Synthesis of biochar-loaded green synthetic iron nanocomposite and passivation mechanism of cadmium in pig manure aerobic composting

IF 7.1 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation Pub Date : 2025-07-18 DOI:10.1016/j.eti.2025.104377

Wenqing Yang , Yuanping Zhong , Zeyang Lu , Daifeng Lin , Qian Zhuo , Haifang Zeng , Deming Yang , Zuliang Chen

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引用次数: 0

Abstract

Heavy metal contamination, especially cadmium (Cd), in pig manure poses significant environmental challenges to agriculture. This study utilized pig manure as a raw material for biochar production and employed tea tree waste leaf extract to reduce iron ions, synthesizing biochar-loaded green synthetic iron nanoparticles (PBC@G-nFe). The PBC@G-nFe was then applied in the composting of pig manure to investigate its effects on the morphological changes of cadmium during the composting process, providing a sustainable solution. The results demonstrated that PBC@G-nFe significantly enhanced composting efficiency. At the optimal 5 % addition rate, the residual cadmium content increased by 31.91 %, and its bioavailability decreased by 57.65 %. This method promoted heavy metal passivation through the formation of metal phosphate precipitates, offering a feasible solution for the safe use of agricultural waste. Future research should focus on optimizing the cost-effectiveness and scalability of this method, while evaluating its long-term impact on soil health and crop growth.

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生物炭负载绿色合成铁纳米复合材料的合成及猪粪好氧堆肥中镉的钝化机理

猪粪中的重金属污染，特别是镉（Cd）对农业造成了重大的环境挑战。本研究以猪粪为原料生产生物炭，利用茶树废叶提取物还原铁离子，合成生物炭负载的绿色合成铁纳米颗粒（PBC@G-nFe）。然后将PBC@G-nFe应用于猪粪堆肥中，研究其对堆肥过程中镉形态变化的影响，提供可持续解决方案。结果表明，PBC@G-nFe显著提高了堆肥效率。在最佳添加率为5 %时，镉残留量提高31.91 %，生物利用度降低57.65 %。该方法通过形成金属磷酸盐沉淀促进重金属钝化，为农业废弃物的安全利用提供了可行的解决方案。未来的研究应侧重于优化该方法的成本效益和可扩展性，同时评估其对土壤健康和作物生长的长期影响。

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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.