Zhou Xiaohou, Xu Dejun, Xu Dehua, Yan Zhengjuan, Zhang Zhiye, Zhong Benhe, Wang Xinlong
Ministry of Education Research Center for Comprehensive Utilization and Clean Processing Engineering of Phosphorus Resources, School of Chemical Engineering, Sichuan University, Chengdu 610065, PR China.
ACS Omega. 2022 Sep 26;7(40):35885-35900. doi: 10.1021/acsomega.2c04534. eCollection 2022 Oct 11.
Water-soluble ammonium polyphosphate (APP) has the advantages of good solubility and slow-release characteristics and has the potential to be used in combination with monoammonium phosphate (MAP) as a high phosphorus content slow-release fertilizer to improve the utilization rate of phosphorus during irrigation. Herein, the effects of the APP1 concentration and temperature (278.2-313.2 K) on the solubility of MAP, solution density, and pH value in the ternary equilibrium system (APP1-MAP-water) were measured. The simplified Apelblat model, two empirical polynomials, and rational two-dimensional functions can describe the experimental solubility data, solution density, and pH value well, respectively, with reliable modeling parameters ( > 0.99). In the OptiMax1001 reactor, the focused beam reflectance measurement (FBRM), the particle-view measurement (PVM), and the ReactIR 15 probes were used to observe and reverse verify that they can be synergistically codissolved to achieve economic efficiency. Basic thermodynamic data and models can guide their collaborative application in irrigation to improve the phosphorus utilization rate.
水溶性聚磷酸铵(APP)具有良好的溶解性和缓释特性,有潜力与磷酸一铵(MAP)复配作为高磷含量缓释肥料,以提高灌溉过程中磷的利用率。在此,测定了APP1浓度和温度(278.2 - 313.2 K)对三元平衡体系(APP1 - MAP - 水)中MAP溶解度、溶液密度和pH值的影响。简化的Apelblat模型、两个经验多项式和有理二维函数分别能很好地描述实验溶解度数据、溶液密度和pH值,建模参数可靠(> 0.99)。在OptiMax1001反应器中,使用聚焦光束反射测量(FBRM)、颗粒视图测量(PVM)和ReactIR 15探头进行观察和反向验证,结果表明它们可以协同共溶解以实现经济效益。基础热力学数据和模型可为它们在灌溉中的协同应用提供指导,以提高磷利用率。