Zobrazeno 1 - 10
of 69
pro vyhledávání: '"Jeff B. Langman"'
Autor:
Jeff B. Langman
Publikováno v:
Mining, Vol 4, Iss 3, Pp 469-488 (2024)
Groundwater quality can be impacted by the backfilling of coal pits with waste rock containing new mineral surfaces and nanomaterials. This study was implemented to identify newly available arsenic and selenium sources in waste rock from the Cordero
Externí odkaz:
https://doaj.org/article/f17c6073abb845088d2bae2e18516e46
Autor:
Julianna Martin, Jeff B. Langman
Publikováno v:
Geosciences, Vol 14, Iss 1, p 4 (2023)
Restoration of open-pit mines may utilize waste rock for landscape reconstruction, which can include the construction of backfill aquifers. Weathering and contaminant transport may be different in backfill aquifers compared to the surrounding aquifer
Externí odkaz:
https://doaj.org/article/5671c918b8bb4e98950689ea809ff160
Publikováno v:
Water, Vol 15, Iss 19, p 3362 (2023)
Precipitation infiltrates into the lead–zinc–silver Bunker Hill Mine, oxidizes pyrite, and produces acidic waters that discharge from the mine portal. The metasedimentary geology and alteration from 100+ yr of mining provide a heterogeneous envir
Externí odkaz:
https://doaj.org/article/5fa2979f3eac4401b8d346899173789a
Publikováno v:
Hydrology, Vol 10, Iss 1, p 23 (2023)
The mobility of a metal in mining-impacted sediments is determined by the environmental conditions that influence the metal’s oxidation state and bonding environment. Coeur d’Alene Lake, USA, has been impacted by legacy mining practices that allo
Externí odkaz:
https://doaj.org/article/817d42058aef44148dfb087d167841ac
Publikováno v:
Geosciences, Vol 13, Iss 1, p 9 (2022)
The heterogeneity of the fractured-basalt and interbedded-sediment aquifer along the eastern margin of the Columbia Plateau Regional Aquifer System has presented challenges to resource managers in quantifying recharge and estimating sustainable withd
Externí odkaz:
https://doaj.org/article/775a6264fe2744638b384f3a5821b724
Publikováno v:
Hydrology, Vol 9, Iss 6, p 94 (2022)
A snowpack’s δ2H and δ18O values evolve with snowfall, sublimation, evaporation, and melt, which produces temporally variable snowpack, snowmelt, and runoff isotope signals. As a snowpack ages, the relatively depleted δ2H and δ18O values of sno
Externí odkaz:
https://doaj.org/article/5d99b0b76de7468fb16dd345319f2790
Autor:
David Behrens, Jeff B. Langman, Erin S. Brooks, Jan Boll, Kristopher Waynant, James G. Moberly, Jennifer K. Dodd, John W. Dodd
Publikováno v:
Geosciences, Vol 11, Iss 10, p 400 (2021)
The heterogeneity and anisotropy of fractured-rock aquifers, such as those in the Columbia River Basalt Province, present challenges for determining groundwater recharge. The entrance of recharge to the fractured-basalt and interbedded-sediment aquif
Externí odkaz:
https://doaj.org/article/bf37ea5c149c4c7aa8c6bd547560e5d0
Publikováno v:
Minerals, Vol 10, Iss 10, p 849 (2020)
The oxidation state of sulfur [S] is a primary control on mobility of metals in sediments impacted by legacy mining practices. Coeur d’Alene Lake of northern Idaho, USA, has been impacted by upstream legacy mining practices that deposited an estima
Externí odkaz:
https://doaj.org/article/24b4f94dc0464469bdfdf3ba6b08f4a8
Publikováno v:
Minerals, Vol 4, Iss 2, Pp 257-278 (2014)
A five-year, humidity-cell experiment was used to study the weathering evolution of a low-sulfide, granitic waste rock at 5 and 22 °C. Only the rock with the highest sulfide content (0.16 wt %) released sufficient acid to overcome a limited carbonat
Externí odkaz:
https://doaj.org/article/f7ee2158fb0b49a691236a4c47df1e24
Publikováno v:
Water Environment Research. 93:1714-1721
Equilibrium sorption and desorption experiments were conducted with clinoptilolite to evaluate the potential sorption/desorption of iron during different pH conditions. Sorption experiments indicated a partitioning of 0% to 17% of the iron in solutio