| 引用本文: | 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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| 摘要: |
| 【目的】为探究微塑料对不同盐分盐渍土水盐运移的影响,【方法】采用室内土槽模拟的方法,阐明了聚丙烯(Polypropylene, PP)微塑料对不同含盐量盐渍土水平及垂直方向水分入渗后土壤水分、盐分运移及pH的影响。【结果】盐渍土中的含盐量越高入渗后含水率越高,含盐量为7.0%的盐渍土实验组较4.0%和0.5%的盐渍土实验组平均含水率分别增加9.4%和11.2%(P<0.05)；在含盐量为0.5%、4.0%和7。0%条件下,赋存PP微塑料实验组较未赋存微塑料实验组在垂直距入渗点源16.6cm位置含水率分别增加7.8%、9.4%和6.2%(P<0.05),在水平距入渗点源12 cm位置含水率分别增加7.9%、7.7%和6.2%(P<0.05)且呈现出随距入渗点源的距离增加含水率降低的趋势；在3种含盐量条件下赋存PP微塑料的实验组较未赋存PP微塑料的实验组盐分则分别增加188.2%、326.9%和163.2%(P<0.05)；同时赋存PP微塑料的实验组在相同含盐量条件下,其在垂直、水平方向相同距离的pH值均呈现出大于未赋存PP微塑料的实验组的趋势。【结论】本研究可以为分析微塑料赋存条件下盐渍土水盐运移影响的机制研究提供理论依据。 |
| 关键词: 盐渍土;微塑料;盐分;含水率;pH |
| DOI： |
| 分类号:X172 |
| 基金项目:国家自然科学(42007119)通讯作者：李卫平(1973-),男,博士,教授,主要从事北方寒旱区湖泊水生态治理与修复研究,E-mail：sjlwp@163.com |
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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 |
