聚合物改性膨润土在盐水中的膨胀性能实验研究  

Inflation Performance Study of Polymer Modified Bentonite in Salt Water

作　　者：胡志强[1] 祝建中[1] 洪陵成[1] 史海波[1] 丁莹[1] 崔延松[2] 

机构地区：[1]河海大学浅水湖泊综合治理与资源开发教育部重点实验室,河海大学环境学院,江苏南京210098 [2]南通大学交通学院,江苏南通226019

出　　处：《当代农业（中英文版）》2015年第1期1-6,共6页Journal of Modern Agriculture

基　　金：受教育部留学人员回国启动基金支持资助（No.1061-51200312）.

摘　　要：我国北方农业灌溉需要大量水源，目前灌溉方式主要为渠道灌溉，但每年因渠道渗漏而浪费了近一半的农业用水。膨润土具有膨胀好、渗透低的特点，是一种优良的防水材料，广泛用于各种防渗工程。但研究表明，盐渍条件会显著降低膨润土的防渗能力，而北方地区大多盐渍化严重。实验发现，向膨润土中混合高分子吸水树脂能有效改善膨润土耐盐渍性差的缺点。当吸水性有机酸盐树脂与TSPP或吸水性有机酸盐树脂与吸水性纤维树脂按最佳比例与膨润土混合，膨润土在1％的盐水中膨胀指数可达15mL／2g以上，完全满足膨润土材料的防渗要求，可用于复杂水体或水体条件不明的防渗工程。解决了北方盐渍地区农业灌溉过程中的渗漏问题，实现了节水灌溉，促进农业生产和发展的目的。Every year, irrigated agriculture in the north in China requires lots of water. The current irrigation method, Charmel irrigation, wasted nearly half of agricultural water each year due to the channel seepage. Bentonite is an excellent waterproof material, with the characteristics of good expansion properties and low permeability, which has been widely used in all kinds of anti-seepage engineering. However, it was found that saline conditions could significantly reduce the ability of bentonite seepage. What＇s more, northern areas were mostly salted seriously. Studies found that the salt tolerance of bentonite would be effectively improved when mixed with some kinds of high molecular polymer. The results showed that, when mixed with absorbent organic acid resin and TSPP or absorbent organic acid resin and absorbent fiber resin at the best proportion, the inflation index of bentonite could reach to 15mL/2g in 1% of the salt water, which completely met the requirements of bentonite waterproof material, and could be used for seepage-proofing in complicated or unknown water. In conclusion, this study solved the leakage problem in the process of agricultural irrigation anti realized the water-saving irrigation, which improved the production and development of the agriculture

关 键 词：渠道灌溉 膨润土 膨胀指数 高分子吸水树脂 

分 类 号：S[农业科学]