| Cite this article: | 赵雪,王照熙,张文倩,等.磁化对黏性颗粒絮凝沉降的影响[J].灌溉排水学报,2022,():-. |
| ZHAO XUE,WANG Zhaoxi,ZHANG Wenqian,et al.磁化对黏性颗粒絮凝沉降的影响[J].灌溉排水学报,2022,():-. |
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| DOI： |
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| The effect of magnetization on the flocculation and sedimentation of viscous particles |
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ZHAO XUE,WANG Zhaoxi,ZHANG Wenqian,et al
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Northwest Agriculture and Forestry University of Science and Technology
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| Abstract: |
| 【Objective】To explore the effect of water magnetization treatment on the flocculation and sedimentation process of water and fertilizer solutions rich in viscous particles. 【Method】 Prepare 5 concentrations of kaolin suspension (0.5, 1, 1.5, 3, 5g/L) and 3 kinds of fertilizer concentrations (0.25, 0.5 and 0.75g/L) of potassium sulfate, urea, and compound fertilizer mixture. 14 kinds, respectively, under 4 different magnetization strengths (W0:0T, W1:0.2T, W2:0.4T and W3:0.6T), the turbidity and median sedimentation velocity at the height of 10cm at the bottom of the sedimentation cylinder within 4h were measured , Changes in the mechanical composition of sedimentation, zeta potential, pH value, conductivity and viscosity coefficient of water samples.【Result】Compared with the unmagnetized treatment, the flocculation of kaolin particles after magnetization is strengthened and the sedimentation rate is accelerated (p<0.01); when the magnetization intensity is 0.4T (W2), the flocculation of viscous particles is the strongest, and the sedimentation of silt is strongest. Compared with the unmagnetized treatment, the median particle size can be increased by 14.7%, the proportion of clay particles can be reduced by 25.0%, and the zeta potential can be reduced by 68.7%. When different fertilizers are added to the water the effect of magnetization on the median size of sedimentation sediment, the proportion of clay particles and the zeta potential of the water sample is different. The effect of magnetization is the largest when potassium sulfate is applied, and the effect is the smallest when urea is applied. 【Conclusion】Magnetized irrigation water can significantly promote the flocculation and sedimentation rate of fine-grained soil. It is recommended that the pipe network system should be flushed regularly to remove the sedimentation sediment in the pipe network when using magnetized water for irrigation or water delivery. |
| Key words: magnetization; flocculation settlement; viscous particles; fertilizer type; drip irrigation |
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