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IF 6.7 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation Pub Date : 2025-02-01 DOI:10.1016/j.eti.2024.103953

Yingqiang Zhang , Shuiqin Zhang , Ji Xue , Bingqiang Zhao , Yanting Li , Meng Xu , Jiukai Xu , Jianyuan Jing , Liang Yuan

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引用次数: 0

摘要

酚羟基（ArOH）在腐植酸（HA）提高氮肥效率方面发挥着重要作用。然而，腐植酸中 ArOH 的含量通常较低，而传统的富集改性方法效率不高，甚至存在潜在的毒性风险。在这项工作中，我们开发了一种富含中孔和氧空位的新型催化剂 CuO@Al2O3，并采用可行的机械催化方法对 HA 进行靶向改性，以提高其 ArOH 含量。结果表明，成功制备出富含酚的 HA（CuO@Al2O3-HA），其 ArOH 含量比 HA 高 40%，这与 XPS C1s 光谱中 C-O/Ar-O 含量增加 43.13% 相一致。与 RHA 相比，CuO@Al2O3-HA 的单宁含量更低，这归因于 CuO@Al2O3 催化 Ar-C 键断裂形成 ArOH。随后，我们制备了 CuO@Al2O3-HA 增强尿素（CuO@Al2O3-HAU），发现 CuO@Al2O3-HAU 通过提高叶片叶绿素含量（8.78 %）和抑制 NH3 挥发降低氮素损失（12.43 %），因此与 RHA 增强尿素（RHAU）相比，玉米幼苗的生物量和氮素吸收量分别提高了 11.29 % 和 21.22 %。因此，本研究提供了一种富集 HA 中 ArOH 含量的方法，为高效尿素产品的升级提供了一种绿色途径。

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Targeted fortification of phenolic hydroxyl groups in humic acid to further enhance urea use efficiency in maize seedling

Phenolic hydroxyl group (ArOH) plays an important role in humic acid (HA) enhancing nitrogen (N) fertilizer efficiency. However, the content of ArOH in HA is usually low, while its traditional enriching modification are inefficient or even showed a potential toxicity risk. In this work, we developed a novel catalyst named CuO@Al₂O₃ enriched with mesopores and oxygen vacancies, and target-modified HA to increase its ArOH using a feasible mechanical catalytic method. The results showed that phenolic-rich HA (CuO@Al₂O₃-HA) were successfully prepared with 40 % higher ArOH content than HA, which was consistent with the 43.13 % increase in C-O/Ar-O content in XPS C1s spectra. Compared to RHA, CuO@Al₂O₃-HA had less tannin attributed to the Ar-C bond breakage catalyzed by CuO@Al₂O₃ to form ArOH. Subsequently, we prepared CuO@Al₂O₃-HA-enhanced urea (CuO@Al₂O₃-HAU), and found that CuO@Al₂O₃-HAU improved maize seedling growth by the elevation of leaf chlorophyll content (by 8.78 %) and lowering N loss by NH₃ volatilization inhibition (by 12.43 %), thus enhanced the biomass and N uptake of maize seedling by 11.29 % and 21.22 %, respectively, compared to RHA-enhanced urea (RHAU). Therefore, this study provided a method to enrich the ArOH content of HA, and a green approach for the upgrading of high-efficiency urea products.

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来源期刊

Environmental Technology & Innovation Environmental Science-General Environmental Science

CiteScore

14.00

自引率

4.20%

发文量

435

审稿时长

74 days

期刊介绍： Environmental Technology & Innovation adopts a challenge-oriented approach to solutions by integrating natural sciences to promote a sustainable future. The journal aims to foster the creation and development of innovative products, technologies, and ideas that enhance the environment, with impacts across soil, air, water, and food in rural and urban areas. As a platform for disseminating scientific evidence for environmental protection and sustainable development, the journal emphasizes fundamental science, methodologies, tools, techniques, and policy considerations. It emphasizes the importance of science and technology in environmental benefits, including smarter, cleaner technologies for environmental protection, more efficient resource processing methods, and the evidence supporting their effectiveness.