4.7 Article

Hydrogel-biochar composite for agricultural applications and controlled release fertilizer: A step towards pollution free environment

期刊

ENERGY
卷 242, 期 -, 页码 -

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.energy.2021.122977

关键词

Hydrogel; Biochar; Controlled release fertilizer; Swelling; Water retention; Pollution

资金

  1. ICAR Research Complex for NEH Region, Umiam, Meghalaya, India
  2. Department of Soil Science and Agricultural Chemistry, Palli Siksha Bhavana, Visva Bharati, Shantiniketan, India

向作者/读者索取更多资源

The study developed a hydrogel-biochar composite that can improve water retention capacity, decrease bulk density, and exhibit good N-P-K nutrient release performance. The composite has potential applications in soil conditioning, controlled release fertilizer carrier, and water preservation in drought-prone areas for a sustainable and pollution-free environment.
With the aim to develop superabsorbent and moisture retaining hydrogel-biochar composite for agricultural applications and as a controlled released fertilizer it was synthesized through graft-polymerization onto pine resin backbone. The biochar produced at 600 degrees C and morphomineralogically characterized. The N-P-K nutrient impregnated biochar was polymerized with hydrogels. The cross-linking of the composite was characterized by scanning electron microscope, transmission electron microscope, FT-IR, thermogravimetric analysis and water absorption capacity. The developed composite was able to increase water retention capacity (57.20-67.61%), porosity (6.25-21.05%); and decrease bulk density (5.26-9.02%) significantly. The degree of swelling varied 37-86 mL/g (swelling index) times of its own weight due to existence of numerous hydrophilic functional groups. The swelling index was more at pH 9.2 followed by 7.00 and lowest at 4.01. In the composite the N-P-K ratio was significant and rate of release of N-P-K in water and soil decreased with increasing acrylamide, monomer and cross-linker. After 288 h of incubation the N-P-K nutrient release from hydrogel-biochar composite varied 36.49-81.37%. Similarly, it exhibited 35.46-90.83% release of N-P-K in soil after 45 days study. The release kinetics fitted by Korsmeyer-Peppas model illustrates that the n values were 0.5 -1.0 (anomalous transport). After 180 days in buried study the weight loss was 59.4-72.9% and validated to be biodegradable with 138.6-162.4 days half-life. Such powerful and multifunctional hydrogelbiochar composite might be a gifted substance as soil conditioners, controlled release fertilizer carrier and water preserving mediator (drought-prone areas) for sustainable green and pollution free environment. (C) 2021 Elsevier Ltd. All rights reserved.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据