不同压强下微波水热炭的制备及其磷吸附性能  

Preparation of microwave hydrochar and phosphorus adsorption properties under different pressure conditions

作　　者：张凯 韦秀丽 王冰[1,2] 施国中 杨玉鹏 ZHANG Kai;WEI Xiu-li;WANG Bing;SHI Guo-zhong;YANG Yu-peng(Agricultural Waste Recycling Technology and Equipment R&D Chongqing Key Laboratory,Chongqing 401329,China;Institute of Agricultural Engineering,Chongqing Academy of Agricultural Sciences,Chongqing 401329,China;Key Laboratory of Development and Application of Rural Renewable Energy,Ministry of Agriculture and Rural Areas,Chengdu 610041,China)

机构地区：[1]农业废弃物资源化利用技术与设备研发重庆市重点实验室,重庆401329 [2]重庆市农业科学院农业工程研究所,重庆401329 [3]农业农村部农村可再生能源开发利用重点实验室,四川成都610041

出　　处：《应用化工》2020年第6期1399-1403,共5页Applied Chemical Industry

基　　金：重庆市技术创新与应用示范专项(cstc2018jszx-zdyfxmX0009);农业部农村可再生能源开发利用重点实验室开放课题(2018-005);重庆农村一二三产融合典型模式及其关键技术集成与示范(NKY-2017AA001)。

摘　　要：研究利用蚯蚓粪为原料在不同压强条件下利用微波加热制备水热炭,以三格化粪池出水中磷为对象,利用水热炭进行吸附实验,同时探究了水热炭的磷脱附实验。研究表明当制备压强控制为2.5 MPa,微波加热时间为4 h,水热炭对磷的吸附效果最好,为1.8 mg/g,吸附量较2.0 MPa条件下制备的水热炭增加了14%,吸附过程符合准二级动力学方程和Freundlich等温方程。上述结果说明,蚯蚓粪水热炭对于去除粪污中磷及其回用具有巨大潜力。Earthworm manure was used as raw material to prepare hydrochar under different pressure conditions by microwave heating.Phosphorus in the effluent of three-cell septic tank was used as the object of adsorption experiment,and phosphorus desorption experiment of hydrochar was also explored.The results show that when the preparation pressure is controlled to 2.5 MPa and the microwave heating time is 4 h,the adsorption effect of hydrochar on phosphorus is the best,which is 1.8 mg/g.The adsorption capacity of phosphorus increases by 14%compared with prepared under 2.0 MPa.The adsorption process conforms to quasi-second-order kinetic equation and Freundlich isothermal equation.These results indicate that the hydrochar of earthworm manure has great potential for removing phosphorus from the excrement and its reuse.

关 键 词：水热炭 微波加热 压强控制 蚯蚓粪 磷吸附 

分 类 号：TQ426[化学工程] X703[环境科学与工程—环境工程]