Synthesis of microwave-mediated biochar-hydrogel composites for enhanced water absorbency and nitrogen release

Superabsorbent hydrogels have been used to enhance water and nutrient retention in agricultural soils. However, wide applications of these polymeric soil amendments on large farms are plagued by their high costs and environmental footprints. Therefore, solutions are urgently needed in order to optim...

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Autores principales:	Yudi Wu, Colten Brickler, Simeng Li, Gang Chen
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Biochar Microwave irradiation Nitrogen release Soil amendment Superabsorbent hydrogel Water absorbency Polymers and polymer manufacture TP1080-1185
Acceso en línea:	https://doaj.org/article/2af41c08bb7b44a2bca8e493f94af0ef
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spelling	oai:doaj.org-article:2af41c08bb7b44a2bca8e493f94af0ef2021-11-24T04:25:56ZSynthesis of microwave-mediated biochar-hydrogel composites for enhanced water absorbency and nitrogen release0142-941810.1016/j.polymertesting.2020.106996https://doaj.org/article/2af41c08bb7b44a2bca8e493f94af0ef2021-01-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S014294182032225Xhttps://doaj.org/toc/0142-9418Superabsorbent hydrogels have been used to enhance water and nutrient retention in agricultural soils. However, wide applications of these polymeric soil amendments on large farms are plagued by their high costs and environmental footprints. Therefore, solutions are urgently needed in order to optimize the hydrogel application. Biochar, which is a cost-effective pyrolysis product, has been applied as soil amendments for soil fertility reservation. In this study, biochar was co-polymerized with hydrogels to explore the agronomic potentials. Biochar-hydrogel composites were synthesized through rapid mediation of microwave radiation. The physicochemical properties of these composites, such as surface functionality, thermal stability, and morphology, were characterized using various state-of-the-art analytical techniques. The discoveries in this study demonstrated that microwave irradiation could effectively facilitate structural alteration and optimize cross-linkage of biochar-hydrogel composites. Biochar-hydrogel composite (7.5% w/w biochar/composite) significantly improved swelling capacity (20.18% water was absorbed after 48 h) and optimized the nitrogen release (20.03% of nitrogen was release after 30 days) of composites. Water adsorption and nitrogen release obeyed Gallagher-Corrigan model and Korsmeyer-Peppas model, respectively. The results revealed the microwave-irradiated biochar-hydrogel composite is a promising soil amendment with regard to economic benefit and environmental footprint.Yudi WuColten BricklerSimeng LiGang ChenElsevierarticleBiocharMicrowave irradiationNitrogen releaseSoil amendmentSuperabsorbent hydrogelWater absorbencyPolymers and polymer manufactureTP1080-1185ENPolymer Testing, Vol 93, Iss , Pp 106996- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Biochar Microwave irradiation Nitrogen release Soil amendment Superabsorbent hydrogel Water absorbency Polymers and polymer manufacture TP1080-1185
spellingShingle	Biochar Microwave irradiation Nitrogen release Soil amendment Superabsorbent hydrogel Water absorbency Polymers and polymer manufacture TP1080-1185 Yudi Wu Colten Brickler Simeng Li Gang Chen Synthesis of microwave-mediated biochar-hydrogel composites for enhanced water absorbency and nitrogen release
description	Superabsorbent hydrogels have been used to enhance water and nutrient retention in agricultural soils. However, wide applications of these polymeric soil amendments on large farms are plagued by their high costs and environmental footprints. Therefore, solutions are urgently needed in order to optimize the hydrogel application. Biochar, which is a cost-effective pyrolysis product, has been applied as soil amendments for soil fertility reservation. In this study, biochar was co-polymerized with hydrogels to explore the agronomic potentials. Biochar-hydrogel composites were synthesized through rapid mediation of microwave radiation. The physicochemical properties of these composites, such as surface functionality, thermal stability, and morphology, were characterized using various state-of-the-art analytical techniques. The discoveries in this study demonstrated that microwave irradiation could effectively facilitate structural alteration and optimize cross-linkage of biochar-hydrogel composites. Biochar-hydrogel composite (7.5% w/w biochar/composite) significantly improved swelling capacity (20.18% water was absorbed after 48 h) and optimized the nitrogen release (20.03% of nitrogen was release after 30 days) of composites. Water adsorption and nitrogen release obeyed Gallagher-Corrigan model and Korsmeyer-Peppas model, respectively. The results revealed the microwave-irradiated biochar-hydrogel composite is a promising soil amendment with regard to economic benefit and environmental footprint.
format	article
author	Yudi Wu Colten Brickler Simeng Li Gang Chen
author_facet	Yudi Wu Colten Brickler Simeng Li Gang Chen
author_sort	Yudi Wu
title	Synthesis of microwave-mediated biochar-hydrogel composites for enhanced water absorbency and nitrogen release
title_short	Synthesis of microwave-mediated biochar-hydrogel composites for enhanced water absorbency and nitrogen release
title_full	Synthesis of microwave-mediated biochar-hydrogel composites for enhanced water absorbency and nitrogen release
title_fullStr	Synthesis of microwave-mediated biochar-hydrogel composites for enhanced water absorbency and nitrogen release
title_full_unstemmed	Synthesis of microwave-mediated biochar-hydrogel composites for enhanced water absorbency and nitrogen release
title_sort	synthesis of microwave-mediated biochar-hydrogel composites for enhanced water absorbency and nitrogen release
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/2af41c08bb7b44a2bca8e493f94af0ef
work_keys_str_mv	AT yudiwu synthesisofmicrowavemediatedbiocharhydrogelcompositesforenhancedwaterabsorbencyandnitrogenrelease AT coltenbrickler synthesisofmicrowavemediatedbiocharhydrogelcompositesforenhancedwaterabsorbencyandnitrogenrelease AT simengli synthesisofmicrowavemediatedbiocharhydrogelcompositesforenhancedwaterabsorbencyandnitrogenrelease AT gangchen synthesisofmicrowavemediatedbiocharhydrogelcompositesforenhancedwaterabsorbencyandnitrogenrelease
_version_	1718415965808492544

Synthesis of microwave-mediated biochar-hydrogel composites for enhanced water absorbency and nitrogen release

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