摘要
为了解决农业农田浅层地下水硝酸盐污染问题,研究通过辐射状布点法采集西部多个地区浅井样本,并采用紫外分光光度法精准检测硝酸盐氮浓度。根据实验分析结果,农田硝酸盐污染主要集中在7月晒田期,平均浓度为(22.5±7.6)mg/L,超标率38.2%。在农田类型差异分析中,露地蔬菜区污染最重,平均浓度为28.6±9.3 mg/L,超标率54.3%,而水稻单作区污染最低,平均浓度为8.7±3.1 mg/L。在区域风险分析中,露地蔬菜与稻油轮区作主要为高风险区,超标率均高于39%,动态风险指数均大于3.0。最后,研究根据不同地区污染给出了有效的土壤治理措施,该项研究将为农田硝酸盐污染防控提供科学依据。
In order to solve the problem of nitrate pollution in shallow groundwater in agricultural fields,a study was conducted to collect shallow well samples from multiple western regions using the radial distribution method,and the nitrate nitrogen concentration was accurately detected using ultraviolet spectrophotometry.According to experimental analysis,nitrate pollution in farmland is mainly concentrated during the sun drying period in July,with an average concentration of(22.5±7.6)mg/L and a exceedance rate of 38.2%.In the analysis of differences in farmland types,the open field vegetable areas has the heaviest pollution,with an average concentration of 28.6±9.3 mg/L and a exceedance rate of 54.3%,while rice monoculture areas has the lowest pollution,with an average concentration of 8.7±3.1 mg/L.In the regional risk analysis,open field vegetable and rice oil rotation areas are dominated as high-risk areas,with exceedance rates higher than 39%and dynamic risk indices greater than 3.0.Finally,the study provided effective soil remediation measures based on pollution in different regions,which will provide scientific basis for the prevention and control of nitrate pollution in farmland.
出处
《化工设计通讯》
2026年第2期121-123,共3页
Chemical Engineering Design Communications
关键词
硝酸盐污染
浅层地下水
农田类型
动态风险评估
西部
nitrate pollution
shallow groundwater
type of farmland
dynamic risk assessment
west
