Water- and Fertilizer-Integrated Hydrogel Derived from the Polymerization of Acrylic Acid and Urea as a Slow-Release N Fertilizer and Water Retention in Agriculture

Journal of Agricultural and Food Chemistry
Dongdong ChengAiping Zhang

Abstract

To reduce the preparation cost of superabsorbent and improve the N release rate at the same time, a novel low-cost superabsorbent (SA) with the function of N slow release was prepared by chemical synthesis with neutralized acrylic acid (AA), urea, potassium persulfate (KPS), and N, N'-methylenebis(acrylamide) (MBA). The order of influence factors on the water absorbency property was determined by an orthogonal L18(3)7 experiment. On the basis of the optimization results of the orthogonal experiment, the effects of a single factor on the water absorption were investigated, and the highest water absorbency (909 g/g) was achieved for the conditions of 1.0 mol urea/mol AA ratio, 100% of AA neutralized, K+, 1.5% KPS to AA mass fraction, 0.02% MBA to AA mass fraction, 45 °C reaction temperature, and 4.0 h reaction time. The optimal sample was characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). Swelling behaviors of the superabsorbent were investigated in distilled water and various soil and salt solutions. The water-release kinetics of SA in different negative pressures and soils were systematically investigated. Additionally, the maize seed germination in various types of soil with...Continue Reading

References

Jul 26, 2002·Journal of Agricultural and Food Chemistry·Maria Tomaszewska, Anna Jarosiewicz
Feb 16, 2006·Journal of Agricultural and Food Chemistry·Rui Liang, Mingzhu Liu
Jun 22, 2006·Journal of Agricultural and Food Chemistry·Amit Kumar BansiwalSukumar Devotta
Nov 10, 2010·Journal of Agricultural and Food Chemistry·Boli NiYanfang Wang
Jan 27, 2015·Journal of Experimental Botany·Neil E Robbins, José R Dinneny

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Citations

Jul 10, 2019·Chemistry, an Asian Journal·Fengchi WuYumeng Shi
May 4, 2021·Chemical Reviews·Santiago CorreaEric A Appel
Aug 30, 2018·Journal of Agricultural and Food Chemistry·Lihong ZhangZhengyan Wu
Jun 30, 2019·Journal of Agricultural and Food Chemistry·Jinhui YangHongyuan Wang
Dec 11, 2021·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Faisal KhanShahab A A Nami

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