| Popis: |
【Objective】 Sedimentation and particle clogging is a phenomenon often occurring in irrigation pipe networks. The purpose of this paper is to investigate the feasibility and efficacy of magnetization on enhancing particle flocculation so as to alleviate sedimentation. 【Method】 We used suspension of kaolin clay at concentration of 0.5, 1, 1.5, 3 and 5 g/L as the testing particles, and mixed them with potassium sulfate at concentration of 0.25 g/L, urea at 0.5 g/L and compounded fertilizer at 0.75 g/L. Each solution was magnetized at strength at 0.2 T (W1), 0.4 T (W2) and 0.6 T (W3), respectively, with non-magnetization taken as the control (CK). We then let the suspension to settle in a cylinder, during which we measured the turbidity and median sedimentation velocity at the height of 10 cm, as well as the change in sedimentation composition, zeta potential, pH, conductivity and viscosity of the sample. 【Result】 Compared with CK, magnetization enhanced flocculation of the kaolin particles and increased its sedimentation as a result (p |
