Geochemical and microbiological methods for evaluating anaerobic processes in an aquifer contaminated by landfill leachate.
Geochemical and microbiological methods for evaluating anaerobic processes in an aquifer contaminated by landfill leachate.
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用于评估被垃圾渗滤液污染的含水层中厌氧过程的地球化学和微生物方法。
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
S. Christenson
中科院分区：
文献类型：
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作者：
I. Cozzarelli;J. M. Suflita;G. Ulrich;S. H. Harris;M. Scholl;J. L. Schlottmann;S. Christenson
需要结合地球化学和微生物学的方法来描述在诺曼，OK的垃圾渗滤液污染的含水层中发生的生物地球化学过程，在缺氧烟柱中，微生物介导的重要反应是铁还原，硫酸盐还原和甲烷生成。硫酸盐还原速率最高（13.2 μM/d）的地方靠近地下水位，硫酸盐含量最高（4.6 mM）。硫酸盐池中34S富集（SO42- δ34S为67 ~ 69‰），溶解氢测量结果进一步支持了地下水位附近硫酸盐还原的重要性。甲烷在羽流中心被发现，那里的硫酸盐被耗尽了。微生物培养表明，在羽流的缺氧部分，伴随有硫酸盐还原和甲烷生成。尽管在整个含水层中都检测到高浓度的可溶性还原铁，并且H2水平表明在稳态条件下铁还原铁。
A combined geochemical and microbiological approach was needed to delineate the biogeochemical processes occurring in an aquifer contaminated by landfill leachate in Norman, OK, where the important microbially mediated reactions in an anoxic plume were iron reduction, sulfate reduction, and methanogenesis. The highest rates of sulfate reduction (13.2 μM/day) were detected near the water table where sulfate levels were maximal (up to 4.6 mM). The enrichment of 34S in the sulfate pools (δ34S of SO42- was 67−69‰), and dissolved hydrogen measurements provided additional support for the importance of sulfate reduction near the water table. Methane was detected in the center of the plume where sulfate was depleted. Microbial incubations demonstrated concomitant sulfate reduction and methanogenesis in the anoxic portion of the plume. Although high concentrations of soluble reduced iron were detected throughout the aquifer and H2 levels were indicative of iron reduction under steady-state conditions, microbiologi...