ABSTRACT

The aim of this study was to evaluate the influence of preparation procedure of magnetically treated phosphate solutions and the evaluation time after the magnetic treatment, in the phosphorus adsorption on a Typic Hapludox soil, for different initial concentrations. The experimental treatments were defined by the combination of three evaluation times after magnetization (5 min, 60 min, and 24 hours), three forms of phosphate solution preparation (control, solution preparation with magnetic water, and phosphate solution magnetically treated), and five initial concentrations of phosphorus (50, 100, 150, 200 and 300 mg L⁻¹) obtained from solutions of purified NH₄H₂PO₄. The phosphorus adsorption evaluation was made by the decantation sorption method. To evaluate the adsorption behavior, the data were fitted to the Linear, Freündlich, Langmuir and Redlich-Peterson adsorption isotherm models. It was observed that magnetically treated phosphate solutions determined different phosphorus adsorption behavior and magnitudes than the untreated solution, with potential to decrease the amount of adsorbed phosphorus up to 60 minutes after treatment, for solutions prepared with previously magnetized water, and for up to 24 hours for magnetized phosphate solutions.

摘要

本研究的目的是评估磁处理磷酸盐溶液的制备程序和磁处理后的评估时间对典型 Hapludox 土壤磷吸附中不同初始浓度的影响。实验处理由磁化后三个评价时间（5 min、60 min 和 24 h）、三种形式的磷酸盐溶液制备（对照、用磁水制备溶液和磁化磷酸盐溶液）和 5从纯化的 NH ₄ H ₂ PO ₄溶液中获得的初始磷浓度（50、100、150、200 和 300 mg L ^{-1 ）}. 磷吸附评价采用倾析吸附法进行。为了评估吸附行为，将数据拟合到线性、Freündlich、Langmuir 和 Redlich-Peterson 吸附等温线模型。据观察，与未处理的溶液相比，经磁处理的磷酸盐溶液确定了不同的磷吸附行为和量级，对于使用先前磁化水制备的溶液和长达 24 小时，处理后最多 60 分钟可能会减少吸附磷的量用于磁化磷酸盐溶液。