Volume 136, Issue 15 47332
Article

Zeolite reinforced carboxymethyl cellulose-Na+-g-cl-poly(AAm) hydrogel composites with pH responsive phosphate release behavior

Anupama Singh

Corresponding Author

Anupama Singh

Division of Agricultural Chemicals, ICAR-Indian Agricultural Research Institute, New Delhi, India

Correspondence to: A. Singh (E-mail: [email protected])Search for more papers by this author
Dhruba Jyoti Sarkar

Dhruba Jyoti Sarkar

Division of Agricultural Chemicals, ICAR-Indian Agricultural Research Institute, New Delhi, India

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Shailja Mittal

Shailja Mittal

Division of Agricultural Chemicals, ICAR-Indian Agricultural Research Institute, New Delhi, India

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Rashmi Dhaka

Rashmi Dhaka

Division of Agricultural Chemicals, ICAR-Indian Agricultural Research Institute, New Delhi, India

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Pushkar Maiti

Pushkar Maiti

Division of Agricultural Chemicals, ICAR-Indian Agricultural Research Institute, New Delhi, India

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Aarushi Singh

Aarushi Singh

Division of Agricultural Chemicals, ICAR-Indian Agricultural Research Institute, New Delhi, India

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Taruna Raghav

Taruna Raghav

Division of Agricultural Chemicals, ICAR-Indian Agricultural Research Institute, New Delhi, India

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Dilip Solanki

Dilip Solanki

Division of Soil Science and Agricultural Chemistry, ICAR-Indian Agricultural Research Institute, New Delhi, India

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Nayan Ahmed

Nayan Ahmed

Division of Soil Science and Agricultural Chemistry, ICAR-Indian Agricultural Research Institute, New Delhi, India

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Shashi Bala Singh

Shashi Bala Singh

Division of Agricultural Chemicals, ICAR-Indian Agricultural Research Institute, New Delhi, India

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First published: 20 December 2018
Citations: 20

ABSTRACT

Phosphate fixation in soils is a matter of concern in agriculture. Conventional application of phosphorus fertilizer suffers from low P use constraint, particularly in acidic soils. Rhizosphere centric slow release strategy bears tremendous prospects. In the present study, monocalcium phosphate (MCP) was impregnated in zeolite reinforced CMC-Na+-g-cl-Poly(Aam) hydrogel composites with aim to develop slow phosphate release device for soil application. X-ray diffraction, scanning electron microscopy, and Fourier transform-infrared spectroscopy confirmed the successful synthesis of slow release fertilizer formulations. Presence of zeolite in composite matrix during polymerization resulted in higher MCP loading. The “burst release” phenomena under neutral aqueous environment as compared to diffusion led slow release mechanism under acidic condition suggesting that phosphate release from developed composite matrix was pH responsive. The developed materials possess potential to serve as tool for improving phosphate use efficiency under resource stress agriculture. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47332.

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