Soumitri S. Dasgupta

TL;DR: The need for remediation of polyand perfluoroalkyl substances (PFASs) is growing as a result of more regulatory attention to this new class of contaminants with diminishing water quality standards being promulgated, commonly in the parts per trillion range.

TL;DR: In this article, a vertical profile of peat pore water δ18O and δ2H from a range of bog and fen landforms across the Glacial Lake Agassiz Peatlands, northern Minnesota was surveyed and the authors found that local-scale recharge penetrates to not only the basal peat at topographically high bog crests but also transitional Sphagnum lawns and low-lying fen water tracks.

TL;DR: Analysis of pore-water chemistry in northern Minnesota suggests that rates of methane production can be finely tuned to multi-decadal shifts in precipitation that drive the vertical penetration of labile carbon substrates within the Glacial Lake Agassiz Peatlands.

TL;DR: In this article, the authors used ratios of Ca/Mg and 87 Sr/86 Sr to distinguish discharge of calcareous groundwater from the peatland from the mineral substratum along a topographic gradient from a bog crest downslope to an internal fen water track and bog islands.

TL;DR: In this paper, the results of new geochemical mixing models that incorporate organic acid dissociation constants to understand how organic acids control the acid-base chemistry in mixtures of dilute acidic bog pore waters and circum-neutral groundwater (typical of carbonate terrains) that upwells or disperses into peat deposits.