不同粒径保水剂吸水特性及其对土壤物理性能的影响

Abstract

Abstract: In this paper, the effects of super absorbent polymer (SAP) on soil physical and chemical properties and the relationships among water absorbent capacity of SAP with three different granularities (2.0-3.2 mm, 1.0-2.0 mm and 0.5-1.0 mm) were studied in laboratory. The results showed that there was a negative correlation between water absorbent rate and SAP granularity. Soil moisture content could be significantly increased and soil evaporationcould be restricted after applying SAP. Soil pH value and electrical conductivity could be increased after　applying SAP, the proportion of liquid phase in soil could be increased, but that of gas phase decreased, and soil permeability could also be decreased. In general, the improving effects of SAP with medium granularity on soil physical and chemical properties, such as soil water content, pH value, total porosity, permeability and electrical conductivity, were the highest, especially when the proportion of applied SAP was 0.1%.

Key words: super absorbent polymer (SAP), granularity, permeability, soil moisture content, electrical conductivity, sandy soil

LI Xing, JIANG Jin, SONG Chun-Wu, CHEN Ming- , ZHANG Yun-Chao, ZHANG Heng. Water Absorbent Capacity of Super Absorbent Polymer with Different Granularities and Its Effect on Soil Physical Properties[J]., 2012, 29(4): 609-614.

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Water Absorbent Capacity of Super Absorbent Polymer with Different Granularities and Its Effect on Soil Physical Properties

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