Soil aggregates play an important role in the migration and transformation of heavy metals. In this paper, solution adsorption and incubation experiments were carried out to explore the effects of soil texture (sandy loam and clay loam), nanominerals (nanomontmorillonite [nMt] and nanohydroxyapatite [nHA]), and pollution levels (5, 10, and 15 mg/kg) on the surface migration and transformation of cadmium in soil aggregates with different sized particles. The aim is to clarify the dynamics of cadmium in various particle size soil aggregates of different texture soils and demonstrate the positive effect of nanominerals on the partitioning and geochemical fractions of cadmium between the aggregates. The results showed that as the particle size decreased, the ability of the soil aggregates to carry cadmium initially decreased and then increased. Organic matter was the main factor influencing the cadmium distribution among the soil aggregates, whereas soil texture had no significant effect on the adsorption capacity of Cd²⁺ in the soil particles. The soil aggregates with sizes <15 μm had the highest cadmium accumulation capacity. As the cadmium concentration increased, cadmium ions were more likely to accumulate in soil aggregates with small particles (<15 μm). The application of nanominerals promoted the migration of cadmium to <15 μm particles from 2000 to 45 μm particles in sandy loam and 75-15 μm particles in clay. nHA also significantly improved the content of residual cadmium in the <15 μm portion of both soil textures. This study provides a theoretical basis for the use of nano-fixatives in environmental restoration applications.

土壤聚集体在重金属的迁移和转化中起着重要作用。本文通过溶液吸附和温育实验来研究土壤质地（砂壤土和黏土壤土），纳米矿物（纳米蒙脱土[nMt]和纳米羟基磷灰石[nHA]）以及污染水平（5、10和15）的影响。毫克/千克）对不同粒径的土壤团聚体中镉的表面迁移和转化的影响。目的是阐明镉在不同质地土壤的各种粒径土壤聚集体中的动力学，并证明纳米矿物对聚集体之间镉的分配和地球化学成分的积极作用。结果表明，随着粒径的减小，土壤团聚体携带镉的能力先降低后增加。²⁺在土壤颗粒中。小于15μm的土壤聚集体具有最高的镉积累能力。随着镉浓度的增加，镉离子更有可能在具有小颗粒（<15μm）的土壤团聚体中积累。纳米矿物的应用促进了镉从沙壤土中的2000到45μm颗粒和黏土中的75-15μm颗粒迁移到<15μm颗粒。nHA还显着提高了两种土壤质地的<15μm部分中的残留镉含量。该研究为在环境修复应用中使用纳米固定剂提供了理论基础。