木质吸附剂去除水中污染物的应用及机理研究

Application and mechanism of wood adsorbent for removing pollutants from water

木质生物材料来源广泛,可再生,对环境友好,根据制备工艺方式的不同,将制成的木质吸附剂分为五大类:木质生物本体、木质活性炭、木陶瓷、木质气凝胶、木质活性炭纤维,并根据经济成本、物理性质等工艺特性进行总结。调查了去除水中污染物时,木质吸附剂的改性及与其它处理方式进行联用的方法,通过赋予木质吸附剂对特定污染物产生新的特性,增强对特定污染物的吸附效果。介绍了吸附等温线模型和动力学模型,重点讨论了模型假设理论和模型特点,从而通过吸附数据的拟合,宏观地表现出微观吸附机理,并指出了一些木质吸附剂去除水中污染物时存在的问题。

Woody biomaterials are widely available,renewable,and environmentally friendly.The wood adsorbents are classified into five categories:woody biomass,woody activated carbon,wood ceramics,wood aerogel,and woody activated carbon fiber,according to their preparation process methods and physical properties,and according to economic costs,physical properties,and other process characteristics.Investigate the modification of wood adsorbents and their coupling with other treatment methods for removing pollutants from water and enhancing the adsorption of specific pollutants by imparting new properties to the wood adsorbents for specific pollutants.The adsorption isotherm and kinetic models are presented,focusing on the theory of model assumptions and model characteristics.Thereby,the microscopic adsorption mechanism is macroscopically represented through the fitting of adsorption data and points out the problems of some wood adsorbents in removing pollutants from water.