Sulfurized nano zero-valent iron loaded graphene oxide enhances the anaerobic fermentation treatment of swine manure: Insights from microbial community analysis and DFT calculations硫化纳米零价铁负载石墨烯氧化物增强了猪粪厌氧发酵处理:微生物群落分析和DFT计算的研究视角Journal of Environmental ManagementIF8.42025-10-180PRE