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土壤特性对保水剂吸水性能的影响
引用本文:闫永利,于健,魏占民,张俊生,王志刚.土壤特性对保水剂吸水性能的影响[J].农业工程学报,2007,23(7):76-79.
作者姓名:闫永利  于健  魏占民  张俊生  王志刚
作者单位:1. 内蒙古农业大学水利与土木建筑工程学院,呼和浩特,010018
2. 内蒙古水利科学研究院,呼和浩特,010020
3. 内蒙古农业大学农学院,呼和浩特,010019
基金项目:国家高技术研究发展计划(863计划)
摘    要:该文测试了保水剂与砂壤土、壤砂土、砂黏壤土1和砂黏壤土2四种土壤混合后的吸水倍率,研究了土壤特性对保水剂吸水性能的影响,混合时土壤为风干土,保水剂与土壤的混合比例为0.5%。结果表明:与对照相比,保水剂与土壤混合后明显降低了吸水倍率,且随着吸水时间加长,降低幅度增大。吸水10 min后,吸水倍率下降14.4%~58.0%,70 min后,下降41.8%~90.2%。研究认为:吸水初期,吸水倍率主要受土壤孔隙特性的影响,随着吸水时间的加长,土壤溶液中离子增多,对保水剂吸水倍率产生了影响。土壤溶液中离子量与黏粒含量有关,黏粒含量高,土壤溶液中离子量大,反之则小,保水剂在黏粒含量高的土壤中的吸水倍率较在黏粒含量低的土壤中低。与土壤混合还改变了保水剂的吸水规律,对照中,吸水倍率随着吸水时间加长而加大,达到最大后趋于稳定;而在土壤中,短时间内吸水倍率达到最大,随着吸水时间加长,吸水倍率逐渐下降。

关 键 词:保水剂  土壤特性  吸水倍率  吸水时间
文章编号:1002-6819(2007)7-0076-04
收稿时间:2006/8/16 0:00:00
修稿时间:2006-08-162006-12-18

Effects of soil properties on water absorption of super absorbent polymers
Yan Yongli,Yu Jian,Wei Zhanmin,Zhang Junsheng and Wang Zhigang.Effects of soil properties on water absorption of super absorbent polymers[J].Transactions of the Chinese Society of Agricultural Engineering,2007,23(7):76-79.
Authors:Yan Yongli  Yu Jian  Wei Zhanmin  Zhang Junsheng and Wang Zhigang
Institution:Water Conservancy and Civil Engineering College, Inner Mongolia Agricultural University, Huhhot 010018, China;Water Resources Research Institute of Inner Mongolia, Huhhot 010020, China;Water Conservancy and Civil Engineering College, Inner Mongolia Agricultural University, Huhhot 010018, China;Water Resources Research Institute of Inner Mongolia, Huhhot 010020, China;Agricultural College, Inner Mongolia Agricultural University, Huhhot 010019, China
Abstract:The water absorption ratio of four super absorbent polymers(SAP) mixed with four different kinds of soil which are sand loamy soil,loamy sand soil,sand clay soil 1 and sand clay soil 2,were tested.Effects of soil properties on water absorption of the SAP,were analyzed.The soils that mixed with SAP were dry and the proportion of SAP to soil was 0.5%.Results show that water absorption ratio of SAP decreases remarkably compared with controls(SAP soaked in TAP water without soils).The decrease trend increase with time for water absorption.The water absorption ratio of four kinds of SAP decreases by 14.4%~58.0% in 10 minutes and by 41.8%~90.2% in 70 minutes.At the beginning of absorption in the soils,the water absorption ratio of SAP is restricted by the soil porosity and is affected gradually by ions in solution as absorption time increase because solvent ions in soils is increased.The quantity of solvent soil ions is related to the clay percent.The higher clay percent the soil contains,the more solvent ions exist in the solution.Conversely the lower clay percent the soil has,the less solvent ions present in solution,the water absorption ratio is lower in the soil that its clay percent is higher than in the soil which its clay percent is lower.Soil properties not only reduce water absorption ratio of SAP,but also change the regulation of water absorption of SAP.For the controls,water absorption ratio increases with the increase of water absorption time and then remains unchanged while the water absorption ratio decreases with the increase of absorption time after 10 minutes absorption for the treatments which SAP are mixed with soils.
Keywords:super absorbent polymer  soil properties  water absorption ratio  water absorption time
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