impressive number of publications, through papers and patents as well, dealing with SH. This review is targeted to update and discuss some important aspects of synthesis, characterization and application of SH in agriculture, mainly those based on polysaccharides, as soil conditioners and as polymer carriers for nutrient release. Basic properties of SH and some methods for chemically modifying polysaccharides are given and some directions for hydrogels preparation are highlighted as well. Mechanisms associated with water transport into the 3D matrix, taking into account the transference of mass from hydrogelsoil system to plant, are discussed in the light of some mathematical models. Release of nutrients either from granules coated by hydrophilic polymer or from SH, targeting applications in agriculture, is also discussed on the basis of often used mathematical models (the swelling-based kinetic models) and on a diffusion-based kinetic model with a partition activity coefficient. Examples of recent applications in agriculture as soil conditioners and carriers for nutrient release (fertilizers, etc.) are given. At the final, future trends and perspectives are considered. More than two hundreds references are cited in the whole text.

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Section: Application As Soil Conditionersmentioning

confidence: 99%

Superabsorbent hydrogels based on polysaccharides for application in agriculture as soil conditioner and nutrient carrier: A review

Guilherme

Aouada

Fajardo

et al. 2015

European Polymer Journal

578

325

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“…Studies confirm that hydrogels are useful and suitable for growing media, especially for sandy soils [49,51,53,54]. Nevertheless, in agriculture or dryland restoration, the usage of a mix of watering methods is proposed: water irrigation-mineral soil amendment-superabsorbent polymer [55][56][57][58]. Regarding the mixing method of superabsorbent polymers, it might have some disadvantages resulting from swelling behavior.…”

Section: Introductionmentioning

confidence: 99%

The Influence of a Water Absorbing Geocomposite on Soil Water Retention and Soil Matric Potential

Śpitalniak

Lejcuś

Dąbrowska

et al. 2019

Water

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Climate change induces droughts that are becoming more intensive and more frequent than ever before. Most of the available forecast tools predict a further significant increase in the risk of drought, which indicates the need to prepare solutions to mitigate its effects. Growing water scarcity is now one of the world’s leading challenges. In agriculture and environmental engineering, in order to increase soil water retention, soil additives are used. In this study, the influence of a newly developed water absorbing geocomposite (WAG) on soil water retention and soil matric potential was analyzed. WAG is a special element made from geotextile which is wrapped around a synthetic skeleton with a superabsorbent polymer placed inside. To describe WAG’s influence on soil water retention and soil matric potential, coarse sand, loamy sand, and sandy loam soils were used. WAG in the form of a mat was used in the study as a treatment. Three kinds of samples were prepared for every soil type. Control samples and samples with WAG treatment placed at depths of 10 cm and 20 cm were examined in a test container of 105 × 70 × 50 cm dimensions. The samples had been watered and drained, and afterwards, the soil surface was heated by lamps of 1100 W total power constantly for 72 h. Soil matric potential was measured by Irrometer field tensiometers at three depths. Soil moisture content was recorded at six depths: of 5, 9, 15, 19, 25, and 30 cm under the top of the soil surface with time-domain reflectometry (TDR) measurement devices. The values of soil moisture content and soil matric potential were collected in one-minute steps, and analyzed in 24-h-long time steps: 24, 48, and 72 h. The samples with the WAG treatment lost more water than the control samples. Similarly, lower soil matric potential was noted in the samples with the WAG than in the control samples. However, after taking into account the water retained in the WAG, it appeared that the samples with the WAG had more water easily available for plants than the control samples. It was found that the mechanism of a capillary barrier affected higher water loss from soil layers above those where the WAG had been placed. The obtained results of water loss depend on the soil type used in the profile.

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“…Los retenedores de agua, hidro-retenedores, hidrogeles ó polímeros superabsorbentes pueden ser definidos como materiales constituidos por redes poliméricas hidrofilias química y físicamente reticuladas, capaces de absorber o retener grandes cantidades de agua o fluidos biológicos sin perder su forma tridimensional (3D). Son fácilmente sintetizados por copolimerización de solución de acrilamida y acrilato con un agente reticulante (Brito et al, 2013;Magalhães et al, 2013). El copolímero de acrilamida y acrilato de potasio ó poliacrilato tienen la característica de ser altamente higroscópicos; es decir, absorben grandes cantidades de humedad (finalmente agua).…”

