Abstract Graphene oxide (GO) addition is a simple, cost effective, and efficient way to accelerate compost maturation, however, little research focused on the mechanism of GO-based aerobic composting. The present study aimed to determine the effects of GO on the physicochemical and biological characteristics during pig manure composting. Four treatments were conducted with the addition of GO (0, 0.1 %, 0.25 % and 0.5 % dry weight of the composting mass, respectively). Results showed that the GO addition effectively promoted physicochemical parameters and compost maturity, and particularly improved the seed germination index (GI), with 0.25 % GO addition had the highest GI of 112% at the end of composting. The GO addition also significantly improved the organic matter degradation and reduced nitrogen loss. Beneficial properties of GO optimized composting environment, accelerated the process of composting and facilitated microbial growth during the composting process. The contents of exchangeable Cu and Zn significantly were reduced by GO addition after composting, and the 0.5 % GO respectively contributed 74.86 % and 43.05 % of the Cu and Zn passivation. Generally, 0.25 % GO addition was beneficial for microbial growth and compost maturity, while 0.5 % GO addition effectively reduced nitrogen loss and the heavy metals mobility during the composting process.

中文翻译：

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氧化石墨烯引起猪粪堆肥过程中处理性能、微生物群落动态和重金属形态的变化

摘要 添加氧化石墨烯 (GO) 是一种简单、经济且有效的加速堆肥成熟的方法，然而，很少有研究关注基于 GO 的好氧堆肥机制。本研究旨在确定 GO 对猪粪堆肥过程中理化和生物学特性的影响。在添加 GO（分别为堆肥质量的 0、0.1%、0.25% 和 0.5% 干重）的情况下进行了四次处理。结果表明，GO添加有效促进了理化参数和堆肥成熟度，特别是提高了种子发芽指数（GI），0.25%的GO添加在堆肥结束时的GI最高，为112%。添加GO还显着改善了有机物降解并减少了氮损失。GO 的有益特性优化了堆肥环境，加速了堆肥过程并促进了堆肥过程中的微生物生长。堆肥后添加GO显着降低了可交换Cu和Zn的含量，0.5%的GO分别贡献了74.86%和43.05%的Cu和Zn钝化。一般来说，0.25%的GO添加有利于微生物生长和堆肥成熟，而0.5%的GO添加有效减少了堆肥过程中的氮损失和重金属迁移。05% 的 Cu 和 Zn 钝化。一般来说，0.25%的GO添加有利于微生物生长和堆肥成熟，而0.5%的GO添加有效减少了堆肥过程中的氮损失和重金属迁移。05% 的 Cu 和 Zn 钝化。一般来说，0.25%的GO添加有利于微生物生长和堆肥成熟，而0.5%的GO添加有效减少了堆肥过程中的氮损失和重金属迁移。