Li Yaoyue, Zhou Yanbo, Zhou Yi, Lei Juying, Pu Shengyan
Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, East China University of Science and Technology, No. 130, Meilong Road, Shanghai 200237, China E-mail:
State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, No. 130, Meilong Road, Shanghai 200237, China.
Water Sci Technol. 2018 Dec;78(12):2553-2563. doi: 10.2166/wst.2019.009.
A filter paper was functionalized with β-cyclodextrin and citric acid via esterification reaction for the removal of dyes and Cu ions from aqueous solutions. The adsorption capacity and removal performance of the modified filter paper (MFP) was investigated using static and dynamic adsorption experiments. The static adsorption data fit well the Langmuir and pseudo-second-order models, and the adsorption capacity of Methylene Blue (MB), Brilliant Green (BG), Rhodamine-B (RB) and Cu(II) over the MFP were 124.6 mg/g, 130.4 mg/g, 99.7 mg/g and 39.1 mg/g, respectively, which are much higher than the unmodified filter paper (below 2 mg/g). Even better, the decolorization performance and Cu(II) removal of MFP are remarkable in dynamic adsorption. The effluent can reach the National Standard for dyeing and finishing of textile industry of China after three cycles in a continuous filtration-adsorption system. This method provides a new pathway to achieve high efficiency removal of dyes and metal ions from wastewater.
通过酯化反应，用β-环糊精和柠檬酸对滤纸进行功能化处理，以从水溶液中去除染料和铜离子。采用静态和动态吸附实验研究了改性滤纸（MFP）的吸附容量和去除性能。静态吸附数据很好地拟合了朗缪尔模型和准二级模型，MFP对亚甲基蓝（MB）、亮绿（BG）、罗丹明B（RB）和Cu（II）的吸附容量分别为124.6 mg/g、130.4 mg/g、99.7 mg/g和39.1 mg/g，远高于未改性滤纸（低于2 mg/g）。更出色的是，MFP在动态吸附中对染料的脱色性能和对Cu（II）的去除效果显著。在连续过滤-吸附系统中经过三个循环后，流出物可达到中国纺织工业染整国家标准。该方法为实现废水中染料和金属离子的高效去除提供了一条新途径。
