Aluminum doped magnetite (Fe₃O₄) magnetic nanoparticle (MNP) has been used as an effective sorbent to remove phosphorus (P) species in poultry processing wastewaters. It was found that spent MNP contains approximately 13% of P by weight. A study was conducted to evaluate the potential of using spent MNP as a P source. A total of 240 one-day-old male broilers were randomly allocated to four dietary treatments and six replicate each for 18 days. Treatments consisted of 1) positive control (PC) with 0.45% nonphytate-P (nPP); 2) negative control (NC) with a reduction of 0.15% nPP; 3) NC with additional 0.075% of P from magnetic nanoparticle (NC + 0.075% P-MNP); and 4) NC with additional 0.15% of P from magnetic nanoparticle (NC + 0.15% P-MNP). Body weight and feed intake were recorded at day 7, 14, and 18. Three birds were randomly selected from each cage for Dual-energy X-ray Absorptiometry (DXA) scanning at d18. The liver, heart, and spleen were collected and analyzed for mineral content. Ileal digesta were collected from the rest of the birds for P digestibility analysis. Data were subjected to SAS using one-way ANOVA model with GLM procedure. The birds fed with additions of 0.075% and 0.15% P from MNP had an increased (P = 0.017) body weight gain at d8 to d14 compared to those with NC diet. Significant lower (P ≤ 0.008) body mineral density and body mineral content were observed in the birds with NC diet compared to those with PC, NC + 0.075% P- magnetic nanoparticle, and NC + 0.15% P- magnetic nanoparticle diets. In addition, the birds with NC + 0.075% P- magnetic nanoparticle and NC + 0.15% P- magnetic nanoparticle had similar body mineral contents and body mineral densities compared to the PC-fed birds, indicating P from spent magnetic nanoparticle has incorporated into the bone mineralization. No significant differences were found between the treatments for mineral residues (Al and Fe) in liver, heart and spleen samples. The ileal P digestibility of dry matter and P was not influenced by the presence of magnetic nanoparticle in diets. In conclusion, 0.15% P from spent magnetic nanoparticle could be efficiently and safely used to replace the same amount P from dicalcium phosphate in the diets for broilers.

铝掺杂磁铁矿（Fe ₃ O ₄）磁性纳米颗粒（MNP）已被用作去除家禽加工废水中磷（P）种类的有效吸附剂。发现用过的MNP含有约13重量％的P。进行了一项研究，以评估将用过的MNP用作P来源的潜力。总共将240只1天大的雄性肉鸡随机分配到4种饮食处理中，每6个重复进行18天。处理包括：1）阳性对照（PC）和0.45％的非植酸-P（nPP）；2）阴性对照（NC），nPP降低0.15％；3）NC含磁性纳米粒子中额外的0.075％的P（NC + 0.075％P-MNP）; 4）NC中还含有来自磁性纳米粒子的0.15％的P（NC + 0.15％P-MNP）。在第7、14和18天记录体重和采食量。从每个笼子中随机选出三只鸟，在d18时进行双能X射线吸收测定（DXA）扫描。收集肝脏，心脏和脾脏，并分析其矿物质含量。从其他禽类中收集回肠消化物，以进行P消化率分析。使用单向ANOVA模型和GLM程序对数据进行SAS处理。 与NC饮食相比，在第8天至第14天时，从MNP中添加0.075％和0.15％的P的家禽体重增加（P = 0.017）。显着降低（P≤0.008）与使用PC，NC + 0.075％P-磁性纳米颗粒和NC + 0.15％P-磁性纳米颗粒的鸟类相比，NC饲喂的鸟类的身体矿物质密度和身体矿物质含量更高。此外，与PC饲喂的鸟类相比，NC + 0.075％P-磁性纳米颗粒和NC + 0.15％P-磁性纳米颗粒的禽类具有相似的身体矿物质含量和身体矿物质密度，这表明来自用过的磁性纳米颗粒的P已掺入了禽类骨矿化。肝脏，心脏和脾脏样品中矿物质残留（铝和铁）的处理之间没有发现显着差异。干物质和磷的回肠磷消化率不受日粮中磁性纳米粒子的影响。总结为0。