Pisha sandstone (PS) can increase the ability of sandy soil to retain water and some nutrients due to the presence of montmorillonite, but its inadequate phosphorus adsorption capacity affects its phosphorus holding capacity. This study aims to determine whether Al modification can enhance the phosphate adsorption capacity of Pisha sandstone and to identify the adsorption mechanism. Batch adsorption kinetic and equilibrium isotherm experiments were conducted to investigate the phosphate adsorption behavior of Al-PS (Pisha sandstone modified with Al). The results showed that PS could be successfully modified with Al. As the Al modification ratio increased, the P adsorption capacities of Al-PS increased and the optimal Al-to-PS ratio was 0.81:1. Considering the modification cost and P removal efficiency, it was decided to apply 0.27:1 the Al-to-PS mass ratio in batch adsorption experiments and characterization. The phosphate adsorption capacity decreased but the removal rate increased with increasing amount of Al-PS. The temperature had no significant effect on the adsorption, and the adsorption kinetic and isothermal adsorption data could be well fitted by the pseudo-second-order and Temkin models, respectively. The phosphate adsorption mechanism of Al-PS for phosphate was proposed to be electrostatic adsorption. This study suggested that Al-PS could be considered to be an effective material for phosphate adsorption, and it could enhance the soil phosphorus content when added into sandy soil.

由于蒙脱石的存在，砂岩（PS）可以提高沙质土壤的水分和某些养分的吸收能力，但磷吸收能力不足会影响其磷保持能力。本研究旨在确定铝改性是否能增强enhance砂岩的磷酸盐吸附能力，并确定其吸附机理。进行了批量吸附动力学和平衡等温线实验，以研究Al-PS（用Al改性的Pisha砂岩）的磷酸盐吸附行为。结果表明，PS可以成功地被Al改性。随着Al改性比的增加，Al-PS的P吸附能力增加，最佳Al-PS比率为0.81：1。考虑到修改成本和P去除效率，决定采用0.27：1分批吸附实验和表征中Al与PS的质量比。随着Al-PS含量的增加，磷酸盐的吸附能力下降，但去除率却增加。温度对吸附没有显着影响，吸附动力学和等温吸附数据可以分别用拟二阶模型和Temkin模型拟合。提出Al-PS对磷酸盐的磷酸盐吸附机理为静电吸附。这项研究表明，Al-PS可以被认为是一种有效的磷酸盐吸附材料，当添加到沙质土壤中时，它可以提高土壤中的磷含量。温度对吸附没有显着影响，吸附动力学和等温吸附数据可以分别用拟二阶模型和Temkin模型拟合。提出Al-PS对磷酸盐的磷酸盐吸附机理为静电吸附。这项研究表明，Al-PS可以被认为是一种有效的磷酸盐吸附材料，当添加到沙质土壤中时，它可以提高土壤中的磷含量。温度对吸附没有显着影响，吸附动力学和等温吸附数据可以分别用拟二阶模型和Temkin模型拟合。提出Al-PS对磷酸盐的磷酸盐吸附机理为静电吸附。这项研究表明，Al-PS可以被认为是一种有效的磷酸盐吸附材料，当添加到沙质土壤中时，它可以提高土壤中的磷含量。