Section: Introductionunclassified

“…El polvo granulado de acrilato de potasio es biodegradable no tóxico que comercialmente se conoce como silos de agua, el cual es un compuesto de copolímeros reticulados de ácido acrílico y acrilamida con base en potasio no tóxico, ni contaminante para el suelo o plantas (Trujillo, 2009). Son utilizados en la actividad agrícola como acondicionadores de suelo, principalmente por aumentar la capacidad de almacenar agua en el suelo (Brito et al, 2013;Magalhães et al, 2013). Los suelos que reciben poca lluvia o irrigación o son demasiado porosos para retener la humedad en la zona de las raíces, se benefician notablemente con el uso de hidrogeles.…”

Section: Introductionunclassified

“…En Brasil, se han aplicado hidrogeles a los suelos en los que se cultivan café, frutas cítricas, legumbres y verduras. También se estudió el efecto de los hidrogeles en la siembra y producción de plantines de eucalipto (Lópes et al, 2010) y café, en la supervivencia de Pinus y Araucaria, y en la producción de caña de azúcar (Magalhães et al, 2013). Los hidrogeles se emplean también en campos deportivos y jardines para disminuir los costos de mantenimiento y conservar la frondosidad (Barón et al, 2007).…”

Section: Introductionunclassified

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Efecto de la aplicación de copolímeros sobre el cultivo de lechuga (Lactuca sativa L.)

Andrada

Gabriela

2018

rcia

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RESUMENLa problemática de la producción agrícola en las regiones áridas y semiáridas reside mayormente en la escasez de agua para riego y en la baja calidad de los suelos, por lo cual, es importante buscar alternativas y formas eficientes de manejo de los recursos hídricos en estas regiones en un marco de absoluta racionalidad y sustentabilidad. El objetivo de este trabajo fue evaluar la capacidad de retención hídrica del copolímero de acrilamida y acrilato de potasio, como mejorador de la implantación y crecimiento de un cultivo de lechuga (Lactuca sativa L.) bajo condiciones controladas. Se compararon dos tratamientos con dosis de 25 y 50 kg. ha -1 versus un testigo de control, con el fin de determinar si el uso de dicha enmienda mejoraba la producción del cultivo. Se evalúa con la emergencia, la supervivencia, el peso fresco y seco de la parte aérea del cultivo y el contenido de humedad del suelo. Las respuestas fueron positivas para la aplicación de la enmienda en la dosis menor dado que aumentó la emergencia de plántulas, supervivencia, crecimiento y en consecuencia su rendimiento, como así también el contenido de humedad del suelo. En conclusión, la aplicación de 25 kg. ha -1 del copolímero en el establecimiento del cultivo de lechuga, mejoró el crecimiento e incrementó su rendimiento.Palabras clave: acrilamida, acrilato de potasio, hidrogel, rendimiento. Volumen 34(1):27-35 ABSTRACTThe main problem of the agricultural production in arid and semiarid regions is mainly the scarcity of irrigation water and the low quality of the soils. Hence, it is important to find alternatives and efficient water resources management practices in these regions within a frame of absolute rationality and sustainability. The objective of this work was to assess the water retention capacity of acrilamyde copolymer and potassium acrylate and how these could improve a lettuce crop (Lactuca sativa L.) implantation and growth under controlled conditions. Two treatments with 25 and 50 kg. ha -1 doses versus a control sample were compared in order to determine if the use of said amendment could improve crop production. The emergence, survival, fresh and dry weight of the aerial part of the crop and the soil humidity levels were evaluated. The answers were positive for the application of the amendment in the lower dose since the emergence of seedlings, its survival, its growth and its consequent yield raised, as well as the moisture content of the soil. In conclusion, the application of 25 kg ha -1 of the copolymer in the of the lettuce crop site, improved the growth and increased its yield.

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Superabsorbent Hydrogel Composite with Minerals Aimed at Water Sustainability

Cited by 30 publications

References 3 publications

Superabsorbent hydrogels based on polysaccharides for application in agriculture as soil conditioner and nutrient carrier: A review

Superabsorbent hydrogels based on polysaccharides for application in agriculture as soil conditioner and nutrient carrier: A review

The Influence of a Water Absorbing Geocomposite on Soil Water Retention and Soil Matric Potential

Efecto de la aplicación de copolímeros sobre el cultivo de lechuga (Lactuca sativa L.)

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