【摘要】 高效、低成本实现污水中磷元素的去除及回收对解决磷危机具有重要的意义。采用共沉淀法结合超声处理技术制备出一系列不同镍铁比(Ni∶Fe)的超薄镍铁水滑石(NixFe-LDHs)纳米片,通过构建水滑石Zeta电位和吸附磷酸根(PO43-)的能力与镍铁比的关系曲线,发现Zeta电位和结晶性能是影响LDHs吸附性能的2个重要内在因素。当Ni∶Fe为2∶1时,其对PO43-的吸附量可达248. 00 mg/g。在此基础上,通过适当的再生工艺,经过6次循环后,Ni2Fe-LDHs的再生效率仍可达59. 2%。更多还原

【Abstract】 The removal and recovery of phosphorus from wastewater in an efficient and cost-effective way are critical for resolving the phosphorus crisis. The ultra-thin NixFe-LDHs nanosheets with different molar ratio of Ni∶ Fe were fabricated by a co-precipitation method combined with ultrasonic treatment. The Zeta position and crystallinity played an important role in promoting the adsorption of LDH, which were observed in the relationship between the Zeta position, crystallinity and the molar ratio of Ni ∶ Fe. When the molar ratio of Ni ∶ Fe was 2 ∶ 1, the amount of phosphate adsorption could reach 248. 00 mg/g. The regenerative efficiency of Ni2 Fe-LDHs was still up to 59. 2% after adsorption and desorption for six cycles through proper regeneration technology.更多还原