Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Regina N. Tempel"'
Publikováno v:
Computers & Geosciences. 123:149-160
Mineral carbonation is one of the many ways that are being actively investigated to sequester point-source carbon dioxide emissions. However, relations between reaction conditions, variations in reactant mineral composition, and carbon sequestration
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::029d6e19b5ece910e260b95e80be0598
https://doi.org/10.1016/j.cageo.2018.12.003
https://doi.org/10.1016/j.cageo.2018.12.003
Publikováno v:
Journal of African Earth Sciences. 149:72-83
Ion exchange, dissolution and precipitation represent the effective hydrogeochemical processes water-rock interactions . They play a great role in the form of changes in the hydrogeochemical composition of the groundwater in the Pleistocene, Plio-Ple
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7cd24487ae87071fea8a6bc8c619fb00
https://doi.org/10.1016/j.jafrearsci.2018.07.026
https://doi.org/10.1016/j.jafrearsci.2018.07.026
Autor:
Shahnewaz Mohammad, Regina N. Tempel
Publikováno v:
Environmental Earth Sciences. 78
Arsenic (As) concentration in the Humboldt River (HR) water ranges from 0.012 to 0.06 mg/L, with an average of 0.032 mg/L. The river water is alkaline with pH 8.4–9.3 and oxic with average 12 mg/L of dissolved O2 and + 139 mV of oxidation–reducti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::24f53361e18a6818e26bbb1891a48299
https://doi.org/10.1007/s12665-019-8552-1
https://doi.org/10.1007/s12665-019-8552-1
Publikováno v:
International Journal of Greenhouse Gas Control. 99:103106
Basaltic rocks are being considered as a key host for carbon dioxide (CO2) storage. This is a function of their global distribution and relative reactivity, resulting in CO2 mineralization. However, the reactivity of mafic minerals allows for reactio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ccdd85deb93f0589225f04ef9541dead
https://doi.org/10.1016/j.ijggc.2020.103106
https://doi.org/10.1016/j.ijggc.2020.103106
Publikováno v:
Geothermics. 40:91-101
Geochemical reaction path and mass balance modeling techniques were used to test the hypothesis that an eastwardly flowing plume of thermal water in the southern moat of the Long Valley caldera system reacts with hydrothermally altered intra-caldera
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3ef4b199ec5d24536fcc083b93300f6c
https://doi.org/10.1016/j.geothermics.2011.03.001
https://doi.org/10.1016/j.geothermics.2011.03.001
Publikováno v:
The Canadian Mineralogist. 47:593-613
We provide a comprehensive review of research conducted on the dissolution–oxidation of As-bearing sulfides including arsenopyrite, orpiment, realgar, tennantite, and the amorphous forms of As2S3 and AsS. In general, a rise in pH and the presence o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f7790ba53687f2d2b3ea833333d09942
https://doi.org/10.3749/canmin.47.3.593
https://doi.org/10.3749/canmin.47.3.593
Autor:
Maggy F. Lengke, Regina N. Tempel
Publikováno v:
Geochimica et Cosmochimica Acta. 69:341-356
Arsenic sulfide (AsS (am), As2S3 (am), orpiment, and realgar) oxidation rates increase with increasing pH values. The rates of arsenic sulfide oxidation at higher pH values relative to those at pH∼2 are in the range of 26–4478, 3–17, 8–182, a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::93540d1e9aeee7b1ea10c5cfea894dee
https://doi.org/10.1016/j.gca.2004.06.032
https://doi.org/10.1016/j.gca.2004.06.032
Autor:
Maggy F. Lengke, Regina N. Tempel
Publikováno v:
Geochimica et Cosmochimica Acta. 67:859-871
The oxidation rates of natural realgar and amorphous synthetic AsS by dissolved oxygen were evaluated using mixed flow reactors at pH 7.2 to 8.8 and dissolved oxygen contents of 5.9 to 16.5 ppm over a temperature range of 25 to 40°C. The ratios of A
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::180888c5a225141b095ef516e0c69c74
https://doi.org/10.1016/s0016-7037(02)01227-9
https://doi.org/10.1016/s0016-7037(02)01227-9
Autor:
Regina N. Tempel, Maggy F. Lengke
Publikováno v:
Geochimica et Cosmochimica Acta. 66:3281-3291
The oxidation rate of natural orpiment from Carlin-type deposits was measured at 25 to 40°C in a mixed flow reactor as a function of pH (6.8 to 8.2) and dissolved oxygen concentration (6.4 to 17.4 ppm) with a starting ionic strength of 0.01 M NaCl.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8ebc8dd1ce8e2ef4247dd29a4420941b
https://doi.org/10.1016/s0016-7037(02)00925-0
https://doi.org/10.1016/s0016-7037(02)00925-0
Autor:
Regina N. Tempel, Maggy F. Lengke
Publikováno v:
Geochimica et Cosmochimica Acta. 65:2241-2255
The experimental studies of As2S3 (am) oxidative dissolution were investigated by use of particle sizes of 8 to 44 μm in a mixed flow reactor at 25 to 40°C and initial pH 7.3 to 9.4 to determine the effect of dissolved oxygen content, temperature,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ded6089c09017ca511a7b3bd12fac9df
https://doi.org/10.1016/s0016-7037(01)00592-0
https://doi.org/10.1016/s0016-7037(01)00592-0