| Cite this article: | 王志超,张博文,李哲,等.聚丙烯微塑料对盐渍土水盐运移的影响[J].灌溉排水学报,0,():-. |
| WANG Zhichao,ZHANG Bowen,LI Zhe,et al.聚丙烯微塑料对盐渍土水盐运移的影响[J].灌溉排水学报,0,():-. |
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| DOI： |
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| Effect of polypropylene microplastics on water and salt transport in saline soil |
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WANG Zhichao1, ZHANG Bowen1, LI Zhe1, Cheng Guangyuan2, LI Wenlu1, LI Weiping1
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1.School of Energy and Environment,Inner Mongolia University of Science and Technology;2.Inner Mongolia Autonomous Region Water Resources Development Center
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| Abstract: |
| 【Background】Soil salinization is a worldwide problem, but there is a relative lack of research on the effect of microplastics on water and salt transport in saline soils under the coupling effect of microplastics and saline soils.【Objective】In order to explore the influence of microplastics on water and salt transport of saline soil with different salt content, 【Method】this experiment used the method of indoor soil tank simulation to clarify the influence of polypropylene (PP) microplastics on soil water, salt transport, and pH after water infiltration in horizontal and vertical directions of saline soil with different salt content. 【Result】The results showed that the higher the salt content in the saline soil, the higher the water content after infiltration. The average water content of the saline soil experimental group with 7.0% salt content was 9.4% and 11.2% higher than that of the 4% and 0.5% saline soil experimental groups respectively (P<0.05); When the salt content was 0.5%, 4.0% and 7.0%, the water content in the PP microplastics containing experimental group increased 7.8%, 9.4% and 6.2% (P<0.05) at the position 16.6 cm vertically from the infiltration point source, and increased 7.9%, 7.7% and 6.3% (P<0.05) at the position 12 cm horizontally from the infiltration point source, compared with the non-PP microplastics containing experimental group. The water content decreased with the increase of the distance from the infiltration point source; Compared with the experimental group without PP microplastics, the salt content of the experimental group with PP microplastics increased by 188.2%, 326.9%, and 163.2% respectively under three salt contents (P<0.05); At the same time, under the same salt content, the pH values of the experimental group containing PP microplastics at the same distance in the vertical and horizontal directions were higher than those of the experimental group without PP microplastics.【Conclusion】This study can provide a theoretical basis for analyzing the mechanism of water and salt transport in saline soil under the condition of microplastic storage. |
| Key words: saline soil;microplastic;salt;the moisture content;pH |
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