生态环境学报2017，Vol.26Issue(5)：876-882,7.DOI:10.16258/j.cnki.1674-5906.2017.05.021
不同参数下植被过滤带对径流中农药的净化效果研究
Experimental Study on the Purification Effects of Vegetative Filter Strips on the Pesticide under the Different Parameters
摘要
Abstract
This study aims to provide the theoretic proof and reference for the application of the vegetation filter strips (VFS) to controlling the major pesticide remnants in runoff in Northwestern China. The new style pesticide-high efficiency lambda-cyhalothrin, used in Mei county of Shaanxi province, is extremely harmful to the prawn and fish of the rivers when flowing into the nearby water recipients along with the runoff during agricultural production. The VFS, as a type of biological measure, concentrates mainly on the purification-effect research on preventing the pollutants such as sediment, nitrogen, phosphorus and COD. However, less research is focused on the purification effects for pesticide. In this paper, through the field water flow experiment, we studied the purification effects of VFSs (composed of the seabuckthorn shrub (Hippophae rhamnoides L.) and herb vegetation, respectively) on the pesticide in the runoff under the various parameters. The results showed that: (1) when both the inflow discharge is 0.85 L·s-1 and the pollutant mass concentration is 0.3 mg·L-1, and the soil initial moisture content is 20%, 50%, and 70%, respectively, the less the soil initial moisture content, the higher the load reduction rate is: (2) when both the pollutant mass concentration is 0.3 mg·L-1 and the soil initial moisture content is 20%, and the inflow rate is 0.85, 1.5, 7.1 L·s-1, respectively, the less the inflow rate, the better the purification effect is. That is to say, when the inflow rate is 0.85 L·s-1, the concentration reduction rate and the load reduction rate within the seabuckthorn filter strip (SFS) can be up to 62% and 86.02%, respectively, and the concentration reduction rate and the load reduction rate within the herb filter strip (HFS) can be up to 62.67% and 87.69%, respectively. (3) When the inflow rate is 0.85 L·s-1, the initial moisture content is 20% and inflow pollutant mass concentration is 0.3, 0.6, 0.9 mg·L-1, respectively, the bigger the inflow pollutant concentration, the better the purification effect is. That is to say, when the inflow mass concentration is 0.9 mg·L-1, the concentration reduction rate and the load reduction rate of the SFS can be up to 83%and 91.38%, respectively, and the concentration reduction rate and the load reduction rate of the HFS can be up to 84.33% and 95.43%, respectively. In addition, the purification effect of the HFS is better than that of the SFS by computation comparison.关键词
植被过滤带/高效氯氟氰菊酯/净化效果/非点源污染/野外试验Key words
vegetative filter strips/lambda-cyhalothrin/purification effect/non-point source pollution/field experiment分类
资源环境引用本文复制引用
马艺坤,杨方社,李怀恩,刘兴誉,王浩,张鸿敏,韩琛..不同参数下植被过滤带对径流中农药的净化效果研究[J].生态环境学报,2017,26(5):876-882,7.基金项目
国家自然科学基金项目(51279163) （51279163）
西北旱区生态水利工程国家重点实验室培育基地项目(2016KFKT-4) （2016KFKT-4）
