| 天然胶体对含水介质中氨氮迁移的影响 |
| |
| 引用本文： | 王博,李海明,贾晓玉,吴锦兰. 天然胶体对含水介质中氨氮迁移的影响[J]. 环境科学与技术, 2009, 32(7) |
| |
| 作者姓名： | 王博 李海明 贾晓玉 吴锦兰 |
| |
| 作者单位： | 天津科技大学水土环境污染控制研究室,天津,300457;天津科技大学水土环境污染控制研究室,天津,300457;天津科技大学水土环境污染控制研究室,天津,300457;天津科技大学水土环境污染控制研究室,天津,300457 |
| |
| 摘 要： | 为了研究天然胶体对氨氮在滨海含水介质中迁移的影响,文章采用室内土柱实验,分析了0、70、160、265和630mg/L五种不同浓度胶体影响下氨氮的迁移-转化规律。研究结果表明:氨氮在胶体影响下的穿透曲线表现为"未穿透"、"开始穿透"和"完全穿透"三个阶段,但是不同胶体浓度下三个阶段出现的孔隙体积数不同。胶体对氨氮迁移的影响与胶体浓度有关,当胶体浓度为70mg/L和160mg/L时,氨氮完全穿透时的孔隙体积数小于无胶体情况,胶体对氨氮的迁移具有促进作用;当胶体浓度为265mg/L和630mg/L时,氨氮完全穿透时的孔隙体积数大于无胶体情况,胶体对氨氮的迁移具有阻滞作用。这说明在160mg/L和265mg/L之间存在一个临界浓度;当胶体浓度达到临界浓度之前,胶体对氨氮的迁移起促进作用;当浓度超过临界浓度后,胶体对氨氮的迁移起阻滞作用。
|
| 关 键 词： | 含水介质 胶体 氨氮 迁移 |
Effect of Natural Colloid on Ammonia Nitrogen Transport in Water-bearing Media |
| |
| WANG Bo,LI Hai-ming,JIA Xiao-yu,WU Jin-lan. Effect of Natural Colloid on Ammonia Nitrogen Transport in Water-bearing Media[J]. Environmental Science and Technology, 2009, 32(7) |
| |
| Authors: | WANG Bo LI Hai-ming JIA Xiao-yu WU Jin-lan |
| |
| Affiliation: | Laboratory of Water and Soil Environment Pollution Control;Tianjin University of Science and Technology;Tianjin 300457;China |
| |
| Abstract: | Effects of natural colloids on transport of ammonia nitrogen were studied in sand packed laboratory columns under five different concentrations of colloid.Solutions of deionized water(DI),70,160,265 and 630mg/L were used in saturated columns.Results showed that breakthrough curves of ammonia nitrogen presented as three stages including not-yet-breakthrough,breakthrough in process and complete breakthrough.The pore volumes of three stages were different under various colloid concentration conditions.When col... |
| |
| Keywords: | water bearing media colloid ammonia nitrogen transport |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
