饱水岩层生物地球化学特征与氮转化  

A Study of Biogeochemical Characteristics and Nitrogen Transformation of the Saturation Stratum

作　　者：杨维[1] 王泳[1] 李宇斌 潘俊[1] 袁雅姝[1] 郭毓[1] 

机构地区：[1]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168 [2]辽宁省环境科学研究院,辽宁沈阳110031

出　　处：《沈阳建筑大学学报（自然科学版）》2006年第5期812-816,共5页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家建设部重点科技项目(03-2-058)

摘　　要：目的研究浑河流域第四纪松散岩层构成的潜水中较高铁锰含量对浅层地下水氮转化的影响.方法运用水文地球环境化学理论,结合现场取样和室内实验,研究了地下水中铁锰对氮转化的化学及生物作用的机理.对浑河支流的细河近岸饱水层110 m深度剖面岩土的地球化学指标和微生物分别进行了测定和培养鉴定.结果研究结果表明在岩土呈弱酸性的条件下,随着剖面深度的变化,微生物指标和地球化学指标相互之间表现出显著的相关性,曲线的峰值段和波动段大部分相吻合.结论岩性以及原生铁锰普遍含量较高的生物地球化学环境对地层中氮转化的主导控制作用显著,表现为岩土中氨态氮含量高.此项研究将为修复微污染地下水,探讨区域环境系统氮演变趋势提供技术支持.The research aims to study the influence of the higher manganese and iron contents in the phreatic aquifer of quarternary loose stratum on nitrogen transformation in the shallow phreatic aquifer in the Hun River basin. With the environmental hydro- geochemistry theory, the mechanism of the chemical and biological function of iron and manganese on the nitrogen transformation is studied through in - site sampling and laboratory analysis. The geochemical indexes and microbial indicator from the rock samples of saturation zone are measured, which are taken from a depth of 110m near the northern bank of the Xi River, a tributary of the Hun River. The results illustrate that the close relationship between the geochemical indexes and microbial indicators exist with the longitudinal profile of the borebole at the pH of 6.14-6.64, including the peaks and fluctuating sections. The lithologic natures and the local biogeochemical environment have significant effects on the nitrogen transformation, resulting in the higher mass- fraction of ammonium. The research results provide the technological parameters for remediating micro- polluted groundwater and studying the trend of nitrogen transformation in the regional environmental system.

关 键 词：地下水 氨氮 反硝化作用 铁锰 冲洪积扇 饱水岩层 

分 类 号：X131.2[环境科学与工程—环境科学]