梅雨时期空调表冷器对送风中真菌气溶胶的影响

梅雨季的长期高湿容易促进真菌滋生，使空调散发“霉味”。为明确这一特殊气候下空调送风过程中的真菌气溶胶吸入风险，在2021年6-7月的上海梅雨时期，试验研究了空调表冷器上下游真菌气溶胶浓度、粒径分布与群落的变化。结果表明：梅雨时期真菌在表冷器上滋生迅速，下游空气中真菌浓度相比上游增加约24.5%;表冷器对大粒径真菌表现出拦截效应，对小粒径真菌表现出滋生效应；大粒径(>4.70μm)真菌由于表冷器的拦截沉降而减少，而滋生效应使下游空气中的小粒径(0.65～1.10μm)真菌显著增多，且有害菌种如限制性马拉色菌(Malassezia restricta)、黑曲霉(Aspergillus niger)的相对丰度较大，增大了人员的吸入风险；在表冷器内的各排盘管表面，真菌浓度呈显著的“J”型分布特征。     

燃煤可吸入颗粒物及重金属汞控制技术研究进展

对燃煤电站锅炉可吸入颗粒物及重金属汞控制技术的国内外研究现状进行了总结,阐述了其基本原理和技术特点,并详细介绍了可吸入颗粒物及重金属汞脱除技术在世界上的最新研究成果,分析了其目前存在的问题和不足,提出了进一步的研究方向及联合脱除可吸入颗粒物及重金属汞的集成控制技术.     

烟蚜茧蜂防治烟蚜的应用前景分析

介绍了烟蚜茧蜂防治烟蚜技术研究与推广应用现状,对利用烟蚜茧蜂防治烟蚜的效果进行了分析评价;认为在今后烟蚜茧蜂推广应用中应进一步提升规模化繁殖与释放技术水平,加强繁蜂基地与专业技术队伍建设,推动烟蚜茧蜂产业化开发与利用,巩固烟蚜茧蜂在烟蚜生物防治中的地位与作用.     

Structural Performance and Characterization of Polyimide Doped Activated Carbon Fibers for Mercury Adsorption

Structure characteristics about activated carbon fibers (ACF) and polyimide (P84) doped ACF modified by HNO3 solution were studied to apply in mercury removal in coal-fired flue gases.The P84,which was always used in the non-woven fabric for bag filter,was intermingled with polyacrylonitrile-based ACF (PAN-ACF) in the weight ratio of 1:1 in order to make the doped ACF with P84 (doped-ACF-P84).Then the doped-ACF-P84 fibers were modified by HNO3 solution.The structure and morphology of doped-ACF-P84 were characterized and compared with those of ACF and doped-ACF-P84 modified by HNO3 solution.The results show that the modified doped-ACF-P84 fibers have almost the same pore structure and specific surface area comparing with the original one.However,contrasted with the original PAN-ACF,the doped-ACFP84 fibers modified by HNO3 solution have more oxygen-containing groups used for mercury removal.In particular,they have more lactone and carboxyl groups.