...
首页> 外文期刊>Hydrological Processes >Lithological controls on biological activity and groundwater chemistry in Quaternary sediments
【24h】

Lithological controls on biological activity and groundwater chemistry in Quaternary sediments

机译:第四纪沉积物生物活性和地下水化学的岩性控制

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       

摘要

Depth profiles of solute chemistry and sulfate isotopic compositions are presented for groundwater and pore water in a sequence of Quaternary glacial outwash sediments. Sand units show evidence for hydraulic connection to the surface and thus modem sources of solutes. Finer-grained sediments show a general pattern of increasing solute concentrations with depth, with sulfate derived from ancient rainwater and pyrite oxidation in the soil/drift. In these sediments sulfate has undergone bacterial sulfate reduction (BSR) to produce biogenic sulfide. In clay sediments, with d_(10) ≤ 1.6 μm, high concentrations of sulfate and acetate now co-exist, implying that BSR is inhibited. The correlation with smaller sediment grain size indicates that this is due to pore size exclusion of the sulfate reducing bacteria. Mechanical restriction of microbial function thus provides a fundamental limitation on microbial respiration in buried clay-rich sediments, which acts as a control on the chemical evolution of their pore waters.
机译:给出了一系列第四纪冰川冲积沉积物中地下水和孔隙水的溶质化学和硫酸盐同位素组成的深度剖面。沙粒单元显示出与地面的液压连接的证据,因此也显示出现代溶质来源。细粒沉积物显示出溶质浓度随深度增加的一般模式,硫酸盐来自古老的雨水和土壤/漂移物中的黄铁矿氧化。在这些沉积物中,硫酸盐经历了细菌硫酸盐还原(BSR)的作用,产生了生物硫化物。在d_(10)≤1.6μm的黏土沉积物中,高浓度的硫酸盐和乙酸盐现已共存,这表明BSR被抑制了。与较小沉积物粒度的相关性表明,这是由于硫酸盐还原细菌的孔径大小被排除在外。因此,对微生物功能的机械限制对富含粘土的地下沉积物中的微生物呼吸提供了基本限制,从而限制了其孔隙水的化学演化。

著录项

  • 来源
    《Hydrological Processes》 |2010年第6期|726-735|共10页
  • 作者单位

    Institute of Geological Sciences. School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK School of Geography, Earth and Environmental Sciences. University of Birmingham, Birmingham, B15 2TT, UK;

    Institute of Geological Sciences. School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK;

    BWB Consulting Ltd. Integrated Engineering and Environmental Consultants, Nottingham, NG1 1PY. UK;

    Groundwater Protection and Restoration Group, Kroto Research institute, North Campus, Universitv of Sheffield, Broad Lane, Sheffield S3 7HQ, UK;

    Institute of Geological Sciences. School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK Shell Global Solutions. Shell Technology Centre, Thornton, Chester, CH13SH, UK;

    Institute of Geological Sciences. School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    groundwater; sulfate; bacterial sulfate reduction; grain size; size exclusion; biological activity;

    机译:地下水;硫酸盐减少细菌硫酸盐;晶粒大小;尺寸排除;生物活性;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号