| 王珑,马耀光.灌溉条件下铬在黄土层中迁移机制的研究[J].干旱地区农业研究,2013,31(1):122~126 |
| 灌溉条件下铬在黄土层中迁移机制的研究 |
| Study on migration mechanism of chromium in loess soil under irrigation condition |
| |
| DOI：10.7606/j.issn.1000-7601.2013.01.23 |
| 中文关键词: 铬 黄土 迁移规律 |
| 英文关键词:chromium loess migration characteristics |
| 基金项目:国家自然科学基金（50879071） |
|
| 摘要点击次数: 200 |
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| 中文摘要: |
| 通过室内土柱淋滤试验，以灌水量和铬浓度为控制因
子，研究铬在黄土层中垂向迁移规律及吸附特性，以便解决铬污染导致的土壤及地下水环境
质量问题。试验共设5个灌水定额和5个铬浓度，采用完全组合设计，共25个处理。试验结果
显示：(1) 相同铬浓度条件下，铬含量与灌水量和土层含水量呈正相关；10 cm土层深度处
，当铬浓度为25.0 mg·L-1、灌水量为318.5 mm时，铬含量出现峰值98.7 mg·kg-1。(2) 相同灌水量条件下，铬含量和吸附率都随铬浓度的增大而增大。表明铬在黄土
中的迁移与土层深度
、灌水量、土层含水量和铬浓度等因素密切相关。 |
| 英文摘要: |
| Aimed at the environmental quality issues of soil
and groundwater caused by chromium pollution, the vertical migration and absorpt
ion characteristics of chromium in loess were studied through indoor soil column
-eaching test with the irrigation quantity and concentration of chromium as co
n
trolling factors. The experiments were performed with 25 treatments including 5
levels of irrigation quota and 5 levels of chromium concentration, using the ful
l combination design. The result showed that the soil chromium content in the sa
me loess layer was positively correlated with irrigation quantity and soil water
content under the condition of the same chromium concentration. When chromium c
oncentration was 25.0 mg·L-1 and irrigation quantity was 318.5 mm, the co
ntent of c
hromium reached the highest point (98.7 mg·kg-1) at 10 cm soil depth.
Under the con
dition of the same irrigation quantity, the chromium content and absorption rate
in soil increased with the increase of chromium concentration. It could be conc
luded that the migration of chromium in loess was closely related with the depth
of soil, irrigation quantity, soil water content and chromium concentration. |
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