Production of Hydrogen Peroxide in Groundwater at Rifle, Colorado
Journal Article
·
· Environmental Science and Technology
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Earth and Environmental Sciences
- Peking Univ., Beijing (China). Inst. of Water Sciences and College of Engineering
- Univ. of New South Wales, Sydney, NSW (Australia). School of Civil and Environmental Engineering
The commonly held assumption that photodependent processes dominate H2O2 production in natural waters has been recently questioned. Here, we present evidence for the unrecognized and light-independent generation of H2O2 in groundwater of an alluvial aquifer adjacent to the Colorado River near Rifle, CO. In situ detection using a sensitive chemiluminescent method suggests H2O2 concentrations ranging from lower than the detection limit (<1 nM) to 54 nM along the vertical profiles obtained at various locations across the aquifer. Our results also suggest dark formation of H2O2 is more likely to occur in transitional redox environments where reduced elements (e.g., reduced metals and NOM) meet oxygen, such as oxic-anoxic interfaces. A simplified kinetic model involving interactions among iron, reduced NOM, and oxygen was able to reproduce roughly many, but not all, of the features in our detected H2O2 profiles, and therefore there are other minor biological and/or chemical controls on H2O2 steady-state concentrations in such aquifer. Because of its transient nature, the widespread presence of H2O2 in groundwater suggests the existence of a balance between H2O2 sources and sinks, which potentially involves a cascade of various biogeochemically important processes that could have significant impacts on metal/nutrient cycling in groundwater-dependent ecosystems, such as wetlands and springs. More importantly, our results demonstrate that reactive oxygen species are not only widespread in oceanic and atmospheric systems but also in the subsurface domain, possibly the least understood component of biogeochemical cycles.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1476518
- Journal Information:
- Environmental Science and Technology, Journal Name: Environmental Science and Technology Journal Issue: 14 Vol. 51; ISSN 0013-936X
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Arsenate removal from underground water by polystyrene-confined hydrated ferric oxide (HFO) nanoparticles:effect of humic acid
|
journal | December 2019 |
Degradation of the recalcitrant oil spill components anthracene and pyrene by a microbially driven Fenton reaction
|
journal | September 2017 |
Similar Records
Hydrogen Peroxide Detection in Groundwater at Rifle, Colorado
Production of hydrogen peroxide in an intra-meander hyporheic zone at East River, Colorado.
Dataset
·
Mon Dec 31 23:00:00 EST 2018
·
OSTI ID:1508395
Production of hydrogen peroxide in an intra-meander hyporheic zone at East River, Colorado.
Journal Article
·
Wed Jan 12 19:00:00 EST 2022
· Scientific Reports
·
OSTI ID:1848069