Kalak Tomasz, Tachibana Yu
Poznań University of Economics and Business, Institute of Quality Science, Department of Industrial Products and Packaging Quality Niepodległości 10 61-875 Poznań Poland
Department of Nuclear System Safety Engineering, Graduate School of Engineering, Nagaoka University of Technology 1603-1, Kamitomioka Nagaoka Niigata 940-2188 Japan.
RSC Adv. 2021 Jun 21;11(36):21964-21978. doi: 10.1039/d0ra09092a.
Fly ash and slag were produced as a result of the incineration of municipal sewage sludge using the circulating fluidized bed combustion (CFBC) technology and were examined for the simultaneous recovery of lithium and uranium from seawater in batch adsorption experiments. These waste materials have been characterized in terms of their physicochemical properties using several research methods including particle size distribution, bulk density, SEM-EDS analysis, thermogravimetry, SEM and TEM morphology, BET, specific surface area, pore volume distribution by the BJH method, ATR FT-IR, and zeta potential. The fly ash and slag waste materials showed the following research results for Li-ion recovery: adsorption efficiency 12.1% and 6.8%, adsorption capacity 0.55 mg g and 0.15 mg g, respectively. Better results were reported for U ion recovery: adsorption efficiency 98.4% and 99.9%, adsorption capacity 21.3 mg g and 56.7 mg g for fly ash and slag, respectively. In conclusion, the conducted research revealed that CFBC fly ash and slag are promising low-cost adsorbents for the effective recovery of Li and U ions from seawater.
采用循环流化床燃烧（CFBC）技术焚烧城市污水污泥产生了粉煤灰和炉渣，并通过批量吸附实验研究了它们从海水中同时回收锂和铀的情况。利用多种研究方法对这些废料的物理化学性质进行了表征，包括粒度分布、堆积密度、扫描电子显微镜-能谱分析（SEM-EDS分析）、热重分析、扫描电子显微镜和透射电子显微镜形态分析、比表面积测定（BET）、比表面积、采用BJH法的孔体积分布、衰减全反射傅里叶变换红外光谱（ATR FT-IR）以及zeta电位。粉煤灰和炉渣废料在锂离子回收方面呈现出以下研究结果：吸附效率分别为12.1%和6.8%，吸附容量分别为0.55 mg/g和0.15 mg/g。在铀离子回收方面有更好的结果：粉煤灰和炉渣的吸附效率分别为98.4%和99.9%，吸附容量分别为21.3 mg/g和56.7 mg/g。总之，所进行的研究表明，CFBC粉煤灰和炉渣是从海水中有效回收锂和铀离子的有前景的低成本吸附剂。
