Facile construction of amphoteric lignin-based hydrogel to simultaneously capture ammonium and phosphate ions and reutilization as bio-based slow-release fertilizer

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2024-11-19 DOI:10.1016/j.colsurfa.2024.135800

Yihao Zhang , Yingnan Sun , Haiming Li , Meihong Niu , Xing Wang , Zhiwei Wang , Yanzhu Guo

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引用次数: 0

Abstract

Herein, a type of amphoteric lignin-based hydrogel adsorbent (ALH) was synthesized via free radical polymerization of lignosulfonate with methylacrylloxyethyl trimethyl ammonium chloride and acrylic acid through a simple one-pot approach. The ALH exhibited excellent adsorption capacity in removing ammonium (NH₄⁺) and phosphate (H₂PO₄^-) ions, with a maximum theoretical adsorption capacity (q_e) of 200.49 and 257.22 mg·g⁻¹, respectively. Meanwhile, the effects of ALH dosage, pH values of solution, and interfering ionic ions on the q_e of ALH were also investigated. The adsorption process of ALH for ammonium and phosphate ions obeyed the pseudo-first-order kinetic and Freundlich isotherm model. The possible mechanism of the adsorption processes were the physical and chemical adsorption. The reusability results indicated that ALH exhibited outstanding recyclability and stability, and the adsorption capacity was maintained more than 91.04 % and 91.00 % after five cycles of regeneration. The ALH prepared in this manuscript exhibited relatively higher adsorption capacity to ammonium and phosphate ions than the majority of non-metallic adsorbents. The adsorbed ALH could be reused as a slow-release fertilizer for the culture of rice hydroponics. In addition, the recycled ALH displayed excellent slow-release capacities and 71.5 % of ammonium and phosphate ions were released from ALH-N&P within 30 days. The products in this manuscript would not only open ways on the high-value application of lignin and recirculation of the adsorbent, but also give highlights on developing cost-effective and eco-friendly slow-release fertilizers in agriculture or substrates for oilless culture.

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轻松构建两性木质素基水凝胶，同时捕获铵和磷离子，并作为生物基缓释肥料再利用

本文采用简单的一锅法，通过木质素磺酸盐与甲基丙烯酰氧乙基三甲基氯化铵和丙烯酸的自由基聚合，合成了一种两性木质素基水凝胶吸附剂（ALH）。ALH在去除铵（NH4+）和磷酸盐（H2PO4-）离子方面表现出优异的吸附能力，其最大理论吸附容量（qe）分别为200.49 mg-g-1和257.22 mg-g-1。同时，还考察了 ALH 的用量、溶液 pH 值和干扰离子对 ALH qe 的影响。ALH对铵离子和磷酸根离子的吸附过程符合伪一阶动力学和Freundlich等温线模型。吸附过程的可能机理是物理吸附和化学吸附。可重复使用性结果表明，ALH 具有出色的可回收性和稳定性，经过五次再生后，吸附容量分别保持在 91.04% 和 91.00% 以上。与大多数非金属吸附剂相比，本文制备的 ALH 对铵离子和磷酸盐离子的吸附能力相对较高。吸附后的 ALH 可作为缓释肥料重新用于水稻栽培。此外，回收的 ALH 还具有出色的缓释能力，在 30 天内，71.5% 的铵和磷离子从 ALH-N&P 中释放出来。本手稿中的产品不仅为木质素的高值化应用和吸附剂的再循环开辟了道路，还为开发经济、环保的农业缓释肥料或无土栽培基质提供了亮点。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Colloids and Surfaces A: Physicochemical and Engineering Aspects 化学-物理化学

CiteScore

8.70

自引率

9.60%

发文量

2421

审稿时长

56 days

期刊介绍： Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications of colloids and interfacial phenomena. The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.