The removal of phosphate (nutrient) and E. coli (pathogen) from secondary effluent is of great importance to control the water quality of the receiving water bodies. In this study, magnetic porous NiLa-layered double oxides (NiLa-LDOs/Fe₃O₄) were synthesized using a simple co-precipitation method. NiLa-LDOs/Fe₃O₄ exhibited a high phosphate adsorption capacity of 203.10 mg g⁻¹ in batch adsorption experiments, which can mostly be maintained within the pH range (5.5–8.5) and ionic strength range (5–20 mM) of secondary effluent, and in the presence of commonly co-existing species (anions and organics). NiLa-LDOs/Fe₃O₄ were further evaluated in real secondary effluent and the homogenous surface diffusion model (HSDM) was used to predict the performance in field applications. Under typical conditions, NiLa-LDOs/Fe₃O₄ can last for ∼1845–2448 bed volumes (BVs) before the phosphate concentration in the effluent exceeds the monthly average limit of 1 mg L⁻¹ P. Good regeneration capacities were also demonstrated in cyclic adsorption-desorption runs in both synthetic solution and secondary effluent. In addition, the presence of Ni and La species greatly enhanced the antibacterial performance of the NiLa-LDOs/Fe₃O₄ toward E. coli. Results obtained from this study indicate porous NiLa-LDOs/Fe₃O₄ can be a promising multifunctional material for the treatment of secondary effluent.

从次级废水中去除磷酸盐（营养物）和大肠杆菌（病原体）对于控制接收水体的水质非常重要。在这项研究中，使用简单的共沉淀法合成了磁性多孔NiLa层状双氧化物（NiLa-LDOs / Fe ₃ O ₄）。在分批吸附实验中，NiLa-LDOs / Fe ₃ O ₄的磷酸盐吸附能力高，为203.10 mg g ^-1，大部分可保持在pH范围（5.5-8.5）和离子强度范围（5-20​​ mM）内。次要废水，并且存在共同存在的物种（阴离子和有机物）。NiLa-LDOs / Fe ₃ O ₄在实际的二级废水中进行了进一步评估，并使用同质表面扩散模型（HSDM）预测了现场应用的性能。在典型条件下，NiLa-LDOs / Fe ₃ O ₄在废水中的磷酸盐浓度超过月平均限值1 mg L ^-1 P之前，可持续约1845-2448床体积（BVs）。还显示了良好的再生能力循环吸附-解吸在合成溶液和次级废水中均进行。另外，Ni和La物种的存在大大增强了NiLa-LDOs / Fe ₃ O ₄对大肠杆菌的抗菌性能。从这项研究获得的结果表明，多孔的NiLa-LDO / Fe₃ O ₄可能是用于处理次级废水的有前途的多功能材料。