| 生活垃圾填埋场覆盖层水分调控之保水剂筛选研究 |
| 摘要点击 1650 全文点击 1299 投稿时间：2009-03-23 修订日期：2009-06-29 |
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| 中文关键词 聚丙烯酰胺（PAM） 保水剂 持水性能 生活垃圾 覆盖层 |
| 英文关键词 polyacrylamide (PAM) water retention agent(WRA) water retention property municipal solid waste landfill cover |
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| 中文摘要 |
| 聚丙烯酰胺（PAM）类高分子合成材料对有机无机物具有较强的絮凝、吸附作用.选择10种水溶性以及4种非水溶性PAM保水剂，通过考察相对分子质量、离子类型、离子度、粒径等性状对保水性能和使用寿命的影响，对各种剂型的保水能力进行比较，确定了以持水性、重复使用性和抗干扰性为主要筛选因素的评判体系，筛选出最佳材料——非水溶性的JB和水溶性的WSN20两种剂型的保水剂.其中JB能使基质砂的饱和水合度增加32%.而加压式多步出流试验表明，垃圾中添加0.1% JB可改善其渗透性、提高持水性能、减缓渗漏，表现为基质势26. |
| 英文摘要 |
| Synthetic materials of polyacrylamide (PAM) are known as the flocculating agent as well as water retention agents. In this study,ten types of water-soluble PAM as well as four types of water-insoluble ones were selected and the influences of relative molecular weight,ion types,charge density and particle size on water retention and service life were determined. Based on the results,evaluation method for performance of water retention agent was established and two optimal PAM (water-insoluble JB and water-soluble WSN20) were screened for further study. It showed that JB increased the degree of hydration of testing soil for 32% compared with that of control. Moreover,multiple-step-outflow test using municipal waste showed that addition of JB (0.1%) had significantly effect on its moisture characteristic curve as evidenced by increasing of equilibrium moisture content over 12% under high matrix potential. |
