针对我国中长期航天任务中载人航天器内生活废弃物舱内处理时,污染物在微重力环境中变化特征不明的现状，由中科院生态环境研究中心与中国航天员科研训练中心组成联合研究团队，构建电磁微重力悬浮实验平台,结合太空舱内生活废弃物中典型污染物的特点，开展卤代污染物的水热变化特征研究。将以含杂原子卤代污染物、卤代长链脂肪族污染物和卤代芳香族污染物为对象，探讨微重力环境下典型卤代污染物在超/亚临界水热条件下的脱卤降解特性，通过向反应体系中导入氧化剂和电子供体，解析催化脱卤机理与路径，勾画微重力环境中的催化脱卤路径图; 阐明微重力环境中的吸附-解吸和催化剂活性变化特征, 验证常规的地面重力环境吸附等温线和吸附动力学模型是否适合在太空微重力环境中使用;探知太空微重力环境与地球重力环境中卤代污染物的水热降解和催化脱卤的差异与共通之处，为我国中长期航天任务中载人航天器内污染废弃物的绿色处理方法的确立奠定理论基础。

This application is designed to identify the hydrothermal properties of typical halogenated pollutants in living waste under microgravity inside manned spacecraft during middle and long-term spaceflight mission. The project will be cooperated by Research Center for Eco-Environmental Sciences, Chinese Academy of Science (RCEES CAS) with China Astronaut Research and Training Center (CARTC). A electromagnetic microgravity simulating suspension experimental platform will be established by combining the electromagnetic microgravity facility of CARTC with the supercritical hydrothermal facility of RCEES CAS. Heteroatom, long chain aliphatic and aromatic halogenated pollutants will be employed as experimental materials based on the properties of typical pollutants in living waste in manned spacecraft. The dehalogenation properties of typical halogenated pollutants in super/subcritical hydrothermal conditions under microgravity condition will be examined. The dehalogenation mechanism and diagram will be analyzed through introducing oxidants and electron donors. The catalytic dehalogenation path diagram will be drawn. The changes of adsorption-desorption properties and catalyst activity under microgravity environment will be clarified. The applicability of common adsorption isotherms and adsorption kinetics models, which are applicable in ground gravity environment, under microgravity will be verified. The differences and similarities of halogenated pollutants in hydrothermal decomposition and catalytic dehalogenation under space microgravity and ground gravity environments will be investigated. The achievements of this study will establish the theoretical basis of for effective disposal of living wastes inside manned spacecraft during middle and long-term spaceflight mission.