Additive manufacturing of sodalite monolith for continuous heavy metal removal from water sources  

作　　者：Hengyu Shen Run Zou Yangtao Zhou Xing Guo Yanan Guan Duo Na Jinsong Zhang Xiaolei Fan Yilai Jiao 

机构地区：[1]Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China [2]School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China [3]Department of Chemical Engineering,The University of Manchester,Oxford Road,Manchester M139PL,United Kingdom [4]Science and Technology on Vacuum Technology and Physics Laboratory,Lanzhou Institute of Physics,Lanzhou 730010,China

出　　处：《Chinese Journal of Chemical Engineering》2022年第2期82-90,共9页中国化学工程学报（英文版）

基　　金：the Key Project on Intergovernmental International Science, Technology and Innovation (STI) Cooperation/STI Cooperation with Hong Kong, Macao;Taiwan of China’s National Key Research & Development Programme (2019YFE0123200);the National Natural Science Foundation of China (22078348);funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement (No. 872102)

摘　　要：Herein,we present a simple strategy for preparing monolithic sodalite adsorbents via sequential additive manufacturing and post-treatments.In detail,the method includes(i)3D printing of cylindrical monoliths using clay as the base material;(ii)thermal activation of the 3D-printed clay monoliths by calcination(to produce reactive alumina and silica species and enable mechanical stabilization);(iii)conversion of the activated clay monoliths to hierarchical porous sodalite monoliths via hydrothermal alkaline treatment.Parametric studies on the effect of calcination temperature,alkaline concentration and hydrothermal treatment time on the property of the resulting materials(such as phase composition and morphology)at different stages of preparation was conducted.Under the optimal conditions(i.e.,calcination temperature of 850℃,NaOH concentration of 3.3 mol·L^(-1),reaction temperature of 150℃,and reaction time of 6 h),a high-quality pure sodalite monolith was obtained,which possesses a relatively high BET surface area(58 m^(2)·g^(-1))and hierarchically micro-meso-macroporous structure.In the proposed application of continuous removal of heavy metals(chromium ion as the model)from wastewater,the developed 3D-printed sodalite monolith showed excellent Cr^(3+)removal performance and fast kinetics(~98%removal efficiency within 25 cycles),which outperformed the packed bed using sodalite pellets(made by extrusion).

关 键 词：Additive manufacturing CLAY Sodalite monolith Heavy metal removal 

分 类 号：TQ424[化学工程] X703[环境科学与工程—环境工程]