Guangxi Key Lab of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
Guangxi Key Lab of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
J Hazard Mater. 2015 Dec 15;299:711-8. doi: 10.1016/j.jhazmat.2015.08.006. Epub 2015 Aug 5.
A type of novel free-sintering and self-supporting inorganic membrane for wastewater treatment was fabricated in this study. This inorganic membrane was synthesised using metakaolin and sodium silicate solutions moulded according to a designed molar ratio (SiO2/Al2O3=2.96, Na2O/Al2O3=0.8 and H2O/Na2O=19) which formed a homogenous structure and had a relative concentration pore size distribution, via scanning electron microscopy (SEM) and Brunauer-Emmett-Teller (BET) analyses. In this work, the Ni(2+) removal effect of geopolymer inorganic membrane was studied under different pH value, initial concentration of Ni(2+) solutions and initial operation temperature. Results showed that geopolymer inorganic membrane efficiently removes Ni(2+) from wastewater because of the combined actions of the adsorption and rejection of this membrane on Ni(2+) during membrane separation. Therefore, geopolymer inorganic membrane may have positive potential applications in removing Ni(2+) or other heavy metal ions from aqueous industrial wastewater.
本研究制备了一种用于废水处理的新型自支撑无压烧结无机膜。该无机膜是通过将高岭土和硅酸钠溶液按照设计的摩尔比（SiO2/Al2O3=2.96，Na2O/Al2O3=0.8 和 H2O/Na2O=19）成型，形成均匀的结构和相对浓度的孔径分布，然后通过扫描电子显微镜（SEM）和 Brunauer-Emmett-Teller（BET）分析合成的。在这项工作中，研究了不同 pH 值、初始 Ni(2+)浓度和初始操作温度下，聚硅酸盐无机膜对 Ni(2+)的去除效果。结果表明，由于膜分离过程中聚硅酸盐无机膜对 Ni(2+)的吸附和排斥作用，该膜能够有效地去除废水中的 Ni(2+)。因此，聚硅酸盐无机膜在去除废水中的 Ni(2+)或其他重金属离子方面可能具有积极的潜在应用。
