| 引用本文: | 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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| 摘要: |
| 【目的】探究水磁化处理对富含黏性颗粒水肥溶液絮凝沉降过程的影响。【方法】配置5种质量浓度的高岭土悬浮液(0.5、1.0、1.5、3.0、5.0 g/L)和3种质量浓度肥料（0.25、0.5和0.75 g/L）的硫酸钾、尿素、复合肥混合液共14种，分别在4种不同磁化强度（W0：0 T、W1：0.2 T、W2：0.4 T和W3：0.6 T）下，测定4 h内沉降量筒底端10 cm高处的浊度、中值沉速、沉降泥沙机械组成、水样zeta电位、pH值、电导率和粘滞系数等的变化。【结果】与未磁化处理相比，磁化后高岭土颗粒的絮凝作用有所增强、沉降速率加快(p<0.01)；磁化强度为0.4 T(W2)时，黏性颗粒的絮凝作用最强，沉降泥沙的中值粒径比未磁化处理最高可增加14.7%，其黏粒占比最高可减少25.0%，zeta电位最高可降低68.7%。当水中加入不同肥料时，磁化对沉降泥沙中值粒径、黏粒占比和水样zeta电位值的影响不同，施加硫酸钾肥时磁化的影响效果最大，施加尿素时的影响效果最小。【结论】灌溉水磁化处理可显著促进细颗粒土的絮凝作用和沉降速率，建议用磁化水灌溉或者输水时，应定期冲洗管网系统，排除管网中的沉降泥沙。 |
| 关键词: 磁化；絮凝沉降；黏性颗粒；肥料类型；滴灌 |
| DOI： |
| 分类号:S275.6 |
| 基金项目:国家自然科学基金项目（52079112，51679205）,国家自然科学基金项目（面上项目，重点项目，重大项目） |
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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 |
